KMC TELECOM HOLDINGS INC
10-Q, 1999-08-16
COMMUNICATIONS SERVICES, NEC
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                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                                 ------------

                                  FORM 10-Q

(Mark One)

|X|   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
      EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 1999

                           OR

| |   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
      EXCHANGE ACT OF 1934

For the transition period from ------------ to --------------

COMMISSION FILE NUMBER:  333-50475

                          KMC TELECOM HOLDINGS, INC.
            (Exact name of registrant as specified in its charter)

              DELAWARE                                 22-3545325
(State or other jurisdiction of         (I.R.S. Employer Identification No.)
incorporation or organization)


                          1545 ROUTE 206, SUITE 300
                         BEDMINSTER, NEW JERSEY 07921
        (Address, including zip code, of principal executive offices)

                                (908) 470-2100
             (Registrant's telephone number, including area code)

      Indicate by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. [X ] Yes [ ] No

      Indicate the number of shares  outstanding of each of the issuer's classes
of common stock, as of the latest practicable date.

          Class                                         Outstanding
          -----                                         -----------
      Common Stock, par value $0.01                     852,676 shares,
      per share.                                        as of  August 10, 1999




<PAGE>




                          KMC TELECOM HOLDINGS, INC.

                                    INDEX


PART I.  FINANCIAL INFORMATION                                       PAGE NO.

ITEM 1. Financial Statements

        Unaudited Condensed Consolidated Balance Sheets,
         December 31, 1998 and June 30, 1999.   ............................   2

        Unaudited Condensed Consolidated Statements of Operations,
         Three Months Ended June 30, 1998 and 1999 and Six Months
         Ended June 30, 1998 and 1999 ......................................   3

        Unaudited Condensed Consolidated Statements of Cash Flows, Six
         Months Ended June 30, 1998 and 1999................................   4

        Notes to Unaudited Condensed Consolidated Financial Statements......   5

ITEM 2. Management's Discussion and Analysis of Financial Condition
         and Results of Operations..........................................  12

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk..........  17



PART II.  OTHER INFORMATION

ITEM 1. Legal Proceedings...................................................  18

ITEM 2. Changes in Securities and Use of Proceeds...........................  18

ITEM 3. Defaults Upon Senior Securities.....................................  18

ITEM 4. Submission of Matters to a Vote of Security Holders.................  18

ITEM 5. Other Information...................................................  20

ITEM 6. Exhibits and Reports on Form 8-K....................................  20

SIGNATURES..................................................................  23






<PAGE>




                        PART I - FINANCIAL INFORMATION

                          KMC TELECOM HOLDINGS, INC.
               UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS
                                (IN THOUSANDS)
                                                         DECEMBER     JUNE 30,
                                                            31,         1999
                                                            1998
                                                         ----------- -----------

ASSETS
Current assets:
  Cash and cash equivalents...........................   $   21,181     $187,992
  Restricted investments..............................            -       37,125
  Accounts receivable, net of allowance for doubtful          7,539       19,489
    accounts..........................................
  Prepaid expenses and other current assets...........        1,315        1,543
                                                         -----------  ----------
Total current assets..................................       30,035      246,149
Investments held for future capital expenditures......       27,920       64,000
Long term restricted investments......................            -       67,430
Networks and equipment, net...........................      224,890      386,426
Intangible assets, net................................        2,829        2,142
Deferred financing costs, net.........................       20,903       41,076
Due from affiliate....................................            -          207
Other assets..........................................        4,733        1,322
                                                         ----------  -----------
                                                         $  311,310  $   808,752
                                                         =========== ===========

LIABILITIES, REDEEMABLE AND NONREDEEMABLE EQUITY (DEFICIENCY)
Current liabilities:
  Accounts payable....................................   $   21,052  $   112,637
  Accrued expenses....................................       10,374       33,609
                                                         ----------  -----------
Total current liabilities.............................       31,426      146,246
Notes payable.........................................       41,414      125,000
Senior discount notes payable.........................      267,811      283,472
Senior notes payable..................................            -      275,000
                                                         ----------  -----------
Total liabilities.....................................      340,651      829,718
Commitments and contingencies
Redeemable equity:
   Senior  redeemable,  exchangeable,  PIK preferred
     stock,  par value $.01 per share; authorized:
     -0- shares in 1998, 630 shares in 1999; shares issued and
     outstanding:
       Series E, - 0 - shares in 1998 and 61 shares in
        1999 ($60,695 liquidation preference).........            -       45,827
       Series F, - 0 - shares in 1998 and 41 shares in
        1999 ($41,112 liquidation preference).........            -       37,009
  Redeemable  cumulative  convertible  preferred stock,
    par value $.01 per share 499 shares authorized;
    shares issued and outstanding:
      Series A, 124 shares in 1998 and 1999 ($12,380
       liquidation preference).........................      30,390       55,721
      Series C, 175 shares in 1998 and 1999 ($17,500
       liquidation preference).........................      21,643       32,524
  Redeemable common stock, 224 shares issued and
    outstanding.......................................       22,305       29,223
  Redeemable common stock warrants....................          674       11,964
                                                         ----------  -----------
Total redeemable equity...............................       75,012      212,268
                                                         ----------  -----------
Nonredeemable equity (deficiency):
  Common stock, par value  $.01 per share; 3,000
    shares authorized, 614 shares and 629 shares
    issued and outstanding in 1998 and 1999,
    respectively......................................            6            6
  Additional paid-in capital..........................       13,750            -
  Unearned compensation...............................       (5,824)    (10,796)
  Accumulated deficit.................................     (112,285)   (222,444)
                                                         ----------- -----------
Total nonredeemable equity (deficiency)...............     (104,353)   (233,234)
                                                         ----------- -----------
                                                         $  311,310  $   808,752
                                                         =========== ===========

                           See accompanying notes.

                                       2
<PAGE>


                          KMC TELECOM HOLDINGS, INC.

          UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
               (IN THOUSANDS, EXCEPT SHARE AND PER SHARE DATA)

<TABLE>
<CAPTION>

                                         THREE MONTHS ENDED       SIX MONTHS ENDED
                                              JUNE 30,                JUNE 30,
                                       ----------------------- -----------------------
<S>                                       <C>         <C>         <C>         <C>
                                          1998        1999        1998        1999
                                       ----------- ----------- ----------- -----------
Revenue.............................   $   4,545   $   15,634  $   7,338   $   26,712

Operating expenses:
  Network operating costs...........       8,103       24,385     13,919       44,055
  Selling, general and                     5,747       14,734      9,220       26,724
    administrative..................
  Stock option compensation expense.       5,097       16,332      6,196       20,201
  Depreciation and amortization.....       1,063        6,113      2,056       11,636
                                       ----------  ----------- ----------  ----------
    Total operating expenses........      20,010       61,564     31,391      102,616
                                       ----------  ----------- ----------  ----------
Loss from operations................     (15,465)     (45,930)   (24,053)     (75,904)
Other expense.......................           -       (4,297)         -       (4,297)
Interest income.....................
                                           2,166        2,113      5,019        3,055
Interest expense....................      (7,334)     (15,687)   (14,563)     (26,014)
                                       ----------  ----------- ----------- -----------
Net loss............................     (20,633)     (63,801)   (33,597)    (103,160)

Dividends and accretion on
  redeemable preferred stock........      (6,687)     (31,971)   (10,040)     (43,415)
                                       ----------- ----------- ----------- -----------
Net loss applicable to common
  shareholders......................   $  (27,320) $  (95,772)    (43,637)   (146,575)
                                       =========== =========== =========== ===========

Net loss per common share...........   $   (32.61) $  (112.32) $   (52.71) $  (172.31)
                                       =========== =========== =========== ===========

Weighted average number of common
  shares outstanding................      837,876     852,676     827,827     850,632
                                       =========== =========== =========== ===========
</TABLE>


                           See accompanying notes.



                                       3
<PAGE>







                          KMC TELECOM HOLDINGS, INC.

          UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                (IN THOUSANDS)

<TABLE>
<CAPTION>
                                                            SIX MONTHS ENDED
                                                                JUNE 30,
                                                         -----------------------
                                                            1998        1999
                                                         ----------- -----------
<S>                                                      <C>         <C>
OPERATING ACTIVITIES
Net loss..............................................   $  (33,597) $ (103,160)

Adjustments to reconcile net loss to net cash
 used in operating activities:
  Depreciation and amortization.......................        2,056      11,636
  Non-cash interest expense...........................       14,142      22,834
  Non-cash stock option compensation expense..........        6,196      20,201
 Changes in assets and liabilities:
    Accounts receivable...............................      (2,120)     (11,950)
    Prepaid expenses and other current assets.........        (407)        (228)
    Other assets......................................        (292)         860
    Accounts payable..................................      (3,889)       6,888
    Accrued expenses..................................         697        7,921
    Due from affiliate................................         (47)        (207)
                                                         ----------  -----------
Net cash used in operating activities.................     (17,261)     (45,205)
                                                         ----------  -----------

INVESTING ACTIVITIES
Construction of networks and purchases of equipment...     (22,081)     (83,725)
Acquisitions of franchises, authorizations and              (1,212)        (230)
  related assets......................................
Deposit on purchases of equipment.....................      (5,000)           -
Purchases of investments, net.........................    (153,500)     (36,080)
                                                         ----------  -----------
Net cash used in investing activities.................    (181,793)    (120,035)
                                                         ----------  -----------

FINANCING ACTIVITIES
Repayment of notes payable............................     (20,801)           -
Proceeds from issuance of preferred stock and related
  warrants, net of issuance costs.....................           -       91,235
Proceeds from issuance of common stock and warrants,
  net of issuance costs ..............................       20,451           -
Proceeds from exercise of stock options...............            -         333
Proceeds from issuance of senior discount notes, net
  of issuance costs...................................      226,056           -
Proceeds from issuance of senior notes, net of
  issuance costs and purchase of portfolio of
  restricted investments..............................            -     159,942
Proceeds from senior secured credit facility, net of
  issuance costs......................................            -      82,770
Issuance costs of Lucent facility.....................            -      (2,229)
Dividends on preferred stock of subsidiary............        (592)           -
                                                         ----------  -----------

Net cash provided by financing activities.............     225,114      332,051
                                                         ----------  -----------

Net increase in cash and cash equivalents.............      26,060      166,811
Cash and cash equivalents, beginning of period........      15,553       21,181
                                                         ----------  -----------

Cash and cash equivalents, end of period..............   $  41,613   $  187,992
                                                         ==========  ===========
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest, net of
  amounts capitalized.................................  $    2,200   $    3,180
                                                         ==========  ===========
</TABLE>

                           See accompanying notes.



                                       4
<PAGE>




                          KMC TELECOM HOLDINGS, INC.

        NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

                                JUNE 30, 1999

1. BASIS OF PRESENTATION AND ORGANIZATION

      KMC Telecom  Holdings,  Inc. and its  subsidiaries,  KMC Telecom Inc., KMC
Telecom II, Inc., KMC Telecom III, Inc., KMC Telecom of Virginia,  Inc., and KMC
Investments,  Inc.  are  collectively  referred  to herein as the  Company.  All
significant  intercompany  accounts and  transactions  have been  eliminated  in
consolidation.

      The  unaudited  condensed  consolidated  financial  statements  have  been
prepared in accordance with generally accepted accounting principles for interim
financial  reporting.  Accordingly,  they do not include certain information and
note disclosures required by generally accepted accounting principles for annual
financial  reporting  and  should  be read in  conjunction  with  the  financial
statements and notes thereto of KMC Telecom Holdings, Inc.
as of and for the year ended December 31, 1998.

      The unaudited interim financial  statements  reflect all adjustments which
management  considers  necessary  for a  fair  presentation  of the  results  of
operations for these periods.  The results of operations for the interim periods
are not necessarily indicative of the results for the full year.

      The balance sheet of KMC Telecom  Holdings,  Inc. at December 31, 1998 was
derived from the audited consolidated balance sheet at that date.


2.  INVESTMENTS HELD FOR FUTURE CAPITAL EXPENDITURES

      The Company has designated  certain amounts as investments held for future
capital  expenditures.  As of June 30, 1999, the Company's  investments held for
future capital  expenditures  consisted of cash equivalents  (bank term deposits
and commercial  paper with maturities of less than 90 days) of $58.7 million and
debt  securities (US government  obligations  and commercial  bonds due within 1
year) of $5.3 million.  All debt  securities have been designated by the Company
as   held-to-maturity.   Accordingly,   such  securities  are  recorded  in  the
accompanying  financial  statements  at amortized  cost.  At June 30, 1999,  the
carrying value of such held-to-maturity debt securities  approximated their fair
value.


3. NETWORKS AND EQUIPMENT

      Networks and equipment are comprised of the following (in thousands):

                                                    DECEMBER 31,     JUNE 30,
                                                       1998            1999
                                                   -----------    ------------
Fiber optic systems..............................     $99,502        $114,623
Telecommunications equipment.....................     115,769         134,276
Furniture and other..............................       7,340          19,947
Leasehold improvements...........................       1,177           1,441
Construction-in-progress.........................      11,770         135,969
                                                   -----------     -----------
                                                      235,558         406,256
Less accumulated depreciation....................     (10,668)       (19,830)
                                                   -----------     -----------
                                                     $224,890        $386,426
                                                   ===========     ===========

                                       5
<PAGE>

     Costs capitalized  during the development of the Company's networks include
amounts  incurred  related to network  engineering,  design and construction and
capitalized  interest.  Capitalized  interest related to the construction of the
networks  for the six  months  ended  June 30,  1998 and 1999  amounted  to $1.4
million and $1.3 million, respectively.


4. INTANGIBLE ASSETS

      Intangible assets are comprised of the following (in thousands):

                                                       DECEMBER 31,   JUNE 30,
                                                           1998         1999
                                                       ----------    ---------
Franchise costs....................................       $1,690       $1,281
Authorizations and rights-of-way...................        1,455        1,326
Building access agreements and other...............        1,062          736
                                                       ----------    ---------
                                                           4,207        3,343
Less accumulated amortization......................       (1,378)      (1,201)
                                                       ----------    ---------
                                                          $2,829       $2,142
                                                       ==========    =========


5.    DUE FROM AFFILIATE

     On July 1, 1999, the Company  acquired all of the  membership  interests of
KMC Services LLC from Harold N. Kamine,  the Chairman of our Board of Directors,
for nominal  consideration.  KMC Services LLC was formed to provide  services to
the  Company  and its  customers,  initially  offering  a  leasing  program  for
equipment  physically  installed at a customer's  premises.  The acquisition was
accounted for as a combination of entities under common control,  and no changes
were  made  to  the  historical   cost  basis  of  KMC  Services  LLC's  assets.
Accordingly, during the second quarter of 1999, the Company reduced the carrying
value of its $709,000 loan  receivable  from KMC Services LLC to an amount equal
to the value of KMC Services LLC's net assets at the acquisition date.


6.    ACCRUED EXPENSES

     Accrued expenses are comprised of the following (in thousands):

                                            DECEMBER 31,     JUNE 30,
                                                1998          1999
                                            ------------   -----------

Accrued compensation.....................   $  4,138       $   6,387
Deferred revenue.........................      1,187           4,109
Accrued costs related to financing
  activities.............................        380           9,210
Accrued interest payable.................        162           6,719
Accrued cost of sales....................        565           2,232
Other accrued expenses...................      3,942           4,952
                                            ---------      ----------
                                            $ 10,374       $  33,609
                                            =========      ==========


                                       6
<PAGE>

7.  LUCENT LOAN AND SECURITY AGREEMENT

      KMC Telecom III entered  into a Loan and Security  Agreement  (the "Lucent
Facility") dated February 4, 1999 with Lucent Technologies Inc. ("Lucent") which
provides  for  borrowings  to  be  used  to  fund  the  acquisition  of  certain
telecommunications  equipment and related expenses. The Lucent Facility provides
for an  aggregate  commitment  of up to $600  million,  of which $250 million is
currently  available to purchase Lucent products.  Further,  up to an additional
$350 million will be available upon (a) additional lenders  participating in the
Lucent Facility and making  commitments to make loans so that Lucent's aggregate
commitment does not exceed $250 million and (b) the Company  satisfying  certain
other  requirements,  the most  significant of which is KMC Holdings raising and
contributing  at least $300  million in high  yield debt or equity  (other  than
disqualified  stock) to KMC Telecom  III.  The Lucent  Facility  places  certain
restrictions  upon KMC Telecom  III's ability to purchase  non-Lucent  equipment
with proceeds from such facility. At June 30, 1999, no amounts had been borrowed
under the Lucent Facility.

      Interest on borrowings under the Lucent Facility is charged, at the option
of KMC  Telecom  III,  at a floating  rate of LIBOR plus the  "Applicable  LIBOR
Margin",  or at an alternative  base rate plus the "Applicable Base Rate Margin"
(as defined).  Such margins will be increased by 0.25% until KMC Telecom III and
its subsidiaries have completed systems in fourteen markets.  If KMC Telecom III
defaults on any payment due under the Lucent  Facility,  the interest  rate will
increase by four percentage  points.  If any other event of default shall occur,
the interest rate will be increased by two percentage  points.  Interest on each
LIBOR  loan is  payable  on each LIBOR  interest  payment  date in  arrears  and
interest on each base rate loan is payable quarterly in arrears. KMC Telecom III
must pay an annual  commitment fee on the unused portion of the Lucent  Facility
of 1.25%.

      Loans  borrowed under the Lucent  Facility  amortize in amounts based upon
the following  percentages of the aggregate  amount of the loans drawn under the
Lucent Facility:

                  PAYMENT DATES                      AMORTIZATION
          -------------------------------           ---------------

          May 1, 2002 - February 1, 2003            2.5% per quarter
          May 1, 2003 - February 1, 2006            5.0% per quarter
          May 1, 2006 - February 1, 2007            7.5% per quarter

      KMC Holdings has  unconditionally  guaranteed  the repayment of up to $250
million  under the  Lucent  Facility  when such  repayment  is due,  whether  at
maturity, upon acceleration, or otherwise. KMC Telecom III Holdings, Inc., which
owns the shares of KMC  Telecom III and is  wholly-owned  by KMC  Holdings,  has
pledged the shares of KMC Telecom III to Lucent to collateralize its obligations
under the guaranty.  In addition,  KMC Telecom III has pledged all of its assets
to Lucent.

      The  Lucent  Facility  contains  a  number  of  affirmative  and  negative
covenants  including,  among others,  covenants  restricting  the ability of KMC
Telecom III to consolidate or merge with any person, sell or lease assets not in
the ordinary course of business, sell or enter into any long term leases of dark
fiber,  redeem  stock,  pay  dividends  or make any  other  payments  (including
payments  of   principal  or  interest  on  loans)  to  KMC   Holdings,   create
subsidiaries, transfer any permits or licenses, or incur additional indebtedness
or act as  guarantor  for the  debt of any  other  person,  subject  to  certain
conditions.

      KMC Telecom III is required  to comply with  certain  financial  tests and
maintain certain  financial  ratios,  including,  among others, a ratio of total
debt to contributed capital, certain minimum revenues, maximum EBITDA losses and
minimum EBITDA, maximum capital expenditures and minimum access lines, a maximum
total  leverage  ratio, a minimum debt service  coverage  ratio, a minimum fixed
charge coverage ratio and a maximum  consolidated  leverage ratio. The covenants

                                       7
<PAGE>

become more  restrictive upon the earlier of (i) July 1, 2002 and (ii) after KMC
Telecom III achieves positive EBITDA for two consecutive fiscal quarters.

      Failure to satisfy any of the financial covenants will constitute an event
of default under the Lucent  Facility,  permitting  the lenders to terminate the
commitment and/or  accelerate  payment of outstanding  indebtedness.  The Lucent
Facility also includes other  customary  events of default,  including,  without
limitation,   a   cross-default   to  other  material   indebtedness,   material
undischarged  judgments,  bankruptcy,  loss of a material  franchise or material
license,  breach of representations  and warranties,  a material adverse change,
and the occurrence of a change of control.


8.  PREFERRED STOCK AND WARRANT ISSUANCES

SERIES E PREFERRED STOCK

      On February 4, 1999,  the Company  issued 25,000 shares of Series E Senior
Redeemable,  Exchangeable,  PIK Preferred Stock (the "Series E Preferred Stock")
to Newcourt  Commercial Finance  Corporation  ("Newcourt  Finance"),  generating
aggregate gross proceeds of $22.9 million. On April 30, 1999, the Company issued
an  additional  35,000 of Series E Preferred  Stock for gross  proceeds of $25.9
million. The Series E Preferred Stock has a liquidation preference of $1,000 per
share  and an  annual  dividend  equal to 14.5% of the  liquidation  preference,
payable quarterly.  On or before January 15, 2004, the Company may pay dividends
in cash or in  additional  fully  paid  and  nonassessable  shares  of  Series E
Preferred Stock. After January 15, 2004, dividends must be paid in cash, subject
to certain  conditions.  Unpaid  dividends  accrue at the  dividend  rate of the
Series E Preferred Stock,  compounded quarterly.  On April 15, 1999, the Company
issued 695 shares of Series E Preferred  Stock to pay the dividends due for such
period.

      The Series E Preferred Stock must be redeemed on February 1, 2011, subject
to the legal availability of funds therefor,  at a redemption price,  payable in
cash, equal to the liquidation  preference  thereof on the redemption date, plus
all accumulated and unpaid dividends to the date of redemption.  After April 15,
2004, the Series E Preferred Stock may be redeemed,  in whole or in part, at the
option of the Company,  at a redemption  price equal to 110% of the  liquidation
preference of the Series E Preferred Stock plus all accrued and unpaid dividends
to the date of redemption.  The redemption  price declines to an amount equal to
100% of the liquidation preference as of April 15, 2007.

      In  addition,  on or prior to April 15,  2002,  the  Company  may,  at its
option,  redeem up to 35% of the  aggregate  liquidation  preference of Series E
Preferred  Stock with the proceeds of sales of its capital stock at a redemption
price equal to 110% of the  liquidation  preference on the redemption  date plus
accrued and unpaid dividends.

      The  holders of Series E  Preferred  Stock have  voting  rights in certain
circumstances.  Upon the occurrence of a change of control,  the Company will be
required to make an offer to repurchase the Series E Preferred Stock for cash at
a purchase price of 101% of the liquidation  preference  thereof,  together with
all accumulated and unpaid dividends to the date of purchase.

      The Series E Preferred Stock is not  convertible.  The Company may, at the
sole option of the Board of Directors (out of funds legally available), exchange
all,  but not less than all, of the Series E Preferred  Stock then  outstanding,
including  any  shares  of  Series E  Preferred  Stock  issued  as  payment  for
dividends,   for  a  new  series  of  subordinated   debentures  (the  "Exchange
Debentures") issued pursuant to an exchange debenture indenture.  The holders of
Series  E  Preferred  Stock  are  entitled  to  receive  on the date of any such
exchange,  Exchange Debentures having an aggregate principal amount equal to (i)


                                       8
<PAGE>

the total of the  liquidation  preference  for each share of Series E  Preferred
Stock  exchanged,  plus (ii) an amount equal to all accrued but unpaid dividends
payable on such share.

SERIES F PREFERRED STOCK

      On February 4, 1999,  the Company  issued 40,000 shares of Series F Senior
Redeemable,  Exchangeable,  PIK Preferred Stock (the "Series F Preferred Stock")
to Lucent and Newcourt  Finance,  generating  aggregate  gross proceeds of $38.9
million. The Series F Preferred Stock has a liquidation preference of $1,000 per
share  and an  annual  dividend  equal to 14.5% of the  liquidation  preference,
payable quarterly.  The Company may pay dividends in cash or in additional fully
paid and  nonassessable  shares of Series F Preferred  Stock. On April 15, 1999,
the Company issued 1,112 shares of Series F Preferred Stock to pay the dividends
due for such period.

      The Series F Preferred  Stock may be redeemed at any time,  in whole or in
part, at the option of the Company,  at a redemption  price equal to 110% of the
liquidation  preference on the  redemption  date plus an amount in cash equal to
all  accrued  and unpaid  dividends  thereon to the  redemption  date.  Upon the
occurrence of a change of control, the Company will be required to make an offer
to purchase the Series F Preferred Stock for cash at a purchase price of 101% of
the  liquidation  preference  thereof,  together with all accumulated and unpaid
dividends to the date of purchase.

      The holders of Series F Preferred  Stock have voting  rights under certain
circumstances.

                Upon the  earlier  of (i) the date that is sixty  days after the
date on which the Company closes an  underwritten  primary  offering of at least
$200  million  of  its  Common  Stock,  pursuant  to an  effective  registration
statement  under the Securities  Act or (ii) February 4, 2001,  any  outstanding
Series F  Preferred  Stock will  automatically  convert  into Series E Preferred
Stock, on a one for one basis.

      The  Company  may, at the sole  option of the Board of  Directors  (out of
funds legally  available),  exchange all, but not less than all, of the Series F
Preferred  Stock then  outstanding,  including  any shares of Series F Preferred
Stock issued as payment for dividends,  for Exchange Debentures.  The holders of
Series  F  Preferred  Stock  are  entitled  to  receive  on the date of any such
exchange,  Exchange Debentures having an aggregate principal amount equal to (i)
the total of the  liquidation  preference  for each share of Series F  Preferred
Stock  exchanged,  plus (ii) an amount equal to all accrued but unpaid dividends
payable on such share.

WARRANTS

      In  connection  with  the  February  4,  1999  issuances  of the  Series E
Preferred  Stock and the Series F  Preferred  Stock,  warrants  to  purchase  an
aggregate  of 24,660  shares of Common  Stock were sold to Newcourt  Finance and
Lucent.  The  aggregate  gross  proceeds  from the sale of  these  warrants  was
approximately  $3.2 million.  These  warrants,  at an exercise price of $.01 per
share, are exercisable from February 4, 2000 through February 1, 2009.

      In addition,  the Company also delivered to the Warrant Agent certificates
representing  warrants to purchase an aggregate of an additional  107,228 shares
of  Common  Stock  at an  exercise  price  of $.01  per  share  (the  "Springing
Warrants").  The Springing  Warrants may become issuable under the circumstances
described in the following paragraph.

      If the  Company  fails to redeem  all shares of Series F  Preferred  Stock
prior to the date (the "Springing Warrant Date") which is the earlier of (i) the
date  that is  sixty  days  after  the  date on  which  the  Company  closes  an
underwritten  primary  offering  of at least $200  million  of its Common  Stock
pursuant to an effective registration statement under the Securities Act or (ii)


                                       9
<PAGE>

February  4,  2001,  the  Warrant  Agent is  authorized  to issue the  Springing
Warrants to the Eligible  Holders (as defined in the warrant  agreement)  of the
Series E and Series F Preferred Stock. In the event the Company has redeemed all
outstanding  shares of Series F Preferred  Stock prior to the Springing  Warrant
Date,  the  Springing  Warrants  will not be issued and the  Warrant  Agent will
return the certificates to the Company.  To the extent the Company exercises its
option to exchange all of the Series F Preferred  Stock for Exchange  Debentures
prior to the  Springing  Warrant Date,  the  Springing  Warrants will not become
issuable.  Therefore,  as the  future  issuance  of the  Springing  Warrants  is
entirely  within the control of the Company and the likelihood of their issuance
is deemed to be remote, no value has been ascribed to the Springing Warrants.

      In connection with the April 30, 1999 issuance of additional shares of the
Series E Preferred Stock,  warrants to purchase an aggregate of 60,353 shares of
Common  Stock were issued to Newcourt  Finance and First  Union.  The  aggregate
gross proceeds from the sale of these warrants was  approximately  $9.1 million.
These warrants,  at an exercise price of $.01 per share,  are  exercisable  from
February 4, 2000 through February 1, 2009.


9. COMMITMENTS AND CONTINGENCIES

PURCHASE COMMITMENTS

      As of June 30, 1999, the Company has outstanding  commitments  aggregating
approximately   $114.0  million  related  to  purchases  of   telecommunications
equipment and fiber optic cable and its  obligations  under its agreements  with
certain suppliers.

REDEMPTION RIGHTS

      Pursuant  to  a   stockholders   agreement,   certain  of  the   Company's
stockholders  and warrant  holders have "put rights"  entitling them to have the
Company repurchase their preferred and common shares and redeemable common stock
warrants for the fair value of such securities if no Liquidity Event (defined as
(i) an initial public offering with gross proceeds of at least $40 million, (ii)
the sale of substantially all of the stock or assets of the Company or (iii) the
merger or consolidation of the Company with one or more other  corporations) has
taken  place by the later of (x) October 22, 2003 or (y) 90 days after the final
maturity date of the Senior  Discount Notes.  The  restrictive  covenants of the
Senior Discount Notes limit the Company's ability to repurchase such securities.
All of the  securities  subject to such "put rights" are presented as redeemable
equity in the accompanying balance sheets.

      The redeemable  preferred  stock,  redeemable  common stock and redeemable
common stock warrants which are subject to the stockholders  agreement are being
accreted up to their fair market values from their respective  issuance dates to
their earliest  potential  redemption date (October 22, 2003). At June 30, 1999,
the aggregate  redemption value of the redeemable equity was approximately  $280
million,  reflecting  per share  redemption  amounts  of $1,090 for the Series A
Preferred  Stock,  $429  for the  Series  C  Preferred  Stock  and  $225 for the
redeemable common stock and redeemable common stock warrants.

ARBITRATION AWARD

      During the second  quarter of 1999,  the Company  recorded a $4.3  million
charge to other expense in connection with an unfavorable arbitration award. The
net amount due under the terms of the award was paid in full in June 1999.


                                       10
<PAGE>





10. NET LOSS PER COMMON SHARE

      The  following  table  sets forth the  computation  of net loss per common
share-basic (in thousands, except share and per share amounts):

<TABLE>
<CAPTION>
                                         THREE MONTHS ENDED            SIX MONTHS ENDED
                                              JUNE 30,                     JUNE 30,
                                       -----------------------     -----------------------
                                          1998        1999            1998        1999
                                       ----------- -----------     ----------- -----------
<S>                                    <C>         <C>             <C>         <C>
Numerator:
  Net loss..........................   $ (20,633)  $ (63,801)      $ (33,597)  $ (103,160)

Dividends and accretion on
    redeemable preferred stock......      (6,687)    (31,971)        (10,040)     (43,415)
                                       ----------- -----------     ----------- -----------
  Numerator for net loss per common
    share - basic...................   $ (27,320)  $  (95,772)      $ (43,637)  $(146,575)
                                       =========== ===========     =========== ===========

Denominator:
  Denominator for net loss per
   common share - weighted average
   number of common shares
   outstanding......................      837,876     852,676         827,827     850,632
                                        ========== ===========     =========== ===========

Net loss per common share - basic...   $   (32.61) $  (112.32)     $   (52.71) $  (172.31)
                                       =========== ===========     =========== ===========
</TABLE>


     Options and warrants to purchase an aggregate of 251,885 and 483,273 shares
of common stock were outstanding as of June 30, 1998 and 1999, respectively, but
a computation  of diluted net loss per common share has not been  presented,  as
the effect would be anti-dilutive.

                                       11
<PAGE>


ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
        CONDITION AND RESULTS OF OPERATIONS
        -----------------------------------

      THIS FORM 10-Q CONTAINS FORWARD-LOOKING STATEMENTS WHICH INVOLVE RISKS AND
UNCERTAINTIES.  THE COMPANY'S ACTUAL RESULTS MAY DIFFER  SIGNIFICANTLY  FROM THE
RESULTS DISCUSSED IN THE FORWARD-LOOKING  STATEMENTS.  THE FOLLOWING  DISCUSSION
SHOULD  BE  READ  IN  CONJUNCTION  WITH  THE  UNAUDITED  CONDENSED  CONSOLIDATED
FINANCIAL  STATEMENTS,  INCLUDING THE NOTES THERETO,  INCLUDED ELSEWHERE IN THIS
FORM 10-Q.


RESULTS OF OPERATIONS

As a result of the development and rapid growth of the Company's business during
the periods presented, the period-to-period comparisons of the Company's results
of operations are not necessarily meaningful and should not be relied upon as an
indication of future performance.

                 THREE MONTHS ENDED JUNE 30, 1999 COMPARED TO
                       THREE MONTHS ENDED JUNE 30, 1998

      REVENUE.  Revenue  increased  from $4.5 million for the three months ended
June 30, 1998 (the "1998 Second  Quarter") to $15.6 million for the three months
ended June 30, 1999 (the "1999  Second  Quarter").  This  increase is  primarily
attributable  to the fact that we derived  revenues  from 23 markets  during the
1999 Second  Quarter  compared to 8 markets during the 1998 Second  Quarter.  In
addition,  each of our systems  that  generated  revenue  during the 1998 Second
Quarter generated higher revenue during the 1999 Second Quarter. Revenue for the
1998 Second  Quarter  and 1999 Second  Quarter  included  $3.1  million and $6.3
million,  respectively,  of revenue derived from resale of switched services and
an aggregate of $1.4 million and $9.3 million (including $2.8 million of revenue
related  to   reciprocal   compensation   during  the  1999   Second   Quarter),
respectively,  of revenue derived from on-net special  access,  private line and
switched  services.   Although  incumbent  local  exchange  carriers,   such  as
BellSouth,  have  generally  withheld  payments  of amounts  due for  reciprocal
compensation  to  competitive  local  exchange  carriers such as the Company for
calls to internet service  providers and disputed the entitlement of competitive
local  exchange  carriers to  reciprocal  compensation  for such calls,  we have
determined to recognize  amounts due to us for reciprocal  compensation for such
calls because we have concluded,  based upon all of the facts and circumstances,
including  numerous state public service  commission and state and federal court
decisions  upholding   competitive  local  exchange  carriers'   entitlement  to
reciprocal  compensation  for such calls,  that  realization  of such amounts is
reasonably assured.

      NETWORK  OPERATING  COSTS.  Network  operating  costs  increased from $8.1
million in the 1998 Second Quarter to $24.4 million in the 1999 Second  Quarter.
This  increase of $16.3  million was due primarily to the increase in the number
of markets in which we  operated  in the 1999  Second  Quarter  and the  related
increases of $4.6 million in costs associated with providing resale services and
leasing  unbundled  network element  services,  $4.5 million in personnel costs,
$1.9 million in contracted network support costs, $1.7 million in consultant and
professional  services  related  costs,  $1.0  million  in  reciprocal  expense,
$600,000 in facility costs, and $2.0 million in other direct operating costs.

      Costs associated with providing on-net switched services were greater than
revenue  generated from on-net switched  services because we hired personnel and
staffed  local offices  prior to  generating  revenue and  obtaining  sufficient
revenue volume to cover such fixed operating costs.

      Costs  associated  with  providing  resale  services  are greater than the
revenues  generated from these services because of narrow discounts  provided by


                                       12
<PAGE>

the incumbent local exchange carriers and because initial  installation  charges
by the incumbent local exchange  carrier to us are greater than our installation
charges to our customers. Initially, resale has been used as an interim strategy
for us to  create a  backlog  of  customers  to be  transitioned  to our  on-net
switched facilities as our own switches become commercially operational.  We now
have  switches in commercial  operation in 23 markets.  We are in the process of
transitioning the majority of our resale customers to on-net switched  services,
but this can be a time-consuming task.

      SELLING,  GENERAL  AND  ADMINISTRATIVE  EXPENSES.   Selling,  general  and
administrative  expenses increased from $5.7 million for the 1998 Second Quarter
to $14.7  million for the 1999 Second  Quarter.  This  increase of $9.0  million
resulted  primarily  from  increases of $5.5 million in  personnel  costs,  $1.3
million in professional costs (consisting primarily of legal costs), $200,000 in
advertising  costs,  and $1.0  million in travel  related  expenses,  along with
increases in other marketing and general and  administrative  costs  aggregating
approximately $1.0 million.

      STOCK OPTION COMPENSATION  EXPENSE.  Stock option compensation  expense, a
non-cash  charge,  increased  from $5.1  million for the 1998 Second  Quarter to
$16.3 million for the 1999 Second Quarter. This increase primarily resulted from
an increase in the estimated fair value of the Company's Common Stock as well as
the grant of additional stock options during the period.

      DEPRECIATION  AND  AMORTIZATION.  Depreciation  and  amortization  expense
increased  from $1.1 million for the 1998 Second Quarter to $6.1 million for the
1999 Second Quarter  primarily as a result of  depreciation  expense  associated
with the  greater  number of networks in  commercial  operation  during the 1999
Second Quarter.

      OTHER EXPENSE. During the 1999 Second Quarter, the Company recorded a $4.3
million charge to other expense in connection  with an  unfavorable  arbitration
award.  The net amount due under the terms of the award was paid in full in June
1999.

      INTEREST EXPENSE. Interest expense increased from $7.3 million in the 1998
Second  Quarter  to $15.7  million  in the 1999  Second  Quarter.  The  increase
resulted  primarily from the issuance of the Senior Notes during the 1999 Second
Quarter,  additional  accretion  on the Senior  Discount  Notes,  and  increased
interest  charges related to higher  borrowings  under the Senior Secured Credit
Facility.  The  Company  capitalized  interest  related to network  construction
projects of $800,000 during the 1998 Second Quarter and $700,000 during the 1999
Second Quarter.

      NET LOSS.  For the reasons  stated above,  net loss  increased  from $20.6
million  for the 1998  Second  Quarter  to  $63.8  million  for the 1999  Second
Quarter.

                  SIX MONTHS ENDED JUNE 30, 1999 COMPARED TO
                        SIX MONTHS ENDED JUNE 30, 1998

      REVENUE. Revenue increased from $7.3 million for the six months ended June
30, 1998 (the "1998 Six Months") to $26.7  million for the six months ended June
30, 1999 (the "1999 Six Months"). This increase is primarily attributable to the
fact that we derived revenue from 23 markets during the 1999 Six Months compared
to 8 markets during the 1998 Six Months.  In addition,  each of our systems that
generated revenue during the 1998 Six Months generated higher revenue during the
1999 Six Months.  Revenue  for the 1998 Six Months and 1999 Six Months  included
$5.2 million and $12.5 million,  respectively, of revenue derived from resale of
switched services and an aggregate of $2.1 million and $14.2 million  (including
$4.6 million of revenue related to reciprocal  compensation  during the 1999 Six
Months),  respectively,  of revenue derived from on-net special access,  private
line and switched services.  Although incumbent local exchange carriers, such as
BellSouth,  have  generally  withheld  payments  of amounts  due for  reciprocal
compensation  to  competitive  local  exchange  carriers such as the Company for


                                       13
<PAGE>

calls to internet service  providers and disputed the entitlement of competitive
local  exchange  carriers to  reciprocal  compensation  for such calls,  we have
determined to recognize  amounts due to us for reciprocal  compensation for such
calls because we have concluded,  based upon all of the facts and circumstances,
including  numerous state public service  commission and state and federal court
decisions  upholding   competitive  local  exchange  carriers'   entitlement  to
reciprocal  compensation  for such calls,  that  realization  of such amounts is
reasonably assured.

      NETWORK  OPERATING  COSTS.  Network  operating  costs increased from $13.9
million in the 1998 Six Months to $44.1  million  in the 1999 Six  Months.  This
increase of $30.2  million was due  primarily  to the  increase in the number of
markets in which we operated in the 1999 Six Months and the related increases of
$9.0 million in costs  associated  with  providing  resale  services and leasing
unbundled  network  element  services,  $8.6  million in personnel  costs,  $3.5
million in contracted  network  support  costs,  $2.6 million in consultant  and
professional  services related costs, $1.3 million in reciprocal  expense,  $1.1
million in facility costs, and $4.1 million in other direct operating costs.

      SELLING,   GENERAL  AND  ADMINISTRATIVE  EXPENSES  Selling,   general  and
administrative  expenses  increased from $9.2 million for the 1998 Six Months to
$26.7 million for the 1999 Six Months.  This increase of $17.5 million  resulted
primarily  from  increases of $9.3 million in personnel  costs,  $2.8 million in
professional  costs  (consisting  primarily  of legal  costs),  $2.3  million in
advertising  costs,  and $1.6  million in travel  related  expenses,  along with
increases in other marketing and general and  administrative  costs  aggregating
approximately $1.5 million.

      STOCK OPTION COMPENSATION  EXPENSE.  Stock option compensation  expense, a
non-cash  charge,  increased  from $6.2 million for the 1998 Six Months to $20.2
million  for the 1999 Six  Months.  This  increase  primarily  resulted  from an
increase in the estimated  fair value of the  Company's  Common Stock as well as
the grant of additional stock options during the period.

      DEPRECIATION  AND  AMORTIZATION.  Depreciation  and  amortization  expense
increased  from $2.1  million  for the 1998 Six Months to $11.6  million for the
1999 Six Months  primarily as a result of depreciation  expense  associated with
the  greater  number of  networks in  commercial  operation  during the 1999 Six
Months.

      OTHER EXPENSE. During the 1999 Second Quarter, the Company recorded a $4.3
million charge to other expense in connection  with an  unfavorable  arbitration
award.  The net amount due under the terms of the award was paid in full in June
1999.

      INTEREST  EXPENSE.  Interest  expense  increased from $14.6 million in the
1998 Six Months to $26.0 million in the 1999 Six Months.  The increase  resulted
primarily from the issuance of the Senior Notes during the 1999 Second  Quarter,
additional  accretion  on the Senior  Discount  Notes,  and  increased  interest
charges related to higher  borrowings  under the Senior Secured Credit Facility.
The Company  capitalized  interest related to network  construction  projects of
$1.4 million during the 1998 Six Months and $1.3 during the 1999 Six Months.

      NET LOSS.  For the reasons  stated above,  net loss  increased  from $33.6
million for the 1998 Six Months to $103.2 million for the 1999 Six Months.

LIQUIDITY AND CAPITAL RESOURCES

      We have incurred  significant  operating and net losses as a result of the
development  and  operation  of our  networks.  We expect  that such losses will
continue as we emphasize  the  development,  construction  and  expansion of our
networks and build our customer  base.  As a result,  there will not be any cash
provided by operations in the near future and we will need to fund the expansion


                                       14
<PAGE>

of our networks.  We have financed our operating losses and capital expenditures
with  equity  invested  by our  founders,  preferred  stock  placements,  credit
facility  borrowings  and the 12 1/2% Senior  Discount  Notes and 13 1/2% Senior
Notes.

      In February  1999, we issued PIK Preferred  Stock and warrants to purchase
common stock for aggregate gross proceeds of $65.0 million to two purchasers. In
April 1999, we issued  additional  shares of PIK Preferred Stock and warrants to
purchase  common stock to one additional  purchaser for aggregate gross proceeds
of $35.0 million.

      In February  1999, our  subsidiary  which owns the 14 additional  networks
currently under  development,  entered into a secured vendor financing  facility
with Lucent Technologies Inc. Under this Lucent Facility, our subsidiary will be
permitted to borrow, subject to certain conditions, up to an aggregate of $600.0
million,   primarily  for  the  purchase  from  Lucent  of  switches  and  other
telecommunications equipment.  Currently, $250.0 million is available under this
facility.  The balance of $350.0  million  will become  available  only upon (a)
additional  lenders agreeing to participate in the facility so that Lucent's own
aggregate  commitment  does  not  exceed  $250.0  million  and (b)  the  Company
satisfying  certain other  requirements,  the most  significant  of which is the
Company  raising,  and  contributing to the subsidiary,  at least $300.0 million
from the sale of high yield debt or equity.  As of June 30, 1999 the Company had
no borrowings outstanding under this facility.

      On May 24, 1999, we issued $275.0 million in aggregate principal amount of
13 1/2% Senior Notes due 2009.  Approximately $104.1 million of the net proceeds
of this offering were used to purchase a portfolio of U.S.  treasury  securities
that have been pledged to secure the first six  scheduled  interest  payments on
these notes.

      At  June  30,  1999,  the  Company  had  $125.0  million  of  indebtedness
outstanding under the Senior Secured Credit Facility,  and had $125.0 million in
borrowing capacity  available under the Senior Secured Credit Facility,  subject
to certain conditions.

      Net cash  provided by  financing  activities  from  borrowings  and equity
issuances  was $332.1  million for the six months ended June 30,  1999.  Our net
cash used in operating and investing  activities  was $165.2 million for the six
months ended June 30, 1999.

      We made  capital  expenditures  of $170.7  million in the six months ended
June 30, 1999. We currently  plan to make  additional  capital  expenditures  of
approximately $153.0 million during the remainder of 1999. Continued significant
capital  expenditures are expected to be made thereafter.  The majority of these
expenditures is expected to be made for network construction and the purchase of
switches and related  equipment to facilitate  the offering of our services.  In
addition,  we expect to continue to incur  operating  losses while we expand our
business and build our customer base. Actual capital  expenditures and operating
losses will depend on numerous factors, including the nature of future expansion
and acquisition opportunities and factors beyond our control, including economic
conditions,   competition,  regulatory  developments  and  the  availability  of
capital.

      At June 30,  1999,  the Company had  outstanding  commitments  aggregating
approximately  $114.0  million  related to the purchase of fiber optic cable and
telecommunications equipment as well as engineering services,  principally under
the Company's agreements with Lucent Technologies Inc.

      We believe that our cash, investments held for future capital expenditures
and borrowings available under our Senior Secured Credit Facility and the Lucent
Facility, together with the net proceeds from our April 1999 issuance of our PIK
Preferred  Stock and the May 1999  offering of our 13 1/2% Senior  Notes will be
sufficient  to meet our  liquidity  needs for our initial 23 networks and the 14
additional  networks currently under development and anticipated to be completed
over the next 12  months,  although  we can give no  assurance  in this  regard.
Thereafter we will require additional financing.  However, in the event that our
plans change,  the assumptions upon which our plans are based prove  inaccurate,
we  expand  or  accelerate  our  business  plan or we  determine  to  consummate


                                       15
<PAGE>

acquisitions,  the foregoing sources of funds may prove insufficient to complete
all of the networks,  and we may be required to seek additional financing sooner
than we currently expect.  Additional sources of financing may include public or
private equity or debt financings by the Company,  capitalized  leases and other
financing arrangements.

      We can give no assurance that additional financing will be available to us
or, if  available,  that it can be obtained on a timely basis and on  acceptable
terms. Failure to obtain such financing could result in the delay or abandonment
of some or all of our development and expansion plans and  expenditures.  Such a
failure could also limit our ability to make principal and interest  payments on
our indebtedness  and meet our dividend and redemption  obligations with respect
to our  preferred  stock.  The  Company has no working  capital or other  credit
facility  under  which it may  borrow  for  working  capital  and other  general
purposes.  We can give no assurance that such financing will be available to the
Company in the future or that, if such  financing  were  available,  it would be
available on terms and conditions acceptable to the Company.



YEAR 2000 COMPLIANCE

               Similar to all businesses, we may be affected by the inability of
certain computer software to distinguish  between the years 1900 and 2000 due to
a  commonly-used  programming  convention.  Unless such programs are modified or
replaced  prior to January 1, 2000,  calculations  based on date  arithmetic  or
logical operations performed by such programs may be incorrect. In addition, the
Senior Secured Credit  Facility and the Lucent Facility impose certain Year 2000
compliance obligations on the Company.

      Management's  plan to address the effect of the Year 2000 issue focuses on
the following  areas:  applications  systems  (including  our billing system and
financial  software),  infrastructure  (including personal computers and servers
used throughout the Company),  and other third party business partners,  vendors
and  suppliers.  Management's  analysis  and review of these areas is  comprised
primarily of the following phases: developing an inventory of hardware, software
and  embedded  chips;  assessing  the  degree to which  each  area is  currently
compliant  with Year 2000  requirements;  performing  renovations,  repairs  and
replacements as needed to attain compliance;  testing to ensure compliance; and,
developing  a  contingency  plan for each area if our initial  efforts to attain
compliance are either unsuccessful or untimely.

      Management  completed the inventory and  assessment  phases of the project
during the fourth quarter of 1998. The renovation,  repair and replacement phase
and the testing  phase have  commenced;  however,  we expect to  continue  these
phases throughout 1999.

      Further,  we are  currently  in the  process of  implementing  new billing
software  systems,  operational  software  systems and  financial  and personnel
software  systems.  Although  these  implementations  were made necessary by the
expansion of our  business  and were not  directly  related to Year 2000 issues,
they have  enabled us to  utilize  new  software  for these  purposes  which the
respective suppliers have certified as Year 2000 compliant.

      Costs  incurred  to date  have  primarily  consisted  of  labor  from  the
redeployment  of existing  information  services and operational  resources.  We
expect to spend  approximately  $150,000 for these Year 2000 compliance  efforts
which will be  expensed as  incurred.  This amount does not include the costs of
the new billing  software,  operational  software and  financial  and  personnel
software  systems which we are  implementing as a result of the expansion of our
business.

      If the software applications of the local exchange carriers, long distance
carriers  or  others on whose  services  we  depend  or with  which our  systems


                                       16
<PAGE>

interact are not Year 2000  compliant,  it could affect our systems  which could
have a material adverse effect on our business,  financial condition and results
of operations.

      We have formed a contingency team to develop a work plan in the event that
certain  programs and hardware are not fully  compliant and  operational  before
January 1, 2000.  The costs  associated  with this  effort are  currently  being
evaluated and cannot yet be  determined.  In the event that certain,  or all, of
the contingency plans are deployed,  we will incur additional costs; however, as
contingency  plans are not yet  developed,  we cannot  determine  these costs at
present.

      Although we do not presently  anticipate a material business  interruption
as a result of the Year 2000 issue,  the worst case  scenario if all of our Year
2000  efforts  fail would  result in a daily loss of revenues  of  approximately
$200,000 calculated based upon our current revenues.


ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
        ----------------------------------------------------------

      Market risks relating to the Company's  operations  result  primarily from
changes in interest rates. The substantial  majority of the Company's  long-term
debt bears interest at a fixed rate. However, the fair market value of the fixed
rate debt is sensitive to changes in interest  rates.  The Company is subject to
the risk that market  interest  rates will decline and the interest  expense due
under the fixed rate debt will exceed the  amounts  due based on current  market
rates.  Under its current  policies,  the Company  does not utilize any interest
rate derivative instruments to manage its exposure to interest rate changes.

      The following table provides  information about the Company's  significant
financial  instruments  that are  sensitive  to  changes in  interest  rates (in
millions):

<TABLE>
<CAPTION>

                                  Fair Value on                Future Principal Payments
                                  June 30, 1999    1999    2000    2001   2002   2003   Thereafter   Total
                                 -------------------------------------------------------------------------
<S>                                <C>              <C>    <C>     <C>   <C>    <C>      <C>      <C>
Long-Term Debt

Fixed Rate:

Senior Discount Notes,
  interest payable at 12 1/2%,     $   271.8        --      --      --     --     --     $ 292.3   $292.3
  maturing 2008

Senior Notes,
  interest payable at
  13 1/2%, maturing 2009               275.0        --      --      --     --     --       275.0    275.0


Variable rate:

Senior Secured Credit Facility,
  interest variable at LIBOR plus 3
  3/4 % (8.81% at June 30,
  1999) (a)                            125.0        --      --      --    0.6    0.8       123.6    125.0
                                   ----------------------------------------------------------------------

Total                              $   671.8        --      --      --    $.6    0.8      $690.9   $692.3
                                   ======================================================================
</TABLE>

(a) Interest rate is based on a variable rate, which at the Company's option, is
determined  by either a base rate or LIBOR,  plus,  in each  case,  a  specified
margin.


                                       17
<PAGE>


                         PART II - OTHER INFORMATION


ITEM 1. LEGAL PROCEEDINGS.
        -----------------

      In ITEM 3 - LEGAL  PROCEEDINGS  of its Annual Report to the  Commission on
Form  10-K  for the year  ended  December  31,  1998,  the  Company  included  a
description  of an  arbitration  proceeding  between its  subsidiary KMC Telecom
Inc., and Wang Laboratories, Inc. (as successor to I-NET, Inc.). On June 1, 1999
the  American  Arbitration  Association  transmitted  to the parties an Award of
Arbitration  in the  proceeding.  The award provides that KMC Telecom Inc. shall
pay to Wang  Laboratories,  Inc. the sum of  approximately  $4.8 million  (which
amount  includes  pre-award  interest)  with  interest  thereon from the date of
service of the award to the date of payment.  KMC Telecom  Inc.'s  counterclaims
were dismissed. The Company paid the award in full during June 1999.

ITEM 2. CHANGES IN SECURITIES AND USE OF PROCEEDS.
        -----------------------------------------

     (a)  Not Applicable.

     (b)  Not Applicable.

     (c) On April 30,  1999,  we issued  units (the  "Units")  consisting  of an
aggregate  of  35,000  shares of Series E Senior  Redeemable,  Exchangeable  PIK
Preferred Stock,  par value $.01 per share (the "Series E Preferred  Stock") and
an aggregate of 127,932  warrants (the  "Warrants"),  each to purchase  0.471756
shares of our  Common  Stock,  par value  $.01 per  share,  to an  institutional
investor for aggregate gross proceeds of $35.0 million.

      The  sale  of the  Units  was  made  in  reliance  on the  exemption  from
registration  provided by Section 4(2) of the Securities  Act, on the basis that
the transaction did not involve a public  offering.  The offer and sale was made
to  only  one  institutional  investor.  In the  Securities  Purchase  Agreement
applicable to the transaction,  such institutional investor made representations
as  to  its  investment  intent.   The  Securities   Purchase  Agreement  places
substantial  restrictions  upon transfer of the securities and the  certificates
representing  the  securities  have been  legended to that effect.  The Warrants
issued as part of the Units  entitle the holders of the  Warrants to purchase an
aggregate of 60,353 shares of Common Stock and are exercisable  from February 4,
2000 through February 1, 2009 at a price of $.01 per share.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES.
        -------------------------------

      Not Applicable.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
        ---------------------------------------------------

      (a) By unanimous written consent,  dated as of April 30, 1999, the holders
of the  Registrant's  Common Stock,  Series A Cumulative  Convertible  Preferred
Stock (the  "Series A  Preferred  Stock")  and Series C  Cumulative  Convertible
Preferred  Stock (the  "Series C Preferred  Stock"),  voting as a single  class,
approved  and  adopted  an  amendment  to the  Company's  Amended  and  Restated
Certificate of  Incorporation  to effect an increase in the aggregate  number of
authorized shares of the Registrant's  capital stock from 3,748,800 to 4,128,800
shares,  composed of an increase in the aggregate number of authorized shares of
the Registrant's preferred stock from 748,800 to 1,128,800.

                                       18
<PAGE>

      (b) By unanimous written consent,  dated as of April 30, 1999, the holders
of the Registrant's Series A Preferred Stock, voting as a class,  approved (A) a
Certificate  of  Amendment  to  the  Certificate  of the  Powers,  Designations,
Preferences and Rights of the Series A Cumulative  Convertible  Preferred Stock,
par value $.01 per share, providing that the Series A Preferred Stock would rank
junior  to  the  Registrant's  Series  E  Senior  Redeemable,  Exchangeable  PIK
Preferred Stock (the "Series E Preferred  Stock") and the Registrant's  Series F
Senior  Redeemable,  Exchangeable  PIK Preferred  Stock (the "Series F Preferred
Stock"),  (B) a Certificate  of Amendment to the  Certificate  of Voting Powers,
Designations,  Preferences and Relative Participating, Optional or Other Special
Rights and Qualifications,  Limitations and Restrictions Thereof of the Series E
Preferred Stock providing that the Series E Preferred Stock would rank senior to
the Series A Preferred Stock and the Series C Preferred Stock and increasing the
number  of  authorized  shares of the  Registrant's  preferred  stock  which are
designated  as Series E  Preferred  Stock from  175,000 to 575,000  shares  (the
"Series E Certificate of Amendment"),  and (C) a Certificate of Amendment to the
Certificate   of  Voting   Powers,   Designations,   Preferences   and  Relative
Participating, Optional or Other Special Rights and Qualifications,  Limitations
and  Restrictions  Thereof of the Series F Preferred  Stock  providing  that the
Series F Preferred  Stock would rank senior to the Series A Preferred  Stock and
the Series C Preferred Stock (the "Series F Certificate of Amendment"),  each as
required by the  Certificate of Designation  governing the rights of the holders
of the Series A Preferred Stock.

      (c) By unanimous written consent,  dated as of April 30, 1999, the holders
of the Registrant's Series C Preferred Stock, voting as a class,  approved (a) a
Certificate  of  Amendment  to  the  Certificate  of the  Powers,  Designations,
Preferences and Rights of the Series C Cumulative  Convertible  Preferred Stock,
par value $.01 per share, providing that the Series C Preferred Stock would rank
junior to the Series E Preferred Stock and the Series F Preferred Stock, (B) the
Series E Certificate of Amendment and (C) the Series F Certificate of Amendment,
each as required by the  Certificate of Designation  governing the rights of the
holders of the Series C Preferred Stock.

      (d) By unanimous written consent,  dated as of April 30, 1999, the holders
of the Registrant's  Series E Preferred Stock,  voting as a class,  approved (A)
the  Series  E  Certificate  of  Amendment,  (B) the  Series  F  Certificate  of
Amendment, and (C) the issuance of 35,000 shares of the Series E Preferred Stock
to an institutional investor, each as required by the Certificate of Designation
governing the rights of the holders of the Series E Preferred Stock.

      (e) By unanimous written consent,  dated as of April 30, 1999, the holders
of the Registrant's  Series F Preferred Stock,  voting as a class,  approved (A)
the Series E Certificate of Amendment, (B) the Series F Certificate of Amendment
and (C) the  issuance  of 35,000  shares of the Series E  Preferred  Stock to an
institutional  investor,  each as required  by the  Certificate  of  Designation
governing the rights of the holders of the Series F Preferred Stock.

      (f) The Annual Meeting of  Stockholders of the Registrant was held on June
7, 1999. At the Annual Meeting, the following actions were taken:

      (i) The existing  board of seven  directors was re-elected in its entirety
to hold office  until the next Annual  Meeting of  Stockholders,  or until their
respective  successors shall be elected and qualified,  by a vote of the holders
of the  Registrant's  Common  Stock,  Series  A  Preferred  Stock  and  Series C
Preferred  Stock,  voting as a single  class.  In this vote each share of Common
Stock had one vote and each  share of  Series A  Preferred  Stock  and  Series C
Preferred  Stock had a number of votes  equal to the  number of shares of Common
Stock into which it is convertible. The persons elected as directors were:

                  Harold N. Kamine
                  Michael A. Sternberg
                  William H. Stewart
                  John G. Quigley
                  Randall A. Hack
                  Richard H. Patterson
                  Gary E. Lasher

                                       19
<PAGE>

      The vote was as follows:

                       FOR        AGAINST        ABSTAINING
                    1,690,771        0             95,238

      (ii) The  holders of the  Registrant's  Common  Stock,  Series A Preferred
Stock and  Series C  Preferred  Stock,  voting as a single  class,  approved  an
amendment to the 1998 Stock  Purchase  and Option Plan for Key  Employees of KMC
Telecom  Holdings,  Inc. and  Affiliates  (the "KMC Holdings Stock Option Plan")
previously  approved and recommended by the board of directors,  to increase the
number of  shares  of  Common  Stock of the  Company  authorized  to be  granted
pursuant to the KMC Holdings Stock Option Plan from 262,750 to 600,000.  In this
vote  each  share of  Common  Stock  had one vote  and  each  share of  Series A
Preferred  Stock and Series C Preferred Stock had a number of votes equal to the
number of shares of Common Stock into which it is convertible.

      The vote was as follows:

                      FOR          AGAINST        ABSTAINING
                    1,690,771         0             95,238

      (iii) The holders of the  Registrant's  Common  Stock,  Series A Preferred
Stock and Series C  Preferred  Stock,  voting as a single  class,  ratified  the
retention of Ernst & Young LLP as independent auditors of the Registrant for the
fiscal year ending  December 31,  1999.  In this vote each share of common stock
had one vote and each share of Series A  Preferred  Stock and Series C Preferred
Stock had a number of votes  equal to the number of shares of Common  Stock into
which it is convertible.

      The vote was as follows:

                      FOR          AGAINST        ABSTAINING
                    1,690,771         0             95,238

      (iv) The  holders of the  Registrant's  Common  Stock,  Series A Preferred
Stock and Series C Preferred  Stock,  voting as a single class,  ratified all of
the actions  taken by the board of  directors of the  Registrant  for the fiscal
year beginning  January 1, 1998 and ending  December 31, 1998. In this vote each
share of Common  Stock had one vote and each share of Series A  Preferred  Stock
and Series C Preferred Stock had a number of votes equal to the number of shares
of Common Stock into which it is convertible.

      The vote was as follows:

                     FOR           AGAINST        ABSTAINING
                  1,499,377.5        0             292,631.5



ITEM 5. OTHER INFORMATION.
        -----------------

      Not Applicable.

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K.
        ---------------------------------

      (a)   Exhibits
            --------

      3.1   Certificate  of  Incorporation  of KMC Telecom  Holdings,  Inc.,  as
            amended, dated as of April 30, 1999.



                                       20
<PAGE>

      3.2   Certificate of the Powers,  Designations,  Preferences and Rights of
            the Series A Cumulative  Convertible Preferred Stock, Par Value $.01
            Per Share, as amended, dated as of April 30, 1999.

      3.3   Certificate of the Powers,  Designations,  Preferences and Rights of
            the Series C Cumulative  Convertible Preferred Stock, Par Value $.01
            Per Share, as amended, dated as of April 30, 1999.

      3.4   Certificate of the Powers, Designations, Preferences and Rights of
            the Series D Cumulative  Convertible  Preferred  Stock, Par Value
            $.01 Per Share, as amended, dated as of April 30, 1999.

      3.5   Certificate of Voting Powers, Designations, Preferences and Relative
            Participating,  Optional or Other Special Rights and Qualifications,
            Limitations  and  Restrictions   Thereof  of  the  Series  E  Senior
            Redeemable,  Exchangeable PIK Preferred Stock, as amended,  dated as
            of April 30, 1999.

      3.6   Certificate of Voting Powers, Designations, Preferences and Relative
            Participating,  Optional or Other Special Rights and Qualifications,
            Limitations  and  Restrictions   Thereof  of  the  Series  F  Senior
            Redeemable,  Exchangeable PIK Preferred Stock, as amended,  dated as
            of June 1, 1999.

      4.1   First  Supplemental  Indenture dated as of May 24, 1999 by and among
            KMC Telecom  Holdings,  Inc.,  KMC Telecom  Financing,  Inc. and The
            Chase Manhattan Bank, as Trustee.

      4.2   Securities Purchase Agreement dated as of April 30, 1999 between
            KMC Telecom Holdings, Inc. and First Union Investors, Inc.

      4.3   Amendment  No. 1 dated as of June 1, 1999,  to  Securities  Purchase
            Agreement among KMC Telecom  Holdings,  Inc., First Union Investors,
            Inc.,   Newcourt   Commercial   Finance   Corporation   and   Lucent
            Technologies Inc.

      4.4   Warrant  Agreement  dated as of April 30,  1999  among  KMC  Telecom
            Holdings,  Inc., The Chase Manhattan  Bank, as Warrant Agent,  First
            Union  Investors,  Inc, Harold N. Kamine and Nassau Capital Partners
            L.P.

      4.5   Warrant Registration Rights Agreement dated as of April 30, 1999
            between KMC Telecom Holdings, Inc. and First Union Investors, Inc.

      4.6   Amendment  No. 1 dated as of April 30, 1999 to Warrant  Registration
            Rights  Agreement  among  KMC  Telecom  Holdings,   Inc.,   Newcourt
            Commercial Finance Corporation and Lucent Technologies Inc.

      4.7   Amendment  No. 1 dated as of April  30,  1999 to  Warrant  Agreement
            dated as of April 30, 1999 among KMC  Telecom  Holdings,  Inc.,  The
            Chase  Manhattan  Bank,  Newcourt  Commercial  Finance  Corporation,
            Lucent Technologies Inc. and First Union Investors, Inc.

      4.8   Amendment No. 2 dated as of June 1, 1999 to Warrant  Agreement among
            KMC Telecom  Holdings,  Inc.,  The Chase  Manhattan  Bank,  Newcourt
            Commercial Finance Corporation,  Lucent Technologies Inc., Harold N.
            Kamine and Nassau Capital Partners L.P.

      4.9   Preferred Stock Registration Rights Agreement dated as of
            April 30, 1999 between KMC Telecom Holdings, Inc. and First Union
            Investors, Inc.

                                       21
<PAGE>

      4.10  Amendment  No.  1  dated  as of  June 1,  1999  to  Preferred  Stock
            Registration  Rights  Agreement  among KMC Telecom  Holdings,  Inc.,
            First Union Investors, Inc., Newcourt Commercial Finance Corporation
            and Lucent Technologies, Inc.

      4.11  Amendment  No. 5 dated  as of  April  30,  1999 to the  Amended  and
            Restated  Stockholders  Agreement among KMC Telecom Holdings,  Inc.,
            Nassau  Capital  Partners  L.P.,  NAS  Partners I L.L.C.,  Harold N.
            Kamine,  Newcourt Commercial Finance  Corporation,  General Electric
            Capital Corporation, First Union National Bank, CoreStates Holdings,
            Inc. and KMC Telecommunications L.P.

      4.12  Amendment No. 6 dated as of June 1, 1999 to the Amended and Restated
            Stockholders  Agreement  among KMC Telecom  Holdings,  Inc.,  Nassau
            Capital  Partners  L.P.,  NAS  Partners I L.L.C.,  Harold N. Kamine,
            Newcourt  Commercial Finance  Corporation,  General Electric Capital
            Corporation,  First Union National Bank, KMC Telecommunications L.P.
            and CoreStates Holdings, Inc.

      10.1  Amendment  No. 1 made as of June 7, 1999 to 1998 Stock  Purchase and
            Option Plan for Key Employees of KMC Telecom Holdings, Inc.
            and Affiliates.

      27.1  Financial Data Schedule.

      (b)   Reports on Form 8-K
            -------------------

      (b)(i) A report on Form 8-K was filed by the  Registrant on April 28, 1999
pursuant to Item 5 thereof  reporting  its unaudited  financial  results for the
three month period ended March 31, 1999.  Such financial  results were disclosed
in a Press Release, dated April 28, 1999, filed as an exhibit to such report.

      (b)(ii)  A report on Form 8-K was filed by the  Company  on June 10,  1999
pursuant to Item 5 thereof  reporting the results of an  arbitration  proceeding
previously disclosed in Item 3 - "Legal Proceedings" of its Annual Report to the
Securities and Exchange  Commission on Form 10-K for the year ended December 31,
1998.



                                       22
<PAGE>





                                  SIGNATURES

      Pursuant to the  requirements of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

DATED: August  13, 1999



                                      KMC TELECOM HOLDINGS, INC.
                                             (Registrant)



                                      By: /s/     Michael A. Sternberg
                                         ------------------------------
                                      Michael A. Sternberg
                                      President and Chief Executive Officer
                                      (Principal Executive Officer)



                                      By: /s/    James D. Grenfell
                                         -------------------------------
                                      James D. Grenfell
                                      Executive Vice President, Chief
                                      Financial Officer and Secretary
                                      (Principal Financial Officer)




                                       23
<PAGE>


EXHIBIT INDEX

    NO.   DESCRIPTION
    --    -----------

    3.1   Certificate  of  Incorporation  of KMC Telecom  Holdings,  Inc.,  as
          amended, dated as of April 30, 1999.

    3.2   Certificate of the Powers,  Designations,  Preferences and Rights of
          the Series A Cumulative  Convertible Preferred Stock, Par Value $.01
          Per Share, as amended, dated as of April 30, 1999.

    3.3   Certificate of the Powers,  Designations,  Preferences and Rights of
          the Series C Cumulative  Convertible Preferred Stock, Par Value $.01
          Per Share, as amended, dated as of April 30, 1999.

    3.4   Certificate of the Powers, Designations, Preferences and Rights of the
          Series D Cumulative  Convertible  Preferred  Stock, Par Value $.01 Per
          Share, as amended, dated as of April 30, 1999.

    3.5   Certificate of Voting Powers, Designations, Preferences and Relative
          Participating,  Optional or Other Special Rights and Qualifications,
          Limitations  and  Restrictions   Thereof  of  the  Series  E  Senior
          Redeemable,  Exchangeable PIK Preferred Stock, as amended,  dated as
          of April 30, 1999.

    3.6   Certificate  of  Amendment  of the  Certificate  of  Voting  Powers,
          Designations,  Preferences and Relative  Participating,  Optional or
          Other   Special   Rights   and   Qualifications,   Limitations   and
          Restrictions Thereof of the Series F Senior Redeemable, Exchangeable
          PIK Preferred Stock, as amended, dated as of June 1, 1999.

    4.1   First  Supplemental  Indenture dated as of May 24, 1999 by and among
          KMC Telecom  Holdings,  Inc.,  KMC Telecom  Financing,  Inc. and The
          Chase Manhattan Bank, as Trustee.

    4.2   Securities Purchase Agreement dated as of April 30, 1999 between
          KMC Telecom Holdings, Inc. and First Union Investors, Inc.

    4.3   Amendment  No. 1 dated as of June 1, 1999,  to  Securities  Purchase
          Agreement among KMC Telecom  Holdings,  Inc., First Union Investors,
          Inc.,   Newcourt   Commercial   Finance   Corporation   and   Lucent
          Technologies Inc.

    4.4   Warrant  Agreement  dated as of April 30,  1999  among  KMC  Telecom
          Holdings,  Inc., The Chase Manhattan  Bank, as Warrant Agent,  First
          Union  Investors,  Inc, Harold N. Kamine and Nassau Capital Partners
          L.P.

    4.5   Warrant Registration Rights Agreement dated as of April 30, 1999
          between KMC Telecom Holdings, Inc. and First Union Investors, Inc.

    4.6   Amendment  No. 1 dated as of April 30, 1999 to Warrant  Registration
          Rights  Agreement  among  KMC  Telecom  Holdings,   Inc.,   Newcourt
          Commercial Finance Corporation and Lucent Technologies Inc.

    4.7   Amendment  No. 1 dated as of April  30,  1999 to  Warrant  Agreement
          dated as of April 30, 1999 among KMC  Telecom  Holdings,  Inc.,  The
          Chase  Manhattan  Bank,  Newcourt  Commercial  Finance  Corporation,
          Lucent Technologies Inc. and First Union Investors, Inc.

                                       24
<PAGE>

    4.8   Amendment No. 2 dated as of June 1, 1999 to Warrant  Agreement among
          KMC Telecom  Holdings,  Inc.,  The Chase  Manhattan  Bank,  Newcourt
          Commercial Finance Corporation,  Lucent Technologies Inc., Harold N.
          Kamine and Nassau Capital Partners L.P.

    4.9   Preferred Stock Registration Rights Agreement dated as of
          April 30, 1999 between KMC Telecom Holdings, Inc. and First Union
          Investors, Inc.

    4.10  Amendment  No.  1  dated  as of  June 1,  1999  to  Preferred  Stock
          Registration  Rights  Agreement  among KMC Telecom  Holdings,  Inc.,
          First Union Investors, Inc., Newcourt Commercial Finance Corporation
          and Lucent Technologies, Inc.

    4.11  Amendment  No. 5 dated  as of  April  30,  1999 to the  Amended  and
          Restated  Stockholders  Agreement among KMC Telecom Holdings,  Inc.,
          Nassau  Capital  Partners  L.P.,  NAS  Partners I L.L.C.,  Harold N.
          Kamine,  Newcourt Commercial Finance  Corporation,  General Electric
          Capital Corporation, First Union National Bank, CoreStates Holdings,
          Inc. and KMC Telecommunications L.P.

    4.12  Amendment No. 6 dated as of June 1, 1999 to the Amended and Restated
          Stockholders  Agreement  among KMC Telecom  Holdings,  Inc.,  Nassau
          Capital  Partners  L.P.,  NAS  Partners I L.L.C.,  Harold N. Kamine,
          Newcourt  Commercial Finance  Corporation,  General Electric Capital
          Corporation,  First Union National Bank, KMC Telecommunications L.P.
          and CoreStates Holdings, Inc.

    10.1  Amendment  No. 1 made as of June 7, 1999 to 1998 Stock  Purchase and
          Option Plan for Key Employees of KMC Telecom Holdings, Inc.
          and Affiliates.

    27.1  Financial Data Schedule.








                AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

                                       OF

                           KMC TELECOM HOLDINGS, INC.

          FIRST: The name of the Corporation is KMC Telecom Holdings, Inc.

          SECOND:  The  address of the  Corporation's  registered  office in the
State of Delaware is The Corporation  Trust Company,  1209 Orange Street, in the
City of Wilmington, County of New Castle.

          THIRD:  The purpose of the  Corporation is to engage in any lawful act
or  activity  for  which   corporations  may  be  organized  under  the  General
Corporation Law of the State of Delaware.

          FOURTH:

          A. AUTHORIZED CAPITAL STOCK.

          The total  number of shares of all classes of capital  stock which the
Corporation shall have the authority to issue is 4,128,800 shares, consisting of
3,000,000  shares of Common  Stock with a par value of $0.01 per share  ("Common
Stock") and  1,128,000  shares of Preferred  Stock with a par value of $0.01 per
share ("Preferred  Stock").  The Preferred Stock may be issued from time to time
in one or more series.  The Board of Directors  is hereby  authorized  to fix or
alter by resolution or resolutions,  the designations,  preferences and relative
participating,  optional,  or other special  rights of the shares of each series
and the qualifications, limitations, or restrictions thereon, including, but not
limited to,  determination  of the dividend rights,  dividend rates,  conversion
rights,  voting rights,  rights in terms of redemption  (including  sinking fund
provisions),  redemption  price or prices  and  liquidation  preferences  of any
wholly unissued series of Preferred Stock and the number of shares  constituting
any such series and the  designation  thereof of any of them; and to increase or
decrease  the number of shares of any series  subsequent  to the issue of shares
then  outstanding.  In case the  number  of  shares  of any  series  shall be so
decreased,  the shares  constituting such decrease shall resume the status which
they had prior to the adoption of the resolution originally fixing the number of
shares in such series.

          B. COMMON STOCK.

          1. GENERAL. The voting, dividend and liquidation rights of the holders
of the Common Stock are subject to and qualified by the rights of the holders of
the Preferred Stock.

          2.  DIVIDENDS.  Dividends may be declared and paid on the Common Stock
from funds lawfully  available  therefor as and when  determined by the Board of
Directors  and  subject  to  any  preferential   dividend  rights  of  any  then
outstanding Preferred Stock.

          3.  DISSOLUTION,  LIQUIDATION  OR  WINDING  UP.  In the  event  of any
dissolution,  liquidation  or  winding  up of the  affairs  of the  Corporation,
whether  voluntary or involuntary,  each issued and outstanding  share of Common
Stock shall  entitle the holder  thereof to receive an equal  portion of the net
assets of the Corporation available for distribution to holders of Common Stock,
subject to any preferential rights of any then outstanding Preferred Stock.

          4.  VOTING  RIGHTS.  Except  as  otherwise  required  by law  or  this
Certificate of Incorporation, each holder of Common Stock shall have one vote in
respect of each share of stock held by such holder of record on the books of the
Corporation for the election of directors and on all matters submitted to a vote
of stockholders of the Corporation.

          C. PREFERRED STOCK.

          The  Preferred  Stock may be  issued  from time to time in one or more
series.  The Board of Directors of the  Corporation  is expressly  authorized to
provide  for the issue of all or any of the  remaining  shares of the  Preferred
Stock in one or more series, and to fix the number of shares and to determine or
alter for each such series,  such voting powers,  full or limited,  or no voting
powers,  and  such  designations,   preferences,  and  relative,  participating,
optional, or other rights and such qualifications,  limitations, or restrictions
thereof,  as shall be stated and  expressed  in any  resolution  or  resolutions
adopted by the Board of Directors  providing for the issue of such shares and as
may be permitted by the General Corporation Law of the State of Delaware.

          FIFTH: Elections of directors need not be by ballot unless the By-Laws
of the Corporation shall so provide.

          SIXTH:  The Board of Directors of the Corporation may make By-Laws and
from time to time may alter, amend or repeal By-Laws.

          SEVENTH:  A director of the corporation shall not be personally liable
to the  corporation  or its  shareholders  for  monetary  damages  for breach of
fiduciary  duty as a  director  except for  liability  (i) for any breach of the
director's duty of loyalty to the corporation or its stockholders, (ii) for acts
or omissions  not in good faith or which  involve  intentional  misconduct  or a
knowing  violation  of law,  (iii)  under  Section 174 of the  Delaware  General
Corporation Law, or (iv) for any transaction form which the director derived any
improper personal benefit.  No amendment or repeal of this provision shall apply
to or have any effect on the liability or alleged  liability of any director for
or with  respect to any acts or omissions of such  director  occurring  prior to
such amendment or repeal.

          EIGHTH:

          Section 1. POWERS OF DIRECTORS. The property,  business and affairs of
the Corporation  shall be managed and controlled by its Board of Directors.  The
Board may  exercise all of the powers of the  Corporation  except such as are by
law, the Certificate of Incorporation or the By-Laws  conferred upon or reserved
to the stockholders.

          Section  2.  NUMBER  AND  TERM OF  OFFICE.  The  number  of  directors
constituting  the entire Board of Directors  shall not be less than six nor more
than  nine.  The  number  of  directors  shall  be  fixed  from  time to time by
resolution of the Board of Directors.

          Section 3. RESIGNATIONS.  Any director or member of a committee of the
Board may resign at any time.  Such  resignation  shall be made in  writing  and
shall take effect at the time specified therein, and if no time is specified, at
the  time of its  receipt  by the  Chairman  of the  Board,  if one is  elected,
President or Secretary.  The acceptance of a resignation  shall not be necessary
to make it effective.

          Section 4. REMOVAL.  Any director or the entire Board of Directors may
be removed  either for or without cause at any time by the  affirmative  vote of
the holders of a majority of all of the shares of stock outstanding and entitled
to vote for the  election  of  directors  at any  annual or  special  meeting of
stockholders  called for that purpose.  Vacancies  thus created may be filled at
the  meeting  held for the  purpose  of  removal  by the  affirmative  vote of a
majority  of the  stockholders  entitled  to vote  for  directors,  or if not so
filled, by the directors as provided in Section 5 below.

          Section 5. VACANCIES AND NEWLY CREATED DIRECTORSHIPS. Vacancies in the
office of any director or member of a committee  of the Board of  Directors  and
newly  created  directorships  may be filled by a majority vote of the remaining
directors  in the  office.  Any  director  so chosen  shall hold  office for the
unexpired term of his  predecessor  and until his successor shall be elected and
qualified or until his earlier  resignation or removal.  However,  the directors
may not fill the  vacancy  created  by removal of a  director  by  electing  the
director so removed.

          Section  6.  PLACE OF  MEETING.  The Board of  Directors  may hold its
meetings  at such places and times as the Board of  Directors  from time to time
shall determine.

          Section 7.  REGULAR  MEETINGS.  No notice  shall be  required  for any
regular meeting of the Board of Directors;  however, if the item or place of any
regular  meeting  shall be changed,  notice  shall be given to each  Director at
least two days before the meeting.

          Section  8.  SPECIAL  MEETINGS.  Special  meetings  of  the  Board  of
Directors shall be called by the Chairman of the Board,  if one is elected,  the
President or by the  Secretary on the written  request of any two  directors and
shall be held at such place as may be determined by the directors or as shall be
stated in the notice of the meeting.

          Section 9. QUORUM,  VOTING AND  ADJOURNMENT.  A majority of the entire
Board of Directors of any committee of the Board of Directors shall constitute a
quorum for the  transaction of business at any meeting of the Board of Directors
or committee  thereof.  The vote of the majority of the directors present at any
meeting  of the Board of  Directors  or  committee  at which a quorum is present
shall be the act of the Board of  Directors or  committee.  If at any meeting of
the Board or committee there is less than a quorum present,  a majority of those
present may adjourn the meeting from time to time.

          Section  10.  ORGANIZATION.  The  Chairman  of  the  Board,  if one is
elected, or, in his absence or the vacancy of such office, the President,  shall
preside  at all  meetings  of the  Board of  Directors.  In the  absence  of the
Chairman  of the Board and the  President,  a  Chairman  shall be elected by the
Directors  present.  The Secretary of the Corporation  shall act as Secretary of
all meetings of the Directors. In the absence of the Secretary, the Chairman may
appoint any person to act as Secretary of the meeting.

          Section 11.  COMMITTEES.  The Board of  Directors  may, by  resolution
passed by a  majority  of the  Board,  designate  one or more  committees,  each
committee  to consist of one or more of the  directors of the  Corporation.  The
Board may designate one or more directors as alternate members of any committee,
to replace any absent or disqualified member of any meeting of the committee. In
the  absence  or  disqualification  of a member of a  committee,  the  member or
members thereof present at any meeting and not disqualified from voting, whether
or not they constitute a quorum,  may unanimously  appoint another member of the
Board of  Directors  to act at the  meeting  in the place of any such  absent or
disqualified  member. Any such committee,  to the extent specified by resolution
of the Board,  shall have and may exercise  all the powers and  authority of the
Board of  Directors  in the  management  of the  business and the affairs of the
Corporation,  and may authorize the seal of the Corporation to be affixed to all
papers  which may  require  it;  but no such  committee  shall have the power or
authority  to amend the  Certificate  of  Incorporation,  adopt an  agreement of
merger or  consolidation,  recommend  to the  stockholders  the  sale,  lease or
exchange of all or substantially all of the  Corporation's  property and assets,
recommend to the  stockholders a dissolution of the  Corporation or a revocation
of a dissolution, or amend the By-Laws; and unless otherwise expressly provided,
no such committee  shall have the power or authority to declare a dividend or to
authorize the issuance of stock.

          Section 12. CONFERENCE TELEPHONE MEETINGS. Unless otherwise restricted
by the Certificate of Incorporation or by the By-Laws,  the members of the Board
of Directors or any committee thereof, may participate in a meeting of the Board
or  committee,  by means  of  conference  telephone  or  similar  communications
equipment  by means of which all persons  participating  in the meeting can hear
each other, and such participation  shall constitute  presence in person at such
meeting.

          Section 13. ACTION WITHOUT A MEETING. Any action required or permitted
to be taken at any meeting of the Board of Directors,  or any committee thereof,
may be taken without a meeting if all members of the Board or committee,  as the
case may be, consent thereto in writing.

          Section 14.  COMPENSATION.  Directors shall be entitled to receive and
be paid for their  services of such  compensation  as the Board of Directors may
determine.  Any director may serve the  Corporation  in any other capacity as an
officer, agent or otherwise, and receive compensation therefor.

          Section 15. SPECIAL CLASSIFICATION PROVISIONS.

          (a)  Notwithstanding   anything  to  the  contrary  in  the  preceding
provisions of this Article  EIGHTH,  (but subject to such  requirements  as may,
from  time to time,  be  specified  in the  terms of any  outstanding  series of
Preferred  Stock),  the  provisions  of this Section 15 shall govern the number,
election and removal of the members of the Board of Directors and any committees
thereof  (and  the  filling  of  vacancies  on the  Board of  Directors  and any
committees  thereof) until such time as the aggregate number of shares of Common
Stock that are  outstanding and owned by Nassau Capital  Partners,  L.P. and its
affiliates  ("Nassau")  or subject to issuance upon  conversion  of  outstanding
shares of Preferred  Stock ("Nassau  Common Stock") ceases to represent at least
five percent of the  aggregate  number of  outstanding  shares of all classes of
Common Stock on a fully converted basis.

          (b) The number of directors constituting the entire Board of Directors
shall be six or such greater number (not exceeding nine), or such greater number
as may be required, from time to time, by the terms of any outstanding series of
Preferred  Stock as shall be specified in a resolution of the Board of Directors
approved by the Board of  Directors;  PROVIDED that so long as there shall be at
least one Kamine Director (as hereinafter defined),  the affirmative vote of the
Kamine  Directors shall be required,  and so long as there shall be at least one
Nassau Director (as  hereinafter  defined),  the affirmative  vote of the Nassau
Directors shall be required.

          (c) Subject to the provisions of paragraph (h), three of the directors
of the Corporation (the "Kamine Directors") shall be elected by Harold N. Kamine
and his affiliates  ("Kamine") voting their Common Stock ("Kamine Common Stock")
separately as a class;  provided that one of the Kamine  Directors  shall be the
President and Chief Executive  Officer of the Corporation,  elected from time to
time  pursuant  to  Article IV of the  By-Laws.  Subject  to the  provisions  of
paragraph  (h),  three  of  the  directors  of  the  Corporation   (the  "Nassau
Directors")  shall  be  elected  by  holders  of  Nassau  Common  Stock,  voting
separately  as a class.  Subject to the  provisions of paragraph (h) and to such
requirements  as may,  from  time to  time,  be  specified  in the  terms of any
outstanding series of Preferred Stock, any other directors of the Corporation to
be elected  shall be elected by holders of Kamine Common Stock and Nassau Common
Stock voting together as a single class.

          (d) No Kamine  Director may be removed,  whether for or without cause,
except by the affirmative  vote of a majority in voting power of the outstanding
shares of Kamine Common Stock voting  separately as a class.  No Nassau Director
may be removed,  whether for or without cause, except by the affirmative vote of
a majority in voting  power of the  outstanding  shares of Nassau  Common  Stock
voting as a separate class.

          (e) If as a result of death, removal or resignation, any vacancy shall
exist among the Kamine Directors or Nassau  Directors,  as the case may be, such
vacancy  shall be filled by the holders of Kamine  Common Stock or Nassau Common
Stock, respectively, voting as a separate class.

          (f) A quorum for the  transaction  of  business  at any meeting of the
Board of  Directors or any  committee  thereof  shall  require the presence of a
majority of the Board of Directors,  including at least one Kamine  Director and
at least one Nassau Director.

          (g) The  members of each  committee  of the Board of  Directors  shall
include an equal number of Kamine Directors and Nassau Directors.

          (h) (1) From and after the date that Nassau and its  affiliates own in
the aggregate Shares  representing  less than two-thirds of the shares of Nassau
Common Stock initially  issued to them,  Nassau shall have the right to elect or
remove only two (2)  directors  for  election or removal (and shall cause one of
the Nassau  Directors  to resign),  (ii) from and after the date that Nassau and
its affiliates own in the aggregate Shares  representing  less than one-third of
the shares of Nassau Common Stock  initially  issued to them,  Nassau shall have
the right to elect or remove only one (1) director  (and shall cause such number
of Nassau Directors to resign such that one Nassau Director remains on the Board
of Directors) and (iii) at such time as Nassau and affiliates  owns less than 5%
of the shares of Nassau  Common Stock  initially  issued them on a fully diluted
basis (taking into account the conversion  prices then in effect),  Nassau shall
not be  entitled  to elect or remove any  directors  (and shall cause all Nassau
Directors to resign).

               (2) Notwithstanding anything herein to the contrary, (i) from and
after  the date that  Kamine  and his  affiliates  own in the  aggregate  Shares
representing  less  than  two-thirds  of  the  shares  of  Kamine  Common  Stock
originally  issued to them,  Kamine shall have the right to elect or remove only
two (2) directors (and shall cause one of the Kamine Directors to resign),  (ii)
from and after the date that  Kamine  and his  affiliates  own in the  aggregate
Shares  representing  less than  one-third of the shares of Kamine  Common Stock
originally  issued to them,  Kamine shall have the right to elect or remove only
one (1) director (and shall cause such number of Kamine Directors to resign such
that one Kamine  Director  remains on the Board of Directors)  and (iii) at such
time as  Kamine  and his  affiliates  own less  than 5% of the  shares of Kamine
Common Stock originally issued to them, Kamine shall not be entitled to elect or
remove any directors (and shall cause all Kamine Directors to resign).

               (3)  If any  director  resigns  pursuant  to  the  provisions  of
paragraphs  (h)(1) and (h)(2),  unless the number of directors  constituting the
entire Board of Directors shall be reduced in accordance with paragraph (b), the
Board of Directors shall fill any vacancy for the unexpired term of the Director
who has resigned and  thereafter the holders of the Common Stock shall elect any
such Director.

          NINTH:  In  addition  to  such  other  voting  requirements  as may be
specified by the General Corporation Law of the State of Delaware,  no provision
of Article  EIGHTH or this  Article  NINTH may be  amended,  altered or repealed
except by  affirmative  vote of a majority in voting power of the Kamine  Common
Stock and  Nassau  Common  Stock (as  defined in Article  EIGHTH),  each  voting
separately as a class.



<PAGE>





                            CERTIFICATE OF AMENDMENT

                                     OF THE

                          CERTIFICATE OF INCORPORATION

                                       OF

                           KMC TELECOM HOLDINGS, INC.

                     PURSUANT TO SECTION 242 OF THE GENERAL
                    CORPORATION LAW OF THE STATE OF DELAWARE


          KMC TELECOM HOLDINGS, INC., a corporation organized and existing under
and by  virtue  of  General  Corporation  Laws of the  State  of  Delaware  (the
"CORPORATION"), does hereby certify as follows:

          FIRST: That the name of the Corporation is KMC TELECOM HOLDINGS, INC.

          SECOND: That the original Certificate of Incorporation of the
Corporation  was filed with the  Secretary of State of Delaware on September 17,
1997,  and that an Amended and  Restated  Certificate  of  Incorporation  of the
Corporation  was filed with the  Secretary  of State of the State of Delaware at
12:00 p.m. on September  22, 1997,  and that a  Certificate  of Amendment of the
Amended and Restated  Certificate of  Incorporation of the Corporation was filed
with the  Secretary  of State of the State of Delaware at 10:00 a.m. on November
5, 1997,  and that a  Certificate  of  Amendment  of the  Amended  and  Restated
Certificate of  Incorporation of the Corporation was filed with the Secretary of
State of the State of Delaware  at 9:30 a.m.  on  February  4, 1999,  and that a
Certificate   of  Amendment  of  the  Amended  and   Restated   Certificate   of
Incorporation  of the  Corporation  was filed with the Secretary of State of the
State of Delaware  at 3:30 p.m. on April 30,  1999,  and that a  Certificate  of
Correction  filed to correct the  Certificate  of  Amendment  of the Amended and
Restated  Certificate of  Incorporation  of the  Corporation  was filed with the
Secretary of State of the State of Delaware at 11:45 a.m. on May 6, 1999.

          THIRD:  That the Board of Directors of the  Corporation,  by unanimous
written  consent  in  lieu  of  meeting,   adopted  a  resolution  amending  the
Certificate of Incorporation  and adopting the Amended and Restated  Certificate
of  Incorporation  as set  forth in  Exhibit  A  hereto  as the  Certificate  of
Incorporation  of the  Corporation.  The  stockholders of the  Corporation  duly
approved  the Amended  and  Restated  Certificate  of  Incorporation  by written
consent in accordance  with Sections 228 and 242 of the General  Corporation  of
the State of Delaware.

          IN WITNESS  WHEREOF,  KMC  TELECOM  HOLDINGS,  INC.  has  caused  this
certificate  to be duly  executed  by its  ____________________  this ___ day of
__________, 1999.


                                        KMC TELECOM HOLDINGS, INC



                                        By:___________________________
                                        Name: ________________________
                                        Title:________________________




                                                                               1



                           KMC TELECOM HOLDINGS, INC.


                    CERTIFICATE OF THE POWERS, DESIGNATIONS,
                     PREFERENCES AND RIGHTS OF THE SERIES A
                     CUMULATIVE CONVERTIBLE PREFERRED STOCK,
                            PAR VALUE $.0l PER SHAPE

                     Pursuant to Sections 141 and 242 of the
                General Corporation Law of the State of Delaware

As  contemplated  by Sections 141 and 242 of the General  Corporation Law of the
State of Delaware (the "DGCL"), the following resolution was duty adopted by the
Board  of  Directors  of  KMC  Telecom   Inc.,  a  Delaware   corporation   (the
"Corporation"), by unanimous written consent, dated April 30, 1999:

          WHEREAS,  the Board of Directors  of the  Corporation  is  authorized,
within  the   limitations  and   restrictions   stated  in  the  Certificate  of
Incorporation  of the  Corporation,  to propose by resolution or resolutions for
the  amendment  of  outstanding  series of preferred  stock,  par value $.0l per
share, of the Corporation,  to contain such voting powers,  full or limited,  or
without  voting  powers,  and  such  designations,   preferences  and  relative,
participating, optional or other special rights, and qualifications, limitations
or  restrictions  as  shall  be  stated  and  expressed  in  the  resolution  or
resolutions  providing  for  the  amendment  thereof  adopted  by the  Board  of
Directors,  and as are not stated and  expressed  in the  Amended  and  Restated
Certificate of Incorporation,  or any amendment thereto,  including (but without
limiting the  generality  of the  foregoing)  such  provisions as may be desired
concerning  voting,  redemption,  dividends,  dissolution or the distribution of
assets and such other  subjects  or  matters  as may be fixed by  resolution  or
resolutions of the Board of Directors under the DGCL;
<PAGE>
                                                                               2


          WHEREAS,  the Board of Directors of the  Corporation,  pursuant to its
authority  under  Section  242 of the  DGCL,  deems it  advisable  to amend  and
restated the terms of its Series A Cumulative Convertible Preferred Stock;

          NOW, THEREFORE, BE IT RESOLVED:

          1.   DESIGNATION  AND  NUMBERS  OF  SHARES.   There  shall  be  hereby
established  a series of  preferred  stock  designated  as "Series A  Cumulative
Convertible  Preferred Stock" (such Series being hereinafter  referred to as the
"Series  A  Preferred  Stock").  The  authorized  number  of  shares of Series A
Preferred  Stock shall be 123,800.  The  liquidation  preference of the Series A
Preferred Stock shall be $100 per share (the "Liquidation Preference").

          2. RANK. The Series A Preferred Stock shall,  with respect to dividend
distributions  and   distributions   upon  the  liquidation,   winding-up,   and
dissolution of the  Corporation,  rank (i) senior to the Common Stock, par value
$.0l per share, of the Corporation (the "Common  Stock");  (ii) on a parity with
(A) each class or series of Capital  Stock,  other than the Common Stock and the
Senior  Preferred Stock, and (B) the Parity Preferred Stock; and (iii) junior to
the Senior  Preferred  Stock (the  Common  Stock and the  classes  and series of
Capital Stock described in clause (ii) of this Section are collectively referred
to as the "Junior Stock"). The Series A Preferred Stock shall also, with respect
to any redemption or repurchase by the  Corporation  of its Capital Stock,  rank
junior with respect to the Senior Preferred Stock, except as provided in Section
3 of the Shareholders Agreement

          3. DIVIDENDS.

          (a) Beginning on the date of issuance of the Series A Preferred Stock,
the  holders of the  outstanding  shares of Series A  Preferred  Stock  shall be
entitled to receive,  when,  as and if declared by the Board of Directors of the
Corporation,  out of funds legally  available  therefor,  cash dividends on each
share  of  Series  A  Preferred  Stock at an  annual  rate  equal to 7.0% of the
Liquidation Preference,  payable quarterly in arrears on the applicable Dividend
Payment Date or the next  succeeding  Business Day, if the  applicable  Dividend
Payment Date is not a Business Day.  Notwithstanding the foregoing, the dividend
payable on each share of Series A  Preferred  Stock with  respect to the Initial
Dividend  Period  shall  be  equal  to (i)  7.0% of the  Liquidation  Preference
multiplied  by (ii) a  fraction  equal  to (A) the  number  of  days  from  (and
including)  the  Series A  Preferred  Stock  Issue Date to (but  excluding)  the
Dividend Payment Date with respect to the Initial Dividend Period divided by (B)
365. All dividends shall be cumulative,  whether or not earned or declared, from
the date of  issuance  of the  Series A  Preferred  Stock and  shall be  payable
quarterly in arrears on each  Dividend  Payment  Date,  commencing  on the first
Dividend  Payment  Date after the date of  issuance  of the  Series A  Preferred
Stock. If any dividend (or portion thereof) payable on any Dividend Payment Date
is not declared or paid in full on such  Dividend  Payment  Date,  the amount of
such dividend  payable that is not paid on such date shall  increase at the rate
of 7.0% per annum  (compounded  quarterly on each  subsequent  Dividend  Payment
Date) from such Dividend  Payment Date until paid in full. Each  distribution on
the  Series A  Preferred  Stock  shall be  payable  to holders of record as they

<PAGE>
                                                                               3


appear on the stock books of the Corporation on such record dates, not less than
ten (10) nor more than sixty (60) days  preceding the related  Dividend  Payment
Date, as shall be fixed by the Board of Directors of the Corporation.

          (b) All  accumulated  and unpaid  dividends  on the Series A Preferred
Stock shall be paid by the  Corporation  upon the  occurrence  of a  Realization
Event,  without  reference to any regular  Dividend  Payment Date, to holders of
record on such date. The Corporation shall send by first class,  postage prepaid
mail a notice of the  Realization  Event to all  holders  of Series A  Preferred
Stock that are entitled to receive such dividends.  In the case of a Realization
Event which is an initial  public  offering,  if any such holder  gives  written
notice to the  Corporation  that such holder wishes to receive such  accumulated
unpaid  dividends  in the form of shares of  Common  Stock in lieu of cash,  the
Corporation,  in lieu of a cash  payment,  shall  issue to such  holder  on such
Dividend  Payment Date, a number of shares of Common Stock equal to the quotient
obtained by dividing (x) the aggregate  accumulated and unpaid  dividends on the
shares of Series A Preferred Stock held by such holder by (y) the price at which
shares  of  Common  Stock  are  sold  in  such  offering  (before  deduction  of
underwriting discounts and expenses of sale).

          (c) All  dividends  paid with  respect to shares of Series A Preferred
Stock  pursuant to Section 3(a) shall be paid pro rata and in like manner to all
of the holders entitled thereto.

          (d)  Nothing  herein   contained   shall  in  any  way  or  under  any
circumstances  be  construed  or deemed to require the Board of Directors of the
Corporation to declare, or the Corporation to pay or set apart for payment,  any
dividends on shares of the Series A Preferred  Stock at any time,  nor to permit
the Board of Directors of the Corporation to declare,  or the Corporation to pay
or set apart for  payment,  any  dividends  on shares of the Series A  Preferred
Stock  prior to the  payment  of any  dividends  accrued on shares of the Senior
Preferred Stock.

          4. LIQUIDATION PREFERENCE.

          (a)  In  the  event  of  any  voluntary  or  involuntary  liquidation,
dissolution  or  winding-up  of the affairs of the  Corporation,  the holders of
shares of Parity  Preferred Stock  (including the Series A Preferred Stock) then
outstanding shall be entitled to be paid for each share held thereby, out of the
assets of the Corporation  available for  distribution to its  stockholders,  an
amount in cash equal to the Liquidation  Preference plus an amount in cash equal
to  all  accumulated  and  unpaid  dividends  thereon  (calculated  pursuant  to
Paragraph  3(a)) to the date fixed for  liquidation,  dissolution  or winding-up
(including  an amount equal to a prorated  dividend for the period from the last
Dividend  Payment  Date  to the  date  fixed  for  liquidation,  dissolution  or
winding-up),  before any payment shall be made or any assets  distributed to the
holders of any shares of Junior Stock,  but after all  liquidation  payment have
been made to the  holders of all  shares of Senior  Preferred  Stock.  Except as
provided  in the  preceding  sentence,  holders  of the Parity  Preferred  Stock
(including  the  Series  A  Preferred  Stock)  shall  not  be  entitled  to  any
distribution in the event of any  liquidation,  dissolution or winding-up of the
affairs of the Corporation.  If the assets of the Corporation are not sufficient
to pay in full the  foregoing  liquidation  payments  payable to the  holders of
outstanding  shares  of the  Parity  Preferred  Stock  (including  the  Series A
Preferred  Stock),  then the  holders  of all shares of Parity  Preferred  Stock

<PAGE>
                                                                               4


(including   the  Series  A  Preferred   Stock)  shall  share  ratably  in  such
distribution  of assets in  accordance  with the amount that would be payable on
such  distribution if the amounts to which the holders of outstanding  shares of
Parity  Preferred  Stock  (including the Series A Preferred  Stock) are entitled
were paid in full. If all of the foregoing  liquidation payments with respect to
any share of Series A  Preferred  Stock  have been  made,  such share may not be
converted into Common Stock pursuant to Section 5.

          (b) For the purposes of this Section 4,  neither the  voluntary  sale,
conveyance,  exchange or transfer  (for cash,  shares of stocks,  securities  or
other  consideration)  of all or  substantially  all or part of the  property or
assets of the  Corporation  nor the  consolidation  or merger of the Corporation
with  one or more  other  corporations  shall  be  deemed  to be a  liquidation,
dissolution  or  winding-up,  voluntary  or  involuntary,  of the affairs of the
Corporation (unless such sale, conveyance, exchange or transfer is in connection
with  a   liquidation,   dissolution   or  winding-up  of  the  affairs  of  the
Corporation).

          5. CONVERSION.

          (a)  CONVERSION  PRICE.  Shares  of  Series  A  Preferred  Stock to be
converted  into shares of Common  Stock  shall be so  converted  initially  at a
conversion  price equal to  $20.633333  per share of Common  Stock,  which price
shall be adjusted as hereinafter  provided (and, as so adjusted,  is hereinafter
sometimes  referred to as the "Conversion  Price"),  with each share of Series A
Preferred  Stock being valued at $100.00 for such purpose (that is, a conversion
rate initially  equivalent to 4.8465266 shares of Common Stock for each share of
Series A Prefer-red  Stock so converted,  which is subject to adjustment (to the
nearest fourth decimal place) as the Conversion Price is adjusted as hereinafter
provided);  PROVIDED,  HOWEVER,  that in no event shall the Conversion  Price be
less than the par value, if any, of the Common Stock.

          (b) AUTOMATIC  CONVERSION  UPON A QUALIFIED  PUBLIC  OFFERING.  Upon a
Qualified  Public  Offering,  each  share of  Series  A  Preferred  Stock  shall
automatically  convert,  without  any action on the part of the holder  thereof,
into shares of Common Stock at the Conversion Price in effect at such time, plus
the right to receive an amount of cash equal to the accumulated unpaid dividends
on such share of Series A  Preferred  Stock to and  including  such date (or the
right to receive  additional  shares of Common  Stock in lieu of cash  dividends
pursuant to Section 3(b)).

          (c) CONVERSION AT THE OPTION OF THE HOLDER.  At any time and from time
to time prior to a Qualified Public Offering,  the holders of Series A Preferred
Stock shall have the right to convert, in whole or in part, each share of Series
A Preferred Stock into shares of Common Stock at the Conversion  Price in effect
at such  time,  plus  the  right  to  receive  an  amount  of cash  equal to the
accumulated  unpaid  dividends on each share of Series A Preferred  Stock to and
including  the  Conversion  Date (as  defined  below);  provided  that,  if such
Conversion Date is prior to a Realization Event, the Corporation may, in lieu of
making a payment  in cash  equal to such  amount,  deliver a number of shares of
Common Stock equal to such amount  divided by the Fair Market Value of one share
of Common Stock. In order to convert shares of Series A Preferred Stock pursuant
to this Section  5(c) the holder  thereof  shall  surrender at the office of the
Corporation  the  certificate  or  certificates  therefor,  duly endorsed to the
Corporation  in blank,  and give  written  notice to the  Corporation  that such
holder elects to convert such shares and shall state in writing therein the name

<PAGE>
                                                                               5


or names  (with  addresses)  in which  such  holder  wishes the  certificate  or
certificates  of Common Stock to be issued.  Shares of Series A Preferred  Stock
shall  be  deemed  to have  been  converted  on the  date of  surrender  of such
certificate or certificates as provided above (the "Conversion  Date"),  and the
person or persons  entitled to receive the shares of Common Stock  issuable upon
such  conversion  shall be treated  for all  purposes  as the  record  holder or
holders of such Common Stock on such date.  As soon as  practicable  on or after
the Conversion  Date, the  Corporation  shall issue and deliver a certificate or
certificates for the number of shares of Common Stock issuable upon conversion.

          (d) FRACTIONAL SHARES; PARTIAL-CONVERSION.  No fractional shares shall
be issued  upon  conversion  of shares of Series A  Preferred  Stock into Common
Stock. In case the number of shares of Series A Preferred  Stock  represented by
the certificate or certificates  surrendered  pursuant to this Section 5 exceeds
the number of shares  converted,  the Corporation  shall,  upon such conversion,
execute  and deliver to the holder,  at the  expense of the  Corporation,  a new
certificate or certificates for the number of shares of Series A Preferred Stock
represented by the certificate or certificates  surrendered  which are not to be
converted.  If any  fractional  share of  Common  Stock  would,  except  for the
provisions of the first  sentence of this Section  5(d), be delivered  upon such
conversion, the Corporation,  in lieu of delivering such fractional share, shall
pay to the holder  surrendering  the Series A Preferred  Stock for conversion an
amount in cash equal to the current  market  price of such  fractional  share as
determined in good faith by the Board of Directors.

          (e)  ADJUSTMENT  OF  CONVERSION  PRICE UPON  ISSUANCE OF COMMON STOCK.
Except as  provided in Section  5(f),  if and  whenever  the  Corporation  shall
hereafter issue or sell, or is, in accordance  with  subsection  5(e)(1) through
5(e)(6),  deemed to have  issued  or sold,  any  shares  of  Common  Stock for a
consideration  per share less than the  Conversion  Price in effect  immediately
prior to the time of such  issue or sale,  then,  forthwith  upon such  issue or
sale, the Conversion  Price shall be reduced to the price determined by dividing
(i) an amount  equal to the sum of (a) the  number  of  shares  of Common  Stock
outstanding  immediately  prior  to such  issue or sale  (determined  on a Fully
Diluted  basis)  multiplied  by the then existing  Conversion  Price and (b) the
consideration,  if any,  received by the Corporation upon such issue or sale, by
(ii) the total number of shares of Common Stock  outstanding  immediately  after
such issue or sale (determined on a Fully Diluted basis).

          For purposes of this Section 5(e), the following  subsections  5(e)(1)
to 5(e)(6) shall also be applicable:

          5(e)(1)  ISSUANCE OF RIGHTS OR OPTIONS.  In case at any time hereafter
the Corporation  shall in any manner grant (whether directly or by assumption in
a merger or otherwise) any Options to purchase  Common Stock or any  Convertible
Securities,  whether or not such Options or the right to convert or exchange any
such Convertible Securities are immediately exercisable, and the price per share
for which Common Stock is issuable upon the exercise of such Options or upon the
conversion or exchange of such  Convertible  Securities  (determined by dividing
(i) the total  amount,  if any,  received or receivable  by the  Corporation  as
consideration  for the  granting of such  Options,  plus the  minimum  aggregate
amount of additional  consideration payable to the Corporation upon the exercise
of all  such  Options,  plus,  in the  case  of such  Options  which  relate  to
Convertible   Securities,   the   minimum   aggregate   amount   of   additional
consideration,  if any,  payable  upon  the  issue  or sale of such  Convertible

<PAGE>
                                                                               6


Securities  and upon the  conversion  or  exchange  thereof,  by (ii) the  total
maximum  number of shares of Common  Stock  issuable  upon the  exercise of such
Options or upon the  conversion or exchange of all such  Convertible  Securities
issuable  upon the exercise of such Options)  shall be less than the  Conversion
Price in effect  immediately  prior to the time of the granting of such Options,
then the total  maximum  number of shares  of  Common  Stock  issuable  upon the
exercise of such  Options or upon  conversion  or exchange of the total  maximum
amount of such Convertible Securities issuable upon the exercise of such Options
shall be deemed to have been  issued  for such price per share as of the date of
granting of such  Options or the  issuance of such  Convertible  Securities  and
thereafter  shall be deemed to be outstanding.  Except as otherwise  provided in
subsection 5(e)(3), no adjustment of the Conversion Price shall be made upon the
actual  issue  of such  Common  Stock  or of such  Convertible  Securities  upon
exercise  of such  Options or upon the actual  issue of such  Common  Stock upon
conversion or exchange of such Convertible Securities.

          5(e)(2)  ISSUANCE OF CONVERTIBLE  SECURITIES.  In case the Corporation
shall  hereafter in any manner issue  (whether  directly or by  assumption  in a
merger or  otherwise)  or sell any  Convertible  Securities,  whether or not the
rights to exchange or convert any such  Convertible  Securities are  immediately
exercisable,  and the price per share for which  Common  Stock is issuable  upon
such  conversion  or  exchange  (determined  by  dividing  (i) the total  amount
received or receivable by the Corporation as consideration for the issue or sale
of such Convertible Securities,  plus the minimum aggregate amount of additional
consideration,  if any,  payable  to the  Corporation  upon  the  conversion  or
exchange  thereof,  by (ii) the total  maximum  number of shares of Common Stock
issuable  upon the  conversion or exchange of all such  Convertible  Securities)
shall be less than the Conversion Price in effect  immediately prior to the time
of such issue or sale,  then the total maximum  number of shares of Common Stock
issuable upon conversion or exchange of all such Convertible Securities shall be
deemed to have been  issued for such price per share as of the date of the issue
or sale of such  Convertible  Securities  and  thereafter  shall be deemed to be
outstanding,  provided  that (a) except as  otherwise  provided in  subparagraph
5(e)(3),  no adjustment of the  Conversion  Price should be made upon the actual
issue of such Common  Stock upon  conversion  or  exchange  of such  Convertible
Securities and (b) if any such issue or sale of such  Convertible  Securities is
made upon  exercise of any Options to purchase any such  Convertible  Securities
for  which  adjustments  of the  Conversion  Price  have  been or are to be made
pursuant to other provisions of this Section 5(e), no further  adjustment of the
Conversion Price shall be made by reason of such issue or sale.

          5(e)(3) CHANGE IN OPTION PRICE OR CONVERSION  RATE. Upon the happening
of any of the following  events,  namely,  if the purchase price provided for in
any Option referred to in subsection 5(e)(1), the additional  consideration,  if
any,  payable  upon the  conversion  or exchange of any  Convertible  Securities
referred to in  subsection  5(e)(1) or 5(e)(2) or the rate at which  Convertible
Securities  referred to in subsection 5(e)(1) or 5(e)(2) are convertible into or
exchangeable  for Common  Stock  shall  change at any time  (including,  but not
limited to, changes under or by reason of provisions designed to protect against
dilution),  the  Conversion  Price in  effect  at the time of such  event  shall
forthwith be readjusted to the Conversion  Price which would have been in effect
at such  time had such  Options  or  Convertible  Securities  still  outstanding
provided for such changed purchase price, additional consideration or conversion

<PAGE>
                                                                               7


rate, as the case may be, at the time  initially  granted,  issued or sold,  put
only if as a result  of such  adjustment  the  Conversion  Price  then in effect
hereunder is thereby  reduced;  and on the termination of any such Option or any
such right to convert or exchange such  Convertible  Securities,  the Conversion
Price then in effect  hereunder  shall  forthwith be increased to the Conversion
Price which would have been in effect at the time of such  termination  had such
Option or Convertible Securities, to the extent outstanding immediately prior to
such termination, never been issued.

          5(e)(4)  CONSIDERATION  FOR STOCK. In case any shares of Common Stock,
Options  or  Convertible  Securities  shall  be  issued  or sold for  cash,  the
consideration received therefor shall be deemed to be the amount received by the
Corporation  therefor,  without deduction  therefrom of any expenses incurred or
any  underwriting  commissions or concessions paid or allowed by the Corporation
in  connection  therewith.  In case any  shares  of  Common  Stock,  Options  or
Convertible  Securities  shall be issued or sold for a consideration  other than
cash,  the  amount  of  the  consideration  other  than  cash  received  by  the
Corporation  shall be  deemed  to be the fair  value  of such  consideration  as
determined  in good faith by the Board of  Directors,  without  deduction of any
expenses incurred or any underwriting commissions or concessions paid or allowed
by the Corporation in connection therewith.  In case any Options shall be issued
in connection  with the issue and sale of other  securities of the  Corporation,
together comprising one integral transaction in which no specific  consideration
is  allocated  to such Options by the parties  thereto,  such  Options  shall be
deemed to have been issued for such consideration as determined in good faith by
the Board of Directors of the Corporation.

          5(e)(5)  RECORD DATE. In case the  Corporation  shall take a record of
the holders of its Common Stock for the purpose of entitling them (i) to receive
a dividend or other distribution payable in Common Stock, Options or Convertible
Securities  or (ii) to  subscribe  for or  purchase  Common  Stock,  options  or
Convertible Securities,  then such record date shall be deemed to be the date of
the issue or sale of the shares of Common  Stock  deemed to have been  issued or
sold  upon  the  declaration  of such  dividend  or the  making  of  such  other
distribution  or the  date of the  granting  of such  right of  subscription  or
purchase, as the case may be.

          5(e)(6)  TREASURY  SHARES.  The  number  of  shares  of  Common  Stock
outstanding  at any given time shall not include  shares owned or held by or for
the account of the Corporation,  and the disposition of any such shares shall be
considered  an issue or sale of Common  Stock for the  purpose  of this  Section
5(e).

          (f) EXCEPTIONS TO CONVERSION  PRICE  ADJUSTMENT.  Notwithstanding  the
foregoing,  no adjustment to the Conversion Price shall be made pursuant to this
Section 5 in  connection  with the  grant,  issuance  or sale of  Common  Stock,
Convertible  Securities,  warrants,  options or other rights to subscribe for or
purchase Common Stock or Convertible Securities:  (i) pursuant to employee stock
purchase  or  stock  option  ownership  plans  adopted  by the  Corporation  for
employees,  consultants  and/or directors of the Corporation and its affiliates;
(ii) pursuant to the terms of any Convertible Securities,  warrants,  options or
other rights to subscribe  for or purchase  granted,  issued or sold pursuant to
clause (ii) above; (iii) pursuant to the High Yield Debt and Equity Offering (as
defined in a Subordinated Loan and Security Agreement, dated as of September 22,
1997,  among  KMC  Telecom  Inc.  ("KMC")  and KMC  Telecom  II,  Inc.  and AT&T

<PAGE>
                                                                               8


Commercial  Finance  Corporation,  as in effect on the Series C Preferred  Stock
Issue Date) or a subsequent debt offering  occurring prior to December 31, 1998;
(iv) pursuant to the terms of any Convertible Securities,  warrants,  options or
other rights to subscribe  for or purchase  granted,  issued or sold pursuant to
clauses  (iii)  above;  (v)  pursuant to Section 10C of the Amended and Restated
Note  Purchase  and  Investment  Agreement,  dated as of October  22,  1996,  as
amended,  by and  among the  Corporation,  Nassau  Capital  Partners  L.P.,  NAS
Partners I L.L.C.  and Harold N.  Kamine;  or (vi)  pursuant to the  issuance of
Series  C  Cumulative  Convertible  Preferred  Stock  and  Series  D  Cumulative
Convertible  Preferred Stock pursuant to a Purchase Agreement,  by and among the
Corporation,  General Electric Capital Corporation,  CoreStates Holdings,  Inc.,
Nassau  Capital  Partners  L.P.,  NAS Partners I L.L.C.  and the issuance of any
shares of Common Stock issued in conversion thereof, PROVIDED that the aggregate
number of shares of Common Stock issued or issuable  pursuant to clauses (i) and
(ii) above shall not exceed 15% of the Common Stock (on a Fully  Diluted  basis)
outstanding from time to time and the aggregate number of shares of Common Stock
issued or issuable  pursuant to clause (iii) and (iv) above shall not exceed 11%
of the Common Stock (on a Fully Diluted  basis)  outstanding  from time to time;
and FURTHER  PROVIDED  that for the purposes of this Section  5(f):  (a) 221,500
shares of Common Stock initially allocated under the 1997 Stock Option Plan will
be deemed  outstanding  regardless of the number of shares actually  granted and
exercisable  thereunder  and (b) shares of Common Stock issued or issuable  upon
exercise of options not among the 221,500 shares initially allocated pursuant to
the 1997 Stock Option Plan and which, when issued, were subject to clause (i) or
(ii) above,  will not be deemed  outstanding,  regardless of whether or not they
have been granted or are exercisable.

          (g)   SUBDIVISION  OR  COMBINATION  OF  COMMON  STOCK.   In  case  the
Corporation  shall at any time subdivide (by any stock split,  stock dividend or
otherwise)  its  outstanding  shares of Common  Stock  into a greater  number of
shares,  the Conversion  Price in effect  immediately  prior to such subdivision
shall be  proportionately  reduced,  and,  conversely,  in case the  outstanding
shares of Common Stock shall be combined  into a smaller  number of shares,  the
Conversion  Price  in  effect  immediately  prior to such  combination  shall be
proportionately increased.

          (h) REORGANIZATION OR RECLASSIFICATION.  If any capital reorganization
or reclassification of the capital stock of the Corporation shall be effected in
such a way that  holders of Conunon  Stock shall be  entitled to receive  stock,
securities or assets with respect to or in exchange for Common Stock, then, as a
condition  of such  reorganization  or  reclassification,  lawful  and  adequate
provisions  shall be made  whereby  each holder of a share or shares of Series A
Preferred  Stock shall  thereupon have the right to receive,  upon the basis and
upon the terms and  conditions  specified  herein  and in lieu of the  shares of
Common Stock  immediately  theretofore  receivable  upon the  conversion of such
share or shares of Series A Preferred Stock, such shares of stock, securities or
assets as may be issued or payable  with  respect to or in exchange for a number
of outstanding shares of such Common Stock equal to the number of shares of such
Common Stock  immediately  theretofore  receivable upon such conversion had such
reorganization  or  reclassification  not  taken  place,  and in any  such  case
appropriate provisions shall be made with respect to the rights and interests of
such  holder  to  the  end  that  the  provisions  hereof  (including,   without
limitation, provisions for adjustments of the Conversion Price) shall thereafter
be  applicable,  as  nearly  as may be,  in  relation  to any  shares  of stock,
securities or assets thereafter deliverable upon the exercise of such conversion
rights.


<PAGE>
                                                                               9


          (i) CARRYOVER. Notwithstanding any other provisions of this Section 5,
the  Corporation  shall not be required to make any adjustment to the Conversion
Price unless such  adjustment  would require an increase or decrease of at least
one percent (1%) in the Conversion Price. Any lesser adjustment shall be carried
forward and shall be made no later than the time of, and together with, the next
subsequent  adjustment  which,  together with any  adjustment or  adjustments so
carried forward, shall amount to an increase or decrease of at least one percent
(1%) in the Conversion Price.

          6. OTHER EVENTS. If the Corporation shall make any dividend (excluding
cash dividends payable out of accumulated  earnings and profits) or distribution
on the Common  Stock or issue any Common  Stock,  other  capital  stock or other
security of the Corporation or any rights or warrants to purchase or acquire any
such  security,  which  transaction  does not  result  in an  adjustment  to the
Conversion  Price  pursuant to the  foregoing  provisions of this Section 5, the
Board of Directors may consider  whether such action is of such a nature that an
adjustment to the Conversion  Price should  equitably be made in respect of such
transaction.  If the Board of Directors of the  Corporation  determines  that an
adjustment to the Conversion  Price should be made, an adjustment  shall be made
effective  as of such  date,  as  determined  by the Board of  Directors  of the
Corporation.  The  determination of the Board of Directors of the Corporation as
to whether such an adjustment to the  Conversion  Price should be made,  and, if
so, as to what adjustment should be made and when, shall be final and binding on
the Corporation and all stockholders of the Corporation.  The Corporation  shall
be entitled to make such  additional  adjustments  in the Conversion  Price,  in
addition to those  required by the  foregoing  provisions  of this Section 5, as
shall be  necessary  in order that any  dividend  or  distribution  in shares of
capital stock of the Corporation,  subdivision,  reclassification or combination
of shares of stock of the Corporation or any recapitalization of the Corporation
shall not be taxable to the holders of the Common Stock.

          (k) NOTICE OF ADJUSTMENT. Upon any adjustment of the Conversion Price,
then and in each such case the Corporation shall give written notice thereof, by
delivery in person,  certified or registered mail, return receipt requested,  or
facsimile  addressed  to each  holder  of shares  of  Series A  Preferred  Stock
affected by such  adjustment at the address of such holder as shown on the books
of the Corporation, which notice shall state the Conversion Price resulting from
such adjustment,  setting forth in reasonable  detail the method upon which such
calculation is based.

          6. VOTING RIGHTS.

          (a) The  holders  of Series A  Preferred  Stock,  except as  otherwise
required  under  Delaware law or as set forth below in this Section 6, shall not
be entitled or permitted to vote on any matter required or permitted to be voted
upon by the stockholders of the Corporation.

          (b) So long as the Series A Preferred Stock is outstanding, each share
of Series A Preferred  Stock shall entitle the holder thereof to vote, in person
or by proxy,  at a special  or annual  meeting  of  stockholders  or by  written
consent, on all matters voted on by holders of Common Stock voting together as a
single class with other  shares  entitled to vote  thereon,  except as otherwise
provided in Articles EIGHTH and NINTH of the Corporation's  Amended and Restated

<PAGE>
                                                                              10


Certificate  of  Incorporation.  With  respect to any such  vote,  each share of
Series A Preferred  Stock shall  entitle the holder  thereof to cast a number of
votes  equal to the number of votes  entitled to be cast by such holder had such
holder  converted such share of Series A Preferred Stock into Common Stock prior
to such vote (or, if earlier, the record date with respect to such vote).

          (c) Without  the prior  consent of the  holders of  two-thirds  of the
shares of the Series A Preferred  Stock then  outstanding,  voting as a separate
class, the Corporation shall not:

          (i)  increase  the  number  of shares  of the  Corporation's  Series A
Cumulative Convertible Preferred Stock, par value $.0l per share, outstanding at
any time to more than $12,800,000 of aggregate liquidation preference;

          (ii)  increase  the number of shares of  Preferred  Stock (of whatever
series) authorized or Common Stock authorized for issuance;

          (iii) merge or consolidate  with or into any other company,  person or
entity,  unless  holders  of each  share of  Series A  Preferred  Stock  receive
consideration  in an amount  equal to at least the greater of (A) the product of
(x) the number of shares of Common  Stock  into  which  such  shares of Series A
Preferred Stock is then convertible and (y) the  consideration to be received by
holders of each share of Common Stock  pursuant to such merger or  consolidation
and (B) the  Liquidation  Preference,  of such share of Series A Preferred Stock
plus all accumulated but unpaid dividends thereon (whether or not declared);

          (iv) amend,  modify or repeal the powers,  preferences or rights of or
the  restrictions  provided for the benefit of holders of the Series A Preferred
Stock or the Common  Stock if such  action  would  affect the Series A Preferred
Stock or the Common Stock adversely;

          (v)  sell or  otherwise  dispose  of all or  substantially  all of the
assets of the  Corporation  in any  single  transaction  or  series  of  related
transactions  unless  the  holders  of each  share of Series A  Preferred  Stock
receive consideration in an amount equal to at least the Liquidation  Preference
of such  share of Series A  Preferred  Stock  plus all  accumulated  but  unpaid
dividends thereon (whether or not declared);

          (vi)  declare or pay any  dividend on shares of Common  Stock or other
equity  securities of the  Corporation  ranking  junior to the Parity  Preferred
Stock  (excluding  dividends  payable  solely in shares of Common Stock or other
equity  securities of the  Corporation  ranking  junior to the Parity  Preferred
Stock);

          (vii)   authorize  or  enter  into  any   transaction   or  series  of
transactions  (excluding  transactions  authorized  by  the  Corporation  or its
subsidiaries prior to the Series C Preferred Stock Issue Date and any amendments
thereto  that do not alter the  economic  value of such  transactions)  with any
director  or  executive  officer of the  Corporation  or any Person  directly or
indirectly  controlling the  Corporation (or any affiliate  thereof other than a
subsidiary  of the  Corporation)  if  the  aggregate  amount  involved  in  such

<PAGE>
                                                                              11


transaction  or  series  of  transactions  involves  the  payment  by or to  the
Corporation or its  subsidiaries of more than $100,000 in any one fiscal year of
the Corporation; or

          (viii) issue Common Stock or Convertible  Securities as  consideration
for  assets  comprising  a business  that is not  within  the lines of  business
conducted  by  the  Corporation  or  any  of  its  subsidiaries  (or  operations
reasonably ancillary thereto) on the Series C Preferred Stock Issue Date.

          (d) Without  the  consent of each  holder of Series A Preferred  Stock
affected thereby, the Corporation shall not reduce the Liquidation Preference of
the Series A Preferred Stock or the rate at which dividends  accumulate thereon,
or modify the dividend cumulation  provisions of the Series A Preferred Stock or
the times and prices at which the Series A Preferred  Stock may be redeemed in a
manner that would be adverse to the holders of Series A Preferred Stock.

          7.  REISSUANCE  OF  SERIES  A  PREFERRED  STOCK.  Shares  of  Series A
Preferred  Stock that have been issued and  reacquired  in any manner  including
shares  purchased or redeemed or exchanged or converted,  shall (upon compliance
with any  applicable  provisions  of the laws of  Delaware)  have the  status of
authorized and unissued shares of preferred stock  undesignated as to series and
may be redesignated and reissued as part of any series of preferred stock (other
than Series A Preferred Stock).

          8. BUSINESS DAY. If any payment or conversion shall be required by the
terms  hereof to be made on a day that is not a Business  Day,  such  payment or
conversion shall be made on the immediately succeeding Business Day.

          9.  DEFINITIONS.  As used  in this  Certificate  of  Designation,  the
following  terms shall have the  following  meanings  (with terms defined in the
singular  having  comparable  meanings  when used in the plural and vice versa),
unless the context otherwise requires:

          "1997 Stock Option Plan" shall mean the 1997 Stock Purchase and Option
Plan for Key Employees of KMC Telecom Holdings, Inc. and affiliates, as the same
may be amended from time to time.

          "Board of  Directors"  shall have the  meaning  ascribed  to it in the
first paragraph of this Resolution.

          "Business Day" means any day except a Saturday, a Sunday, or other day
on which  commercial banks in the State of New York or New Jersey are authorized
or required by law or executive order to close.

          "Capital Stock" means, with respect to any Person, any and all shares,
interests,  participations,  rights in, or other equivalents (however designated
and whether voting or non-voting) of, such Person's capital stock (but excluding
any debt  security that is  exchangeable  for or  convertible  into such capital
stock).

          "Conunon  Stock"  shall have the  meaning  ascribed to it in Section 2
hereof.


<PAGE>
                                                                              12


          "Convertible  Securities"  shall mean any  evidences of  indebtedness,
shares or securities convertible into or exchangeable for Common Stock.

          "Corporation"  shall  have the  meaning  ascribed  to it in the  first
paragraph of this Resolution.

          "Dividend  Payment  Date" means March 31,  June 30,  September  30 and
December 31 of each year.

          "Dividend  Period" means the Initial Dividend Period and,  thereafter,
each Quarterly Dividend Period.

          "Fair Market Value" per share of Common Stock as of a particular  date
(the  "Determination  Date")  shall mean:  (i) if the Common  Stock is listed or
admitted  for trading on a national  securities  exchange,  then the Fair Market
Value  shall be the  average of the last 30 "daily  sales  prices" of the Common
Stock on the principal national securities exchange on which the Common Stock is
listed  or  admitted  for  trading  on the last 30  Business  Days  prior to the
Determination  Date, or if not listed or traded on any such  exchange,  then the
Fair Market  Value shall be the average of the last 30 "daily  sales  prices" of
the Common  Stock on the Nasdaq  National  Market on the last 30  Business  Days
prior to the  Determination  Date (the "daily  sales price" shall be the closing
price for bona fide transactions of the Common Stock at the end of each day); or
(ii) if the  Common  Stock is not so  listed or  admitted  to  unlisted  trading
privileges or if no such sale is made on at least 25 of such days, then the Fair
Market Value shall be as  reasonably  determined  in good faith by the Company's
Board of  Directors  or a duly  appointed  committee  of the Board of  Directors
(which  determination  shall  be  reasonably  described  in the  written  notice
delivered,  and shall be reasonably  acceptable,  to the holders of the Series A
Preferred Stock).

          "Fully  Diluted"  shall  mean at any date as of which  the  number  of
shares  of  Common  Stock  is to be  determined,  all  shares  of  Common  Stock
outstanding  at such date and the  maximum  number  of  shares  of Common  Stock
issuable in respect of Convertible  Securities  and warrants,  options and other
rights  to  purchase   (directly  or  indirectly)  shares  of  Common  Stock  or
Convertible  Securities (giving effect to the then current respective conversion
prices) outstanding on such date (to the extent the rights to convert,  exchange
or exercise thereunder are presently exercisable).

          "High Yield Debt and Equity  Offering" shall have the meaning ascribed
to it in Section 5 hereof.

          "Initial Dividend Period" means the dividend period commencing on, and
including,  the  Series A  Prefer-red  Stock  Issue  Date  and  ending  on,  and
excluding, the first Dividend Payment Date to occur thereafter.

          "Junior  Stock"  shall have the  meaning  ascribed  to it in Section 2
hereof.


<PAGE>
                                                                              13


          "Liquidation  Preference"  shall have the  meaning  ascribed  to it in
Section 1 hereof.

          "Option"  shall mean rights,  options,  or warrants to  subscribe  for
purchase or otherwise acquire Convertible Securities or Common Stock.

          "Parity Preferred Stock" means,  collectively,  the Series A Preferred
Stock, the Series B Cumulative  Convertible  Preferred Stock, par value $.01 per
share, the Corporation's  Series C Cumulative  Convertible  Preferred Stock, par
value  $.0l  per  share,  the  Corporation's  Series  D  Cumulative  Convertible
Preferred  Stock,  par value  $.0l per share and any other  series of  preferred
stock  which is  determined  to be  "Parity  Preferred  Stock"  by the  Board of
Directors.

          "Person" means any individual, firm, corporation, partnership, limited
liability  company,  trust,  incorporated or unincorporated  association,  joint
venture, joint stock company, governmental body or other entity of any kind.

          "Qualified  Public  Offering"  shall mean the first  offer for sale of
Common  Stock  pursuant  to an  effective  registration  statement  filed by the
Corporation  under  the  Securities  Act of  1933,  as  amended,  in  which  the
Corporation  receives aggregate gross proceeds (before deduction of underwriting
discounts and expenses of sale) of at least  $40,000,000;  provided that the per
share price at which such shares are sold in the offering  (before  deduction of
underwriting  discounts  and  expenses  of sale) is at least  four (4) times the
Conversion Price then in effect.

          "Quarterly"  shall  mean the  quarterly  periods  commencing  on,  and
including,  each Dividend  Payment Date and ending on, and excluding,  each next
Dividend Payment Date occurring immediately thereafter, respectively.

          "Realization  Event" shall mean the  occurrence of (i) the sale of all
or  substantially   all  of  the  stock  or  assets  of  the  Corporation,   the
consolidation or merger of the Corporation  with one or more other  corporations
or (ii) the closing of an initial  public  offering of Common Stock in which the
Corporation  receives aggregate gross proceeds (before deduction of underwriting
discounts and expenses of sale) of at least $40,000,000.

          "Senior Preferred Stock" means,  collectively,  the Series E Preferred
Stock,  and the Series F Preferred Stock and any other series of preferred stock
which is determined to be "Senior  Preferred  Stock" by the Directors,  PROVIDED
that,  no Capital  Stock shall be  designated as such without the consent of the
holders of a majority of the shares of Series A Preferred Stock.

          "Series A Preferred  Stock"  shall have the meaning  ascribed to it in
Section 1 hereof.

          "Series A  Preferred  Stock  Issue Date" means the first date on which
the Series A Preferred Stock is issued by the Corporation.

          "Series C Preferred Stock" means the Corporation's Series C Cumulative
Convertible Preferred Stock, par value $.01 per share.


<PAGE>
                                                                              14


          "Series D Preferred Stock" means the Corporation's Series D Cumulative
Convertible Preferred Stock, par value, $.01 per share.

          "Series  E  Preferred  Stock"  means the  Series E Senior  Redeemable,
Exchangeable, PIK Preferred Stock.

          "Series  F  Preferred  Stock"  means the  Series F Senior  Redeemable,
Exchangeable, PIK Preferred Stock.

          "Shareholders  Agreement" means the Amended and Restated  Stockholders
Agreement among KMC Telecom  Holdings,  Inc.,  Nassau Capital Partners L.P., NAS
Partners I L.L.C.,  Harold N. Kamine, KMC  Telecommunications  L.P., AT&T Credit
Corporation,  General  Electric Capital  Corporation,  Corestates Bank, N.A. and
Corestates Holdings, Inc., dated as of October 31, 1997, as amended by Amendment
No.1,  dated as of January 7, 1998,  to the  Amended and  Restated  Stockholders
Agreement,  dated as of October 31, 1997,  Amendment  No. 2, dated as of January
26,  1998,  to the  Amended and  Restated  Stockholders  Agreement,  dated as of
October 31, 1997, Amendment No. 3, dated as of February 25, 1998, to the Amended
and Restated Stockholders Agreement, dated as of October 31, 1997, Amendment No.
4, dated as of  February  4, 1999,  to the  Amended  and  Restated  Stockholders
Agreement,  dated as of October 31, 1997, Amendment No. 5, dated as of April 30,
1999, to the Amended and Restated  Stockholders  Agreement,  dated as of October
31, 1997.






<PAGE>
                                                                              15


          IN WITNESS  WHEREOF,  KMC  TELECOM  HOLDINGS,  INC.  has  caused  this
certificate to be duly executed by its Chief Financial  Officer this 30th day of
April, 1999.


                                           KMC TELECOM HOLDINGS, INC



                                           By:      /S/ James D. Grenfell
                                                --------------------------------
                                                Name:   James D. Grenfell
                                                Title:  Chief Financial Officer






                           KMC TELECOM HOLDINGS, INC.

                           CERTIFICATE OF THE POWERS,
                   DESIGNATIONS, PREFERENCES AND RIGHTS OF THE
                SERIES C CUMULATIVE CONVERTIBLE PREFERRED STOCK,
                            PAR VALUE $.0l PER SHARE

                     Pursuant to Sections 141 and 151 of the
                General Corporation Law of the State of Delaware

          As contemplated  by Section 141 of the General  Corporation Law of the
State of Delaware (the "DGCL"), the following resolution was duly adopted by the
Board of Directors of KMC Telecom  Holdings,  Inc., a Delaware  corporation (the
"Corporation"), by unanimous written consent, dated April 30, 1999;

          WHEREAS,  the Board of Directors  of the  Corporation  is  authorized,
within the  limitations  and  restrictions  stated in the Amended  and  Restated
Certificate of  Incorporation  of the  Corporation,  to provide by resolution or
resolutions  for the issuance of shares of preferred  stock,  par value $.0l per
share, of the Corporation,  in one or more series with such voting powers,  full
or limited,  or without voting powers,  and such  designations,  preferences and
relative,  participating,  optional or other special rights, and qualifications,
limitations or  restrictions  as shall be stated and expressed in the resolution
or  resolutions  providing  for the  issuance  thereof  adopted  by the Board of
Directors,   and  as  are  not  stated  and  expressed  in  the  Certificate  of
Incorporation,  or any amendment  thereto,  including (but without  limiting the
generality  of the  foregoing)  such  provisions  as may be  desired  concerning
voting,  redemption,  dividends,  dissolution or the  distribution of assets and
such other  subjects or matters as may be fixed by resolution or  resolutions of
the Board of Directors under the DGCL;

<PAGE>

          WHEREAS,  the Board of Directors of the  Corporation,  pursuant to its
authority under Section 151 of the DGCL,  desires to authorize and fix the terms
of its Series C Cumulative Convertible Preferred Stock; and

          WHEREAS, the Board of Directors of the Corporation has determined that
such Series C Cumulative  Convertible  Preferred Stock shall constitute  "Parity
Preferred  Stock"  within  the  meaning  of  the  Certificates  of  the  Powers,
Designations,  Preferences and Rights of the  Corporation's  Series A Cumulative
Convertible Preferred Stock, Series B Cumulative Convertible Preferred Stock and
Series D Cumulative Convertible Preferred Stock;


          NOW, THEREFORE, BE IT RESOLVED:

          1. DESIGNATION AND NUMBER OF SHARES. There shall be hereby established
a series of  preferred  stock  designated  as "Series C  Cumulative  Convertible
Preferred  Stock" (such Series  being  hereinafter  referred to as the "Series C
Preferred  Stock").  The authorized number of shares of Series C Preferred Stock
shall be 350,000.  The  liquidation  preference of the Series C Preferred  Stock
shall be $100 per share (the "Liquidation Preference").

          2. RANK. The Series C Preferred Stock shall,  with respect to dividend
distributions  and   distributions   upon  the  liquidation,   winding-up,   and
dissolution of the  Corporation,  rank (i) senior to the Common Stock, par value
$.0l per share, of the Corporation (the "Common  Stock");  (ii) on a parity with
(A) each class or series of Capital  Stock,  other than the Common Stock and the
Senior  Preferred Stock, and (B) the Parity Preferred Stock; and (iii) junior to
the Senior  Preferred  Stock (the  Common  Stock and the  classes  and series of
Capital Stock described in clause (ii) of this Section are collectively referred
to as the "Junior Stock"). The Series C Preferred Stock shall also, with respect
to any redemption or repurchase by the  Corporation  of its Capital Stock,  rank
junior with respect to the Senior Preferred Stock, except as provided in Section
3 of the Shareholders Agreement.

          3. DIVIDENDS.

          (a) Beginning on the date of issuance of the Series C Preferred Stock,
the  holders of the  outstanding  shares of Series C  Preferred  Stock  shall be
entitled to receive,  when,  as and if declared by the Board of Directors of the
Corporation,  out of funds legally  available  therefor,  cash dividends on each
share  of  Series  C  Preferred  Stock at an  annual  rate  equal to 7.0% of the
Liquidation Preference,  payable quarterly in arrears on the applicable Dividend
Payment Date or the next  succeeding  Business Day, if the  applicable  Dividend
Payment Date is not a Business Day.  Notwithstanding the foregoing, the dividend
payable on each share of Series C  Preferred  Stock with  respect to the Initial


                                       2
<PAGE>

Dividend  Period  shall  be  equal  to (i)  7.0% of the  Liquidation  Preference
multiplied  by (ii) a  fraction  equal  to (A) the  number  of  days  from  (and
including)  the  Series C  Preferred  Stock  Issue Date to (but  excluding)  the
Dividend Payment Date with respect to the Initial Dividend Period divided by (B)
365. All dividends shall be cumulative,  whether or not earned or declared, from
the date of  issuance  of the  Series C  Preferred  Stock and  shall be  payable
quarterly in arrears on each  Dividend  Payment  Date,  commencing  on the first
Dividend  Payment  Date after the date of  issuance  of the  Series C  Preferred
Stock. If any dividend (or portion thereof) payable on any Dividend Payment Date
is not declared or paid in full on such  Dividend  Payment  Date,  the amount of
such dividend  payable that is not paid on such date shall  increase at the rate
of 7.0% per annum  (compounded  quarterly on each  subsequent  Dividend  Payment
Date) from such Dividend  Payment Date until paid in full. Each  distribution on
the  Series C  Preferred  Stock  shall be  payable  to holders of record as they
appear on the stock books of the Corporation on such record dates, not less than
ten (10) nor more than sixty (60) days  preceding the related  Dividend  Payment
Date, as shall be fixed by the Board of Directors of the Corporation.


          (b) All  accumulated  and unpaid  dividends  on the Series C Preferred
Stock shall be paid by the  Corporation  upon the  occurrence  of a  Realization
Event,  without  reference to any regular  Dividend  Payment Date, to holders of
record on such date. The Corporation shall send by first class,  postage prepaid
mail a notice of the  Realization  Event to all  holders  of Series C  Preferred
Stock that are entitled to receive such dividends.  In the case of a Realization
Event which is an initial  public  offering,  if any such holder  gives  written
notice to the  Corporation  that such holder wishes to receive such  accumulated
unpaid  dividends  in the form of shares of  Common  Stock in lieu of cash,  the
Corporation,  in lieu of a cash  payment,  shall  issue to such  holder  on such
Dividend  Payment Date, a number of shares of Common Stock equal to the quotient
obtained by dividing (x) the aggregate  accumulated and unpaid  dividends on the
shares of Series C Preferred Stock held by such holder by (y) the price at which
shares  of  Common  Stock  are  sold  in  such  offering  (before  deduction  of
underwriting discounts and expenses of sale).

          (c) All  dividends  paid with  respect to shares of Series C Preferred
Stock  pursuant to Section 3(a) shall be paid pro rata and in like manner to all
of the holders entitled thereto.

          (d) Except as  otherwise  provided  in  paragraph  (b) above,  nothing
herein  contained  shall in any way or under any  circumstances  be construed or
deemed to require the Board of Directors of the  Corporation to declare,  or the
Corporation  to pay or set apart for  payment,  any  dividends  on shares of the
Series C Preferred  Stock at any time,  nor to permit the Board of  Directors of
the Corporation to declare,  or the Corporation to pay or set apart for payment,
any dividends on shares of the Series C Preferred  Stock prior to the payment of
any dividends accrued on shares of the Senior Preferred Stock.

          (e)  Whenever  the  provisions  hereof  require  that  the  amount  of
dividends  with respect to the Series C Preferred  Stock be determined  for less
than a full  quarterly  period ending on a Dividend  Payment Date, the amount of
dividends for such period shall be equal to 7.0% of the  Liquidation  Preference


                                       3
<PAGE>

multiplied  by a fraction  equal to (i) the number of days from (and  including)
the most recent  Dividend  Payment Date to (but  excluding)  the last day of the
period in respect of which such determination is being made divided by (ii) 365.


          4. LIQUIDATION PREFERENCE.

          (a)  In  the  event  of  any  voluntary  or  involuntary  liquidation,
dissolution  or  winding-up  of the affairs of the  Corporation,  the holders of
shares of Parity  Preferred Stock  (including the Series C Preferred Stock) then
outstanding shall be entitled to be paid for each share held thereby, out of the
assets of the Corporation  available for  distribution to its  stockholders,  an
amount in cash equal to the Liquidation  Preference plus an amount in cash equal
to  all  accumulated  and  unpaid  dividends  thereon  (calculated  pursuant  to
Paragraph  3(a)) to the date fixed for  liquidation,  dissolution  or winding-up
(including  an amount equal to a prorated  dividend for the period from the last
Dividend  Payment  Date  to the  date  fixed  for  liquidation,  dissolution  or
winding-up),  before any payment shall be made or any assets  distributed to the
holders of any shares of Junior Stock,  but after all liquidation  payments have
been made tot he  holders  of all shares of Senior  Preferred  Stock.  Except as
provided  in the  preceding  sentence,  holders  of the Parity  Preferred  Stock
(including  the  Series  C  Preferred  Stock)  shall  not  be  entitled  to  any
distribution in the event of any  liquidation,  dissolution or winding-up of the
affairs of the Corporation.  If the assets of the Corporation are not sufficient
to pay in full the  foregoing  liquidation  payments  payable to the  holders of
outstanding  shares  of the  Parity  Preferred  Stock  (including  the  Series C
Preferred  Stock),  then the  holders  of all shares of Parity  Preferred  Stock
(including   the  Series  C  Preferred   Stock)  shall  share  ratably  in  such
distribution  of assets in  accordance  with the amount that would be payable on
such  distribution if the amounts to which the holders of outstanding  shares of
Parity  Preferred  Stock  (including the Series C Preferred  Stock) are entitled
were paid in full. If all of the foregoing  liquidation payments with respect to
any share of Series C  Preferred  Stock  have been  made,  such share may not be
converted into Common Stock pursuant to Section 5.

          (b) For the purposes of this Section 4,  neither the  voluntary  sale,
conveyance,  exchange or transfer  (for cash,  shares of stocks,  securities  or
other  consideration)  of all or  substantially  all or part of the  property or
assets of the  Corporation  nor the  consolidation  or merger of the Corporation
with  one or more  other  corporations  shall  be  deemed  to be a  liquidation,
dissolution  or  winding-up,  voluntary  or  involuntary,  of the affairs of the
Corporation (unless such sale, conveyance, exchange or transfer is in connection
with  a   liquidation,   dissolution   or  winding-up  of  the  affairs  of  the
Corporation).

          5. CONVERSION.

          (a)  CONVERSION  PRICE.  Shares  of  Series  C  Preferred-Stock  to be
converted  into shares of Common  Stock shall be so  converted  at a  conversion
price  (which  price shall be adjusted to the nearest  fourth  decimal  place as
hereinafter  provided  and, as so adjusted,  is  hereinafter  referred to as the
"Conversion Price") equal to: (i) from the date of initial issuance of shares of
Series C Preferred  Stock to but  excluding  the  30-month  anniversary  of such
issuance,  $52.50  per  share of  Common  Stock,  with  each  share of  Series C


                                       4
<PAGE>

Preferred  Stock being valued at $100.00 for such  purpose;  PROVIDED,  HOWEVER,
that if a  Realization  Event  shall  occur  during  such  30-month  period  the
Conversion  Price shall equal to a fraction,  the  numerator of which is (A) the
consideration  per share of Common Stock (on a Fully Diluted basis)  received in
connection with such Realization Event, and the denominator of which is (B) 1.30
raised to a number equal to the number of years (or fraction  thereof)  from the
date of initial issuance of shares of Series C Preferred Stock until the date of
such Realization

Event, but in no case shall be greater than $52.50 per share of Common Stock nor
less  than  $42.18  per  share of  Common  Stock;  and (ii)  from and  after the
thirty-month  anniversary of the date of initial  issuance of shares of Series C
Preferred  Stock  (subject to paragraph  (b) below),  $42.18 per share of Common
Stock,  with each share of Series C Preferred  Stock being valued at $100.00 for
such purpose; provided,  however, that in no event shall the Conversion Price be
less than the par value, if any, of the Common Stock.

          (b) AUTOMATIC  CONVERSION  UPON A QUALIFIED  PUBLIC  OFFERING.  Upon a
Qualified  Public  Offering,  each  share of  Series  C  Preferred  Stock  shall
automatically  convert,  without  any action on the part of the holder  thereof,
into shares of Common Stock at the Conversion Price in effect at such time, plus
the right to receive an amount of cash equal to the accumulated unpaid dividends
on such share of Series C  Preferred  Stock to and  including  such date (or the
right to receive  additional  shares of Common  Stock in lieu of cash  dividends
pursuant to Section 3(b)).

          (c) CONVERSION AT THE OPTION OF THE HOLDER.  At any time and from time
to time prior to a Qualified Public Offering,  each holder of Series C Preferred
Stock shall have the right to convert such holder's shares of Series C Preferred
Stock, in whole or in part, into shares of Common Stock at the Conversion  Price
in effect at such time, plus the right to receive an amount of cash equal to the
accumulated  unpaid  dividends  on the  shares  of Series C  Preferred  Stock so
converted to and  including the  Conversion  Date (as defined  below);  provided
that, if such Conversion Date is prior to a Realization  Event,  the Corporation
may, in lieu of making a payment in cash equal to such amount,  deliver a number
of shares of Common Stock equal to such amount  divided by the Fair Market Value
of one share of Common Stock.  In order to convert  shares of Series C Preferred
Stock  pursuant to this Section 5(c) the holder  thereof shall  surrender at the
office  of the  Corporation  the  certificate  or  certificates  therefor,  duty
endorsed to the Corporation in blank, and give written notice to the Corporation
that such  holder  elects to  convert  such  shares  and shall  state in writing
therein  the name or names  (with  addresses)  in which such  holder  wishes the
certificate  or  certificates  of Common Stock to be issued.  Shares of Series C
Preferred  Stock shall be deemed to have been converted on the date of surrender
of such certificate or certificates as provided above (the  "Conversion  Date"),
and the  person or  persons  entitled  to  receive  the  shares of Common  Stock
issuable  upon such  conversion  shall be treated for all purposes as the record
holder or holders of such Common Stock on such date. As soon as  practicable  on
or after  the  Conversion  Date,  the  Corporation  shall  issue  and  deliver a
certificate  or  certificates  for the number of shares of Common Stock issuable
upon conversion.

          (d) FRACTIONAL SHARES; PARTIAL CONVERSION.  No fractional shares shall
be issued  upon  conversion  of shares of Series C  Preferred  stock into Common
Stock. In case the number of shares of Series C Preferred  Stock  represented by


                                       5
<PAGE>

the certificate or certificates  surrendered  pursuant to this Section 5 exceeds
the number of shares  converted,  the Corporation  shall,  upon such conversion,
execute  and deliver to the holder,  at the  expense of the  Corporation,  a new
certificate or certificates for the number of shares of Series C Preferred Stock
represented by the certificate or certificates  surrendered  which are not to be
converted.  If any  fractional  share of  Common  Stock  would,  except  for the
provisions of the first  sentence of this Section  5(d), be delivered  upon such
conversion, the Corporation, in lieu

of delivering such fractional  share,  shall pay to the holder  surrendering the
Series C Preferred  Stock for  conversion an amount in cash equal to the current
market price of such  fractional  share as determined in good faith by the Board
of Directors.

          (e)  ADJUSTMENT  OF  CONVERSION  PRICE UPON  ISSUANCE OF COMMON STOCK.
Except as  provided in Section  5(f),  if and  whenever  the  Corporation  shall
hereafter issue or sell, or is, in accordance  with  subsection  5(e)(1) through
5(e)(6),  deemed to have  issued  or sold,  any  shares  of  Common  Stock for a
consideration  per share less than the  Conversion  Price in effect  immediately
prior to the time of such  issue or sale,  then,  forthwith  upon such  issue or
sale, the Conversion  Price shall be reduced to the price determined by dividing
(i) an amount  equal to the sum of (a) the  number  of  shares  of Common  Stock
outstanding  immediately  prior  to such  issue or sale  (determined  on a Fully
Diluted  basis)  multiplied  by the then existing  Conversion  Price and (b) the
consideration,  if any,  received by the Corporation upon such issue or sale, by
(ii) the total number of shares of Common Stock  outstanding  immediately  after
such issue or sale (determined on a Fully Diluted basis).

          For purposes of this Section 5(e), the following  subsections  5(e)(1)
to 5(e)(6) shall also be applicable:

          5(e)(1)  ISSUANCE OF RIGHTS OR OPTIONS.  In case at any time hereafter
the Corporation  shall in any manner grant (whether directly or by assumption in
a merger or otherwise) any Options to purchase  Common Stock or any  Convertible
Securities,  whether or not such Options or the right to convert or exchange any
such Convertible Securities are immediately exercisable, and the price per share
for which Common Stock is issuable upon the exercise of such Options or upon the
conversion or exchange of such  Convertible  Securities  (determined by dividing
(i) the total  amount,  if any,  received or receivable  by the  Corporation  as
consideration  for the  granting of such  Options,  plus the  minimum  aggregate
amount of additional  consideration payable to the Corporation upon the exercise
of all  such  Options,  plus,  in the  case  of such  Options  which  relate  to
Convertible   Securities,   the   minimum   aggregate   amount   of   additional
consideration,  if any,  payable  upon  the  issue  or sale of such  Convertible
Securities  and upon the  conversion  or  exchange  thereof,  by (ii) the  total
maximum  number of shares of Common  Stock  issuable  upon the  exercise of such
Options or upon the  conversion or exchange of all such  Convertible  Securities
issuable  upon the exercise of such Options)  shall be less than the  Conversion
Price in effect  immediately  prior to the time of the granting of such Options,
then the total  maximum  number of shares  of  Common  Stock  issuable  upon the
exercise of such  Options or upon  conversion  or exchange of the total  maximum
amount of such Convertible Securities issuable upon the exercise of such Options
shall be deemed to have been  issued  for such price per share as of the date of
granting of such  Options or the  issuance of such  Convertible  Securities  and


                                       6
<PAGE>

thereafter  shall be deemed to be outstanding.  Except as otherwise  provided in
subsection 5(e)(3), no adjustment of the Conversion Price shall be made upon the
actual  issue  of such  Common  Stock  or of such  Convertible  Securities  upon
exercise  of such  Options or upon the actual  issue of such  Common  Stock upon
conversion or exchange of such Convertible Securities.

          5(e)(2)  ISSUANCE OF CONVERTIBLE  SECURITIES.  In case the Corporation
shall  hereafter in any manner issue  (whether  directly or by  assumption  in a
merger or otherwise) or

sell any  Convertible  Securities,  whether  or not the  rights to  exchange  or
convert any such  Convertible  Securities are immediately  exercisable,  and the
price per share for which  Common  Stock is  issuable  upon such  conversion  or
exchange  (determined by dividing (i) the total amount received or receivable by
the  Corporation  as  consideration  for the  issue or sale of such  Convertible
Securities,  plus the minimum aggregate amount of additional  consideration,  if
any, payable to the Corporation upon the conversion or exchange thereof, by (ii)
the total maximum  number of shares of Common Stock issuable upon the conversion
or  exchange  of all  such  Convertible  Securities)  shall  be  less  than  the
Conversion Price in effect  immediately prior to the time of such issue or sale,
then the total maximum number of shares of Common Stock issuable upon conversion
or  exchange  of all such  Convertible  Securities  shall be deemed to have been
issued  for such  price  per  share as of the date of the  issue or sale of such
Convertible  Securities  and  thereafter  shall  be  deemed  to be  outstanding,
provided  that (a) except as  otherwise  provided in  subparagraph  5(e)(3),  no
adjustment of the  Conversion  Price shall be made upon the actual issue of such
Common Stock upon conversion or exchange of such Convertible  Securities and (b)
if any such issue or sale of such  Convertible  Securities is made upon exercise
of any Options to purchase any such Convertible Securities for which adjustments
of the Conversion Price have been or are to be made pursuant to other provisions
of this Section 5(e), no further  adjustment  of the  Conversion  Price shall be
made by reason of such issue or sale.

          5(e)(3) CHANGE IN OPTION PRICE-OR  CONVERSION RATE. Upon the happening
of any of the following  events,  namely,  if the purchase price provided for in
any Option referred to in subsection 5(e)(1), the additional  consideration,  if
any,  payable  upon the  conversion  or exchange of any  Convertible  Securities
referred to in  subsection  5(e)(1) or 5(e)(2) or the rate at which  Convertible
Securities  referred to in subsection 5(e)(1) or 5(e)(2) are convertible into or
exchangeable  for Common  Stock  shall  change at any time  (including,  but not
limited to, changes under or by reason of provisions designed to protect against
dilution),  the  Conversion  Price in  effect  at the time of such  event  shall
forthwith be readjusted to the Conversion  Price which would have been in effect
at such  time had such  Options  or  Convertible  Securities  still  outstanding
provided for such changed purchase price, additional consideration or conversion
rate, as the case may be, at the time  initially  granted,  issued or sold,  but
only if as a result  of such  adjustment  the  Conversion  Price  then in effect
hereunder is thereby  reduced;  and on the termination of any such Option or any
such right to convert or exchange such  Convertible  Securities,  the Conversion
Price then in effect  hereunder  shall  forthwith be increased to the Conversion
Price which would have been in effect at the time of such  termination  had such
Option or Convertible Securities, to the extent outstanding immediately prior to
such termination, never been issued.

          5(e)(4)  CONSIDERATION  FOR STOCK. In case any shares of Common Stock,


                                       7
<PAGE>

Options  or  Convertible  Securities  shall  be  issued  or sold for  cash,  the
consideration received therefor shall be deemed to be the amount received by the
Corporation  therefor,  without deduction  therefrom of any expenses incurred or
any  underwriting  commissions or concessions paid or allowed by the Corporation
in  connection  therewith.  In case any  shares  of  Common  Stock,  Options  or
Convertible  Securities  shall be issued or sold for a consideration  other than
cash,  the  amount  of  the  consideration  other  than  cash  received  by  the
Corporation  shall be  deemed  to be the fair  value  of such  consideration  as
determined in good

faith by the Board of Directors,  without  deduction of any expenses incurred or
any  underwriting  commissions or concessions paid or allowed by the Corporation
in connection therewith.  In case any Options shall be issued in connection with
the issue and sale of other securities of the Corporation,  together  comprising
one integral transaction in which no specific consideration is allocated to such
Options by the parties thereto, such Options shall be deemed to have been issued
for such  consideration as determined in good faith by the Board of Directors of
the Corporation.

          5(e)(5)  RECORD DATE. In case the  Corporation  shall take a record of
the holders of its Common Stock for the purpose of entitling them (i) to receive
a dividend or other distribution payable in Common Stock, Options or Convertible
Securities  or (ii) to  subscribe  for or  purchase  Common  Stock,  options  or
Convertible Securities,  then such record date shall be deemed to be the date of
the issue or sale of the shares of Common  Stock  deemed to have been  issued or
sold  upon  the  declaration  of such  dividend  or the  making  of  such  other
distribution  or the  date of the  granting  of such  right of  subscription  or
purchase, as the case may be.

          5(e)(6)  TREASURY  SHARES.  The  number  of  shares  of  Common  Stock
outstanding  at any given time shall not include  shares owned or held by or for
the account of the Corporation,  and the disposition of any such shares shall be
considered  an issue or sale of Common  Stock for the  purpose  of this  Section
5(e).

          (f) EXCEPTIONS TO CONVERSION  PRICE  ADJUSTMENT.  Notwithstanding  the
foregoing,  no adjustment to the Conversion Price shall be made pursuant to this
Section 5 in  connection  with the  grant,  issuance  or sale of  Common  Stock,
Convertible  Securities,  warrants,  options or other rights to subscribe for or
purchase Common Stock or Convertible Securities:  (i) pursuant to employee stock
purchase  or  stock  option  ownership  plans  adopted  by the  Corporation  for
employees,  consultants  and/or directors of the Corporation and its affiliates;
(ii) pursuant to the terms of any Convertible Securities,  warrants,  options or
other rights to subscribe  for or purchase  granted,  issued or sold pursuant to
clause (ii) above; (iii) pursuant to the High Yield Debt and Equity Offering (as
defined in a Subordinated Loan and Security Agreement, dated as of September 22,
1997,  among  KMC  Telecom  Inc.  ("KMC")  and KMC  Telecom  II,  Inc.  and AT&T
Commercial  Finance  Corporation,  as in effect on the Series C Preferred  Stock
Issue Date) or a subsequent debt offering  occurring prior to December 31, 1998;
(iv) pursuant to the terms of any Convertible Securities,  warrants,  options or
other rights to subscribe  for or purchase  granted,  issued or sold pursuant to
clause (iii)  above;  or (v) pursuant to Section 10C of the Amended and Restated
Note  Purchase  and  Investment  Agreement,  dated as of October  22,  1996,  as
amended,  by and  among the  Corporation,  Nassau  Capital  Partners  L.P.,  NAS
Partners I L.L.C.  and Harold N. Kamine;  PROVIDED that the aggregate  number of


                                       8
<PAGE>

shares of Common Stock issued or issuable pursuant to clauses (i) and (ii) above
shall not exceed 15% of the Common Stock (on a Fully Diluted basis)  outstanding
from time to time and the  aggregate  number of shares of Common Stock issued or
issuable  pursuant  to clauses  (iii) and (iv) above shall not exceed 11% of the
Common  Stock (on a Fully  Diluted  basis)  outstanding  from time to time;  and
FURTHER  PROVIDED that for the purposes of this Section 5(f): (a) 221,500 shares
of Common  Stock  initially  allocated  under the 1997 Stock Option Plan will be
deemed  outstanding  regardless  of the number of shares  actually  granted  and
exercisable  thereunder  and (b) shares of Common Stock issued or issuable  upon
exercise of options not among the 221,500 shares initially allocated pursuant to
the 1997 Stock Option Plan and which,  when issued,  were subject to clauses (i)
or (ii) above, will not be deemed outstanding, regardless of whether or not they
have been granted or are exercisable.

          (g)   SUBDIVISION  OR  COMBINATION  OF  COMMON  STOCK.   In  case  the
Corporation  shall at any time subdivide (by any stock split,  stock dividend or
otherwise)  its  outstanding  shares of Common  Stock  into a greater  number of
shares,  the Conversion  Price in effect  immediately  prior to such subdivision
shall be  proportionately  reduced,  and,  conversely,  in case the  outstanding
shares of Common Stock shall be combined  into a smaller  number of shares,  the
Conversion  Price  in  effect  immediately  prior to such  combination  shall be
proportionately increased.

          (h) REORGANIZATION OR RECLASSIFICATION.  If any capital reorganization
or reclassification of the capital stock of the Corporation shall be effected in
such a way that  holders of Common  Stock shall be  entitled  to receive  stock,
securities or assets with respect to or in exchange for Common Stock, then, as a
condition of such reorganization or reclassification (but subject to Section 7),
lawful and adequate  provisions  shall be made whereby each holder of a share or
shares of Series C Preferred  Stock shall  thereupon  have the right to receive,
upon the basis and upon the terms and conditions specified herein and in lieu of
the  shares  of  Common  Stock  immediately   theretofore  receivable  upon  the
conversion of such share or shares of Series C Preferred  Stock,  such shares of
stock,  securities  or assets as may be issued or payable  with respect to or in
exchange  for a number of  outstanding  shares of such Common Stock equal to the
number of shares of such Common Stock  immediately  theretofore  receivable upon
such conversion had such reorganization or reclassification not taken place, and
in any such case appropriate provisions shall be made with respect to the rights
and interests of such holder to the end that the provisions  hereof  (including,
without  limitation,  provisions for adjustments of the Conversion  Price) shall
thereafter  be  applicable,  as nearly as may be, in  relation  to any shares of
stock,  securities or assets  thereafter  deliverable  upon the exercise of such
conversion rights.

          (i) CARRYOVER. Notwithstanding any other provisions of this Section 5,
the  Corporation  shall not be required to make any adjustment to the Conversion
Price unless such  adjustment  would require an increase or decrease of at least
one percent (1%) in the Conversion Price. Any lesser adjustment shall be carried
forward and shall be made no later than the time of, and together with, the next
subsequent  adjustment  which,  together with any  adjustment or  adjustments so
carried forward, shall amount to an increase or decrease of at least one percent
(1%) in the Conversion Price.



                                       9
<PAGE>

          (j)  OTHER  EVENTS.   If  the  Corporation  shall  make  any  dividend
(excluding  cash dividends  payable out of accumulated  earnings and profits) or
distribution on the Common Stock or issue any Common Stock,  other capital stock
or other  security of the  Corporation  or any rights or warrants to purchase or
acquire any such security, which transaction does not result in an adjustment to
the Conversion Price pursuant to the foregoing provisions of this Section 5, the
Board of Directors may consider  whether such action is of such a nature that an
adjustment to the Conversion  Price should  equitably be made in respect of such
transaction.  If the Board of Directors of the  Corporation  determines  that an
adjustment to the Conversion  Price should be made, an adjustment  shall be made
effective  as of such  date,  as  determined  by the Board of  Directors  of the
Corporation.  The  determination of the Board of Directors of the Corporation as
to whether such an adjustment to the  Conversion  Price should be made,  and, if
so, as to what adjustment should be made and when, shall be final and binding on
the Corporation and all stockholders of the Corporation.  The Corporation  shall
be entitled to make such  additional  adjustments  in the Conversion  Price,  in
addition to those  required by the  foregoing  provisions  of this Section 5, as
shall be  necessary  in order that any  dividend  or  distribution  in shares of
capital stock of the Corporation,  subdivision,  reclassification or combination
of shares of stock of the Corporation or any recapitalization of the Corporation
shall not be taxable to the holders of the Common Stock.

          (k) NOTICE OF ADJUSTMENT. Upon any adjustment of the Conversion Price,
then and in each such case the Corporation shall give written notice thereof, by
delivery in person,  certified or registered mail, return receipt requested,  or
facsimile  addressed  to each  holder  of shares  of  Series C  Preferred  Stock
affected by such  adjustment at the address of such holder as shown on the books
of the Corporation, which notice shall state the Conversion Price resulting from
such adjustment,  setting forth in reasonable  detail the method upon which such
calculation is based.

          6. VOTING RIGHTS.

          (a) The  holders  of Series C  Preferred  Stock,  except as  otherwise
required  under  Delaware law or as set forth below in this Section 6, shall not
be entitled or permitted to vote on any matter required or permitted to be voted
upon by the stockholders of the Corporation.

          (b) So long as the Series C Preferred Stock is outstanding, each share
of Series C Preferred  Stock shall entitle the holder thereof to vote, in person
or by proxy,  at a special  or annual  meeting  of  stockholders  or by  written
consent, on all matters voted on by holders of Common Stock voting together as a
single  class with other  shares  entitled to vote  thereon  except as otherwise
provided in Articles EIGHTH and NINTH of the Corporation's  Amended and Restated
Certificate  of  Incorporation.  With  respect to any such  vote,  each share of
Series C Preferred  Stock shall  entitle the holder  thereof to cast a number of
votes  equal to the number of votes  entitled to be cast by such holder had such
holder  converted such share of Series C Preferred Stock into Common Stock prior
to such vote (or, if earlier, the record date with respect to such vote).

          (c) Subject to Section 7, without the prior  consent of the holders of
two-thirds  of the shares of the  Series C  Preferred  Stock  then  outstanding,
voting as a separate class, the Corporation shall not:



                                       10
<PAGE>

          (i)  increase  the  number  of  shares  of  Series C  Preferred  Stock
outstanding  at any  time to more  than  $35,000,000  of  aggregate  Liquidation
Preference;

          (ii)  increase  the number of shares of  Preferred  Stock (of whatever
series) authorized for issuance;

          (iii)merge or consolidate  with or into any other  company,  person or
entity,  unless  holders  of each  share of  Series C  Preferred  Stock  receive
consideration  in an amount  equal to at least the greater of (A) the product of
(x) the  number of shares of Common  Stock  into  which  such  share of Series C
Preferred Stock is then convertible and (y) the  consideration to be received by
holders of each share of Common Stock  pursuant to such merger or  consolidation
and (B) the  Liquidation  Preference  of such share of Series C Preferred  Stock
plus all accumulated but unpaid dividends thereon (whether or not declared);

          (iv) amend,  modify or repeal the powers,  preferences or rights of or
the  restrictions  provided for the benefit of holders of the Series C Preferred
Stock or the Common  Stock if such  action  would  affect the Series C Preferred
Stock or the Common Stock adversely;

          (v)  sell or  otherwise  dispose  of all or  substantially  all of the
assets of the  Corporation  in any  single  transaction  or  series  of  related
transactions  unless  the  holders  of each  share of Series C  Preferred  Stock
receive consideration in an amount equal to at least the Liquidation  Preference
of such  share of Series C  Preferred  Stock  plus all  accumulated  but  unpaid
dividends thereon (whether or not declared);

          (vi)  declare or pay any  dividend on shares of Common  Stock or other
equity  securities of the  Corporation  ranking  junior to the Parity  Preferred
Stock  (excluding  dividends  payable  solely in shares of Common Stock or other
equity  securities of the  Corporation  ranking  junior to the Parity  Preferred
Stock);

          (vii)   authorize  or  enter  into  any   transaction   or  series  of
transactions  (excluding  transactions  authorized  by  the  Corporation  or its
subsidiaries prior to the Series C Preferred Stock Issue Date and any amendments
thereto  that do not alter the  economic  value of such  transactions)  with any
director  or  executive  officer of the  Corporation  or any Person  directly or
indirectly  controlling the  Corporation (or any affiliate  thereof other than a
subsidiary  of the  Corporation)  if  the  aggregate  amount  involved  in  such
transaction  or  series  of  transactions  involves  the  payment  by or to  the
Corporation or its  subsidiaries of more than $100,000 in any one fiscal year of
the Corporation; or

          (viii) issue Common Stock or Convertible  Securities as  consideration
for  assets  comprising  a business  that is not  within  the lines of  business
conducted  by  the  Corporation  or  any  of  its  subsidiaries  (or  operations
reasonably ancillary thereto) on the Series C Preferred Stock Issue Date.

          (d) Without  the  consent of each  holder of Series C Preferred  Stock
affected thereby, the Corporation shall not reduce the Liquidation Preference of
the Series C Preferred Stock or the rate at which dividends  accumulate thereon,
or modify the dividend cumulation  provisions of the Series C Preferred Stock or


                                       11
<PAGE>

the times and prices at which the Series C Prefer-red Stock may be redeemed in a
manner that would be adverse to the holders of Series C Preferred Stock.

          (e) In the event  that a Default  (as such term is defined in the Loan
Agreement  (as defined  below) as in effect as of the date  hereof)  relating to
payment  obligations  of  principal  and  interest  thereunder  has occurred and
continued  for a period  of 90 days  under the  Amended  and  Restated  Loan and
Security Agreement,  dated as of September 22, 1997, among KMC Telecom Inc., KMC
Telecom II, Inc. and AT&T Commercial Finance Corporation (the "Loan Agreement"),
the number of directors  constituting  the entire  Board of  Directors  shall be
increased by two individuals and the persons holding, from time to time, greater
than 50% of the  combined  voting  power of the  outstanding  shares of Series C
Preferred Stock and the outstanding  shares of Common Stock into which shares of
Series C Preferred Stock theretofore have been converted (the "Majority Series C
Holders") (for  themselves and on behalf of all  stockholders  holding shares of
Common  Stock into which  shares of Series C  Convertible  Preferred  Stock have
been,  or may be,  converted)  shall be entitled to elect two  individuals  (the
"Series C Directors")  to the Board of Directors.  Immediately  upon the cure of
such Default, the number of directors constituting the entire Board of Directors
shall be  reduced  by two  individuals  and the two  individuals  elected by the
Majority  Series C Holders  shall  resign or  automatically  be removed from the
Board of Directors.

          7.  OPTIONAL  REDEMPTION.  (a) The  outstanding  shares  of  Series  C
Preferred Stock shall be subject to redemption,  as hereinafter provided, at the
option of the  Corporation,  in whole  but not in part,  in  connection  with an
Acquisition  Event.  For  purposes  hereof,  "Acquisition  Event" shall mean any
merger or  consolidation  of the Corporation  with any other company,  person or
entity  (whether  or  not  the  Corporation  is the  entity  surviving  in  such
transaction)  as a result  of which  the  holders  of  shares  of  Common  Stock
(determined  on a fully  diluted  basis)  will hold less than a majority  of the
outstanding  shares of common  stock or other  equity  interests of the company,
person or entity resulting from such transaction (or any parent of such entity).

          (b) For each share of Series C Preferred  Stock  redeemed  pursuant to
this  Section 7, the  Corporation  shall be obligated on the date fixed for such
redemption  (the  "Redemption  Date"),  which date shall not be earlier than the
date of consummation of the applicable  Acquisition  Event, to pay to the holder
thereof (upon surrender by such holder at the Corporation's  principal office of
the certificate representing such share duty endorsed in blank or accompanied by
an appropriate form of assignment) an amount (the  "Redemption  Price") equal to
the greater of (A) the product of (x) the number of shares of Common  Stock into
which such share of Series C  Preferred  Stock is then  convertible  and (y) the
consideration  to be received by holders of each share of Common Stock  pursuant
to such  Acquisition  Event and (B) the Liquidation  Preference of such share of
Series C  Preferred  Stock plus all  accumulated  but unpaid  dividends  thereon
(whether or not declared).

          (c) Notice of any redemption of the Series C Preferred  Stock pursuant
to this Section 7 (specifying  the time and place of redemption,  the Redemption
Price,  the Conversion  Price and the date on and after which shares of Series C
Preferred  Stock may no longer be  converted)  shall be mailed by  certified  or
registered mail, return receipt requested,  to each holder of Series C Preferred


                                       12
<PAGE>

Stock,  at the address of such holder shown on the  Corporation's  records,  not
less than 30 nor more than 45 days prior to the Redemption Date.

          (d) If the  Corporation  holds and sets aside money  sufficient to Pay
the Redemption  Price of the Series C Preferred  Stock on the  Redemption  Date,
then on and after the  Redemption  Date:  (i) the  shares of Series C  Preferred
Stock  shall no longer be  convertible  into  shares of Common  Stock;  (ii) the
shares of Series C Preferred Stock will cease to be outstanding and dividends on
the Series C Preferred Stock will cease to be declared and paid,  whether or not
certificates  representing  the Series C Preferred  Stock have been delivered to
the  Corporation;  and (iii) all other  rights of the holder in respect  thereof
shall  terminate  (other  than the right to receive  the  Redemption  Price upon
delivery of such Series C Preferred Stock).

          8.  REISSUANCE  OF  SERIES  C  PREFERRED  STOCK.  Shares  of  Series C
Preferred  Stock that have been issued and  reacquired in any manner,  including
shares  purchased or redeemed or exchanged or converted,  shall (upon compliance
with any  applicable  provisions  of the laws of  Delaware)  have the  status of
authorized and unissued shares of preferred stock  undesignated as to series and
may be redesignated and reissued as part of any series of preferred stock (other
than Series C Preferred Stock).

          9. BUSINESS DAY. If any payment or conversion shall be required by the
terms  hereof  to made on a day that is not a  Business  Day,  such  payment  or
conversion shall be made on the immediately succeeding Business Day.

          10.  DEFINITIONS.  As used in this  Certificate  of  Designation,  the
following  terms shall have the  following  meanings  (with terms defined in the
singular  having  comparable  meanings  when used in the  plural  and vice versa
unless the context otherwise requires:

          "1997 Stock Option Plan" shall mean the 1997 Stock Purchase and Option
Plan for Key Employees of KMC Telecom Holdings, Inc. and Affiliates, as the same
may be amended from time to time.

          "Board of  Directors"  shall have the  meaning  ascribed  to it in the
first paragraph of this Resolution.

          "Business Day" means any day except a Saturday, a Sunday, or other day
on which  commercial banks in the State of New York or New Jersey are authorized
or required by law or executive order to close.

     "Capital  Stock"  means,  with  respect to any Person,  any and all shares,
interests,  participations,  rights in, or other equivalents (however designated
and whether voting or non-voting) of, such Person's capital stock (but excluding
any debt  security that is  exchangeable  for or  convertible  into such capital
stock).

     "Common Stock" shall have the meaning ascribed to it in Section 2 hereof.

     "Convertible  Securities" shall mean any evidences of indebtedness,  shares
or securities convertible into or exchangeable for Common Stock.



                                       13
<PAGE>

     "Corporation"  shall have the meaning ascribed to it in the first paragraph
of this Resolution.

     "Dividend  Payment Date" means March 31, June 30, September 30 and December
31 of each year.

     "Dividend Period" means the Initial Dividend Period and,  thereafter,  each
Quarterly Dividend Period.

     "Fair Market Value" per share of Common Stock as of a particular  date (the
"Determination  Date") shall mean: (i) if the Common Stock is listed or admitted
for trading on a national securities exchange,  then the Fair Market Value shall
be the average of the last 30 "daily  sales  prices" of the Common  Stock on the
principal  national  securities  exchange on which the Common Stock is listed or
admitted  for  trading on the last 30 Business  Days prior to the  Determination
Date,  or if not  listed or traded on any such  exchange,  then the Fair  Market
Value  shall be the  average of the last 30 "daily  sales  prices" of the Common
Stock on the Nasdaq  National  Market on the last 30 Business  Days prior to the
Determination  Date (the "daily sales price" shall be the closing price for bona
fide  transactions  of the Common Stock at the end of each day);  or (ii) if the
Common Stock is not so listed or admitted to unlisted  trading  privileges or if
no such sale is made on at least 25 of such  days,  then the Fair  Market  Value
shall be as reasonably  determined  by an investment  banking firm of recognized
national  standing selected in good faith by the Company's Board of Directors or
a duly appointed committee of the Board of Directors (which  determination shall
be reasonably  described in the written  notice  delivered to the holders of the
Series C Preferred Stock).

     "Fully  Diluted" shall mean at any date as of which the number of shares of
Common Stock is to be determined, all shares of Common Stock outstanding at such
date and the  maximum  number of shares of Common  Stock  issuable in respect of
Convertible  Securities  and  warrants,  options  and other  rights to  purchase
(directly  or  indirectly)  shares of  Common  Stock or  Convertible  Securities
(giving effect to the then current respective  conversion prices) outstanding on
such date (to the extent the fights to convert,  exchange or exercise thereunder
are presently exercisable).

     "High Yield Debt and Equity Offering" shall have the meaning ascribed to it
in Section 5 hereof

     "Initial  Dividend  Period" means the dividend  period  commencing  on, and
including, the Series C Preferred Stock Issue Date and ending on, and excluding,
the first Dividend Payment Date to occur thereafter.

     "Junior Stock" shall have the meaning ascribed to it in Section 2 hereof.

     "Liquidation Preference" shall have the meaning ascribed to it in Section 1
hereof.

     "Loan Agreement" shall have the meaning ascribed to it in Section 6 hereof.



                                       14
<PAGE>

     "Majority Series C Holders" shall have the meaning ascribed to in Section 6
hereof.

     "Option" shall mean rights,  options, or warrants to subscribe for purchase
or otherwise acquire Convertible Securities or Common Stock.

     "Parity Preferred Stock" means, collectively,  the Series A Preferred Stock
the  Corporation's  Series B Cumulative  Convertible  Preferred Stock, par value
$.0l per  share,  the  Series C  Preferred  Stock,  the  Corporation's  Series D
Cumulative  Convertible Preferred Stock, par value $.0l per share, and any other
series of preferred stock which is determined to be "Parity  Preferred Stock" by
the Board of Directors.

     "Person" means any  individual,  firm,  corporation,  partnership,  limited
liability  company,  trust,  incorporated or unincorporated  association,  joint
venture, joint stock company, governmental body or other entity of any kind.

     "Qualified  Public  Offering" shall mean the offer for sale of Common Stock
pursuant to an effective  registration  statement filed by the Corporation under
the Securities Act of 1933, as amended,  in any single  transaction or series of
related transactions, in which the Corporation receives aggregate gross proceeds
(before  deduction of  underwriting  discounts and expenses of sale) of at least
$40,000,000  in the  aggregate;  provided that the per share price at which such
shares are sold in the offering (before deduction of underwriting  discounts and
expenses  of sale) is at least four times the  conversion  price of the Series A
Preferred  Stock  which  would then be in effect if  determined  pursuant to the
terms of the Series A Preferred Stock in effect on the initial  issuance date of
the Series C  Preferred  Stock  (whether or not any shares of Series A Preferred
Stock are then outstanding).

     "Quarterly" shall mean the quarterly periods  commencing on, and including,
each  Dividend  Payment Date and ending on, and  excluding,  each next  Dividend
Payment Date occurring immediately thereafter, respectively.


                                       15
<PAGE>


     "Realization  Event"  shall mean the  occurrence  of (i) the sale of all or
substantially  all of the  Common  Stock or  assets  of the  Corporation  or the
consolidation or merger of the Corporation with one or more other  corporations,
in any single transaction or series of related transactions, or (ii) the closing
of one or more  public  offerings  of  Common  Stock  in which  the  Corporation
receives  aggregate gross proceeds (before  deduction of underwriting  discounts
and expenses of sale) of at least $40,000,000.

     "Senior Preferred Stock" means, collectively, the Series E Preferred Stock,
and the Series F Preferred  Stock and any other series of preferred  stock which
is determined to be "Senior Preferred Stock" by the Directors, provided that, no
Capital Stock shall be designated as such without the consent of the majority of
the holders of Series C Preferred Stock.

     "Series A Preferred  Stock"  means the  Corporation's  Series A  Cumulative
Convertible Preferred Stock, par value, $.0l per share.

     "Series C  Directors"  shall have the  meaning  ascribed to it in Section 6
hereof.

     "Series C Preferred Stock" shall have the meaning ascribed to it in Section
1 hereof.

     "Series C  Preferred  Stock  Issue  Date" means the first date on which the
Series C Preferred Stock is issued by the Corporation.

     "Series D Preferred  Stock"  means the  Corporation's  Series D  Cumulative
Convertible Preferred Stock, par value, $.01 per share.

     "Series  E  Preferred   Stock"  means  the  Series  E  Senior   Redeemable,
Exchangeable, PIK Preferred Stock.

     "Series  F  Preferred   Stock"  means  the  Series  F  Senior   Redeemable,
Exchangeable, PIK Preferred Stock.

     "Shareholders  Agreement"  means  the  Amended  and  Restated  Stockholders
Agreement among KMC Telecom  Holdings,  Inc.,  Nassau Capital Partners L.P., NAS
Partners I L.L.C.,  Harold N. Kamine, KMC  Telecommunications  L.P., AT&T Credit
Corporation,  General  Electric Capital  Corporation,  Corestates Bank, N.A. and
Corestates Holdings, Inc., dated as of October 31, 1997, as amended by Amendment
No.1,  dated as of January 7, 1998,  to the  Amended and  Restated  Stockholders
Agreement,  dated as of October 31, 1997,  Amendment  No. 2, dated as of January
26,  1998,  to the  Amended and  Restated  Stockholders  Agreement,  dated as of
October 31, 1997, Amendment No. 3, dated as of February 25, 1998, to the Amended
and Restated Stockholders Agreement, dated as of October 31, 1997, Amendment No.
4, dated as of  February  4, 1999,  to the  Amended  and  Restated  Stockholders
Agreement,  dated as of October 31, 1997, Amendment No. 5, dated as of April 30,
1999, to the Amended and Restated  Stockholders  Agreement,  dated as of October
31, 1997.




                                       16
<PAGE>







































                                       17
<PAGE>




          IN WITNESS  WHEREOF,  KMC  TELECOM  HOLDINGS,  INC.  has  caused  this
certificate to be duly  executed  by its Chief  Financial  Officer this 30th day
of April, 1999.

                                                KMC TELECOM HOLDINGS. INC.


                                                By:  s/  James D. Grenfell
                                                    ------------------------
                                                Name:    James D. Grenfell
                                                Title:   Chief Financial Officer




                                       18



                           KMC TELECOM HOLDINGS, INC.

                           CERTIFICATE OF THE POWERS,
                   DESIGNATIONS, PREFERENCES AND RIGHTS OF THE
                SERIES D CUMULATIVE CONVERTIBLE PREFERRED STOCK,
                            PAR VALUE $.0l PER SHARE

                     Pursuant to Sections 141 and 151 of the
                General Corporation Law of the State of Delaware

                  As contemplated by Section 141 of the General  Corporation Law
of the State of Delaware (the "DGCL"), the following resolution was duly adopted
by the Board of Directors of KMC Telecom Holdings,  Inc., a Delaware corporation
(the "Corporation"), by unanimous written consent, dated April 30, 1999;

                  WHEREAS,   the  Board  of  Directors  of  the  Corporation  is
authorized,  within the limitations and  restrictions  stated in the Amended and
Restated  Certificate  of  Incorporation  of  the  Corporation,  to  provide  by
resolution or  resolutions  for the issuance of shares of preferred  stock,  par
value $.01 per share, of the Corporation, in one or more series with such voting
powers,  full or  limited,  or without  voting  powers,  and such  designations,
preferences and relative,  participating,  optional or other special rights, and
qualifications,  limitations or restrictions as shall be stated and expressed in
the resolution or resolutions  providing for the issuance thereof adopted by the
Board of Directors,  and as are not stated and expressed in the  Certificate  of
Incorporation,  or any amendment  thereto,  including (but without  limiting the
generality  of the  foregoing)  such  provisions  as may be  desired  concerning
voting,  redemption,  dividends,  dissolution or the  distribution of assets and
such other  subjects or matters as may be fixed by resolution or  resolutions of
the Board of Directors under the DGCL;


<PAGE>

                  WHEREAS,  the Board of Directors of the Corporation,  pursuant
to its authority under Section 151 of the DGCL, desires to authorize and fix the
terms of its Series D Cumulative Convertible Preferred Stock; and

                  WHEREAS,  the  Board  of  Directors  of  the  Corporation  has
determined  that such  Series D  Cumulative  Convertible  Preferred  Stock shall
constitute  "Parity  Preferred  Stock" within the meaning of the Certificates of
the Powers,  Designations,  Preferences and Rights of the Corporation's Series A
Cumulative   Convertible  Preferred  Stock,  Series  B  Cumulative   Convertible
Preferred Stock and Series C Preferred Stock;

                  NOW, THEREFORE, BE IT RESOLVED:

                  1.  Designation  and Number of Shares.  There  shall be hereby
established  a series of  preferred  stock  designated  as "Series D  Cumulative
Convertible  Preferred Stock" (such Series being hereinafter  referred to as the
"Series  D  Preferred  Stock").  The  authorized  number  of  shares of Series D
Preferred  Stock shall be 25,000.  The  liquidation  preference  of the Series D
Preferred Stock shall be $100 per share (the "Liquidation Preference").

                  2. Rank. The Series D Preferred  Stock shall,  with respect to
dividend distributions and distributions upon the liquidation,  winding-up,  and
dissolution of the  Corporation,  rank (i) senior to the Common Stock, par value
$.0l per share, of the Corporation (the "Common  Stock");  (ii) on a parity with
(A) each class or series of Capital  Stock,  other than the Common Stock and the
Senior  Preferred Stock, and (B) the Parity Preferred Stock; and (iii) junior to
the Senior  Preferred  Stock (the  Common  Stock and the  classes  and series of
Capital Stock described in clause (ii) of this Section are collectively referred
to as the "Junior Stock"). The Series D Preferred Stock shall also, with respect
to any redemption or repurchase by the  Corporation  of its Capital Stock,  rank
junior with respect to the Senior Preferred Stock, except as provided in Section
3 of the Shareholders Agreement.

                  3.       Dividends.

                  (a)  Beginning  on  the  date  of  issuance  of the  Series  D
Preferred  Stock,  the holders of the  outstanding  shares of Series D Preferred
Stock shall be entitled  to  receive,  when,  as and if declared by the Board of
Directors of the  Corporation,  out of funds legally  available  therefor,  cash
dividends  on each share of Series D Preferred  Stock at an annual rate equal to
7.0%  of  the  Liquidation  Preference,  payable  quarterly  in  arrears  on the
applicable  Dividend  Payment Date or the next  succeeding  Business Day, if the
applicable  Dividend  Payment Date is not a Business  Day.  Notwithstanding  the
foregoing,  the dividend  payable on each share of Series D Preferred Stock with
respect  to the  Initial  Dividend  Period  shall  be  equal  to (i) 7.0% of the
Liquidation  Preference multiplied by (ii) a fraction equal to (A) the number of
days from (and  including)  the  Series D  Preferred  Stock  Issue  Date to (but

                                       2
<PAGE>

excluding) the Dividend Payment Date with respect to the Initial Dividend Period
divided by (B) 365. All dividends shall be cumulative,  whether or not earned or
declared, from the date of issuance of the Series D Preferred Stock and shall be
payable  quarterly in arrears on each Dividend  Payment Date,  commencing on the
first Dividend Payment Date after the date of issuance of the Series D Preferred
Stock. If any dividend (or portion thereof) payable on any Dividend Payment Date
is not declared or paid in full on such  Dividend  Payment  Date,  the amount of
such dividend  payable that is not paid on such date shall  increase at the rate
of 7.0% per annum  (compounded  quarterly on each  subsequent  Dividend  Payment
Date) from such Dividend  Payment Date until paid in full. Each  distribution on
the  Series D  Preferred  Stock  shall be  payable  to holders of record as they
appear on the stock books of the Corporation on such record dates, not less than
ten (10) nor more than sixty (60) days  preceding the related  Dividend  Payment
Date, as shall be fixed by the Board of Directors of the Corporation.

                  (b) All  accumulated  and  unpaid  dividends  on the  Series D
Preferred  Stock  shall  be paid by the  Corporation  upon the  occurrence  of a
Realization  Event,  without  reference to any regular Dividend Payment Date, to
holders  of record on such date.  The  Corporation  shall  send by first  class,
postage prepaid mail a notice of the Realization  Event to all holders of Series
D Preferred Stock that are entitled to receive such dividends.  In the case of a
Realization Event which is an initial public offering,  if any such holder gives
written  notice to the  Corporation  that such  holder  wishes to  receive  such
accumulated  unpaid  dividends  in the form of shares of Common Stock in lieu of
cash, the Corporation,  in lieu of a cash payment, shall issue to such holder on
such  Dividend  Payment  Date,  a number of shares of Common  Stock equal to the
quotient obtained by dividing (x) the aggregate accumulated and unpaid dividends
on the shares of Series D  Preferred  Stock held by such holder by (y) the price
at which shares of Common Stock are sold in such offering  (before  deduction of
underwriting discounts and expenses of sale).

                  (c) All  dividends  paid  with  respect  to shares of Series D
Preferred  Stock  pursuant  to  Section  3(a) shall be paid pro rata and in like
manner to all of the holders entitled thereto.

                  (d)  Except as  otherwise  provided  in  paragraph  (b) above,
nothing  herein  contained  shall  in any  way or  under  any  circumstances  be
construed  or deemed to require the Board of  Directors  of the  Corporation  to
declare,  or the  Corporation to pay or set apart for payment,  any dividends on
shares of the Series D Preferred  Stock at any time,  nor to permit the Board of
Directors of the Corporation to declare,  or the Corporation to pay or set apart
for payment,  any  dividends on shares of the Series D Preferred  Stock prior to
the payment of any dividends accrued on shares of the Senior Preferred Stock.

                  (e) Whenever the provisions  hereof require that the amount of
dividends  with respect to the Series D Preferred  Stock be determined  for less
than a full  quarterly  period ending on a Dividend  Payment Date, the amount of
dividends for such period shall be equal to 7.0% of the  Liquidation  Preference
multiplied  by a fraction  equal to (i) the number of days from (and  including)
the most recent  Dividend  Payment Date to (but  excluding)  the last day of the
period in respect of which such determination is being made divided by (ii) 365.

                                       3
<PAGE>

                  4.       Liquidation Preference.

                  (a) In the event of any voluntary or involuntary  liquidation,
dissolution  or  winding-up  of the affairs of the  Corporation,  the holders of
shares of Parity  Preferred Stock  (including the Series D Preferred Stock) then
outstanding shall be entitled to be paid for each share held thereby, out of the
assets of the Corporation  available for  distribution to its  stockholders,  an
amount in cash equal to the Liquidation  Preference plus an amount in cash equal
to  all  accumulated  and  unpaid  dividends  thereon  (calculated  pursuant  to
Paragraph  3(a)) to the date fixed for  liquidation,  dissolution  or winding-up
(including  an amount equal to a prorated  dividend for the period from the last
Dividend  Payment  Date  to the  date  fixed  for  liquidation,  dissolution  or
winding-up),  before any payment shall be made or any assets  distributed to the
holders of any shares of Junior Stock,  but after all liquidation  payments have
been made to the  holders of all  shares of Senior  Preferred  Stock.  Except as
provided  in the  preceding  sentence,  holders  of the Parity  Preferred  Stock
(including  the  Series  D  Preferred  Stock)  shall  not  be  entitled  to  any
distribution in the event of any  liquidation,  dissolution or winding-up of the
affairs of the Corporation.  If the assets of the Corporation are not sufficient
to pay in full the  foregoing  liquidation  payments  payable to the  holders of
outstanding  shares  of the  Parity  Preferred  Stock  (including  the  Series D
Preferred  Stock),  then the  holders  of all shares of Parity  Preferred  Stock
(including   the  Series  D  Preferred   Stock)  shall  share  ratably  in  such
distribution  of assets in  accordance  with the amount that would be payable on
such  distribution if the amounts to which the holders of outstanding  shares of
Parity  Preferred  Stock  (including the Series D Preferred  Stock) are entitled
were paid in full. If all of the foregoing  liquidation payments with respect to
any share of Series D  Preferred  Stock  have been  made,  such share may not be
converted into Common Stock pursuant to Section 5.

                  (b) For the purposes of this Section 4, neither the  voluntary
sale, conveyance,  exchange or transfer (for cash, shares of stocks,  securities
or other  consideration)  of all or substantially all or part of the property or
assets of the  Corporation  nor the  consolidation  or merger of the Corporation
with  one or more  other  corporations  shall  be  deemed  to be a  liquidation,
dissolution  or  winding-up,  voluntary  or  involuntary,  of the affairs of the
Corporation (unless such sale, conveyance, exchange or transfer is in connection
with  a   liquidation,   dissolution   or  winding-up  of  the  affairs  of  the
Corporation).

                  4A.      Conversion into Series C Preferred Stock

                  At any time prior to a Qualified Public Offering,  each holder
of Series D Preferred  Stock shall have the right to convert  all,  but not less
than all, of such holder's shares of Series D Preferred Stock (together with all
accumulated  unpaid  dividends  thereon to the date of conversion) into an equal
number of shares of Series C  Preferred  Stock  (together  with all  accumulated
unpaid dividends thereon to the date of conversion).  In order to convert shares
of Series D Preferred Stock pursuant to this Section 4A the holder thereof shall
surrender  at the office of the  Corporation  the  certificate  or  certificates
therefor,  duty endorsed to the Corporation in blank, and give written notice to
the  Corporation  that such holder elects to convert such shares and shall state
in writing  therein  the name or names  (with  addresses)  in which such  holder
wishes the certificate or certificates of Series C Preferred Stock to be issued.

                                       4
<PAGE>

Shares of Series D Preferred Stock shall be deemed to have been converted on the
date of surrender of such certificate or certificates as provided above, and the
person or persons  entitled to receive  the shares of Series C  Preferred  Stock
issuable  upon such  conversion  shall be treated for all purposes as the record
holder or  holders of such  Series C  Preferred  Stock on such date.  As soon as
practicable on or after such conversion  date, the  Corporation  shall issue and
deliver  a  certificate  or  certificates  for the  number of shares of Series C
Preferred Stock issuable upon conversion.

                  5.       Conversion.

                  (a) Conversion Price. Shares of Series D Preferred Stock to be
converted  into shares of Common  Stock shall be so  converted  at a  conversion
price  (which  price shall be adjusted to the nearest  fourth  decimal  place as
hereinafter  provided  and, as so adjusted,  is  hereinafter  referred to as the
"Conversion Price") equal to: (i) from the date of initial issuance of shares of
Series D Preferred  Stock to but  excluding  the  30-month  anniversary  of such
issuance,  $52.50  per  share of  Common  Stock,  with  each  share of  Series D
Preferred  Stock being valued at $100.00 for such  purpose;  provided,  however,
that if a  Realization  Event  shall  occur  during  such  30-month  period  the
Conversion  Price shall equal to a fraction,  the  numerator of which is (A) the
consideration  per share of Common Stock (on a Fully Diluted basis)  received in
connection with such Realization Event, and the denominator of which is (B) 1.30
raised to a number equal to the number of years (or fraction  thereof)  from the
date of initial issuance of shares of Series D Preferred Stock until the date of
such Realization Event, but in no case shall be greater than $52.50 per share of
Common Stock nor less than $42.18 per share of Common  Stock;  and (ii) from and
after the thirty month  anniversary of the date of initial issuance of shares of
Series D Preferred  Stock (subject to paragraph (b) below),  $42.18 per share of
Common  Stock,  with each  share of Series D  Preferred  Stock  being  valued at
$100.00  for  such  purpose;  provided,  however,  that in no  event  shall  the
Conversion Price be less than the par value, if any, of the Common Stock.

                  (b) Automatic  Conversion  Upon a Qualified  Public  Offering.
Upon a Qualified Public  Offering,  each share of Series D Preferred Stock shall
automatically  convert,  without  any action on the part of the holder  thereof,
into shares of Common Stock at the Conversion Price in effect at such time, plus
the right to receive an amount of cash equal to the accumulated unpaid dividends
on such share of Series D  Preferred  Stock to and  including  such date (or the
right to receive  additional  shares of Common  Stock in lieu of cash  dividends
pursuant to Section 3(b)).

                  (c)  Conversion  at the Option of the Holder.  At any time and
from time to time prior to a Qualified Public Offering,  each holder of Series D
Preferred Stock shall have the right to convert such holder's shares of Series D
Preferred  Stock,  in whole or in  part,  into  shares  of  Common  Stock at the
Conversion  Price in effect at such time, plus the right to receive an amount of
cash  equal to the  accumulated  unpaid  dividends  on the  shares  of  Series D
Preferred  Stock so converted to and including the  Conversion  Date (as defined
below);  provided that, if such Conversion Date is prior to a Realization Event,
the  Corporation  may, in lieu of making a payment in cash equal to such amount,
deliver a number of shares of Common  Stock equal to such amount  divided by the
Fair Market Value of one share of Common  Stock.  In order to convert  shares of
Series D Preferred  Stock pursuant to this Section 5(c) the holder thereof shall

                                       5
<PAGE>

surrender  at the office of the  Corporation  the  certificate  or  certificates
therefor,  duly endorsed to the Corporation in blank, and give written notice to
the  Corporation  that such holder elects to convert such shares and shall state
in writing  therein  the name or names  (with  addresses)  in which such  holder
wishes the certificate or  certificates of Common Stock to be issued.  Shares of
Series D Preferred  Stock shall be deemed to have been  converted on the date of
surrender of such certificate or certificates as provided above (the "Conversion
Date"), and the person or persons entitled to receive the shares of Common Stock
issuable  upon such  conversion  shall be treated for all purposes as the record
holder or holders of such Common Stock on such date. As soon as  practicable  on
or after  the  Conversion  Date,  the  Corporation  shall  issue  and  deliver a
certificate  or  certificates  for the number of shares of Common Stock issuable
upon conversion.

                  (d)  Fractional  Shares,  Partial  Conversion.  No  fractional
shares  shall be issued upon  conversion  of shares of Series D Preferred  Stock
into  Common  Stock.  In case the number of shares of Series D  Preferred  Stock
represented by the  certificate  or  certificates  surrendered  pursuant to this
Section 5 exceeds the number of shares  converted,  the Corporation  shall, upon
such  conversion,  execute  and  deliver to the  holder,  at the  expense of the
Corporation,  a new  certificate  or  certificates  for the  number of shares of
Series  D  Preferred  Stock  represented  by  the  certificate  or  certificates
surrendered  which are not to be converted.  If any  fractional  share of Common
Stock would,  except for the  provisions  of the first  sentence of this Section
5(d), be delivered upon such conversion, the Corporation,  in lieu of delivering
such  fractional  share,  shall  pay to the  holder  surrendering  the  Series D
Preferred  Stock for  conversion  an amount in cash equal to the current  market
price of such  fractional  share as  determined  in good  faith by the  Board of
Directors.

                  (e)  Adjustment  of  Conversion  Price Upon Issuance of Common
Stock. Except as provided in Section 5(f), if and whenever the Corporation shall
hereafter issue or sell, or is, in accordance  with  subsection  5(e)(1) through
5(e)(6),  deemed to have  issued  or sold,  any  shares  of  Common  Stock for a
consideration  per share less than the  Conversion  Price in effect  immediately
prior to the time of such  issue or sale,  then,  forthwith  upon such  issue or
sale, the Conversion  Price shall be reduced to the price determined by dividing
(i) an amount  equal to the sum of (a) the  number  of  shares  of Common  Stock
outstanding  immediately  prior  to such  issue or sale  (determined  on a Fully
Diluted  basis)  multiplied  by the then existing  Conversion  Price and (b) the
consideration,  if any,  received by the Corporation upon such issue or sale, by
(ii) the total number of shares of Common Stock  outstanding  immediately  after
such issue or sale (deter-mined on a Fully Diluted basis).

                  For purposes of this Section 5(e),  the following  subsections
5(e)(1) to 5(e)(6) shall also be applicable:

                  5(e)(1)  Issuance  of Rights or  Options.  In case at any time
hereafter  the  Corporation  shall in any manner grant  (whether  directly or by
assumption in a merger or otherwise) any Options to purchase Common Stock or any
Convertible  Securities,  whether or not such Options or the right to convert or
exchange any such Convertible  Securities are immediately  exercisable,  and the
price per share for which  Common  Stock is issuable  upon the  exercise of such
Options  or upon the  conversion  or  exchange  of such  Convertible  Securities
(determined by dividing (i) the total amount,  if any, received or receivable by

                                       6
<PAGE>

the  Corporation  as  consideration  for the granting of such Options,  plus the
minimum aggregate amount of additional  consideration payable to the Corporation
upon the exercise of all such  Options,  plus, in the case of such Options which
relate to Convertible  Securities,  the minimum  aggregate  amount of additional
consideration,  if any,  payable  upon  the  issue  or sale of such  Convertible
Securities  and upon the  conversion  or  exchange  thereof,  by (ii) the  total
maximum  number of shares of Common  Stock  issuable  upon the  exercise of such
Options or upon the  conversion or exchange of all such  Convertible  Securities
issuable  upon the exercise of such Options)  shall be less than the  Conversion
Price in effect  immediately  prior to the time of the granting of such Options,
then the total  maximum  number of shares  of  Common  Stock  issuable  upon the
exercise of such  Options or upon  conversion  or exchange of the total  maximum
amount of such Convertible Securities issuable upon the exercise of such Options
shall be deemed to have been  issued  for such price per share as of the date of
granting of such  Options or the  issuance of such  Convertible  Securities  and
thereafter  shall be deemed to be outstanding.  Except as otherwise  provided in
subsection 5(e)(3), no adjustment of the Conversion Price shall be made upon the
actual  issue  of such  Common  Stock  or of such  Convertible  Securities  upon
exercise  of such  Options or upon the actual  issue of such  Common  Stock upon
conversion or exchange of such Convertible Securities.

                  5(e)(2)  Issuance  of  Convertible  Securities.  In  case  the
Corporation  shall  hereafter  in  any  manner  issue  (whether  directly  or by
assumption in a merger or otherwise) or sell any Convertible Securities, whether
or not the rights to  exchange or convert any such  Convertible  Securities  are
immediately  exercisable,  and the price per  share  for which  Common  Stock is
issuable upon such conversion or exchange  (determined by dividing (i) the total
amount received or receivable by the Corporation as consideration  for the issue
or sale of such  Convertible  Securities,  plus the minimum  aggregate amount of
additional consideration, if any, payable to the Corporation upon the conversion
or exchange thereof,  by (ii) the total maximum number of shares of Common Stock
issuable  upon the  conversion or exchange of all such  Convertible  Securities)
shall be less than the Conversion Price in effect  immediately prior to the time
of such issue or sale,  then the total maximum  number of shares of Common Stock
issuable upon conversion or exchange of all such Convertible Securities shall be
deemed to have been  issued for such price per share as of the date of the issue
or sale of such  Convertible  Securities  and  thereafter  shall be deemed to be
outstanding,  provided  that (a) except as  otherwise  provided in  subparagraph
5(e)(3),  no  adjustment of the  Conversion  Price shall be made upon the actual
issue of such Common  Stock upon  conversion  or  exchange  of such  Convertible
Securities and (b) if any such issue or sale of such  Convertible  Securities is
made upon  exercise of any Options to purchase any such  Convertible  Securities
for  which  adjustments  of the  Conversion  Price  have  been or are to be made
pursuant to other provisions of this Section 5(e), no further  adjustment of the
Conversion Price shall be made by reason of such issue or sale.

                  5(e)(3)  Change in Option Price or Conversion  Rate.  Upon the
happening of any of the following events, namely, if the purchase price provided
for  in  any  Option   referred  to  in  subsection   5(e)(1),   the  additional
consideration,   if  any,  payable  upon  the  conversion  or  exchange  of  any
Convertible  Securities referred to in subsection 5(e)(1) or 5(e)(2) or the rate
at which Convertible Securities referred to in subsection 5(e)(1) or 5(e)(2) are
convertible  into or  exchangeable  for Common  Stock  shall  change at any time
(including,  but not  limited  to,  changes  under or by  reason  of  provisions
designed to protect  against  dilution),  the Conversion  Price in effect at the
time of such event shall  forthwith be readjusted to the Conversion  Price which

                                       7
<PAGE>

would  have  been in  effect  at such  time  had  such  Options  or  Convertible
Securities  still   outstanding   provided  for  such  changed  purchase  price,
additional  consideration  or  conversion  rate, as the case may be, at the time
initially  granted,  issued or sold, but only if as a result of such  adjustment
the Conversion  Price then in effect  hereunder is thereby  reduced;  and on the
termination  of any such  Option or any such right to convert or  exchange  such
Convertible  Securities,  the Conversion  Price then in effect  hereunder  shall
forthwith be increased to the  Conversion  Price which would have been in effect
at the time of such  termination had such Option or Convertible  Securities,  to
the extent outstanding immediately prior to such termination, never been issued.

                  5(e)(4)  Consideration for Stock. In case any shares of Common
Stock,  Options or Convertible  Securities shall be issued or sold for cash, the
consideration received therefor shall be deemed to be the amount received by the
Corporation  therefor,  without deduction  therefrom of any expenses incurred or
any  underwriting  commissions or concessions paid or allowed by the Corporation
in  connection  therewith.  In case any  shares  of  Common  Stock,  Options  or
Convertible  Securities  shall be issued or sold for a consideration  other than
cash,  the  amount  of  the  consideration  other  than  cash  received  by  the
Corporation  shall be  deemed  to be the fair  value  of such  consideration  as
determined  in good faith by the Board of  Directors,  without  deduction of any
expenses incurred or any underwriting commissions or concessions paid or allowed
by the Corporation in connection therewith.  In case any Options shall be issued
in connection  with the issue and sale of other  securities of the  Corporation,
together comprising one integral transaction in which no specific  consideration
is  allocated  to such Options by the parties  thereto,  such  Options  shall be
deemed to have been issued for such consideration as determined in good faith by
the Board of Directors of the Corporation.

                  5(e)(5)  Record  Date.  In case the  Corporation  shall take a
record of the holders of its Common Stock for the purpose of entitling  them (i)
to receive a dividend or other distribution  payable in Common Stock, Options or
Convertible  Securities  or (ii) to  subscribe  for or  purchase  Common  Stock,
options or Convertible  Securities,  then such record date shall be deemed to be
the date of the issue or sale of the shares of Common  Stock deemed to have been
issued or sold upon the declaration of such dividend or the making of such other
distribution  or the  date of the  granting  of such  right of  subscription  or
purchase, as the case may be.

                  5(e)(6) Treasury Shares.  The number of shares of Common Stock
outstanding  at any given time shall not include  shares owned or held by or for
the account of the Corporation,  and the disposition of any such shares shall be
considered  an issue or sale of Common  Stock for the  purpose  of this  Section
5(e).

                  (f) Exceptions to Conversion Price Adjustment. Notwithstanding
the foregoing,  no adjustment to the Conversion  Price shall be made pursuant to
this Section 5 in connection  with the grant,  issuance or sale of Common Stock,
Convertible  Securities,  warrants,  options or other fights to subscribe for or
purchase Common Stock or Convertible Securities:  (i) pursuant to employee stock
purchase  or  stock  option  ownership  plans  adopted  by the  Corporation  for
employees,  consultants  and/or directors of the Corporation and its affiliates;
(ii) pursuant to the terms of any Convertible Securities,  warrants,  options or
other rights to subscribe  for or purchase  granted,  issued or sold pursuant to
clause (ii) above; (iii) pursuant to the High Yield Debt and Equity Offering (as

                                       8
<PAGE>

defined in a Subordinated Loan and Security Agreement, dated as of September 22,
1997,  among  KMC  Telecom  Inc.  ("KMC")  and KMC  Telecom  II,  Inc.  and AT&T
Commercial  Finance  Corporation,  as in effect on the Series C Preferred  Stock
Issue Date) or a subsequent debt offering  occurring prior to December 31, 1998;
(iv) pursuant to the terms of any Convertible Securities,  warrants,  options or
other rights to subscribe  for or purchase  granted,  issued or sold pursuant to
clauses (iii) above;  or (v) pursuant to Section 10C of the Amended and Restated
Note  Purchase  and  Investment  Agreement,  dated as of October  22,  1996,  as
amended,  by and  among the  Corporation,  Nassau  Capital  Partners  L.P.,  NAS
Partners I L.L.C.  and Harold N. Kamine;  provided that the aggregate  number of
shares of Common Stock issued or issuable pursuant to clauses (i) and (ii) above
shall not exceed 15% of the Common Stock (on a Fully Diluted basis)  outstanding
from time to time and the  aggregate  number of shares of Common Stock issued or
issuable  pursuant  to clause  (iii) and (iv) above  shall not exceed 11% of the
Common  Stock (on a Fully  Diluted  basis)  outstanding  from time to time;  and
further  provided that for the purposes of this Section 5(f): (a) 221,500 shares
of Common  Stock  initially  allocated  under the 1997 Stock Option Plan will be
deemed  outstanding  regardless  of the number of shares  actually  granted  and
exercisable  thereunder  and (b) shares of Common Stock issued or issuable  upon
exercise of options not among the 221,500 shares initially allocated pursuant to
the 1997 Stock Option Plan and which, when issued, were subject to clause (i) or
(ii) above,  will not be deemed  outstanding,  regardless of whether or not they
have been granted or are exercisable.

                  (g)  Subdivision or  Combination of Common Stock.  In case the
Corporation  shall at any time subdivide (by any stock split,  stock dividend or
otherwise)  its  outstanding  shares of Common  Stock  into a greater  number of
shares,  the Conversion  Price in effect  immediately  prior to such subdivision
shall be  proportionately  reduced,  and,  conversely,  in case the  outstanding
shares of Common Stock shall be combined  into a smaller  number of shares,  the
Conversion  Price  in  effect  immediately  prior to such  combination  shall be
proportionately increased.

                  (h)  Reorganization  or   Reclassification.   If  any  capital
reorganization or reclassification of the capital stock of the Corporation shall
be  effected  in such a way that  holders of Common  Stock  shall be entitled to
receive  stock,  securities  or assets with respect to or in exchange for Common
Stock,  then, as a condition of such  reorganization  or  reclassification  (but
subject to Section 7), lawful and adequate provisions shall be made whereby each
holder of a share or shares of Series D Preferred Stock shall thereupon have the
right to  receive,  upon the basis and upon the terms and  conditions  specified
herein  and in  lieu of the  shares  of  Common  Stock  immediately  theretofore
receivable  upon the  conversion  of such share or shares of Series D  Preferred
Stock,  such shares of stock,  securities  or assets as may be issued or payable
with respect to or in exchange for a number of outstanding shares of such Common
Stock equal to the number of shares of such Common Stock immediately theretofore
receivable upon such conversion had such reorganization or reclassification  not
taken  place,  and in any such case  appropriate  provisions  shall be made with
respect  to the  rights  and  interests  of  such  holder  to the end  that  the
provisions hereof (including, without limitation,  provisions for adjustments of
the Conversion  Price) shall  thereafter be applicable,  as nearly as may be, in
relation to any shares of stock,  securities  or assets  thereafter  deliverable
upon the exercise of such conversion rights.

                                       9
<PAGE>

                  (i) Carryover.  Notwithstanding  any other  provisions of this
Section 5, the  Corporation  shall not be required to make any adjustment to the
Conversion Price unless such adjustment would require an increase or decrease of
at least one percent (1%) in the Conversion  Price. Any lesser  adjustment shall
be carried  forward  and shall be made no later  than the time of, and  together
with,  the next  subsequent  adjustment  which,  together with any adjustment or
adjustments  so carried  forward,  shall amount to an increase or decrease of at
least one percent (1%) in the Conversion Price.

                  (j) Other Events.  If the Corporation  shall make any dividend
(excluding  cash dividends  payable out of accumulated  earnings and profits) or
distribution on the Common Stock or issue any Common Stock,  other capital stock
or other  security of the  Corporation  or any rights or warrants to purchase or
acquire any such security, which transaction does not result in an adjustment to
the Conversion Price pursuant to the foregoing provisions of this Section 5, the
Board of Directors may consider  whether such action is of such a nature that an
adjustment to the Conversion  Price should  equitably be made in respect of such
transaction.  If the Board of Directors of the  Corporation  determines  that an
adjustment to the Conversion  Price should be made, an adjustment  shall be made
effective  as of such  date,  as  determined  by the Board of  Directors  of the
Corporation.  The  determination of the Board of Directors of the Corporation as
to whether such an adjustment to the  Conversion  Price should be made,  and, if
so, as to what adjustment should be made and when, shall be final and binding on
the Corporation and all stockholders of the Corporation.  The Corporation  shall
be entitled to make such  additional  adjustments  in the Conversion  Price,  in
addition to those  required by the  foregoing  provisions  of this Section 5, as
shall be  necessary  in order that any  dividend  or  distribution  in shares of
capital stock of the Corporation,  subdivision,  reclassification or combination
of shares of stock of the Corporation or any recapitalization of the Corporation
shall not be taxable to the holders of the Common Stock.

                  (k)  Notice  of   Adjustment.   Upon  any  adjustment  of  the
Conversion  Price, then and in each such case the Corporation shall give written
notice  thereof,  by delivery in person,  certified or registered  mail,  return
receipt requested,  or facsimile  addressed to each holder of shares of Series D
Preferred  Stock  affected by such  adjustment  at the address of such holder as
shown on the books of the  Corporation,  which notice shall state the Conversion
Price  resulting from such  adjustment,  setting forth in reasonable  detail the
method upon which such calculation is based.

                  6.       Voting Rights.

                  (a) The  holders  of  Series  D  Preferred  Stock,  except  as
otherwise  required  under Delaware law or as set forth below in this Section 6,
shall not be entitled or permitted  to vote on any matter  required or permitted
to be voted upon by the stockholders of the Corporation.

                                       10
<PAGE>

                  (b)  Subject to Section 7,  without  the prior  consent of the
holders  of  two-thirds  of the  shares of the  Series D  Preferred  Stock  then
outstanding, voting as a separate class, the Corporation shall not:

                  (i) increase the number of shares of Series D Preferred  Stock
authorized for issuance;

                  (ii)  merge or  consolidate  with or into any  other  company,
person or  entity,  unless  holders of each  share of Series D  Preferred  Stock
receive  consideration  in an amount  equal to at least the  greater  of (A) the
product  of (x) the  number of shares of Common  Stock  into which such share of
Series D Preferred  Stock is then  convertible and (y) the  consideration  to be
received  by holders of each share of Common  Stock  pursuant  to such merger or
consolidation  and (B) the  Liquidation  Preference  of such  share of  Series D
Preferred Stock plus all accumulated but unpaid  dividends  thereon  (whether or
not declared);

                  (iii)  amend,  modify or repeal  the  powers,  preferences  or
rights of or the restrictions  provided for the benefit of holders of the Series
D Preferred  Stock or the Common  Stock if such action would affect the Series D
Preferred Stock or the Common Stock adversely;

                  (c)  Without  the consent of each holder of Series D Preferred
Stock  affected  thereby,  the  Corporation  shall not  reduce  the  Liquidation
Preference  of the  Series D  Preferred  Stock  or the  rate at which  dividends
accumulate thereon, or modify the dividend cumulation provisions of the Series D
Preferred  Stock or the times and prices at which the Series D  Preferred  Stock
may be  redeemed  in a manner  that would be adverse to the  holders of Series D
Preferred Stock.

                  7. Optional Redemption. (a) The outstanding shares of Series D
Preferred Stock shall be subject to redemption,  as hereinafter provided, at the
option of the  Corporation,  in whole  but not in part,  in  connection  with an
Acquisition  Event.  For  purposes  hereof,  "Acquisition  Event" shall mean any
merger or  consolidation  of the Corporation  with any other company,  person or
entity  (whether  or  not  the  Corporation  is the  entity  surviving  in  such
transaction)  as a result  of which  the  holders  of  shares  of  Common  Stock
(determined  on a fully  diluted  basis)  will hold less than a majority  of the
outstanding  shares of common  stock or other  equity  interests of the company,
person or entity resulting from such transaction (or any parent of such entity).

                  (b) For  each  share  of  Series D  Preferred  Stock  redeemed
pursuant to this Section 7, the Corporation shall be obligated on the date fixed
for such redemption  (the  "Redemption  Date"),  which date shall not be earlier
than the date of consummation of the applicable Acquisition Event, to pay to the
holder  thereof (upon  surrender by such holder at the  Corporation's  principal
office of the  certificate  representing  such share duly  endorsed  in blank or
accompanied  by an appropriate  form of  assignment) an amount (the  "Redemption
Price")  equal to the  greater of (A) the product of (x) the number of shares of
Common  Stock  into  which  such  share  of  Series  D  Preferred  Stock is then
convertible and (y) the consideration to be received by holders of each share of
Common  Stock  pursuant  to such  Acquisition  Event  and  (B)  the  Liquidation
Preference of such share of Series D Preferred  Stock plus all  accumulated  but
unpaid dividends thereon (whether or not declared).

                  (c) Notice of any  redemption of the Series D Preferred  Stock
pursuant to this Section 7  (specifying  the time and place of  redemption,  the
Redemption Price, the Conversion Price and the date on and after which shares of

                                       11
<PAGE>

Series D  Preferred  Stock  may no  longer  be  converted)  shall be  mailed  by
certified or registered mail, return receipt requested, to each holder of Series
D Preferred  Stock,  at the address of such  holder  shown on the  Corporation's
records, not less than 30 nor more than 45 days prior to the Redemption Date.

                  (d) If the Corporation  holds and sets aside money  sufficient
to pay the  Redemption  Price of the Series D Preferred  Stock on the Redemption
Date,  then on and  after  the  Redemption  Date:  (i) the  shares  of  Series D
Preferred Stock shall no longer be convertible into shares of Common Stock; (ii)
the  shares  of  Series D  Preferred  Stock  will  cease to be  outstanding  and
dividends  on the Series D Preferred  Stock will cease to be declared  and paid,
whether or not certificates  representing the Series D Preferred Stock have been
delivered  to the  Corporation;  and  (iii) all  other  rights of the  holder in
respect thereof shall terminate  (other than the right to receive the Redemption
Price upon delivery of such Series D Preferred Stock).

                  8. Reissuance of Series D Preferred Stock.  Shares of Series D
Preferred  Stock that have been issued and  reacquired in any manner,  including
shares  purchased or redeemed or exchanged or converted,  shall (upon compliance
with any  applicable  provisions  of the laws of  Delaware)  have the  status of
authorized and unissued shares of preferred stock  undesignated as to series and
may be redesignated and reissued as part of any series of preferred stock (other
than Series D Preferred Stock).

                  9.  Business  Day.  If any  payment  or  conversion  shall  be
required  by the terms  hereof to be made on a day that is not a  Business  Day,
such payment or conversion shall be made on the immediately  succeeding Business
Day.

                  10.  Definitions.  As used in this Certificate of Designation,
the following terms shall have the following meanings (with terms defined in the
singular  having  comparable  meanings  when used in the plural and vice versa),
unless the context otherwise requires:

                  "1997 Stock  Option  Plan" shall mean the 1997 Stock  Purchase
and Option Plan for Key Employees of KMC Telecom Holdings,  Inc. and Affiliates,
as the same may be amended from time to time.

                  "Board of Directors"  shall have the meaning ascribed to it in
the first paragraph of this Resolution.

                  "Business Day" means any day except a Saturday,  a Sunday,  or
other day on which  commercial  banks in the State of New York or New Jersey are
authorized or required by law or executive order to close.

                  "Capital Stock" means, with respect to any Person, any and all
shares,  interests,  participations,  rights in, or other  equivalents  (however
designated  and whether voting or  non-voting)  of, such Person's  capital stock
(but excluding any debt security that is  exchangeable  for or convertible  into
such capital stock).

                  "Common  Stock"  shall  have  the  meaning  ascribed  to it in
Section 2 hereof.

                                       12
<PAGE>

                  "Convertible   Securities"   shall  mean  any   evidences   of
indebtedness,  shares or securities  convertible into or exchangeable for Common
Stock.

                  "Corporation"  shall have the  meaning  ascribed  to it in the
first paragraph of this Resolution.

                  "Dividend  Payment Date" means March 31, June 30, September 30
and December 31 of each year.

                  "Dividend  Period"  means the  Initial  Dividend  Period  and,
thereafter, each Quarterly Dividend Period.

                  "Fair  Market  Value"  per  share  of  Common  Stock  as  of a
particular date (the  "Determination  Date") shall mean: (i) if the Common Stock
is listed or admitted for trading on a national  securities  exchange,  then the
Fair Market  Value shall be the average of the last 30 "daily  sales  prices" of
the Common  Stock on the  principal  national  securities  exchange on which the
Common  Stock is listed or admitted  for  trading on the last 30  Business  Days
prior  to the  Determination  Date,  or if not  listed  or  traded  on any  such
exchange,  then the Fair Market Value shall be the average of the last 30 "daily
sales prices" of the Common Stock on the Nasdaq  National  Market on the last 30
Business Days prior to the Determination  Date (the "daily sales price" shall be
the closing price for bona fide  transactions  of the Common Stock at the end of
each day);  or (ii) if the Common Stock is not so listed or admitted to unlisted
trading  privileges or if no such sale is made on at least 25 of such days, then
the Fair Market Value shall be as reasonably determined by an investment banking
firm of  recognized  national  standing  selected in good faith by the Company's
Board of  Directors  or a duly  appointed  committee  of the Board of  Directors
(which  determination  shall  be  reasonably  described  in the  written  notice
delivered to the holders of the Series D Preferred Stock).

                  "Fully  Diluted" shall mean at any date as of which the number
of  shares of  Common  Stock is to be  determined,  all  shares of Common  Stock
outstanding  at such date and the  maximum  number  of  shares  of Common  Stock
issuable in respect of Convertible  Securities  and warrants,  options and other
rights  to  purchase   (directly  or  indirectly)  shares  of  Common  Stock  or
Convertible  Securities (giving effect to the then current respective conversion
prices) outstanding on such date (to the extent the rights to convert,  exchange
or exercise thereunder are presently exercisable).

                  "High Yield Debt and Equity  Offering"  shall have the meaning
ascribed to it in Section 5 hereof.

                  "Initial Dividend Period" means the dividend period commencing
on, and  including,  the Series D Preferred  Stock Issue Date and ending on, and
excluding, the first Dividend Payment Date to occur thereafter.

                  "Junior  Stock"  shall  have  the  meaning  ascribed  to it in
Section 2 hereof.

                                       13
<PAGE>

                  "Liquidation Preference" shall have the meaning ascribed to it
in Section 1 hereof

                  "Option" shall mean rights,  options, or warrants to subscribe
for purchase or otherwise acquire Convertible Securities or Common Stock.

                  "Parity  Preferred  Stock" means,  collectively,  the Series A
Preferred Stock, the  Corporation's  Series B Cumulative  Convertible  Preferred
Stock,  par value $.01 per share,  the Series C  Preferred  Stock,  the Series D
Preferred  Stock and any other series of preferred  stock which is determined to
be "Parity Preferred Stock" by the Board of Directors.

                  "Person" means any individual, firm, corporation, partnership,
limited liability company,  trust,  incorporated or unincorporated  association,
joint  venture,  joint stock company,  governmental  body or other entity of any
kind.

                  "Qualified  Public  Offering" shall mean the offer for sale of
Common  Stock  pursuant  to an  effective  registration  statement  filed by the
Corporation  under  the  Securities  Act of  1933,  as  amended,  in any  single
transaction or series of related transactions, in which the Corporation receives
aggregate  gross  proceeds  (before  deduction  of  underwriting  discounts  and
expenses of sale) of at least  $40,000,000 in the  aggregate;  provided that the
per share price at which such shares are sold in the offering (before  deduction
of  underwriting  discounts  and  expenses  of sale) is at least  four times the
conversion  price of the Series A Preferred  Stock which would then be in effect
if determined pursuant to the terms of the Series A Preferred Stock in effect on
the initial  issuance date of the Series D Preferred  Stock  (whether or not any
shares of Series A Preferred Stock are then outstanding).

                  "Quarterly"  shall mean the quarterly  periods  commencing on,
and including,  each Dividend  Payment Date and ending on, and  excluding,  each
next Dividend Payment Date occurring immediately thereafter, respectively.

                  "Realization  Event" shall mean the occurrence of (i) the sale
of all or substantially  all of the Common Stock or assets of the Corporation or
the  consolidation  or  merger  of  the  Corporation  with  one  or  more  other
corporations,  in any single transaction or series of related  transactions,  or
(ii) the closing of one or more public  offerings  of Common  Stock in which the
Corporation  receives aggregate gross proceeds (before deduction of underwriting
discounts and expenses of sale) of at least $40,000,000.

                  "Senior  Preferred  Stock" means,  collectively,  the Series E
Preferred  Stock,  and the  Series F  Preferred  Stock and any  other  series of
preferred  stock  which is  determined  to be  "Senior  Preferred  Stock" by the
Directors,  provided  that, no Capital Stock shall be designated as such without
the consent of the majority of the Holders of Series D Preferred Stock.

                  "Series A Preferred  Stock" means the  Corporation's  Series A
Cumulative Convertible Preferred Stock, par value, $.0l per share.

                  "Series C Preferred  Stock" means the  Corporation's  Series C
Cumulative Convertible Preferred Stock, par value, $.0l per share.

                                       14
<PAGE>

                  "Series D Preferred  Stock" shall have the meaning ascribed to
it in Section 1 hereof.

                  "Series D Preferred  Stock Issue Date" means the first date on
which the Series D Preferred Stock is issued by the Corporation.


                  "Series  E  Preferred   Stock"   means  the  Series  E  Senior
Redeemable, Exchangeable, PIK Preferred Stock.

                   "Series  F  Preferred   Stock"  means  the  Series  F  Senior
Redeemable, Exchangeable, PIK Preferred Stock.

                  "Shareholders   Agreement"  means  the  Amended  and  Restated
Stockholders Agreement among KMC Telecom Holdings, Inc., Nassau Capital Partners
L.P., NAS Partners I L.L.C., Harold N. Kamine, KMC Telecommunications L.P., AT&T
Credit Corporation, General Electric Capital Corporation,  Corestates Bank, N.A.
and  Corestates  Holdings,  Inc.,  dated as of October 31,  1997,  as amended by
Amendment  No.1,  dated as of January  7,  1998,  to the  Amended  and  Restated
Stockholders Agreement,  dated as of October 31, 1997, Amendment No. 2, dated as
of January 26, 1998, to the Amended and Restated Stockholders  Agreement,  dated
as of October 31, 1997,  Amendment  No. 3, dated as of February 25, 1998, to the
Amended and  Restated  Stockholders  Agreement,  dated as of October  31,  1997,
Amendment  No. 4, dated as of  February 4, 1999,  to the  Amended  and  Restated
Stockholders Agreement,  dated as of October 31, 1997, Amendment No. 5, dated as
of April 30, 1999, to the Amended and Restated Stockholders Agreement,  dated as
of October 31, 1997.



                  IN WITNESS  WHEREOF,  KMC TELECOM  HOLDINGS,  INC., has caused
this  certificate to be duly executed by its Chief  Financial  Officer this 30th
day of April, 1999.

                                     KMC TELECOM HOLDINGS, INC.


                                     By:    /s/  James D. Grenfell
                                        --------------------------------
                                         Name:   James D. Grenfell
                                         Title:  Chief Financial Officer





                                       15

             CERTIFICATE OF VOTING POWERS, DESIGNATIONS, PREFERENCES
              AND RELATIVE PARTICIPATING, OPTIONAL OR OTHER SPECIAL
                     RIGHTS AND QUALIFICATIONS, LIMITATIONS
                         AND RESTRICTIONS THEREOF OF THE
          SERIES E SENIOR REDEEMABLE, EXCHANGEABLE, P1K PREFERRED STOCK
                          OF KMC TELECOM HOLDINGS, INC.


                         Pursuant to Section 151 of the
                General Corporation Law of the State of Delaware

                   As  contemplated  by  Sections  141  and  242 of the  General
Corporation Law of the State of Delaware (the "DGCL"),  the following resolution
was duly  adopted by the Board of  Directors  of KMC Telecom  Holdings,  Inc., a
Delaware  corporatin (the  "Corporation"),  by unanimous written consent,  dated
April 30, 1999:

                   WHEREAS,  pursuant to authority  conferred  upon the Board of
Directors by the Certificate of Incorporation,  as amended,  of said Corporation
(the "Certificate of Incorporation"), said Board of Directors, at a meeting duly
called and held on  February 1, 1999,  adopted a  resolution  providing  for the
issuance  of  175,000   authorized   shares  of  Series  E  Senior   Redeemable,
Exchangeable,  P1K  Preferred  Stock (the  "Series E  Preferred  Stock"),  which
resolution is as follows:

                  WHEREAS,  the Board of  Directors  is  authorized,  within the
limitations  and  restrictions  stated in the Certificate of  Incorporation,  as
amended,  to fix by resolution or resolutions  the designation of each series of
preferred  stock  and  the  powers,   designations,   preferences  and  relative
participating,  optional  or  other  rights,  if  any,  or  the  qualifications,
limitations or restrictions thereof, including,  without limiting the generality
of  the  foregoing,  such  provisions  as  may  be  desired  concerning  voting,
redemption,  dividends, dissolution or the distribution of assets, conversion or
exchange,  and such other  subjects or matters as may be fixed by  resolution or
resolutions  of the Board of  Directors  under the  General  Corporation  Law of
Delaware; and

                  WHEREAS, it is the desire of the Board of Directors,  pursuant
to its  authority as  aforesaid,  to authorize  and fix the terms of a series of
preferred stock and the number of shares constituting such series;

                  NOW,  THEREFORE,   BE  IT  RESOLVED,   that  there  is  hereby
authorized  such series of preferred  stock on the terms and with the provisions
herein set forth:

I.       CERTAIN DEFINITIONS.

                  As used herein,  the following  terms shall have the following
meanings  (with terms defined in the singular  having  comparable  meanings when
used in the plural and vice versa), unless the context otherwise requires:


<PAGE>

                  "Acquired   Indebtedness"   means  Indebtedness  of  a  Person
                  existing  at  the  time  such  Person   becomes  a  Restricted
                  Subsidiary or assumed in connection with an Asset  Acquisition
                  by the Corporation or a Restricted Subsidiary and not Incurred
                  in  connection  with,  or  in  anticipation  of,  such  Person
                  becoming a Restricted  Subsidiary  or such Asset  Acquisition;
                  PROVIDED that  Indebtedness  of such Person which is redeemed,
                  defeased,  retired  or  otherwise  repaid  at the  time  of or
                  immediately  upon  consummation  of the  transactions by which
                  such  Person   becomes  a   Restricted   Subsidiary   or  upon
                  consummation of such Asset  Acquisition  shall not be Acquired
                  Indebtedness.

                  "Adjusted  Consolidated Net Income" means, for any period, the
                  aggregate  net  income  (or loss) of the  Corporation  and its
                  Restricted   Subsidiaries   for  such  period   determined  in
                  conformity with GAAP;  PROVIDED that the following items shall
                  be  excluded in  computing  Adjusted  Consolidated  Net Income
                  (without  duplication):  (i) the net  income  (or loss) of any
                  Person  that  is  not  a  Restricted   Subsidiary  (or  is  an
                  Unrestricted  Subsidiary),  except to the extent of the amount
                  of  dividends  or  other  distributions  actually  paid to the
                  Corporation  or any of its  Restricted  Subsidiaries  by  such
                  Person or an Unrestricted  Subsidiary during such period; (ii)
                  solely  for  the  purposes  of   calculating   the  amount  of
                  Restricted  Payments  that  may be  made  pursuant  to  clause
                  (iii)(B) of the first  paragraph of Section XI(B) (and in such
                  case, except to the extent  includable  pursuant to clause (i)
                  above),  the net income (or loss) of any Person  accrued prior
                  to the date it becomes a  Restricted  Subsidiary  or is merged
                  into  or  consolidated  with  the  Corporation  or  any of its
                  Restricted  Subsidiaries  or all or  substantially  all of the
                  property  and  assets  of  such  Person  are  acquired  by the
                  Corporation or any of its Restricted  Subsidiaries;  (iii) the
                  net income of any Restricted Subsidiary to the extent that the
                  declaration  or payment of dividends or similar  distributions
                  by such Restricted Subsidiary of such net income is not at the
                  time permitted by the operation of the terms of its charter or
                  any agreement,  instrument,  judgment, decree, order, statute,
                  rule or governmental  regulation applicable to such Restricted
                  Subsidiary  (except to the extent  such  restriction  has been
                  legally  waived);  (iv) any gains or losses  (on an  after-tax
                  basis)  attributable  to Asset Sales  including  for  purposes
                  hereof the items  referred to in clauses  (b),  (c) and (e) of
                  the definition of

                  "Asset Sale" or the  termination of  discontinued  operations;
                  (v)  except  for  purposes  of   calculating   the  amount  of
                  Restricted  Payments  that  may be  made  pursuant  to  clause
                  (iii)(B) of the first  paragraph of Section XI(B),  any amount
                  paid or accrued as dividends on Preferred Stock (including the
                  Series E Preferred Stock) of the Corporation or any Restricted
                  Subsidiary owned by Persons other than the Corporation and any
                  of its Restricted  Subsidiaries;  (vi) all extraordinary gains
                  and  extraordinary  losses;  (vii) the cumulative  effect of a
                  change in accounting  principles  since the High Yield Closing
                  Date;   and  (viii)  at  the   irrevocable   election  of  the
                  Corporation  for each  occurrence,  any net  after-tax  income
                  (loss)  from  discontinued   operations;   PROVIDED  that  for
                  purposes of any subsequent Investment in the entity conducting
                  such discontinued  operations  pursuant to Section XI(B), such
                  entity shall be treated as an  Unrestricted  Subsidiary  until
                  such discontinued operations have actually been disposed of.


                                       2
<PAGE>

                  "Adjusted  Consolidated  Net Tangible  Assets" means the total
                  amount  of  assets  of  the  Corporation  and  its  Restricted
                  Subsidiaries (less applicable  depreciation,  amortization and
                  other valuation reserves), except to the extent resulting from
                  write-ups of capital assets (excluding write-ups in connection
                  with  accounting for  acquisitions  in conformity  with GAAP),
                  after deducting  therefrom (i) all current  liabilities of the
                  Corporation   and  its  Restricted   Subsidiaries   (excluding
                  intercompany  items)  and  (ii)  all  goodwill,  trade  names,
                  trademarks, patents, unamortized debt discount and expense and
                  other like  intangibles,  all as set forth on the most  recent
                  quarterly  or  annual   consolidated   balance  sheet  of  the
                  Corporation  and  its  Restricted  Subsidiaries,  prepared  in
                  conformity with GAAP.

                  "Affiliate"  means, as applied to any Person, any other Person
                  directly or indirectly  controlling,  controlled  by, or under
                  direct or indirect  common  control  with,  such  Person.  For
                  purposes  of  this  definition,   "control"  (including,  with
                  correlative meanings, the terms "controlling," "controlled by"
                  and "under common  control  with"),  as applied to any Person,
                  means the possession,  directly or indirectly, of the power to
                  direct or cause the direction of the  management  and policies
                  of such  Person,  whether  through  the  ownership  of  voting
                  securities, by contract or otherwise.

                  "Asset Acquisition" means (i) an investment by the Corporation
                  or any of its  Restricted  Subsidiaries  in any  other  Person
                  pursuant  to which  such  Person  shall  become  a  Restricted
                  Subsidiary  or shall be merged into or  consolidated  with the
                  Corporation or any of its Restricted  Subsidiaries  or (ii) an
                  acquisition  by the  Corporation  or  any  of  its  Restricted
                  Subsidiaries  of the  property  and assets of any Person other
                  than the  Corporation  or any of its  Restricted  Subsidiaries
                  that  constitute  substantially  all of a division  or line of
                  business of such Person.

                  "Asset  Sale" means any sale,  transfer  or other  disposition
                  (including by way of merger,  consolidation or  sale-leaseback
                  transaction)  in  one  transaction  or  a  series  of  related
                  transactions  by the  Corporation  or  any  of its  Restricted
                  Subsidiaries  to any Person other than the  Corporation or any
                  of  its  Restricted  Subsidiaries  of  (i)  all  or any of the
                  Capital  Stock  of  any  Restricted  Subsidiary,  (ii)  all or
                  substantially  all of the  property and assets of an operating
                  unit or business of the  Corporation  or any of its Restricted
                  Subsidiaries  or (iii) any other  property  and assets  (other
                  than the Capital Stock or other  Investment in an Unrestricted
                  Subsidiary)  of the  Corporation  or  any  of  its  Restricted
                  Subsidiaries  outside the  ordinary  course of business of the
                  Corporation or such  Restricted  Subsidiary and, in each case,
                  that is not governed by Section IX; PROVIDED that "Asset Sale"
                  shall  not  include  (a)  sales  or  other   dispositions   of
                  inventory,  receivables and other current assets, (b) sales or
                  other  dispositions of assets for consideration at least equal
                  to the fair market value of the assets sold or disposed of, to
                  the extent that the  consideration  received would  constitute


                                       3
<PAGE>

                  property or assets of the kind  described in clause  (i)(B) of
                  Section  XI(F),  (c) a disposition  of cash or Temporary  Cash
                  Investments,  (d) any Restricted  Payment that is permitted to
                  be made, and is made, in accordance  with Section  XI(B),  (e)
                  sales or other dispositions of assets with a fair market value
                  (as certified in an Officers' Certificate) not in excess of $2
                  million   (PROVIDED  that  any  series  of  related  sales  or
                  dispositions  in  excess  of $2  million  shall be  considered
                  "Asset  Sales"),  (t) the  lease,  assignment  of a  lease  or
                  sub-lease  of any real or personal  property  in the  ordinary
                  course of business, (g) foreclosures on assets, (h) pledges of
                  assets or stock by the  Corporation  or any of its  Restricted
                  Subsidiaries  otherwise  permitted  under this  Certificate of
                  Designations,  including  such pledges  securing  Indebtedness
                  under the Newcourt Facility or under the Lucent Facility,  (i)
                  the issuance of the Warrants to Newcourt Finance and Lucent by
                  the  Corporation  and  (j) the  exercise  of the  Warrants  by
                  Newcourt  Finance and Lucent and the  exercise of common stock
                  warrants by Newcourt  Finance in respect of KMC  Telecom,  (k)
                  the issuance of the Preferred Stock Warrants to First Union by
                  the  Corporation,  and (l) the exercise of the Preferred Stock
                  Warrants by First Union.

                  "Average  Life"  means,  at any  date  of  determination  with
                  respect  to  any  debt  security,  the  quotient  obtained  by
                  dividing  (i) the sum of the  products  of (a) the  number  of
                  years  from  such date of  determination  to the dates of each
                  successive  scheduled  principal payment of such debt security
                  and (b) the amount of such  principal  payment by (ii) the sum
                  of all such principal payments.

                  "Board  of  Directors"  means the  Board of  Directors  of the
                  Corporation.

                  "Board Resolution" means a copy of a resolution,  certified by
                  the  Secretary or Assistant  Secretary of the  Corporation  as
                  required by the context to have been duly adopted by the Board
                  of Directors and to be in full force and effect on the date of
                  such certification, and delivered to the Transfer Agent.

                  "Business  Day" means a day other than a  Saturday,  Sunday or
                  other  day on which  commercial  banks  in New  York  City are
                  authorized or required by law to close.

                  "Capital Stock" means, with respect to any Person, any and all
                  shares,   interests,   participations   or  other  equivalents
                  (however  designated,  whether voting or non-voting) in equity
                  of such  Person,  whether  outstanding  on the Closing Date or
                  issued thereafter,  including,  without limitation, all Common
                  Stock,  Preferred  Stock  (including  the  Series E  Preferred
                  Stock),  partnership  or  membership  interests  and any other
                  right to  receive a share of the  profits  and  losses  of, or
                  distributions of assets of, the issuing Person.

                  "Capitalized Lease" means, as applied to any Person, any lease
                  of any property (whether real, personal or mixed) of which the
                  discounted  present  value of the rental  obligations  of such
                  Person as lessee,  in conformity  with GAAP, is required to be
                  capitalized on the balance sheet of such Person.



                                       4
<PAGE>

                  "Capitalized  Lease  Obligations"  means  the  amount  of  the
                  liability in respect of a Capitalized Lease that would at such
                  time  be  required  to  be  capitalized  and  reflected  as  a
                  liability on a balance sheet prepared in accordance with GAAP.

                  "Change  of  Control"  means  such time as (i) a  "person"  or
                  "group"  (within the meaning of Sections 13(d) and 14(d)(2) of
                  the Exchange Act) becomes the ultimate  "beneficial owner" (as
                  defined in Rule 13d-3 under the Exchange Act) of more than 50%
                  of  the  total  voting  power  of  the  Voting  Stock  of  the
                  Corporation  on a  fully  diluted  basis  and  such  ownership
                  represents a greater  percentage  of the total voting power of
                  the Voting Stock of the Corporation, on a fully diluted basis,
                  than is held by the  Existing  Stockholders  on such date;  or
                  (ii)  individuals who on the Closing Date constitute the Board
                  of Directors  (together with any new directors  whose election
                  by the Board of Directors or whose  nomination by the Board of
                  Directors for election by the  Corporation's  stockholders was
                  approved  by a vote of at least a majority  of the  members of
                  the Board of Directors  then in office who either were members
                  of the  Board  of  Directors  on the  Closing  Date  or  whose
                  election  or   nomination   for  election  was  so  previously
                  approved) cease for any reason to constitute a majority of the
                  members of the Board of Directors then in office.

                  "Closing Date" means February 4, 1999.

                  "Commission" means the Securities and Exchange  Commission and
                  any successor agency having similar powers.

                  "Common  Stock"  means the  Common  Stock,  par value $.01 per
                  share,  of the Corporation and any other class of common stock
                  hereafter authorized by the Corporation from time to time.

                  "Consolidated   EBITDA"  means,   for  any  period,   Adjusted
                  Consolidated  Net Income for such period  plus,  to the extent
                  such  amount  was  deducted  in   calculating   such  Adjusted
                  Consolidated Net Income,  (i) Consolidated  Interest  Expense,
                  (ii) income taxes (other than income taxes (either positive or
                  negative)  attributable  to  extraordinary  and  non-recurring
                  gains  or  losses  or  sales of  assets),  (iii)  depreciation
                  expense,  (iv) amortization expense and (v) all other non-cash
                  items reducing  Adjusted  Consolidated  Net Income (other than
                  items that will require cash payments and for which an accrual
                  or reserve is, or is required by GAAP to be,  made),  less all
                  non-cash  items  increasing  (or,  in  the  case  of  a  loss,
                  decreasing) Adjusted Consolidated Net Income, determined, with
                  respect to clauses  (ii),  (iii) and (iv),  on a  consolidated
                  basis for the Corporation  and its Restricted  Subsidiaries in
                  conformity  with  GAAP;   PROVIDED  that,  if  any  Restricted
                  Subsidiary  is  not  a  Wholly  Owned  Restricted  Subsidiary,
                  Consolidated  EBITDA  shall  be  reduced  (to the  extent  not


                                       5
<PAGE>

                  otherwise  reduced in accordance with GAAP) by an amount equal
                  to (A) the  amount of the  Adjusted  Consolidated  Net  Income
                  attributable to such Restricted  Subsidiary  multiplied by (B)
                  the  percentage  ownership  interest  in the  income  of  such
                  Restricted Subsidiary not owned on the last day of such period
                  by the Corporation or any of its Restricted Subsidiaries.

                  "Consolidated  Interest  Expense" means,  for any period,  the
                  aggregate amount (without  duplication) of interest in respect
                  of Indebtedness (including,  without limitation,  amortization
                  of  original  issue  discount  on  any  Indebtedness  and  the
                  interest   portion  of  any   deferred   payment   obligation,
                  calculated in accordance with the effective interest method of
                  accounting;  all  commissions,  discounts  and other  fees and
                  charges  owed with  respect to letters of credit and  bankers'
                  acceptance  financing;  the net costs associated with Interest
                  Rate  Agreements;  and  Indebtedness  that  is  Guaranteed  or
                  secured  by  the   Corporation   or  any  of  its   Restricted
                  Subsidiaries) and the interest  component of Capitalized Lease
                  Obligations  paid,  accrued or  scheduled  to be paid or to be
                  accrued by the  Corporation  and its  Restricted  Subsidiaries
                  during such period; EXCLUDING, HOWEVER, (i) any amount of such
                  interest  of any  Restricted  Subsidiary  if the net income of
                  such  Restricted  Subsidiary is excluded in the calculation of
                  Adjusted  Consolidated  Net Income pursuant to clause (iii) of
                  the definition thereof (but only in the same proportion as the
                  net income of such Restricted  Subsidiary is excluded from the
                  calculation of Adjusted  Consolidated  Net Income  pursuant to
                  clause (iii) of the definition thereof) and (ii) any premiums,
                  fees and expenses (and any  amortization  thereof)  payable in
                  connection with the Lucent Facility, the Newcourt Facility and
                  the  offering  of the Series E Preferred  Stock,  the Series F
                  Preferred  Stock  and  the  Senior  Discount  Notes,   all  as
                  determined  on  a  consolidated  basis  (without  taking  into
                  account Unrestricted Subsidiaries) in conformity with GAAP.

                  "Consolidated  Leverage Ratio" means, on any Transaction Date,
                  the ratio of (i) the aggregate  amount of  Indebtedness of the
                  Corporation and its Restricted  Subsidiaries on a consolidated
                  basis  outstanding  on  such  Transaction  Date  to  (ii)  the
                  aggregate  amount  of  Consolidated  EBITDA  for the then most
                  recent four fiscal quarters for which financial  statements of
                  the Corporation have been provided to the Transfer Agent (such
                  four fiscal quarter  period being the "Four Quarter  Period");
                  PROVIDED that, in making the foregoing calculation,  PRO FORMA
                  effect shall be given to the following events which occur from
                  the  beginning  of  the  Four  Quarter   Period   through  the
                  Transaction Date (the "Reference Period"):  (i) the Incurrence
                  of the  Indebtedness  with respect to which the computation is
                  being  made and (if  applicable)  the  application  of the net
                  proceeds therefrom, including to refinance other Indebtedness,
                  as if such  Indebtedness was incurred,  and the application of
                  such proceeds  occurred,  at the beginning of the Four Quarter
                  Period;  (ii) the  Incurrence,  repayment or retirement of any
                  other  Indebtedness  by the  Corporation  and  its  Restricted
                  Subsidiaries since the first day of the Four Quarter Period as
                  if such  Indebtedness  was incurred,  repaid or retired at the


                                       6
<PAGE>

                  beginning  of the Four  Quarter  Period;  (iii) in the case of
                  Acquired  Indebtedness,  the related  acquisition,  as if such
                  acquisition  occurred  at the  beginning  of the Four  Quarter
                  Period; (iv) any acquisition or disposition by the Corporation
                  and its  Restricted  Subsidiaries  of any  corporation  or any
                  business or any assets out of the ordinary course of business,
                  whether by merger, stock purchase or sale or asset purchase or
                  sale or any related  repayment of  Indebtedness,  in each case
                  since the first day of the Four Quarter Period,  assuming such
                  acquisition or disposition  had been  consummated on the first
                  day of the Four  Quarter  Period  and after  giving  PRO FORMA
                  effect to net cost  savings  that the  Corporation  reasonably
                  believes  in good faith  could have been  achieved  during the
                  Four  Quarter  Period  as a  result  of  such  acquisition  or
                  disposition  (PROVIDED  that both (A) such cost  savings  were
                  identified   and   quantified  in  an  Officers'   Certificate
                  delivered   to  the   Transfer   Agent  at  the  time  of  the
                  consummation  of the  acquisition or disposition  and (B) with
                  respect to each acquisition or disposition  completed prior to
                  the 90th day  preceding  such date of  determination,  actions
                  were commenced or initiated by the Corporation  within 90 days
                  of such acquisition or disposition to effect such cost savings
                  identified in such Officers'  Certificate  and with respect to
                  any  other   acquisition   or   disposition,   such  Officers'
                  Certificate  sets forth the specific  steps to be taken within
                  the  90  days  after  such   acquisition   or  disposition  to
                  accomplish such cost savings);  and PROVIDED  FURTHER that (x)
                  in making such computation,  the Consolidated Interest Expense
                  attributable to interest on any Indebtedness computed on a PRO
                  FORMA basis and (A) bearing a floating  interest rate shall be
                  computed  as if the rate in effect on the date of  computation
                  had been the  applicable  rate for the  entire  period and (B)
                  which was not  outstanding  during  the  period  for which the
                  computation  is being made but which  bears,  at the option of
                  the Corporation, a fixed or floating rate of interest shall be
                  computed by applying, at the option of the Corporation, either
                  the  fixed  or   floating   rate,   and  (y)  in  making  such
                  computation,   the   Consolidated   Interest  Expense  of  the
                  Corporation attributable to interest on any Indebtedness under
                  a  revolving  credit  facility  computed  on a PRO FORMA basis
                  shall be  computed  based  upon the PRO  FORMA  average  daily
                  balance of such Indebtedness during the applicable period; and
                  (v) the  occurrence of any of the events  described in clauses
                  (i)-(iv)  above by any  Person  that has  become a  Restricted
                  Subsidiary or has been merged with or into the  Corporation or
                  any Restricted Subsidiary during such Reference Period.

                  "Consolidated  Net Worth" means, at any date of determination,
                  stockholders'  equity  as  set  forth  on  the  most  recently
                  available  quarterly or annual  consolidated  balance sheet of
                  the Corporation and its Restricted  Subsidiaries  (which shall
                  be as of a date  not  more  than 90 days  prior to the date of
                  such  computation,  and  which  shall  not take  into  account
                  Unrestricted  Subsidiaries),  less any amounts attributable to
                  Disqualified Stock or any equity security  convertible into or
                  exchangeable for Indebtedness,  the cost of treasury stock and
                  the principal  amount of any promissory  notes receivable from
                  the sale of the Capital Stock of the Corporation or any of its


                                       7
<PAGE>

                  Restricted  Subsidiaries,   each  item  to  be  determined  in
                  conformity   with  GAAP  (excluding  the  effects  of  foreign
                  currency  exchange   adjustments  under  Financial  Accounting
                  Standards  Board Statement of Financial  Accounting  Standards
                  No. 52).

                  "Corporation"  means KMC Telecom  Holdings,  Inc.,  a Delaware
                  corporation.

                  "Currency  Agreement"  means any  foreign  exchange  contract,
                  currency  swap   agreement  or  other  similar   agreement  or
                  arrangement.

                  "Disqualified  Stock"  means any  class or  series of  Capital
                  Stock of any  Person  that by its  terms or  otherwise  is (i)
                  required  to be  redeemed  prior to the  Mandatory  Redemption
                  Date,  (ii)  redeemable  at the  option of the  holder of such
                  class or  series  of  Capital  Stock at any time  prior to the
                  Mandatory   Redemption  Date  or  (iii)  convertible  into  or
                  exchangeable  for Capital  Stock  referred to in clause (i) or
                  (ii) above or Indebtedness  having a scheduled  maturity prior
                  to the Mandatory  Redemption  Date;  PROVIDED that any Capital
                  Stock that  would not  constitute  Disqualified  Stock but for
                  provisions thereof giving holders thereof the right to require
                  such Person to repurchase or redeem such Capital Stock (or the
                  security for which such Capital Stock is  convertible  into or
                  exchangeable  for) upon the  occurrence  of an "asset sale" or
                  "change  of  control"   occurring   prior  to  the   Mandatory
                  Redemption Date shall not constitute Disqualified Stock if the
                  "asset sale" or "change of control"  provisions  applicable to
                  such  Capital  Stock (or the  security  for which such Capital
                  Stock is  convertible  into or  exchangeable  for) are no more
                  favorable  to the  holders  of  such  Capital  Stock  (or  the
                  security for which such Capital Stock is  convertible  into or
                  exchangeable  for) than the  provisions  contained  in Section
                  XI(F) and Article  VIII below and such  Capital  Stock (or the
                  security for which such Capital Stock is  convertible  into or
                  exchangeable for) specifically  provides that such Person will
                  not  repurchase  or redeem  any such  stock  pursuant  to such
                  provision prior to the Corporation's repurchase of such Series
                  E Preferred  Stock as are required to be repurchased  pursuant
                  to Section XI(F) and Article VIII below.

                  "Dividend Payment Date" means any Redemption Date, January 15,
                  April 15,  July 15 and  October 15 and any other date on which
                  dividends  are payable or may be paid,  as  determined  by the
                  Board of Directors.

                  "Dividend  Record Date" means,  with respect to each  Dividend
                  Payment Date, the close of business on the date set forth next
                  to such Dividend Payment Date below:

                   DIVIDEND PAYMENT DATE              DIVIDEND RECORD DATE

                  January 15                              January 1
                  April 15                                April 1
                  July 15                                 July 1
                  October 15                              October 1


                                       8
<PAGE>

or such other record date as may be  designated  by the Board of Directors  with
respect to dividends  payable on such other  Dividend  Payment  Date;  PROVIDED,
HOWEVER,  that  such  record  date may not be more than 60 days or less than ten
days prior to such Dividend Payment Date. If any scheduled  Dividend Record Date
is not a Business Day, then such Dividend  Record Date shall be the Business Day
immediately preceding such scheduled Dividend Record Date.

                  "Exchange Act" shall mean the Securities Exchange Act of 1934,
                  as amended.

                  "Existing Stockholders" means Harold N. Kamine, his Affiliates
                  and Nassau.

                  "First  Union"  means First  Union  Investors,  Inc.,  a North
                  Carolina corporation.

                  "fair  market  value" means the price that would be paid in an
                  arm's-length  transaction  between  an  informed  and  willing
                  seller under no compulsion to sell and an informed and willing
                  buyer under no  compulsion to buy, as determined in good faith
                  by the  Board  of  Directors,  whose  determination  shall  be
                  conclusive if evidenced by a Board  Resolution;  PROVIDED that
                  for  purposes  of  clause  (vii) of the  second  paragraph  of
                  Section  XI(A),  (x) the fair  market  value  of any  security
                  registered  under the Exchange Act shall be the average of the
                  closing  prices,  regular  way,  of such  security  for the 20
                  consecutive  trading days  immediately  preceding  the sale of
                  Capital Stock and (y) in the event the  aggregate  fair market
                  value  of  any  other  property   (other  than  cash  or  cash
                  equivalents) received by the Corporation exceeds $100 million,
                  the fair market value of such property  shall be determined by
                  a  nationally   recognized   investment   banking  firm  or  a
                  nationally  recognized  firm having  expertise in the specific
                  area which is the subject of such  determination and set forth
                  in their  written  opinion  which  shall be  delivered  to the
                  Transfer Agent.

                  "GAAP" means generally accepted  accounting  principles in the
                  United  States of  America  as in effect as of the High  Yield
                  Closing Date, including,  without limitation,  those set forth
                  in  the  opinions  and   pronouncements   of  the   Accounting
                  Principles Board of the American Institute of Certified Public
                  Accountants and statements and pronouncements of the Financial
                  Accounting Standards Board or in such other statements by such
                  other  entity as  approved  by a  significant  segment  of the
                  accounting  profession.  All ratios and computations contained
                  or referred to in this  Certificate of  Designations  shall be
                  computed  in  conformity  with GAAP  applied  on a  consistent
                  basis,   except  that   calculations   made  for  purposes  of
                  determining  compliance  with the terms of the  covenants  and
                  with other  provisions  of this  Certificate  of  Designations
                  shall be made without giving effect to (i) the amortization of
                  any expenses  incurred in connection with the Lucent Facility,
                  the Newcourt  Facility,  the  offering of the Senior  Discount
                  Notes, the Series E Preferred Stock and the Series F Preferred
                  Stock and (ii) except as otherwise provided,  the amortization
                  of any amounts required or permitted by Accounting  Principles
                  Board Opinion Nos. 16 and 17.



                                       9
<PAGE>

                  "Guarantee" means any obligation,  contingent or otherwise, of
                  any   Person   directly   or   indirectly   guaranteeing   any
                  Indebtedness  of any other  Person and,  without  limiting the
                  generality  of  the  foregoing,  any  obligation,   direct  or
                  indirect,  contingent  or  otherwise,  of such  Person  (i) to
                  purchase or pay (or advance or supply  funds for the  purchase
                  or payment of such  Indebtedness of such other Person (whether
                  arising  by  virtue  of   partnership   arrangements,   or  by
                  agreements to keep-well, to purchase assets, goods, securities
                  or services  (unless such  purchase  arrangements  are on arm'
                  s-length terms and are entered into in the ordinary  course of
                  business), to take-or-pay,  or to maintain financial statement
                  conditions  or otherwise) or (ii) entered into for purposes of
                  assuring in any other manner the obligee of such  Indebtedness
                  of the payment thereof or to protect such obligee against loss
                  in respect  thereof (in whole or in part);  PROVIDED  that the
                  term   "Guarantee  "  shall  not  include   endorsements   for
                  collection or deposit in the ordinary course of business.  The
                  term "Guarantee" used as a verb has a corresponding meaning.

                  "High Yield Closing Date" means January 29, 1998.

                  "Holder"  means a  registered  holder  of  shares  of Series E
                  Preferred Stock.

                  "Incur"  means,  with respect to any  Indebtedness,  to incur,
                  create,  issue,  assume,  Guarantee or otherwise become liable
                  for or with respect to, or become responsible for, the payment
                  of, contingently or otherwise, such Indebtedness, including an
                  "Incurrence" of Acquired  Indebtedness;  PROVIDED that neither
                  the accrual of interest nor the  accretion  of original  issue
                  discount shall be considered an Incurrence of Indebtedness.

                  "Indebtedness"  means,  with respect to any Person at any date
                  of determination (without  duplication),  (i) all indebtedness
                  of such Person for borrowed  money,  (ii) all  obligations  of
                  such Person  evidenced  by bonds,  debentures,  notes or other
                  similar  instruments,  (iii) all obligations of such Person in
                  respect  of  letters  of credit or other  similar  instruments
                  (including reimbursement obligations with respect thereto, but
                  excluding  trade letters of credit),  (iv) all  obligations of
                  such Person to pay the deferred and unpaid  purchase  price of
                  property or services,  which  purchase  price is due more than
                  six months after the date of placing such  property in service
                  or taking delivery and title thereto or the completion of such
                  services,   except   Trade   Payables   and  accrued   current
                  liabilities  arising in the ordinary  course of business,  (v)
                  all  Capitalized  Lease  Obligations of such Person,  (vi) all
                  Indebtedness  referred to in clauses (i) through (v) hereof of
                  other  Persons  secured by a Lien on any asset of such Person,
                  whether or not such  Indebtedness  is assumed by such  Person;
                  PROVIDED  that the  amount of such  Indebtedness  shall be the
                  lesser of (A) the fair market value of such asset at such date
                  of  determination  and (B) the  amount  of such  Indebtedness,
                  (vii) all  Indebtedness  of other  Persons  Guaranteed by such
                  Person to the extent such  Indebtedness  is Guaranteed by such


                                       10
<PAGE>

                  Person and (viii) to the extent not otherwise included in this
                  definition, obligations under Currency Agreements and Interest
                  Rate  Agreements.  The amount of Indebtedness of any Person at
                  any date shall be the outstanding balance at such date (or, in
                  the case of a revolving credit or other similar facility,  the
                  total   amount   of   funds   outstanding   on  the   date  of
                  determination) of all  unconditional  obligations as described
                  above and, with respect to contingent obligations, the maximum
                  liability upon the occurrence of the  contingency  giving rise
                  to the obligation of the types described  above,  PROVIDED (A)
                  that the amount  outstanding  at any time of any  Indebtedness
                  issued with  original  issue  discount is the  original  issue
                  price of such  Indebtedness,  (B) that money  borrowed and set
                  aside at the time of the  Incurrence  of any  Indebtedness  in
                  order  to  prefund  the  payment  of  the   interest  on  such
                  Indebtedness  shall not be deemed to be "Indebtedness" and (C)
                  that Indebtedness shall not include any liability for federal,
                  state, local or other taxes.

                  "Interest Rate  Agreement"  means any interest rate protection
                  agreement,  interest  rate  future  agreement,  interest  rate
                  option agreement,  interest rate swap agreement, interest rate
                  cap agreement,  interest rate collar agreement,  interest rate
                  hedge  agreement,  option or future  contract or other similar
                  agreement or arrangement.

                  "Investment"   means,   with   respect  to  any  Person,   all
                  investments by such Person in other Persons in the form of any
                  direct or indirect advance,  loan or other extension of credit
                  (including, without limitation, by way of Guarantee or similar
                  arrangement;  but  excluding  advances  to  customers  in  the
                  ordinary course of business that are, in conformity with GAAP,
                  recorded as accounts  receivable  on the balance  sheet of the
                  Corporation or its Restricted  Subsidiaries  and  commissions,
                  travel and similar  advances to officers and employees made in
                  the ordinary  course of business) or capital  contribution  to
                  (by means of any transfer of cash or other  property to others
                  or any payment for property or services for the account or use
                  of others),  or any purchase or  acquisition of Capital Stock,
                  bonds,  notes,  debentures or other similar instruments issued
                  by, such other Person and shall include (i) the designation of
                  a Restricted Subsidiary as an Unrestricted Subsidiary and (ii)
                  the fair  market  value of the  Capital  Stock  (or any  other
                  Investment),  held by the Corporation or any of its Restricted
                  Subsidiaries,  of (or in) any  Person  that has ceased to be a
                  Restricted  Subsidiary,   including,  without  limitation,  by
                  reason of any transaction permitted by clause (iii) of Section
                  XI(D);  PROVIDED that the fair market value of the  Investment
                  remaining  in any Person  that has  ceased to be a  Restricted
                  Subsidiary   shall  not   exceed  the   aggregate   amount  of
                  Investments  previously made in such Person valued at the time
                  such  Investments  were  made less the net  reduction  of such
                  Investments.  For purposes of the definition of  "Unrestricted
                  Subsidiary" and Section XI(B), (i) "Investment"  shall include
                  the fair market value of the assets (net of liabilities (other
                  than  liabilities to the  Corporation or any of its Restricted
                  Subsidiaries))  of any Restricted  Subsidiary at the time that
                  such  Restricted  Subsidiary  is  designated  an  Unrestricted


                                       11
<PAGE>

                  Subsidiary,  (ii) the fair market  value of the assets (net of
                  liabilities  (other than liabilities to the Corporation or any
                  of  its   Restricted   Subsidiaries))   of  any   Unrestricted
                  Subsidiary  at the time that such  Unrestricted  Subsidiary is
                  designated  a  Restricted  Subsidiary  shall be  considered  a
                  reduction in  outstanding  Investments  and (iii) any property
                  transferred  to or from an  Unrestricted  Subsidiary  shall be
                  valued at its fair market value at the time of such transfer.

                  "Investment  Grade  Securities" means (i) securities issued or
                  directly and fully  guaranteed or insured by the United States
                  government or any agency or instrumentality thereof, (ii) debt
                  securities  or  debt  instruments  with a  rating  of BBB + or
                  higher by S&P or Baal or higher by Moody's  or the  equivalent
                  of such rating by such rating  organization,  or, if no rating
                  by S&P or Moody's then exists,  the  equivalent of such rating
                  by any other nationally  recognized  securities rating agency,
                  but excluding any debt securities or instruments  constituting
                  loans or advances among the Corporation and its  Subsidiaries,
                  and (iii)  investment in any fund that invests  exclusively in
                  investments  of the type  described  in  clauses  (i) and (ii)
                  which  fund may  also  hold  cash  pending  investment  and/or
                  distribution.

                  "Junior  Securities"  has the meaning  provided in Article III
                  hereof.

                  "KMC Telecom"  means KMC Telecom Inc, a Delaware  corporation.

                  "KMC  Telecom  II" means KMC  Telecom  II,  Inc.,  a  Delaware
                  corporation.

                  "KMC  Telecom  III" means KMC Telecom  III,  Inc.,  a Delaware
                  corporation.

                  "Lien"  means  any  mortgage,   pledge,   security   interest,
                  encumbrance,  lien or charge of any kind  (including,  without
                  limitation,  any  conditional  sale or other  title  retention
                  agreement or lease in the nature  thereof or any  agreement to
                  give any security interest).

                  "Lucent"   means   Lucent   Technologies   Inc.,   a  Delaware
                  corporation.

                  "Lucent Facility" means the vendor financing  facility between
                  Lucent,  KMC  Telecom  III and KMC  Telecom  Leasing  III LLC,
                  providing for  aggregate  borrowings of up to $600 million and
                  maturing  on the  eighth  anniversary  of the  closing of such
                  credit facility.

                  "Mandatory Redemption Date" means February 1, 2011.

                  "Moody's"  means  Moody's  Investors  Service,  Inc.  and  its
                  successors.

                  "Nassau"  means Nassau  Capital  Partners L.P., NAS Partners I
                  L.L.C. or their respective successors, and their Affiliates.



                                       12
<PAGE>

                  "Net Cash Proceeds"  means (a) with respect to any Asset Sale,
                  the  proceeds  of such  Asset Sale in the form of cash or cash
                  equivalents, including payments in respect of deferred payment
                  obligations (to the extent corresponding to the principal, but
                  not interest,  component  thereof when received in the form of
                  cash  or  cash   equivalents   (except  to  the  extent   such
                  obligations   are  financed  or  sold  with  recourse  to  the
                  Corporation  or any Restricted  Subsidiary)  and proceeds from
                  the  conversion of other  property  received when converted to
                  cash or cash equivalents, net of (i) brokerage commissions and
                  other  commissions,  fees  and  expenses  (including  fees and
                  expenses  of  counsel,  accountants  and  investment  bankers)
                  related  to  such  Asset  Sale  and  any  relocation  expenses
                  incurred as a result  thereof,  (ii)  provisions for all taxes
                  (whether  or not  such  taxes  will  actually  be  paid or are
                  payable) as a result of such Asset Sale without  regard to the
                  consolidated  results of operations of the Corporation and its
                  Restricted Subsidiaries, taken as a whole, (iii) payments made
                  to repay  Indebtedness or any other obligation  outstanding at
                  the time of such  Asset  Sale that  either (A) is secured by a
                  Lien on the  property  or assets sold or (B) is required to be
                  paid as a result of such sale and (iv) appropriate  amounts to
                  be provided by the Corporation or any Restricted Subsidiary as
                  a reserve against any  liabilities  associated with such Asset
                  Sale,  including,   without  limitation,   pension  and  other
                  post-employment  benefit  liabilities,  liabilities related to
                  environmental    matters    and    liabilities    under    any
                  indemnification  obligations  associated with such Asset Sale,
                  all as  determined  in  conformity  with  GAAP,  and (b)  with
                  respect to any issuance or sale of Capital Stock, the proceeds
                  of  such  issuance  or  sale  in the  form  of  cash  or  cash
                  equivalents, including payments in respect of deferred payment
                  obligations (to the extent corresponding to the principal, but
                  not interest,  component thereof) when received in the form of
                  cash  or  cash   equivalents   (except  to  the  extent   such
                  obligations   are  financed  or  sold  with  recourse  to  the
                  Corporation  or any Restricted  Subsidiary)  and proceeds from
                  the  conversion of other  property  received when converted to
                  cash or cash equivalents, net of attorney's fees, accountants'
                  fees,  underwriters' or placement  agents' fees,  discounts or
                  commissions and brokerage,  consultant and other fees incurred
                  in connection with such issuance or sale and net of taxes paid
                  or payable as a result thereof.

                  "Newcourt  Facility"  means  the Loan and  Security  Agreement
                  dated as of December 22, 1998 among KMC  Telecom,  KMC Telecom
                  II, and  Newcourt  Finance and any other  lenders or borrowers
                  from  time  to  time  party  thereto,   collateral  documents,
                  instruments,  and agreements executed in connection  therewith
                  and any amendments,  supplements,  modifications,  extensions,
                  renewals, restatements, refinancings or refundings thereof.

                  "Newcourt   Finance"   means   Newcourt   Commercial   Finance
                  Corporation,   formerly  known  as  AT&T  Commercial   Finance
                  Corporation, a Delaware corporation, and its successors.



                                       13
<PAGE>

                  "Offer  to  Purchase"  means  an offer  to  purchase  Series E
                  Preferred Stock by the Corporation from the Holders  commenced
                  by  mailing a notice  to the  Transfer  Agent and each  Holder
                  stating: (i) the covenant pursuant to which the offer is being
                  made and that all Series E Preferred  Stock  validly  tendered
                  will be accepted  for  payment on a PRO RATA  basis,  together
                  with any other Parity  Securities  subject to similar offer to
                  purchase  provisions;  (ii) the purchase price and the date of
                  purchase  (which  shall be a Business  Day no earlier  than 30
                  days nor  later  than 60 days  from the date  such  notice  is
                  mailed)  (the  "Payment  Date");   (iii)  that  any  Series  E
                  Preferred Stock not tendered will continue to accrue dividends
                  pursuant  to its  terms;  (iv) that,  unless  the  Corporation
                  defaults in the payment of the  purchase  price,  any Series E
                  Preferred Stock accepted for payment  pursuant to the Offer to
                  Purchase  shall  cease to  accrue  dividends  on and after the
                  Payment Date;  (v) that each Holder  electing to have Series E
                  Preferred  Stock  purchased  pursuant to the Offer to Purchase
                  will be required to  surrender  to the  Transfer  Agent at the
                  address specified in the notice prior to the close of business
                  on the Business  Day  immediately  preceding  the payment date
                  such holder's certificate representing such Series E Preferred
                  Stock,  together with the form entitled  "Option of the Holder
                  to  Elect  Purchase"  appearing  on the  reverse  side of such
                  Series E  Preferred  Stock  certificate  completed,  (vi) that
                  Holders  will be entitled to  withdraw  their  election if the
                  Paying Agent receives, not later than the close of business on
                  the third Business Day immediately preceding the Payment Date,
                  a telegram, facsimile transmission or letter setting forth the
                  name of such Holder,  the  liquidation  preference of Series E
                  Preferred  Stock  delivered for purchase and a statement  that
                  such Holder is withdrawing  its election to have such Series E
                  Preferred Stock purchased; and (vii) that Holders whose Series
                  E  Preferred  Stock is being  purchased  only in part  will be
                  issued  new  Series E  Preferred  Stock  equal in  liquidation
                  preference  to  the  unpurchased   portion  of  the  Series  E
                  Preferred  Stock   surrendered.   On  the  Payment  Date,  the
                  Corporation  shall (i) accept for  payment on a PRO RATA basis
                  Series E  Preferred  Stock,  together  with any  other  Parity
                  Securities subject to similar offer to purchase provisions, or
                  portions  thereof  tendered  pursuant to an Offer to Purchase;
                  (ii) deposit with the Paying Agent money sufficient to pay the
                  purchase price of all Series E Preferred Stock,  together with
                  any  other  Parity  Securities  subject  to  similar  offer to
                  purchase  provisions,  or portions  thereof so  accepted;  and
                  (iii) deliver, or cause to be delivered, to the Transfer Agent
                  all Series E Preferred  Stock or portions  thereof so accepted
                  together with an Officers'  Certificate  specifying  shares of
                  the Series E Preferred Stock or portions  thereof accepted for
                  payment by the  Corporation.  The Paying Agent shall  promptly
                  mail to the  Holders of Series E  Preferred  Stock so accepted
                  payment  in an amount  equal to the  purchase  price,  and the
                  Transfer  Agent shall promptly  authenticate  and mail to such
                  Holders  new  shares  of  Series E  Preferred  Stock  equal in
                  liquidation  preference  to  any  unpurchased  portion  of the
                  Series E Preferred Stock  surrendered.  The  Corporation  will
                  publicly  announce the results of an Offer to Purchase as soon
                  as  practicable  after the Payment  Date.  The Transfer  Agent
                  shall act as the Paying  Agent for an Offer to  Purchase.  The


                                       14
<PAGE>

                  Corporation will comply with Rule 14e-1 under the Exchange Act
                  and any other  securities laws and  regulations  thereunder to
                  the extent such laws and regulations  are  applicable,  in the
                  event that the Corporation is required to repurchase  Series E
                  Preferred Stock pursuant to an Offer to Purchase.

                  "Officer"  means  with  respect  to the  Corporation,  (i) the
                  Chairman of the Board,  the Vice  Chairman  of the Board,  the
                  President,  the Chief Executive  Officer,  the Chief Financial
                  Officer or a Vice  president,  and (ii) the  Treasurer  or any
                  Assistant  Treasurer,   or  the  Secretary  or  any  Assistant
                  Secretary of the Corporation.

                  "Officers  Certificate"  means  a  certificate  signed  by one
                  Officer listed in clause (i) of the definition thereof and one
                  Officer  listed  in  clause  (ii) of the  definition  thereof;
                  PROVIDED,  HOWEVER, that any such certificate may be signed by
                  any two of the Officers listed in clause (i) of the definition
                  thereof  in lieu of being  signed  by one  Officer  listed  in
                  clause (i) of the definition thereof and one Officer listed in
                  clause (ii) of the definition thereof.

                  "Parity  Securities" has the meaning  specified in Article III
                  hereof.

                  "Permitted   Investment"   means  (i)  an  Investment  in  the
                  Corporation or a Restricted Subsidiary or a Person which will,
                  upon  the  making  of such  Investment,  become  a  Restricted
                  Subsidiary  or be  merged  or  consolidated  with  or  into or
                  transfer or convey all or substantially all its assets to, the
                  Corporation  or a Restricted  Subsidiary;  PROVIDED  that such
                  person's   primary   business   is   related,   ancillary   or
                  complementary  to the  businesses of the  Corporation  and its
                  Restricted  Subsidiaries on the date of such Investment;  (ii)
                  Temporary Cash  Investments and Investment  Grade  Securities;
                  (iii)  payroll,  travel and similar  advances to cover matters
                  that are expected at the time of such  advances  ultimately to
                  be treated as expenses in accordance  with GAAP and reasonable
                  advances  to  sales   representatives;   (iv)  any  Investment
                  acquired  by  the   Corporation   or  any  of  its  Restricted
                  Subsidiaries  (x) in  exchange  for any  other  Investment  or
                  accounts  receivable  held  by the  Corporation  or  any  such
                  Restricted  Subsidiary in connection  with or as a result of a
                  bankruptcy, workout, reorganization or recapitalization of the
                  issuer of such other Investment or accounts  receivable or (y)
                  as a result of a foreclosure by the  Corporation or any of its
                  Restricted Subsidiaries with respect to any secured Investment
                  or  other  transfer  of  title  with  respect  to any  secured
                  Investment  in  default;   (v)  any  Investment   acquired  in
                  consideration  for the  issuance of Junior  Securities  or the
                  proceeds of the  issuance of Junior  Securities  to the extent
                  such amounts have not been previously  applied to a Restricted
                  Payment pursuant to clause  (iii)(B)(2) of the first paragraph
                  of Section  XI(B) or clause  (ii) of the second  paragraph  of
                  Section   XI(B)  or  used  to  support   the   Incurrence   of
                  Indebtedness  pursuant  to clause  (viii) in  accordance  with
                  Section   XI(A)  and   Investments   acquired   as  a  capital
                  contribution;  (vi)  Guarantees  permitted  by Section  XI(A);
                  (vii) loans or advances to employees of the Corporation or any
                  Restricted  Subsidiary that do not in the aggregate  exceed at


                                       15
<PAGE>

                  any  one  time  outstanding  $5.0  million;   (viii)  Currency
                  Agreements  and  Interest  Rate  Agreements   permitted  under
                  Section  XI(A);   (ix)   Investments   in  prepaid   expenses,
                  negotiable  instruments held for collection and lease, utility
                  and  workers'  compensation,  performance  and  other  similar
                  deposits;   (x)   Investments  in  debt  securities  or  other
                  evidences of Indebtedness that are issued by companies engaged
                  in the  Telecommunications  Business;  PROVIDED that when each
                  Investment  pursuant to this clause (x) is made, the aggregate
                  amount of Investments  outstanding  under this clause (x) does
                  not  exceed  $3.0  million;  (xi)  Strategic  Investments  and
                  Investments  in Permitted  Joint  Ventures in an amount not to
                  exceed  $20.0  million at any one time  outstanding;  (xii) an
                  Investment  in any Person  the  primary  business  of which is
                  related,  ancillary  or  complementary  to the business of the
                  Corporation   and  its   Subsidiaries  on  the  date  of  such
                  Investment  in an amount  not to exceed at any time in respect
                  of all  such  Investments  outstanding  the sum of (x)  $200.0
                  million plus (y) 40% of the Corporation's Consolidated EBITDA,
                  if  positive,   for  the  immediately  preceding  four  fiscal
                  quarters (valued in each case as provided in the definition of
                  "Investments");  (xiii) securities received in connection with
                  Asset Sales to the extent constituting non-cash  consideration
                  permitted  under Section  XI(F);  and (xiv)  Investments in an
                  amount not to exceed $50.0 million at any time outstanding.

                  "Permitted Joint Venture" means any Unrestricted Subsidiary or
                  any  other  Person in which the  Corporation  or a  Restricted
                  Subsidiary owns, directly or indirectly, an ownership interest
                  (other  than  a  Restricted   Subsidiary)  and  whose  primary
                  business  is  related,   ancillary  or  complementary  to  the
                  businesses of the Corporation and its Restricted  Subsidiaries
                  at the time of determination.

                  "Person"  means  any  individual,  partnership,   corporation,
                  business  trust,   joint  stock  company,   limited  liability
                  company,  trust,  unincorporated  association,  joint venture,
                  governmental authority or other entity of whatever nature.

                  "Preferred  Stock"  means  any  and  all  shares,   interests,
                  participations  or  other  equivalents  of  the  Corporation's
                  preferred stock, including any such security with any priority
                  over  Common   Stock  with   respect  to   dividends  or  upon
                  liquidation or similar events.

                  "Preferred  Stock  Warrants"  means any  warrants  that may be
                  issued under the Preferred Stock Warrant Agreement.

                  "Preferred   Stock  Warrant   Agreement"   means  the  Warrant
                  Agreement,  dated as of April 30, 1999, among the Corporation,
                  First Union and The Chase Manhattan Bank as warrant agent.



                                       16
<PAGE>

                  "Public Equity Offering" means an underwritten  primary public
                  offering  of Common  Stock of the  Corporation  pursuant to an
                  effective registration statement under the Securities Act.

                  "Purchase  Agreement" means the Securities  Purchase Agreement
                  dated as of February 4, 1999 among the  Corporation,  Newcourt
                  Finance and Lucent.

                  "Redemption  Date",  when used with  respect  to any  Series E
                  Preferred Stock to be redeemed,  means the date fixed for such
                  redemption by or pursuant to the terms of this  Certificate of
                  Designations.

                  "Redemption  Price" means, with respect to any share of Series
                  E Preferred  Stock,  the price at which such share of Series E
                  Preferred  Stock is to be  redeemed  pursuant  to the terms of
                  this Certificate of Designations.

                  "Regulated  Holder"  has the  meaning  provided in Article VII
                  (B)(i).

                  "Restricted   Subsidiary"   means   any   Subsidiary   of  the
                  Corporation other than an Unrestricted Subsidiary.

                  "Securities  Act" means the Securities Act of 1933, as amended
                  from time to time, or any successor statute.

                  "Senior  Discount Note Indenture" means the Indenture dated as
                  of January 29,  1998  between  the  Corporation  and The Chase
                  Manhattan Bank, relating to the Senior Discount Notes, as such
                  Indenture  may be amended,  supplemented,  extended,  renewed,
                  replaced or otherwise modified from time to time.

                  "Senior  Discount  Notes"  means the 12 1/2 % Senior  Discount
                  Notes due 2008  issued  by the  Corporation  under the  Senior
                  Discount Note Indenture.

                  "Senior  Securities"  has the meaning  provided in Article III
                  hereof.

                  "Shareholders   Agreement"  means  the  Amended  and  Restated
                  Stockholders  Agreement  among  KMC  Telecom  Holdings,  Inc.,
                  Nassau Capital Partners L.P., NAS Partners I L.L.C., Harold N.
                  Kamine, KMC Telecommunications  L.P., AT&T Credit Corporation,
                  General  Electric Capital  Corporation,  Corestates Bank, N.A.
                  and Corestates  Holdings,  Inc., dated as of October 31, 1997,
                  as amended by Amendment No.1,  dated as of January 7, 1998, to
                  the Amended and Restated Stockholders  Agreement,  dated as of
                  October  31,  1997,  Amendment  No. 2, dated as of January 26,
                  1998,  to the Amended  and  Restated  Stockholders  Agreement,
                  dated as of October  31,  1997,  Amendment  No. 3, dated as of
                  February  25, 1998,  to the Amended and Restated  Stockholders
                  Agreement,  dated as of October  31,  1997,  Amendment  No. 4,
                  dated as of  February 4, 1999,  to the  Amended  and  Restated
                  Stockholders   Agreement,   dated  as  of  October  31,  1997,


                                       17
<PAGE>

                  Amendment  No. 5, dated as of April 30,  1999,  to the Amended
                  and Restated Stockholders  Agreement,  dated as of October 31,
                  1997.

                  "Significant Subsidiary" means, any Subsidiary that would be a
                  "significant   subsidiary"   as   defined   in  17  CFR   Part
                  210.1-01(w),  promulgated  pursuant to the Securities  Act, as
                  such regulation is in effect on the date hereof.

                  "S&P" means Standard & Poor's Ratings Services,  a Division of
                  McGraw Hill, Inc., and its successors.

                  "Stated Maturity" means (i) with respect to any debt security,
                  the date  specified in such debt security as the fixed date on
                  which the final installment of principal of such debt security
                  is due and  payable  and (ii) with  respect  to any  scheduled
                  installment  of principal of or interest on any debt security,
                  the date  specified in such debt security as the fixed date on
                  which such installment is due and payable.

                  "Strategic  Investments"  means (a) Investments that the Board
                  of  Directors  has  determined  in good faith will  enable the
                  Corporation  or any of its Restricted  Subsidiaries  to obtain
                  additional  business  that it  might  not be  able  to  obtain
                  without making such Investment and (b) Investments in entities
                  the  principal  function of which is to perform  research  and
                  development  with respect to products and services that may be
                  used or useful in the  Telecommunications  Business;  PROVIDED
                  that the Corporation or one of its Restricted  Subsidiaries is
                  entitled or otherwise  reasonably expected to obtain rights to
                  such products or services as a result of such Investment.

                  "Strategic  Subordinated  Indebtedness"  means Indebtedness of
                  the  Corporation  Incurred  to finance  the  acquisition  of a
                  Person engaged in the Telecommunications  Business that by its
                  terms, or by the terms of any agreement or instrument pursuant
                  to which such  Indebtedness is  outstanding,  (i) is expressly
                  made  subordinate  in right of payment to the Senior  Discount
                  Notes and (ii) provides that no payment of principal,  premium
                  or interest  on, or any other  payment  with  respect to, such
                  Indebtedness  may be made prior to the  payment in full of all
                  of the Corporation's  obligations under the Series E Preferred
                  Stock  and the  Senior  Discount  Notes;  PROVIDED  that  such
                  Indebtedness  may  provide  for and be repaid at any time from
                  the  proceeds  of  the  sale  of  Capital  Stock  (other  than
                  Disqualified Stock) of the Corporation after the Incurrence of
                  such Indebtedness.

                  "Subsidiary"  means,  with  respect  to any  Person,  (i)  any
                  corporation, association, or other business entity (other than
                  a  partnership)  of which  more than 50% of the  total  voting
                  power of shares of Capital Stock entitled  (without  regard to
                  the occurrence of any  contingency) to vote in the election of
                  directors,  managers  or  trustees  thereof  is at the time of
                  determination owned or controlled,  directly or indirectly, by


                                       18
<PAGE>

                  such Person or one or more of the other  Subsidiaries  of such
                  Person  or a  combination  thereof  and (ii) any  partnership,
                  joint venture,  limited liability company or similar entity of
                  which (x) more than 50% of the capital accounts,  distribution
                  rights,  total  equity  and  voting  interests  or  general or
                  limited  partnership  interests,  as applicable,  are owned or
                  controlled,  directly or indirectly,  by such Person or one or
                  more of the other Subsidiaries of such Person or a combination
                  thereof whether in the form of membership, general, special or
                  limited  partnership  or otherwise  and (y) such Person or any
                  Wholly Owned Restricted Subsidiary of such Person is a general
                  partner or otherwise controls such entity.

                  "Telecommunications Business" means the development, ownership
                  or operation of one or more telephone,  telecommunications  or
                  information   systems   or   the   provision   of   telephony,
                  telecommunications or information services (including, without
                  limitation,  any voice, video  transmission,  data or Internet
                  services)   and  any  related,   ancillary  or   complementary
                  business.

                  "Temporary Cash  Investment"  means any of the following:  (i)
                  direct  obligations  of the  United  States of  America or any
                  agency  thereof  or  obligations  fully  and   unconditionally
                  guaranteed  by the  United  States of America or any agency or
                  instrumentality   thereof,   (ii)   time   deposit   accounts,
                  certificates  of deposit,  eurodollar  time deposits and money
                  market  deposits  maturing within 180 days or less of the date
                  of acquisition thereof issued by a bank or trust company which
                  is organized  under the laws of the United  States of America,
                  any state  thereof or any foreign  country  recognized  by the
                  United States of America,  and which bank or trust company has
                  capital,  surplus and undivided profits  aggregating in excess
                  of $50 million (or the foreign  currency  equivalent  thereof)
                  and has  outstanding  debt which is rated "A" (or such similar
                  equivalent  rating)  or  higher  by at  least  one  nationally
                  recognized statistical rating organization (as defined in Rule
                  436  under  the  Securities  Act)  or any  money  market  fund
                  sponsored  by  a  registered  broker  dealer  or  mutual  fund
                  distributor,  (iii) repurchase  obligations with a term of not
                  more  than 30 days  for  underlying  securities  of the  types
                  described  in clauses (i) and (ii) above  entered  into with a
                  bank  meeting  the  qualifications  described  in clause  (ii)
                  above, (iv) commercial  paper,  maturing not more than 90 days
                  after the date of acquisition,  issued by a corporation (other
                  than  an  Affiliate  of  the  Corporation)  organized  and  in
                  existence under the laws of the United States of America,  any
                  state thereof or any foreign country  recognized by the United
                  States  of  America  with a rating at the time as of which any
                  investment  therein is made of "P-i"(or  higher)  according to
                  Moody's or "A-i"(or  higher)  according to S&P, (v) securities
                  with  maturities  of six  months  or  less  from  the  date of
                  acquisition issued or fully and unconditionally  guaranteed by
                  any state,  commonwealth  or territory of the United States of
                  America,  or by any political  subdivision or taxing authority
                  thereof,  and rated at least "A" by S&P or  Moody's,  and (vi)
                  investment  funds  investing 95% of their assets in securities
                  of the type described in clauses (i)-(v) above.


                                       19
<PAGE>

                  "Trade  Payables"  means,  with  respect  to any  Person,  any
                  accounts  payable  or  any  other   indebtedness  or  monetary
                  obligation to trade creditors  created,  assumed or Guaranteed
                  by  such  Person  or any of its  Subsidiaries  arising  in the
                  ordinary course of business in connection with the acquisition
                  of goods or services.

                  "Transaction  Date" means,  with respect to the  Incurrence of
                  any  Indebtedness  by the Corporation or any of its Restricted
                  Subsidiaries,  the date such  Indebtedness  is to be  Incurred
                  and,  with respect to any  Restricted  Payment,  the date such
                  Restricted Payment is to be made.

                  "Transfer  Agent"  means Chase  Mellon  Shareholder  Services,
                  L.L.C.

                  "Unrestricted  Subsidiary"  means  (i) any  Subsidiary  of the
                  Corporation  that  at  the  time  of  determination  shall  be
                  designated  an   Unrestricted   Subsidiary  by  the  Board  of
                  Directors  in  the  manner  provided   below;   and  (ii)  any
                  Subsidiary  of  an  Unrestricted  Subsidiary.   The  Board  of
                  Directors may designate any Restricted  Subsidiary  (including
                  any  newly   acquired  or  newly  formed   Subsidiary  of  the
                  Corporation)  to be an  Unrestricted  Subsidiary  unless  such
                  Subsidiary  owns any  Capital  Stock  of, or owns or holds any
                  Lien on any property  of, the  Corporation  or any  Restricted
                  Subsidiary; PROVIDED that (A) any Guarantee by the Corporation
                  or  any  Restricted  Subsidiary  of  any  Indebtedness  of the
                  Subsidiary being so designated shall be deemed an "Incurrence"
                  of such Indebtedness and an "Investment" by the Corporation or
                  such  Restricted  Subsidiary  (or both, if  applicable) at the
                  time of such designation;  (B) either (I) the Subsidiary to be
                  so  designated  has total  assets of $1,000 or less or (II) if
                  such   Subsidiary  has  assets   greater  than  $1,000,   such
                  designation  would be  permitted  in  accordance  with Section
                  XI(B);  and (C) if applicable,  the Incurrence of Indebtedness
                  and the  Investment  referred to in clause (A) of this proviso
                  would be  permitted  in  accordance  with  Section  XI(A)  and
                  Section  XI(B).  The  Board of  Directors  may  designate  any
                  Unrestricted   Subsidiary  to  be  a  Restricted   Subsidiary;
                  PROVIDED that all Indebtedness of such Unrestricted Subsidiary
                  outstanding  immediately  after  such  designation  would,  if
                  Incurred at such time, have been permitted to be Incurred (and
                  shall be deemed to have been  Incurred)  for all  purposes  of
                  this Certificate of Designations.  Any such designation by the
                  Board of Directors shall be evidenced to the Transfer Agent by
                  promptly  filing with the  Transfer  Agent a copy of the Board
                  Resolution  giving effect to such designation and an Officers'
                  Certificate certifying that such designation complied with the
                  foregoing provisions.

                  "Voting  Stock"  means,  with  respect to any Person,  Capital
                  Stock of any class or kind ordinarily having the power to vote
                  for the  election  of  directors,  managers  or  other  voting
                  members of the governing body of such Person.



                                       20
<PAGE>

                  "Warrant  Agreement"  means the warrant  agreement,  dated the
                  Closing Date, among the Corporation,  Newcourt Finance, Lucent
                  and any  Additional  Purchaser (as described  therein) and The
                  Chase Manhattan Bank, as warrant agent.

                  "Warrants"  means any  warrants  that may be issued  under the
                  Warrant Agreement.

                  "Wholly  Owned" means,  with respect to any  Subsidiary of any
                  Person,  the  ownership  of 95 % or  more  of the  outstanding
                  Capital Stock of such  Subsidiary  (other than any  director's
                  qualifying shares or Investments by foreign nationals mandated
                  by applicable  law) by such Person or one or more Wholly Owned
                  Subsidiaries of such Person.

II.      DESIGNATION.

                  The series of Preferred  Stock  authorized  hereunder shall be
designated  as the  "Series E Senior  Redeemable,  Exchangeable,  P1K  Preferred
Stock" and is referred  to herein as the "Series E Preferred  Stock." The number
of shares constituting such series shall be 575,000. The par value of the Series
E  Preferred  Stock shall be $.01 per share of Series E  Preferred  Stock.  Each
share of Series E Preferred Stock  purchased from the  Corporation  shall have a
liquidation  preference of $1,000.  The Corporation may from time to time in its
discretion issue fractional shares of Series E Preferred Stock.

III.     RANKING.

                  The Series E Preferred  Stock shall,  with respect to dividend
distributions and distributions upon the liquidation, winding-up and dissolution
of the  Corporation,  rank (i) senior to (A) all classes of Common  Stock of the
Corporation,  (B) each other class of Capital Stock or series of Preferred Stock
the  terms of  which  expressly  provide  that it ranks  junior  to,  and do not
expressly  provide  that it ranks  senior  to or on a parity  with the  Series E
Preferred  Stock  as  to  dividend  distributions  and  distributions  upon  the
liquidation,   winding-up   and   dissolution  of  the   Corporation,   (C)  the
Corporation's  Series  A  Cumulative   Convertible  Preferred  Stock,  Series  C
Cumulative  Convertible  Preferred  Stock,  and Series D Cumulative  Convertible
Preferred  Stock (all  securities  described  in this  clause  (i)  collectively
referred  to as  "Junior  Securities");  (ii) on a parity  with (A) any class of
Capital Stock or series of Preferred Stock the terms of which expressly  provide
that such  class or series  will rank on a parity  with the  Series E  Preferred
Stock as to  dividend  distributions  and  distributions  upon the  liquidation,
winding-up  and   dissolution  of  the  Corporation  and  (B)  Series  F  Senior
Redeemable,  Exchangeable, PIK Preferred Stock (all securities described in this
clause (ii) collectively referred to as "Parity  Securities");  and (iii) junior
to each class of Capital  Stock or series of Preferred  Stock the terms of which
expressly  provide  that such class or series  will rank  senior to the Series E
Preferred Stock as to dividend distributions and distributions upon liquidation,
winding-up,  and  dissolution or the  Corporation.  The Series E Preferred Stock
will be  subject  to the  issuance  of series of Junior  Securities  and  Parity
Securities, PROVIDED that the Corporation may not authorize, create or issue, or
increase the authorized  amount of, any new class of Parity Securities or Senior
Securities (or any class of any security  convertible  into shares of any Parity


                                       21
<PAGE>

Security or Senior  Security)  without the approval of the Holders of at least a
majority of the shares of Series E Preferred Stock then  outstanding,  voting or
consenting,  as the case may be, separately as one class,  except that,  without
the approval of Holders of the Series E Preferred  Stock,  the  Corporation  may
issue shares of Senior Securities (or any class of any security convertible into
shares of any Senior  Security)  in exchange  for, or the  proceeds of which are
used to redeem or repurchase, (1) all (but not less than all) shares of Series E
Preferred  Stock and  Series F  Preferred  Stock  then  outstanding,  or (2) the
Indebtedness of the  Corporation.  The Series E Preferred Stock and the Series F
Preferred  Stock  (together  with any other Parity  Securities)  shall also with
respect to any redemption or repurchase by the Corporation of its Capital Stock,
rank  senior to the Junior  Securities,  except as  provided in Section 3 of the
Shareholders Agreement.


                                       22
<PAGE>

IV.      DIVIDENDS.

                  (A) Holders of Series E  Preferred  Stock shall be entitled to
receive,  when,  as and if  declared  by the  Board of  Directors,  out of funds
legally available therefor,  dividends on the Series E Preferred Stock at a rate
per  annum  equal to 14.5% of the  liquidation  preference  per  share,  payable
quarterly. All dividends will be cumulative,  whether or not earned or declared,
accruing on a daily basis,  whether or not there are  profits,  surplus or other
funds  legally  available  for the payment of such  dividends,  from the date of
issuance  of the  Series E  Preferred  Stock and will be  payable  quarterly  in
arrears on each  Dividend  Payment  Date,  commencing  on April 15, 1999. On and
before January 15, 2004, the  Corporation may pay dividends,  at its option,  in
cash or in additional fully paid and nonassessable  shares of Series E Preferred
Stock having an  aggregate  liquidation  preference  equal to the amount of such
dividends rounded to the nearest $1.00.  After January 15, 2004,  dividends must
be paid in cash, unless the Corporation's debt securities  prohibit such payment
or there are no funds legally available therefor, in which case dividends may be
paid in  additional  fully paid and  nonassessable  shares of Series E Preferred
Stock having an  aggregate  liquidation  preference  equal to the amount to such
dividends  rounded to the nearest  $1.00.  If any dividend (or portion  thereof)
payable on any  Dividend  Payment  Date is not  declared or paid in full on such
Dividend Payment Date, the amount of accrued and unpaid dividends will accrue at
the dividend rate on the Series E Preferred Stock, compounding quarterly,  until
declared and paid in full.

                  (B) No full  dividends  may be  declared  or paid or funds set
apart for the  payment  of  dividends  on any Parity  Securities  for any period
unless full cumulative dividends shall have been or  contemporaneously  shall be
declared and paid in full on the Series E Preferred Stock. If full dividends are
not so paid,  the Series E Preferred  Stock shall share  dividends pro rata with
the Parity Securities. No dividends may be paid or set apart for such payment on
Junior Securities (except dividends on Junior Securities in additional shares of
Junior  Securities)  and  no  Junior  Securities  or  Parity  Securities  may be
repurchased,  redeemed  or  otherwise  retired  nor may  funds be set  apart for
payment with respect  thereto if full  cumulative  dividends shall not have been
paid on the Series E Preferred Stock.

                  (C) Each dividend  paid on the Series E Preferred  Stock shall
be payable to Holders of record as their names shall  appear in the stock ledger
of the  Corporation on the Dividend  Record Date for such dividend,  except that
dividends in arrears for any past Dividend Payment Date may be declared and paid
at any time without  reference to such regular  Dividend Payment Date to Holders
of record on a later dividend record date determined by the Board of Directors.

V.       LIQUIDATION PREFERENCE.

                  (A) Upon any voluntary or involuntary liquidation, dissolution
or winding-up of the  Corporation,  holders of Series E Preferred  Stock will be
entitled  to be  paid,  out  of the  assets  of the  Corporation  available  for
distribution,  $1,000  per share,  plus an amount in cash  equal to accrued  and
unpaid  dividends  thereon to the date  fixed for  liquidation,  dissolution  or
winding-up (including an amount equal to a prorated dividend for the period from
the last Dividend Payment Date to the date fixed for liquidation, dissolution or
winding-up),  before any distribution is made on any Junior Securities. If, upon


                                       23
<PAGE>

any  voluntary or  involuntary  liquidation,  dissolution  or  winding-up of the
Corporation,  the amounts  payable with respect to the Series E Preferred  Stock
and all other Parity  Securities are not paid in full, the holders of the Series
E Preferred  Stock and the Parity  Securities  will share equally and ratably in
any  distribution  of  assets  of the  Corporation  in  proportion  to the  full
liquidation  preference  and  accrued  and  unpaid  dividends  to which  each is
entitled.  After payment of the full amount of the  liquidation  preferences and
accrued and unpaid dividends to which they are entitled, the holders of Series E
Preferred  Stock  will  not be  entitled  to any  further  participation  in any
distribution of assets of the Corporation.

                  (B) For the purposes of this Article V only, neither the sale,
lease,  conveyance,  exchange or transfer (for cash, shares of stock, securities
or other consideration) of all or substantially all of the property or assets of
the Corporation nor the  consolidation or merger of the Corporation with or into
one or more  corporations  shall be deemed to be a  liquidation,  dissolution or
winding-up of the Corporation.

VI.      REDEMPTION.

                  (A) MANDATORY  REDEMPTION.  The Series E Preferred Stock shall
be subject to mandatory  redemption  (subject to the legal availability of funds
therefor and any  contractual  or other  restrictions  with respect  thereto) in
whole on the Mandatory  Redemption Date at a Redemption Price,  payable in cash,
equal to the  liquidation  preference  thereof on the  Redemption  Date plus all
accrued and unpaid dividends thereon to the Redemption Date.

                  (B) OPTIONAL  REDEMPTION.  The Series E Preferred Stock may be
redeemed at any time on or after April 15, 2004, at the Corporation's option, in
whole or in part,  at the  Redemption  Prices  (expressed as a percentage of the
liquidation  preference thereof on the Redemption Date) set forth below, plus an
amount  in cash  equal  to all  accrued  and  unpaid  dividends  thereon  to the
Redemption Date, if redeemed during the period beginning April 15 of each of the
years set forth below:

                  YEAR                              PERCENTAGE

                  2004                               110.000%
                  2005                               106.667%
                  2006                               103.333%
                  2007 and thereafter                100.000%

                  In addition,  at any time or from time to time, on or prior to
April 15, 2002, the  Corporation  may, at its option,  redeem shares of Series E
Preferred  Stock with the  proceeds  of one or more  sales of the  Corporation's
Capital  Stock at a  Redemption  Price,  payable  in cash,  equal to 110% of the
liquidation  preference  thereof on the Redemption  Date, plus an amount in cash
equal to all  accrued  and  unpaid  dividends  thereon to the  Redemption  Date,
provided that as of the date of any such  redemption,  the cumulative  aggregate
liquidation  preference  of all  shares of  Series E  Preferred  Stock  redeemed
pursuant to this  provision on or prior to such date shall not exceed 35% of the
aggregate liquidation preference of shares of Series E Preferred Stock issued on
or prior to such date whether or not still outstanding on such date.



                                       24
<PAGE>

                  No optional  redemption may be authorized or made unless prior
thereto full unpaid cumulative dividends shall have been paid or a sum set apart
for such payment on the Series E Preferred Stock.

                  (C) PROCEDURE FOR REDEMPTION. (i) Not more than sixty (60) and
not less than thirty (30) days prior to the Redemption Date, written notice (the
"Redemption  Notice") shall be given by the  Corporation by first-class  mail to
each Holder at such Holder's  address as the same appears on the stock ledger of
the Corporation;  PROVIDED, HOWEVER, that no failure to give such notice nor any
deficiency therein shall affect the validity of the procedure for the redemption
of any  shares  of Series E  Preferred  Stock to be  redeemed,  except as to the
Holders to whom the  Corporation  has failed to give such notice or except as to
the Holders whose notice was defective. The Redemption Notice shall state:

                  (a)      the Redemption Price;

                  (b)      the Redemption Date;

                  (c) that the Holder is to surrender to the Corporation, at the
place  or  places  designated  in  such  Redemption   Notice,  its  certificates
representing the shares of Series E Preferred Stock to be redeemed; and

                  (d) the  name of any  bank or  trust  company  performing  the
duties referred to in Section VI(C)(iv) below.

                  (ii) On or before the Redemption Date, each Holder of Series E
Preferred  Stock to be redeemed shall  surrender the certificate or certificates
representing such shares of Series E Preferred Stock to the Corporation,  in the
manner  and  at  the  place  designated  in the  Redemption  Notice,  and on the
Redemption  Date the full  Redemption  Price for such shares shall be payable in
cash to the Holder whose name appears in the stock ledger of the  Corporation as
the  owner  thereof,  and each  surrendered  certificate  shall be  returned  to
authorized but unissued shares of Preferred Stock of the Corporation.

                  (iii) Unless the  Corporation  defaults in the payment in full
of the applicable  Redemption  Price,  dividends on the Series E Preferred Stock
called for  redemption  shall cease to accrue on the  Redemption  Date,  and the
Holders of such  shares  shall cease to have any  further  rights  with  respect
thereto on the Redemption  Date,  other than the right to receive the Redemption
Price.

                  (iv) If a  Redemption  Notice shall have been duly given or if
the  Corporation  shall  have  given to the bank or  trust  company  hereinafter
referred to irrevocable authorization promptly to give such notice, and if on or
before the  Redemption  Date  specified  therein  the funds  necessary  for such
redemption  shall  have  been  irrevocably  and  indefeasibly  deposited  by the


                                       25
<PAGE>

Corporation with such bank or trust company in trust for the PRO RATA benefit of
the  Holders of the  Series E  Preferred  Stock  called  for  redemption,  then,
notwithstanding  that any certificate for shares so called for redemption  shall
not have  been  surrendered  for  cancellation,  from and after the time of such
deposit,  all shares so called,  or to be so called pursuant to such irrevocable
authorization,  for redemption  shall be deemed no longer to be outstanding  and
all rights with  respect to such shares  shall  forthwith  cease and  terminate,
excepting  only the right of the  Holders  thereof to receive  from such bank or
trust company at any time after the time of such deposit the funds so deposited,
without  interest.  Any  interest  accrued  on such  funds  shall be paid to the
Corporation from time to time. Any funds so set aside or deposited,  as the case
may be, and unclaimed at the end of three years from such Redemption Date shall,
to the extent permitted by law, be released or repaid to the Corporation,  after
which  repayment the Holders of the shares to be redeemed shall look only to the
Corporation for payment thereof.

                  (v) In the event of partial  redemptions of Series E Preferred
Stock,  the shares to be  redeemed  will be  determined  PRO RATA or by lot,  as
determined  by the  Corporation,  except  that the  Corporation  may redeem such
shares  held by any holder of fewer than 100 shares  without  regard to such PRO
RATA redemption  requirement.  If any Series E Preferred Stock is to be redeemed
in part,  the  Redemption  Notice that relates to such Series E Preferred  Stock
shall state the portion of the liquidation preference to be redeemed. New shares
of Series E Preferred Stock having an aggregate liquidation  preference equal to
the  unredeemed  portion shall be issued in the name of the Holder  thereof upon
cancellation of the original Series E Preferred Stock.

                  (vi)  Notwithstanding  anything  herein  to  the  contrary,  a
Redemption  Notice will be revocable  if (i) it states that it is revocable  and
provides that a notice of revocation  may be given not less than five days prior
to the Redemption Date by the Corporation in accordance with Article XVII hereof
and (ii) the Board of Directors determines that the availability of funds to pay
the  Redemption  Price is subject to the closing of a financing and, at the time
such Redemption Notice is given, such closing is subject to uncertainty.

VII.     VOTING RIGHTS.

                  (A) The  Holders  of Series E  Preferred  Stock  shall have no
voting rights except as set forth below and as otherwise provided by law.

                  (B)(i) If and whenever (1) dividends on the Series E Preferred
Stock are in arrears and remain  unpaid with respect to four  quarterly  periods
(whether  or not  consecutive),  (2) the  Corporation  fails  to  discharge  any
redemption obligation with respect to the Series E Preferred Stock, (3) a breach
or violation by the  Corporation of the  provisions of Article X occurs,  or the
Corporation  fails to exchange  Exchange  Debentures  for the Series E Preferred
Stock tendered for exchange on the exchange date, whether or not the Corporation
satisfies the conditions to permit such exchange,  (4) the Corporation  fails to
make a Change of Control Offer or cash payment with respect  thereto if required
by the  provisions of Article VIII or (5) a breach or violation of any provision
of Article IX or  Article  XI occurs  and is not  remedied  within 30 days after
notice thereof to the  Corporation by Holders of 25 % or more of the liquidation
preference  of the Series E Preferred  Stock then  outstanding  (each such event
referred to as a "Voting Rights Triggering Event"), then the number of directors


                                       26
<PAGE>

then  constituting the Board of Directors of the Corporation  shall be increased
by one director and the Holders of a majority of the then outstanding  shares of
Series E Preferred Stock,  voting as a single class,  shall be entitled to elect
one additional director at any annual meeting of shareholders or special meeting
held in place  thereof,  or at a  special  meeting  of the  Holders  of Series E
Preferred Stock called as hereinafter  provided. In the event that any Holder is
a "bank  holding  company"  or a direct or indirect  subsidiary  thereof for the
purposes of the Bank Holding Company Act of 1956, as amended and the regulations
promulgated  thereunder  (collectively,  the "BHC Act"), neither such Holder nor
any  subsequent  holder of the Series E  Preferred  Stock  (each,  a  "Regulated
Holder")  shall be entitled to exercise any voting rights  hereunder,  unless in
the  reasonable  judgment of such  Regulated  Holder,  as evidenced by a written
notice to the  Corporation  from such  Regulated  Holder and if requested by the
Corporation  an  opinion  of  counsel  to  such  Regulated   Holder   reasonably
satisfactory  to the  Corporation,  such exercise would not violate the BHC Act.
Upon notice of any Voting Rights Triggering Event under this Article VII (B)(i),
such Regulated  Holder shall promptly advise the Corporation in writing and each
other  Regulated  Holder of whether it is entitled to exercise its voting rights
hereunder.

                  (ii)  Whenever a Voting  Rights  Triggering  Event  shall have
occurred,  voting  rights  of the  Holders  of Series E  Preferred  Stock may be
exercised  initially  either at a special  meeting  of the  Holders  of Series E
Preferred  Stock called as  hereinafter  provided,  or at any annual  meeting of
shareholders held for the purpose of electing directors,  and thereafter at each
such  annual  meeting  or by the  written  consent  of the  Holders  of Series E
Preferred  Stock,  voting as a single  class,  pursuant to the Delaware  General
Corporation Law. The term of office of any such elected director shall expire at
the next  annual  meeting  of  shareholders  held for the  purpose  of  electing
directors,  subject to a new  election  of a director by the Holders of Series E
Preferred  Stock,  voting as a single class, at each successive  annual meeting,
but such voting rights and the term of office of any such elected director shall
expire at such time as (A) all  dividends  accrued on Series E  Preferred  Stock
shall have been paid in full and (B) each failure, breach or default referred to
in paragraph VII(B) (i)(A)(2), (3), (4) and (5) above is remedied.

                  (iii) At any time after a Voting Rights Triggering Event shall
have  occurred  and such voting  rights  shall not already  have been  initially
exercised, a proper officer of the Corporation may, and upon the written request
of any Holder of Series E Preferred  Stock  (addressed  to the  Secretary at the
principal  office  of the  Corporation)  shall,  call a special  meeting  of the
Holders of Series E Preferred Stock for the election of a director to be elected
by them,  voting as a single class, as herein provided,  such call to be made by
notice  similar to that  provided  in the  Bylaws  for a special  meeting of the
shareholders or as required by law.

                  (iv) Such meeting  shall be held at the  earliest  practicable
date upon the notice  required for annual  meetings of shareholders at the place
for holding annual meetings of shareholders of the Corporation or, if none, at a
place designated by the Secretary of the Corporation.  If such meeting shall not
be called  by a proper  officer  of the  Corporation  within  30 days  after the
personal  service of such written request upon the Secretary of the Corporation,
or within 30 days after mailing the same within the United States, by registered
mail,  addressed to the Secretary of the  Corporation  at its  principal  office
(such  mailing to be  evidenced  by the  registry  receipt  issued by the postal


                                       27
<PAGE>

authorities),  then the  holders  of  record  of 10% of the  shares  of Series E
Preferred Stock then outstanding,  may designate in writing a Holder of Series E
Preferred Stock to call such meeting at the expense of the Corporation, and such
meeting may be called by such person so designated  upon the notice required for
annual  meetings  of  shareholders  and  shall be held at the  same  place as is
elsewhere  provided in this  paragraph  VII(B)(iv)  or at such other place as is
selected by such person so  designated.  Any Holder of Series E Preferred  Stock
that would be  entitled  to vote at any such  meeting  shall have  access to the
stock  books  of the  Corporation  for the  purpose  of  causing  a  meeting  of
shareholders  to be  called  pursuant  to  the  provisions  of  this  paragraph.
Notwithstanding  the  provisions  of this  paragraph,  however,  no such special
meeting shall be called during a period within 90 days immediately preceding the
date fixed for the next annual meeting of shareholders.

                  (v) At any meeting held for the purpose of electing  directors
at which the  Holders of Series E  Preferred  Stock,  voting as a single  class,
shall have the right to elect a director as  provided  herein,  the  presence in
person or by proxy of the Holders of a majority of the then  outstanding  shares
of Series E Preferred  Stock shall be required and be sufficient to constitute a
quorum of such class for the  election of a director by such class.  At any such
meeting or  adjournment  thereof,  (x) the absence of a quorum of the Holders of
Series E Preferred  Stock shall not prevent the election of directors other than
the  director  to be  elected  by such  Holders  and the  absence of a quorum or
quorums of the holders of Capital Stock  entitled to elect such other  directors
shall not  prevent  the  election  of a director to be elected by the Holders of
Series E Preferred Stock,  voting as a single class, and (y) in the absence of a
quorum of the holders of any class of stock entitled to vote for the election of
directors, a majority of the holders present in person or by proxy of such class
shall have the power to adjourn the meeting for the election of directors  which
the  holders of such class are  entitled  to elect,  from time to time,  without
notice (except as required by law) other than announcement at the meeting, until
a quorum shall be present.

                  (vi) The term of office of the director elected by the Holders
of Series E Preferred  Stock,  pursuant to paragraph  VII(B)(i) in office at any
time when the  aforesaid  voting  rights are  vested in the  Holders of Series E
Preferred Stock,  shall terminate upon the election of his/her  successor by the
Holders of the Series E Preferred Stock at any meeting of  shareholders  for the
purpose of electing  directors.  Upon any  termination  of the aforesaid  voting
rights  in  accordance  with  paragraph  VII(B)(ii),  the term of  office of the
director elected pursuant to paragraph  VII(B)(i) then in office shall thereupon
terminate and upon such  termination  the number of directors  constituting  the
Board of Directors  shall,  without further action,  be reduced by one,  subject
always  to the  increase  of the  number  of  directors  pursuant  to  paragraph
VII(B)(i) in case of the future right of the Holders of Series E Preferred Stock
to elect a director as provided herein.

                  (vii) If the director elected pursuant to paragraph VII(B)(ii)
shall cease to serve as director  before his/her term shall expire,  the Holders
of Series E Preferred  Stock then  outstanding,  voting as a single class,  at a
special meeting called as provided  above,  may elect a successor to hold office
for the unexpired terms of the director whose place shall be vacant.



                                       28
<PAGE>

VIII.    CHANGE OF CONTROL.

                  Upon the  occurrence of a Change of Control,  the  Corporation
shall be  required  (subject  to any  contractual  and other  restrictions  with
respect  thereto and the legal  availability of funds therefor) to make an Offer
to Purchase (the "Change of Control Offer") to each Holder of Series E Preferred
Stock to repurchase  all or any part, at the Holder's  option,  of such Holder's
Series  E  Preferred  Stock  at a cash  purchase  price  equal  to  101%  of the
liquidation  preference thereof, plus an amount in cash equal to all accrued and
unpaid dividends  (including an amount in cash equal to a prorated  dividend for
the period from the immediately  preceding  Dividend Payment Date to the date of
purchase) (the "Change of Control Payment"). The Change of Control Offer must be
made within 30 days following the conclusion of all change of control offers for
the Corporation's debt securities, must remain open for at least 30 and not more
than 60 days and must  comply  with the  requirements  of Rule  14e-1  under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent such laws and regulations are applicable.  Prior to commencing any Change
of Control Offer,  the Corporation  shall first consummate any change of control
offer to  purchase  required to be made to any holder of its  Indebtedness.  The
Corporation  shall make the Change of Control Offer within 30 days following the
consummation  of any  mandatory  offers  to  purchase  and  any  other  required
repayments of the Corporation's Indebtedness resulting from a change of control.

IX.      CONSOLIDATION. MERGER AND SALE OF ASSETS.

                  The  Corporation  shall not  consolidate  with,  merge with or
into,  or  sell,  convey,  transfer,  lease  or  otherwise  dispose  of  all  or
substantially all of its property and assets (as an entirety or substantially an
entirety in one transaction or a series of related  transactions) to, any Person
or permit  any  Person to merge  with or into the  Corporation  unless:  (i) the
Corporation  shall be the  continuing  Person,  or the Person (if other than the
Corporation)  formed by such  consolidation  or into  which the  Corporation  is
merged or that  acquired or leased such  property and assets of the  Corporation
shall be a  corporation  organized  and validly  existing  under the laws of the
United States of America or any jurisdiction  thereof and the Series E Preferred
Stock shall be converted  into or exchanged  for and shall become shares of such
successor  company,  having in respect of such  successor  company or  resulting
company substantially the same powers,  preferences and relative  participating,
optional  or  other  special  rights  and  the  qualifications,  limitations  or
restrictions  thereon that the Series E Preferred Stock had immediately prior to
such  transaction in respect of the Corporation;  (ii) immediately  after giving
effect to such  transaction  on a PRO FORMA basis,  (A) the  Corporation  or any
Person  becoming the successor or resulting  company,  as the case may be, shall
have a  Consolidated  Net Worth equal to or greater  than the  Consolidated  Net
Worth  of the  Corporation  immediately  prior  to such  transaction  or (B) the
Corporation or any Person  becoming the successor or resulting  company,  as the
case may be, shall have a  Consolidated  Leverage Ratio no more than the greater
of (I)  6:1  and  (II)  the  Consolidated  Leverage  Ratio  of  the  Corporation
immediately prior to such transaction;  PROVIDED that this clause (ii) shall not
apply  to a  consolidation  or  merger  with or into a Wholly  Owned  Restricted
Subsidiary with a positive net worth; PROVIDED that, in connection with any such
merger or consolidation,  no consideration (other than Capital Stock (other than
Disqualified  Stock) in the surviving Person or the Corporation) shall be issued


                                       29
<PAGE>

or distributed to the stockholders of the Corporation; and (iii) the Corporation
delivers  to  the  Transfer  Agent  an  Officers'  Certificate   (attaching  the
arithmetic  computations to demonstrate compliance with clause (ii)) and Opinion
of Counsel,  in each case  stating that such  consolidation,  merger or transfer
complies with this  provision  and that all  conditions  precedent  provided for
herein relating to such transaction have been complied with; PROVIDED,  HOWEVER,
that clause (ii) above does not apply if, in the good faith determination of the
Board of Directors of the Corporation, whose determination shall be evidenced by
a Board  Resolution,  the principal purpose of such transaction is to change the
state of  incorporation  of the Corporation and any such  transaction  shall not
have as one of its purposes the evasion of the foregoing limitations.

X.       EXCHANGE.

                  (A) The  Corporation  may,  at the sole option of the Board of
Directors (subject to the legal  availability of funds therefor),  exchange all,
but not  less  than  all,  of the  shares  of  Series  E  Preferred  Stock  then
outstanding,  including any shares of Series E Preferred Stock issued as payment
for  dividends,  for a new  series  of  senior  subordinated  debentures  of the
Corporation  (the "Exchange  Debentures")  to be issued pursuant to an indenture
(the  "Indenture")  qualified under the Trust Indenture Act of 1939, as amended,
substantially  in the form  attached as an exhibit to the Purchase  Agreement (a
copy of which  shall be  provided  to any  Holder  upon  written  request to the
Secretary  of the  Corporation),  at any time  following  the date on which such
exchange is  permitted  by the terms of the  then-existing  Indebtedness  of the
Corporation and subject to the conditions contained in paragraph X(B) below. The
Exchange  Debentures will be issued in registered form, without coupons, be duly
executed,  authenticated  as of the date on which the exchange is effective  and
dated the date of  exchange.  In the event of an  exchange,  Holders of Series E
Preferred  shall  be  entitled  to  receive  on the  date of  exchange  Exchange
Debentures  having an aggregate  principal  amount equal to (i) the total of the
liquidation preference for each share of Series E Preferred exchanged, PLUS (ii)
an amount  equal to all  accrued  but  unpaid  dividends  payable  on such share
(including  a prorated  dividend for the period from the  immediately  preceding
Dividend Payment Date to the date of exchange). In the event such exchange would
result in the  issuance of Exchange  Debentures  in a principal  amount which is
less than $1,000 or which is not an integral  multiple of $1,000 (such principal
amount less than $1,000 or the difference  between such principal amount and the
highest integral of $1,000 which is less than such principal amount, as the case
may be, is hereinafter  referred to as the "Fractional  Principal Amount"),  the
Corporation may,  subject to any restrictions in the terms of the  then-existing
Indebtedness of the  Corporation,  at the option of the Board of Directors,  pay
cash to each  Holder  of  Series E  Preferred  in lieu of  Fractional  Principal
Amounts of Exchange Debentures  otherwise issuable upon exchange of the Series E
Preferred Stock. The Person entitled to receive the Exchange Debentures issuable
upon exchange shall be treated for all purposes as the registered holder of such
Exchange  Debentures as of the date of exchange.  The  Corporation  will mail to
each Holder of Series E  Preferred  Stock  written  notice of its  intention  to
exchange no less than 20 nor more than 60 days prior to the date of exchange.

                  (B) As a condition  of the right of the  Corporation  to issue
Exchange Debentures in exchange for the Series E Preferred Stock under paragraph
(A) above, on the date of exchange,  (A) there shall be legally  available funds


                                       30
<PAGE>

sufficient  therefor;  (B) a  registration  statement  relating to the  Exchange
Debentures shall have been declared  effective under the Securities Act prior to
such exchange and shall continue to be effective on the date of exchange, or the
Corporation  shall  have  obtained  a written  opinion  of its  outside  counsel
reasonably  acceptable  to  Holders  of a  majority  of the  shares  of Series E
Preferred  Stock that an exemption  from the  registration  requirements  of the
Securities  Act is  available  for such  exchange  and that upon receipt of such
Exchange  Debentures  pursuant to such an exchange made in accordance  with such
exemption,  each holder of an Exchange Debenture that is not an Affiliate of the
Corporation  will not be subject to any  restrictions  imposed by the Securities
Act upon the resale of such  Exchange  Debenture,  and such  exemption is relied
upon by the  Corporation  for such  exchange,  (C) the Indenture and the trustee
thereunder  shall have been qualified  under the Trust Indenture Act of 1939, as
amended;  (D)  immediately  after giving effect to such exchange,  no default or
event  of  default  would  exist  under  any  of  the   Corporation's   existing
Indebtedness;  and (E) the Corporation shall have delivered to the Trustee under
the  Indenture  a  written  opinion  of  counsel,  dated  the date of  exchange,
regarding the  satisfaction  of the conditions set forth in clauses (A), (B) and
(C).

XI. COVENANTS.

                  (A)      LIMITATION ON Indebtedness

                  (a) The Corporation  shall not, and will not permit any of its
Restricted  Subsidiaries  to, Incur any  Indebtedness  (other than  Indebtedness
existing  on  the  Closing  Date);  provided  that  the  Corporation  may  Incur
Indebtedness if, after giving effect to the Incurrence of such  Indebtedness and
the receipt and application of the proceeds therefrom, the Consolidated Leverage
Ratio would be greater than zero and less than 6:1.

                  Notwithstanding   the  foregoing,   the  Corporation  and  any
Restricted  Subsidiary (except as specified below) may Incur each and all of the
following:  (i) Indebtedness  outstanding at any time in an aggregate  principal
amount not to exceed $400 million; (ii) Indebtedness in existence on the Closing
Date;  (iii)  Indebtedness  of the  Corporation  to a Restricted  Subsidiary and
Indebtedness of a Restricted Subsidiary to the Corporation or another Restricted
Subsidiary;  PROVIDED that such Indebtedness is made pursuant to an intercompany
note and any event which results in any such Restricted Subsidiary ceasing to be
a Restricted  Subsidiary or any subsequent  transfer of such Indebtedness (other
than to the Corporation or another  Restricted  Subsidiary)  shall be deemed, in
each case, to constitute  an  Incurrence of such  Indebtedness  not permitted by
this clause (iii); (iv) Indebtedness issued in exchange for, or the net proceeds
of which are used to refinance or refund,  then outstanding  Indebtedness (other
than  Indebtedness  Incurred  under  clause  (i),  (iii),  (v) or  (ix)  of this
paragraph) and any refinancings thereof in an amount not to exceed the amount so
refinanced or refunded (plus  premiums,  accrued  interest,  fees and expenses);
PROVIDED that such new Indebtedness,  determined as of the date of Incurrence of
such new  Indebtedness,  does  not  mature  or have a  mandatory  redemption  or
repurchase  date  prior  to  the  Stated  Maturity  of  the  Indebtedness  to be
refinanced  or  refunded,  and the Average Life of such new  Indebtedness  is at
least equal to the remaining  Average Life of the  Indebtedness to be refinanced
or refunded;  (v)  Indebtedness  (A) in respect of performance,  surety,  appeal


                                       31
<PAGE>

bonds and completion guarantees provided in the ordinary course of business; (B)
under  Currency  Agreements  and Interest  Rate  Agreements;  PROVIDED that such
agreements (a) are designed  solely to protect the Corporation or its Restricted
Subsidiaries against fluctuations in foreign currency exchange rates or interest
rates and (b) do not increase the Indebtedness of the obligor outstanding at any
time (except to the extent Incurred under another clause hereof) other than as a
result of fluctuations in foreign  currency  exchange rates or interest rates or
by reason of fees,  indemnities and  compensation  payable  thereunder;  and (C)
arising from agreements  providing for  indemnification,  adjustment of purchase
price or similar  obligations,  or from Guarantees or letters of credit,  surety
bonds or performance bonds securing any obligations of the Corporation or any of
its Restricted  Subsidiaries pursuant to such agreements,  in each case Incurred
in  connection  with the  disposition  of any  business,  assets  or  Restricted
Subsidiary  (other  than  Guarantees  of  Indebtedness  Incurred  by any  Person
acquiring all or any portion of such business,  assets or Restricted  Subsidiary
for the purpose of financing  such  acquisition),  in a principal  amount not to
exceed the gross proceeds actually received by the Corporation or any Restricted
Subsidiary  in  connection  with  such  disposition;  (vi)  Indebtedness  of the
Corporation,  to the extent the net  proceeds  thereof are  promptly (A) used to
purchase the Series E Preferred  Stock and/or Series F Preferred  Stock tendered
in an Offer to Purchase made as a result of a Change in Control or (B) deposited
to  defease  the  Senior  Discount  Notes  or used to  redeem  all the  Series E
Preferred  Stock or Series F Preferred  Stock;  (vii)  Indebtedness  Incurred to
finance  the cost  (including  the  cost of  design,  development,  acquisition,
construction,  installation,  improvement,  transportation  or  integration)  to
acquire equipment, inventory or network assets (including acquisitions by way of
acquisitions of real property,  leasehold  improvements,  Capitalized Leases and
acquisitions  of the  Capital  Stock  of a  Person  that  becomes  a  Restricted
Subsidiary to the extent of the fair market value of the equipment, inventory or
network assets so acquired) by the Corporation or a Restricted  Subsidiary after
the Closing Date;  (viii)  Indebtedness of the Corporation not to exceed, at any
one time outstanding, two times the sum of (A) the Net Cash Proceeds received by
the  Corporation  on or after the Closing Date from the issuance and sale of its
Capital  Stock  (other  than  Disqualified  Stock)  to a  Person  that  is not a
Subsidiary  of the  Corporation,  to the extent such Net Cash  Proceeds have not
been used pursuant to clause  (iii)(B)(2) of the first  paragraph or clause (ii)
of the second  paragraph  of Section  XI(B) or clause (v) of the  definition  of
"Permitted  Investments"  to make a  Restricted  Payment and (B) 80% of the fair
market value of property (other than cash and cash equivalents)  received by the
Corporation  after the Closing  Date from the sale of its Capital  Stock  (other
than  Disqualified  Stock)  to  a  Person  that  is  not  a  Subsidiary  of  the
Corporation, to the extent such sale of Capital Stock has not been used pursuant
to clause (iii) of the second  paragraph  of Section  XI(B) to make a Restricted
Payment;  PROVIDED that such Indebtedness does not mature prior to the Mandatory
Redemption  Date;  (ix)  Indebtedness  Incurred by the Corporation or any of its
Restricted Subsidiaries  constituting  reimbursement obligations with respect to
letters  of  credit  in the  ordinary  course of  business,  including,  without
limitation, letters of credit in respect of workers' compensation claims or self
insurance,  or other Indebtedness with respect to reimbursement type obligations
regarding workers' compensation claims; PROVIDED, HOWEVER, that upon the drawing
of  such  letters  of  credit  or the  Incurrence  of  such  Indebtedness,  such
obligations are reimbursed  within 30 days following such drawing or Incurrence;
(x)  Indebtedness  of Persons that are acquired by the Corporation or any of its
Restricted  Subsidiaries  or merged into a Restricted  Subsidiary  in accordance
with  the  terms  of  this  Certificate  of  Designations;  PROVIDED  that  such


                                       32
<PAGE>

Indebtedness is not incurred in contemplation of such acquisition or merger; and
PROVIDED FURTHER that after giving effect to such acquisition or merger,  either
(x) the  Corporation  would be permitted  to incur at least $1.00 of  additional
Indebtedness  pursuant to the Consolidated  Leverage Ratio test set forth in the
first sentence of this covenant or (y) the Consolidated  Leverage Ratio is lower
(if greater than zero) or higher (if less than zero) than  immediately  prior to
such  acquisition;   (xi)  Strategic   Subordinated   Indebtedness;   and  (xii)
Indebtedness under the Lucent Facility.

                  (b) Notwithstanding any other provision of this Section XI(A),
the  maximum  amount  of  Indebtedness  that  the  Corporation  or a  Restricted
Subsidiary  may Incur  pursuant to this Section  XI(A) shall not be deemed to be
exceeded, with respect to any outstanding  Indebtedness due solely to the result
of fluctuations in the exchange rates of currencies.  Accretion on an instrument
issued  at a  discount  will  not be  deemed  to  constitute  an  Incurrence  of
Indebtedness.

                  (c) For  purposes  of  determining  any  particular  amount of
Indebtedness  pursuant to this Section XI(A),  Guarantees,  Liens or obligations
with respect to letters of credit supporting  Indebtedness otherwise included in
the   determination   of  such  particular   amount  shall  not  be  treated  as
Indebtedness. For purposes of determining compliance with this Section XI(A), in
the event that an item of  Indebtedness  meets the  criteria of more than one of
the types of Indebtedness  described in the above clauses,  the Corporation,  in
its sole  discretion,  shall  classify  such  item of  Indebtedness  and only be
required  to include  the amount  and type of such  Indebtedness  in one of such
clauses.

(B)      LIMITATION ON RESTRICTED PAYMENTS

                  The Corporation shall not, and shall not permit any Restricted
Subsidiary to,  directly or indirectly,  (i) declare or pay any dividend or make
any  distribution  on or with respect to its Junior  Securities  (other than (x)
dividends or  distributions  payable  solely in shares of its Junior  Securities
(other  than  Disqualified  Stock) or in options,  warrants  or other  rights to
acquire  shares  of  such  Junior  Securities  and  (y) pro  rata  dividends  or
distributions  on  Common  Stock of  Restricted  Subsidiaries  held by  minority
stockholders)  held  by  Persons  other  than  the  Corporation  or  any  of its
Restricted Subsidiaries,  (ii) purchase, redeem, retire or otherwise acquire for
value any shares of Junior  Securities of (A) the Corporation or an Unrestricted
Subsidiary  (including options,  warrants or other rights to acquire such shares
of Junior  Securities)  held by any Person or (B) a Restricted  Subsidiary other
than a Wholly Owned Restricted Subsidiary (including options,  warrants or other
rights to acquire such shares of Junior Securities) held by any Affiliate of the
Corporation (other than a Wholly Owned Restricted Subsidiary), or (iii) make any
Investment,  other than a Permitted Investment,  in any Person (such payments or
any  other   actions   described  in  clauses  (i)  through  (iii)  above  being
collectively  "Restricted Payments") if, at the time of, and after giving effect
to, the proposed  Restricted  Payment:  (A) the  Corporation  could not Incur at
least $1.00 of  Indebtedness  under the first paragraph of Section XI(A), or (B)
the aggregate  amount of all Restricted  Payments (the amount,  if other than in
cash,  to  be  determined  in  good  faith  by  the  Board  of  Directors  whose
determination  shall be  conclusive  and evidenced by a Board  Resolution)  made
after the Closing Date shall exceed the sum of (1) 50% of the  aggregate  amount
of the Adjusted  Consolidated  Net Income (or, if the Adjusted  Consolidated Net


                                       33
<PAGE>

Income  is a  loss,  minus  100% of the  amount  of such  loss)  (determined  by
excluding  income  resulting  from  transfers of assets by the  Corporation or a
Restricted  Subsidiary to an  Unrestricted  Subsidiary)  accrued on a cumulative
basis during the period (taken as one accounting  period) beginning on the first
day of the fiscal quarter  immediately  following the Closing Date and ending on
the last day of the last fiscal quarter preceding the Transaction Date for which
reports have been provided to the Transfer  Agent PLUS (2) 100% of the aggregate
Net Cash Proceeds and the actual market value of marketable  securities  (on the
date the calculation  hereunder is made) received by the  Corporation  after the
Closing  Date  from the  issuance  and sale  permitted  by this  Certificate  of
Designations  of its Capital Stock (other than  Disqualified  Stock) to a Person
who is not a  Subsidiary  of the  Corporation,  including  an  issuance  or sale
permitted by this Certificate of Designations of Indebtedness of the Corporation
for cash subsequent to the Closing Date upon the conversion of such Indebtedness
into Capital Stock (other than Disqualified  Stock) of the Corporation,  or from
the  issuance  to a Person who is not a  Subsidiary  of the  Corporation  of any
options,  warrants or other rights to acquire  Capital Stock of the  Corporation
(in each case,  exclusive of any Disqualified Stock or any options,  warrants or
other rights that are redeemable at the option of the holder, or are required to
be redeemed,  prior to the Mandatory Redemption Date), and the Net Cash Proceeds
from any capital  contributions  to the Corporation  after the Closing Date from
Persons other than Subsidiaries of the Corporation,  in each case excluding such
Net Cash  Proceeds to the extent used to Incur  Indebtedness  pursuant to clause
(viii) of the second  paragraph of Section XI(A) and excluding Net Cash Proceeds
from the  issuance  of  Capital  Stock to the  extent  used to make a  Permitted
Investment in accordance  with clause (v) of such defined term, plus (3) amounts
received  from  Investments  (other than  Permitted  Investments)  in any Person
resulting from payments of interest on  Indebtedness,  dividends,  repayments of
loans or advances, or other transfers of assets, in each case to the Corporation
or any Restricted  Subsidiary or from the Net Cash Proceeds from the sale of any
such  Investment  (except,  in each  case,  to the  extent  any such  payment or
proceeds are included in the calculation of Adjusted  Consolidated  Net Income),
or from redesignations of Unrestricted  Subsidiaries as Restricted  Subsidiaries
(valued in each case as provided in the  definition  of  "Investments"),  not to
exceed,  in  each  case,  the  amount  of  Investments  previously  made  by the
Corporation  or  any  Restricted  Subsidiary  in  such  Person  or  Unrestricted
Subsidiary or (C) dividends on Series E Preferred Stock shall not have been paid
in full as provided in this Certificate of Designations.

                  The  foregoing  provision  shall not be violated by reason of:
(i) the  payment of any  dividend  within 60 days after the date of  declaration
thereof if, at said date of  declaration,  such  payment  would  comply with the
foregoing  paragraph;  (ii) the redemption,  repurchase or other  acquisition of
Junior Securities of the Corporation  including premium, if any, and accrued and
unpaid  dividends,  with the proceeds of, or in exchange for, Junior  Securities
(other  than  Disqualified   Stock)  of  the  Corporation;   (iii)  payments  or
distributions,  to dissenting  stockholders pursuant to applicable law, pursuant
to or in  connection  with a  consolidation,  merger or  transfer of assets that
complies  with Article IX; (iv) the  declaration  or payment of dividends on the
Common  Stock of the  Corporation  following  a Public  Equity  Offering of such
Common  Stock,  of up to 6% per annum of the Net Cash  Proceeds  received by the
Corporation in such Public Equity  Offering;  (v) the repurchase,  retirement or
other  acquisition or retirement for value of any shares of Junior Securities of
the Corporation  that are not registered  under the Exchange Act and are held by


                                       34
<PAGE>

any current or former employee,  director or consultant (or their estates or the
beneficiaries  of such estates) of the  Corporation  or any  Subsidiary,  not to
exceed  (A) in any  calendar  year  $2.0  million  or (B)  $5.0  million  in the
aggregate;  (vi) repurchases of Junior  Securities deemed to occur upon exercise
of stock  options if such  Capital  Stock  represents  a portion of the exercise
price  of such  options;  (vii)  repurchases  of  fractional  shares  of  Junior
Securities  in connection  with the exercise of Warrants in accordance  with the
Warrant  Agreement and Preferred  Stock Warrant  Agreement or other  warrants to
purchase the Corporation's Common Stock; and (viii) other Restricted Payments in
an aggregate amount not to exceed $2.0 million.

                  Each Restricted  Payment  permitted  pursuant to the preceding
paragraph (other than the Restricted Payment referred to in clauses (ii) or (vi)
thereof,  an  exchange  of  Junior  Securities  for  Junior  Securities  and  an
Investment  referred to in clause (iv) thereof) shall be included in calculating
whether the conditions of clause (iii)(B) of the first paragraph of this Section
XI(B) have been met with respect to any subsequent  Restricted Payments.  In the
event the proceeds of an issuance of Capital Stock of the  Corporation  are used
for the redemption,  repurchase or other acquisition of Parity Securities,  then
the Net Cash Proceeds of such issuance  shall be included in clause  (iii)(B) of
the first  paragraph of this Section  XI(B) only to the extent such proceeds are
not used for such redemption, repurchase or other acquisition of securities.

                  Any  Restricted  Payments  made  other  than in cash  shall be
valued at fair market value.  The amount of any Investment  "outstanding" at any
time  shall be deemed to be equal to the amount of such  Investment  on the date
made,  less  the  return  of  capital  to the  Corporation  and  its  Restricted
Subsidiaries with respect to such Investment by distribution,  sale or otherwise
(up to the amount of such Investment on the date made).

(C)      LIMITATION ON DIVIDEND AND OTHER PAYMENT RESTRICTIONS
         AFFECTING RESTRICTED SUBSIDIARIES

                  The Corporation shall not, and shall not permit any Restricted
Subsidiary to, create or otherwise cause or suffer to exist or become  effective
any  consensual  encumbrance  or  restriction  of any kind on the ability of any
Restricted  Subsidiary  to (i) pay  dividends  or make any  other  distributions
permitted by applicable law on any Capital Stock of such  Restricted  Subsidiary
owned  by the  Corporation  or any  other  Restricted  Subsidiary,  (ii) pay any
Indebtedness owed to the Corporation or any other Restricted  Subsidiary,  (iii)
make loans or advances to the Corporation or any other Restricted  Subsidiary or
(iv)  transfer  any of its  property or assets to the  Corporation  or any other
Restricted Subsidiary.

                  The foregoing  provisions  shall not restrict any encumbrances
or restrictions:

                  (i) existing on the Closing  Date,  in the Newcourt  Facility,
the Lucent Facility, this Certificate of Designations or any other agreements in
effect on the  Closing  Date,  and any  extensions,  refinancings,  renewals  or
replacements of such agreements; PROVIDED that the encumbrances and restrictions
in any such  extensions,  refinancings,  renewals  or  replacements  are no less
favorable in any  material  respect to the Holders  than those  encumbrances  or
restrictions  that are then in effect and that are being  extended,  refinanced,


                                       35
<PAGE>

renewed or replaced;  (ii) existing under or by reason of applicable  law, rule,
regulation or order;  (iii)  existing with respect to any Person or the property
or  assets  of  such  Person  acquired  by the  Corporation  or  any  Restricted
Subsidiary,  existing  at the  time of such  acquisition  and  not  incurred  in
contemplation  thereof, which encumbrances or restrictions are not applicable to
any Person or the property or assets of any Person other than such Person or the
property or assets of such Person so  acquired;  (iv) in the case of clause (iv)
of the first  paragraph of this Section XI(C),  (A) that restrict in a customary
manner the subletting, assignment or transfer of any property or asset that is a
lease,  license,  conveyance  or  contract  or similar  property  or asset,  (B)
existing by virtue of any  transfer of,  agreement to transfer,  option or right
with  respect to, or Lien on, any property or assets of the  Corporation  or any
Restricted   Subsidiary  not  otherwise   prohibited  by  this   Certificate  of
Designations,  (C) arising or agreed to in the ordinary course of business,  not
relating to any Indebtedness, and that do not, individually or in the aggregate,
detract  from  the  value  of  property  or  assets  of the  Corporation  or any
Restricted  Subsidiary  in  any  manner  material  to  the  Corporation  or  any
Restricted Subsidiary or (D) purchase money obligations for property acquired in
the ordinary course of business that impose restrictions of the nature discussed
in clause  (iv)  above on the  property  so  acquired;  (v) with  respect to the
Corporation or a Restricted Subsidiary and imposed pursuant to an agreement that
has been entered  into for the sale of assets,  including,  without  limitation,
customary  restrictions  on the disposition of all or  substantially  all of the
Capital Stock of, or property and assets of, such  Restricted  Subsidiary or the
Corporation;  (vi) contained in the terms of any  Indebtedness  or any agreement
pursuant  to which  such  Indebtedness  was  issued  (in each  case  other  than
Indebtedness  incurred  under the Newcourt  Facility) if (A) the  encumbrance or
restriction  applies  only in the event of a payment  default or a default  with
respect to a financial covenant contained in such Indebtedness or agreement, (B)
the  encumbrance or restriction is not materially  more  disadvantageous  to the
Holders  of the  Series  E  Preferred  Stock  than is  customary  in  comparable
financings (as determined by the Corporation) and (C) the Corporation determines
that  any  such  encumbrance  or  restriction  will not  materially  affect  the
Corporation's  ability to make dividend and mandatory redemption payments on the
Series E Preferred  Stock;  (vii)  restrictions on cash or other deposits or net
worth imposed by customers under  contracts  entered into in the ordinary course
of business;  (viii) customary  provisions in joint venture agreements and other
similar agreements entered into in the ordinary course of business; and (ix) any
encumbrances or restrictions of the type referred to in clauses  (i)-(iv) of the
first  paragraph  of this  covenant  imposed by any  amendments,  modifications,
renewals,  restatements,  increases,  supplements,  refundings,  replacements or
refinancings  of the contracts  referred to in clauses (i) through (viii) above;
PROVIDED that such amendments, modifications, restatements, renewals, increases,
supplements,  refundings,  replacements or  refinancings  are, in the good faith
judgment of the Corporation,  not materially more disadvantageous to the Holders
than those contained in the restriction  prior to such amendment,  modification,
restatement,   renewal,   increase,   supplement,   refunding,   replacement  or
refinancing.   Nothing  contained  in  this  Section  XI(C)  shall  prevent  the
Corporation  or any Restricted  Subsidiary  from  restricting  the sale or other
disposition  of property or assets of the  Corporation  or any of its Restricted
Subsidiaries  that  secure  Indebtedness  of  the  Corporation  or  any  of  its
Restricted Subsidiaries.


                                       36
<PAGE>

         (D)      LIMITATION  ON  THE  ISSUANCE  AND  SALE OF  CAPITAL  STOCK OF
                  RESTRICTED SUBSIDIARIES

                  The  Corporation  shall not sell,  and  shall not  permit  any
Restricted Subsidiary,  directly or indirectly,  to issue or sell, any shares of
Capital Stock of a Restricted Subsidiary  (including options,  warrants or other
rights to purchase  shares of such Capital Stock) except (i) to the  Corporation
or a Wholly Owned Restricted Subsidiary; (ii) issuances of director's qualifying
shares or sales to  foreign  nationals  of shares of  Capital  Stock of  foreign
Restricted  Subsidiaries,  to the extent  required by applicable  law; (iii) if,
immediately  after  giving  effect to such  issuance  or sale,  such  Restricted
Subsidiary would no longer constitute a Restricted Subsidiary and any Investment
in such Person remaining after giving effect to such issuance or sale would have
been  permitted to be made in accordance  with Section XI(B) if made on the date
of such  issuance  or sale;  or (iv)  issuances  or sales of  common  stock of a
Restricted   Subsidiary,   PROVIDED  that  the  Corporation  or  any  Restricted
Subsidiary  applies  an  amount  equal  to the  Net  Cash  Proceeds  thereof  in
accordance with Section XI(F).

         (E)      LIMITATION ON TRANSACTIONS WITH SHAREHOLDERS AND AFFILIATES

                  The Corporation shall not, and shall not permit any Restricted
Subsidiary  to,  directly  or  indirectly,  enter  into,  renew  or  extend  any
transaction  (including,  without  limitation,  the  purchase,  sale,  lease  or
exchange  of property  or assets,  or the  rendering  of any  service)  with any
Affiliate of the Corporation or any Restricted Subsidiary,  except upon fair and
reasonable  terms  no less  favorable  to the  Corporation  or  such  Restricted
Subsidiary than could be obtained,  at the time of such  transaction or, if such
transaction is pursuant to a written agreement,  at the time of the execution of
the agreement providing therefor,  in a comparable arm s-length transaction with
a Person that is not an Affiliate.

                  The foregoing  limitation does not limit,  and shall not apply
to (i) transactions (A) approved by a majority of the  disinterested  members of
the  Board  of  Directors  or (B) for  which  the  Corporation  or a  Restricted
Subsidiary  delivers to the  Transfer  Agent a written  opinion of a  nationally
recognized  investment  banking  firm or a  nationally  recognized  firm  having
expertise  in the  specific  area  which is the  subject  of such  determination
stating  that the  transaction  is fair to the  Corporation  or such  Restricted
Subsidiary from a financial  point of view; (ii) any transaction  solely between
the  Corporation  and  any of its  Restricted  Subsidiaries  or  solely  between
Restricted  Subsidiaries;  (iii) the payment of reasonable and customary regular
fees to, and indemnity provided on behalf of, officers, directors,  employees or
consultants of the Corporation or its Restricted Subsidiaries; (iv) any payments
or  other  transactions  pursuant  to  any  tax-sharing  agreement  between  the
Corporation and any other Person with which the Corporation files a consolidated
tax return or with which the Corporation is part of a consolidated group for tax
purposes; (v) any agreement as in effect as of the Closing Date or any amendment
thereto (so long as any such amendment is not  disadvantageous to the Holders in
any  material  respect);  (vi)  the  existence  of,  or the  performance  by the
Corporation or any of its Restricted  Subsidiaries of its obligations  under the
terms  of,  any  stockholders   agreement  (including  any  registration  rights
agreement or purchase  agreement  related  thereto) to which it is a party as of
the Closing Date and any similar  agreements  which it may enter into thereafter
(so long as any such  amendment  is not  disadvantageous  to the  Holders in any
material respect);  or (vii) any Permitted  Investments and Restricted  Payments
not prohibited by Section XI(B).  Notwithstanding the foregoing, any transaction


                                       37
<PAGE>

or series of related transactions covered by the first paragraph of this Section
XI(E) and not  covered by  clauses  (ii)  through  (vii) of this  paragraph  the
aggregate  amount of which  exceeds $3.0  million in value,  must be approved or
determined to be fair in the manner provided for in clause (i)(A) or (B) above.

         (F)      LIMITATION ON ASSET SALES

                  The Corporation shall not, and shall not permit any Restricted
Subsidiary to, consummate any Asset Sale, unless (i) the consideration  received
by the Corporation or such  Restricted  Subsidiary is at least equal to the fair
market  value of the  assets  sold or  disposed  of and (ii) at least 75% of the
consideration  received  consists of cash or  Temporary  Cash  Investments.  For
purposes  of this  covenant,  the  following  are  deemed  to be  cash:  (x) the
principal  amount or accreted value (whichever is larger) of Indebtedness of the
Corporation or any Restricted  Subsidiary  with respect to which the Corporation
or such  Restricted  Subsidiary has either (A) received a written release or (B)
been  released by operation of law, in either case,  from all  liability on such
Indebtedness in connection  with such Asset Sale and (y) securities  received by
the  Corporation  or any  Restricted  Subsidiary  from the  transferee  that are
promptly  converted by the Corporation or such Restricted  Subsidiary into cash.
In the  event  and to the  extent  that the Net Cash  Proceeds  received  by the
Corporation or any of its Restricted  Subsidiaries  from one or more Asset Sales
occurring  on or after the Closing Date in any period of 12  consecutive  months
exceed 10% of Adjusted  Consolidated  Net Tangible Assets  (determined as of the
date  closest  to  the   commencement  of  such  12-month  period  for  which  a
consolidated  balance sheet of the  Corporation  and its  Subsidiaries  has been
provided to the Transfer Agent),  then the Corporation  shall or shall cause the
relevant  Restricted  Subsidiary to (i) within 12 months after the date Net Cash
Proceeds so received exceed 10% of Adjusted Consolidated Net Tangible Assets (A)
apply an amount  equal to such  excess Net Cash  Proceeds to  permanently  repay
Indebtedness of the Corporation, repay Indebtedness of any Restricted Subsidiary
or redeem  any  Senior  Securities,  in each case owing to, or held by, a Person
other than the  Corporation or any of its Restricted  Subsidiaries or (B) invest
an equal amount,  or the amount not so applied  pursuant to clause (A) (or enter
into a definitive  agreement  committing to so invest within 12 months after the
date of such agreement),  in property or assets (other than current assets) of a
nature  or type or that are used in a  business  (or in a Person  (other  than a
natural  person) having property and assets of a nature or type, or engaged in a
business)  similar or related to the nature or type of the  property  and assets
of, or the business of, the Corporation and its Restricted Subsidiaries existing
on the date of such  investment  (as  determined  in good  faith by the Board of
Directors  whose  determination  shall be  conclusive  and  evidenced by a Board
Resolution)  and  (ii)  apply  (no  later  than the end of the  12-month  period
referred  to in clause  (i)) such  excess Net Cash  Proceeds  (to the extent not
applied  pursuant to clause (i)) as provided in the following  paragraph of this
Section  XI(F).  The amount of such  excess  Net Cash  Proceeds  required  to be
applied (or to be committed to be applied)  during such  12-month  period as set
forth in clause (i) of the preceding  sentence and not applied as so required by
the end of such period shall constitute "Excess Proceeds."

                  If, as of the first day of any calendar  month,  the aggregate
amount  of Excess  Proceeds  not  theretofore  subject  to an Offer to  Purchase
pursuant to this Section XI(F) totals at least $5 million,  the Corporation must


                                       38
<PAGE>

commence,  not  later  than  the  fifteenth  Business  Day of  such  month,  and
consummate  an Offer to Purchase  from the  Holders on a pro rata basis,  and an
offer to purchase any  outstanding  Parity  Securities  with similar  provisions
requiring the  Corporation to make an offer to purchase such  securities,  in an
aggregate  liquidation  preference  of Series E Preferred  Stock and such Parity
Securities  equal to (A) with  respect  to the  Series E  Preferred  Stock,  the
product of such Excess Proceeds multiplied by a fraction, the numerator of which
is the  liquidation  preference  of the  outstanding  shares  of  the  Series  E
Preferred  Stock  and the  denominator  of which  is the sum of the  outstanding
liquidation  preference  of  the  Series  E  Preferred  Stock  and  such  Parity
Securities (the product hereinafter referred to as the "Series E Preferred Stock
Amount"),  and (B) with  respect  to the  Parity  Securities,  the excess of the
Excess  Proceeds over the Series E Preferred  Stock Amount,  at a purchase price
equal to 100% of the  liquidation  preference of the Series E Preferred Stock or
such Parity Securities, as the case may be, on the relevant Payment Date or such
other date set forth in the documentation governing the Parity Securities, plus,
in each case,  accrued dividends (if any) to the Payment Date or such other date
set forth in the documentation governing the Parity Securities. If the aggregate
purchase price of the Preferred Stock tendered pursuant to the Offer to Purchase
is less than the Excess Proceeds, the remaining will be available for use by the
Corporation for general corporate  purposes.  Upon the consummation of any Offer
to Purchase in accordance  with the terms of this  Certificate of  Designations,
the amount of Net Cash  Proceeds from Asset Sales subject to any future Offer to
Purchase shall be deemed to be zero.  Prior to commencing any Offer to Purchase,
the Corporation shall first consummate any offer to purchase required to be made
to any Holder of its Indebtedness.

         (G) COMMISSION REPORTS AND REPORTS TO HOLDERS.

                  While the Series E Preferred Stock is outstanding,  whether or
not the  Corporation is then required to file reports with the  Commission,  the
Corporation  shall deliver for filing with the  Commission  all such reports and
other  information  as it would be  required  to file  with  the  Commission  by
Sections 13(a) or 15(d) under the Exchange Act if it were subject  thereto.  All
references  herein to reports  "filed"  with the  Commission  shall be deemed to
refer to the reports then most  recently  delivered  for filing,  whether or not
accepted by the Commission.

XII.     MUTILATED OR MISSING SERIES E PREFERRED STOCK CERTIFICATES.

                  If any of the Series E Preferred Stock  certificates  shall be
mutilated,  lost, stolen or destroyed,  the Corporation shall issue, in exchange
and in  substitution  for  and  upon  cancellation  of the  mutilated  Series  E
Preferred Stock  certificate,  or in lieu of and  substitution  for the Series E
Preferred Stock certificate lost, stolen or destroyed,  a new Series E Preferred
Stock  certificate of like tenor and representing an equivalent amount of shares
of Series E  Preferred  Stock,  but only upon  receipt of evidence of such loss,
theft or destruction of such Series E Preferred Stock certificate and indemnity,
if requested, satisfactory to the Corporation.


                                       39
<PAGE>

XIII.    REISSUANCE:  PREEMPTIVE RIGHTS

                  (i) Shares of Series E  Preferred  Stock that have been issued
and  reacquired in any manner,  including  shares  purchased or redeemed,  shall
(upon  compliance  with any  applicable  provisions  of the laws of the State of
Delaware) have the status of authorized and unissued  shares of Preferred  Stock
undesignated  as to series and may be  redesignated  and reissued as part of any
series of Preferred Stock.

                  (ii) No shares  of Series E  Preferred  Stock  shall  have any
rights of preemption whatsoever as to any securities of the Corporation,  or any
warrants,  rights or options issued or granted with respect thereto,  regardless
of how such  securities or such  warrants,  rights or options may be designated,
issued or granted.

XIV.     BUSINESS DAY.

                  If any  payment or  redemption  shall be required by the terms
hereof  to be  made  on a day  that  is not a  Business  Day,  such  payment  or
redemption  shall  be made on the  immediately  succeeding  Business  Day and no
further dividends shall accrued after the day payment was required.

XV.      HEADINGS OF SUBDIVISIONS.

                  The   headings   of  various   subdivisions   hereof  are  for
convenience of reference only and shall not affect the  interpretation of any of
the provisions hereof.



                                       40
<PAGE>

XVI.     SEVERABILITY OF PROVISIONS.

                  If  any  right,  preference  or  limitation  of the  Series  E
Preferred Stock set forth in this Certificate of Designations (as may be amended
from time to time) is invalid, unlawful or incapable of being enforced by reason
of any  rule  or  law or  public  policy,  all  other  rights,  preferences  and
limitations set forth in this Certificate of Designations, as amended, which can
be given effect without the invalid, unlawful or unenforceable right, preference
or limitation shall, nevertheless remain in full force and effect, and no right,
preference or  limitation  herein set forth shall be deemed  dependent  upon any
other such right, preference or limitation unless so expressed herein.

XVII.    NOTICE

                  All  notices,  requests,  demands,  and  other  communications
hereunder  shall be in  writing  and shall be deemed to have been duly  given if
delivered by hand or when sent by telex or telecopier (with receipt  confirmed),
provided  a copy is also  sent by  express  (overnight,  if  possible)  courier,
addressed (i) in the case of a Holder of the Series E Preferred  Stock,  to such
holder's address of record shown on the records of the Corporation,  and (ii) in
the case of the Corporation,  to the Corporation's  principal  executive offices
(currently  located  on the date of the  adoption  of these  resolutions  at the
following  address:  KMC  Telecom  Holdings,  Inc.,  1545 Route 206,  Suite 300,
Bedminster,  New  Jersey  07921) to the  attention  of the  Corporation's  Chief
Financial Officer.

XVIII.   LIMITATIONS.

                  Except as may  otherwise  be  required  by law,  the shares of
Series E Preferred  Stock shall not have any powers,  preferences  or  relative,
participating,  optional or other special  rights other than those  specifically
set forth in this  Certificate of  Designations  (as may be amended from time to
time) or otherwise in the Certificate of Incorporation of the Corporation.

XIX.     TRANSFER AND LEGENDING OF SHARES.

                  No transfer of shares of the Series E Preferred Stock shall be
effective until such transfer is registered on the books of the Corporation. Any
shares of the Series E Preferred  Stock so  transferred  must bear the following
legend:

                  THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
                  OF 1933, AS AMENDED (THE  "SECURITIES  ACT"),  NOR HAS IT BEEN
                  REGISTERED UNDER THE SECURITIES OR BLUE SKY LAWS OF ANY STATE.
                  THIS  SECURITY  MAY NOT BE  OFFERED,  SOLD,  PLEDGED OR IN ANY
                  OTHER  MANNER  TRANSFERRED  OR  DISPOSED  OF  UNLESS  (I) SUCH
                  TRANSFER  IS IN  COMPLIANCE  WITH THE  SECURITIES  ACT AND THE
                  APPLICABLE  RULES AND  REGULATIONS  THEREUNDER  AND APPLICABLE
                  STATE  SECURITIES  LAWS OR BLUE SKY LAWS AND (II) PRIOR TO ANY


                                       41
<PAGE>

                  SUCH TRANSFER,  THE  TRANSFEROR OR THE TRANSFEREE  DELIVERS AN
                  OPINION OF COUNSEL (REASONABLY  ACCEPTABLE TO THE CORPORATION)
                  TO THE TRANSFER AGENT AND THE CORPORATION,  THAT SUCH TRANSFER
                  IS IN COMPLIANCE  WITH THE  SECURITIES  ACT AND THE APPLICABLE
                  RULES AND REGULATIONS THEREUNDER.

                  The  Corporation   shall  refuse  to  register  any  attempted
transfer  of shares  of Series E  Preferred  Stock not in  compliance  with this
Article XIX.

                  In the event the shares of Series E Preferred Stock are issued
as part of a unit together with Warrants, the shares of Series E Preferred Stock
and the Warrants shall not be separately  transferable from each other until the
next Business Day after the issuance of such shares of Series E Preferred  Stock
or until such other date as may be specified in a legend to the shares of Series
E Preferred Stock.

XX.      AMENDMENTS AND WAIVERS

                  (A)  Except  as  provided  in  this  Article  XX,  any  right,
preference,  privilege or power of, or restriction  provided for the benefit of,
the Series E Preferred  Stock set forth herein may be amended and the observance
thereof may be waived (either  generally or in a particular  instance and either
retroactively or prospectively) only with the written consent of the Corporation
and the  affirmative  vote or  written  consent  of the  Holders  of at  least a
majority of the shares of Series E Preferred Stock then  outstanding  (excluding
any shares held by Affiliates of the Corporation,  any Existing  Stockholders or
any of their  Affiliates),  and any  amendment  or waiver so  effected  shall be
binding upon the Corporation and all Holders of the Series E Preferred Stock.

                  (B) Notwithstanding the foregoing, if any amendment is made to
the covenants of the Senior  Discount  Note  Indenture,  in accordance  with the
provisions therein, then a conforming amendment may be made to the covenants set
forth in Article XI of this  Certificate  of  Designations  by the  Corporation,
without the  consent of any  Holder,  and any  amendment  so  effected  shall be
binding upon the  Corporation  and all Holders of the Series E Preferred  Stock;
PROVIDED  HOWEVER,  that if in connection  with making any such amendment to the
Senior Discount Note Indenture,  the Corporation has paid  consideration  to the
holders  of the  Senior  Discount  Notes to obtain  their  consent  to make such
amendment,  then the Corporation shall pay each Holder  consideration per $1,000
liquidation  preference of Series E Preferred  Stock equal to the  consideration
per $1,000  principal amount of Senior Discount Notes paid to the holders of the
Senior Discount  Notes.  In connection with any such amendment,  the Corporation
shall deliver to the Transfer Agent an Opinion of Counsel, reasonably acceptable
to it, that such amendment complies with the terms hereof. The Corporation shall
provide  notice  in  accordance  with  Article  XVII  of  this   Certificate  of
Designations  of any  amendment  effected  pursuant to this Section XX(B) to the
Holders of the Series E Preferred Stock.


                                       42
<PAGE>

XXI.     INCREASE OF AUTHORIZED AMOUNT OF SHARES.

                  Notwithstanding  any  other  provision  herein,  the  Board of
Directors may, from time to time, in its sole discretion, increase the number of
shares of Preferred  Stock  designated as Series E Preferred Stock under Article
II of this  Certificate of  Designations,  up to the maximum amount of shares of
Preferred Stock  authorized to be issued,  without the consent of the holders of
any shares of its Capital Stock.

XXII.    ISSUANCE OF ADDITIONAL SHARES OF SERIES E PREFERRED STOCK.

                  Except  with  respect  to the  issuance  of shares of Series E
Preferred  Stock  to pay  dividends  on the  Series  E  Preferred  Stock or upon
conversion  of the  Series F  Preferred  Stock,  the  Corporation  may not issue
additional shares of the Series E Preferred Stock to any purchaser unless (A) it
has  obtained the consent of the Holders of a majority of the shares of Series E
Preferred Stock then  outstanding and the holders of a majority of the shares of
Series F Preferred Stock then outstanding or (B)(i) the per share price paid for
such  additional  shares is at least  equal to the per share  price  paid to the
Corporation  for the shares of Series E  Preferred  Stock  issued on the Closing
Date,  (ii) the  Corporation  does not issue to such purchaser more than 1,136.4
Warrants per $1,000,000 of liquidation  preference of Series E Preferred  Stock,
(iii) (a) the Holders of Series E  Preferred  Stock  issued on the Closing  Date
retain their right to receive at least 147.73 Warrants,  pursuant to Section 2.4
of the Warrant  Agreement,  per $100,000 of  liquidation  preference of Series E
Preferred  Stock  issued on the  Closing  Date and (b) the  holders  of Series F
Preferred  Stock  issued on the Closing  Date  retain  their right to receive at
least 147.73  Warrants,  pursuant to Section 2.4 of the Warrant  Agreement,  per
$100,000 of  liquidation  preference  of Series F Preferred  Stock issued on the
Closing Date and (iv) the aggregate amount of shares of Series E Preferred Stock
and Series F  Preferred  Stock  issued  (other than shares of Series E Preferred
Stock and Series F Preferred Stock issued to pay dividends  thereon or shares of
Series E Preferred Stock issued upon conversion of the Series F Preferred Stock)
shall not exceed 150,000 shares.

                  Except  with  respect  to the  issuance  of shares of Series F
Preferred  Stock  to  pay  dividends  on  the  Series  F  Preferred  Stock,  the
Corporation  shall not issue in  excess of 40,000  shares of Series F  Preferred
Stock,  unless it has  obtained  the consent of the Holders of a majority of the
shares of  Series E  Preferred  Stock  then  outstanding  and the  holders  of a
majority of the shares of Series F Preferred Stock then outstanding.


                                       43
<PAGE>

                  IN WITNESS  WHEREOF,  this Certificate has been signed on this
day of 30th April, 1999.

                                      KMC TELECOM HOLDINGS, INC.


                                             /s/   James D. Grenfell
                                      By: ------------------------------
                                          Name:    James D. Grenfell
                                          Title    Chief Financial Officer

Attested by:



- -----------------------


                                       44




             CERTIFICATE OF VOTING POWERS, DESIGNATIONS, PREFERENCES
              AND RELATIVE PARTICIPATING, OPTIONAL OR OTHER SPECIAL
                     RIGHTS AND QUALIFICATIONS, LIMITATIONS
                         AND RESTRICTIONS THEREOF OF THE
          SERIES F SENIOR REDEEMABLE, EXCHANGEABLE, PIK PREFERRED STOCK
                          OF KMC TELECOM HOLDINGS, INC.


                        _________________________________

                         Pursuant to Section 151 of the
                General Corporation Law of the State of Delaware

                        _________________________________


           As  contemplated  by Sections 141 and 242 of the General  Corporation
Law of the State of Delaware (the "DGCL"),  the  following  resolution  was duly
adopted by the Board of  Directors  of KMC Telecom  Holdings,  Inc.,  a Delaware
corporation (the  "Corporation"),  by unanimous  written consent,  dated June 1,
1999:

          WHEREAS,  pursuant to authority  conferred upon the Board of Directors
by the  Certificate  of  Incorporation,  as amended,  of said  Corporation  (the
"Certificate  of  Incorporation"),  said Board of  Directors,  at a meeting duly
called and held on  February 1, 1999,  adopted a  resolution  providing  for the
issuance   of  55,000   authorized   shares  of  Series  F  Senior   Redeemable,
Exchangeable,  PIK  Preferred  Stock (the  "Series F  Preferred  Stock"),  which
resolution is as follows:

          WHEREAS, the Board of Directors is authorized,  within the limitations
and restrictions stated in the Certificate of Incorporation,  as amended, to fix
by resolution or resolutions  the  designation of each series of preferred stock
and the powers, designations,  preferences and relative participating,  optional
or other rights,  if any, or the  qualifications,  limitations  or  restrictions
thereof,  including,  without  limiting the  generality of the  foregoing,  such
provisions  as  may  be  desired  concerning  voting,   redemption,   dividends,
dissolution  or the  distribution  of assets,  conversion or exchange,  and such
other  subjects or matters as may be fixed by resolution or  resolutions  of the
Board of Directors under the General Corporation Law of Delaware; and

          WHEREAS,  it is the desire of the Board of Directors,  pursuant to its
authority as aforesaid,  to authorize and fix the terms of a series of preferred
stock and the number of shares constituting such series;

          NOW, THEREFORE,  BE IT RESOLVED,  that there is hereby authorized such
series of preferred stock on the terms and with the provisions herein set forth:



<PAGE>
                                       2

I.   CERTAIN DEFINITIONS.

          As used herein,  the following terms shall have the following meanings
(with terms defined in the singular having comparable  meanings when used in the
plural and vice versa), unless the context otherwise requires:

          "Acquired Indebtedness" means Indebtedness of a Person existing at the
     time such Person  becomes a Restricted  Subsidiary or assumed in connection
     with an Asset Acquisition by the Corporation or a Restricted Subsidiary and
     not  Incurred  in  connection  with,  or in  anticipation  of,  such Person
     becoming a Restricted  Subsidiary or such Asset Acquisition;  PROVIDED that
     Indebtedness  of such  Person  which  is  redeemed,  defeased,  retired  or
     otherwise  repaid at the time of or immediately  upon  consummation  of the
     transactions  by which such Person becomes a Restricted  Subsidiary or upon
     consummation of such Asset Acquisition shall not be Acquired Indebtedness.

          "Adjusted   Consolidated  Net  Income"  means,  for  any  period,  the
     aggregate  net  income  (or  loss) of the  Corporation  and its  Restricted
     Subsidiaries for such period  determined in conformity with GAAP;  PROVIDED
     that  the  following   items  shall  be  excluded  in  computing   Adjusted
     Consolidated Net Income (without duplication): (i) the net income (or loss)
     of any Person that is not a Restricted  Subsidiary  (or is an  Unrestricted
     Subsidiary),  except to the  extent of the  amount  of  dividends  or other
     distributions  actually paid to the  Corporation  or any of its  Restricted
     Subsidiaries  by such  Person or an  Unrestricted  Subsidiary  during  such
     period;  (ii)  solely  for  the  purposes  of  calculating  the  amount  of
     Restricted  Payments  that may be made  pursuant to clause  (iii)(B) of the
     first  paragraph of Section  XI(B) (and in such case,  except to the extent
     includable  pursuant to clause (i) above),  the net income (or loss) of any
     Person  accrued prior to the date it becomes a Restricted  Subsidiary or is
     merged into or  consolidated  with the Corporation or any of its Restricted
     Subsidiaries or all or substantially all of the property and assets of such
     Person  are  acquired  by  the   Corporation   or  any  of  its  Restricted
     Subsidiaries;  (iii) the net  income of any  Restricted  Subsidiary  to the
     extent  that  the   declaration   or  payment  of   dividends   or  similar
     distributions  by such  Restricted  Subsidiary of such net income is not at
     the time  permitted  by the  operation  of the terms of its  charter or any
     agreement,   instrument,   judgment,   decree,   order,  statute,  rule  or
     governmental regulation applicable to such Restricted Subsidiary (except to
     the extent such  restriction  has been legally  waived);  (iv) any gains or
     losses (on an after-tax  basis)  attributable  to Asset Sales including for
     purposes  hereof the items  referred to in clauses  (b), (c) and (e) of the
     definition of "Asset Sale" or the termination of  discontinued  operations;
     (v) except for purposes of  calculating  the amount of Restricted  Payments
     that may be made  pursuant  to clause  (iii)(B) of the first  paragraph  of
     Section XI(B),  any amount paid or accrued as dividends on Preferred  Stock
     (including  the  Series  F  Preferred  Stock)  of  the  Corporation  or any
     Restricted  Subsidiary  owned by Persons other than the Corporation and any
     of  its  Restricted   Subsidiaries;   (vi)  all  extraordinary   gains  and
     extraordinary losses; (vii) the cumulative effect of a change in accounting
     principles since the High Yield Closing Date; and (viii) at the irrevocable
     election of the Corporation for each  occurrence,  any net after-tax income
     (loss) from  discontinued  operations;  PROVIDED  that for  purposes of any

<PAGE>
                                       3


     subsequent Investment in the entity conducting such discontinued operations
     pursuant to Section XI(B),  such entity shall be treated as an Unrestricted
     Subsidiary until such  discontinued  operations have actually been disposed
     of.

          "Adjusted  Consolidated Net Tangible Assets" means the total amount of
     assets of the Corporation and its Restricted  Subsidiaries (less applicable
     depreciation,  amortization  and other valuation  reserves),  except to the
     extent resulting from write-ups of capital assets  (excluding  write-ups in
     connection with accounting for acquisitions in conformity with GAAP), after
     deducting  therefrom (i) all current liabilities of the Corporation and its
     Restricted   Subsidiaries  (excluding  intercompany  items)  and  (ii)  all
     goodwill, trade names, trademarks,  patents,  unamortized debt discount and
     expense  and other like  intangibles,  all as set forth on the most  recent
     quarterly or annual  consolidated  balance sheet of the Corporation and its
     Restricted Subsidiaries, prepared in conformity with GAAP.

          "Affiliate" means, as applied to any Person, any other Person directly
     or  indirectly  controlling,  controlled  by, or under  direct or  indirect
     common  control  with,  such  Person.  For  purposes  of  this  definition,
     "control" (including,  with correlative meanings,  the terms "controlling,"
     "controlled by" and "under common control with"), as applied to any Person,
     means the  possession,  directly or  indirectly,  of the power to direct or
     cause the direction of the management and policies of such Person,  whether
     through the ownership of voting securities, by contract or otherwise.

          "Asset  Acquisition" means (i) an investment by the Corporation or any
     of its Restricted  Subsidiaries  in any other Person pursuant to which such
     Person  shall  become a  Restricted  Subsidiary  or shall be merged into or
     consolidated with the Corporation or any of its Restricted  Subsidiaries or
     (ii)  an  acquisition   by  the   Corporation  or  any  of  its  Restricted
     Subsidiaries  of the  property  and  assets of any  Person  other  than the
     Corporation  or  any  of  its  Restricted   Subsidiaries   that  constitute
     substantially all of a division or line of business of such Person.

          "Asset Sale" means any sale, transfer or other disposition  (including
     by way of  merger,  consolidation  or  sale-leaseback  transaction)  in one
     transaction or a series of related  transactions  by the Corporation or any
     of its Restricted  Subsidiaries to any Person other than the Corporation or
     any of its Restricted  Subsidiaries  of (i) all or any of the Capital Stock
     of any Restricted Subsidiary, (ii) all or substantially all of the property
     and assets of an operating  unit or business of the  Corporation  or any of
     its Restricted  Subsidiaries  or (iii) any other property and assets (other
     than the Capital Stock or other  Investment in an Unrestricted  Subsidiary)
     of  the  Corporation  or any of its  Restricted  Subsidiaries  outside  the
     ordinary   course  of  business  of  the  Corporation  or  such  Restricted
     Subsidiary  and, in each case, that is not governed by Section IX; PROVIDED
     that "Asset  Sale" shall not  include  (a) sales or other  dispositions  of
     inventory,  receivables  and  other  current  assets,  (b)  sales  or other
     dispositions of assets for  consideration at least equal to the fair market
     value  of  the  assets  sold  or  disposed  of,  to  the  extent  that  the
     consideration  received  would  constitute  property  or assets of the kind
     described in clause (i)(B) of Section  XI(F),  (c) a disposition of cash or
     Temporary Cash Investments, (d) any Restricted Payment that is permitted to
     be made, and is made, in accordance with Section XI(B),  (e) sales or other

<PAGE>
                                       4


     dispositions  of  assets  with a fair  market  value  (as  certified  in an
     Officers'  Certificate)  not in excess  of $2  million  (PROVIDED  that any
     series of related  sales or  dispositions  in excess of $2 million shall be
     considered  "Asset  Sales"),  (f)  the  lease,  assignment  of a  lease  or
     sub-lease  of any real or  personal  property  in the  ordinary  course  of
     business, (g) foreclosures on assets, (h) pledges of assets or stock by the
     Corporation or any of its Restricted Subsidiaries otherwise permitted under
     this   Certificate  of   Designations,   including  such  pledges  securing
     Indebtedness under the Newcourt Facility or under the Lucent Facility,  (i)
     the  issuance  of the  Warrants  to  Newcourt  Finance  and  Lucent  by the
     Corporation  and (j) the exercise of the  Warrants by Newcourt  Finance and
     Lucent and the  exercise of common  stock  warrants by Newcourt  Finance in
     respect of KMC Telecom, (k) the issuance of the Preferred Stock Warrants to
     First Union by the Corporation, and (l) the exercise of the Preferred Stock
     Warrants by First Union.

          "Average Life" means, at any date of determination with respect to any
     debt  security,  the  quotient  obtained  by  dividing  (i)  the sum of the
     products of (a) the number of years from such date of  determination to the
     dates of each successive  scheduled principal payment of such debt security
     and (b) the  amount of such  principal  payment by (ii) the sum of all such
     principal payments.

          "Board of Directors" means the Board of Directors of the Corporation.

          "Board  Resolution"  means a copy of a  resolution,  certified  by the
     Secretary or  Assistant  Secretary  of the  Corporation  as required by the
     context to have been duly  adopted by the Board of  Directors  and to be in
     full force and effect on the date of such  certification,  and delivered to
     the Transfer Agent.

          "Business Day" means a day other than a Saturday,  Sunday or other day
     on which  commercial  banks in New York City are  authorized or required by
     law to close.

          "Capital Stock" means, with respect to any Person, any and all shares,
     interests, participations or other equivalents (however designated, whether
     voting or non-voting) in equity of such Person,  whether outstanding on the
     Closing  Date or issued  thereafter,  including,  without  limitation,  all
     Common Stock,  Preferred  Stock  (including the Series F Preferred  Stock),
     partnership or membership  interests and any other right to receive a share
     of the  profits and losses of, or  distributions  of assets of, the issuing
     Person.

          "Capitalized  Lease" means, as applied to any Person, any lease of any
     property (whether real,  personal or mixed) of which the discounted present
     value of the rental  obligations  of such Person as lessee,  in  conformity
     with GAAP,  is required  to be  capitalized  on the  balance  sheet of such
     Person.

          "Capitalized  Lease  Obligations" means the amount of the liability in
     respect of a  Capitalized  Lease that would at such time be  required to be
     capitalized  and  reflected as a liability on a balance  sheet  prepared in
     accordance with GAAP.


<PAGE>
                                       5


          "Change  of  Control"  means  such time as (i) a  "person"  or "group"
     (within the meaning of Sections  13(d) and  14(d)(2) of the  Exchange  Act)
     becomes the ultimate "beneficial owner" (as defined in Rule 13d-3 under the
     Exchange  Act) of more than 50% of the  total  voting  power of the  Voting
     Stock of the  Corporation  on a fully  diluted  basis  and  such  ownership
     represents  a greater  percentage  of the total  voting power of the Voting
     Stock of the  Corporation,  on a fully diluted  basis,  than is held by the
     Existing  Stockholders on such date; or (ii) individuals who on the Closing
     Date  constitute  the Board of Directors  (together  with any new directors
     whose  election by the Board of Directors or whose  nomination by the Board
     of Directors for election by the Corporation's stockholders was approved by
     a vote of at least a majority of the members of the Board of Directors then
     in office who either were  members of the Board of Directors on the Closing
     Date or  whose  election  or  nomination  for  election  was so  previously
     approved)  cease for any reason to  constitute a majority of the members of
     the Board of Directors then in office.

          "Closing Date" means February 4, 1999.

          "Commission"  means the  Securities  and Exchange  Commission  and any
     successor agency having similar powers.

          "Common  Stock" means the Common Stock,  par value $.01 per share,  of
     the Corporation and any other class of common stock hereafter authorized by
     the Corporation from time to time.

          "Consolidated EBITDA" means, for any period, Adjusted Consolidated Net
     Income for such period  plus,  to the extent  such  amount was  deducted in
     calculating  such  Adjusted   Consolidated  Net  Income,  (i)  Consolidated
     Interest  Expense,  (ii) income  taxes  (other than  income  taxes  (either
     positive or negative) attributable to extraordinary and non-recurring gains
     or  losses  or  sales  of  assets),   (iii)  depreciation   expense,   (iv)
     amortization  expense and (v) all other non-cash  items  reducing  Adjusted
     Consolidated  Net Income  (other than items that will require cash payments
     and for which an  accrual  or  reserve  is, or is  required  by GAAP to be,
     made),  less all  non-cash  items  increasing  (or,  in the case of a loss,
     decreasing) Adjusted Consolidated Net Income,  determined,  with respect to
     clauses (ii),  (iii) and (iv), on a consolidated  basis for the Corporation
     and its Restricted  Subsidiaries in conformity with GAAP; PROVIDED that, if
     any  Restricted  Subsidiary  is not a Wholly Owned  Restricted  Subsidiary,
     Consolidated  EBITDA shall be reduced (to the extent not otherwise  reduced
     in  accordance  with  GAAP) by an  amount  equal to (A) the  amount  of the
     Adjusted Consolidated Net Income attributable to such Restricted Subsidiary
     multiplied by (B) the percentage  ownership  interest in the income of such
     Restricted  Subsidiary  not  owned on the last  day of such  period  by the
     Corporation or any of its Restricted Subsidiaries.

          "Consolidated  Interest Expense" means, for any period,  the aggregate
     amount  (without  duplication)  of  interest  in  respect  of  Indebtedness
     (including, without limitation,  amortization of original issue discount on
     any   Indebtedness  and  the  interest  portion  of  any  deferred  payment
     obligation,  calculated in accordance with the effective interest method of

<PAGE>
                                       6


     accounting; all commissions, discounts and other fees and charges owed with
     respect to letters of credit and  bankers'  acceptance  financing;  the net
     costs  associated with Interest Rate Agreements;  and Indebtedness  that is
     Guaranteed  or  secured  by  the  Corporation  or  any  of  its  Restricted
     Subsidiaries)  and the interest  component of Capitalized Lease Obligations
     paid,  accrued or scheduled to be paid or to be accrued by the  Corporation
     and its Restricted Subsidiaries during such period; EXCLUDING, HOWEVER, (i)
     any amount of such interest of any Restricted  Subsidiary if the net income
     of such  Restricted  Subsidiary is excluded in the  calculation of Adjusted
     Consolidated Net Income pursuant to clause (iii) of the definition  thereof
     (but  only in the same  proportion  as the net  income  of such  Restricted
     Subsidiary is excluded from the  calculation of Adjusted  Consolidated  Net
     Income  pursuant to clause  (iii) of the  definition  thereof) and (ii) any
     premiums,  fees and  expenses  (and any  amortization  thereof)  payable in
     connection with the Lucent Facility, the Newcourt Facility and the offering
     of the  Series E  Preferred  Stock,  the Series F  Preferred  Stock and the
     Senior Discount Notes,  all as determined on a consolidated  basis (without
     taking into account Unrestricted Subsidiaries) in conformity with GAAP.

          "Consolidated  Leverage  Ratio" means,  on any  Transaction  Date, the
     ratio of (i) the aggregate  amount of  Indebtedness  of the Corporation and
     its Restricted  Subsidiaries  on a consolidated  basis  outstanding on such
     Transaction  Date to (ii) the aggregate  amount of Consolidated  EBITDA for
     the then most recent four fiscal quarters for which financial statements of
     the Corporation  have been provided to the Transfer Agent (such four fiscal
     quarter period being the "Four Quarter  Period");  PROVIDED that, in making
     the foregoing calculation, PRO FONNA effect shall be given to the following
     events which occur from the  beginning of the Four Quarter  Period  through
     the Transaction  Date (the "Reference  Period"):  (i) the Incurrence of the
     Indebtedness  with respect to which the  computation  is being made and (if
     applicable)  the  application of the net proceeds  therefrom,  including to
     refinance other Indebtedness, as if such Indebtedness was incurred, and the
     application of such proceeds occurred, at the beginning of the Four Quarter
     Period;  (ii)  the  Incurrence,   repayment  or  retirement  of  any  other
     Indebtedness by the Corporation and its Restricted  Subsidiaries  since the
     first day of the Four Quarter Period as if such  Indebtedness was incurred,
     repaid or retired at the beginning of the Four Quarter Period; (iii) in the
     case  of  Acquired  Indebtedness,  the  related  acquisition,  as  if  such
     acquisition  occurred at the beginning of the Four Quarter Period; (iv) any
     acquisition  or  disposition   by  the   Corporation   and  its  Restricted
     Subsidiaries  of any  corporation  or any business or any assets out of the
     ordinary course of business,  whether by merger,  stock purchase or sale or
     asset purchase or sale or any related  repayment of  Indebtedness,  in each
     case  since  the  first  day of the  Four  Quarter  Period,  assuming  such
     acquisition  or  disposition  had been  consummated on the first day of the
     Four  Quarter  Period and after giving PRO FORMA effect to net cost savings
     that the  Corporation  reasonably  believes  in good faith  could have been
     achieved during the Four Quarter Period as a result of such  acquisition or
     disposition  (PROVIDED that both (A) such cost savings were  identified and
     quantified in an Officers'  Certificate  delivered to the Transfer Agent at
     the time of the consummation of the acquisition or disposition and (B) with
     respect to each acquisition or disposition  completed prior to the 90th day
     preceding such date of  determination,  actions were commenced or initiated
     by the  Corporation  within 90 days of such  acquisition  or disposition to

<PAGE>
                                       7


     effect such cost savings identified in such Officers'  Certificate and with
     respect to any other acquisition or disposition, such Officers' Certificate
     sets  forth the  specific  steps to be taken  within the 90 days after such
     acquisition or disposition to accomplish  such cost savings);  and PROVIDED
     FURTHER  that (x) in making such  computation,  the  Consolidated  Interest
     Expense  attributable  to  interest on any  Indebtedness  computed on a PRO
     FORMA basis and (A) bearing a floating  interest  rate shall be computed as
     if the rate in effect on the date of  computation  had been the  applicable
     rate for the  entire  period and (B) which was not  outstanding  during the
     period  for which the  computation  is being made but which  bears,  at the
     option of the  Corporation,  a fixed or floating rate of interest  shall be
     computed by applying, at the option of the Corporation, either the fixed or
     floating  rate,  and  (y) in  making  such  computation,  the  Consolidated
     Interest  Expense  of  the  Corporation  attributable  to  interest  on any
     Indebtedness  under a  revolving  credit  facility  computed on a PRO FORMA
     basis shall be computed  based upon the PRO FORMA  average daily balance of
     such Indebtedness  during the applicable  period; and (v) the occurrence of
     any of the events  described in clauses  (i)-(iv)  above by any Person that
     has become a  Restricted  Subsidiary  or has been  merged  with or into the
     Corporation or any Restricted Subsidiary during such Reference Period.

          "Consolidated   Net  Worth"  means,  at  any  date  of  determination,
     stockholders'  equity as set forth on the most recently available quarterly
     or annual consolidated  balance sheet of the Corporation and its Restricted
     Subsidiaries  (which  shall be as of a date not more than 90 days  prior to
     the  date of such  computation,  and  which  shall  not take  into  account
     Unrestricted  Subsidiaries),  less any amounts attributable to Disqualified
     Stock  or  any  equity  security   convertible  into  or  exchangeable  for
     Indebtedness,  the cost of treasury  stock and the principal  amount of any
     promissory  notes  receivable  from  the sale of the  Capital  Stock of the
     Corporation  or  any  of  its  Restricted  Subsidiaries,  each  item  to be
     determined  in  conformity  with GAAP  (excluding  the  effects  of foreign
     currency exchange  adjustments under Financial  Accounting  Standards Board
     Statement of Financial Accounting Standards No. 52).

          "Corporation"   means  KMC   Telecom   Holdings,   Inc.,   a  Delaware
     corporation.

          "Currency  Agreement"  means any foreign exchange  contract,  currency
     swap agreement or other similar agreement or arrangement.

          "Disqualified Stock" means any class or series of Capital Stock of any
     Person that by its terms or otherwise is (i) required to be redeemed  prior
     to the  Mandatory  Redemption  Date,  (ii)  redeemable at the option of the
     holder of such  class or series of  Capital  Stock at any time prior to the
     Mandatory  Redemption Date or (iii)  convertible  into or exchangeable  for
     Capital  Stock  referred  to in clause  (i) or (ii)  above or  Indebtedness
     having  a  scheduled  maturity  prior  to the  Mandatory  Redemption  Date;
     PROVIDED  that any  Capital  Stock that would not  constitute  Disqualified
     Stock  but for  provisions  thereof  giving  holders  thereof  the right to
     require  such Person to  repurchase  or redeem such  Capital  Stock (or the
     security for which such Capital Stock is convertible  into or  exchangeable
     for)  upon the  occurrence  of an  "asset  sale"  or  "change  of  control"
     occurring  prior to the  Mandatory  Redemption  Date  shall not  constitute

<PAGE>
                                       8


     Disqualified  Stock if the "asset  sale" or "change of control"  provisions
     applicable  to such  Capital  Stock (or the security for which such Capital
     Stock is convertible into or exchangeable for) are no more favorable to the
     holders of such Capital Stock (or the security for which such Capital Stock
     is convertible into or exchangeable  for) than the provisions  contained in
     Section  XI(F)  and  Article  VIII  below  and such  Capital  Stock (or the
     security for which such Capital Stock is convertible  into or  exchangeable
     for)  specifically  provides that such Person will not repurchase or redeem
     any such  stock  pursuant  to such  provision  prior  to the  Corporation's
     repurchase  of  such  Series  F  Preferred  Stock  as  are  required  to be
     repurchased pursuant to Section XI(F) and Article VIII below.

          "Dividend  Payment Date" means any Redemption Date,  January 15, April
     15,  July 15 and  October  15 and any  other  date on which  dividends  are
     payable or may be paid, as determined by the Board of Directors.

          "Dividend  Record Date" means,  with respect to each Dividend  Payment
     Date,  the close of  business  on the date set forth next to such  Dividend
     Payment Date below:

          DIVIDEND PAYMENT DATE                       DIVIDEND RECORD DATE
               January 15                                  January 1
               April 15                                    April 1
               July 15                                     July 1
               October 15                                  October 1

     or such other  record date as may be  designated  by the Board of Directors
     with  respect to dividends  payable on such other  Dividend  Payment  Date;
     PROVIDED,  HOWEVER,  that such  record date may not be more than 60 days or
     less than ten days prior to such  Dividend  Payment  Date. If any scheduled
     Dividend  Record Date is not a Business Day, then such Dividend Record Date
     shall be the Business Day  immediately  preceding such  scheduled  Dividend
     Record Date.

          "Exchange  Act" shall mean the  Securities  Exchange  Act of 1934,  as
     amended.

          "Existing  Stockholders"  means Harold N. Kamine,  his  Affiliates and
     Nassau.

          "fair  market  value"  means the price  that  would be paid in an arm'
     s-length  transaction  between an  informed  and  willing  seller  under no
     compulsion to sell and an informed and willing buyer under no compulsion to
     buy,  as  determined  in  good  faith  by the  Board  of  Directors,  whose
     determination  shall be  conclusive  if  evidenced  by a Board  Resolution;
     PROVIDED  that for  purposes  of clause  (vii) of the second  paragraph  of
     Section XI(A),  (x) the fair market value of any security  registered under
     the Exchange Act shall be the average of the closing  prices,  regular way,
     of such security for the 20 consecutive trading days immediately  preceding
     the sale of Capital Stock and (jy) in the event the  aggregate  fair market
     value of any other property (other than cash or cash equivalents)  received
     by the  Corporation  exceeds  $100  million,  the fair market value of such
     property shall be determined by a nationally  recognized investment banking
     firm or a nationally  recognized firm having expertise in the specific area

<PAGE>
                                       9


     which is the subject of such  determination  and set forth in their written
     opinion which shall be delivered to the Transfer Agent.

          "First  Union" means First Union  Investors,  Inc.,  a North  Carolina
     corporation.

          "GAAP" means generally  accepted  accounting  principles in the United
     States  of  America  as in  effect  as of  the  High  Yield  Closing  Date,
     including,  without  limitation,  those  set  forth  in  the  opinions  and
     pronouncements of the Accounting Principles Board of the American Institute
     of Certified Public  Accountants and statements and  pronouncements  of the
     Financial  Accounting  Standards Board or in such other  statements by such
     other  entity  as  approved  by a  significant  segment  of the  accounting
     profession.  All ratios and  computations  contained or referred to in this
     Certificate  of  Designations  shall be  computed in  conformity  with GAAP
     applied on a consistent  basis,  except that calculations made for purposes
     of  determining  compliance  with the terms of the covenants and with other
     provisions of this Certificate of Designations shall be made without giving
     effect to (i) the amortization of any expenses  incurred in connection with
     the Lucent  Facility,  the  Newcourt  Facility,  the offering of the Senior
     Discount  Notes,  the Series E  Preferred  Stock and the Series F Preferred
     Stock and (ii)  except  as  otherwise  provided,  the  amortization  of any
     amounts  required or permitted by Accounting  Principles Board Opinion Nos.
     16 and 17.

          "Guarantee"  means any  obligation,  contingent or  otherwise,  of any
     Person directly or indirectly  guaranteeing  any  Indebtedness of any other
     Person  and,  without  limiting  the  generality  of  the  foregoing,   any
     obligation, direct or indirect, contingent or otherwise, of such Person (i)
     to purchase or pay (or advance or supply  funds for the purchase or payment
     of) such  Indebtedness of such other Person  (whether  arising by virtue of
     partnership  arrangements,  or by  agreements  to  keep-well,  to  purchase
     assets,  goods,  securities or services (unless such purchase  arrangements
     are on  arm's-length  terms and are entered into in the ordinary  course of
     business), to take-or-pay, or to maintain financial statement conditions or
     otherwise)  or (ii)  entered  into for  purposes  of  assuring in any other
     manner  the  obligee  of such  Indebtedness  of the  payment  thereof or to
     protect such obligee against loss in respect thereof (in whole or in part);
     PROVIDED  that the term  "Guarantee"  shall not  include  endorsements  for
     collection  or  deposit  in the  ordinary  course  of  business.  The  term
     "Guarantee" used as a verb has a corresponding meaning.

          "High Yield Closing Date" means January 29, 1998.

          "Holder"  means a  registered  holder of shares of Series F  Preferred
     Stock.

          "Incur" means,  with respect to any  Indebtedness,  to incur,  create,
     issue, assume, Guarantee or otherwise become liable for or with respect to,
     or become responsible for, the payment of, contingently or otherwise,  such
     Indebtedness,  including an "Incurrence" of Acquired Indebtedness; PROVIDED
     that  neither the accrual of interest nor the  accretion of original  issue
     discount shall be considered an Incurrence of Indebtedness.


<PAGE>
                                       10


          "Indebtedness"  means,  with  respect  to any  Person  at any  date of
     determination  (without  duplication),  (i) all indebtedness of such Person
     for borrowed money, (ii) all obligations of such Person evidenced by bonds,
     debentures,  notes or other similar  instruments,  (iii) all obligations of
     such  Person in respect of letters of credit or other  similar  instruments
     (including  reimbursement  obligations with respect thereto,  but excluding
     trade letters of credit),  (iv) all  obligations  of such Person to pay the
     deferred and unpaid purchase price of property or services,  which purchase
     price is due more than six months after the date of placing  such  property
     in service or taking  delivery and title thereto or the  completion of such
     services,  except Trade Payables and accrued current liabilities arising in
     the ordinary course of business,  (v) all Capitalized  Lease Obligations of
     such Person,  (vi) all Indebtedness  referred to in clauses (i) through (v)
     hereof of other  Persons  secured  by a Lien on any  asset of such  Person,
     whether or not such  Indebtedness is assumed by such Person;  PROVIDED that
     the amount of such Indebtedness  shall be the lesser of (A) the fair market
     value of such  asset at such date of  determination  and (B) the  amount of
     such  Indebtedness,  (vii) all Indebtedness of other Persons  Guaranteed by
     such Person to the extent such  Indebtedness  is  Guaranteed by such Person
     and  (viii)  to the  extent  not  otherwise  included  in this  definition,
     obligations  under Currency  Agreements and Interest Rate  Agreements.  The
     amount of  Indebtedness  of any Person at any date shall be the outstanding
     balance  at such  date  (or,  in the case of a  revolving  credit  or other
     similar  facility,  the total  amount of funds  outstanding  on the date of
     determination)  of all  unconditional  obligations as described  above and,
     with respect to  contingent  obligations,  the maximum  liability  upon the
     occurrence of the  contingency  giving rise to the  obligation of the types
     described  above,  PROVIDED (A) that the amount  outstanding at any time of
     any Indebtedness  issued with original issue discount is the original issue
     price of such  Indebtedness,  (B) that money  borrowed and set aside at the
     time of the Incurrence of any  Indebtedness in order to prefund the payment
     of  the  interest  on  such   Indebtedness   shall  not  be  deemed  to  be
     "Indebtedness"  and (C) that  Indebtedness  shall not include any liability
     for federal, state, local or other taxes.

          "Interest  Rate   Agreement"   means  any  interest  rate   protection
     agreement,  interest rate future agreement, interest rate option agreement,
     interest rate swap  agreement,  interest rate cap agreement,  interest rate
     collar agreement,  interest rate hedge agreement, option or future contract
     or other similar agreement or arrangement.

          "Investment"  means,  with respect to any Person,  all  investments by
     such Person in other Persons in the form of any direct or indirect advance,
     loan or other extension of credit (including, without limitation, by way of
     Guarantee or similar  arrangement;  but excluding  advances to customers in
     the ordinary course of business that are, in conformity with GAAP, recorded
     as accounts  receivable  on the  balance  sheet of the  Corporation  or its
     Restricted  Subsidiaries  and  commissions,  travel and similar advances to
     officers and employees made in the ordinary  course of business) or capital
     contribution  to (by means of any  transfer  of cash or other  property  to
     others or any  payment for  property or services  for the account or use of
     others),  or any purchase or acquisition of Capital  Stock,  bonds,  notes,
     debentures  or other similar  instruments  issued by, such other Person and
     shall  include  (i)  the  designation  of a  Restricted  Subsidiary  as  an
     Unrestricted Subsidiary and (ii) the fair market value of the Capital Stock
     (or any other Investment), held by the Corporation or any of its Restricted

<PAGE>
                                       11


     Subsidiaries,  of (or in) any  Person  that has  ceased to be a  Restricted
     Subsidiary,  including,  without  limitation,  by reason of any transaction
     permitted by clause (iii) of Section  XI(D);  PROVIDED that the fair market
     value of the  Investment  remaining  in any Person  that has ceased to be a
     Restricted  Subsidiary shall not exceed the aggregate amount of Investments
     previously  made in such Person  valued at the time such  Investments  were
     made  less the net  reduction  of such  Investments.  For  purposes  of the
     definition of "Unrestricted Subsidiary" and Section XI(B), (i) "Investment"
     shall  include  the fair  market  value of the assets  (net of  liabilities
     (other  than  liabilities  to the  Corporation  or  any  of its  Restricted
     Subsidiaries))  of  any  Restricted   Subsidiary  at  the  time  that  such
     Restricted  Subsidiary is designated an Unrestricted  Subsidiary,  (ii) the
     fair market value of the assets (net of liabilities (other than liabilities
     to  the  Corporation  or  any  of  its  Restricted  Subsidiaries))  of  any
     Unrestricted  Subsidiary at the time that such  Unrestricted  Subsidiary is
     designated  a  Restricted  Subsidiary  shall  be  considered  reduction  in
     outstanding  Investments  and (iii) any property  transferred to or from an
     Unrestricted  Subsidiary  shall be valued at its fair  market  value at the
     time of such transfer.

          "Investment  Grade Securities" means (i) securities issued or directly
     and fully  guaranteed  or insured by the United  States  government  or any
     agency or instrumentality thereof, (ii) debt securities or debt instruments
     with a rating of BBB+ or higher by S&P or Baal or higher by  Moody's or the
     equivalent of such rating by such rating organization,  or, if no rating by
     S&P or Moody's  then  exists,  the  equivalent  of such rating by any other
     nationally  recognized  securities  rating  agency,  but excluding any debt
     securities  or  instruments   constituting  loans  or  advances  among  the
     Corporation  and its  Subsidiaries,  and (iii)  investment in any fund that
     invests  exclusively in investment of the type described in clauses (i) and
     (ii) which fund may also hold cash pending investment and/or distribution.

          "Junior  Securities"  has the meaning  provided in Article III hereof.
     "KMC Telecom" means KMC Telecom Inc, a Delaware  corporation.  "KMC Telecom
     II" means KMC Telecom II, Inc., a Delaware  corporation.  "KMC Telecom III"
     means KMC Telecom III, Inc., a Delaware corporation.

          "Lien" means any mortgage,  pledge,  security  interest,  encumbrance,
     lien or charge of any kind (including,  without limitation, any conditional
     sale or other title  retention  agreement or lease in the nature thereof or
     any agreement to give any security interest).

          "Lucent" means Lucent Technologies Inc., a Delaware corporation.

          "Lucent  Facility" means the vendor financing  facility between Lucent
     and  KMC  Telecom  III and KMC  Telecom  Leasing  III  LLC,  providing  for
     aggregate  borrowings  of up to $600  million  and  maturing  on the eighth
     anniversary of the closing of such credit facility.

          "Mandatory Redemption Date" means February 1, 2011.


<PAGE>
                                       12


          "Moody's" means Moody's Investors Service, Inc. and its successors.

          "Nassau" means Nassau Capital  Partners L.P., NAS Partners I L.L.C. or
     their respective successors, and their Affiliates.

          "Net Cash  Proceeds"  means (a) with  respect to any Asset  Sale,  the
     proceeds  of  such  Asset  Sale in the  form  of cash or cash  equivalents,
     including  payments  in respect of  deferred  payment  obligations  (to the
     extent corresponding to the principal, but not interest, component thereof)
     when received in the form of cash or cash equivalents (except to the extent
     such  obligations  are financed or sold with recourse to the Corporation or
     any  Restricted  Subsidiary)  and  proceeds  from the  conversion  of other
     property  received when converted to cash or cash  equivalents,  net of (i)
     brokerage  commissions and other commissions,  fees and expenses (including
     fees and expenses of counsel,  accountants and investment  bankers) related
     to such  Asset  Sale  and any  relocation  expenses  incurred  as a  result
     thereof,  (ii)  provisions  for all taxes  (whether  or not such taxes will
     actually  be paid or are  payable)  as a result of such Asset Sale  without
     regard to the consolidated results of operations of the Corporation and its
     Restricted  Subsidiaries,  taken as a whole,  (iii)  payments made to repay
     Indebtedness or any other obligation  outstanding at the time of such Asset
     Sale that either (A) is secured by a Lien on the property or assets sold or
     (B) is  required  to be paid as a result of such sale and (iv)  appropriate
     amounts to be provided by the Corporation or any Restricted Subsidiary as a
     reserve against any liabilities associated with such Asset Sale, including,
     without limitation,  pension and other post-employment benefit liabilities,
     liabilities  related to  environmental  matters and  liabilities  under any
     indemnification  obligations  associated  with  such  Asset  Sale,  all  as
     determined in conformity  with GAAP, and (b)with respect to any issuance or
     sale of Capital Stock, the proceeds of such issuance or sale in the form of
     cash or cash equivalents, including payments in respect of deferred payment
     obligations  (to  the  extent  corresponding  to  the  principal,  but  not
     interest,  component  thereof)  when  received  in the form of cash or cash
     equivalents  (except to the extent such  obligations  are  financed or sold
     with recourse to the Corporation or any Restricted Subsidiary) and proceeds
     from the  conversion of other  property  received when converted to cash or
     cash equivalents,  net of attorney's fees, accountants' fees, underwriters'
     or  placement  agents'  fees,   discounts  or  commissions  and  brokerage,
     consultant and other fees incurred in connection with such issuance or sale
     and net of taxes paid or payable as a result thereof.

          "Newcourt  Capital"  means  Newcourt  Capital  USA,  Inc.,  a Delaware
     corporation.

          "Newcourt  Facility" means the Loan and Security Agreement dated as of
     December 22, 1998 among KMC Telecom,  KMC Telecom II, and Newcourt  Finance
     and any  other  lenders  or  borrowers  from  time to time  party  thereto,
     collateral  documents,  instruments,  and agreements executed in connection
     therewith  and  any  amendments,  supplements,  modifications,  extensions,
     renewals, restatements, refinancings or refundings thereof.


<PAGE>
                                       13


          "Newcourt  Finance" means  Newcourt  Commercial  Finance  Corporation,
     formerly  known  as  AT&T  Commercial  Finance   Corporation,   a  Delaware
     corporation, and its successors.

          "Offer to  Purchase"  means an offer to  purchase  Series F  Preferred
     Stock by the Corporation from the Holders  commenced by mailing a notice to
     the Transfer Agent and each Holder  stating:  (i) the covenant  pursuant to
     which the offer is being made and that all Series F Preferred Stock validly
     tendered  will be accepted for payment on a PRO RATA basis,  together  with
     any  other  Parity   Securities   subject  to  similar  offer  to  purchase
     provisions;  (ii) the purchase price and the date of purchase  (which shall
     be a Business  Day no earlier  than 30 days nor later than 60 days from the
     date such notice is mailed) (the "Payment  Date");  (iii) that any Series F
     Preferred Stock not tendered will continue to accrue dividends  pursuant to
     its terms; (iv) that, unless the Corporation defaults in the payment of the
     purchase price,  any Series F Preferred Stock accepted for payment pursuant
     to the Offer to Purchase  shall cease to accrue  dividends on and after the
     Payment  Date;  (v) that each  Holder  electing  to have Series F Preferred
     Stock  purchased  pursuant  to the Offer to  Purchase  will be  required to
     surrender  to the  Transfer  Agent at the address  specified  in the notice
     prior to the close of business on the  Business Day  immediately  preceding
     the  payment  date such  holder's  certificate  representing  such Series F
     Preferred  Stock,  together with the form entitled "Option of the Holder to
     Elect  Purchase"  appearing  on the reverse side of such Series F Preferred
     Stock certificate completed, (vi) that Holders will be entitled to withdraw
     their  election if the Paying Agent  receives,  not later than the close of
     business on the third Business Day immediately  preceding the Payment Date,
     a telegram, facsimile transmission or letter setting forth the name of such
     Holder,  the  liquidation  preference of Series F Preferred Stock delivered
     for purchase and a statement that such Holder is  withdrawing  its election
     to have such Series F Preferred  Stock  purchased;  and (vii) that  Holders
     whose  Series F  Preferred  Stock is being  purchased  only in part will be
     issued new Series F Preferred Stock equal in liquidation  preference to the
     unpurchased  portion of the Series F Preferred  Stock  surrendered.  On the
     Payment Date,  the  Corporation  shall (i) accept for payment on a PRO RATA
     basis Series F Preferred Stock,  together with any other Parity  Securities
     subject  to similar  offer to  purchase  provisions,  or  portions  thereof
     tendered  pursuant to an Offer to  Purchase;  (ii)  deposit with the Paying
     Agent money  sufficient to pay the purchase price of all Series F Preferred
     Stock,  together with any other Parity Securities  subject to similar offer
     to purchase provisions, or portions thereof so accepted; and (iii) deliver,
     or cause to be  delivered,  to the  Transfer  Agent all Series F  Preferred
     Stock  or  portions   thereof  so  accepted   together  with  an  Officers'
     Certificate  specifying  shares of the Series F Preferred Stock or portions
     thereof  accepted  for payment by the  Corporation.  The Paying Agent shall
     promptly  mail to the  Holders  of  Series F  Preferred  Stock so  accepted
     payment in an amount equal to the purchase  price,  and the Transfer  Agent
     shall promptly authenticate and mail to such Holders new shares of Series F
     Preferred Stock equal in liquidation  preference to any unpurchased portion
     of the Series F Preferred Stock surrendered.  The Corporation will publicly
     announce the results of an Offer to Purchase as soon as  practicable  after
     the Payment Date.  The Transfer  Agent shall act as the Paying Agent for an
     Offer to Purchase.  The  Corporation  will comply with Rule 14e-1 under the
     Exchange Act and any other  securities laws and  regulations  thereunder to
     the extent such laws and regulations are applicable,  in the event that the

<PAGE>
                                       14


     Corporation is required to repurchase  Series F Preferred Stock pursuant to
     an Offer to Purchase.

          "Officer" means with respect to the  Corporation,  (i) the Chairman of
     the  Board,  the Vice  Chairman  of the  Board,  the  President,  the Chief
     Executive  Officer,  the Chief Financial  Officer or a Vice president,  and
     (ii) the  Treasurer or any  Assistant  Treasurer,  or the  Secretary or any
     Assistant Secretary of the Corporation.

          "Officers'  Certificate"  means a  certificate  signed by one  Officer
     listed in clause (i) of the  definition  thereof and one Officer  listed in
     clause (ii) of the definition  thereof;  PROVIDED,  HOWEVER,  that any such
     certificate  may be signed by any two of the Officers  listed in clause (i)
     of the definition  thereof in lieu of being signed by one Officer listed in
     clause (i) of the definition  thereof and one Officer listed in clause (ii)
     of the definition thereof.

          "Parity Securities" has the meaning specified in Article III hereof.

          "Permitted Investment" means (i) an Investment in the Corporation or a
     Restricted  Subsidiary  or a Person  which  will,  upon the  making of such
     Investment,  become a Restricted  Subsidiary  or be merged or  consolidated
     with or into or transfer or convey all or substantially  all its assets to,
     the  Corporation  or a Restricted  Subsidiary;  PROVIDED that such person's
     primary  business is related,  ancillary or complementary to the businesses
     of the  Corporation  and its  Restricted  Subsidiaries  on the date of such
     Investment;   (ii)  Temporary  Cash   Investments   and  Investment   Grade
     Securities;  (iii)  payroll,  travel and similar  advances to cover matters
     that are expected at the time of such advances  ultimately to be treated as
     expenses  in  accordance  with  GAAP  and  reasonable   advances  to  sales
     representatives;  (iv) any Investment acquired by the Corporation or any of
     its  Restricted  Subsidiaries  (x) in exchange for any other  Investment or
     accounts  receivable  held  by  the  Corporation  or  any  such  Restricted
     Subsidiary  in  connection  with or as a result of a  bankruptcy,  workout,
     reorganization or  recapitalization  of the issuer of such other Investment
     or  accounts  receivable  or  (y)  as a  result  of a  foreclosure  by  the
     Corporation  or any of its  Restricted  Subsidiaries  with  respect  to any
     secured  Investment or other  transfer of title with respect to any secured
     Investment in default; (v) any Investment acquired in consideration for the
     issuance of Junior  Securities  or the  proceeds of the  issuance of Junior
     Securities to the extent such amounts have not been previously applied to a
     Restricted Payment pursuant to clause (iii)(B)(2) of the first paragraph of
     Section  XI(B) or clause (ii) of the second  paragraph of Section  XI(B) or
     used to support the Incurrence of Indebtedness pursuant to clause (viii) in
     accordance  with  Section  XI(A)  and  Investments  acquired  as a  capital
     contribution;  (vi) Guarantees  permitted by Section XI(A);  (vii) loans or
     advances to employees of the Corporation or any Restricted  Subsidiary that
     do not in the aggregate  exceed at any one time  outstanding  $5.0 million;
     (viii)  Currency  Agreements and Interest Rate  Agreements  permitted under
     Section XI(A); (ix) Investments in prepaid expenses, negotiable instruments
     held  for  collection  and  lease,   utility  and  workers'   compensation,
     performance and other similar deposits;  (x) Investments in debt securities
     or other evidences of Indebtedness  that are issued by companies engaged in
     the  Telecommunications   Business;  PROVIDED  that  when  each  Investment

<PAGE>
                                       15


     pursuant to this clause (x) is made,  the aggregate  amount of  Investments
     outstanding  under  this  clause  (x) does not exceed  $3.0  million;  (xi)
     Strategic  Investments  and  Investments in Permitted  Joint Ventures in an
     amount not to exceed $20.0  million at any one time  outstanding;  (xii) an
     Investment  in any  Person  the  primary  business  of  which  is  related,
     ancillary  or  complementary  to the  business of the  Corporation  and its
     Subsidiaries  on the date of such  Investment in an amount not to exceed at
     any time in  respect  of all such  Investments  outstanding  the sum of (x)
     $200.0 million plus (y) 40% of the  Corporation's  Consolidated  EBITDA, if
     positive,  for the immediately  preceding four fiscal  quarters  (valued in
     each  case  as  provided  in  the  definition  of  "Investments");   (xiii)
     securities   received  in  connection   with  Asset  Sales  to  the  extent
     constituting  non-cash  consideration  permitted  under Section XI(F);  and
     (xiv)  Investments  in an amount  not to exceed  $50.0  million at any time
     outstanding.

          "Permitted  Joint  Venture" means any  Unrestricted  Subsidiary or any
     other  Person in which the  Corporation  or a Restricted  Subsidiary  owns,
     directly or  indirectly,  an  ownership  interest  (other than a Restricted
     Subsidiary)   and  whose   primary   business  is  related,   ancillary  or
     complementary  to the  businesses  of the  Corporation  and its  Restricted
     Subsidiaries at the time of determination.

          "Person"  means any  individual,  partnership,  corporation,  business
     trust,   joint   stock   company,   limited   liability   company,   trust,
     unincorporated association,  joint venture, governmental authority or other
     entity of whatever nature.

          "Preferred Stock" means any and all shares, interests,  participations
     or other  equivalents of the Corporation's  preferred stock,  including any
     such security with any priority over Common Stock with respect to dividends
     or upon liquidation or similar events.

          "Preferred Stock Warrants" means any warrants that may be issued under
     the Preferred Stock Warrant Agreement.

          "Preferred Stock Warrant Agreement" means the Warrant Agreement, dated
     as of April 30,  1999,  among the  Corporation,  First  Union and The Chase
     Manhattan Bank as warrant agent.

          "Public Equity Offering" means an underwritten primary public offering
     of Common Stock of the  Corporation  pursuant to an effective  registration
     statement under the Securities Act.

          "Purchase  Agreement" means the Securities Purchase Agreement dated as
     of February 4, 1999 among the Corporation, Newcourt Finance and Lucent.

          "Redemption  Date",  when used with  respect to any Series F Preferred
     Stock to be  redeemed,  means  the date  fixed  for such  redemption  by or
     pursuant to the terms of this Certificate of Designations.


<PAGE>
                                       16


          "Redemption  Price"  means,  with  respect  to any  share of  Series F
     Preferred  Stock, the price at which such share of Series F Preferred Stock
     is  to  be  redeemed   pursuant  to  the  terms  of  this   Certificate  of
     Designations.

          "Restricted  Subsidiary" means any Subsidiary of the Corporation other
     than an Unrestricted Subsidiary.

          "Securities  Act" means the  Securities  Act of 1933,  as amended from
     time to time, or any successor statute.

          "Senior  Discount  Note  Indenture"  means the  Indenture  dated as of
     January 29, 1998  between the  Corporation  and The Chase  Manhattan  Bank,
     relating to the Senior  Discount  Notes,  as such Indenture may be amended,
     supplemented,  extended,  renewed, replaced or otherwise modified from time
     to time.

          "Senior  Discount  Notes" means the 12 1/2 % Senior Discount Notes due
     2008 issued by the Corporation under the Senior Discount Note Indenture.

          "Senior Securities" has the meaning provided in Article III hereof.

          "Shareholders  Agreement" means the Amended and Restated  Stockholders
     Agreement among KMC Telecom  Holdings,  Inc., Nassau Capital Partners L.P.,
     NAS Partners I L.L.C., Harold N. Kamine, KMC Telecommunications  L.P., AT&T
     Credit Corporation, General Electric Capital Corporation,  Corestates Bank,
     N.A.  and  Corestates  Holdings,  Inc.,  dated as of October 31,  1997,  as
     amended by Amendment No.1,  dated as of January 7, 1998, to the Amended and
     Restated  Stockholders  Agreement,  dated as of October 31, 1997, Amendment
     No.  2,  dated  as of  January  26,  1998,  to  the  Amended  and  Restated
     Stockholders  Agreement,  dated as of October 31,  1997,  Amendment  No. 3,
     dated as of February  25, 1998,  to the Amended and  Restated  Stockholders
     Agreement,  dated as of  October  31,  1997,  Amendment  No. 4, dated as of
     February 4, 1999, to the Amended and Restated Stockholders Agreement, dated
     as of October 31, 1997, Amendment No. 5, dated as of April 30, 1999, to the
     Amended and Restated Stockholders Agreement, dated as of October 31, 1997.

          "Significant  Subsidiary"  means,  any  Subsidiary  that  would  be  a
     "significant   subsidiary"  as  defined  in  17  CFR  Part  210.   1-01(w),
     promulgated pursuant to the Securities Act, as such regulation is in effect
     on the date hereof.

          "S&P" means Standard & Poor's Ratings  Services,  a Division of McGraw
     Hill, Inc., and its successors.

          "Stated  Maturity"  means (i) with respect to any debt  security,  the
     date  specified in such debt  security as the fixed date on which the final
     installment  of principal of such debt security is due and payable and (ii)
     with respect to any  scheduled  installment  of principal of or interest on
     any debt  security,  the date  specified in such debt security as the fixed
     date on which such installment is due and payable.


<PAGE>
                                       17


          "Strategic  Investments"  means  (a)  Investments  that  the  Board of
     Directors has  determined in good faith will enable the  Corporation or any
     of its Restricted  Subsidiaries to obtain additional business that it might
     not be able to obtain without making such Investment and (b) Investments in
     entities  the  principal  function  of which  is to  perform  research  and
     development  with  respect to  products  and  services  that may be used or
     useful in the Telecommunications Business; PROVIDED that the Corporation or
     one of its  Restricted  Subsidiaries  is entitled or  otherwise  reasonably
     expected to obtain  rights to such products or services as a result of such
     Investment.

          "Strategic  Subordinated   Indebtedness"  means  Indebtedness  of  the
     Corporation  Incurred to finance the acquisition of a Person engaged in the
     Telecommunications  Business  that by its  terms,  or by the  terms  of any
     agreement or instrument pursuant to which such Indebtedness is outstanding,
     (i) is  expressly  made  subordinate  in right  of  payment  to the  Senior
     Discount  Notes and (ii) provides that no payment of principal,  premium or
     interest on, or any other payment with respect to, such Indebtedness may be
     made prior to the payment in full of all of the  Corporation's  obligations
     under the Series F Preferred Stock and the Senior Discount Notes;  PROVIDED
     that such  Indebtedness  may provide for and be repaid at any time from the
     proceeds of the sale of Capital  Stock (other than  Disqualified  Stock) of
     the Corporation after the Incurrence of such Indebtedness.

          "Subsidiary"  means, with respect to any Person,  (i) any corporation,
     association,  or other business  entity (other than a partnership) of which
     more than 50% of the total voting power of shares of Capital Stock entitled
     (without  regard  to the  occurrence  of any  contingency)  to  vote in the
     election  of  directors,  managers  or  trustees  thereof is at the time of
     determination owned or controlled,  directly or indirectly,  by such Person
     or one or more of the other  Subsidiaries  of such Person or a  combination
     thereof and (ii) any partnership,  joint venture, limited liability company
     or  similar  entity  of which (x) more  than 50% of the  capital  accounts,
     distribution  rights,  total  equity  and  voting  interests  or general or
     limited  partnership  interests,  as  applicable,  are owned or controlled,
     directly  or  indirectly,  by  such  Person  or one or  more  of the  other
     Subsidiaries of such Person or a combination thereof whether in the form of
     membership,  general,  special or limited  partnership or otherwise and (y)
     such Person or any Wholly Owned  Restricted  Subsidiary of such Person is a
     general partner or otherwise controls such entity.

          "Telecommunications  Business"  means the  development,  ownership  or
     operation  of one or  more  telephone,  telecommunications  or  information
     systems or the provision of telephony,  telecommunications  or  information
     services  (including,  without  limitation,  any voice, video transmission,
     data or Internet  services)  and any related,  ancillary  or  complementary
     business.

          "Temporary  Cash  Investment"  means any of the following:  (i) direct
     obligations  of the  United  States of  America  or any  agency  thereof or
     obligations  fully and  unconditionally  guaranteed by the United States of
     America  or any  agency  or  instrumentality  thereof,  (ii)  time  deposit
     accounts,  certificates  of deposit,  eurodollar  time  deposits  and money

<PAGE>
                                       18


     market deposits maturing within 180 days or less of the date of acquisition
     thereof issued by a bank or trust company which is organized under the laws
     of the United States of America,  any state thereof or any foreign  country
     recognized by the United States of America, and which bank or trust company
     has capital,  surplus and undivided  profits  aggregating  in excess of $50
     million (or the foreign  currency  equivalent  thereof) and has outstanding
     debt which is rated "A" (or such similar equivalent rating) or higher by at
     least one nationally recognized statistical rating organization (as defined
     in Rule 436 under the Securities Act) or any money-market fund sponsored by
     a registered  broker dealer or mutual fund  distributor,  (iii)  repurchase
     obligations with a term of not more than 30 days for underlying  securities
     of the types  described  in clauses (i) and (ii) above  entered into with a
     bank  meeting the  qualifications  described  in clause  (ii)  above,  (iv)
     commercial  paper,  maturing  not  more  than 90  days  after  the  date of
     acquisition,  issued  by a  corporation  (other  than an  Affiliate  of the
     Corporation) organized and in existence under the laws of the United States
     of America,  any state  thereof or any foreign  country  recognized  by the
     United  States  of  America  with a  rating  at the  time as of  which  any
     investment  therein is made of "P-1" (or  higher)  according  to Moody's or
     "A-1" (or higher)  according to S&P, (v) securities  with maturities of six
     months  or  less  from  the  date  of  acquisition   issued  or  fully  and
     unconditionally  guaranteed by any state,  commonwealth or territory of the
     United  States  of  America,  or by any  political  subdivision  or  taxing
     authority  thereof,  and  rated at least  "A" by S&P or  Moody's,  and (vi)
     investment  funds  investing  95% of their assets in securities of the type
     described in clauses (i)-(v) above.

          "Trade  Payables"  means,  with  respect to any Person,  any  accounts
     payable or any other indebtedness or monetary obligation to trade creditors
     created,  assumed or Guaranteed  by such Person or any of its  Subsidiaries
     arising  in  the  ordinary  course  of  business  in  connection  with  the
     acquisition of goods or services.

          "Transaction  Date"  means,  with  respect  to the  Incurrence  of any
     Indebtedness by the Corporation or any of its Restricted Subsidiaries,  the
     date  such  Indebtedness  is  to be  Incurred  and,  with  respect  to  any
     Restricted Payment, the date such Restricted Payment is to be made.

          "Transfer Agent" means Chase Mellon Shareholder Services, L.L.C.

          "Unrestricted  Subsidiary" means (i) any Subsidiary of the Corporation
     that at the time of  determination  shall  be  designated  an  Unrestricted
     Subsidiary by the Board of Directors in the manner provided below; and (ii)
     any Subsidiary of an  Unrestricted  Subsidiary.  The Board of Directors may
     designate any Restricted  Subsidiary (including any newly acquired or newly
     formed  Subsidiary of the  Corporation)  to be an  Unrestricted  Subsidiary
     unless such Subsidiary owns any Capital Stock of, or owns or holds any Lien
     on any property of, the Corporation or any Restricted Subsidiary;  PROVIDED
     that (A) any Guarantee by the  Corporation or any Restricted  Subsidiary of
     any  Indebtedness of the Subsidiary  being so designated shall be deemed an
     "Incurrence" of such Indebtedness and an "Investment" by the Corporation or
     such  Restricted  Subsidiary  (or both, if  applicable) at the time of such
     designation;  (B) either (I) the  Subsidiary to be so designated  has total

<PAGE>
                                       19


     assets of $1,000 or less or (II) if such Subsidiary has assets greater than
     $1,000,  such  designation  would be permitted in  accordance  with Section
     XI(B);  and (C) if  applicable,  the  Incurrence  of  Indebtedness  and the
     Investment  referred to in clause (A) of this proviso would be permitted in
     accordance with Section XI(A) and Section XI(B). The Board of Directors may
     designate  any  Unrestricted  Subsidiary  to  be a  Restricted  Subsidiary;
     PROVIDED that all Indebtedness of such Unrestricted  Subsidiary outstanding
     immediately  after such  designation  would, if Incurred at such time, have
     been  permitted to be Incurred (and shall be deemed to have been  Incurred)
     for all purposes of this Certificate of Designations.  Any such designation
     by the Board of  Directors  shall be  evidenced  to the  Transfer  Agent by
     promptly  filing  with the  Transfer  Agent a copy of the Board  Resolution
     giving effect to such designation and an Officers'  Certificate  certifying
     that such designation complied with the foregoing provisions.

          "Voting Stock" means, with respect to any Person, Capital Stock of any
     class or kind  ordinarily  having  the  power to vote for the  election  of
     directors,  managers or other voting  members of the governing body of such
     Person.

          "Warrant  Agreement"  means the warrant  agreement,  dated the Closing
     Date, among the Corporation,  Newcourt  Finance,  Lucent and any Additional
     Purchaser (as described  therein) and The Chase  Manhattan Bank, as warrant
     agent.

          "Warrants"  means any  warrants  that may be issued  under the Warrant
     Agreement.

          "Wholly  Owned" means,  with respect to any  Subsidiary of any Person,
     the  ownership  of 95 % or more of the  outstanding  Capital  Stock of such
     Subsidiary  (other than any director's  qualifying shares or Investments by
     foreign nationals mandated by applicable law) by such Person or one or more
     Wholly Owned Subsidiaries of such Person.


II.  DESIGNATION.

          The series of Preferred Stock authorized hereunder shall be designated
as the "Series F Senior  Redeemable,  Exchangeable,  PIK Preferred Stock" and is
referred  to herein as the  "Series F  Preferred  Stock."  The  number of shares
constituting  such  series  shall  be  55,000.  The par  value  of the  Series F
Preferred Stock shall be $.01 per share of Series F Preferred Stock.  Each share
of  Series F  Preferred  Stock  purchased  from  the  Corporation  shall  have a
liquidation  preference of $1,000.  The Corporation may from time to time in its
discretion issue fractional shares of Series F Preferred Stock.


III. RANKING.

         The  Series  F  Preferred   Stock  shall,   with  respect  to  dividend
distributions and distributions upon the liquidation, winding-up and dissolution
of the  Corporation,  rank (i) senior to (A) all classes of Common  Stock of the
Corporation,  (B) each other class of Capital Stock or series of Preferred Stock
the  terms of  which  expressly  provide  that it ranks  junior  to,  and do not

<PAGE>
                                       20


expressly  provide  that it ranks  senior  to or on a parity  with the  Series F
Preferred  Stock  as  to  dividend  distributions  and  distributions  upon  the
liquidation,   winding-up   and   dissolution  of  the   Corporation,   (C)  the
Corporation's  Series  A  Cumulative   Convertible  Preferred  Stock,  Series  C
Cumulative  Convertible  Preferred  Stock,  and Series D Cumulative  Convertible
Preferred  Stock (all  securities  described  in this  clause  (i)  collectively
referred  to as  "Junior  Securities");  (ii) on a parity  with (A) any class of
Capital Stock or series of Preferred Stock the terms of which expressly  provide
that such  class or series  will rank on a parity  with the  Series F  Preferred
Stock as to  dividend  distributions  and  distributions  upon the  liquidation,
winding-up  and   dissolution  of  the  Corporation  and  (B)  Series  E  Senior
Redeemable,  Exchangeable, PIK Preferred Stock (all securities described in this
clause (ii) collectively referred to as "Parity  Securities");  and (iii) junior
to each class of Capital  Stock or series of Preferred  Stock the terms of which
expressly  provide  that such class or series  will rank  senior to the Series F
Preferred Stock as to dividend distributions and distributions upon liquidation,
winding-up,  and  dissolution or the  Corporation.  The Series F Preferred Stock
will be  subject  to the  issuance  of series of Junior  Securities  and  Parity
Securities, PROVIDED that the Corporation may not authorize, create or issue, or
increase the authorized  amount of, any new class of Parity Securities or Senior
Securities (or any class of any security  convertible  into shares of any Parity
Security or Senior  Security)  without the approval of the Holders of at least a
majority of the shares of Series F Preferred Stock then  outstanding,  voting or
consenting,  as the case may be, separately as one class,  except that,  without
the approval of Holders of the Series F Preferred  Stock,  the  Corporation  may
issue shares of Senior Securities (or any class of any security convertible into
shares of any Senior  Security)  in exchange  for, or the  proceeds of which are
used to redeem or repurchase, (1) all (but not less than all) shares of Series E
Preferred  Stock and  Series F  Preferred  Stock  then  outstanding,  or (2) the
Indebtedness of the  Corporation.  The Series E Preferred Stock and the Series F
Preferred  Stock  (together  with any other Parity  Securities)  shall also with
respect to any redemption or repurchase by the Corporation of its Capital Stock,
rank  senior to the Junior  Securities,  except as  provided in Section 3 of the
Shareholders Agreement.

IV.  DIVIDENDS.

          (A) Holders of Series F Preferred  Stock shall be entitled to receive,
when,  as and if  declared  by the  Board of  Directors,  out of  funds  legally
available  therefor,  dividends  on the Series F  Preferred  Stock at a rate per
annum equal to 14.5% of the liquidation preference per share, payable quarterly.
All dividends will be cumulative, whether or not earned or declared, accruing on
a daily basis, whether or not there are profits,  surplus or other funds legally
available  for the payment of such  dividends,  from the date of issuance of the
Series F  Preferred  Stock and will be  payable  quarterly  in  arrears  on each
Dividend  Payment Date,  commencing on April 15, 1999. On and before January 15,
2004, the Corporation may pay dividends, at its option, in cash or in additional
fully  paid and  nonassessable  shares of  Series F  Preferred  Stock  having an
aggregate  liquidation  preference equal to the amount of such dividends rounded
to the nearest  $1.00.  After January 15, 2004,  dividends must be paid in cash,
unless the Corporation's  debt securities  prohibit such payment or there are no
funds  legally  available  therefor,  in  which  case  dividends  may be paid in
additional  fully  paid and  nonassessable  shares of Series F  Preferred  Stock
having an aggregate liquidation preference equal to the amount of such dividends
rounded to the nearest $1.00.  If any dividend (or portion  thereof)  payable on
any  Dividend  Payment  Date is not  declared  or paid in full on such  Dividend

<PAGE>
                                       21


Payment  Date,  the amount of accrued  and unpaid  dividends  will accrue at the
dividend  rate on the Series F Preferred  Stock,  compounding  quarterly,  until
declared and paid in full.

          (B) No full  dividends  may be declared or paid or funds set apart for
the payment of dividends  on any Parity  Securities  for any period  unless full
cumulative dividends shall have been or contemporaneously  shall be declared and
paid in full on the Series F Preferred Stock. If full dividends are not so paid,
the Series F  Preferred  Stock shall  share  dividends  PRO RATA with the Parity
Securities.  No  dividends  may be paid or set apart for such  payment on Junior
Securities (except dividends on Junior Securities in additional shares of Junior
Securities)  and no Junior  Securities or Parity  Securities may be repurchased,
redeemed  or  otherwise  retired  nor may funds be set apart  for  payment  with
respect  thereto if full  cumulative  dividends  shall not have been paid on the
Series F Preferred Stock.

          (C) Each  dividend  paid on the  Series  F  Preferred  Stock  shall be
payable to Holders of record as their names shall  appear in the stock ledger of
the  Corporation  on the  Dividend  Record Date for such  dividend,  except that
dividends in arrears for any past Dividend Payment Date may be declared and paid
at any time without  reference to such regular  Dividend Payment Date to Holders
of record on a later dividend record date determined by the Board of Directors.


V.   LIQUIDATION PREFERENCE.

          (A) Upon any  voluntary or  involuntary  liquidation,  dissolution  or
winding-up  of the  Corporation,  holders  of Series F  Preferred  Stock will be
entitled  to be  paid,  out  of the  assets  of the  Corporation  available  for
distribution,  $1,000  per share,  plus an amount in cash  equal to accrued  and
unpaid  dividends  thereon to the date  fixed for  liquidation,  dissolution  or
winding-up (including an amount equal to a prorated dividend for the period from
the last Dividend Payment Date to the date fixed for liquidation, dissolution or
winding-up),  before any distribution is made on any Junior Securities. If, upon
any  voluntary or  involuntary  liquidation,  dissolution  or  winding-up of the
Corporation,  the amounts  payable with respect to the Series F Preferred  Stock
and all other Parity  Securities are not paid in full, the holders of the Series
F Preferred  Stock and the Parity  Securities  will share equally and ratably in
any  distribution  of  assets  of the  Corporation  in  proportion  to the  full
liquidation  preference  and  accrued  and  unpaid  dividends  to which  each is
entitled.  After payment of the full amount of the  liquidation  preferences and
accrued and unpaid dividends to which they are entitled, the holders of Series F
Preferred  Stock  will  not be  entitled  to any  further  participation  in any
distribution of assets of the Corporation.

          (B) For the purposes of this Article V only,  neither the sale, lease,
conveyance, exchange or transfer (for cash, shares of stock, securities or other
consideration)  of all or  substantially  all of the  property  or assets of the
Corporation nor the  consolidation or merger of the Corporation with or into one
or more  corporations  shall  be  deemed  to be a  liquidation,  dissolution  or
winding-up of the Corporation.


VI.  REDEMPTION.


<PAGE>
                                       22


          (A)  MANDATORY  REDEMPTION.  The  Series F  Preferred  Stock  shall be
subject to  mandatory  redemption  (subject to the legal  availability  of funds
therefor and any  contractual  or other  restrictions  with respect  thereto) in
whole on the Mandatory  Redemption Date at a Redemption Price,  payable in cash,
equal to the  liquidation  preference  thereof on the  Redemption  Date plus all
accrued and unpaid dividends thereon to the Redemption Date.

          (B) OPTIONAL REDEMPTION.  The Series F Preferred Stock may be redeemed
at any time, at the  Corporation's  option, in whole or in part, at a Redemption
Price,  payable in cash, equal to 110% of the liquidation  preference thereof on
the  Redemption  Date,  plus an amount in cash equal to all  accrued  and unpaid
dividends thereon to the Redemption Date.

          No optional  redemption may be authorized or made unless prior thereto
full  unpaid  cumulative  dividends  shall have been paid or a sum set apart for
such payment on the Series F Preferred Stock.

          (C)  PROCEDURE  FOR  REDEMPTION.  (i) Not more than sixty (60) and not
less than thirty (30) days prior to the  Redemption  Date,  written  notice (the
"Redemption  Notice") shall be given by the  Corporation by first-class  mail to
each Holder at such Holder's  address as the same appears on the stock ledger of
the Corporation;  PROVIDED, HOWEVER, that no failure to give such notice nor any
deficiency therein shall affect the validity of the procedure for the redemption
of any  shares  of Series F  Preferred  Stock to be  redeemed,  except as to the
Holders to whom the  Corporation  has failed to give such notice or except as to
the Holders whose notice was defective. The Redemption Notice shall state:

          (a) the Redemption Price;

          (b) the Redemption Date;

          (c) that the Holder is to surrender to the  Corporation,  at the place
     or  places   designated  in  such  Redemption   Notice,   its  certificates
     representing the shares of Series F Preferred Stock to be redeemed; and

          (d) the  name of any  bank or  trust  company  performing  the  duties
     referred to in Section VI(C)(iv) below.

          (ii) On or  before  the  Redemption  Date,  each  Holder  of  Series F
Preferred  Stock to be redeemed shall  surrender the certificate or certificates
representing such shares of Series F Preferred Stock to the Corporation,  in the
manner  and  at  the  place  designated  in the  Redemption  Notice,  and on the
Redemption  Date the full  Redemption  Price for such shares shall be payable in
cash to the Holder whose name appears in the stock ledger of the  Corporation as
the  owner  thereof,  and each  surrendered  certificate  shall be  returned  to
authorized but unissued shares of Preferred Stock of the Corporation.

          (iii)  Unless the  Corporation  defaults in the payment in full of the
applicable  Redemption  Price,  dividends on the Series F Preferred Stock called
for redemption  shall cease to accrue on the Redemption Date, and the Holders of

<PAGE>
                                       23


such shares shall cease to have any further  rights with respect  thereto on the
Redemption Date, other than the right to receive the Redemption Price.

          (iv) If a  Redemption  Notice  shall  have been  duly  given or if the
Corporation shall have given to the bank or trust company  hereinafter  referred
to irrevocable  authorization  promptly to give such notice, and if on or before
the Redemption  Date specified  therein the funds  necessary for such redemption
shall have been irrevocably and  indefeasibly  deposited by the Corporation with
such bank or trust  company in trust for the PRO RATA  benefit of the Holders of
the Series F Preferred Stock called for redemption,  then,  notwithstanding that
any  certificate  for  shares  so  called  for  redemption  shall  not have been
surrendered  for  cancellation,  from and  after the time of such  deposit,  all
shares so called, or to be so called pursuant to such irrevocable authorization,
for redemption  shall be deemed no longer to be outstanding  and all rights with
respect to such shares shall forthwith  cease and terminate,  excepting only the
right of the Holders  thereof to receive from such bank or trust  company at any
time after the time of such deposit the funds so  deposited,  without  interest.
Any interest accrued on such funds shall be paid to the Corporation from time to
time. Any funds so set aside or deposited,  as the case may be, and unclaimed at
the end of three years from such Redemption Date shall, to the extent  permitted
by law, be  released or repaid to the  Corporation,  after which  repayment  the
Holders of the shares to be  redeemed  shall  look only to the  Corporation  for
payment thereof.

          (v) In the event of partial  redemptions of Series F Preferred  Stock,
the shares to be redeemed will be  determined  PRO RATA or by lot, as determined
by the  Corporation,  except that the Corporation may redeem such shares held by
any holder of fewer than 100 shares without  regard to such PRO RATA  redemption
requirement.  If any Series F Preferred  Stock is to be  redeemed  in part,  the
Redemption  Notice that relates to such Series F Preferred Stock shall state the
portion of the  liquidation  preference  to be redeemed.  New shares of Series F
Preferred  Stock  having  an  aggregate  liquidation  preference  equal  to  the
unredeemed  portion  shall be  issued  in the name of the  Holder  thereof  upon
cancellation of the original Series F Preferred Stock.

          (vi)  Notwithstanding  anything  herein to the contrary,  a Redemption
Notice will be revocable if (i) it states that it is revocable and provides that
a notice  of  revocation  may be given  not less  than  five  days  prior to the
Redemption  Date by the  Corporation in accordance  with Article XVII hereof and
(ii) the Board of Directors determines that the availability of funds to pay the
Redemption  Price is subject to the closing of a financing and, at the time such
Redemption Notice is given, such closing is subject to uncertainty.


VII. VOTING RIGHTS.

          (A) The  Holders  of Series F  Preferred  Stock  shall  have no voting
rights except as set forth below and as otherwise provided by law.

          (B) (i) If and whenever (I) dividends on the Series F Preferred  Stock
are in arrears and remain unpaid with respect to four quarterly periods (whether
or not  consecutive),  (2) the  Corporation  fails to discharge  any  redemption
obligation  with  respect  to the  Series F  Preferred  Stock,  (3) a breach  or
violation  by the  Corporation  of the  provisions  of Article X occurs,  or the
Corporation  fails to exchange  Exchange  Debentures  for the Series F Preferred

<PAGE>
                                       24


Stock tendered for exchange on the exchange date, whether or not the Corporation
satisfies the conditions to permit such exchange,  (4) the Corporation  fails to
make a Change of Control Offer or cash payment with respect  thereto if required
by the  provisions of Article VIII or (5) a breach or violation of any provision
of Article IX or  Article  XI occurs  and is not  remedied  within 30 days after
notice thereof to the  Corporation by Holders of 25% or more of the  liquidation
preference  of the Series F Preferred  Stock then  outstanding  (each such event
referred to as a "Voting Rights Triggering Event"), then the number of directors
then  constituting the Board of Directors of the Corporation  shall be increased
by one director and the Holders of a majority of the then outstanding  shares of
Series F Preferred Stock,  voting as a single class,  shall be entitled to elect
one additional director at any annual meeting of shareholders or special meeting
held in place  thereof,  or at a  special  meeting  of the  Holders  of Series F
Preferred Stock called as hereinafter provided.

          (ii) Whenever a Voting Rights  Triggering  Event shall have  occurred,
voting  rights of the  Holders  of  Series F  Preferred  Stock may be  exercised
initially either at a special meeting of the Holders of Series F Preferred Stock
called as hereinafter  provided,  yr at any annual meeting of shareholders  held
for the  purpose of  electing  directors,  and  thereafter  at each such  annual
meeting or by the written  consent of the  Holders of Series F Preferred  Stock,
voting as a single class,  pursuant to the Delaware General Corporation Law. The
term of office of any such  elected  director  shall  expire at the next  annual
meeting of shareholders held for the purpose of electing directors, subject to a
new election of a director by the Holders of Series F Preferred Stock, voting as
a single class,  at each successive  annual meeting,  but such voting rights and
the term of office of any such elected director shall expire at such time as (A)
all dividends  accrued on Series F Preferred  Stock shall have been paid in full
and (B)  each  failure,  breach  or  default  referred  to in  paragraph  VII(B)
(i)(A)(2), (3), (4) and (5) above is remedied.

          (iii) At any time after a Voting  Rights  Triggering  Event shall have
occurred and such voting rights shall not already have been initially exercised,
a proper  officer of the  Corporation  may, and upon the written  request of any
Holder of Series F Preferred Stock  (addressed to the Secretary at the principal
office of the  Corporation)  shall,  call a special  meeting  of the  Holders of
Series F Preferred  Stock for the  election of a director to be elected by them,
voting as a single  class,  as herein  provided,  such call to be made by notice
similar to that provided in the Bylaws for a special meeting of the shareholders
or as required by law.

          (iv) Such meeting shall be held at the earliest  practicable date upon
the notice required for annual meetings of shareholders at the place for holding
annual  meetings of  shareholders  of the  Corporation  or, if none,  at a place
designated  by the  Secretary of the  Corporation.  If such meeting shall not be
called by a proper officer of the Corporation  within 30 days after the personal
service of such written request upon the Secretary of the Corporation, or within
30 days after mailing the same within the United  States,  by  registered  mail,
addressed to the  Secretary of the  Corporation  at its  principal  office (such
mailing  to  be  evidenced  by  the  registry   receipt  issued  by  the  postal
authorities),  then the  holders  of  record  of 10% of the  shares  of Series F
Preferred Stock then outstanding,  may designate in writing a Holder of Series F
Preferred Stock to call such meeting at the expense of the Corporation, and such
meeting may be called by such person so designated  upon the notice required for
annual  meetings  of  shareholders  and  shall be held at the  same  place as is
elsewhere  provided in this  paragraph  VII(B)(iv)  or at such other place as is
selected by such person so  designated.  Any Holder of Series F Preferred  Stock

<PAGE>
                                       25


that would be  entitled  to vote at any such  meeting  shall have  access to the
stock  books  of the  Corporation  for the  purpose  of  causing  a  meeting  of
shareholders  to be  called  pursuant  to  the  provisions  of  this  paragraph.
Notwithstanding  the  provisions  of this  paragraph,  however,  no such special
meeting shall be called during a period within 90 days immediately preceding the
date fixed for the next annual meeting of shareholders.

          (v) At any meeting held for the purpose of electing directors at which
the Holders of Series F Preferred  Stock,  voting as a single class,  shall have
the right to elect a director as provided  herein,  the presence in person or by
proxy of the  Holders of a majority of the then  outstanding  shares of Series F
Preferred  Stock shall be required and be  sufficient  to constitute a quorum of
such class for the election of a director by such class.  At any such meeting or
adjournment  thereof,  (x) the  absence  of a quorum of the  Holders of Series F
Preferred  Stock  shall not prevent the  election  of  directors  other than the
director to be elected by such Holders and the absence of a quorum or quorums of
the holders of Capital Stock  entitled to elect such other  directors  shall not
prevent  the  election  of a director  to be elected by the  Holders of Series F
Preferred Stock, voting as a single class, and (y) in the absence of a quorum of
the  holders  of any  class  of  stock  entitled  to vote  for the  election  of
directors, a majority of the holders present in person or by proxy of such class
shall have the power to adjourn the meeting for the election of directors  which
the  holders of such class are  entitled  to elect,  from time to time,  without
notice (except as required by law) other than announcement at the meeting, until
a quorum shall be present.

          (vi) The term of office of the  director  elected  by the  Holders  of
Series F Preferred Stock,  pursuant to paragraph VII(B)(i) in office at any time
when the aforesaid voting rights are vested in the Holders of Series F Preferred
Stock,  shall terminate upon the election of his/her successor by the Holders of
the Series F Preferred Stock at any meeting of  shareholders  for the purpose of
electing  directors.  Upon any  termination  of the  aforesaid  voting rights in
accordance with paragraph VII(B)(ii), the term of office of the director elected
pursuant to paragraph  VII(B)(i)  then in office shall  thereupon  terminate and
upon  such  termination  the  number  of  directors  constituting  the  Board of
Directors  shall,  without further action,  be reduced by one, subject always to
the increase of the number of directors pursuant to paragraph  VII(B)(i) in case
of the  future  right of the  Holders  of  Series F  Preferred  Stock to elect a
director as provided herein.

          (vii) If the director elected  pursuant to paragraph  VII(B)(ii) shall
cease to serve as director  before  his/her  term shall  expire,  the Holders of
Series F  Preferred  Stock  then  outstanding,  voting as a single  class,  at a
special meeting called as provided  above,  may elect a successor to hold office
for the unexpired terms of the director whose place shall be vacant.


VIII.CHANGE OF CONTROL.

          Upon the occurrence of a Change of Control,  the Corporation  shall be
required (subject to any contractual and other restrictions with respect thereto
and the legal  availability of funds therefor) to make an Offer to Purchase (the
"Change  of  Control  Offer")  to each  Holder  of Series F  Preferred  Stock to
repurchase all or any part, at the Holder's  option,  of such Holder's  Series F
Preferred  Stock  at a cash  purchase  price  equal  to 101% of the  liquidation

<PAGE>
                                       26


preference  thereof,  plus an amount in cash  equal to all  accrued  and  unpaid
dividends  (including  an amount in cash  equal to a prorated  dividend  for the
period  from the  immediately  preceding  Dividend  Payment  Date to the date of
purchase) (the "Change of Control Payment"). The Change of Control Offer must be
made within 30 days following the conclusion of all change of control offers for
the Corporation's debt securities, must remain open for at least 30 and not more
than 60 days and must  comply  with the  requirements  of Rule  14e-1  under the
Exchange Act and any other  securities  laws and  regulations  thereunder to the
extent such laws and regulations are applicable.  Prior to commencing any Change
of Control Offer,  the Corporation  shall first consummate any change of control
offer to  purchase  required to be made to any holder of its  Indebtedness.  The
Corporation  shall make the Change of Control Offer within 30 days following the
consummation  of any  mandatory  offers  to  purchase  and  any  other  required
repayments of the Corporation's Indebtedness resulting from a change of control.


IX.      CONSOLIDATION. MERGER AND SALE OF ASSETS.

          The  Corporation  shall not consolidate  with,  merge with or into, or
sell, convey,  transfer,  lease or otherwise dispose of all or substantially all
of its property and assets (as an entirety or  substantially  an entirety in one
transaction  or a series of related  transactions)  to, any Person or permit any
Person to merge with or into the Corporation  unless:  (i) the Corporation shall
be the continuing  Person, or the Person (if other than the Corporation)  formed
by such  consolidation  or into which the Corporation is merged or that acquired
or leased such  property and assets of the  Corporation  shall be a  corporation
organized and validly existing under the laws of the United States of America or
any  jurisdiction  thereof and the Series F Preferred  Stock shall be  converted
into or exchanged for and shall become shares of such successor company,  having
in respect of such successor company or resulting company substantially the same
powers, preferences and relative participating, optional or other special rights
and the  qualifications,  limitations or restrictions  thereon that the Series F
Preferred  Stock had  immediately  prior to such  transaction  in respect of the
Corporation;  (ii) immediately  after giving effect to such transaction on a PRO
FORMA  basis,  (A) the  Corporation  or any Person  becoming  the  successor  or
resulting company, as the case may be, shall have a Consolidated Net Worth equal
to or greater than the  Consolidated  Net Worth of the  Corporation  immediately
prior to such  transaction  or (B) the  Corporation  or any Person  becoming the
successor or resulting  company,  as the case may be, shall have a  Consolidated
Leverage  Ratio no more than the  greater  of (I) 6:1 and (II) the  Consolidated
Leverage  Ratio  of the  Corporation  immediately  prior  to  such  transaction;
PROVIDED that this clause (ii) shall not apply to a consolidation or merger with
or into a Wholly Owned Restricted Subsidiary with a positive net worth; PROVIDED
that,  in connection  with any such merger or  consolidation,  no  consideration
(other than  Capital  Stock  (other than  Disqualified  Stock) in the  surviving
Person or the Corporation) shall be issued or distributed to the stockholders of
the  Corporation;  and (iii) the  Corporation  delivers to the Transfer Agent an
Officers'  Certificate  (attaching  the arithmetic  computations  to demonstrate
compliance  with clause (ii)) and Opinion of Counsel,  in each case stating that
such consolidation, merger or transfer complies with this provision and that all
conditions  precedent provided for herein relating to such transaction have been
complied with; PROVIDED,  HOWEVER,  that clause (ii) above does not apply if, in
the good faith determination of the Board of Directors of the Corporation, whose
determination shall be evidenced by a Board Resolution, the principal purpose of

<PAGE>
                                       27


such  transaction is to change the state of incorporation of the Corporation and
any such  transaction  shall not have as one of its  purposes the evasion of the
foregoing limitations.

X.   EXCHANGE.

          (A) The Corporation  may, at the sole option of the Board of Directors
(subject to the legal  availability  of funds  therefor),  exchange all, but not
less than all,  of the  shares of Series F  Preferred  Stock  then  outstanding,
including  any  shares  of  Series F  Preferred  Stock  issued  as  payment  for
dividends, for a new series of senior subordinated debentures of the Corporation
(the  "Exchange  Debentures")  to  be  issued  pursuant  to  an  indenture  (the
"Indenture")  qualified  under  the Trust  Indenture  Act of 1939,  as  amended,
substantially  in the form  attached as an exhibit to the Purchase  Agreement (a
copy of which  shall be  provided  to any  Holder  upon  written  request to the
Secretary  of the  Corporation),  at any time  following  the date on which such
exchange is  permitted  by the terms of the  then-existing  Indebtedness  of the
Corporation and subject to the conditions contained in paragraph X(B) below. The
Exchange  Debentures will be issued in registered form, without coupons, be duly
executed,  authenticated  as of the date on which the exchange is effective  and
dated the date of  exchange.  In the event of an  exchange,  Holders of Series F
Preferred  shall  be  entitled  to  receive  on the  date of  exchange  Exchange
Debentures  having an aggregate  principal  amount equal to (i) the total of the
liquidation preference for each share of Series F Preferred exchanged, PLUS (ii)
an amount  equal to all  accrued  but  unpaid  dividends  payable  on such share
(including  a prorated  dividend for the period from the  immediately  preceding
Dividend Payment Date to the date of exchange). In the event such exchange would
result in the  issuance of Exchange  Debentures  in a principal  amount which is
less than $1,000 or which is not an integral  multiple of $1,000 (such principal
amount less than $1,000 or the difference  between such principal amount and the
highest integral of $1,000 which is less than such principal amount, as the case
may be, is hereinafter  referred to as the "Fractional  Principal Amount"),  the
Corporation may,  subject to any restrictions in the terms of the  then-existing
Indebtedness of the  Corporation,  at the option of the Board of Directors,  pay
cash to each  Holder  of  Series F  Preferred  in lieu of  Fractional  Principal
Amounts of Exchange Debentures  otherwise issuable upon exchange of the Series F
Preferred Stock. The Person entitled to receive the Exchange Debentures issuable
upon exchange shall be treated for all purposes as the registered holder of such
Exchange  Debentures as of the date of exchange.  The  Corporation  will mail to
each Holder of Series F  Preferred  Stock  written  notice of its  intention  to
exchange no less than 20 nor more than 60 days prior to the date of exchange.

          (B) As a condition of the right of the  Corporation  to issue Exchange
Debentures  in exchange  for the Series F Preferred  Stock under  paragraph  (A)
above,  on the date of  exchange,  (A) there  shall be legally  available  funds
sufficient  therefor;  (B) a  registration  statement  relating to the  Exchange
Debentures shall have been declared  effective under the Securities Act prior to
such exchange and shall continue to be effective on the date of exchange, or the
Corporation  shall  have  obtained  a written  opinion  of its  outside  counsel
reasonably  acceptable  to  Holders  of a  majority  of the  shares  of Series F
Preferred  Stock that an exemption  from the  registration  requirements  of the
Securities  Act is  available  for such  exchange  and that upon receipt of such
Exchange  Debentures  pursuant to such an exchange made in accordance  with such
exemption,  each holder of an Exchange Debenture that is not an Affiliate of the
Corporation  will not be subject to any  restrictions  imposed by the Securities
Act upon the resale of such  Exchange  Debenture,  and such  exemption is relied

<PAGE>
                                       28


upon by the  Corporation  for such  exchange,  (C) the Indenture and the trustee
thereunder  shall have been qualified  under the Trust Indenture Act of 1939, as
amended;  (D)  immediately  after giving effect to such exchange,  no default or
event  of  default  would  exist  under  any  of  the   Corporation's   existing
Indebtedness;  and (E) the Corporation shall have delivered to the Trustee under
the  Indenture  a  written  opinion  of  counsel,  dated  the date of  exchange,
regarding the  satisfaction  of the conditions set forth in clauses (A), (B) and
(C).


XI.  COVENANTS.

          (A)  LIMITATION ON INDEBTEDNESS

          (a)  The  Corporation  shall  not,  and  will  not  permit  any of its
Restricted  Subsidiaries  to, Incur any  Indebtedness  (other than  Indebtedness
existing  on  the  Closing  Date);  PROVIDED  that  the  Corporation  may  Incur
Indebtedness if, after giving effect to the Incurrence of such  Indebtedness and
the receipt and application of the proceeds therefrom, the Consolidated Leverage
Ratio would be greater than zero and less than 6:1.

          Notwithstanding  the  foregoing,  the  Corporation  and any Restricted
Subsidiary  (except as specified below) may Incur each and all of the following:
(i) Indebtedness outstanding at any time in an aggregate principal amount not to
exceed $400 million;  (ii)  Indebtedness in existence on the Closing Date; (iii)
Indebtedness of the Corporation to a Restricted Subsidiary and Indebtedness of a
Restricted  Subsidiary  to the  Corporation  or another  Restricted  Subsidiary;
PROVIDED that such Indebtedness is made pursuant to an intercompany note and any
event which results in any such Restricted Subsidiary ceasing to be a Restricted
Subsidiary or any subsequent  transfer of such  Indebtedness  (other than to the
Corporation or another Restricted  Subsidiary) shall be deemed, in each case, to
constitute  an  Incurrence  of such  Indebtedness  not  permitted by this clause
(iii);  (iv)  Indebtedness  issued in exchange for, or the net proceeds of which
are used to  refinance  or refund,  then  outstanding  Indebtedness  (other than
Indebtedness  Incurred under clause (i),  (iii),  (v) or (ix) of this paragraph)
and any refinancings thereof in an amount not to exceed the amount so refinanced
or refunded (plus premiums, accrued interest, fees and expenses);  PROVIDED that
such  new  Indebtedness,  determined  as of the date of  Incurrence  of such new
Indebtedness,  does not mature or have a mandatory redemption or repurchase date
prior to the Stated  Maturity of the  Indebtedness to be refinanced or refunded,
and the Average Life of such new Indebtedness is at least equal to the remaining
Average Life of the Indebtedness to be refinanced or refunded;  (v) Indebtedness
(A) in respect of performance,  surety,  appeal bonds and completion  guarantees
provided in the ordinary course of business;  (B) under Currency  Agreements and
Interest Rate Agreements;  PROVIDED that such agreements (a) are designed solely
to protect the Corporation or its Restricted  Subsidiaries  against fluctuations
in foreign currency exchange rates or interest rates and (b) do not increase the
Indebtedness  of the  obligor  outstanding  at any time  (except  to the  extent
Incurred under another clause hereof) other than as a result of  fluctuations in
foreign  currency  exchange  rates  or  interest  rates  or by  reason  of fees,
indemnities and compensation payable thereunder; and (C) arising from agreements
providing  for   indemnification,   adjustment  of  purchase  price  or  similar
obligations,   or  from  Guarantees  or  letters  of  credit,  surety  bonds  or
performance  bonds  securing any  obligations  of the  Corporation or any of its
Restricted  Subsidiaries  pursuant to such agreements,  in each case Incurred in
connection with the disposition of any business, assets or Restricted Subsidiary
(other than Guarantees of Indebtedness  Incurred by any Person  acquiring all or

<PAGE>
                                       29


any portion of such business, assets or Restricted Subsidiary for the purpose of
financing  such  acquisition),  in a  principal  amount  not to exceed the gross
proceeds  actually  received by the Corporation or any Restricted  Subsidiary in
connection with such disposition;  (vi) Indebtedness of the Corporation,  to the
extent the net  proceeds  thereof are promptly (A) used to purchase the Series E
Preferred Stock and/or Series F Preferred Stock tendered in an Offer to Purchase
made as a result of a Change in Control or (B)  deposited  to defease the Senior
Discount  Notes or used to redeem all the Series E  Preferred  Stock or Series F
Preferred Stock; (vii) Indebtedness  Incurred to finance the cost (including the
cost  of   design,   development,   acquisition,   construction,   installation,
improvement,  transportation or integration) to acquire equipment,  inventory or
network assets (including  acquisitions by way of acquisitions of real property,
leasehold improvements, Capitalized Leases and acquisitions of the Capital Stock
of a Person  that  becomes a  Restricted  Subsidiary  to the  extent of the fair
market value of the  equipment,  inventory or network assets so acquired) by the
Corporation  or  a  Restricted   Subsidiary  after  the  Closing  Date;   (viii)
Indebtedness of the Corporation not to exceed, at any one time outstanding,  two
times the sum of (A) the Net Cash  Proceeds  received by the  Corporation  on or
after the Closing Date from the  issuance  and sale of its Capital  Stock (other
than  Disqualified  Stock)  to  a  Person  that  is  not  a  Subsidiary  of  the
Corporation, to the extent such Net Cash Proceeds have not been used pursuant to
clause (iii)(B)(2) of the first paragraph or clause (ii) of the second paragraph
of Section XI(B) or clause (v) of the definition of "Permitted  Investments"  to
make a  Restricted  Payment  and (B) 80% of the fair  market  value of  property
(other than cash and cash  equivalents)  received by the  Corporation  after the
Closing Date from the sale of its Capital Stock (other than Disqualified  Stock)
to a Person that is not a Subsidiary of the Corporation, to the extent such sale
of  Capital  Stock has not been used  pursuant  to  clause  (iii) of the  second
paragraph of Section  XI(B) to make a  Restricted  Payment;  PROVIDED  that such
Indebtedness  does not  mature  prior to the  Mandatory  Redemption  Date;  (ix)
Indebtedness  Incurred by the Corporation or any of its Restricted  Subsidiaries
constituting  reimbursement obligations with respect to letters of credit in the
ordinary course of business, including, without limitation, letters of credit in
respect of workers' compensation claims or self insurance, or other Indebtedness
with respect to reimbursement type obligations  regarding workers'  compensation
claims;  PROVIDED,  HOWEVER,  that upon the drawing of such letters of credit or
the Incurrence of such  Indebtedness,  such obligations are reimbursed within 30
days following such drawing or Incurrence;  (x) Indebtedness of Persons that are
acquired by the Corporation or any of its Restricted Subsidiaries or merged into
a Restricted  Subsidiary in  accordance  with the terms of this  Certificate  of
Designations;  PROVIDED that such  Indebtedness is not incurred in contemplation
of such acquisition or merger;  and PROVIDED FURTHER that after giving effect to
such  acquisition or merger,  either (x) the  Corporation  would be permitted to
incur at least $1.00 of  additional  Indebtedness  pursuant to the  Consolidated
Leverage  Ratio test set forth in the first sentence of this covenant or (y) the
Consolidated  Leverage  Ratio is lower (if greater than zero) or higher (if less
than  zero)  than  immediately  prior  to  such   acquisition;   (xi)  Strategic
Subordinated Indebtedness; and (xii) Indebtedness under the Lucent Facility.

          (b)  Notwithstanding  any other  provision of this Section XI(A),  the
maximum amount of Indebtedness  that the Corporation or a Restricted  Subsidiary
may Incur  pursuant to this  Section  XI(A) shall not be deemed to be  exceeded,
with  respect  to any  outstanding  Indebtedness  due  solely  to the  result of
fluctuations  in the exchange  rates of  currencies.  Accretion on an instrument

<PAGE>
                                       30


issued  at a  discount  will  not be  deemed  to  constitute  an  Incurrence  of
Indebtedness.

          (c) For purposes of determining any particular  amount of Indebtedness
pursuant to this Section XI(A), Guarantees, Liens or obligations with respect to
letters  of  credit   supporting   Indebtedness   otherwise   included   in  the
determination  of such particular  amount shall not be treated as  Indebtedness.
For purposes of determining  compliance  with this Section  XI(A),  in the event
that an item of Indebtedness meets the criteria of more than one of the types of
Indebtedness  described  in the  above  clauses,  the  Corporation,  in its sole
discretion,  shall classif~' such item of  Indebtedness  and only be required to
include the amount and type of such Indebtedness in one of such clauses.

          (B)  LIMITATION ON RESTRICTED PAYMENTS

          The  Corporation  shall  not,  and shall  not  permit  any  Restricted
Subsidiary to,  directly or indirectly,  (i) declare or pay any dividend or make
any  distribution  on or with respect to its Junior  Securities  (other than (x)
dividends or  distributions  payable  solely in shares of its Junior  Securities
(other  than  Disqualified  Stock) or in options,  warrants  or other  rights to
acquire  shares  of  such  Junior  Securities  and  (y) pro  rata  dividends  or
distributions  on  Common  Stock of  Restricted  Subsidiaries  held by  minority
stockholders)  held  by  Persons  other  than  the  Corporation  or  any  of its
Restricted Subsidiaries,  (ii) purchase, redeem, retire or otherwise acquire for
value any shares of Junior  Securities  of(A) the Corporation or an Unrestricted
Subsidiary  (including options,  warrants or other rights to acquire such shares
of Junior  Securities)  held by any Person or (B) a Restricted  Subsidiary other
than a Wholly Owned Restricted Subsidiary (including options,  warrants or other
rights to acquire such shares of Junior Securities) held by any Affiliate of the
Corporation (other than a Wholly Owned Restricted Subsidiary), or (iii) make any
Investment,  other than a Permitted Investment,  in any Person (such payments or
any  other   actions   described  in  clauses  (i)  through  (iii)  above  being
collectively  "Restricted Payments") if, at the time of, and after giving effect
to, the proposed  Restricted  Payment:  (A) the  Corporation  could not Incur at
least $1.00 of  Indebtedness  under the first paragraph of Section XI(A), or (B)
the aggregate  amount of all Restricted  Payments (the amount,  if other than in
cash,  to  be  determined  in  good  faith  by  the  Board  of  Directors  whose
determination  shall be  conclusive  and evidenced by a Board  Resolution)  made
after the Closing Date shall exceed the sum of(l) 50% of the aggregate amount of
the  Adjusted  Consolidated  Net Income (or, if the  Adjusted  Consolidated  Net
Income  is a  loss,  minus  100% of the  amount  of such  loss)  (determined  by
excluding  income  resulting  from  transfers of assets by the  Corporation or a
Restricted  Subsidiary to an  Unrestricted  Subsidiary)  accrued on a cumulative
basis during the period (taken as one accounting  period) beginning on the first
day of the fiscal quarter  immediately  following the Closing Date and ending on
the last day of the last fiscal quarter preceding the Transaction Date for which
reports have been provided to the Transfer  Agent plus (2) 100% of the aggregate
Net Cash Proceeds and the actual market value of marketable  securities  (on the
date the calculation  hereunder is made) received by the  Corporation  after the
Closing  Date  from the  issuance  and sale  permitted  by this  Certificate  of
Designations  of its Capital Stock (other than  Disqualified  Stock) to a Person
who is not a  Subsidiary  of the  Corporation,  including  an  issuance  or sale
permitted by this Certificate of Designations of Indebtedness of the Corporation
for cash subsequent to the Closing Date upon the conversion of such Indebtedness
into Capital Stock (other than Disqualified  Stock) of the Corporation,  or from

<PAGE>
                                       31


the  issuance  to a Person who is not a  Subsidiary  of the  Corporation  of any
options,  warrants or other rights to acquire  Capital Stock of the  Corporation
(in each case,  exclusive of any Disqualified Stock or any options,  warrants or
other rights that are redeemable at the option of the holder, or are required to
be redeemed,  prior to the Mandatory Redemption Date), and the Net Cash Proceeds
from any capital  contributions  to the Corporation  after the Closing Date from
Persons other than Subsidiaries of the Corporation,  in each case excluding such
Net Cash  Proceeds to the extent used to Incur  Indebtedness  pursuant to clause
(viii) of the second  paragraph of Section XI(A) and excluding Net Cash Proceeds
from the  issuance  of  Capital  Stock to the  extent  used to make a  Permitted
Investment in accordance  with clause (v) of such defined term, PLUS (3) amounts
received  from  Investments  (other than  Permitted  Investments)  in any Person
resulting from payments of interest on  Indebtedness,  dividends,  repayments of
loans or advances, or other transfers of assets, in each case to the Corporation
or any Restricted  Subsidiary or from the Net Cash Proceeds from the sale of any
such  Investment  (except,  in each  case,  to the  extent  any such  payment or
proceeds are included in the calculation of Adjusted  Consolidated  Net Income),
or from redesignations of Unrestricted  Subsidiaries as Restricted  Subsidiaries
(valued in each case as provided in the  definition  of  "Investments"),  not to
exceed,  in  each  case,  the  amount  of  Investments  previously  made  by the
Corporation  or  any  Restricted  Subsidiary  in  such  Person  or  Unrestricted
Subsidiary or (C) dividends on Series F Preferred Stock shall not have been paid
in full as provided in this Certificate of Designations.

          The  foregoing  provision  shall not be violated by reason of: (i) the
payment of any dividend within 60 days after the date of declaration thereof if,
at said date of  declaration,  such  payment  would  comply  with the  foregoing
paragraph;  (ii) the  redemption,  repurchase  or other  acquisition  of  Junior
Securities of the Corporation  including premium, if any, and accrued and unpaid
dividends,  with the proceeds of, or in exchange for, Junior  Securities  (other
than Disqualified Stock) of the Corporation; (iii) payments or distributions, to
dissenting stockholders pursuant to applicable law, pursuant to or in connection
with a  consolidation,  merger or transfer of assets that  complies with Article
IX; (iv) the  declaration  or payment of  dividends  on the Common  Stock of the
Corporation following a Public Equity Offering of such Common Stock, of up to 6%
per annum of the Net Cash Proceeds  received by the  Corporation  in such Public
Equity  Offering;  (v)  the  repurchase,  retirement  or  other  acquisition  or
retirement for value of any shares of Junior  Securities of the Corporation that
are not registered  under the Exchange Act and are held by any current or former
employee,  director or consultant (or their estates or the beneficiaries of such
estates) of the Corporation or any Subsidiary, not to exceed (A) in any calendar
year $2.0  million or (B) $5.0 million in the  aggregate;  (vi)  repurchases  of
Junior Securities deemed to occur upon exercise of stock options if such Capital
Stock  represents  a  portion  of the  exercise  price  of such  options;  (vii)
repurchases  of fractional  shares of Junior  Securities in connection  with the
exercise of Warrants in  accordance  with the Warrant  Agreement  and  Preferred
Stock Warrant Agreement or other warrants to purchase the  Corporation's  Common
Stock; and (viii) other Restricted Payments in an aggregate amount not to exceed
$2.0 million.

          Each Restricted Payment permitted pursuant to the preceding  paragraph
(other than the Restricted  Payment referred to in clauses (ii) or (vi) thereof,
an  exchange  of Junior  Securities  for  Junior  Securities  and an  Investment
referred to in clause (iv) thereof) shall be included in calculating whether the
conditions of clause  (iii)(B) of the first paragraph of this Section XI(B) have

<PAGE>
                                       32


been met with respect to any subsequent  Restricted  Payments.  In the event the
proceeds  of an issuance of Capital  Stock of the  Corporation  are used for the
redemption,  repurchase or other acquisition of Parity Securities,  then the Net
Cash Proceeds of such issuance shall be included in clause (iii)(B) of the first
paragraph  of this Section  XI(B) only to the extent such  proceeds are not used
for such redemption, repurchase or other acquisition of securities.

          Any  Restricted  Payments  made  other than in cash shall be valued at
fair market value. The amount of any Investment  "outstanding" at any time shall
be deemed to be equal to the amount of such  Investment  on the date made,  less
the return of capital to the  Corporation and its Restricted  Subsidiaries  with
respect to such Investment by distribution,  sale or otherwise (up to the amount
of such Investment on the date made).

     (C)  LIMITATION  ON  DIVIDEND  AND  OTHER  PAYMENT  RESTRICTIONS  AFFECTING
RESTRICTED SUBSIDIARIES

          The  Corporation  shall  not,  and shall  not  permit  any  Restricted
Subsidiary to, create or otherwise cause or suffer to exist or become  effective
any  consensual  encumbrance  or  restriction  of any kind on the ability of any
Restricted  Subsidiary  to (i) pay  dividends  or make any  other  distributions
permitted by applicable law on any Capital Stock of such  Restricted  Subsidiary
owned  by the  Corporation  or any  other  Restricted  Subsidiary,  (ii) pay any
Indebtedness owed to the Corporation or any other Restricted  Subsidiary,  (iii)
make loans or advances to the Corporation or any other Restricted  Subsidiary or
(iv)  transfer  any of its  property or assets to the  Corporation  or any other
Restricted Subsidiary.

          The  foregoing  provisions  shall not  restrict  any  encumbrances  or
restrictions:
(i) existing on the Closing Date, in the Newcourt Facility, the Lucent Facility,
this  Certificate  of  Designations  or any  other  agreements  in effect on the
Closing Date, and any extensions, refinancings, renewals or replacements of such
agreements;  PROVIDED  that  the  encumbrances  and  restrictions  in  any  such
extensions,  refinancings, renewals or replacements are no less favorable in any
material respect to the Holders than those encumbrances or restrictions that are
then in effect and that are being  extended,  refinanced,  renewed or  replaced;
(ii) existing under or by reason of applicable  law, rule,  regulation or order;
(iii)  existing  with  respect to any Person or the  property  or assets of such
Person acquired by the Corporation or any Restricted Subsidiary, existing at the
time of such  acquisition  and not  incurred  in  contemplation  thereof,  which
encumbrances or restrictions are not applicable to any Person or the property or
assets of any Person  other than such  Person or the  property or assets of such
Person so  acquired;  (iv) in the case of clause (iv) of the first  paragraph of
this Section  XI(C),  (A) that  restrict in a customary  maimer the  subletting,
assignment  or  transfer  of any  property  or asset  that is a lease,  license,
conveyance or contract or similar  property or asset,  (B) existing by virtue of
any transfer of, agreement to transfer, option or right with respect to, or Lien
on, any property or assets of the  Corporation or any Restricted  Subsidiary not
otherwise prohibited by this Certificate of Designations,  (C) arising or agreed
to in the ordinary  course of business,  not relating to any  Indebtedness,  and
that do not,  individually  or in the  aggregate,  detract  from  the  value  of
property or assets of the Corporation or any Restricted Subsidiary in any maimer
material to the  Corporation or any Restricted  Subsidiary or (D) purchase money
obligations for property acquired in the ordinary course of business that impose
restrictions  of the nature  discussed  in clause (iv) above on the  property so
acquired;  (v) with respect to the  Corporation  or a Restricted  Subsidiary and

<PAGE>
                                       33


imposed  pursuant to an  agreement  that has been  entered  into for the sale of
assets, including, without limitation, customary restrictions on the disposition
of all or substantially  all of the Capital Stock of, or property and assets of,
such Restricted  Subsidiary or the  Corporation;  (vi) contained in the terms of
any Indebtedness or any agreement pursuant to which such Indebtedness was issued
(in each case other than Indebtedness  incurred under the Newcourt  Facility) if
(A) the  encumbrance  or  restriction  applies  only in the  event of a  payment
default or a default  with  respect to a financial  covenant  contained  in such
Indebtedness or agreement,  (B) the encumbrance or restriction is not materially
more  disadvantageous  to the  Holders of the Series F  Preferred  Stock than is
customary in comparable  financings (as determined by the  Corporation)  and (C)
the  Corporation  determines that any such  encumbrance or restriction  will not
materially  affect the  Corporation's  ability to make  dividend  and  mandatory
redemption  payments on the Series F Preferred Stock; (vii) restrictions on cash
or other deposits or net worth imposed by customers under contracts entered into
in the ordinary course of business; (viii) customary provisions in joint venture
agreements and other similar  agreements  entered into in the ordinary course of
business;  and (ix) any  encumbrances or restrictions of the type referred to in
clauses  (i)-(iv)  of the  first  paragraph  of  this  covenant  imposed  by any
amendments,  modifications,   renewals,  restatements,  increases,  supplements,
refundings, replacements or refinancings of the contracts referred to in clauses
(i)  through  (viii)  above;  PROVIDED  that  such  amendments,   modifications,
restatements,  renewals,  increases,  supplements,  refundings,  replacements or
refinancings are, in the good faith judgment of the Corporation,  not materially
more  disadvantageous  to the Holders than those  contained  in the  restriction
prior  to  such  amendment,   modification,   restatement,   renewal,  increase,
supplement,  refunding,  replacement or refinancing.  Nothing  contained in this
Section XI(C) shall prevent the  Corporation or any Restricted  Subsidiary  from
restricting  the  sale  or  other  disposition  of  property  or  assets  of the
Corporation or any of its Restricted  Subsidiaries  that secure  Indebtedness of
the Corporation or any of its Restricted Subsidiaries.

     (D)  LIMITATION  ON THE  ISSUANCE AND SALE OF CAPITAL  STOCK OF  RESTRICTED
SUBSIDIARIES

          The  Corporation  shall not sell,  and shall not permit any Restricted
Subsidiary,  directly  or  indirectly,  to issue or sell,  any shares of Capital
Stock of a Restricted Subsidiary (including options, warrants or other rights to
purchase shares of such Capital Stock) except (i) to the Corporation or a Wholly
Owned Restricted  Subsidiary;  (ii) issuances of director's qualifying shares or
sales to  foreign  nationals  of shares of Capital  Stock of foreign  Restricted
Subsidiaries,  to the extent required by applicable  law; (iii) if,  immediately
after giving effect to such issuance or sale, such Restricted  Subsidiary  would
no longer  constitute a Restricted  Subsidiary and any Investment in such Person
remaining after giving effect to such issuance or sale would have been permitted
to be made in accordance with Section XI(B) if made on the date of such issuance
or sale; or (iv) issuances or sales of common stock of a Restricted  Subsidiary,
PROVIDED that the  Corporation  or any Restricted  Subsidiary  applies an amount
equal to the Net Cash Proceeds thereof in accordance with Section XI(F).

     (E)  LIMITATION ON TRANSACTIONS WITH SHAREHOLDERS AND AFFILIATES

          The  Corporation  shall  not,  and shall  not  permit  any  Restricted
Subsidiary  to,  directly  or  indirectly,  enter  into,  renew  or  extend  any
transaction  (including,  without  limitation,  the  purchase,  sale,  lease  or
exchange  of property  or assets,  or the  rendering  of any  service)  with any

<PAGE>
                                       34


Affiliate of the Corporation or any Restricted Subsidiary,  except upon fair and
reasonable  terms  no less  favorable  to the  Corporation  or  such  Restricted
Subsidiary than could be obtained,  at the time of such  transaction or, if such
transaction is pursuant to a written agreement,  at the time of the execution of
the agreement providing therefor, in a comparable arm's-length  transaction with
a Person that is not an Affiliate.

          The foregoing  limitation  does not limit,  and shall not apply to (i)
transactions  (A)  approved  by a majority of the  disinterested  members of the
Board of Directors or (B) for which the  Corporation or a Restricted  Subsidiary
delivers to the  Transfer  Agent a written  opinion of a  nationally  recognized
investment banking firm or a nationally  recognized firm having expertise in the
specific  area  which is the  subject  of such  determination  stating  that the
transaction is fair to the  Corporation  or such  Restricted  Subsidiary  from a
financial point of view; (ii) any transaction solely between the Corporation and
any of its Restricted  Subsidiaries or solely between  Restricted  Subsidiaries;
(iii) the payment of  reasonable  and  customary  regular fees to, and indemnity
provided on behalf of,  officers,  directors,  employees or  consultants  of the
Corporation  or  its  Restricted  Subsidiaries;   (iv)  any  payments  or  other
transactions  pursuant to any tax-sharing  agreement between the Corporation and
any other Person with which the Corporation  files a consolidated  tax return or
with which the Corporation is part of a consolidated group for tax purposes; (v)
any agreement as in effect as of the Closing Date or any  amendment  thereto (so
long as any such amendment is not disadvantageous to the Holders in any material
respect); (vi) the existence of, or the performance by the Corporation or any of
its  Restricted  Subsidiaries  of  its  obligations  under  the  terms  of,  any
stockholders  agreement (including any registration rights agreement or purchase
agreement related thereto) to which it is a party as of the Closing Date and any
similar  agreements  which it may  enter  into  thereafter  (so long as any such
amendment is not  disadvantageous  to the Holders in any material  respect);  or
(vii) any  Permitted  Investments  and  Restricted  Payments not  prohibited  by
Section  XI(B).  Notwithstanding  the  foregoing,  any  transaction or series of
related  transactions  covered by the first  paragraph of this Section XI(E) and
not covered by clauses (ii) through (vii) of this paragraph the aggregate amount
of which  exceeds $3.0 million in value,  must be approved or  determined  to be
fair in the manner provided for in clause (i)(A) or (B) above.

     (F)  LIMITATION ON ASSET SALES

          The  Corporation  shall  not,  and shall  not  permit  any  Restricted
Subsidiary to, consummate any Asset Sale, unless (i) the consideration  received
by the Corporation or such  Restricted  Subsidiary is at least equal to the fair
market  value of the  assets  sold or  disposed  of and (ii) at least 75% of the
consideration  received  consists of cash or  Temporary  Cash  Investments.  For
purposes  of this  covenant,  the  following  are  deemed  to be  cash:  (x) the
principal  amount or accreted value (whichever is larger) of Indebtedness of the
Corporation or any Restricted  Subsidiary  with respect to which the Corporation
or such  Restricted  Subsidiary has either (A) received a written release or (B)
been  released by operation of law, in either case,  from all  liability on such
Indebtedness in connection  with such Asset Sale and (y) securities  received by
the  Corporation  or any  Restricted  Subsidiary  from the  transferee  that are
promptly  converted by the Corporation or such Restricted  Subsidiary into cash.
In the  event  and to the  extent  that the Net Cash  Proceeds  received  by the
Corporation or any of its Restricted  Subsidiaries  from one or more Asset Sales
occurring  on or after the Closing Date in any period of 12  consecutive  months
exceed 10% of Adjusted  Consolidated  Net Tangible Assets  (determined as of the
date  closest  to  the   commencement  of  such  12-month  period  for  which  a

<PAGE>
                                       35


consolidated  balance sheet of the  Corporation  and its  Subsidiaries  has been
provided to the Transfer Agent),  then the Corporation  shall or shall cause the
relevant  Restricted  Subsidiary to (i) within 12 months after the date Net Cash
Proceeds so received exceed 10% of Adjusted Consolidated Net Tangible Assets (A)
apply an amount  equal to such  excess Net Cash  Proceeds to  permanently  repay
Indebtedness of the Corporation, repay Indebtedness of any Restricted Subsidiary
or redeem  any  Senior  Securities,  in each case owing to, or held by, a Person
other than the  Corporation or any of its Restricted  Subsidiaries or (B) invest
an equal amount,  or the amount not so applied  pursuant to clause (A) (or enter
into a definitive  agreement  committing to so invest within 12 months after the
date of such agreement),  in property or assets (other than current assets) of a
nature  or type or that are used in a  business  (or in a Person  (other  than a
natural  person) having property and assets of a nature or type, or engaged in a
business)  similar or related to the nature or type of the  property  and assets
of, or the business of, the Corporation and its Restricted Subsidiaries existing
on the date of such  investment  (as  determined  in good  faith by the Board of
Directors  whose  determination  shall be  conclusive  and  evidenced by a Board
Resolution)  and  (ii)  apply  (no  later  than the end of the  12-month  period
referred  to in clause  (i)) such  excess Net Cash  Proceeds  (to the extent not
applied  pursuant to clause (i)) as provided in the following  paragraph of this
Section  XI(F).  The amount of such  excess  Net Cash  Proceeds  required  to be
applied (or to be committed to be applied)  during such  12-month  period as set
forth in clause (i) of the preceding  sentence and not applied as so required by
the end of such period shall constitute "Excess Proceeds."

          If, as of the first day of any calendar month, the aggregate amount of
Excess Proceeds not theretofore subject to an Offer to Purchase pursuant to this
Section XI(F) totals at least $5 million,  the  Corporation  must commence,  not
later than the fifteenth  Business Day of such month, and consummate an Offer to
Purchase  from the  Holders on a pro rata basis,  and an offer to  purchase  any
outstanding Parity Securities with similar provisions  requiring the Corporation
to make an  offer to  purchase  such  securities,  in an  aggregate  liquidation
preference of Series F Preferred Stock and such Parity  Securities  equal to (A)
with  respect to the  Series F  Preferred  Stock,  the  product  of such  Excess
Proceeds  multiplied by a fraction,  the  numerator of which is the  liquidation
preference  of the  outstanding  shares of the Series F Preferred  Stock and the
denominator of which is the sum of the outstanding liquidation preference of the
Series F Preferred  Stock and such Parity  Securities  (the product  hereinafter
referred to as the "Series F Preferred Stock  Amount"),  and (B) with respect to
the  Parity  Securities,  the excess of the  Excess  Proceeds  over the Series F
Preferred  Stock Amount,  at a purchase  price equal to 100% of the  liquidation
preference  of the Series F Preferred  Stock or such Parity  Securities,  as the
case may be, on the  relevant  Payment  Date or such other date set forth in the
documentation  governing  the Parity  Securities,  plus,  in each case,  accrued
dividends  (if any) to the  Payment  Date or such  other  date set  forth in the
documentation  governing the Parity Securities.  If the aggregate purchase price
of the Preferred  Stock tendered  pursuant to the Offer to Purchase is less than
the Excess Proceeds,  the remaining will be available for use by the Corporation
for general corporate  purposes.  Upon the consummation of any Offer to Purchase
in accordance with the terms of this Certificate of Designations,  the amount of
Net Cash Proceeds from Asset Sales subject to any future Offer to Purchase shall
be deemed to be zero. Prior to commencing any Offer to Purchase, the Corporation
shall first  consummate any offer to purchase  required to be made to any Holder
of its Indebtedness.


<PAGE>
                                       36


     (G)  COMMISSION REPORTS AND REPORTS TO HOLDERS.

          While the Series F Preferred Stock is outstanding,  whether or not the
Corporation  is  then  required  to  file  reports  with  the  Commission,   the
Corporation  shall deliver for filing with the  Commission  all such reports and
other  information  as it would be  required  to file  with  the  Commission  by
Sections 13(a) or 15(d) under the Exchange Act if it were subject  thereto.  All
references  herein to reports  "filed"  with the  Commission  shall be deemed to
refer to the reports then most  recently  delivered  for filing,  whether or not
accepted by the Commission.


XII. MUTILATED OR MISSING SERIES F PREFERRED STOCK CERTIFICATES.

          If  any  of  the  Series  F  Preferred  Stock  certificates  shall  be
mutilated,  lost, stolen or destroyed,  the Corporation shall issue, in exchange
and in  substitution  for  and  upon  cancellation  of the  mutilated  Series  F
Preferred Stock  certificate,  or in lieu of and  substitution  for the Series F
Preferred Stock certificate lost, stolen or destroyed,  a new Series F Preferred
Stock  certificate of like tenor and representing an equivalent amount of shares
of Series F  Preferred  Stock,  but only upon  receipt of evidence of such loss,
theft or destruction of such Series F Preferred Stock certificate and indemnity,
if requested, satisfactory to the Corporation.


XIII.REISSUANCE; PREEMPTIVE RIGHTS

          (i)  Shares of Series F  Preferred  Stock  that have been  issued  and
reacquired in any manner,  including shares  purchased or redeemed,  shall (upon
compliance with any applicable  provisions of the laws of the State of Delaware)
have  the  status  of  authorized  and  unissued   shares  of  Preferred   Stock
undesignated  as to series and may be  redesignated  and reissued as part of any
series of Preferred Stock.

          (ii) No shares of Series F  Preferred  Stock  shall have any rights of
preemption whatsoever as to any securities of the Corporation,  or any warrants,
rights or options issued or granted with respect thereto, regardless of how such
securities  or such  warrants,  rights or options may be  designated,  issued or
granted.


XIV. BUSINESS DAY.

          If any payment or redemption  shall be required by the terms hereof to
be made on a day that is not a Business Day, such payment or redemption shall be
made on the immediately  succeeding  Business Day and no further dividends shall
accrued after the day payment was required.


XV.  HEADINGS OF SUBDIVISIONS.


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                                       37


          The headings of various  subdivisions  hereof are for  convenience  of
reference only and shall not affect the  interpretation of any of the provisions
hereof.


XVI. SEVERABILITY OF PROVISIONS.

          If any right, preference or limitation of the Series F Preferred Stock
set forth in this  Certificate of  Designations  (as may be amended from time to
time) is invalid,  unlawful or incapable of being enforced by reason of any rule
or law or public policy, all other rights, preferences and limitations set forth
in this  Certificate  of  Designations,  as amended,  which can be given  effect
without the invalid,  unlawful or unenforceable right,  preference or limitation
shall, nevertheless remain in full force and effect, and no right, preference or
limitation herein set forth shall be deemed dependent upon any other such right,
preference or limitation unless so expressed herein.


XVII.NOTICE.

          All notices,  requests,  demands, and other  communications  hereunder
shall be in writing and shall be deemed to have been duly given if  delivered by
hand or when sent by telex or telecopier  (with receipt  confirmed),  provided a
copy is also sent by express (overnight, if possible) courier,  addressed (i) in
the case of a Holder of the Series F Preferred  Stock, to such holder's  address
of record shown on the records of the  Corporation,  and (ii) in the case of the
Corporation, to the Corporation's principal executive offices (currently located
on the date of the adoption of these resolutions at the following  address:  KMC
Telecom Holdings, Inc., 1545 Route 206, Suite 300, Bedminster, New Jersey 07921)
to the attention of the Corporation's Chief Financial Officer.


XVIII.LIMITATIONS.

          Except as may  otherwise  be required  by law,  the shares of Series F
Preferred   Stock  shall  not  have  any  powers,   preferences   or   relative,
participating,  optional or other special  rights other than those  specifically
set forth in this  Certificate of  Designations  (as may be amended from time to
time) or otherwise in the Certificate of Incorporation of the Corporation.


XIX. TRANSFER AND LEGENDING OF SHARES.

          No  transfer  of  shares  of the  Series F  Preferred  Stock  shall be
effective until such transfer is registered on the books of the Corporation. Any
shares of the Series F Preferred  Stock so  transferred  must bear the following
legend:

          THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT
          OF 1933, AS AMENDED (THE  "SECURITIES  ACT"),  NOR HAS IT BEEN
          REGISTERED UNDER THE SECURITIES OR BLUE SKY LAWS OF ANY STATE.

<PAGE>
                                       38


          THIS  SECURITY  MAY NOT BE  OFFERED,  SOLD,  PLEDGED OR IN ANY
          OTHER  MANNER  TRANSFERRED  OR  DISPOSED  OF  UNLESS  (I) SUCH
          TRANSFER  IS IN  COMPLIANCE  WITH THE  SECURITIES  ACT AND THE
          APPLICABLE  RULES AND  REGULATIONS  THEREUNDER  AND APPLICABLE
          STATE  SECURITIES  LAWS OR BLUE SKY LAWS AND (II) PRIOR TO ANY
          SUCH TRANSFER,  THE  TRANSFEROR OR THE TRANSFEREE  DELIVERS AN
          OPINION OF COUNSEL (REASONABLY  ACCEPTABLE TO THE CORPORATION)
          TO THE TRANSFER AGENT AND THE CORPORATION,  THAT SUCH TRANSFER
          IS IN COMPLIANCE  WITH THE  SECURITIES  ACT AND THE APPLICABLE
          RULES AND REGULATIONS THEREUNDER.

          THE SHARES OF SERIES F  PREFERRED  STOCK  REPRESENTED  BY THIS
          CERTIFICATE ARE SUBJECT TO A COVENANT OF LUCENT  TECHNOLOGIES,
          INC. ("LUCENT") IN A SECURITIES PURCHASE AGREEMENT DATED AS OF
          FEBRUARY 4,1999 WHICH PROHIBITS LUCENT FROM  TRANSFERRING THIS
          SERIES OF  PREFERRED  STOCK PRIOR TO THE EARLIER OF (i) AUGUST
          4, 2000 OR (ii) ONE YEAR  AFTER A HIGH YIELD  OFFERING  BY KMC
          TELECOM HOLDINGS, INC. YIELDING GROSS PROCEEDS OF AT LEAST $50
          MILLION.  EXCEPT AS OTHERWISE  PROVIDED IN AMENDMENT  NO. 1 TO
          THE PREFERRED STOCK REGISTRATION  RIGHTS AGREEMENT DATED AS OF
          JUNE 1, 1999, BY AND AMONG THE COMPANY, FIRST UNION INVESTORS,
          INC., NEWCOURT FINANCE, AND LUCENT,

          The  Corporation  shall refuse to register any  attempted  transfer of
shares of Series F Preferred Stock not in compliance with this Article XIX.

          In the event the shares of Series F Preferred Stock are issued as part
of a unit together with Warrants, the shares of Series F Preferred Stock and the
Warrants  shall not be  separately  transferable  from each other until the next
Business  Day after the  issuance of such shares of Series F Preferred  Stock or
until such other date as may be  specified in a legend to the shares of Series F
Preferred Stock.


XX.  AMENDMENTS AND WAIVERS

     (A) Except as provided in this Article XX, any right, preference, privilege
or power of, or restriction  provided for the benefit of, the Series F Preferred
Stock set forth herein may be amended and the  observance  thereof may be waived
(either  generally  or in a  particular  instance  and either  retroactively  or
prospectively)  only  with  the  written  consent  of the  Corporation  and  the
affirmative vote or written consent of the Holders of at least a majority of the
shares of Series F Preferred Stock then outstanding (excluding any shares held

<PAGE>
                                       39


by  Affiliates of the  Corporation,  any Existing  Stockholders  or any of their
Affiliates),  and any amendment or waiver so effected  shall be binding upon the
Corporation and all Holders of the Series F Preferred Stock.

     (B)  Notwithstanding  the  foregoing,  if  any  amendment  is  made  to the
covenants  of the  Senior  Discount  Note  Indenture,  in  accordance  with  the
provisions therein, then a conforming amendment may be made to the covenants set
forth in Article XI of this  Certificate  of  Designations  by the  Corporation,
without the  consent of any  Holder;  and any  amendment  so  effected  shall be
binding upon the  Corporation  and all Holders of the Series F Preferred  Stock,
PROVIDED  HOWEVER,  that if in connection  with making any such amendment to the
Senior Discount Note Indenture,  the Corporation has paid  consideration  to the
holders  of the  Senior  Discount  Notes to obtain  their  consent  to make such
amendment,  then the Corporation shall pay each Holder  consideration per $1,000
liquidation  preference of Series F Preferred  Stock equal to the  consideration
per $1,000  principal amount of Senior Discount Notes paid to the holders of the
Senior Discount  Notes.  In connection with any such amendment,  the Corporation
shall deliver to the Transfer Agent an Opinion of Counsel, reasonably acceptable
to it, that such amendment complies with the terms hereof. The Corporation shall
provide  notice  in  accordance  with  Article  XVII  of  this   Certificate  of
Designations  of any  amendment  effected  pursuant to this Section XX(B) to the
Holders of the Series F Preferred Stock.


XXI. CONVERSION.

          Upon the  Business Day after the earlier of (i) the date that is sixty
days  after the date on which the  Corporation  closes an  underwritten  primary
offering of at least $200 million of its Common  Stock  pursuant to an effective
registration  statement  under the Securities Act or (ii) February 4, 2001 (such
Business Day hereinafter  referred to as, the "Conversion  Date"),  the Series F
Preferred  Stock will  automatically  convert into the right to receive Series E
Preferred  Stock  having  a  liquidation  preference  equal  to the  liquidation
preference  of the  Series F  Preferred  Stock).  Each  such  share of  Series E
Preferred  Stock  issued upon  conversion  of the Series F  Preferred  Stock and
surrender of the  certificates  representing  the Series F Preferred Stock shall
accrue  dividends as provided in the Series E Certificate of  Designations  from
the last date on which dividends were paid on the Series F Preferred Stock.

          On or after the  Conversion  Date,  each Holder  shall  surrender  the
certificate(s)  representing its shares of Series F Preferred Stock, accompanied
by transfer  instrument(s)  satisfactory  to the  Corporation  and sufficient to
transfer the Series F Preferred Stock being so converted to the Corporation free
of any  lien or  other  adverse  interest,  at any of the  offices  or  agencies
maintained  for  such  purpose  by  the  conversion   agent  designated  by  the
Corporation  (the  "Conversion  Agent")  and shall  give  written  notice to the
Corporation  that the  Holder  is  surrendering  its  certificates  of  Series F
Preferred  Stock for conversion into shares of Series E Preferred Stock pursuant
to this Article XXI of this Certificate of Designations.  The initial Conversion
Agent shall be the  Transfer  Agent.  Such notice  shall also state the name(s),
together with address(es),  in which the  certificate(s)  for shares of Series E
Preferred Stock shall be issued.  As promptly as practicable after the surrender
of such shares of Series F Preferred Stock as aforesaid,  the Corporation  shall
issue and deliver at the office of such Conversion  Agent to such Holder,  or on
such Holder's  written  order,  certificate(s)  representing  the number of full

<PAGE>
                                       40


shares of Series E Preferred  Stock  issuable upon the conversion of such shares
in accordance with the provisions  hereof.  Each  conversion  shall be deemed to
have been  effected  immediately  prior to the close of  business on the date on
which  shares  of Series F  Preferred  Stock  shall  have  been  surrendered  as
aforesaid,  and the Person(s) in whose name(s) any  certificate(s) for shares of
Series E Preferred Stock shall be issuable upon such conversion  shall be deemed
to have  become  the  holder(s)  of  record  of the  Series  E  Preferred  Stock
represented  thereby  at such  time,  unless  the  stock  transfer  books of the
Corporation  shall be closed on the date on which  shares of Series F  Preferred
Stock are so surrendered for conversion, in which event such conversion shall be
deemed to have been effected  immediately  prior to the close of business on the
next  succeeding  day on which  such  stock  transfer  books are open,  and such
person(s)  shall be deemed to have become such holder(s) of record of the Series
E Preferred Stock at the close of business on such later day.

          The  Corporation  shall at all times  reserve a  sufficient  number of
shares of Series E Preferred  Stock to be issued upon conversion of the Series F
Preferred Stock pursuant to this Article XXI.


XXII.INCREASE OF AUTHORIZED AMOUNT OF SHARES.

          Notwithstanding  any other  provision  herein,  the Board of Directors
may, from time to time, in its sole discretion, increase the number of shares of
Preferred Stock  designated as Series F Preferred Stock under Article II of this
Certificate  of  Designations,  up to the maximum  amount of shares of Preferred
Stock authorized to be issued,  without the consent of the holders of any shares
of its Capital Stock.

          The  Corporation  shall at all times  reserve a  sufficient  number of
authorized  but unissued  shares of Series F Preferred  Stock to provide for the
payment of all  dividends  that may  accrue on the shares of Series F  Preferred
Stock then outstanding in additional shares of Series F Preferred Stock.


XXIII.ISSUANCE OF ADDITIONAL SHARES OF SERIES F PREFERRED STOCK.

          Except  with  respect to the  issuance of shares of Series E Preferred
Stock to pay dividends on the Series E Preferred Stock or upon conversion of the
Series F Preferred Stock, the Corporation may not issue additional shares of the
Series E Preferred Stock to any purchaser unless (A) it has obtained the consent
of the  Holders of a majority  of the  shares of Series F  Preferred  Stock then
outstanding  and the  holders of a majority  of the shares of Series E Preferred
Stock then  outstanding  or (B)(i) the per share price paid for such  additional
shares is at least equal to the per share price paid to the  Corporation for the
shares  of  Series E  Preferred  Stock  issued  on the  Closing  Date,  (ii) the
Corporation  does not issue to such  purchaser  more than  1,136.4  Warrants per
$1,000,000 of liquidation  preference of Series E Preferred Stock, (iii) (a) the
holders of Series E  Preferred  Stock  issued on the Closing  Date retain  their
right to receive  at least  147.73  Warrants,  pursuant  to  Section  2.4 of the

<PAGE>
                                       41


Warrant Agreement,  per $100,000 of liquidation preference of Series E Preferred
Stock issued on the Closing Date and (b) the Holders of Series F Preferred Stock
issued on the  Closing  Date  retain  their  right to  receive  at least  147.73
Warrants,  pursuant  to Section 2.4 of the Warrant  Agreement,  per  $100,000 of
liquidation  preference  of Series F Preferred  Stock issued on the Closing Date
and (iv) the  aggregate  amount of all  shares of Series E  Preferred  Stock and
Series F Preferred  Stock issued (other than shares of Series E Preferred  Stock
and Series F Preferred Stock issued to pay dividends thereon or shares of Series
E Preferred Stock issued upon conversion of the Series F Preferred  Stock) shall
not exceed 150,000 shares.

          Except  with  respect to the  issuance of shares of Series F Preferred
Stock to pay dividends on the Series F Preferred  Stock,  the Corporation  shall
not issue in excess of 40,000 shares of Series F Preferred Stock,  unless it has
obtained  the  consent of the  Holders  of a majority  of the shares of Series F
Preferred Stock then  outstanding and the Holders of a majority of the shares of
Series E Preferred Stock then outstanding.

<PAGE>
                                       42


           IN WITNESS WHEREOF, this Certificate has been signed on this 1st day
of June, 1999.


                                            KMC TELECOM HOLDINGS, INC.

                                            By:   /s/ James D. Grenfell
                                               -------------------------
                                               Name:  James D. Grenfell
                                               Title: Chief Financial Officer





================================================================================
                           KMC TELECOM HOLDINGS, INC.,
                                   as Issuer,



                           KMC TELECOM FINANCING, INC.
                                  as Guarantor,


                                       and


                            THE CHASE MANHATTAN BANK,
                                   as Trustee




                          First Supplemental Indenture

                            Dated as of May 24, 1999





                     12 1/2% Senior Discount Notes due 2008


================================================================================



<PAGE>

          THIS FIRST SUPPLEMENTAL INDENTURE, dated as of May 24, 1999, among KMC
TELECOM HOLDINGS, INC., a Delaware corporation,  as issuer (the "COMPANY"),  KMC
TELECOM FINANCING,  INC., a Delaware corporation and a Restricted  Subsidiary of
the Company,  as guarantor (the  "GUARANTOR"),  and THE CHASE MANHATTAN BANK, as
trustee (the "TRUSTEE").


                             RECITALS OF THE COMPANY

          WHEREAS,  the Company and the Trustee  have  entered into that certain
indenture dated as of January 29, 1998 (the "SENIOR DISCOUNT NOTES  INDENTURE"),
pursuant to which the Company issued in the original aggregate  principal amount
at maturity of  $460,800,000 12 1/2% Senior Discount Notes due 2008 (thE "SENIOR
DISCOUNT NOtes");

          WHEREAS,  the Company  covenanted and agreed  pursuant to the terms of
the Senior Discount Notes Indenture not to permit any Restricted  Subsidiary (as
defined in the Senior  Discount Notes  Indenture),  directly or  indirectly,  to
guarantee any indebtedness of the Company which is equal or subordinate in right
of payment  with the Senior  Discount  Notes unless such  Restricted  Subsidiary
simultaneously  executes  and  delivers a  supplemental  indenture to the Senior
Discount Notes Indenture to provide for a Guarantee of the payment of the Senior
Discount Notes by such Restricted Subsidiary;

          WHEREAS, the Guarantor is a Restricted Subsidiary of the Company;

          WHEREAS,  the Company, the Guarantor and the Trustee have entered into
that  certain  indenture  dated as of the date  hereof  (as  amended,  restated,
supplemented or otherwise modified from time to time, the "INDENTURE"), pursuant
to which the Company is issuing on the date  hereof  $275,000,000  in  aggregate
principal  amount of 13 1/2% Senior Notes due 2009 (thE "NOtes") which are equal
in right of payment with the Senior Discount Notes; and

          WHEREAS,  the Notes are  guaranteed by the  Guarantor  pursuant to the
terms of the Indenture.

          NOW,  THEREFORE,  for and in  consideration  of the  premises  and the
mutual covenants and agreements hereinafter set forth, the parties hereto agree,
for the equal and  proportionate  benefit of all Holders of the Senior  Discount
Notes, as follows:


<PAGE>
                                       2


                                    ARTICLE I

                            RATIFICATION; DEFINITIONS

          SECTION 1.01. FIRST  SUPPLEMENTAL  INDENTURE.  This First Supplemental
Indenture is  supplemental  to, and is entered into in  accordance  with Section
9.01 of the Senior Discount Notes Indenture, and except as modified, amended and
supplemented by this First Supplemental Indenture,  the provisions of the Senior
Discount  Notes  Indenture are in all respects  ratified and confirmed and shall
remain in full force and effect; and

          SECTION 1.02. DEFINITIONS. Unless the context shall otherwise require,
all terms  which are  defined  in  Section  1.01 of the  Senior  Discount  Notes
Indenture shall have the same meanings, respectively, in this First Supplemental
Indenture as such terms are given in said  Section  1.01 of the Senior  Discount
Notes Indenture.


                                   ARTICLE II
                       GUARANTEE OF SENIOR DISCOUNT NOTES

          SECTION  2.01.  GUARANTEE.  (a)  Subject  to the  provisions  of  this
Supplemental  Indenture,   the  Guarantor  hereby  fully,   unconditionally  and
irrevocably guarantees  (hereinafter referred to as the "SUBSIDIARY  GUARANTEE")
to each holder of the Senior Discount Notes (each, a "HOLDER" and  collectively,
the "HOLDERS") and to the Trustee on behalf of itself and such Holders:

          (i) the due and punctual  payment of the  Accreted  Value or principal
     amount at maturity  of,  premium,  if any,  on and  interest on each Senior
     Discount Note outstanding as of the date hereof, when and as the same shall
     become due and payable,  whether at maturity, by acceleration or otherwise,
     the due and  punctual  payment of interest on the overdue  principal of and
     interest,  if any, on such Senior Discount Notes, to the extent lawful, and
     the due and punctual performance of all other obligations of the Company to
     the Holders or the Trustee, all in accordance with the terms of such Senior
     Discount Note and the Senior Discount Note Indenture; and

          (ii) in the case of any extension of time of payment or renewal of any
     such Senior Discount Note or any of such other  obligations,  that the same
     will be promptly paid in full when due or performed in accordance  with the
     terms of the extension or renewal,  at Stated Maturity,  by acceleration or
     otherwise.


<PAGE>
                                       3


          (b) The Guarantor  hereby  waives  diligence,  presentment,  demand of
payment,  filing of claims with a court in the event of merger or  bankruptcy of
the Company,  any right to require a proceeding  first against the Company,  the
benefit  of  discussion,  protest  or notice  with  respect  to any such  Senior
Discount  Note or the debt  evidenced  thereby and all demands  whatsoever,  and
covenants that this  Subsidiary  Guarantee will not be discharged as to any such
Senior  Discount  Note  except  by  payment  in full of the  Accreted  Value  or
principal  amount  at  maturity  thereof  and  interest  thereon  in the  manner
contemplated  by the  terms of the  Senior  Discount  Notes  Indenture.  For the
purposes of this First Supplemental  Indenture,  the maturity of the obligations
guaranteed  hereby may be  accelerated  as set forth  under  Article  Six of the
Senior Discount Notes Indenture  (hereinafter  referred to as "ARTICLE SIX"). In
the event of any declaration of acceleration of such  obligations as provided in
such  Article  Six,  such  obligations  (whether or not due and  payable)  shall
forthwith  become due and payable by the Guarantor for the purpose of this First
Supplemental Indenture. In addition,  without limiting the foregoing provisions,
upon the  effectiveness  of an  acceleration  under Article Six, the Trustee may
make a demand for payment on the Senior  Discount  Notes  under this  Subsidiary
Guarantee.  Notwithstanding  the  foregoing,  this  Subsidiary  Guarantee by the
Guarantor shall  automatically  terminate upon the earlier of (i) the payment in
full of the Accreted Value or principal amount at maturity of, premium,  if any,
and interest on all  outstanding  Senior Discount Notes and (ii) the termination
of the guarantee of the Notes by the Guarantor in accordance  with Section 11.01
of the Indenture,  unless such termination  under Section 11.01 of the Indenture
results from a payment by the Guarantor under the Note Guarantee. If the Trustee
or the Holder is required by any court or  otherwise to return to the Company or
the Guarantor, or any custodian, receiver, liquidator,  trustee, sequestrator or
other similar  official acting in relation to the Company or the Guarantor,  any
amount paid to the Trustee or such Holder in respect of a Senior  Discount Note,
this  Subsidiary  Guarantee,  to the  extent  theretofore  discharged,  shall be
reinstated  in full force and  effect.  The  Guarantor  further  agrees,  to the
fullest extent that it may lawfully do so, that, as between it, on the one hand,
and the  Holders  and the  Trustee,  on the  other  hand,  the  maturity  of the
obligations  guaranteed hereby may be accelerated as provided in Article Six for
the purposes of this Subsidiary Guarantee,  notwithstanding any stay, injunction
or other prohibition extant under any applicable  bankruptcy law preventing such
acceleration in respect of the obligations guaranteed hereby.


<PAGE>
                                       4


          (c) Until such time as the Senior Discount Notes outstanding as of the
date  hereof  are fully and  finally  paid,  including  all  interest,  premium,
principal and  liquidated  damages with respect  thereto,  the Guarantor  hereby
irrevocably  waives  any  claim or other  rights  which it may now or  hereafter
acquire against the Company that arise from the existence,  payment, performance
or  enforcement  of its  obligations  under this  Subsidiary  Guarantee and this
Supplemental Indenture, including, without limitation, any right of subrogation,
reimbursement,   exoneration,   contribution,   indemnification,  any  right  to
participate  in any claim or remedy of the  Holders  against  the Company or any
collateral  which any such  Holder  or the  Trustee  on  behalf  of such  Holder
hereafter acquires, whether or not such claim, remedy or right arises in equity,
or under contract,  statute or common law, including,  without  limitation,  the
right to take or receive from the Company,  directly or  indirectly,  in cash or
other  property  or by set-off or in any other  manner,  payment or  security on
account  of such  claim  or other  rights.  If any  amount  shall be paid to the
Guarantor  in  violation of the  preceding  sentence  and the Accreted  Value or
principal  amount at maturity of, premium,  if any, and accrued  interest on the
Senior  Discount  Notes or any other  amounts  payable by the Company  under the
Senior  Discount Notes  Indenture  shall not have been paid in full, such amount
shall be deemed to have been paid to the  Guarantor for the benefit of, and held
in trust for the benefit of, the Holders and the Trustee, and shall forthwith be
paid to the Trustee for the benefit of itself and the Holders to be credited and
applied upon the  principal  of,  premium,  if any, and accrued  interest on the
Senior Discount Notes.

          (d) This Subsidiary  Guarantee shall not be valid or become obligatory
for any purpose with respect to a Senior  Discount Note until the certificate of
authentication on the Note shall have been signed by or on behalf of the Trustee
pursuant to the terms of the Indenture.

          SECTION 2.02. OBLIGATIONS UNCONDITIONAL.  (a) Subject to Section 2.05,
nothing contained in this First Supplemental Indenture or in the Senior Discount
Notes is intended to or shall impair,  as among the  Guarantor,  the Trustee and
the  Holders,   the  obligation  of  the   Guarantor,   which  is  absolute  and
unconditional,  upon failure by the Company,  to pay to the Holders the Accreted
Value or principal  amount at maturity of, premium,  if any, and interest on the
Senior  Discount  Notes  outstanding  as of the date hereof as and when the same
shall become due and payable in accordance with their terms or any other amounts
payable by the Company under the Senior Discount Notes Indenture, or is intended
to or shall affect the relative rights of the Holders, the Trustee and creditors
of the Guarantor,  nor shall anything  herein or therein  prevent the Holders of
such Senior  Discount  Notes or the Trustee on their behalf from  exercising all
remedies  otherwise   permitted  by  applicable  law  upon  default  under  this
Indenture.

          (b) Without  limiting the foregoing,  nothing  contained in this First
Supplemental  Indenture will restrict the right of the Trustee or the Holders to
take any action to declare this Subsidiary Guarantee to be due and payable prior
to the Stated  Maturity of the Senior  Discount Notes or to pursue any rights or
remedies hereunder.

          SECTION  2.03.  NOTICE TO  TRUSTEE.  The  Guarantor  shall give prompt
written  notice to the  Trustee of any fact known to the  Guarantor  which would
prohibit  the  making of any  payment  to or by the  Trustee  in respect of this
Subsidiary  Guarantee  pursuant  to the  provisions  of this First  Supplemental
Indenture.


<PAGE>
                                       5


          SECTION  2.04.  THIS  ARTICLE NOT TO PREVENT  EVENTS OF  DEFAULT.  The
failure to make a payment on account of the Accreted  Value or principal  amount
at maturity of,  premium,  if any, or interest on the Senior  Discount  Notes by
reason  of any  provision  of this  First  Supplemental  Indenture  will  not be
construed as preventing the occurrence of an Event of Default.

          SECTION  2.05.  NET  WORTH  LIMITATION.   Notwithstanding   any  other
provision  of the Senior  Discount  Notes  Indenture,  this  First  Supplemental
Indenture or the Senior Discount Notes and this Subsidiary Guarantee, this First
Supplemental  Indenture  shall not be  enforceable  against the  Guarantor in an
amount  in  excess  of  the  net  worth  of  the  Guarantor  at  the  time  that
determination  of such net worth  is,  under  applicable  law,  relevant  to the
enforceability of the Note Guarantee  pursuant to the terms of the Indenture and
the Collateral Pledge and Security  Agreement.  Such net worth shall include any
claim or future claim of the Guarantor against the Company for reimbursement and
any claim against any grantor of a Guarantee for contribution.


                                   ARTICLE III

                                  MISCELLANEOUS

          SECTION  3.01.   NOTICES.   Any  notice  or  communication   shall  be
sufficiently  given if in  writing  and  delivered  in person or mailed by first
class mail, commercial courier service or telecopier communication, addressed as
follows:

                  IF TO THE COMPANY OR THE GUARANTOR:

                           KMC Telecom Holdings, Inc.
                           1545 Route 206, Suite 300
                           Bedminster, New Jersey  07921
                           Telecopier Number:  (908) 719-8775
                           Attention: Chief Financial Officer

                                    With a copy to:

                           Kelley Drye & Warren LLP
                           101 Park Avenue
                           New York, NY  10178
                           Attention: Alan M. Epstein, Esq.

<PAGE>
                                       6

<PAGE>
                                       7



                                    and a copy to:

                           Simpson Thacher & Bartlett
                           425 Lexington Avenue
                           New York, NY 10017 - 3954
                           Attention: Arthur D. Robinson, Esq.

                  IF TO THE TRUSTEE:

                           The Chase Manhattan Bank
                           450 West 33rd Street, 15th Floor
                           New York, New York  10001-2697
                           Telecopier Number:  (212) 946-8159/8160
                           Attention: Capital Markets Fiduciary Services

                                    With a copy to:

                           Pryor Cashman Sherman & Flynn, LLP
                           410 Park Avenue
                           New York, NY  10022
                           Attention: Eric Hellige, Esq.

          The Company,  the Guarantor or the Trustee by notice to the others may
designate   additional  or  different   addresses  for  subsequent   notices  or
communications.

          SECTION 3.02.  SUCCESSORS AND ASSIGNS. All covenants and agreements of
the Company, the Guarantor and the Trustee in this First Supplemental  Indenture
shall bind their respective successors.

          SECTION 3.03.  COUNTERPARTS.  This First Supplemental Indenture may be
executed in any number of  counterparts  and by the  parties  hereto in separate
counterparts,  each of which when so executed  shall be deemed to be an original
and all of  which  taken  together  shall  constitute  one and  the  same  First
Supplemental Indenture.

          SECTION 3.04.  GOVERNING LAW. This First Supplemental  Indenture shall
be governed by and construed in  accordance  with the internal laws of the State
of New York.

          SECTION  3.05.  SEPARABILITY.  In case  any  provision  in this  First
Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining  provisions shall not in any way be
affected or impaired thereby.


<PAGE>
                                       8


          SECTION 3.06. EFFECTIVE DATE. This First Supplemental  Indenture shall
become effective as of the date hereof.

          SECTION 3.07.  INCORPORATION  INTO  INDENTURE.  All provisions of this
First  Supplemental  Indenture shall be deemed to be  incorporated  in, and made
part of, the Senior  Discount  Notes  Indenture;  and the Senior  Discount Notes
Indenture,  as amended and  supplemented by this First  Supplemental  Indenture,
shall be read, taken and construed as one and the same instrument.

          SECTION 3.08. THE TRUSTEE. The Trustee shall not be responsible for or
in respect of the validity or sufficiency of this First  Supplemental  Indenture
or for or in respect of the  recitals  contained  herein,  all of which are made
solely by the Company.


<PAGE>

                                   SIGNATURES

          IN  WITNESS  WHEREOF,  the  parties  hereto  have  caused  this  First
Supplemental  Indenture to be duly  executed,  all as of the date first  written
above.



                                                KMC TELECOM HOLDINGS, INC.



                                                By:  /s/ James D. Grenfell
                                                   -----------------------------
                                                Name:   James D. Grenfell
                                                Title:  Executive Vice President
                                                        Chief Financial Officer



                                                KMC TELECOM FINANCING, INC.
                                                   as Guarantor



                                                By:  /s/ James D. Grenfell
                                                   -----------------------------
                                                Name:   James D. Grenfell
                                                Title:  Executive Vice President
                                                        Chief Financial Officer



                                                THE CHASE MANHATTAN BANK,
                                                   as Trustee



                                                By:  /s/ P. Kelly
                                                   -----------------------------
                                                Name:  Patricia Kelly
                                                Title: Vice President


                          SECURITIES PURCHASE AGREEMENT


                                   dated as of

                                 April 30, 1999

                                     between

                           KMC TELECOM HOLDINGS, INC.

                                       and

                           FIRST UNION INVESTORS, INC.


<PAGE>

                                TABLE OF CONTENTS

                                                                           PAGE
                                                                           ----

ARTICLE I.  DEFINITIONS......................................................1

         SECTION 1.01.  Definitions..........................................1

ARTICLE II.  PURCHASE AND SALE OF SECURITIES.................................4

         SECTION 2.01.  Commitment to Purchase...............................4
         SECTION 2.02.  The Closing..........................................4
         SECTION 2.03.  Use of Proceeds......................................5
         SECTION 2.04.  Allocation of Consideration..........................5

ARTICLE III.  REPRESENTATIONS AND WARRANTIES OF THE ISSUER...................5

         SECTION 3.01.  Organization, Standing, etc..........................5
         SECTION 3.02.  Capitalization.......................................6
         SECTION 3.03.  Authorization; Non-Contravention.....................7
         SECTION 3.04.  Binding Effect.......................................7
         SECTION 3.05.  Governmental Regulation..............................8
         SECTION 3.06.  Solicitation.........................................8
         SECTION 3.07.  Authorization to Do Business.........................8
         SECTION 3.08.  Compliance with Laws.................................9
         SECTION 3.09.  Litigation...........................................9
         SECTION 3.10.  Properties...........................................9
         SECTION 3.11.  Tax Matters..........................................9
         SECTION 3.12.  Patents and Trademarks...............................9
         SECTION 3.13.  Labor Matters........................................9
         SECTION 3.14.  Environmental Matters...............................10
         SECTION 3.15.  Insurance...........................................10
         SECTION 3.16.  Year 2000...........................................10
         SECTION 3.17.  Certain Existing Agreements.........................11
         SECTION 3.18.  Financial Information...............................11
         SECTION 3.19.  Disclosure..........................................11
         SECTION 3.20.  Investment Company Act..............................11
         SECTION 3.21.  Brokers.............................................11

                                      i
<PAGE>

ARTICLE IV.  REPRESENTATIONS AND WARRANTIES OF THE PURCHASER................12

         SECTION 4.01.  Organization........................................12
         SECTION 4.02.  Authority; No Other Action..........................12
         SECTION 4.03.  No Conflict.........................................12
         SECTION 4.04.  Binding Effect......................................12
         SECTION 4.05.  No Defaults.........................................12
         SECTION 4.06.  Private Placement...................................12

ARTICLE V.  CONDITIONS PRECEDENT TO CLOSING.................................13

         SECTION 5.01.  Conditions to the Purchaser's Obligations...........13
         SECTION 5.02.  Conditions to Issuer's Obligations..................14

ARTICLE VI.  COVENANTS......................................................15

         SECTION 6.01.  Covenants of the Issuer.............................15

ARTICLE VII.  MISCELLANEOUS.................................................16

         SECTION 7.01.  Notices.............................................16
         SECTION 7.02.  No Waivers..........................................17
         SECTION 7.03.  Successors and Assigns..............................17
         SECTION 7.04.  New York Law........................................17
         SECTION 7.05.  Counterparts; Effectiveness.........................17
         SECTION 7.06.  Entire Agreement....................................17
         SECTION 7.07.  Expenses............................................18

                                       ii
<PAGE>


EXHIBITS
- --------

Exhibit   A Certificate of Amendment to Certificate of  Designations of Series A
          Preferred Stock

Exhibit   B Certificate of Amendment to Certificate of  Designations of Series C
          Preferred Stock

Exhibit   C Certificate of Amendment to Certificate of  Designations of Series D
          Preferred Stock

Exhibit   D Certificate of Amendment to Certificate of  Designations of Series E
          Preferred Stock

Exhibit   E Certificate of Amendment to Certificate of  Designations of Series F
          Preferred Stock

Exhibit   F Form of Amendment No. 5 to the Stockholders Agreement

Exhibit   G Form of Preferred Stock Registration Rights Agreement


SCHEDULES
- ---------

Schedule 3.01     -   Organization; Capital Stock; Subsidiaries

Schedule 3.02     -   Capitalization of Issuer

Schedule 3.08     -   Compliance with Laws

Schedule 3.09     -   Litigation

Schedule 3.10     -   Liens on Property

Schedule 3.14     -   Environmental Matters

Schedule 3.17     -   Encumbrances and Restrictions

                                      iii

<PAGE>


          SECURITIES PURCHASE AGREEMENT (this "Agreement") dated as of April 30,
1999 between KMC Telecom Holdings,  Inc., a Delaware corporation (the "Issuer"),
and First Union Investors, Inc., a North Carolina corporation (the "Purchaser").

          The parties hereto agree as follows:


                                    ARTICLE I

                                   DEFINITIONS


          SECTION 1.01.  DEFINITIONS.  The following terms, as used herein, have
the following meanings:

          "Amendment No. 5" means Amendment No. 5 to the Stockholders  Agreement
in the form attached to this Agreement as Exhibit F.

          "Certificates of Amendment" means the Certificates of Amendment to the
Certificates of Designations  with respect to the Series A Preferred  Stock, the
Series C Preferred  Stock,  the Series D Preferred Stock, the Series E Preferred
Stock and the Series F Preferred Stock, in  substantially  the forms attached to
this Agreement as Exhibits A, B, C, D and E, respectively.

          "Certificate  of  Designations"  means the Certificate of Designations
with  respect  to the  Series E  Preferred  Stock as  previously  filed with the
Secretary  of State of Delaware,  as amended by the  Certificate  of  Correction
dated  February  19, 1999 and filed with the  Secretary  of State of Delaware on
March 3, 1999, as further  amended by the  Certificate of Amendment with respect
to the Series E Preferred  Stock (Exhibit D to this  Agreement)  dated as of the
date hereof.

          "Charter" means the Amended and Restated  Certificate of Incorporation
of the Issuer, as amended as of the Closing Date.

          "Closing" has the meaning set forth in Section 2.02.

          "Closing Date" has the meaning set forth in Section 2.02.

          "Common  Stock" means the Common Stock,  par value $.01 per share,  of
the Issuer.

          "Environmental Laws" shall mean any applicable law concerning releases
into any part of the natural  environment,  or protection of natural  resources,
the  environment and public and employee  health and safety  including,  without
limitation, the Comprehensive Environmental Response, Compensation and Liability
Act (42 U.S.C. ss. 9601 et seq.), the Hazardous Materials Transportation Act (49


                                       1
<PAGE>

U.S.C. ss. 1801 et seq.), the Resource  Conservation and Recovery Act (42 U.S.C.
ss. 6901 et seq.),  the Clean Water Act (33 U.S.C.  ss. 1251 et seq.), the Clean
Air Act (33 U.S.C.  ss.  7401 et seq.),  the Toxic  Substances  Control  Act (15
U.S.C. ss. 7401 et seq.), and the Occupational  Safety and Health Act (29 U.S.C.
ss.  651 et seq.),  as such laws have been and may be  amended  or  supplemented
through the Closing Date, and the regulations  promulgated pursuant thereto, and
any applicable state or local statutes, and the regulations promulgated pursuant
thereto.

          "Exchange Act" means the  Securities  Exchange Act of 1934, as amended
from time to time, or any successor statute.

          "Existing  Warrant   Agreement"  means  the  Warrant  Agreement  dated
February 4, 1999,  as amended on April 29, 1999,  between the Company,  Newcourt
Commercial Finance Corporation,  Lucent Technologies Inc., the Purchaser and The
Chase Manhattan Bank relating to the Existing Warrants.

          "Existing  Warrants"  means the  52,272  existing  warrants  issued to
Newcourt and Lucent pursuant to the Existing Preferred Warrant Agreement.

          "GAAP" means generally  accepted  accounting  principles in the United
States of  America  as in  effect as of the  Closing  Date,  including,  without
limitation, those set forth in the opinions and pronouncements of the Accounting
Principles Board of the American  Institute of Certified Public  Accountants and
statements and pronouncements of the Financial  Accounting Standards Board or in
such other statements by such other entity as approved by a significant  segment
of the accounting profession.

          "Lien"  means any lien,  claim,  charge,  pledge,  mortgage,  security
interest or other encumbrance.  "Loan and Security Agreement" means the Loan and
Security  Agreement,  dated as of February 4, 1999, among KMC Telecom III, Inc.,
KMC Telecom Leasing III LLC,  certain lenders from time to time parties thereto,
Lucent and the Collateral Agent (as defined therein).

          "Lucent" means Lucent Technologies Inc., a Delaware corporation.

          "Material  Adverse  Effect" means a material  adverse  effect,  or any
event,  occurrence,  state of circumstances or facts or development  involving a
prospective  material  adverse  effect,  on the  business,  operations,  assets,
condition (financial or otherwise),  results of operations,  properties, assets,
value or prospects of the Issuer and its Subsidiaries taken as a whole.

          "Newcourt" means Newcourt Commercial Finance  Corporation,  a Delaware
corporation.

          "Person"   means   an   individual,   general   partnership,   limited
partnership, corporation, limited liability company, trust, joint stock company,
association, joint venture or any other entity or organization, whether or not a


                                       2
<PAGE>

legal entity,  including a government or political  subdivision  or an agency or
instrumentality thereof.

          "Preferred  Stock" means the shares of Series E Preferred Stock issued
to the Purchaser under this Agreement.

          "Preferred Stock  Registration  Rights  Agreement" means the Preferred
Stock  Registration  Rights  Agreement  dated as of the date hereof  between the
Issuer and the Purchaser in the form attached to this Agreement as Exhibit G.

          "Regulation D" means Regulation D under the Securities Act.

          "Securities"  means,  collectively,  the Series E Unit,  the shares of
Preferred Stock and the Warrants  comprising the Series E Unit, and the warrants
to be issued under the Existing Warrant Agreement,  all of which will be sold by
the Issuer and purchased by the Purchaser as set forth in Section 2.01.

          "Securities Act" means the Securities Act of 1933, as amended.

          "Series A Preferred Stock" has the meaning set forth in Section 3.02.

          "Series C Preferred Stock" has the meaning set forth in Section 3.02.

          "Series D Preferred Stock" has the meaning set forth in Section 3.02.

          "Series E Preferred Stock" has the meaning set forth in Section 3.02.

          "Series E Unit" has the meaning set forth in Section 2.01.

          "Series  F  Certificate  of  Designations"  means the  Certificate  of
Designations  with respect to the Series F Preferred  Stock as previously  filed
with the  Secretary  of State of  Delaware,  as  amended by the  Certificate  of
Amendment  with  respect to the Series F  Preferred  Stock  dated as of the date
hereof (Exhibit E to this Agreement).

          "Series F Preferred Stock" has the meaning set forth in Section 3.02.

          "Springing  Warrants"  means the 227,273  warrants which may be issued
pursuant to Section 2.4 of the Existing Warrant Agreement.

          "Stockholders  Agreement" means the Amended and Restated  Stockholders
Agreement dated as of October 31, 1997, as previously  amended by Amendments No.
1, No. 2, No. 3 and No. 4, among the Issuer,  Nassau Capital  Partners L.P., NAS
Partners 1 L.L.C.,  Harold N.  Kamine,  KMC  Telecommunications  L.P.,  Newcourt
Commercial Finance Corporation, as successor to AT&T Credit Corporation, General
Electric  Capital  Corporation,  First Union  National  Bank,  as  successor  to
CoreStates Bank, N.A. and CoreStates Holdings, Inc.

                                       3
<PAGE>

          "Subsidiary"  means,  with  respect to any  Person,  any  corporation,
association or other  business  entity of which more than fifty percent (50%) of
the total voting power of shares of capital stock  entitled  (without  regard to
the  occurrence  of any  contingency)  to vote  in the  election  of  directors,
managers or trustees thereof, or at least a majority of the ownership interests,
and the power to direct the policies,  management and affairs thereof, is at the
time owned or controlled,  directly or indirectly, by such Person or one or more
of the other Subsidiaries of such Person or a combination thereof.

          "Taxes"  shall  mean  all  taxes,  charges,   fees,  levies  or  other
assessments,  including,  without  limitation,  all net income,  gross receipts,
capital,  sales, use, ad valorem,  value added,  transfer,  franchise,  profits,
inventory,  capital stock, license,  withholding,  payroll,  employment,  social
security,  unemployment,  excise,  severance,  stamp,  occupation,  property and
estimated  taxes,  customs,  duties,  fees,  assessments and charges of any kind
whatsoever,  together with any interest and any penalties,  fines,  additions to
tax or additional amounts imposed by any public or governmental taxing authority
(domestic or foreign) and shall include any  transferee  liability in respect of
Taxes.

          "Tax  Returns"   shall  mean  all  returns,   declarations,   reports,
estimates, information returns and statements required to be filed in respect of
any Taxes.

          "Warrant  Agreement"  means  the  warrant  agreement,  dated  the date
hereof,  between the Issuer,  the  Purchaser  and The Chase  Manhattan  Bank, as
warrant agent.

          "Warrant Registration Rights Agreement" means the warrant registration
rights agreement, dated the date hereof, between the Issuer and the Purchaser.

          "Warrants" means the warrants to purchase shares of Common Stock to be
issued  pursuant to the Warrant  Agreement;  each warrant  entitling  the holder
thereof to purchase 0.471756 shares of Common Stock.


                                   ARTICLE II

                         PURCHASE AND SALE OF SECURITIES

          SECTION  2.01.  COMMITMENT  TO PURCHASE.  (a) Subject to the terms and
conditions  hereinafter  stated,  upon  the  basis  of the  representations  and
warranties of the  Purchaser  herein  contained,  the Issuer agrees to issue and
sell to the Purchaser and, upon the basis of the  representations and warranties
of the Issuer herein contained, the Purchaser agrees to purchase from the Issuer
the Series E Unit, which consists of (i) an aggregate of 35,000 shares of Series
E Preferred Stock,  and (ii) 94,513 Warrants (the "Series E Unit"),  on the date
hereof for the aggregate purchase price of $32,950,470.

          (b) Subject to the terms and conditions  hereinafter  stated, upon the
basis of the  representations  and warranties of the Purchaser herein contained,
the Issuer agrees to issue and sell to the Purchaser  and, upon the basis of the
representations  and  warranties of the Issuer herein  contained,  the Purchaser
agrees to purchase from the Issuer 33,419  warrants  under the Existing  Warrant
Agreement,  on the date hereof for the aggregate  purchase price,  $2,049,530 by
complying  with  the  requirements  of  Section  2.5  of  the  Existing  Warrant


                                       4
<PAGE>

Agreement. The Purchaser will, immediately upon issuance of such warrants to the
Purchaser,  transfer all such  warrants  purchased  under the  Existing  Warrant
Agreement to Newcourt for no additional  consideration  from,  and at no cost or
expense to Newcourt.

          SECTION 2.02. THE CLOSING. (a) Subject to the fulfillment or waiver of
the  conditions  set forth in  Article V hereof,  the  purchase  and sale of the
Securities,  as set forth in Section 2.01 (the  "Closing"),  shall take place at
the  offices of Kelley  Drye & Warren LLP at 10:00 a.m. on the date hereof or on
such other date and at such other location as the Issuer and the Purchaser shall
agree.  The date and time of the Closing are  referred to herein as the "Closing
Date."

          (b) At the Closing, the Purchaser shall deliver to the Issuer, by wire
transfer (of immediately available funds) to an account designated by the Issuer
in writing delivered to the Purchaser,  the consideration referred to in Section
2.01(c).

          (c) At the Closing, the Issuer shall deliver to the Purchaser, against
payment  of  the  consideration  set  forth  in  Section  2.01(c),  certificates
evidencing  the  Series E Unit  (including  the  Preferred  Stock  and  Warrants
referred to therein),  and certificates  evidencing the Warrants issued pursuant
to section 2.01(b), in each case registered in the name of the Purchaser.


          SECTION 2.03.  USE OF PROCEEDS.  The proceeds from the issuance of the
Series  E  Unit  will  be  used  to  make  equity  contributions  and  Qualified
Intercompany  Loans  (as  defined  in the Loan and  Security  Agreement)  to KMC
Telecom  III,  Inc. and to pay fees and  expenses  relating to the  transactions
contemplated by this Agreement.

          SECTION  2.04.  ALLOCATION  OF  CONSIDERATION.   The  Issuer  and  the
Purchaser  hereby agree that the  allocation of the  consideration  described in
Section 2.01(a) for the Preferred Stock and the Warrants comprising the Series E
Unit shall be as follows: $27,154,150 of the consideration shall be allocated to
the Preferred Stock, and $5,796,320 of the  consideration  shall be allocated to
the Warrants.  In light of the highly  conditional nature of the purchase rights
provided for in the  Springing  Warrants,  the parties agree that for income tax
purposes  only,  none of the  consideration  paid by the  Purchaser  under  this
Agreement will be allocated to the Springing Warrants.


                                   ARTICLE III

                  REPRESENTATIONS AND WARRANTIES OF THE ISSUER

          The Issuer  represents  and warrants to the Purchaser as follows as of
the Closing Date:

          SECTION  3.01.  ORGANIZATION,  STANDING,  ETC.  (a)  The  Issuer  is a
corporation duly  incorporated,  validly existing and in good standing under the
laws of the  State  of  Delaware  and  has all  requisite  corporate  power  and
authority  under such laws to own or lease and  operate  its  properties  and to
carry on its business as now conducted. The Issuer is duly qualified or licensed
to do business as a foreign corporation in good standing in each jurisdiction in


                                       5
<PAGE>

which the  nature  of the  business  transacted  by it or the  character  of the
properties  owned or leased by it  requires  it to so  qualify  or be  licensed,
except  where the failure to so qualify or be  licensed  or be in good  standing
would not have a Material  Adverse Effect.  The copies of the Issuer's  Charter,
bylaws and other  organizational  documents  and  instruments  (in each case, as
amended and/or restated  through the date hereof),  heretofore made available to
the Purchaser, are true, complete and correct copies thereof.

          (b) Each  Subsidiary  of the  Issuer  is duly  organized  and  validly
existing  under  the  laws of the  jurisdiction  of its  formation,  and has all
corporate  or other power and  authority to own its  properties  and conduct its
business as now conducted.  All the outstanding  shares of capital stock of each
corporate  Subsidiary of the Issuer have been duly authorized and validly issued
and are fully paid and  nonassessable  and, except as disclosed on SCHEDULE 3.01
hereto,  are owned  directly or  indirectly  by the Issuer free and clear of all
liens, security interests, charges and encumbrances. The Issuer does not own any
interest in any other company or entity other than the Subsidiaries set forth on
SCHEDULE  3.01.  Except  as set  forth on  SCHEDULE  3.01  hereto,  there are no
outstanding options,  warrants,  rights,  agreements or commitments to any third
party to subscribe for or purchase any equity  security of any  Subsidiary or to
cause any Subsidiary to issue any such equity security.

          SECTION  3.02.  CAPITALIZATION.  (a) The Issuer's  authorized  capital
stock  consists of  3,000,000  shares of Common  Stock and  1,128,800  shares of
preferred  stock.  Of the  1,128,800  authorized  shares of preferred  stock (i)
123,800 shares have been designated as Series A Cumulative Convertible Preferred
Stock (the "Series A Preferred  Stock") all of which are currently  outstanding,
(ii) 350,000  shares have been  designated  as Series C  Cumulative  Convertible
Preferred  Stock (the "Series C Preferred  Stock") of which  175,000  shares are
currently  outstanding,  (iii) 25,000  shares have been  designated  as Series D
Cumulative Convertible Preferred Stock (the "Series D Preferred Stock") of which
none are currently outstanding,  (iv) 575,000 shares have been designated as the
Series E Senior  Redeemable,  Exchangeable,  PIK Preferred  Stock (the "Series E
Preferred  Stock"),  of  which  60,695  shares  will  be  outstanding  upon  the
consummation of the purchase of the Series E Unit pursuant to this Agreement and
55,000 shares have been  reserved for issuance  upon  conversion of the Series F
Preferred  Stock,  and (v) 55,000 shares have been designated as Series F Senior
Redeemable,  Exchangeable, PIK Preferred Stock (the "Series F Preferred Stock"),
of which 41,112 shares are currently  outstanding.  Of the 3,000,000  authorized
shares of Common  Stock:  (i) 837,876  shares are issued and  outstanding,  (ii)
600,000  shares have been reserved for issuance upon  conversion of the Series A
Preferred  Stock,  (iii)  333,333  shares have been  reserved for issuance  upon
conversion  of the  Series C  Preferred  Stock,  (iv)  10,000  shares  have been
reserved  for  issuance  upon  exercise  of a warrant  held by General  Electric
Capital  Corporation,  (v) 100,385  shares have been  reserved for issuance upon
exercise of warrants issued in connection  with the Issuer's  offering of its 12
1/2% Senior Discount Notes,  (vi) 195,000 shares have been reserved for issuance
upon exercise of the Warrants, the Existing Warrants and the Springing Warrants,
(vii) 262,750 shares have been reserved for issuance pursuant to options granted
under the 1998 Stock  Purchase and Option Plan for Key  Employees of KMC Telecom
Holdings,  Inc. and  Affiliates  and (viii) no shares are held in  treasury.  No
other shares of capital  stock have been issued or reserved for issuance for any
purpose.  All of the outstanding shares of capital stock of the Issuer have been
duly authorized and validly issued,  are fully paid and  nonassessable,  free of
preemptive  rights and have been  offered and issued  without  violation  of the
Securities  Act or any  preemptive  rights of any person.  SCHEDULE  3.02 hereto
accurately  sets  forth,  as of the  date  hereof,  the  number  of  issued  and
outstanding  shares of Common  Stock held by each person  known by the Issuer to
own beneficially or of record any shares of the Issuer's capital stock.

                                       6
<PAGE>

          (b) Except as  disclosed  on SCHEDULE  3.02  hereto:  (i) there are no
issued or outstanding  securities that are convertible  into or exchangeable for
shares of the Issuer's capital stock ("Convertible Securities");  (ii) there are
no issued or  outstanding  subscriptions,  options,  warrants or other rights to
purchase  or  acquire  any  shares  of the  capital  stock of the  Issuer or any
Convertible  Securities  ("Option  Rights")  other than the Warrants;  (iii) the
Issuer is not a party to any agreement or understanding  pursuant to which it is
obligated  to  purchase  or  redeem  any  shares  of its  capital  stock  or any
Convertible  Securities or Option Rights,  other than pursuant to the redemption
provisions in respect of the Series E Preferred Stock and the Series F Preferred
Stock set forth in the Certificate of Designations  and the Series F Certificate
of  Designations,  respectively,  and is not otherwise  under any  obligation to
repurchase,  redeem or otherwise  acquire any shares of its capital stock or any
Convertible  Securities or Option Rights;  (iv) the Issuer is not a party to any
agreement  or  understanding  pursuant to which it is  obligated to register any
shares of its capital stock or other  securities under the Securities Act or any
state  securities  law; and (v) the Issuer is not, and to the best  knowledge of
the  Issuer,  no  securities  holder  of the  Issuer  is a party  to any  voting
agreement,  voting trust,  irrevocable  proxy or other  agreement  affecting the
voting  rights of any  shares of the  Issuer's  capital  stock or any  agreement
providing  for any call or put option,  right of first refusal or offer or other
right to acquire or dispose of any shares of the Issuer's  capital  stock or any
Convertible  Securities or Option Rights. Except as described in Section 3.02(a)
or Schedule  3.02,  no shares of Common Stock are issuable  upon the exercise of
any  outstanding  Convertible  Securities  or Option Rights of the Issuer and no
additional  shares of Common Stock will become  issuable  upon  exercise of such
Convertible  Securities  or Option  Rights on  account  of the  issuance  of the
warrants.

          SECTION  3.03.   AUTHORIZATION;   NON-CONTRAVENTION.   The  execution,
delivery and performance by the Issuer of this Agreement, the Warrant Agreement,
the Warrant  Registration  Rights  Agreement,  the Preferred Stock  Registration
Rights  Agreement and  Amendment  No. 5, the issuance,  sale and delivery by the
Issuer of the  Securities  and the warrants  issued to the  Purchaser  under the
Existing  Warrant  Agreement,  the  execution  of  Springing  Warrants,  and the
amendments  to the  Charter  effected  by the  filing  of  the  Certificates  of
Amendment are within the Issuer's corporate powers, have been duly authorized by
all necessary corporate action, require no action by or in respect of, or filing
with, any  governmental  body,  agency or official (other than the filing of the
Certificates  of Amendment  with the  Secretary of State of Delaware) and do not
(i)  contravene or constitute a default under any provision of applicable law or
regulation,  judgment, injunction, order or decree binding upon or applicable to
the Issuer,  (ii) contravene or constitute a default under the Charter or bylaws
or (iii)  require  any  consent,  approval or other  action by any other  Person
(other than the holders of the Series A Preferred  Stock, the Series C Preferred
Stock, the ouststanding  Series E Preferred Stock, the Series F Preferred Stock,
and the other parties to the  Stockholders  Agreement,  which  consents shall be
obtained  prior to the Closing Date) or constitute a default under or contravene
any material agreement,  judgment, injunction, order, decree or other instrument
binding upon the Issuer or any of its Subsidiaries.

          SECTION 3.04. BINDING EFFECT.  This Agreement,  the Warrant Agreement,
the Warrant  Registration  Rights  Agreement,  the Preferred Stock  Registration
Rights  Agreement and Amendment  No. 5 have been duly  authorized,  executed and
delivered by the Issuer and constitute valid and legally binding  obligations of
the Issuer,  enforceable in accordance with their  respective  terms,  except as
enforceability   may  be   limited   by   applicable   bankruptcy,   insolvency,
reorganization,  moratorium  and  similar  laws  affecting  the  enforcement  of


                                       7
<PAGE>

creditors'  rights  generally  and by  general  principles  of  equity  (whether
enforcement  is sought by  proceedings in equity or at law). The Issuer has duly
authorized  the issuance,  sale and delivery of the  Securities to the Purchaser
and, when issued and delivered by the Issuer pursuant to this Agreement  against
payment  of the  consideration  set  forth  herein,  and,  with  respect  to the
Warrants,  countersigned  by the  Warrant  Agent  (as  defined  in  the  Warrant
Agreement),  with  respect to the warrants  issued  under the  Existing  Warrant
Agreement,  countersigned  by the Warrant Agent under such agreement (as defined
in the Existing  Warrant  Agreement),  and with respect to the Preferred  Stock,
authenticated   by  the  Transfer  Agent  (as  defined  in  the  Certificate  of
Designations),   the  Securities  will  be  validly   issued,   fully  paid  and
non-assessable  free  and  clear  of all  Liens  and  without  violation  of any
preemptive  rights.  The Issuer has duly authorized the issuance and delivery of
the Springing  Warrants in accordance with the terms and conditions set forth in
Section 2.4 of the Existing Warrant  Agreement,  and, when  countersigned by the
Warrant  Agent under the  Existing  Warrant  Agreement  and  delivered  pursuant
Section 2.4 of the Existing Warrant  Agreement,  the Springing  Warrants will be
validly issued,  fully paid and  non-assessable  free and clear of all Liens and
without violation of any preemptive rights. All of the shares of Common Stock to
be issued upon  exercise of the Warrants,  the warrants  issued to the Purchaser
under the Existing Warrant Agreement,  and the Springing Warrants have been duly
and validly  authorized  and reserved for issuance  upon such exercise and, when
issued and delivered,  upon exercise of the Warrants,  the warrants issued under
the Existing Warrant Agreement and the Springing Warrants in accordance with the
terms of the Warrant  Agreement or the Existing Warrant  Agreement,  as the case
may be, will be duly and validly issued,  fully paid and non-assessable free and
clear of all Liens and without violation of any preemptive rights.

          SECTION 3.05. GOVERNMENTAL REGULATION.  Except for the Securities Act,
the Exchange  Act and state  securities  laws,  the Issuer is not subject to any
federal or state or foreign law or regulation  limiting its ability to issue the
Securities or the  Springing  Warrants or to perform its  obligations  under the
terms of this Agreement,  the Warrant Agreement, the Warrant Registration Rights
Agreement,  the Preferred Stock Registration Rights Agreement,  Amendment No. 5,
the Securities or the Springing Warrants.  Except as may be required pursuant to
"blue sky laws" or as may be required  under the  Securities Act or the Exchange
Act in connection  with the  registration  of the Warrant Shares as contemplated
under the Warrant  Registration  Rights  Agreement  or the  registration  of the
Series  E  Preferred  Stock  under  the  Preferred  Stock  Registration   Rights
Agreement,  no notices,  reports or other filings are required to be made by the
Issuer  or  any   Subsidiary   with,   nor  are  any  consents,   registrations,
applications,  approvals,  permits,  licenses or  authorizations  required to be
obtained  by the  Issuer or any  Subsidiary  from,  any  public or  governmental
authority or other third party in connection  with the execution and delivery of
this  Agreement,   the  Warrant  Agreement,   the  Warrant  Registration  Rights
Agreement, the Preferred Stock Registration Rights Agreement or Amendment No. 5,
or the  consummation by the Issuer of the  transactions  contemplated  hereby or
thereby,  or the exercise by the Purchaser of its rights  hereunder,  except for
(i) any of the foregoing,  the failure of which to make or obtain would not have
a Material Adverse Effect or adversely affect the Purchaser's  rights hereunder,
(ii) the consent, with respect to the Certificates of Amendment,  of the holders
of the Series A Preferred  Stock,  the Series C Preferred Stock, the outstanding
Series E Preferred Stock and the Series F Preferred Stock,  which consents shall
be obtained  prior to the Closing Date,  and (iii) the consent,  with respect to
Amendment  No. 5, of the other  parties  to the  Stockholders  Agreement,  which
consent shall be obtained prior to the Closing Date.

          SECTION  3.06.   SOLICITATION.   Assuming  the   representations   and
warranties  of the  Purchaser  set forth in  Section  4.06  hereof  are true and
correct in all material respects,  the offer and sale of the Securities pursuant


                                       8
<PAGE>

to this  Agreement  and the issuance of the shares of Common Stock upon exercise
of the Warrants and the Springing  Warrants pursuant to the Warrant Agreement or
the  Existing  Warrant  Agreement,  as the case may be,  will be exempt from the
registration requirements of the Securities Act. No form of general solicitation
or general  advertising was used by the Issuer or, to the best of its knowledge,
any other  Person  acting on its  behalf,  in  respect of the  Securities  or in
connection with the offer and sale of the Securities. Neither the Issuer nor any
Person acting on behalf of the Issuer has, either  directly or indirectly,  sold
or offered  for sale to any Person any of the  Securities  or any other  similar
security of the Issuer except as  contemplated  by this  Agreement.  Neither the
Issuer nor any Person acting on its behalf has, in connection  with the offering
of the  Securities,  engaged in any action that would  require the  registration
under the Securities Act of the offering and sale of the Securities  pursuant to
this Agreement.

          SECTION  3.07.  AUTHORIZATION  TO DO  BUSINESS.  The  Issuer  and  its
Subsidiaries (i) possess all licenses, certificates,  authorizations,  approvals
and  permits  issued  by  the  appropriate  federal,  state,  local  or  foreign
regulatory  authorities  necessary to conduct their  respective  businesses,  as
presently conducted, excepting any license, certificate, authorization, approval
or permit, the failure to possess which,  singly or in the aggregate,  could not
reasonably be expected to result in a Material  Adverse Effect and (ii) have not
received any notice of proceedings relating to revocation or modification of any
such license, certificate,  authorization, approval or permit, nor is the Issuer
or any of its  Subsidiaries  in  violation  of, or in  default  under,  any such
license,  authorization,  approval  or permit  or any  decree,  order,  judgment
applicable to the Issuer or its Subsidiaries  the effect of which,  singly or in
the  aggregate,  could  reasonably  be expected to result in a Material  Adverse
Effect.

          SECTION 3.08.  COMPLIANCE  WITH LAWS.  Except as set forth on SCHEDULE
3.08 hereto and except as would not have a Material Adverse Effect, the business
of the  Issuer  and each of the  Subsidiaries  has been and is  presently  being
conducted in compliance  with all applicable  federal,  state,  county and local
ordinances, statutes, rules, regulations and laws (collectively "Laws").

          SECTION 3.09. LITIGATION. Except as set forth on SCHEDULE 3.09 hereto,
there are no pending actions, suits, proceedings, arbitrations or investigations
against  or  affecting  the  Issuer or any of its  Subsidiaries  or any of their
respective properties, assets or operations, or with respect to which the Issuer
or any such  Subsidiary  is  responsible  by way of  indemnity  or  otherwise (a
"Material Claim") that, if there is an adverse decision, could singly, or in the
aggregate,  with all such other actions,  suits,  investigations or proceedings,
have a Material  Adverse  Effect,  and, to the knowledge of the Issuer,  no such
actions, suits, proceedings or investigations are threatened.

          SECTION 3.10. PROPERTIES. Except as described in SCHEDULE 3.10 hereto,
the  Issuer and its  Subsidiaries  have good and  marketable  title to all their
material  property  and  assets,   free  and  clear  of  all  Liens  except  (a)
materialmen's, mechanics', carriers', workmen's, warehousemen's, repairmen's, or
other like Liens  arising in the  ordinary  course of business  with  respect to
moneys  not yet due and  payable;  (b) Liens for  current  Taxes not yet due and
payable or which are being contested in good faith and by proper procedures;  or
(c) Liens or minor imperfections of title that do not materially  interfere with
the use or materially detract from the value of such property.

                                       9
<PAGE>

          SECTION 3.11. TAX MATTERS.  The Issuer and its Subsidiaries have filed
all Tax  Returns  required  to be filed and are not in default in the payment of
any Taxes which were  payable  pursuant to such  returns or any  assessments  in
respect  thereof,  other  than any which the  Issuer or any such  Subsidiary  is
contesting in good faith by proper procedures.

          SECTION  3.12.  PATENTS  AND  TRADEMARKS.  Each of the  Issuer and its
Subsidiaries  has  sufficient  right,   title  and  ownership  of  all  patents,
trademarks, service marks, trade names, copyrights, licenses with respect to the
foregoing,  information,  proprietary rights and processes,  or shall be able to
obtain all such licenses and other authority  necessary or useful for the lawful
conduct of its business as it is contemplated to be conducted, without any known
conflicts  with the rights of  others.  No  stockholder,  officer,  director  or
employee  of the  Issuer or any  Subsidiary  owns any rights  therein  which are
competitive  with those to be owned or used by the Issuer and any  Subsidiaries.
Neither  the  Issuer  nor any  Subsidiary  has  been  sued or  charged  with any
infringement of any patent,  license or permit or has knowledge of any basis for
any such claim.

          SECTION 3.13. LABOR MATTERS. (a) Neither the Issuer nor any Subsidiary
is party to any labor or collective  bargaining agreement and there are no labor
or collective  bargaining agreements which pertain to employees of the Issuer or
any Subsidiary.

          (b) No employees of the Issuer or any  Subsidiary  are  represented by
any labor  organization.  No labor  organization  or group of  employees  of the
Issuer or any Subsidiary has made a demand for recognition or certification, and
there are no representation or certification  proceedings or petitions seeking a
representation  proceeding presently pending or, to the knowledge of the Issuer,
threatened  to be brought or filed,  with the NLRB or any other labor  relations
tribunal or authority.  To the knowledge of the Issuer,  there are no organizing
activities  involving the Issuer or any  Subsidiary  pending with, or threatened
by, any labor organization.

          (c)  There  are  no  strikes,  work  stoppages,  slowdowns,  lockouts,
material  arbitrations  or material  grievances or other material labor disputes
pending or, to the knowledge of the Issuer,  threatened against or involving the
Issuer or any  Subsidiary.  Except as would not result in any  Material  Adverse
Effect,  there are no unfair labor  practice  charges,  grievances or complaints
pending or, to the  knowledge of the Issuer,  threatened  by or on behalf of any
employee or group of employees of the Issuer or any Subsidiary.

          SECTION  3.14.  ENVIRONMENTAL  MATTERS.  (a)  Except  as set  forth in
SCHEDULE  3.14,  (i) each of the  Issuer  and the  Subsidiaries  is in  material
compliance  with all  Environmental  Laws and (ii)  neither  the  Issuer nor any
Subsidiary has received any written communication from a governmental  authority
with respect to such compliance or the failure thereof.

          (b)  Except  as set  forth in  SCHEDULE  3.14,  (i) there is no civil,
criminal  or  administrative  action,  claim,  demand,  investigation  or notice
relating to a  violation  of an  Environmental  Law (an  "Environmental  Claim")
pending or, to the knowledge of the Issuer, threatened and (ii) to the knowledge
of the Issuer, there are no past or present actions, activities,  circumstances,
conditions,  events or incidents,  including,  without limitation,  the release,
emission, discharge or disposal of any chemical, pollutant,  contaminant, waste,
toxic substance,  petroleum or petroleum  product,  that would form the basis of
any  Environmental  Claim,  in  either  case  (A)  against  the  Issuer  or  any
Subsidiary,   (B)  against  any  person  or  entity  whose   liability  for  any
Environmental  Claim the Issuer or any  Subsidiary  has or may have  retained or


                                       10
<PAGE>

assumed either  contractually  or by operation of law, or (C) involving any real
or personal  property which the Issuer or any Subsidiary owns, leases or manages
except, in each case, as would not have a Material Adverse Effect.

          SECTION  3.15.  INSURANCE.  The  Issuer and its  Subsidiaries,  in the
reasonable  determination of the Issuer's management,  maintain with financially
sound  and  reputable  insurers  insurance  against  loss or damage of the kinds
customarily insured against by corporations of established reputation engaged in
the same or a similar business and similarly situated,  and of such types and in
such amounts as is customarily carried under similar circumstances by such other
corporations.

          SECTION  3.16.  YEAR 2000.  The Issuer has  engaged in a review of the
hardware and software  products used by the Issuer and the Subsidiaries in their
businesses  (collectively,  the "SOFTWARE")  which it believes to be adequate to
identify  any  material  deficiency  in "Year  2000  Capabilities".  "Year  2000
Capabilities"  means the ability of the  Software  (i) to manage and  manipulate
data  involving  dates,  including  single  century  formulas and  multi-century
formulas, and to not generate incorrect values or invalid results involving such
dates, (ii) to provide that all date-related user interface  functionalities and
data fields  include the  indication  of century,  and (iii) to provide that all
date-related data interface  functionalities  include the indication of century.
The Issuer is taking  appropriate  steps to identify exposure to deficiencies in
Year 2000 Capabilities resulting from the Year 2000 Capabilities of its vendors,
and to address them on a timely basis. In addition,  the Issuer believes that it
has adequate  resources to cause its Software to include Year 2000  Capabilities
which  currently may not contain them and that the costs of causing its Software
to  include  Year  2000  Capabilities  will  not be  material  to  the  Issuer's
consolidated financial position, results of operations or cashflows.

          SECTION 3.17. CERTAIN EXISTING AGREEMENTS.  Except as disclosed in any
document  or  report  filed by the  Issuer  with  the  Securities  and  Exchange
Commission  or on  SCHEDULE  3.17  hereto,  as of the date  hereof and as of the
Closing Date: (i) there are and will be no agreements providing for encumbrances
or  restrictions  that  would  be  grandfathered  under  Section  XI(C)  of  the
Certificate  of  Designations,   (ii)  there  is  and  will  be  no  outstanding
Indebtedness  that  would  be  grandfathered   under  Section  XI(A)(a)  of  the
Certificate of Designations,  and (iii) there are and will be no agreements with
any Affiliate (as defined in the Certificate of Designations) or any stockholder
agreements  (including   registration  rights  agreements  or  related  purchase
agreements)  that  would  be  grandfathered  pursuant  to  Section  XI(E) of the
Certificate of Designations.

          SECTION 3.18. FINANCIAL  INFORMATION.  (a) The Issuer has furnished to
the Purchaser the audited consolidated  financial statements of the Issuer dated
as of  December  31,  1998  and for  the  year  then  ended,  and the  unaudited
consolidated  financial  statements  for the fiscal quarter ended March 31, 1999
(collectively,   the  "FINANCIALS").   The  Financials  have  been  prepared  in
accordance  with GAAP  applied  on a basis  consistent  with  that of  preceding
periods and are complete and correct in all material  respects.  The  Financials
fairly represent the Issuer's consolidated financial position as of the dates of
the balance sheets  included in the Financials and its  consolidated  results of
operations for the periods  indicated  therein.  There are no omissions from the
Financials or any other facts or  circumstances  not reflected in the Financials
which are or may be material according to GAAP.

                                       11
<PAGE>

          (b) Except as and to the extent expressly set forth in the Financials,
or the notes,  schedules or exhibits  thereto,  or as disclosed in the documents
filed by the Issuer with the Securities and Exchange Commission, (i) as of March
31, 1999 (the "BALANCE SHEET DATE"), neither the Issuer nor its Subsidiaries had
any material liabilities or obligations (whether absolute,  contingent,  accrued
or otherwise) that would be required to be included on a balance sheet or in the
notes,  schedules or exhibits  thereto  prepared in accordance  with GAAP,  (ii)
since the Balance Sheet Date, the Issuer and its Subsidiaries  have not incurred
any such material  liabilities or obligations other than in the normal course of
business  and (iii) since  December 31,  1998,  no event has  occurred  that has
resulted in or is reasonably likely to result in a Material Adverse Effect.

          SECTION 3.19.  DISCLOSURE.  The Issuer has provided the Purchaser with
disclosure  about its and its  Subsidiaries'  business that in the aggregate did
not contain an untrue  statement of a material  fact or omit to state a material
fact necessary to make the statements in such disclosure not misleading.

          SECTION  3.20.  INVESTMENT  COMPANY  ACT. The Issuer is not, and after
giving effect to the offering and sale of the Securities and the  application of
the  proceeds  thereof  will not be,  an  "investment  company"  as such term is
defined in the Investment Company Act of 1940, as amended.

          SECTION 3.21.  BROKERS.  No brokerage or finder's  commissions or fees
are payable in connection with the transactions  contemplated by this Agreement,
and the Issuer shall defend,  indemnify and hold the Purchaser harmless from and
against  any  liability,   loss  or  expense  (including,   without  limitation,
reasonable  attorneys  fees) arising in  connection  with any claim for any such
commissions.

                                   ARTICLE IV

                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

          The Purchaser represents and warrants to the Issuer as follows:

          SECTION 4.01.  ORGANIZATION.  It is duly  organized and existing under
the laws of its jurisdiction of organization.


          SECTION 4.02. AUTHORITY; NO OTHER ACTION. (a) The execution,  delivery
and  performance  of  this  Agreement,   the  Warrant  Agreement,   the  Warrant
Registration  Rights  Agreement  and the  Preferred  Stock  Registration  Rights
Agreement are within its powers and have been duly authorized on its part by all
requisite corporate action.

          (b) No action by or in respect of, or filing  with,  any  governmental
authority,  agency or official  is  required  for the  execution,  delivery  and
performance  by the  Purchaser of this  Agreement,  the Warrant  Agreement,  the
Warrant Registration Rights Agreement or the Preferred Stock Registration Rights
Agreement.


                                       12
<PAGE>

          SECTION 4.03. NO CONFLICT. The execution,  delivery and performance by
it of this Agreement,  the Warrant Agreement,  the Warrant  Registration  Rights
Agreement  and  the  Preferred  Stock  Registration  Rights  Agreement  and  the
consummation of the transactions contemplated hereby and thereby do not and will
not (i) violate its charter, bylaws or similar organizational  documents or (ii)
violate any applicable law, rule,  regulation,  judgment,  injunction,  order or
decree,  which violation  would (a) affect the validity of this  Agreement,  the
Warrant Agreement,  the Warrant  Registration  Rights Agreement or the Preferred
Stock  Registration  Rights  Agreement or (b)  individually  or in the aggregate
impair the  ability of the  Purchaser  to perform in any  material  respect  the
obligations  which it has under  this  Agreement,  the  Warrant  Agreement,  the
Warrant Registration Rights Agreement or the Preferred Stock Registration Rights
Agreement.

          SECTION 4.04. BINDING EFFECT.  This Agreement,  the Warrant Agreement,
Warrant  Registration  Rights  Agreement  and the Preferred  Stock  Registration
Rights  Agreement have been duly  authorized,  executed and delivered by it and,
except  as  limited  by  applicable  bankruptcy,   insolvency,   reorganization,
moratorium  and similar laws  affecting the  enforcement  of  creditors'  rights
generally and by general principles of equity (whether  enforcement is sought by
proceedings in equity or at law), constitute valid and binding agreements of the
Purchaser enforceable in accordance with their respective terms.

          SECTION  4.05.  NO  DEFAULTS.  It is not in  violation of its charter,
bylaws or similar organizational  documents or in default under any provision of
applicable law or regulation or of any agreement,  judgment,  injunction, order,
decree or other instrument binding upon it, which violation or default (i) would
affect the  validity  of this  Agreement,  the  Warrant  Agreement,  the Warrant
Registration  Rights  Agreement  or  the  Preferred  Stock  Registration  Rights
Agreement or (ii) would (individually or in the aggregate) impair the ability of
the Purchaser to perform in any material  respect the  obligations  which it has
under this Agreement,  the Warrant Agreement,  the Warrant  Registration  Rights
Agreement or the Preferred Stock Registration Rights Agreement.

          SECTION  4.06.  PRIVATE  PLACEMENT.  (a) It  understands  that (i) the
offering and sale of the  Securities is intended to be exempt from  registration
under the Securities Act pursuant to Section 4(2) of the Securities Act and (ii)
there is no existing  public or other market for any of the Securities and there
can be no assurance  that it will be able to sell or dispose of such  Securities
purchased by it pursuant to this Agreement.

          (b)  It is an  "Accredited  Investor"  as  such  term  is  defined  in
Regulation D.

          (c) It has  sufficient  knowledge  and  experience  in  financial  and
business  matters so as to be capable of evaluating  the merits and risks of its
investment in the  Securities and it is capable of bearing the economic risks of
such investment, including a complete loss of its investment in the Securities.

          (d) It has had access to the  management and records of the Issuer and
has been  furnished  with all the  information  that it has  requested  from the
Issuer for determining whether to purchase the Securities and has been given the
opportunity  to ask  questions of, and receive  answers from,  management of the
Issuer  regarding  its  business  and  affairs  and  concerning  the  terms  and
conditions of the Securities and other related matters.


                                       13
<PAGE>

          (e) It understands  that the Securities and the shares of Common Stock
issuable  upon  exercise  of  the  Warrants  are  characterized  as  "restricted
securities"  under  the  federal  securities  laws  inasmuch  as they are  being
acquired  from the Issuer in a transaction  not involving a public  offering and
that under such laws and applicable  regulations  such  securities may be resold
without   registration   under  the  Securities  Act  only  in  certain  limited
circumstances.  In this  connection,  it represents that it is familiar with SEC
Rules  144 and  144A,  as  presently  in  effect,  and  understands  the  resale
limitations imposed thereby and by the Securities Act.



                                    ARTICLE V

                         CONDITIONS PRECEDENT TO CLOSING


          SECTION  5.01.   CONDITIONS  TO  THE  PURCHASER'S   OBLIGATIONS.   The
obligation  of the  Purchaser to purchase the  Securities  to be purchased by it
hereunder is subject to the  satisfaction,  on or prior to the Closing  Date, of
the following conditions:

          (a) each of the representations and warranties of the Issuer contained
     herein shall be true and correct in all material respects on and as of such
     Closing Date and the Purchaser shall have received a certificate  attesting
     thereto signed by the President or a Vice President of the Issuer;

          (b) there shall not have occurred and there shall not otherwise  exist
     any  condition,  event or  development  having,  or  likely to have (in the
     reasonable judgment of the Purchaser), a Material Adverse Effect;

          (c) the  Purchaser  shall have  received  an opinion  from  Shearman &
     Sterling, special counsel to the Issuer, and an opinion from Kelley, Drye &
     Warren LLP,  counsel to the Issuer,  each dated the Closing  Date,  in form
     reasonably satisfactory to the Purchaser;

          (d) the  Secretary or an Assistant  Secretary of the Issuer shall have
     delivered to the  Purchaser at the Closing Date a  Certificate  dated as of
     the  Closing  Date  certifying:  (i) that  attached  thereto  is a true and
     complete  copy of the bylaws of the Issuer as in effect on the date of such
     certification;  (ii) that  attached  thereto is a true and complete copy of
     all resolutions adopted by the Board of Directors of the Issuer authorizing
     the  execution,  delivery and  performance of this  Agreement,  the Warrant
     Agreement,  the Warrant Registration Rights Agreement,  the Preferred Stock
     Registration Rights Agreement, the Certificates of Amendment, Amendment No.
     5, the  issuance,  sale and delivery of the  Securities,  and that all such
     resolutions  are in full  force  and  effect  and  are all the  resolutions
     adopted in connection with the transactions contemplated by this Agreement,
     the Warrant Agreement,  the Warrant  Registration  Rights Agreement and the
     Preferred Stock  Registration  Rights Agreement (iii) that attached thereto
     is a true and complete copy of all resolutions  adopted by the stockholders
     of the Issuer  approving the amendments to the Certificates of Designations
     and  authorizing  the filing of the  Certificates  of Amendment;  (iv) that
     attached thereto is a true and complete copy of the Charter as in effect on
     the date of such  certification;  and (v) to the  incumbency  and  specimen
     signature of certain officers of the Issuer;

                                       14
<PAGE>

          (e) all corporate and other  proceedings  to be taken by the Issuer in
     connection  with  the  transactions  contemplated  by this  Agreement,  the
     Warrant Agreement, the Warrant Registration Rights Agreement, the Preferred
     Stock Registration  Rights Agreement and Amendment No. 5, and all documents
     reflecting or evidencing such proceedings shall be reasonably  satisfactory
     in scope,  form and substance to the Purchaser and its legal  counsel,  and
     the  Purchaser  and its legal  counsel  shall have  received  all such duly
     executed  counterpart  originals  or  certified  or  other  copies  of such
     documents and instruments as they may reasonably request.

          (f) the Purchaser shall have received duly executed and  authenticated
     certificates  representing the Series E Unit being purchased by it pursuant
     hereto;

          (g) the  Certificates of Amendment shall have been duly filed with the
     Secretary of State of Delaware and shall be in full force and effect;

          (h) the Purchaser shall have received the Warrant  Registration Rights
     Agreement duly executed by the Issuer;

          (i) the Purchaser shall have received the Preferred Stock Registration
     Rights Agreement duly executed by the Issuer;

          (j) the Purchaser shall have become an Additional  Purchaser under the
     Existing  Warrant  Agreement for the purpose of receiving  30,844  warrants
     thereunder;

          (k) the Existing Warrant  Agreement shall have been amended to provide
     for the issuance to the Purchaser,  unless certain conditions are met, of a
     number of Springing  Warrants equal to (1) 227,273 plus the total number of
     Warrants  held  by  the  Purchaser  on the  date  hereof,  multiplied  by a
     fraction,  the  numerator  of  which  shall  be the  aggregate  liquidation
     preference of the Purchaser's  Preferred Stock and the denominator of which
     shall be the aggregate liquidation  preference of all outstanding shares of
     Series E Preferred  Stock and Series F Preferred  Stock on the date hereof,
     LESS (2) the number of Warrants  held by the  Purchaser on the date hereof;
     and

          (l) the Issuer shall have paid to the  Purchaser  all fees and expense
     reimbursements  required  to be so paid on or  prior  to the  Closing  Date
     pursuant to the terms of this  Agreement or the fee letters being  executed
     and  delivered  concurrently  with  the  execution  and  delivery  of  this
     Agreement.

          SECTION 5.02. CONDITIONS TO ISSUER'S  OBLIGATIONS.  The obligations of
the Issuer to issue and sell the  Securities to the  Purchaser  pursuant to this
Agreement are subject to the  satisfaction,  at or prior to the Closing Date, of
the following conditions:

          (a) the  representations  and  warranties of the  Purchaser  contained
     herein shall be true and correct in all material  respects on and as of the
     Closing Date;

                                       15
<PAGE>

          (b) the Issuer shall have received from the Purchaser by wire transfer
     (of immediately  available funds) to an account designated by the Issuer in
     writing  delivered  to the  Purchaser,  the  consideration  referred  to in
     Section 2.01;

          (c) the Purchaser shall have become an Additional  Purchaser under the
     Existing Warrant Agreement; and

          (d) the  Certificates of Amendment shall have been duly filed with the
     Secretary of State of Delaware and shall be in full force and effect.

                                   ARTICLE VI

                                    COVENANTS

          SECTION 6.01. COVENANTS OF THE ISSUER.

          (a)  ANNOUNCEMENTS.  No  party or any  Affiliate  (as  defined  in the
Certificate of Designations),  officer or agent of the parties hereto shall make
any  announcement  concerning the transactions  contemplated  hereby without the
other parties' consent,  which consent may be withheld in their sole discretion;
provided,  however, that any party or such Affiliate,  officer or agent may make
any  announcements  required  by  applicable  law so  long  as the  text of such
announcement  shall have been provided to the parties hereto prior to the making
of such announcement.  The parties agree to consult with each other with respect
to announcements concerning the transactions contemplated hereby.

          (b)  SECURITIES.  The Issuer hereby  covenants that from and after the
date hereof and so long as the Purchaser owns any Securities, the Issuer shall:

          (i)  EXCHANGE OF  CERTIFICATES.  Upon  surrender  by the holder of any
certificates  representing  Securities  (or  securities  issued  upon  exchange,
conversion or exercise  thereof) for exchange or reissuance at the office of the
Issuer,  cause to be  issued  in  exchange  therefor  new  certificates  in such
denomination or  denominations as may be requested for the same aggregate number
of  Securities  (or  securities  issued upon  exchange,  conversion  or exercise
thereof)  represented by the  certificates so surrendered and registered as such
holder may request, subject to the provisions thereof.

          (ii)  REPLACEMENT  OF  CERTIFICATES.  Upon  receipt  by the  Issuer of
evidence reasonably satisfactory to it of loss, theft, destruction or mutilation
of any certificate  evidencing any of the Securities (or securities  issued upon
exchange,  conversion  or  exercise  thereof),  and (in case of  loss,  theft or
destruction) of indemnity  reasonably  satisfactory to the Issuer,  and upon the
surrender and cancellation of such certificate,  if mutilated,  the Issuer shall
make and deliver in lieu of such certificate a new certificate for the number of
Securities (or securities issued upon exchange, conversion or exercise thereof),
as the case may be,  evidenced  by such lost,  stolen,  destroyed  or  mutilated
certificate  which remains  outstanding.  The  Purchaser's  (which term does not
include any successors or assigns of the Purchaser) agreement of indemnity shall
constitute indemnity satisfactory to the Issuer for the purposes of this Section
6.01(b) without the need of any further surety or bond.

                                       16
<PAGE>

          (iii) GOVERNMENT AND OTHER  APPROVALS.  Promptly  prepare,  submit and
file with all public and governmental  authorities,  all applications,  notices,
registrations,  certificates,  statements and such other information,  documents
and instruments as may be required  pursuant to any federal,  state or local law
or rule or regulation of the National Association of Securities Dealers, Inc. or
any securities exchange, in connection with the consummation of the transactions
contemplated by this Agreement,  including the effect of any dividends, exchange
or conversion rights,  anti-dilution provisions or Board control contemplated by
the terms of the  Securities  or other  securities  of the  Issuer  which may be
acquired by the Purchaser  pursuant to this Agreement.  The Issuer shall use its
best efforts to obtain any necessary consents or approvals from any authority in
connection  with  the  consummation  of the  transactions  contemplated  by this
Agreement, including the effect of any dividends, exchange or conversion rights,
anti-dilution  provisions  or Board  control  contemplated  by the  terms of the
Securities.

          (c) ACCESS AND CONFIDENTIALITY.  Prior to the Closing Date, the Issuer
shall (and shall cause each of its Subsidiaries to) afford the Purchaser and its
representatives   reasonable   access  during  normal   business  hours  to  its
properties,  books,  contracts  and records and  personnel  and advisors and the
Issuer shall (and shall cause each of the  Subsidiaries  to) furnish promptly to
the Purchaser all information  concerning its business  properties and personnel
as the Purchaser or its representatives  may reasonably  request,  provided that
any review will be conducted in a way that will not interfere  unreasonably with
the conduct of the Issuer's business.

          (d)  REPORTS  TO  HOLDERS.  At all  times,  upon  the  request  of the
Purchaser so long as the Purchaser owns any Securities,  the Issuer shall supply
to the  Purchaser  such  financial  and other  information  as the Purchaser may
reasonably  determine to be necessary  in order to permit  compliance  with Rule
144A in connection with a resale or a proposed resale of any of the Securities.

          (e)  RESERVATION  OF SERIES E PREFERRED  STOCK.  Issuer  shall use its
reasonable  best  efforts  within one year after the  Closing  Date to amend its
Charter to increase the number of  authorized  shares of the Issuer's  preferred
stock and amend the  Certificate  of  Designations  in order to provide  for the
reservation of, and the Issuer hereby agrees to reserve,  a sufficient number of
authorized  but unissued  shares of Series E Preferred  Stock to provide for the
payment of all  dividends  that may  accrue on the shares of Series E  Preferred
Stock (including the Preferred  Stock) then outstanding in additional  shares of
Series E Preferred Stock.


                                   ARTICLE VII

                                  MISCELLANEOUS


          SECTION 7.01. NOTICES. All notices,  requests and other communications
to any party  hereunder  shall be in writing  (including  telecopier  or similar
writing) and shall be given to such party by  certified  first class mail at its
address with a return receipt requested, by Federal Express or similar overnight


                                       17
<PAGE>

mail  service  with  signature  required  for  receipt,  or by  telecopy  at the
telecopier  number set forth below or such other address or telecopier number as
such  party may  hereinafter  specify in  writing  for the  purpose to the party
giving such notice.  Each such notice,  request or other  communication shall be
effective  (i) if given by telecopy,  when such telecopy is  transmitted  to the
telecopy  number  specified  in  this  Section  and the  appropriate  electronic
confirmation  is received  and a copy of such notice is sent by  overnight  mail
service  or (ii) if given by mail or  overnight  courier,  72 hours  after  such
communication  is  deposited  in the mails with first class  postage  prepaid or
given to overnight courier service, addressed as aforesaid.

                  Issuer:      KMC Telecom Holdings, Inc.
                               1545 Route 206, Suite 300
                               Bedminster NJ 07921
                               Attn: James D. Grenfell
                                     Chief Financial Officer
                               Fax: (908) 719-8776

                  Purchaser:   First Union Investors, Inc.
                               1 First Union Center,
                               5th Floor
                               301 South College
                               Charlotte, NC  28288
                               Attn: L. Watts Hamrick, III
                               Fax:  (704) 374-6711


          SECTION 7.02. NO WAIVERS. No failure or delay on the part of any party
in exercising any right, power or privilege  hereunder shall operate as a waiver
thereof,  nor shall any single or partial exercise thereof preclude any other or
further exercise thereof or the exercise of any other right, power or privilege.
The rights and remedies herein provided shall be cumulative and not exclusive of
any rights or remedies provided by law.

          SECTION  7.03.  SUCCESSORS  AND ASSIGNS.  The Purchaser may assign its
rights  hereunder  without the consent of the Issuer to any transferee of any of
the  Securities.  Otherwise,  no party to this  Agreement  may assign any of its
rights or  obligations  hereunder  to any person  except with the prior  written
consent of the other  parties  hereto  (which  consent  may not be  unreasonably
withheld). This Agreement shall be binding upon the Issuer and the Purchaser and
their respective successors and assigns.

          SECTION 7.04.  NEW YORK LAW. This  Agreement  shall be governed by the
laws of the State of New York.

          SECTION  7.05.  COUNTERPARTS;  EFFECTIVENESS.  This  Agreement  may be
executed in any number of  counterparts  each of which shall be an original with
the same  effect as if the  signatures  thereto  and  hereto  were upon the same
instrument.  This Agreement shall become  effective when each party hereto shall
have received a counterpart hereof signed by the other hereto.

                                       18
<PAGE>

          SECTION 7.06. ENTIRE AGREEMENT. This Agreement, the Warrant Agreement,
the Warrant  Registration  Rights  Agreement,  the Preferred Stock  Registration
Rights  Agreement,  Amendment  No. 5, the fee letters and the other side letters
being  executed and  delivered  concurrently  with the execution and delivery of
this   Agreement,   the   Certificates  of  Amendment  and  the  Certificate  of
Designations  constitute the entire  agreement and  understanding of the parties
hereto in respect of the subject matter contained herein and therein,  and there
are  no  restrictions,  promises,  representations,  warranties,  covenants,  or
undertakings  with  respect  to the  subject  matter  hereof,  other  than those
expressly  set forth or referred to herein or therein.  This  Agreement  and the
documents  referred to in the preceding  sentence supersede all prior agreements
and understandings between the parties hereto with respect to the subject matter
hereof.

          SECTION 7.07. EXPENSES.  Whether or not the transactions  contemplated
in this Agreement  shall be  consummated,  the Issuer shall pay the  Purchaser's
reasonable  out-of-pocket  expenses  on demand  arising in  connection  with the
execution and delivery of this  Agreement,  the Warrant  Agreement,  the Warrant
Registration   Rights  Agreement,   the  Preferred  Stock  Registration   Rights
Agreement, Amendment No. 5, the Certificates of Amendment and the Certificate of
Designation (collectively,  the "Transaction Documents") and the purchase of the
Securities,  including, without limitation: (i) the reasonable fees and expenses
of counsel to the Purchaser in connection  with the  preparation and negotiation
of  the  Transaction   Documents  and  the   consummation  of  the  transactions
contemplated  therein,  and  (ii)  costs  and  expenses,   including  reasonable
attorneys  fees and expenses  and the fees and expenses of any other  special or
financial advisors,  incurred in connection with any bankruptcy or insolvency of
the Issuer or in  connection  with any  workout or  restructuring  of any of the
transactions  contemplated in the Transaction Documents.  The obligations of the
Issuer  under  this  Section  7.07  shall  survive  any  transfer  of any of the
Securities by the Purchaser or any subsequent holder thereof.


                                       19
<PAGE>

          IN WITNESS WHEREOF,  the parties have caused this Agreement to be duly
executed, as of the day and year first above written.


                                       KMC Telecom Holdings, Inc


                                       By:   /s/ James D. Grenfell
                                          --------------------------------------
                                          Name:   James D. Grenfell
                                          Title:  Chief Financial Officer



                                       First Union Investors, Inc.


                                       By:   /s/ Pearce Landry
                                          --------------------------------------
                                          Name:  Pearce A. Landry
                                          Title: Vice President



                                       20
<PAGE>

                                    EXHIBIT A

                 Form of Certificate of Amendment to Certificate
                  of Designations of Series A Preferred Stock
























                                      A-1

<PAGE>

                                    EXHIBIT B

                 Form of Certificate of Amendment to Certificate
                  of Designations of Series C Preferred Stock

























                                      B-1

<PAGE>

                                    EXHIBIT C

                 Form of Certificate of Amendment to Certificate
                  of Designations of Series D Preferred Stock

























                                      C-1

<PAGE>

                                    EXHIBIT D

                 Form of Certificate of Amendment to Certificate
                  of Designations of Series E Preferred Stock

























                                      D-1

<PAGE>

                                    EXHIBIT E

                 Form of Certificate of Amendment to Certificate
                  of Designations of Series F Preferred Stock

























                                      E-1

<PAGE>

                                  Schedule 3.01

                  -------------------------------------------------------------


                                  Schedule 3.02

                  -------------------------------------------------------------


                                  Schedule 3.08

                  -------------------------------------------------------------


                                  Schedule 3.09

                  -------------------------------------------------------------

                                  Schedule 3.10

                  -------------------------------------------------------------


                                  Schedule 3.14

                  -------------------------------------------------------------


                                  Schedule 3.17

                  -------------------------------------------------------------


<PAGE>


                                  SCHEDULE 3.01

(A)  SUBSIDIARIES:
     -------------

     KMC Telecom Inc.
     KMC Telecom II, Inc.
     KMC Telecom III Holdings, Inc.
     KMC Telecom of Virginia, Inc. (wholly owned subsidiary of KMC Telecom Inc.)
     KMC Telecom Leasing I LLC (wholly owned subsidiary of KMC Telecom
     KMC Telecom Leasing II LLC (wholly owned subsidiary of KMC Telecom II,
     Inc.)
     KMC Telecom III, Inc. (wholly owned subsidiary of KMC Telecom  Holdings
     III, Inc.)
     KMC Telecom Leasing III LLC (wholly owned subsidiary of KMC Telecom III,
     Inc.)

(B)  LIENS, SECURITY INTERESTS, CHARGES, ENCUMBRANCES ON CAPITAL STOCK OF
     SUBSIDIARIES
     --------------------------------------------------------------------

     (1)  Pledge  Agreement  dated  December 22, 1998 by Issuer in favor of AT&T
          Commercial Finance  Corporation,  as Collateral Agent, with respect to
          the Capital Stock of KMC Telecom Inc. and KMC Telecom II, Inc.

     (2)  Pledge  Agreement dated December 22, 1998 by KMC Telecom Inc. in favor
          of AT&T Commercial  Finance  Corporation,  as Collateral  Agent,  with
          respect to one  hundred  percent  (100%) of the  Capital  Stock of KMC
          Telecom  of  Virginia,  Inc.  and one  hundred  percent  (100%) of the
          membership interests of KMC Telecom Leasing I LLC.

     (3)  Pledge  Agreement  dated  December 22, 1998 by KMC Telecom II, Inc. in
          favor of AT&T Commercial  Finance  Corporation,  as Collateral  Agent,
          with respect to one hundred percent (100%) of the membership interests
          of KMC Telecom Leasing II LLC.

     (4)  Pledge  Agreement  dated February 4, 1999 by KMC Telecom III Holdings,
          Inc.  in favor of the  Collateral  Agent (as  defined  therein),  with
          respect to one  hundred  percent  (100%) of the  Capital  Stock of KMC
          Telecom III, Inc.

     (5)  Pledge  Agreement  dated  February 4, 1999 by KMC Telecom III, Inc. in
          favor the Collateral Agent (as defined  therein),  with respect to one
          hundred  percent  (100%) of the  membership  interests  of KMC Telecom
          Leasing III LLC.

<PAGE>



                                  SCHEDULE 3.02
                                  -------------

(A)      HOLDERS OF COMMON STOCK
         -----------------------


         HOLDER                                           CURRENT SHARES
         ------                                           --------------

         Harold N. Kamine and family trusts                   573,835
         KMC Telecommunications L.P.                           40,000
         AT&T Credit Corporation                            203,288.5
         First Union National Bank                            6,917.5
         Nassau Capital Partners L.P.                          13,835
         D'Amico Family Partners, L.P.                         14,800


(B)  CONVERTIBLE SECURITIES

     (1)  Series A Preferred Stock is convertible into Common Stock.

     (2)  Series C Preferred Stock is convertible into Common Stock.

     (3)  Series F Preferred Stock is convertible into Series E Preferred Stock.



(C)  SUBSCRIPTION, OPTION, WARRANT RIGHTS

     (1)  Warrants  dated as of October  31,  1997  issued to  General  Electric
          Capital Corporation  ("GECC") currently  exercisable for 10,000 shares
          of Common Stock. (the "GECC WARRANTS")

     (2)  Warrants issued in connection with the Issuer's  January 29, 1998 High
          Yield Debt  Offering  exercisable  for 110,385  shares of Common Stock
          (the "HIGH YIELD WARRANTS")

     (3)  Options to  purchase  up to  262,500  shares of Common  Stock  granted
          pursuant to the Issuer's  1998 Stock  Purchase and Option Plan for Key
          Employees of KMC Telecom Holdings, Inc. and Affiliates.

     (4)  Warrants  issued  pursuant  to  the  Warrant  Agreement,  dated  as of
          February  4, 1999,  between the Issuer,  Newcourt  Commercial  Finance
          Corporation   ("Newcourt"),   Lucent   Technologies  Inc.   ("Lucent")
          (together, the "Purchasers"), and The Chase Manhattan Bank, as Warrant
          Agent,  exercisable for 18,226.76 shares of Common Stock, and 6,432.86
          shares of Common Stock, respectively (the "SERIES E & F WARRANTS").

<PAGE>

(D)  REPURCHASE RIGHTS, PUTS, VOTING RIGHTS, RIGHTS OF FIRST REFUSAL

     (1)  Amended and Restated Stockholders  Agreement,  dated as of October 31,
          1997 among Issuer,  Nassau Capital Partners L.P. ("Nassau  Capital") ,
          NAS  Partners  I,  L.L.C.  ("NAS"),  Harold  N.  Kamine  ("HNK"),  KMC
          Telecommunications LP, AT&T Credit Corporation, CoreStates Bank, N.A.,
          General Electric Capital Corporation ("GECC") and CoreStates Holdings,
          Inc., as amended (the "STOCKHOLDERS AGREEMENT") contains:

          (i)      put rights;
          (ii)     agreements as to voting;
          (iii)    rights of first refusal;
          (iv)     registration rights; and
          (v)      preemptive and/or anti-dilutive rights.

     (2)  The GECC Warrant contains preemptive and/or anti-dilutive rights.

     (3)  Amended and Restated Note Purchase and Investment  Agreement  dated as
          of October 22, 1996 by and among KMC Telecom Inc., Nassau Capital, NAS
          and HNK, as amended  through the Amendment  and  Assignment of Amended
          and  Restated  Note  Purchase  and  Investment  Agreement  dated as of
          September 22, 1997 by and among KMC Telecom Inc., Nassau Capital, NAS,
          HNK and the Issuer, as amended (the "Investment  Agreement")  contains
          preemptive and/or anti-dilutive rights.

(4) The High Yield Warrants contain preemptive and/or  anti-dilutive  rights and
registration rights.

     (5)  The  Warrant  Agreement,  dated as of January  29,  1998,  between the
          Issuer and The Chase Manhattan Bank, as Warrant Agent,  and applicable
          to the High  Yield  Warrants  (the  "High  Yield  Warrant  Agreement")
          contains certain anti-dilutive rights.

     (6)  The Warrant  Registration  Rights  Agreement,  dated as of January 26,
          1998,  between the Issuer and Morgan  Stanley & Co.  Incorporated  and
          applicable to the High Yield Warrants contains registration rights.

     (7)  The  Warrant  Agreement,  dated as of  February  4, 1999,  between the
          Issuer, Newcourt Commercial Finance Corporation  ("Newcourt"),  Lucent
          Technologies Inc.  ("Lucent")  (together,  the "Purchasers"),  and The
          Chase Manhattan Bank, as Warrant Agent, and applicable to the Series E
          & F Warrants (the "Series E & F Warrant  Agreement")  contains certain
          anti-dilutive rights.

     (8)  The Warrant  Registration  Rights  Agreement,  dated as of February 4,
          1999, between the Issuer,  Newcourt,  and Lucent and applicable to the
          Series E & F Warrants contains registration rights.

     (9)  The Series A Preferred Certificate of Designations contains conversion
          rights, preemptive and/or anti-dilutive rights and voting rights.

     (10) The Series C Preferred Certificate of Designations contains conversion
          rights,   preemptive  and/or  anti-dilutive   rights,  voting  rights,
          redemption rights.

     (11) The Series E Preferred Certificate of Designations contains conversion
          rights,   preemptive  and/or  anti-dilutive   rights,  voting  rights,
          redemption rights.

     (12) The Series F Preferred Certificate of Designations contains conversion
          rights,   preemptive  and/or  anti-dilutive   rights,  voting  rights,
          redemption rights.

     (13) The Issuer's Amended and Restated Certificate of Incorporation.

<PAGE>



                                  SCHEDULE 3.08
                                  -------------


(A)      COMPLIANCE WITH LAWS
         --------------------

         NO EXCEPTIONS.


<PAGE>

                                  SCHEDULE 3.09
                                  -------------

(A)  LITIGATION

     I-NET

     By letter dated August 29, 1997, KMC Telecom Inc. (the "Company")  notified
     I-Net,  Inc.  ("I-NET") that the Company  considered I-NET to be in default
     under a Master  Telecommunications  System  Rollout  Agreement  dated as of
     October 1, 1996 (the "I-NET Agreement"), pursuant to which I-NET had agreed
     to manage  construction  of  telephone  systems  for the Company in several
     cities,  including the preparation of design plans and  specifications  for
     each system.  The Company  considered I-NET to be in default as a result of
     I-NET's  failure to provide  design  plans and  specifications  for several
     systems for which it had agreed to provide  such plans and  specifications,
     to properly  supervise  construction of the systems or to provide personnel
     with the  necessary  expertise  to manage  the  projects.  By letter  dated
     October 27, 1997, I-NET demanded payment of all amounts it alleged were due
     under the I-NET  Agreement and an alleged  related  agreement  (aggregating
     $4.1  million) and stated that it would invoke the  arbitration  provisions
     under the I-NET  Agreement if the parties  could not agree as to the amount
     due and payment  terms on or before  November  27,  1997.  By letter  dated
     December 1, 1997,  I-NET  extended its  deadline for reaching  agreement to
     December 15, 1997.  Although  the Company and I-NET  conducted  discussions
     they were  unable to reach an  agreement  and on  February  12,  1998,  the
     Company  received a demand for  arbitration  from Wang  Laboratories,  Inc.
     ("Wang"),  the successor to I-NET.  The demand seeks at least $4.1 million.
     The Company believes that it has meritorious  defenses to Wang's claims and
     has asserted counterclaims seeking in excess of $2.5 million as a result of
     I-NET's defaults under the I-NET Agreement. The arbitration proceedings are
     currently  under way. The Company  believes that  resolution of this matter
     will not have a material  adverse  impact on its  financial  condition.  No
     assurance  can be given,  however,  as to the ultimate  resolution  of this
     matter.

     U S WEST Communications, Inc.

     In May  1997,  KMC  Telecom  Inc.  ("KMC")  and U S WEST  entered  into  an
     agreement to interconnect  their telephone systems so that KMC could supply
     local  telephone  service to customers in selected areas of Minnesota.  KMC
     and U S WEST submitted  their agreement to the Minnesota  Public  Utilities
     Commission ("PUC") for approval. As a condition of approving the agreement,
     the Public Utilities  Commission required that the agreement be modified in
     three ways: (1) elimination of a provision stating that a customer that was
     in arrears on payment to one company could not retain the same phone number
     if it switched its service to another company;  (2) addition of a provision
     requiring U S WEST to get permission  from the PUC before  terminating  the
     interconnection  with KMC; and (3) addition of a provision  specifying that
     KMC must give a ten day notice to its customers prior to terminating  their
     service.  Using the procedure required under federal law, U S WEST appealed
     the PUC's decision by filing a lawsuit in federal district

<PAGE>

                                  SCHEDULE 3.09
                                  -------------
                                   (CONTINUED)


     court in Minneapolis, Minnesota, naming both the PUC and KMC as defendants.
     KMC is  merely a  nominal  defendant  in this  action  and has not  taken a
     position  on  any of the  issues  on  appeal,  and  it is  local  counsel's
     understanding   that  KMC  believes  that  the  ultimate  outcome  of  this
     litigation  will  not  have a  significant  effect  on  KMC's  business  in
     Minnesota.

     MFS Communications Company

     KMC Telecom Inc.'s ("KMC") interconnection agreement with U S WEST is based
     upon U S WEST's  virtually  identical  interconnection  agreement  with MFS
     Communications  Company ("MFS"; now owned by MCI WorldCom),  which U S WEST
     has  appealed to the federal  district  court in  Minneapolis  for judicial
     review in a parallel lawsuit.  KMC's agreement provides that any changes in
     MFS' agreement necessitated by the outcome of the MFS appeal may need to be
     made  to the KMC  agreement.  U S WEST  asserts  in its  appeal  of the MFS
     agreement that the Minnesota Public Utilities Commission erred in approving
     contract provisions  allegedly violating the  Telecommunications  Act that:
     (1) set an interim rate for purchase of U S WEST unbundled loops; (2) set a
     rate for transport and  termination  of local  exchange  telecommunications
     traffic;  (3)  establish  a method  for cost  recovery  of  interim  number
     portability  services;  (4) compel U S WEST to recombine  unbundled network
     elements   for   competitor   purchase;   (5)  allow  a  single   point  of
     interconnection  between carriers; and (6) set a discount for purchase of U
     S WEST wholesale  services.  KMC cannot quantify at this time the potential
     effect of a successful U S WEST  challenge  to MFS'  agreement.  Should U S
     WEST prevail in its lawsuit against MFS, KMC may be compelled to modify its
     own  agreement  with U S WEST  and,  as a  result,  pay  more  for U S WEST
     interconnection  and services,  which could have an adverse effect on KMC's
     operations in Minnesota.

     Alabama Directional Boring, Inc.

     On May 1, 1998,  the Company  received a Complaint  in ALABAMA  DIRECTIONAL
     BORING,  INC. V. KMC TELECOM INC.  (Madison  County,  Alabama) in which the
     plaintiff  alleged that KMC owes  $225,000  pursuant to a contract with the
     plaintiff to provide  directional  boring for the placement of  underground
     fiber optic cable.  Plaintiff also seeks punitive damages in an unspecified
     sum.  KMC has  served an Answer and the  parties  are  engaged in  document
     discovery.  On January 5, 1999, the Court issued a Scheduling and Mediation
     Order,  setting a trial date of August 16, 1999 and  requiring  non-binding
     mediation to occur prior to that date.  Given that  discovery  has not been
     completed,  we are unable to express an opinion as to the ultimate  outcome
     of this lawsuit.



<PAGE>



                                  SCHEDULE 3.09
                                  -------------
                                   (CONTINUED)

     Business Software Alliance

     On March 22, 1999 and April 5, 1999,  the  Company  received  letters  (the
     "Letters") from counsel for Business Software Alliance (the "BSA") alleging
     possible  instances of illegal  duplication of certain software  companies'
     proprietary  software  products and requesting that the Company conduct its
     own company-wide  investigation,  including an audit of the software on all
     of the  Company's  computers at all of its locations and proofs of purchase
     for that software.  By letters dated April 12, 1999 and April 26, 1999, the
     Company   advised   counsel  for  the  BSA  that  it  was  conducting  such
     investigation  and audit and  would  respond  in due  course.  The  Letters
     indicate  that 17 U.S.C.  Section  504  allows  the  recovery  of actual or
     statutory  damages;  that in the case of willful  infringement  a court has
     discretion to award statutory  damages up to $100,000 for each  copyrighted
     product that has been infringed;  and that attorneys' fees may be recovered
     by the  prevailing  party.  Because  the Company  continues  to conduct its
     investigation and audit, it is not in a position to determine the amount of
     liability to which it may be subject.

     Industry Lawsuits

     There are a number of  lawsuits  related to the  Telecommunications  Act of
     1996, decisions of the FCC related thereto and rules and regulations issued
     thereunder which may affect the rights,  obligations and business of ILECs,
     CLECs and other participants in the telecommunications industry in general,
     including the Company.



<PAGE>



                                  SCHEDULE 3.10
                                  -------------

(A)  LIENS ON PROPERTY

     (1)  Pursuant to a Loan and Security  Agreement,  dated  December 22, 1998,
          among KMC Telecom Inc., KMC Telecom II, Inc., KMC Telecom of Virginia,
          Inc.,  KMC  Telecom   Leasing  I  LLC,  KMC  Telecom  Leasing  II  LLC
          (collectively,  the  "Borrowers"),  the Lenders (as defined  therein),
          First Union  National  Bank,  as Agent,  and AT&T  Commercial  Finance
          Corporation,   as  Collateral  Agent  (the  "Newcourt  Facility")  the
          Borrowers  have granted to AT&T  Commercial  Finance  Corporation,  as
          Collateral Agent, a right of setoff against and a continuing  security
          in and to all of their  respective  tangible and  intangible  personal
          property, fixtures and real property leasehold and easement interests,
          whether  currently owned or acquired after December 22, 1998,  subject
          to certain exceptions.

     (2)  Pursuant  to a Loan and  Security  Agreement,  dated as of February 4,
          1999,  among KMC Telecom  III,  Inc.,  KMC Telecom  Leasing  III,  LLC
          (collectively,  the  "Borrowers"),  the Lenders (as defined  therein),
          Lucent  Technologies,  Inc., as Agent,  and the  Collateral  Agent (as
          defined therein) (the "Lucent  Facility"),  the Borrowers have granted
          to the  Collateral  Agent  (as  defined  therein),  a right of  setoff
          against and a  continuing  security in and to all of their  respective
          tangible and intangible personal property,  fixtures and real property
          leasehold and easement interests,  whether currently owned or acquired
          after February 4, 1999, subject to certain exceptions.

<PAGE>

                                  SCHEDULE 3.14
                                  -------------


(A)  ENVIRONMENTAL MATTERS

     NO EXCEPTIONS.


<PAGE>

                                  SCHEDULE 3.17
                                  -------------

(A)  ENCUMBRANCES AND RESTRICTIONS

     (1)  The Newcourt Facility.

     (2)  Guaranty dated December 22, 1998,  executed by Issuer in favor of AT&T
          Commercial  Finance  Corporation,  as Collateral Agent pursuant to the
          Newcourt Facility.

     (3)  The Lucent Facility.

     (4)  Guaranty dated February 4, 1999, executed by KMC Telecom III Holdings,
          Inc. in favor of the Collateral Agent (as defined), in connection with
          the Lucent Facility.

     (5)  Series A Preferred Certificate of Designations.

     (6)  Series C Preferred Certificate of Designations.

     (7)  Series E Preferred Certificate of Designations.

     (8)  Series F Preferred Certificate of Designations.


(B)  OUTSTANDING INDEBTEDNESS

     (1)  The Newcourt Facility.

     (2)  The Lucent Facility.

     (3)  Indebtedness  pursuant to the  Issuer's  January  1998 High Yield Debt
          Offering.

     (4)  Indebtedness  pursuant to the  Issuer's  February 4, 1999 Series E & F
          Senior,  Redeemable,  Exchangeable  PIK  Preferred  Stock and  Warrant
          transaction.

     (5)  Guaranty dated  December 22, 1998,  executed by the Issuer in favor of
          AT&T Commercial Finance Corporation, as Collateral Agent in connection
          with the Newcourt Facility.

     (5)  Guaranty  dated  February 4, 1999,  executed by the Issuer in favor of
          the  Collateral  Agent (as  defined),  in  connection  with the Lucent
          Facility.

     (6)  Guaranty dated February 4, 1999, executed by KMC Telecom III Holdings,
          Inc. in favor of the Collateral Agent (as defined), in connection with
          the Lucent Facility.


<PAGE>



                                  SCHEDULE 3.17
                                  -------------
                                   (CONTINUED)



(C)  AFFILIATE TRANSACTIONS

     (1)  Those   transactions  set  forth  in  the  section  entitled  "Certain
          Relationships and Related Transactions" to the Prospectus contained in
          that certain Amendment No. 2 to the Registration Statement on Form S-4
          of KMC Telecom Holdings, Inc., Registration No. 333-50475,  filed with
          the Securities and Exchange Commission on July 10,1998.

     (2)  The  Issuer  reimbursed  certain  affiliated   companies  for  certain
          administrative  services  provided to it by such affiliated  companies
          during 1998, and may continue to do so in future years.

     (3)  The Board of Directors has approved, and an agreement in principal has
          been reached, subject to finalization,  by which the Issuer has agreed
          to employ Harold N. Kamine as its Chairman of the Board at a salary of
          $450,000 per annum for a period of 3 years.

     (4)  The Board of Directors has approved, and an agreement in principal has
          been  reached,  subject  to  finalization,  to enter  into a  Services
          Agreement between the Issuer and KMC Services LLC, dated as of January
          1, 1999.

     (5)  Letter  Agreement dated November 5, 1998 between the Issuer and Kamine
          Aviation LLC.

     (6)  Pursuant  to an  agreement  among the  Issuer,  Nassau  and  Harold N.
          Kamine,  for 1998 Nassau received certain fees for financial  advisory
          services and as  compensation  for the Nassau  designees who served on
          the Issuer's Board of Directors.  The Board of Directors has approved,
          and  an  agreement  in  principal   has  been   reached,   subject  to
          finalization, to enter into a Financial Advisory Agreement pursuant to
          which  Nassau will be paid  $450,000 as a financial  advisory  fee for
          1999.

     (7)  Tax  Allocation  Agreement  dated as of  December  21,  1998 among the
          Issuer,  KMC  Telecom  Inc.,  KMC  Telecom  II,  Inc.,  KMC Telecom of
          Virginia,  Inc., KMC Telecom III, Inc., KMC Telecom Leasing I LLC, and
          KMC  Telecom  Leasing II LLC,  as amended  by  Amendment  No. 1 To Tax
          Allocation Agreement dated as of January 29, 1999.


<PAGE>


                                  SCHEDULE 3.17
                                  -------------
                                   (CONTINUED)


     (8)  Management  Agreement  dated as of December 18, 1998 among the Issuer,
          KMC Telecom Inc., KMC Telecom II, Inc., KMC Telecom of Virginia, Inc.,
          KMC Telecom  Leasing I LLC, KMC Telecom II Leasing LLC and KMC Telecom
          III, Inc., as amended by Amendment No. 1 To Management Agreement dated
          as of January 29, 1999.



                               AMENDMENT NO. 1 TO
                          SECURITIES PURCHASE AGREEMENT

          This  Amendment No. 1 to  Securities  Purchase  Agreement  dated as of
February 4, 1999 is made as of June 1, 1999 by KMC  Telecom  Holdings,  Inc.,  a
Delaware corporation (the "Issuer"),  Newcourt Commercial Finance Corporation, a
Delaware  corporation  ("Newcourt"),  and Lucent  Technologies  Inc., a Delaware
corporation  ("Lucent" and together with  Newcourt,  the  "Purchasers"  and each
individually, a "Purchaser") (the "Amendment").

                               W I T N E S S E T H

     WHEREAS, the Company,  Newcourt,  and Lucent have entered into a Securities
Purchase  Agreement  dated as of  February  4, 1999 (the  "February  4  Purchase
Agreement");

     WHEREAS,  Newcourt owns shares of the Company's  Series E Preferred  Stock,
and shares of the Company's  Series F Preferred Stock, and Lucent owns shares of
the Company's Series F Preferred Stock;

     WHEREAS,  the  Company,  First  Union  Investors,   Inc.  ("First  Union"),
Newcourt,  and  Lucent  are  parties  to  Amendment  No.  1 to  Preferred  Stock
Registration  Rights Agreement of even date herewith,  which grants First Union,
Newcourt,  and Lucent the right to register their Registrable  Securities at any
time and from time to time after October 30, 1999;

     NOW THEREFORE,  in consideration of the premises,  the parties hereto agree
as follows:

     1. DEFINED TERMS.  Unless otherwise  defined herein,  all capitalized terms
defined in the  Amendment and used herein are defined in the February 4 Purchase
Agreement.

     2. AMENDMENT TO SECTION 4.06(F). Section 4.06(f) of the February 4 Purchase
Agreement is amended to read in its entirety as follows:

          "Except as  otherwise  provided in  Amendment  No. 1 to the  Preferred
Stock  Registration  Rights Agreement dated as of June 1, 1999, by and among the
Company,  First Union,  Newcourt, and Lucent, in addition to the restrictions on
transfer imposed by federal or state  securities  laws,  Lucent hereby covenants
and agrees with the Issuer that it will not transfer, sell, assign or pledge all
or any part of the Securities purchased by it hereunder until the earlier of (i)
one year  after the date of any  future  issuance  and sale by the Issuer of any
high yield debt  securities  yielding  gross  proceeds to the Issuer of at least
$50,000,000 or (ii) August 4, 2000.  Notwithstanding the foregoing, the Series F
Preferred  Stock may be held by an Affiliate (as defined in the  "Certificate of
Designations") of Lucent that is under its control."

     3.  Except  as  expressly  amended  hereby,  all of the  provisions  of the
February 4 Purchase  Agreement  are hereby  affirmed and shall  continue in full
force and effect in accordance with their terms.


<PAGE>

     4. This  Amendment  shall be governed and construed in accordance  with the
laws of the State of New York  applicable to agreements made and to be performed
entirely  within,  such state,  without regard to the principles of conflicts of
laws thereof.

     5. This  Amendment  may be  executed in one or more  counterparts,  each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.


<PAGE>


Signature Page to
Amendment No. 1 to the
Securities Purchase
Agreement dated
February 4, 1999

     IN WITNESS  WHEREOF,  the parties  have caused  this  Amendment  to be duly
executed, as of the day and year first above written.


                                        KMC TELECOM HOLDINGS, INC.



                                        By: /s/ James D. Grenfell
                                           -------------------------------------
                                           Name: James D. Grenfell
                                           Title: Executive Vice President,
                                                  Chief Financial Officer

                                        NEWCOURT COMMERCIAL FINANCE
                                        CORPORATION


                                        By: /s/ John P. Sirico, II
                                           -------------------------------------
                                           Name: John P. Sirico, II
                                           Title: Vice President

                                        LUCENT TECHNOLOGIES, INC.


                                        By: /s/ Leslie L. Rogers
                                           -------------------------------------
                                           Name: Leslie L. Rogers
                                           Title: Managing Director


- --------------------------------------------------------------------------------
                                WARRANT AGREEMENT

                                      among

                           KMC TELECOM HOLDINGS, INC.

                                       and

                            THE CHASE MANHATTAN BANK,
                                as Warrant Agent

                                       and

                           FIRST UNION INVESTORS, INC.

                                       and

               HAROLD N. KAMINE and NASSAU CAPITAL PARTNERS L. P.
                           for purposes of Section 8.5


                           Dated as of April 30, 1999



- --------------------------------------------------------------------------------


<PAGE>

                                TABLE OF CONTENTS
                                                                            Page

ARTICLE I......................................................................2
CERTAIN DEFINITIONS............................................................2

ARTICLE II.....................................................................5
ORIGINAL ISSUE OF WARRANTS.....................................................5

   Section 2.1.  Form of Warrant Certificates..................................6
   Section 2.2.  Restrictive Legends...........................................6
   Section 2.3.  Execution and Delivery of Warrant Certificates................7
   Section 2.4. Springing Warrants.............................................8

ARTICLE III....................................................................8
EXERCISE PRICE AND EXERCISE OF WARRANTS........................................8

   Section 3.1.  Exercise Price................................................8
   Section 3.2.  Exercise; Restrictions on Exercise............................8
   Section 3.3.  Method of Exercise; Payment of Exercise Price.................8

ARTICLE IV....................................................................10
ADJUSTMENTS...................................................................10

   Section 4.1.  Adjustments..................................................10
   Section 4.2.  Notice of Adjustment.........................................16
   Section 4.3.  Statement on Warrants........................................17
   Section 4.4.  Notice of Consolidation, Merger, Etc.........................17
   Section 4.5.  Fractional Interests.........................................18
   Section 4.6.  When Issuance or Payment May Be Deferred.....................18
   Section 4.7.  Initial Public Offering......................................18

ARTICLE V.....................................................................18
DECREASE IN EXERCISE PRICE....................................................18

ARTICLE VI....................................................................19
LOSS OR MUTILATION............................................................19

ARTICLE VII...................................................................19
RESERVATION AND AUTHORIZATION.................................................19
OF COMMON SHARES..............................................................19

ARTICLE VIII..................................................................20
WARRANT TRANSFER BOOKS; RESTRICTIONS ON TRANSFER; CERTAIN TRANSFER RIGHTS.....20

   Section 8.1.  Transfer and Exchange........................................20
   Section 8.3.  Special Transfer Provisions..................................20
   Section 8.4.  Surrender of Warrant Certificates............................22
   Section 8.5.  Tag-Along Right..............................................22
   Section 8.6.  Bring Along Right............................................24

ARTICLE IX....................................................................25
WARRANT HOLDERS...............................................................25

   Section 9.1.  Warrant Holder Deemed Not a Shareholder......................25
   Section 9.2.  Right of Action..............................................25

ARTICLE X.....................................................................25
THE WARRANT AGENT.............................................................25

   Section 10.1.  Duties and Liabilities......................................25
   Section 10.2.  Right to Consult Counsel....................................27
   Section 10.3.  Compensation; Indemnification...............................27
   Section 10.4.  No Restrictions on Actions..................................27
   Section 10.5.  Discharge or Removal; Replacement Warrant Agent.............27
   Section 10.6.  Successor Warrant Agent.....................................28

ARTICLE XI....................................................................29
MISCELLANEOUS.................................................................29

   Section 11.1.  Monies Deposited with the Warrant Agent.....................29
   Section 11.2.  Payment of Taxes............................................29
   Section 11.3.  No Merger, Consolidation or Sale of Assets of the Company...29
   Section 11.4.  Reports to Holders..........................................29
   Section 11.5.  Notices; Payment............................................30
   Section 11.6.  Binding Effect..............................................31
   Section 11.7.  Counterparts................................................31
   Section 11.8.  Amendments..................................................31
   Section 11.9.  Headings....................................................32
   Section 11.10. Common Shares Legend.......................................32
   Section 11.11. Third Party Beneficiaries..................................33
   Section 11.12. Termination................................................33
   Section 11.13. Governing Law..............................................33



EXHIBIT A       FORM OF WARRANT CERTIFICATE

EXHIBIT B-1     FORM OF  CERTIFICATE  TO BE DELIVERED BY  TRANSFEROR  IN
                CONNECTION WITH TRANSFERS TO PERSONS OTHER THAN QIBs

EXHIBIT B-2     FORM OF CERTIFICATE TO BE DELIVERED BY TRANSFEREES IN CONNECTION
                WITH TRANSFERS TO PERSONS OTHER THAN QIBs

APPENDIX A      LIST OF FINANCIAL EXPERTS



<PAGE>

                                WARRANT AGREEMENT

          WARRANT  AGREEMENT,  dated as of April 30,  1999  (this  "AGREEMENT"),
among KMC TELECOM HOLDINGS,  INC., a Delaware  corporation (the "COMPANY"),  and
FIRST UNION INVESTORS,  INC., a North Carolina corporation (the "PURCHASER") and
The Chase  Manhattan  Bank, as warrant agent (the  "WARRANT  AGENT").  Harold N.
Kamine and Nassau  Capital  Partners L. P. are parties to this Agreement for the
purposes of Section 8.5.

                              W I T N E S S E T H:

          WHEREAS,  in connection with the sale of shares of its preferred stock
from time to time,  the  Company  intends to issue and sell  warrants  (each,  a
"WARRANT" and  collectively,  the "WARRANTS") to be issued under this Agreement,
each Warrant initially  entitling the holder thereof to purchase 0.471756 shares
of Common Stock (as defined  below) of the Company at an exercise  price of $.01
per Common Share (as defined below);

          WHEREAS,  pursuant to the terms of a Securities  Purchase Agreement of
even date  herewith  (the  "PURCHASE  AGREEMENT"),  between  the Company and the
Purchaser, the Company has agreed to issue and sell to the Purchaser a unit (the
"SERIES E UNIT"),  consisting of 35,000 shares of the Company's Series E Senior,
Redeemable,  Exchangeable  PIK Preferred Stock (the "SERIES E PREFERRED  STOCK")
and 94,513 Warrants;

          WHEREAS, the Series E Preferred Stock and the Warrants included in the
Series E Unit will become separately  transferable on the Business Day after the
date the Series E Unit is initially issued (the "SEPARATION DATE");

          WHEREAS, as described in Section 2.4 of the Existing Warrant Agreement
(as defined  below),  holders of Series E Preferred Stock and Series F Preferred
Stock are entitled to receive  227,273  warrants  unless certain  conditions are
satisfied;

          WHEREAS,  the  Company  has  previously  issued  shares  of  Series  E
Preferred  Stock,   shares  of  the  Company's  Series  F  Senior,   Redeemable,
Exchangeable PIK Preferred Stock (the "SERIES F PREFERRED STOCK"),  warrants and
springing warrants under a Securities Purchase Agreement dated as of February 4,
1999;

          WHEREAS, the Company desires to engage the Warrant Agent to act on the
Company's behalf, and the Warrant Agent desires to act on behalf of the Company,
in connection with the issuance of the Warrant  Certificates  (as defined below)
and the other matters as provided herein, including, without limitation, for the
purpose of defining the terms and  provisions of the Warrants and the respective
rights and obligations  thereunder of the Company and the record holders thereof
(together  with the  holders  of shares of  Common  Stock (or other  securities)
received upon exercise thereof, the "HOLDERS").


                                       1
<PAGE>

          NOW,  THEREFORE,  in  consideration of the foregoing and of the mutual
agreements  contained  herein and in the Purchase  Agreement,  the Company,  the
Purchaser and the Warrant Agent hereby agree as follows:

                                    ARTICLE I

                               CERTAIN DEFINITIONS

          "Affiliate" means, as applied to any Person, any other Person directly
or indirectly  controlling,  controlled  by, or under direct or indirect  common
control  with,  such  Person.   For  purposes  of  this  definition,   "control"
(including,  with correlative meanings, the terms "controlling," "controlled by"
and  "under  common  control  with"),  as  applied  to  any  Person,  means  the
possession,  directly  or  indirectly,  of the  power to  direct  or  cause  the
direction of the  management  and policies of such Person,  whether  through the
ownership of voting securities, by contract or otherwise.

          "Auditors" means, at any time, the independent auditors of the Company
at such time.

          "Board" means the board of directors of the Company from time to time.

          "Business  Day" means a day other  than a Saturday  or Sunday on which
commercial banks in The City of New York are open for business.

          "Buyout  Notice"  shall  have the  meaning  ascribed  to such  term in
Section 8.6.

          "Capital  Stock" shall mean capital  stock or share capital of, and/or
other equity  participations  in, the Company,  including,  without  limitation,
partnership interests,  and/or conversion privileges,  warrants,  options and/or
other rights to acquire such capital  stock,  share capital  and/or other equity
participations.

          "Certificate  for Surrender" means the form on the reverse side of the
Warrant Certificate substantially in the form included in Exhibit A hereto.

          "Closing Date" means April 30, 1999.

          "Commission"   means  the  United  States   Securities   and  Exchange
Commission.

          "Common Shares" means the shares of the Common Stock of the Company.

          "Common Stock" means the common stock,  par value $0.01 per share,  of
the Company.

                                       2
<PAGE>

          "Common Stock  Equivalents"  means any security or obligation which is
by its terms convertible into shares of Common Stock and any option,  warrant or
other subscription or purchase right with respect to Common Stock.

          "Company" has the meaning specified in the preamble to this Agreement.

          "Current  Market  Value" has the meaning  specified in Section  4.1(f)
hereof.

          "Exchange  Act" means the United  States  Securities  Exchange  Act of
1934, as amended.

          "Exercise Price" has the meaning specified in Section 3.1 hereof.

          "Existing  Stockholders" means those stockholders who are from time to
time parties to the  Stockholders  Agreement  dated as of October 31,  1997,  as
amended.

          "Existing  Warrant  Agreement" means the Warrant Agreement dated as of
February 4, 1999 among the Company,  Newcourt Commercial Finance Corporation and
Lucent Technologies Inc, as amended to date.

          "Expiration Date" means February 1, 2009.

          "Financial  Expert"  means one of the  Persons  listed in  Appendix  A
hereto.

          "Fully Diluted" or "Fully Diluted Basis" shall mean, at any date as of
which the number of shares of Common Stock is to be  determined,  such number of
shares  determined  on  a  basis  that  includes  all  shares  of  Common  Stock
outstanding  at such date and the  maximum  shares of Common  Stock  issuable in
respect  of  Common  Stock  Equivalents  (giving  effect  to  the  then  current
respective  conversion  prices)  and  other  rights  to  purchase  (directly  or
indirectly) shares of Common Stock or Common Stock  Equivalents,  outstanding on
such  date,  whether  or not  such  rights  to  convert,  exchange  or  exercise
thereunder are presently exercisable.

          "Holders" has the meaning specified in the recitals to this Agreement.

          "Independent  Financial Expert" means a Financial Expert that does not
(and whose  directors,  executive  officers and 5%  stockholders  do not) have a
direct or indirect  financial interest in the Company or any of its subsidiaries
or Affiliates, which has not been for at least five years and, at the time it is
called upon to give independent financial advice to the Company is not (and none
of  its  directors,  executive  officers  or 5%  stockholders  is)  a  promoter,
director,  or officer of the Company or any of its  subsidiaries  or Affiliates.
The  Independent  Financial  Expert may be  compensated  and  indemnified by the
Company for opinions or services it provides as an Independent Financial Expert.

                                       3
<PAGE>

          "Institutional  Accredited Investor" shall mean an institution that is
an "accredited investor" as that term is defined in Rule 501(a)(1),  (2), (3) or
(7) of Regulation D under the Securities Act.

          "Officer" means, with respect to the Company,  (i) the Chairman of the
Board,  the Vice  Chairman  of the Board,  the  President,  the Chief  Executive
Officer,  the Chief Operating Officer,  the Chief Financial Officer and (ii) the
Treasurer or any Assistant  Treasurer,  the Secretary or any Assistant Secretary
of the Company.

          "Officers'  Certificate"  means a  certificate  signed by one  Officer
listed in clause (i) of the definition  thereof and one Officer listed in clause
(ii) of the definition thereof; provided, however, that any such certificate may
be signed by any two of the  Officers  listed  in clause  (i) of the  definition
thereof  in lieu of being  signed by one  Officer  listed  in clause  (i) of the
definition  thereof  and one  Officer  listed in clause  (ii) of the  definition
thereof.

          "Opinion of Counsel" means a written  opinion signed by legal counsel,
who may be an employee of or counsel to the Company or an applicable Holder.

          "Person" means any individual, corporation, limited liability company,
partnership,  joint venture, trust,  unincorporated organization or other entity
or any government or any agency or political subdivision thereof.

          "Principal  Holders" means each of the following two groups (i) Nassau
Capital  Partners L.P and its general and limited partners and any Affiliates of
the  foregoing  and (ii) Harold N.  Kamine and his  parents,  siblings,  spouse,
descendants,  heirs and devisees, and any trust or Person the sole beneficiaries
or equity holders of which are the foregoing Persons.

          "Private  Placement  Legend" means the legend set forth on the Warrant
Certificates in the form set forth in Section 2.2 hereof.

          "Purchase Agreement" has the meaning specified in the recitals to this
Agreement.

          "Purchaser"  has  the  meaning  specified  in  the  recitals  to  this
Agreement.

          "QIB" means a "qualified institutional buyer" as defined in Rule 144A.

          "Right" has the meaning specified in Section 4.1(c) hereof.

          "Rule 144A" means Rule 144A under the Securities Act.

          "Securities  Act" means the United States  Securities  Act of 1933, as
amended.



                                       4
<PAGE>

          "Separation  Date" has the meaning  specified  in the recitals to this
Agreement.

          "Series E Preferred  Stock" has the meaning  specified in the recitals
to this Agreement.

          "Series E Unit" has the  meaning  specified  in the  recitals  to this
Agreement.

          "Series F Preferred  Stock" has the meaning  specified in the recitals
to this Agreement.

          "Spread" means,  with respect to any Warrant,  the last reported trade
price of the Common  Shares  issuable upon exercise of such Warrant at the close
of business on any Business Day on the principal exchange or quotation system on
which the Company's  Common Shares are listed,  less the Exercise  Price of such
Warrant, as adjusted as provided herein.

          "Springing Warrants means the warrants which may be issued pursuant to
Section 2.4 of the Existing Warrant Agreement.

          "Subscription  Form" means the form on the reverse side of the Warrant
Certificate substantially in the form included in Exhibit A hereto.

          "Tag-Along  Notice"  shall have the  meaning  ascribed to such term in
Section 8.5.

          "Tag-Along  Purchaser" shall have the meaning ascribed to such term in
Section 8.5.

          "Tag-Along  Shares"  shall have the  meaning  ascribed to such term in
Section 8.5.

          "Third Party  Purchaser"  shall have the meaning ascribed to such term
in Section 8.6.

          "Transfer Agent" means Chase Mellon Shareholder Services,  L.L.C., the
transfer agent for the Series E Preferred Stock, and its successors and assigns,
or as  appointed  by the  Company  which in no event  shall be the Company or an
Affiliate of the Company.

          "Underlying  Securities"  shall  mean  the  Common  Shares  (or  other
securities) issuable upon exercise of the Warrants.

          "Value Report" has the meaning specified in Section 4.1(k) hereof.

          "Warrants"  has  the  meaning   specified  in  the  recitals  to  this
Agreement, including the Springing Warrants.

          "Warrant  Agent" has the  meaning  specified  in the  preamble to this
Agreement.



                                       5
<PAGE>

          "Warrant  Certificates"  has the  meaning  specified  in  Section  2.1
hereof.

          "Warrant Registration Rights Agreement" means the Warrant Registration
Rights Agreement, of even date herewith, between the Company and the Purchaser.

          "Warrant Registration  Statement" means a shelf registration statement
on the  appropriate  form which  will be filed by the  Company  pursuant  to the
Warrant Registration Rights Agreement.

                                   ARTICLE II

                           ORIGINAL ISSUE OF WARRANTS

          SECTION 2.1. FORM OF WARRANT CERTIFICATES.  Certificates  representing
the Warrants (the "WARRANT  CERTIFICATES")  shall be  substantially  in the form
attached  hereto as Exhibit  A,  shall be dated the date on which  such  Warrant
Certificates  are  countersigned  by the  Warrant  Agent  and  shall  have  such
insertions as are appropriate or required or permitted by this Agreement and may
have such letters, numbers or other marks of identification and such legends and
endorsements stamped,  printed,  lithographed or engraved thereon as the Company
may deem  appropriate  and as are not  inconsistent  with the provisions of this
Agreement,  or as may be  required  to  comply  with any law or with any rule or
regulation  pursuant  thereto or with any rule or regulation  of any  securities
exchange on which the Warrants may be listed, or to conform to usage.

          Warrants shall be issued initially in registered form substantially in
the form set forth in Exhibit A.

          The  definitive  Warrant   Certificates   shall  be  typed,   printed,
lithographed  or engraved or produced by any combination of these methods or may
be  produced  in any  other  manner  permitted  by the  rules of any  securities
exchange on which the Warrants may be listed,  all as determined by the officers
executing  such Warrant  Certificates,  as evidenced by their  execution of such
Warrant Certificates.

          SECTION 2.2.  RESTRICTIVE LEGENDS. The Warrant Certificates shall bear
the following legend on the face thereof:

THE WARRANTS  REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE
U.S.  SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT"),  OR ANY STATE
SECURITIES LAWS, AND ACCORDINGLY, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE
TRANSFERRED  EXCEPT AS SET FORTH IN THE FOLLOWING  SENTENCE.  BY ITS ACQUISITION
HEREOF,  THE HOLDER (1)  REPRESENTS  THAT (A) IT IS A  "QUALIFIED  INSTITUTIONAL


                                       6
<PAGE>

BUYER"  (AS  DEFINED  IN RULE  144A  UNDER THE  SECURITIES  ACT) OR (B) IT IS AN
INSTITUTIONAL  "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(a)(1),  (2), (3) OR
(7) OF  REGULATION D UNDER THE  SECURITIES  ACT) (AN  "INSTITUTIONAL  ACCREDITED
INVESTOR"),  (2) AGREES THAT IT WILL NOT,  WITHIN THE TIME PERIOD REFERRED TO IN
RULE 144(k)  (TAKING  INTO  ACCOUNT  THE  PROVISIONS  OF RULE  144(d)  UNDER THE
SECURITIES  ACT,  IF  APPLICABLE)  RESELL OR  OTHERWISE  TRANSFER  THE  WARRANTS
REPRESENTED BY THIS CERTIFICATE  EXCEPT (A) TO KMC TELECOM  HOLDINGS,  INC. (THE
"COMPANY") OR ANY SUBSIDIARY THEREOF, (B) TO A QUALIFIED  INSTITUTIONAL BUYER IN
COMPLIANCE  WITH RULE 144A UNDER THE  SECURITIES  ACT,  (C) TO AN  INSTITUTIONAL
ACCREDITED INVESTOR THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO THE WARRANT AGENT
A SIGNED LETTER CONTAINING CERTAIN  REPRESENTATIONS  AND AGREEMENTS  RELATING TO
THE  RESTRICTIONS  ON TRANSFER OF THE WARRANTS  REPRESENTED BY THIS  CERTIFICATE
(THE FORM OF WHICH  LETTER CAN BE  OBTAINED  FROM THE  WARRANT  AGENT),  AND, AN
OPINION OF COUNSEL REASONABLY ACCEPTABLE TO THE COMPANY THAT SUCH TRANSFER IS IN
COMPLIANCE  WITH  THE  SECURITIES  ACT,  (D)  PURSUANT  TO  THE  EXEMPTION  FROM
REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (E)
PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND (3)
AGREES THAT IT WILL DELIVER TO EACH PERSON TO WHOM THE WARRANTS  REPRESENTED  BY
THIS  CERTIFICATE ARE TRANSFERRED A NOTICE  SUBSTANTIALLY  TO THE EFFECT OF THIS
LEGEND.  IN  CONNECTION  WITH ANY TRANSFER OF THE WARRANTS  REPRESENTED  BY THIS
CERTIFICATE  WITHIN THE TIME PERIOD REFERRED TO ABOVE, THE HOLDER MUST CHECK THE
APPROPRIATE  BOX SET FORTH ON THE REVERSE HEREOF  RELATING TO THE MANNER OF SUCH
TRANSFER  AND SUBMIT THIS  CERTIFICATE  TO THE WARRANT  AGENT.  IF THE  PROPOSED
TRANSFEREE IS AN INSTITUTIONAL  ACCREDITED  INVESTOR,  THE HOLDER MUST, PRIOR TO
SUCH  TRANSFER,  FURNISH  TO EACH OF THE  WARRANT  AGENT  AND THE  COMPANY  SUCH
CERTIFICATIONS,  LEGAL  OPINIONS  OR OTHER  INFORMATION  AS  EITHER  OF THEM MAY
REASONABLY  REQUIRE TO CONFIRM THAT SUCH  TRANSFER IS BEING MADE  PURSUANT TO AN
EXEMPTION  FROM,  OR  IN  A  TRANSACTION   NOT  SUBJECT  TO,  THE   REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT. THE WARRANT  AGREEMENT  CONTAINS A PROVISION
REQUIRING  THE WARRANT  AGENT TO REFUSE TO REGISTER ANY TRANSFER OF THE WARRANTS
REPRESENTED BY THIS CERTIFICATE IN VIOLATION OF THE FOREGOING RESTRICTIONS.

          SECTION  2.3.  EXECUTION  AND  DELIVERY OF WARRANT  CERTIFICATES.  (a)
Warrant Certificates evidencing Warrants to be issued under the Agreement,  each
Warrant to purchase  initially  0.471756 Common Shares,  may be executed,  on or
after the date of this  Agreement,  by the Company and  delivered to the Warrant
Agent for  countersignature,  and the Warrant Agent shall thereupon  countersign
and  deliver  such  Warrant  Certificates  upon  the  order  and at the  written


                                       7
<PAGE>

direction of the Company  signed by its Chairman of the Board,  Vice Chairman of
the Board, President,  Chief Operating Officer, Chief Financial Officer or Chief
Executive Officer to the purchasers thereof on the date of issuance. The Warrant
Agent is hereby  authorized to countersign and deliver  Warrant  Certificates as
required by this Section 2.3,  Section 3.3, Article VI or Article VIII hereof or
Section 2.4 of the Existing Warrant Agreement.

          The Warrant Certificates shall be executed on behalf of the Company by
its  Chairman  of the  Board,  Vice  Chairman  of the  Board,  President,  Chief
Operating  Officer,  Chief Financial  Officer or Chief Executive  Officer either
manually or by facsimile  signature  printed thereon.  The Warrant  Certificates
shall be countersigned by manual signature of the Warrant Agent and shall not be
valid for any purpose unless so  countersigned.  In case any officer or director
of the Company  whose  signature  shall have been placed upon any of the Warrant
Certificates  shall cease to be such  officer or director of the Company  before
countersignature  by the Warrant  Agent and the issuance  and delivery  thereof,
such Warrant Certificates may nevertheless be countersigned by the Warrant Agent
and issued and  delivered  with the same force and effect as though  such person
had not ceased to be such officer or director of the Company.

          (b) On the  Closing  Date,  94,513  Warrants  shall be  issued  by the
Company and  registered  in the name of the  Purchaser  in  connection  with the
issuance and sale to the Purchaser of the Series E Unit.

          SECTION 2.4.  SPRINGING  WARRANTS.  In addition to the Warrants issued
to the  Purchaser  pursuant to the Purchase  Agreement and this  Agreement,  the
Purchaser may also be issued Springing Warrants under Section 2.4 of the Exising
Warrant Agreement unless certain conditions described therein are satisfied. Any
Springing  Warrants  that are issued to the Purchaser  shall be  "Warrants"  for
purposes of this  Agreement and shall be subject to the terms and  conditions of
this Agreement  and, upon any such  issuance,  shall no thereafter be subject to
the terms and conditions of the Existing Warrant Agreement.


                                   ARTICLE III

                     EXERCISE PRICE AND EXERCISE OF WARRANTS

          SECTION 3.1.  EXERCISE PRICE.  Each Warrant  Certificate  shall,  when
countersigned  by the  Warrant  Agent,  initially  entitle  the Holder  thereof,
subject to the  provisions of this  Agreement,  to purchase the number of Common
Shares indicated  thereon at a purchase price (the "EXERCISE PRICE") of $.01 per
Common  Share,  subject to  adjustment  as provided in Section 4.1 and Article V
hereof.

          SECTION 3.2.  EXERCISE;  RESTRICTIONS  ON EXERCISE.  At any time after
February 4, 2000, and on or before the Expiration Date, any outstanding Warrants
may be exercised on any Business Day by the Holders thereof;  provided, that the


                                       8
<PAGE>

Warrant  Registration  Statement  is,  at the time of  exercise,  effective  and
available  for the exercise of the Warrants or the exercise of such  Warrants is
exempt  from  the  registration  requirements  of the  Securities  Act;  further
provided,  that  notwithstanding  anything to the  contrary  in this  Agreement,
neither any Holder nor any of its  permitted  transferees  (each,  a  "Regulated
Holder")  shall be entitled to exercise any Warrants,  unless in the  reasonable
judgment of such  Regulated  Holder,  such  exercise  would not violate the Bank
Holding  Company  Act of  1956,  as  amended,  and the  regulations  promulgated
thereunder.  Any Warrants not exercised by 5:00 p.m., New York City time, on the
Expiration  Date shall  expire and all  rights of the  Holders of such  Warrants
shall terminate. Additionally, pursuant to Section 4.1(j)(ii) hereof and subject
to the conditions set forth therein, the Warrants shall expire and all rights of
the Holders of such Warrants shall  terminate in the event the Company merges or
consolidates  with or sells all or substantially  all of its property and assets
to a Person  (other  than an  Affiliate  of the  Company)  if the  consideration
payable  to  holders  of Common  Stock in  exchange  for their  Common  Stock in
connection with such merger, consolidation or sale consists solely of cash or in
the event of the dissolution, liquidation or winding up of the Company.

          SECTION 3.3.  METHOD OF EXERCISE;  PAYMENT OF EXERCISE PRICE. In order
to exercise all or any of the Warrants represented by a Warrant Certificate, the
Holder  thereof  must  surrender  for exercise  the Warrant  Certificate  to the
Warrant  Agent at its corporate  trust office  address set forth in Section 11.5
hereof,  with the  Subscription  Form set forth on the  reverse  of the  Warrant
Certificate  duly executed,  together with payment in full of the Exercise Price
then in  effect  for each  Common  Share  (or other  securities)  issuable  upon
exercise of the Warrants as to which a Warrant is exercised; such payment may be
made  by  wire  transfer,  in  cash or by  certified  or  official  bank or bank
cashier's  check  payable to the order of the  Company  and shall be made to the
Warrant  Agent at its corporate  trust office  address set forth in Section 11.5
hereof  prior to the close of business on the date the  Warrant  Certificate  is
surrendered to the Warrant Agent for exercise. Notwithstanding the foregoing, if
the Common Shares (or other  securities)  issuable upon exercise of the Warrants
are  registered  under  the  Exchange  Act,  the  Exercise  Price may be paid by
surrendering additional Warrants to the Warrant Agent having an aggregate Spread
equal to the  aggregate  Exercise  Price of the Warrants  being  exercised.  All
payments received upon exercise of Warrants shall be delivered to the Company by
the Warrant Agent as instructed in writing by the Company.  If less than all the
Warrants  represented by a Warrant  Certificate are exercised or surrendered (in
connection  with  a  cashless  exercise),  such  Warrant  Certificate  shall  be
surrendered  and a new Warrant  Certificate of the same tenor and for the number
of Warrants  which were not  exercised or  surrendered  shall be executed by the
Company  and  delivered  to the  Warrant  Agent  and  the  Warrant  Agent  shall
countersign the new Warrant Certificate, registered in such name or names as may
be  directed  in  writing  by the  Holder,  and shall  deliver  the new  Warrant
Certificate  to the Person or Persons  entitled  to receive  the same.  Upon the
exercise of any Warrants  following  the surrender of a Warrant  Certificate  in
conformity with the foregoing  provisions,  the Warrant Agent shall instruct the
Company to transfer  promptly  to the Holder or,  upon the written  order of the
Holder of such  Warrant  Certificate,  appropriate  evidence of ownership of any
Common Shares or other security or property to which it is entitled,  registered
or  otherwise  placed in such name or names as may be directed in writing by the
Holder,  and to deliver  such  evidence  of  ownership  to the Person or Persons
entitled  to receive  the same and  fractional  shares,  if any, or an amount in


                                       9
<PAGE>

cash,  in lieu of any  fractional  shares,  as  provided  in Section 4.5 hereof;
provided that the Holder of such Warrant shall be responsible for the payment of
any  transfer  taxes  required as the result of any change in  ownership of such
Warrants or the issuance of such Common  Shares other than to the Holder of such
Warrants  and any such  transfer  shall  comply with  applicable  law.  Upon the
exercise of a Warrant or Warrants,  the Warrant Agent is hereby  authorized  and
directed to  requisition  from any transfer  agent of the Common Shares (and all
such transfer  agents are hereby  authorized  to comply with all such  requests)
certificates  (bearing  the  legend  set  forth  in  Section  11.10  hereof,  if
applicable, unless a registration statement relating to such Common Shares filed
with the  Commission  shall  then be in effect  or the  Company  and the  Holder
exercising such Warrant or Warrants otherwise agree) for the necessary number of
Common Shares to which said Holder may be entitled.  The Company shall enter, or
shall cause any transfer  agent of the Common  Shares to enter,  the name of the
Person  entitled to receive the Common Shares upon exercise of the Warrants into
the  Company's  register  of  shareholders  within 14 days of such  exercise.  A
Warrant shall be deemed to have been exercised immediately prior to the close of
business on the date of the surrender for exercise,  as provided  above,  of the
Warrant  Certificate  representing such Warrant together with payment in full of
the  Exercise  Price  (or  surrender  of  sufficient  Warrant   Certificates  in
connection with a cashless exercise) and, for all purposes under this Agreement,
the Person entitled to receive any Common Shares  deliverable upon such exercise
shall,  as between  such Person and the  Company,  be deemed to be the Holder of
such Common  Shares of record as of the close of business on such date and shall
be entitled to receive,  and the Warrant Agent shall deliver to such Person, any
Common Shares to which such Person would have been entitled had such Person been
the registered holder on such date.

                                   ARTICLE IV

                                   ADJUSTMENTS

          SECTION 4.1. ADJUSTMENTS.  The Exercise Price and the number of Common
Shares  issuable  upon  exercise of each Warrant  shall be subject to adjustment
from time to time as follows:

          (a) DIVISIONS; CONSOLIDATIONS;  RECLASSIFICATIONS. In case the Company
shall, on or before the Expiration  Date, (i) issue any Common Shares in payment
of a dividend  or other  distribution  with  respect to its Common  Stock,  (ii)
subdivide its issued and outstanding Common Shares, (iii) consolidate its issued
and  outstanding  Common  Shares  into a  smaller  number  of  shares,  or  (iv)
reclassify  or convert  the Common  Shares  (other  than a  reclassification  in
connection with a merger, consolidation or other business combination which will
be governed by Section  4.1(j)),  then the number of Common  Shares  purchasable
upon  exercise  of each  Warrant  immediately  prior to the record date for such
issue or distribution or the effective date of such subdivision,  consolidation,
reclassification  or  conversion  shall be  adjusted  so that the Holder of each
Warrant  shall  thereafter  be entitled to receive the kind and number of Common
Shares which such Holder would have been entitled to receive after the happening
of any of the events described above had such Warrant been exercised immediately


                                       10
<PAGE>

prior to the happening of such event or any record date with respect thereto. An
adjustment  made  pursuant  to  this  Section  4.1(a)  shall  become   effective
immediately  after the effective  date of such event  retroactive  to the record
date, if any, for such event.

          (b) RIGHTS; OPTIONS; WARRANTS. In case the Company shall issue rights,
options,   warrants  or  convertible  or  exchangeable  securities  (other  than
convertible or exchangeable securities subject to Section 4.1(a)) to all holders
of its Common Shares,  entitling them to subscribe for or purchase Common Shares
at a price per share which is lower (at the record date for such  issuance) than
the then Current  Market Value per Common  Share,  then the Company shall ensure
that at the time of such  issuance,  the same or a like offer or  invitation  is
made to the Holders of the Warrants as if their  Warrants had been  exercised on
the day immediately preceding the record date of such offer or invitation on the
terms (subject to any  adjustment  pursuant to Section 4.1(a) for a prior event)
on which such Warrants could have been exercised on such date;  provided that if
the Board so resolves, the Company shall not be required to ensure that the same
offer or invitation  is made to the Holders of the  Warrants,  but the number of
Common  Shares  thereafter  purchasable  upon the exercise of each Warrant shall
instead be adjusted and shall be determined by multiplying  the number of Common
Shares theretofore  purchasable upon exercise of each Warrant by a fraction, the
numerator  of  which  shall  be the  sum of (i)  the  number  of  Common  Shares
outstanding immediately prior to the issuance of such rights, options,  warrants
or convertible  or  exchangeable  securities  plus (ii) the number of additional
Common Shares which may be purchased or subscribed for upon  exercise,  exchange
or conversion of such rights,  options,  warrants or convertible or exchangeable
securities  and the  denominator  of which shall be the sum of (x) the number of
Common  Shares  outstanding  immediately  prior to the  issuance of such rights,
options,  warrants or convertible or exchangeable securities plus (y) the number
of shares which the total consideration received by the Company for such rights,
options,  warrants or  convertible or  exchangeable  securities so offered would
purchase at the then Current Market Value per Common Share.  Except as otherwise
provided  above,  such adjustment  shall be made whenever such rights,  options,
warrants or convertible or exchangeable  securities are issued, and shall become
effective retroactively  immediately after the record date for the determination
of  shareholders  entitled  to  receive  such  rights,   options,   warrants  or
convertible or exchangeable securities.

          (c)  ISSUANCE OF COMMON  SHARES AT LOWER  VALUES.  In case the Company
shall sell and issue any Common Share or Right (as defined below) (excluding (i)
any Right issued in any of the  transactions  described in Section 4.1(a) or (b)
above,  (ii) Common Shares issued pursuant to (x) any Rights  outstanding on the
date of this  Agreement  or any Rights  issued in any  transaction  described in
Section  4.1(a)  or (b) above  and (y) a Right,  if on the date  such  Right was
issued, the exercise, conversion or exchange price per Common Share with respect
thereto was at least equal to the then Current  Market  Value per Common  Share,
(iii)  any  Common  Shares  or  Rights  issued  (A) as  consideration  when  any
corporation or business is acquired,  merged into or becomes part of the Company
or a subsidiary of the Company or (B) in good faith in connection with any other
acquisition of assets, in each case in an arm's-length  transaction  between the
Company and a Person  other than an  Affiliate  of the  Company,  (iv) grants or
exercises of Rights granted to or exercised by employees, directors, consultants
or advisors of the Company or any of its subsidiaries for issuances of shares of


                                       11
<PAGE>

Common  Stock to such Persons and (v)  exercises of Rights by former  employees,
former directors, former consultants or former advisors of the Company or any of
its  subsidiaries  for issuances of shares of Common Stock to such Persons) at a
price per Common Share  (determined  in the case of any such Right,  by dividing
(x) the total  consideration  receivable by the Company in  consideration of the
sale and  issuance of such Right,  plus the total  consideration  payable to the
Company upon exercise,  conversion or exchange thereof,  by (y) the total number
of Common  Shares  covered by such Right) that is lower than the Current  Market
Value per Common  Share in effect  immediately  prior to such sale or  issuance,
then the number of Common  Shares  thereafter  purchasable  upon the exercise of
each Warrant  shall be  determined  by  multiplying  the number of Common Shares
theretofore  purchasable  upon  exercise  of such  Warrant  by a  fraction,  the
numerator of which shall be the number of Common Shares outstanding  immediately
after such sale or issuance and the  denominator of which shall be the number of
Common Shares  outstanding  immediately  prior to such sale or issuance plus the
number of Common Shares which the aggregate  consideration  received (determined
as provided  below) for such sale or  issuance  would  purchase at such  Current
Market Value per Common Share.  For purposes of this Section 4.1(c),  the Common
Shares which the holder of any such Right shall be entitled to subscribe  for or
purchase  shall be deemed to be issued  and  outstanding  as of the date of such
sale and issuance and the  consideration  received by the Company therefor shall
be deemed to be the  consideration  received by the Company for such Right, plus
the  consideration  or  premiums  stated in such Right to be paid for the Common
Shares  covered  thereby.  In case the  Company  shall  sell and issue any Right
together  with one or more  other  securities  as part of a unit at a price  per
unit,  then in determining  the "price per Common Share" and the  "consideration
received by the  Company"  for  purposes of the first  sentence of this  Section
4.1(c),  the Board shall  determine,  in good faith, the fair value of the Right
then being sold as part of such unit. For purposes of this paragraph,  a "RIGHT"
shall mean any right,  option,  warrant or convertible or exchangeable  security
containing  the Right to  subscribe  for or acquire one or more  Common  Shares,
excluding the Warrants. This Section 4.1(c) shall not apply to: (i) the exercise
of Warrants,  or the conversion or exchange of other  securities  convertible or
exchangeable  for Common Shares;  or (ii) Common Shares issued upon the exercise
of Rights or warrants issued to all holders of Common Shares.

          (d) DISTRIBUTIONS OF DEBT, ASSETS,  SUBSCRIPTION RIGHTS OR CONVERTIBLE
SECURITIES.  In case the Company shall make a distribution to all holders of its
Common  Shares  of  evidences  of  its   indebtedness,   or  assets,   or  other
distributions  (excluding  distributions  in  connection  with the  dissolution,
liquidation  or  winding-up  of the  Company  which shall be governed by Section
4.1(j) and  distributions of securities  referred to in Section 4.1(a),  Section
4.1(b) or  Section  4.1(c)),  then,  in each case,  the number of Common  Shares
purchasable  after such record date upon the exercise of each  Warrant  shall be
determined  by  multiplying  the number of Common  Shares  purchasable  upon the
exercise of such  Warrant  immediately  prior to such record date by a fraction,
the  numerator  of which  shall be the  Current  Market  Value per Common  Share
immediately  prior to the record date for such  distribution and the denominator


                                       12
<PAGE>

of which shall be the Current Market Value per Common Share immediately prior to
the record date for such distribution less the then fair value (as determined in
good faith by the Board) of the  evidences of  indebtedness,  or assets or other
distributions so distributed  attributable to one Common Share.  Such adjustment
shall be made whenever any such distribution is made, and shall become effective
on the date of distribution retroactive to the record date for the determination
of shareholders entitled to receive such distribution.

          (e) EXPIRATION OF RIGHTS, OPTIONS AND CONVERSION PRIVILEGES.  Upon the
expiration of any rights, options, warrants or conversion or exchange privileges
(including,  without limitation, any Rights) that have previously resulted in an
adjustment hereunder, if any thereof shall not have been exercised, exchanged or
converted,  the Exercise Price and the number of Common Shares issuable upon the
exercise of each Warrant shall,  upon such  expiration,  be readjusted and shall
thereafter,  upon any future exercise,  be such as they would have been had they
been originally adjusted (or had the original  adjustment not been required,  as
the case may be) as if (i) the only  Common  Shares  so issued  were the  Common
Shares,  if any,  actually  issued  or  sold  upon  the  exercise,  exchange  or
conversion of such rights,  options,  warrants or conversion or exchange  rights
(including, without limitation, any Rights) and (ii) such Common Shares, if any,
were issued or sold for the consideration  actually received by the Company upon
such exercise,  exchange or conversion plus the consideration,  if any, actually
received by the Company for issuance, sale or grant of all such rights, options,
warrants or conversion or exchange rights (including,  without  limitation,  any
Rights) whether or not exercised.

          (f) CURRENT MARKET VALUE.  For the purposes of any  computation  under
this  Article IV, the  "CURRENT  MARKET  VALUE" per Common Share or of any other
security  (herein  collectively  referred to as a "security") at any date herein
specified shall be:

          (i) if the  security is not  registered  under the  Exchange  Act, the
     value of the security (1) most recently  determined as of a date within the
     six months preceding such date by an Independent  Financial Expert selected
     by the Board in accordance  with the criteria for such valuation set out in
     Section 4.1(k), or (2) if no such determination shall have been made within
     such six-month period or if the Company so chooses, determined as of such a
     date by an Independent Financial Expert selected by the Board in accordance
     with the criteria for such valuation set out in Section 4.1(k), or

          (ii) if the security is registered under the Exchange Act, the average
     of the daily market prices of the security for the 20  consecutive  trading
     days  immediately  preceding  such  date  or,  if  the  security  has  been
     registered under the Exchange Act for less than 20 consecutive trading days
     before such date,  then the average of the daily  market  prices for all of
     the  trading  days  before  such date for which  daily  market  prices  are
     available.  The market price for each such trading day shall be: (A) in the
     case of a security listed or admitted to trading on any national securities
     exchange,  the closing sales price, regular way, on such day, or if no sale
     takes place on such day, the average of the closing bid and asked prices on


                                       13
<PAGE>

     such day on the  principal  national  securities  exchange  on  which  such
     security is listed or admitted,  as determined by the Board, in good faith,
     (B) in the case of a security not then listed or admitted to trading on any
     national securities exchange,  the last reported sale price on such day, or
     if no sale takes  place on such day,  the  average of the  closing  bid and
     asked  prices on such day,  as reported  by a  reputable  quotation  source
     designated by the Company, (C) in the case of a security not then listed or
     admitted to trading on any national  securities exchange and as to which no
     such reported sale price or bid and asked prices are available, the average
     of the reported high bid and low asked prices on such day, as reported by a
     reputable  quotation service,  or a newspaper of general circulation in the
     Borough of Manhattan,  City and State of New York customarily  published on
     each Business Day, designated by the Company,  or, if there shall be no bid
     and asked  prices on such day,  the  average  of the high bid and low asked
     prices, as so reported, on the most recent day (not more than 30 days prior
     to the date in question)  for which prices have been so reported and (D) if
     there are no bid and asked prices  reported during the 30 days prior to the
     date in  question,  the  Current  Market  Value  of the  security  shall be
     determined as if the security were not registered under the Exchange Act.

          (g) CONSIDERATION RECEIVED. For purposes of any computation respecting
consideration received pursuant to this Section 4.1, the following shall apply:

          (i) in the  case of the  issuance  of  Common  Shares  for  cash,  the
     consideration  shall be the amount of such cash,  provided  that in no case
     shall  any  deduction  be made  for any  commissions,  discounts  or  other
     expenses  incurred  by the  Company  for any  underwriting  of the issue or
     otherwise in connection therewith;

          (ii) in the case of the issuance of Common Shares for a  consideration
     in whole or in part  other  than cash,  the  consideration  other than cash
     shall be deemed to be the fair market value  thereof as  determined in good
     faith by the Board  (irrespective  of the  accounting  treatment  thereof),
     whose  determination shall be conclusive and described in reasonable detail
     in a board  resolution  which  shall  be  provided  as soon as  practicable
     thereafter to the Warrant Agent; and

          (iii) in the case of the  issuance  of rights,  options,  warrants  or
     securities convertible into or exchangeable for Common Shares,  (including,
     without  limitation,  any Rights),  the  aggregate  consideration  received
     therefor  shall be deemed to be the  consideration  received by the Company
     for  the  issuance  of  such  rights,   options,   warrants  or  securities
     convertible  into or  exchangeable  for Common Shares,  plus the additional
     minimum  consideration,  if any, to be  received  by the  Company  upon the
     exercise, conversion or exchange thereof (the consideration in each case to
     be  determined  in the same  manner as  provided in clauses (i) and (ii) of
     this Section 4.1(g)).

          (h) DE  MINIMIS  ADJUSTMENTS.  No  adjustment  in the number of Common
Shares  purchasable  hereunder shall be required  unless such  adjustment  would
require an increase  or  decrease of at least one percent  (1%) in the number of
Common Shares purchasable upon the exercise of each Warrant; provided,  however,


                                       14
<PAGE>

that any adjustments  which by reason of this Section 4.1(h) are not required to
be made  shall be carried  forward  and taken  into  account  in any  subsequent
adjustment.  All calculations  shall be made to the nearest  one-thousandth of a
share.

          (i) ADJUSTMENT OF EXERCISE PRICE. Whenever the number of Common Shares
purchasable  upon the exercise of each Warrant is adjusted,  as herein provided,
the Exercise  Price per Common Share payable upon exercise of such Warrant shall
be adjusted  (calculated  to the nearest  $.01) so that it shall equal the price
determined  by  multiplying  such  Exercise  Price  immediately  prior  to  such
adjustment  by a fraction  the  numerator of which shall be the number of Common
Shares  purchasable upon the exercise of each Warrant  immediately prior to such
adjustment and the  denominator of which shall be the number of Common Shares so
purchasable  immediately  thereafter.  Following any  adjustment to the Exercise
Price pursuant to this Article IV, the amount payable,  when adjusted,  together
with the amount paid in connection  with the original  issuance of the Warrants,
shall  never be less  than the par value  per  Common  Share at the time of such
adjustment.

          If after an adjustment,  a Holder of a Warrant upon exercise of it may
receive shares of two or more classes in the capital of the Company, the Company
shall  determine  the  allocation  of the adjusted  Exercise  Price between such
classes of shares in a manner  that the Board  deems fair and  equitable  to the
Holders. After such allocation, the exercise privilege and the Exercise Price of
each  class of  shares  shall  thereafter  be  subject  to  adjustment  on terms
comparable to those applicable to Common Shares in this Article IV.

          Such adjustment shall be made  successively  whenever any event listed
above shall occur.

          (j)  CONSOLIDATION,  MERGER,  ETC.  (i) Subject to the  provisions  of
Subsection (ii) below of this Section 4.1(j),  in case of the  consolidation  of
the Company  with,  or merger of the Company with or into, or of the sale of all
or substantially all of the properties and assets of the Company to, any Person,
and in connection therewith consideration is payable to holders of Common Shares
(or other  securities  or property  purchasable  upon  exercise of  Warrants) in
exchange therefor, the Warrants shall remain subject to the terms and conditions
set forth in this  Agreement and each Warrant shall,  after such  consolidation,
merger or sale, entitle the Holder to receive upon exercise the number of shares
in the capital or other  securities or property  (including cash) of or from the
Person  resulting from such  consolidation  or surviving such merger or to which
such sale  shall be made or of the  parent of such  Person,  as the case may be,
that would have been distributable or payable on account of the Common Shares if
such  Holder's  Warrants had been  exercised  immediately  prior to such merger,
consolidation or sale (or, if applicable,  the record date therefor); and in any
such case the  provisions  of this  Agreement  with  respect  to the  rights and
interests thereafter of the Holders of Warrants shall be appropriately  adjusted
by the Board in good faith so as to be  applicable,  as nearly as may reasonably
be, to any shares,  other securities or any property  thereafter  deliverable on
the exercise of the Warrants.

          (ii)  Notwithstanding  the  foregoing,  (x) if the  Company  merges or
     consolidates  with, or sells all or  substantially  all of its property and


                                       15
<PAGE>

     assets to,  another  Person  (other than an  Affiliate  of the Company) and
     consideration  is payable to holders of Common Shares in exchange for their
     Common Shares in connection with such merger,  consolidation  or sale which
     consists  solely  of  cash,  or  (y)  in  the  event  of  the  dissolution,
     liquidation  or winding up of the  Company,  then the  Holders of  Warrants
     shall be entitled to receive  distributions on the date of such event on an
     equal basis with  holders of Common  Shares (or other  securities  issuable
     upon  exercise  of the  Warrants)  as if the  Warrants  had been  exercised
     immediately  prior to such event,  less the Exercise Price. Upon receipt of
     such payment,  if any, the rights of a Holder shall terminate and cease and
     such  Holder's   Warrants  shall  expire.  In  case  of  any  such  merger,
     consolidation or sale of assets,  the surviving or acquiring Person and, in
     the event of any dissolution, liquidation or winding up of the Company, the
     Company  shall deposit  promptly with the Warrant Agent the funds,  if any,
     necessary to pay the Holders of the Warrants. After receipt of such deposit
     from such Person or the Company and after  receipt of  surrendered  Warrant
     Certificates, the Warrant Agent shall make payment by delivering a check in
     such amount as is appropriate (or, in the case of consideration  other than
     cash, such other consideration as is appropriate) to such Person or Persons
     as it may be directed in writing by the Holder surrendering such Warrants.

          (k) If required  pursuant  to Section  4.1(f)(i),  the Current  Market
Value shall be deemed to be equal to the value set forth in the Value Report (as
defined below) as determined by an Independent  Financial Expert, which shall be
selected by the Board in its sole  discretion,  and retained on customary  terms
and  conditions,  using  one or more  valuation  methods  that  the  Independent
Financial  Expert,  in its best  professional  judgment,  determines  to be most
appropriate.  The Company  shall use its  reasonable  best  efforts to cause the
Independent  Financial  Expert to  deliver  to the  Company,  with a copy to the
Warrant Agent,  within 45 days of the appointment of the  Independent  Financial
Expert,  a value  report  (the "VALUE  REPORT")  stating the value of the Common
Shares and other securities or property of the Company,  if any, being valued as
of the  Valuation  Date and  containing  a brief  statement as to the nature and
scope of the examination or investigation  upon which the determination of value
was made.  The Warrant Agent shall have no duty with respect to the Value Report
of any Independent Financial Expert, except to keep it on file and available for
inspection  by the  Holders.  The  determination  as to Current  Market Value in
accordance with the provisions of this Section 4.1(k) shall be conclusive on all
Persons.  The Independent  Financial Expert shall consult with management of the
Company in order to allow  management to comment on the proposed  value prior to
delivery to the Company of any Value Report.

          (l) WHEN NO ADJUSTMENT REQUIRED.  Without limiting any other exception
contained in this Section 4.1, and in addition  thereto,  no adjustment  need be
made for:

          (i)  (A) grants to,  exercises  of Rights by, or  issuances  of equity
               securities to employees,  directors,  consultants  or advisors of


                                       16
<PAGE>

               the  Company  or any of its  subsidiaries  and (B)  exercises  of
               Rights by, or issuances of equity  securities in connection  with
               Rights previously  issued to former employees,  former directors,
               former  consultants or former  advisors of KMC Telecom,  Inc. (to
               the  extent  that all such  securities  do not have an  aggregate
               value in excess of 15% of the  equity  value of the  Company on a
               fully diluted basis, as determined in good faith by the Board);

          (ii) grants of  options,  warrants  or other  agreements  or rights to
               purchase  capital stock of the Company  entered into prior to the
               date of the  issuance of the  Warrants or any issuance of capital
               stock pursuant thereto or in connection therewith;

          (iii)rights to purchase  Common Shares  pursuant to a Company plan for
               the reinvestment of dividends or interest;

          (iv) future  options,  warrants  or other  rights  with an exercise or
               conversion  price at least equal to the fair market  value of the
               related shares on the date of grant,  as determined in good faith
               by the Company's Board of Directors;

          (v)  a change  in the par  value of the  Common  Shares  (including  a
               change from par value to no par value or vice versa);

          (vi) bona  fide  public  offerings  or  private   placements   through
               investment banks of national standing; and

          (vii) the issuance of Springing Warrants.

          To the extent the Warrants become convertible into cash, no adjustment
need be made thereafter as to the cash. Interest will not accrue on the cash.

          SECTION  4.2.  NOTICE OF  ADJUSTMENT.  Whenever  the  number of Common
Shares  purchasable  upon the exercise of each Warrant or the Exercise  Price is
adjusted, as herein provided, the Company shall cause, so far as it is able, the
Warrant Agent  promptly to mail,  at the expense of the Company,  to each Holder
notice of such  adjustment or adjustments and shall deliver to the Warrant Agent
a  certificate  of the  Auditors  setting  forth the  number  of  Common  Shares
purchasable  upon the exercise of each Warrant and the Exercise Price after such
adjustment,  setting  forth  a  brief  statement  of the  facts  requiring  such
adjustment and setting forth the  computation by which such adjustment was made.
Such  certificate  shall  be  conclusive  evidence  of the  correctness  of such
adjustment  except in the case of manifest  error.  The  Warrant  Agent shall be
entitled  to  rely  on  such   certificate   and  shall  be  under  no  duty  or
responsibility with respect to any such certificate, except to exhibit the same,


                                       17
<PAGE>

from  time  to  time,  to any  Holder  desiring  an  inspection  thereof  during
reasonable business hours upon reasonable notice. The Warrant Agent shall not at
any time be under any duty or responsibility to any Holders to determine whether
any facts exist which may require any  adjustment  of the Exercise  Price or the
number of Common  Shares  purchasable  on exercise of the Warrants or any of the
other  adjustments  set forth in Section  4.1, or with  respect to the nature or
extent of any such  adjustment when made, or with respect to the method employed
in making such  adjustment,  or the validity or value (or the kind or amount) of
any Common  Shares which may be  purchasable  on exercise of the  Warrants.  The
Warrant  Agent shall not be  responsible  for any failure of the Company to make
any cash  payment or to issue,  transfer or deliver  any Common  Shares or share
certificates upon the exercise of any Warrant.

          SECTION 4.3. STATEMENT ON WARRANTS.  Irrespective of any adjustment in
the Exercise Price or the number or kind of shares purchasable upon the exercise
of the  Warrants,  Warrants  theretofore  or  thereafter  issued may continue to
express  the same  price and  number  and kind of  shares  as are  stated in the
Warrants initially issuable pursuant to this Agreement.

          SECTION 4.4. NOTICE OF CONSOLIDATION, MERGER, ETC. In case at any time
after  the date  hereof  and prior to 5:00  p.m.  (New  York  City  time) on the
Expiration  Date,  there shall be any (i)  consolidation or merger involving the
Company or sale,  transfer or other  disposition of all or substantially  all of
the  Company's  property,  assets  or  business  (except  (A) a merger  or other
reorganization  in which the  Company  shall be the  surviving  corporation  and
holders of Common Shares receive no consideration in respect of their shares and
(B) a merger of the Company into a wholly owned  subsidiary of the Company,  the
principal purpose of which, in the good faith  determination of the Board, is to
change the state of incorporation of the Company) or (ii) any other  transaction
contemplated by Section 4.1(j)(ii) above then, in any one or more of such cases,
the  Company  shall  cause to be mailed to the  Warrant  Agent and shall use its
reasonable  best  efforts  to cause  the  Warrant  Agent to mail,  at  Company's
expense, to each Holder of a Warrant, at the earliest  practicable time (and, in
any event,  not less than 20 days  before any date set for  definitive  action),
notice of the date on which such reorganization,  sale,  consolidation,  merger,
dissolution,  liquidation  or winding up shall take  place,  as the case may be.
Such notice shall also set forth such facts as shall indicate the effect of such
action (to the extent  such  effect may be known at the date of such  notice) on
the  Exercise  Price and the kind and  amount  of the  Common  Shares  and other
securities,  money and other property deliverable upon exercise of the Warrants.
Such notice shall also specify the date as of which the holders of record of the
Common  Shares or other  securities  or property  issuable  upon exercise of the
Warrants  shall be entitled to exchange  their shares for  securities,  money or
other  property  deliverable  upon  such  reorganization,  sale,  consolidation,
merger, dissolution, liquidation or winding up, as the case may be.

          SECTION 4.5. FRACTIONAL  INTERESTS.  If more than one Warrant shall be
presented  for exercise in full at the same time by the same Holder,  the number
of full Common Shares which shall be issuable  upon such exercise  thereof shall
be computed on the basis of the aggregate number of Common Shares purchasable on
exercise of the  Warrants  so  presented.  The Company  shall not be required to


                                       18
<PAGE>

issue fractional Common Shares upon the exercise of Warrants. If any fraction of
a Common Share would, except for the provisions of this Section 4.5, be issuable
on the exercise of any Warrant (or specified portion  thereof),  the Company may
pay an amount in cash  calculated  by it to be equal to the then Current  Market
Value per Common Share multiplied by such fraction computed to the nearest whole
cent.

          SECTION 4.6. WHEN ISSUANCE OR PAYMENT MAY BE DEFERRED.  In any case in
which this Article IV shall require that an adjustment in the Exercise  Price be
made effective as of a record date for a specified  event, the Company may elect
to defer  until the  occurrence  of such event (i)  issuing to the Holder of any
Warrant  exercised  after such record date the Common Shares and other shares in
the capital of the Company,  if any,  issuable upon such exercise over and above
the  Common  Shares and other  shares in the  capital  of the  Company,  if any,
issuable  upon such  exercise  and (ii) paying such Holder any amount in cash in
lieu of a fractional share; provided, however, that the Company shall deliver to
such Holder a due bill or other appropriate  instrument evidencing such Holder's
right to receive such additional  Common Shares,  other shares and cash upon the
occurrence of the event requiring such adjustment.

          SECTION 4.7. INITIAL PUBLIC OFFERING.  Notwithstanding anything to the
contrary herein contained, if the Company conducts an initial public offering of
equity securities (other than nonconvertible preferred shares), the Company will
give the Holders the  opportunity  to convert (i) such Warrants into warrants to
purchase such equity securities (other than nonconvertible preferred shares) and
(ii) any Common Shares or other securities that have been previously received by
the Holders upon the  exercise of Warrants  into such equity  securities  (other
than nonconvertible  preferred shares).  Such conversion  opportunity will be on
terms  and  conditions  determined  to be  fair  and  reasonable  by the  Board.
Notwithstanding  the exercise date described in Section 3.2, in the event that a
Holder holds  Warrants that are not then  exercisable  under Section 3.2 and the
Holder of such  Warrants  would be entitled to  piggy-back  registration  rights
pursuant  to Section 2 of the  Warrant  Registration  Rights  Agreement  if such
Warrants were exercisable,  then such Warrants shall become exercisable,  at the
election of the Holder, to the extent necessary to permit such Holder to utilize
all of such registration rights.

                                    ARTICLE V

                           DECREASE IN EXERCISE PRICE

          The Board, in its sole  discretion,  shall have the right at any time,
or from time to time,  to decrease  the Exercise  Price of the  Warrants  and/or
increase the number of shares issuable upon the exercise of the Warrants.

                                   ARTICLE VI

                               LOSS OR MUTILATION

          Upon  receipt  by the  Company  and  the  Warrant  Agent  of  evidence
satisfactory  to them of the  ownership  and the  loss,  theft,  destruction  or
mutilation of any Warrant  Certificate and of indemnity or bond  satisfactory to
them and (in the case of mutilation)  upon surrender and  cancellation  thereof,


                                       19
<PAGE>

then,  in the  absence of notice to the  Company or the  Warrant  Agent that the
Warrants  represented  thereby have been acquired by a bona fide purchaser,  the
Company shall execute and the Warrant Agent shall countersign and deliver to the
registered  Holder  of  the  lost,   stolen,   destroyed  or  mutilated  Warrant
Certificate,  in exchange for or in lieu thereof,  a new Warrant  Certificate of
the same tenor and for a like aggregate number of Warrants. Upon the issuance of
any new Warrant  Certificate  under this Article VI, the Company may require the
payment of a sum sufficient to cover any tax or other  governmental  charge that
may be imposed in relation  thereto and other  expenses  (including the fees and
expenses  of the  Warrant  Agent) in  connection  therewith.  Every new  Warrant
Certificate  executed and  delivered  pursuant to this Article VI in lieu of any
lost,  stolen or destroyed  Warrant  Certificate  shall constitute a contractual
obligation of the Company whether or not the allegedly lost, stolen or destroyed
Warrant  Certificates  shall be at any time  enforceable  by anyone and shall be
entitled to the benefits of this Agreement equally and proportionately  with any
and all other Warrant  Certificates duly executed and delivered  hereunder.  The
provisions of this Article VI are  exclusive  and shall  preclude (to the extent
lawful)  all  other  rights or  remedies  with  respect  to the  replacement  of
mutilated, lost, stolen, or destroyed Warrant Certificates.

                                   ARTICLE VII

                          RESERVATION AND AUTHORIZATION
                                OF COMMON SHARES

          The Company shall at all times reserve and keep  available such number
of its authorized but unissued  Common Shares  deliverable  upon exercise of the
Warrants as will be sufficient to permit the exercise in full of all outstanding
Warrants and will cause appropriate  evidence of ownership of such Common Shares
to be delivered to the Warrant Agent upon its request for delivery  thereof upon
the exercise of Warrants.  The Company  covenants  that all Common Shares of the
Company  that may be  issued  upon  the  exercise  of the  Warrants  will,  upon
issuance, be duly authorized,  validly issued, fully paid and not subject to any
calls for funds and free from pre-emptive rights and all taxes,  liens,  charges
and security interests with respect to the issue thereof.

                                  ARTICLE VIII

    WARRANT TRANSFER BOOKS; RESTRICTIONS ON TRANSFER; CERTAIN TRANSFER RIGHTS


          SECTION 8.1. TRANSFER AND EXCHANGE.  The Warrant Certificates shall be
issued in  registered  form only.  The Warrant  Agent shall keep at its office a
register for the registration of Warrant Certificates and transfers or exchanges
of  Warrant  Certificates  as  herein  provided  and other  appropriate  data as
determined by the Warrant Agent.  The Company shall,  upon reasonable  notice to
the Warrant  Agent,  have  access to such  register  during the Warrant  Agent's
regular business hours. All Warrant Certificates issued upon any registration of


                                       20
<PAGE>

transfer or exchange of Warrant  Certificates  shall be the valid obligations of
the Company, evidencing the same obligations,  and entitled to the same benefits
under  this  Agreement,  as  the  Warrant  Certificates   surrendered  for  such
registration of transfer or exchange.

          The Warrants  (other than any Springing  Warrants)  shall initially be
issued as part of the issuance of the Unit.  Prior to the Separation  Date, such
Warrants  may  not be  transferred  or  exchanged  separately  from,  but may be
transferred or exchanged only together with, the Series E Preferred Stock issued
as part of the Unit.

          A Holder may transfer its Warrants only by written  application to the
Warrant  Agent  stating  the  name  of the  proposed  transferee  and  otherwise
complying with the terms of this  Agreement.  No such transfer shall be effected
until,  and such  transferee  shall succeed to the rights of a Holder only upon,
final  acceptance and  registration  of the transfer by the Warrant Agent in the
register.  Prior to the  registration of any transfer of Warrants by a Holder as
provided herein, the Company, the Warrant Agent, and any agent of the Company or
the Warrant Agent may treat the Person in whose name the Warrants are registered
as the owner thereof for all purposes and as the Person entitled to exercise the
rights represented  thereby,  any notice to the contrary  notwithstanding.  When
Warrant  Certificates  are  presented  to the  Warrant  Agent  with a request to
register  the  transfer or to exchange  them for an equal  amount of Warrants of
other authorized  denominations,  the Warrant Agent shall register such transfer
or make such exchange as requested if its requirements for such transactions are
met. To permit  registrations  of transfers  and  exchanges,  the Company  shall
execute Warrant  Certificates at the Warrant Agent's request.  No service charge
shall be made for any registration of transfer or exchange of Warrants,  but the
Company  may  require  payment  of a sum  sufficient  to cover  any tax or other
governmental  charge that may be imposed in connection with any  registration of
transfer of Warrants.

          SECTION 8.2. Intentionally Omitted.

          SECTION 8.3. SPECIAL  TRANSFER  PROVISIONS.  The following  provisions
shall apply:

          (a)  TRANSFERS  TO QIBS.  The  following  provisions  shall apply with
respect to the  registration of any proposed  transfer of Warrants to a QIB: the
Warrant Agent shall only register the transfer if such transfer is being made by
a  proposed  transferor  who has  checked  the box  provided  for on the form of
Warrant  Certificate  stating,  or has  otherwise  advised  the  Company and the
Warrant  Agent in writing,  that the sale has been made in  compliance  with the
provisions  of  Rule  144A to a  transferee  who has  signed  the  certification
provided  for on the  form of  Warrant  Certificate  stating,  or has  otherwise
advised the Company and the Warrant Agent in writing,  that it is purchasing the
Warrants  for its own account or an account  with  respect to which it exercises
sole investment  discretion and that it and any such account is a QIB within the
meaning of Rule 144A, and is aware that the sale to it is being made in reliance
on Rule 144A and acknowledges  that it has received such  information  regarding
the Company as it has requested  pursuant to Rule 144A or has  determined not to
request such  information  and that it is aware that the  transferor  is relying
upon  its  foregoing  representations  in  order to  claim  the  exemption  from
registration provided by Rule 144A.

                                       21
<PAGE>

          (b) TRANSFERS TO ANY OTHER PERSON. The following provision shall apply
with respect to the  registration  of any  proposed  transfer of Warrants to any
Person  not  specified  in  paragraph  (a) above  (including  any  Institutional
Accredited Investor which is not a QIB).

          (i) The Warrant Agent shall register any proposed transfer of Warrants
     to any such Person only if (x) the  transferor has delivered to the Warrant
     Agent and the Company a  certificate  substantially  in the form of Exhibit
     B-1 hereto and, if required by paragraph (d) thereof, an Opinion of Counsel
     to the  effect  set  forth  therein  and (y) the  proposed  transferee  has
     delivered to the Warrant Agent and the Company a certificate  substantially
     in the form of Exhibit B-2 hereto.

          (c) PRIVATE  PLACEMENT  LEGEND.  Upon the  registration  of  transfer,
exchange  or  replacement  of  Warrant  Certificates  not  bearing  the  Private
Placement Legend,  the Warrant Agent shall deliver Warrant  Certificates that do
not bear the  Private  Placement  Legend.  Upon the  registration  of  transfer,
exchange or replacement of Warrant  Certificates  bearing the Private  Placement
Legend, the Warrant Agent shall deliver only Warrant  Certificates that bear the
Private  Placement  Legend  unless there is  delivered  to the Warrant  Agent an
Opinion of Counsel reasonably  satisfactory to the Company,  its Counsel and the
Warrant   Agent  to  the  effect  that  neither  such  legend  nor  the  related
restrictions  on transfer are required in order to maintain  compliance with the
provisions of the Securities Act.

          (d) GENERAL.  (i) By its  acceptance of any Warrants  represented by a
Warrant  Certificate  bearing the Private Placement Legend,  each Holder of such
Warrants acknowledges the restrictions on transfer of such Warrants set forth in
this  Agreement  and in the  Private  Placement  Legend and agrees  that it will
transfer  such Warrants  only as provided in this  Agreement.  The Warrant Agent
shall not register a transfer of any Warrants unless such transfer complies with
the  restrictions on transfer of such Warrants set forth in this  Agreement.  In
connection  with any transfer of Warrants,  each Holder agrees by its acceptance
of Warrants to furnish the  Warrant  Agent or the Company  such  certifications,
legal opinions or other information as either of them may reasonably  require to
confirm that such  transfer is being made  pursuant to an exemption  from,  or a
transaction not subject to, the registration  requirements of the Securities Act
or any applicable laws of any state or foreign  jurisdiction;  provided that the
Warrant  Agent  shall  not  be  required  to  determine   (but  may  rely  on  a
determination  made by the Company with respect to) the  sufficiency of any such
certifications, legal opinions or other information.

          (ii) The Warrant Agent shall retain,  in accordance with its customary
procedure,  copies of all  letters,  notices  and other  written  communications
received  pursuant to Section 8.2 hereof or this Section 8.3. The Company  shall
have the right to inspect and make copies of all such letters,  notices or other
written  communications  at any  reasonable  time upon the giving of  reasonable
written notice to the Warrant Agent.

                                       22
<PAGE>

          SECTION   8.4.   SURRENDER  OF  WARRANT   CERTIFICATES.   Any  Warrant
Certificate  surrendered for  registration of transfer,  exchange or exercise of
the Warrants  represented  thereby  shall,  if  surrendered  to the Company,  be
delivered to the Warrant Agent, and all Warrant  Certificates  surrendered or so
delivered to the Warrant Agent shall be promptly  cancelled by the Warrant Agent
and shall not be reissued by the Company and, except as provided in this Article
VIII in case of an exchange,  Article III hereof in case of the exercise of less
than all the Warrants  represented  thereby or Article VI in case of a mutilated
Warrant  Certificate,  no Warrant  Certificate shall be issued hereunder in lieu
thereof.  The Warrant  Agent shall  deliver to the Company  from time to time or
otherwise  dispose of such  cancelled  Warrant  Certificates  as the Company may
direct in writing.

          SECTION 8.5.  TAG-ALONG  RIGHT. (a) If any Principal Holder intends to
transfer to any Person  (other than another  Person that is included  within the
defined group of such Principal Holder,  provided that such transferee agrees in
writing to be bound by the terms of this Section 8.5 and new stock  certificates
containing a restrictive  legend referring to the transfer  restrictions of this
Section 8.5 are issued to such transferee) (the "TAG-ALONG  PURCHASER"),  in one
transaction or a series of related transactions  (excluding securities offerings
registered under the Securities Act), shares of Capital Stock  constituting,  in
the aggregate,  more than 20% of the total number of shares of Common Stock on a
Fully  Diluted  Basis  owned  by such  Principal  Holder  as of the date of this
Agreement,  then such  Principal  Holder  shall  permit  the  Purchaser,  at the
Purchaser's  option, to transfer,  for the same  consideration,  and on the same
terms and  conditions,  if any,  upon  which the  Principal  Holder  intends  to
transfer  such  shares,  a number of shares of Common  Stock  (including  shares
subject to then exercisable  Warrants and Warrants that will become  exercisable
as a result of such  transaction  or series of  transactions)  then owned by the
Purchaser  determined in  accordance  with this Section  8.5(a) (the  "TAG-ALONG
SHARES").  The Purchaser shall have the right,  pursuant to this Section 8.5(a),
to sell  pursuant to the offer by the Tag-Along  Purchaser,  a percentage of the
shares of Common Stock (including  shares subject to then exercisable  Warrants)
held by the Purchaser equal to the Applicable Percentage.

          (b)  For  purposes  hereof,  the  "APPLICABLE   PERCENTAGE"  shall  be
determined as follows:

          (i) if such transaction or series of related transactions  constitutes
the  first  instance  in which  the  rights  under  Section  8.5(a)  apply,  the
Applicable  Percentage  shall be  equal to the  percentage  of the  holdings  of
Capital Stock (on a Fully Diluted Basis) then owned by the applicable  Principal
Holder being  transferred in such transaction or series of related  transactions
by such Principal Holder (the "APPLICABLE HOLDER" for such transaction(s));

          (ii) if such  transaction or series of related  transactions  does not
constitute  the first  instance in which the rights under Section  8.5(a) apply,
the  Applicable  Percentage  shall be equal to the percentage of the holdings of
Capital Stock (on a Fully  Diluted  Basis) then owned by the  Applicable  Holder
being  transferred in such transaction or series of related  transactions by the
Applicable Holder;  provided that the Applicable Percentage shall be zero if the
percentage  of the  holdings of Capital  Stock (on a Fully  Diluted  Basis) then
owned by the Applicable  Holder being  transferred in such transaction or series
of  related  transactions  by the  Applicable  Holder is not  greater  than five
percent.

                                       23
<PAGE>

          (c) Not less than 15  Business  Days  prior to any  proposed  transfer
pursuant  to this  Section  8.5,  the  Principal  Holders  shall  deliver to the
Purchaser  written notice thereof (the "TAG-ALONG  NOTICE"),  which notice shall
set forth the consideration to be paid by the Tag-Along  Purchaser and the other
terms and conditions,  if any, of such  transaction.  If the Purchaser elects to
transfer some or all of the Tag-Along  Shares pursuant to this Section 8.5, then
(i) the Purchaser shall so notify the Principal  Holders within 10 Business Days
after the date of the Purchaser's  receipt of Tag-Along Notice, and, (ii) at the
Principal Holders' request not less than two Business Days prior to the proposed
transfer, the Purchaser shall deliver to counsel to the Principal Holders, to be
held in escrow,  certificates  representing  such Tag-Along Shares (and/or other
appropriate  documentation to permit the exercise of Warrants), duly endorsed or
with duly  completed  and  executed  stock powers  attached,  in proper form for
transfer,  together with a limited  power-of-attorney  authorizing the Principal
Holders  to  transfer  the  Tag-Along  Shares  to the  Tag-Along  Purchaser  (in
accordance with the terms and conditions set forth in the Tag-Along  Notice) and
to execute all other  documents  required to be executed in connection with such
transaction.

          (d) If,  within 30  Business  Days after the  Purchaser  notifies  the
Principal  Holder of the  Purchaser's  election to  transfer  some or all of its
Tag-Along  Shares,  no  transfer  of shares  held by the  Principal  Holders and
Tag-Along  Shares in  accordance  with the  provisions of this Section 8.5 shall
have  been  completed,  then the  Purchaser  shall  have  the  right at any time
thereafter to revoke its prior election relating to the Tag--Along Shares.  Upon
any such  revocation,  or earlier if the Principal Holder shall determine not to
proceed with such transfer,  then the Principal  Holder's counsel shall promptly
return to the  Purchaser,  in proper form,  all  certificates  representing  the
Tag-Along Shares and the limited  power-of-attorney  previously delivered by the
Purchaser  to the  Principal  Holders.  If,  within 30  Business  Days after the
Purchaser  notifies  the  Principal  Holder of the  Purchaser's  decision not to
transfer any Tag--Along  Shares (or, if no such notice is given,  the expiration
of the 10 Business  Day period for notice of an election to transfer  Tag--Along
Shares),  no transfer of shares held by the  Principal  Holders  shall have been
completed in accordance with the Tag--Along  Notice,  then the Principal Holders
must comply again with all of the  provisions  of this  Section  8.5,  including
without  limitation  a new  Tag--Along  Notice and another  opportunity  for the
Purchaser to elect to transfer Tag--Along Shares.

          (e)  Concurrently  with  the  consummation  of  the  transfer  of  the
Tag-Along Shares pursuant to this Section 8.5, the Principal Holders shall remit
or cause to be remitted to the Purchaser the  consideration  with respect to the
Tag-Along  Shares so  transferred  and shall furnish such other  evidence of the
completion of such transfer and the terms and conditions (if any) thereof as may
reasonably be requested by the Purchaser.

                                       24
<PAGE>

          (f) The  provisions  of this  Section  8.5  shall  remain  in  effect,
notwithstanding  any return to the  Purchaser  of  Tag-Along  Shares as provided
herein.

          (g) Notwithstanding the exercise date described in Section 3.2, in the
event that the  Purchaser  holds  Warrants that are not then  exercisable  under
Section 3.2 and the Purchaser would be entitled to tag-along  rights pursuant to
this Section 8.5 if such Warrants  were  exercisable,  then such Warrants  shall
become exercisable, at the election of the Purchaser, to the extent necessary to
permit the Purchaser to utilize all of such tag-along rights. Alternatively, the
Purchaser shall be entitled to transfer to the Tag-Along  Purchaser such portion
of its  Warrants  representing  the number of  Tag-Along  Shares  which would be
transferred  to the Tag-Along  Purchaser if such Warrants were  exercisable,  in
exchange  for the  consideration  which  would be payable  with  respect to such
Tag-Along Shares, less the Exercise Price for such Warrants.

          SECTION 8.6.  BRING ALONG RIGHT.  If the Company or one or more of the
Existing  Stockholders  receives a bona fide offer from a person or persons  not
then an Affiliate or Affiliates of the Company or such Existing  Stockholders (a
"Third Party Purchaser") to purchase Capital Stock representing more than 50% of
the total number of shares of Common Stock then  outstanding  on a Fully Diluted
Basis,  then the  Company  shall have the right to  deliver a written  notice (a
"Buyout Notice") to the Purchaser which shall state (i) that the Company or such
Existing  Stockholders  propose to effect such  transaction,  (ii) the  proposed
purchase  price  per  share  of  Capital  Stock  to be paid by the  Third  Party
Purchaser,  and (iii) the name or names of the Third Party Purchaser,  and which
attaches  a  copy  of  all  writings   between  the  Company  or  such  Existing
Stockholders  and the other parties to such  transaction  necessary to establish
the terms of such  transaction.  The  Purchaser  agrees that,  upon receipt of a
Buyout  Notice,  the  Purchaser  shall be obligated to sell a percentage  of its
shares of Common Stock equal to the Bring Along  Percentage  (as defined  below)
upon the  terms and  conditions  of such  transaction  (and  otherwise  take all
necessary action to cause consummation of the proposed  transaction);  provided,
however,  that the Purchaser  shall only be obligated as provided  above in this
Section 8.6 if (i) more than 50% of the total  number of shares of Common  Stock
then  outstanding  on a Fully Diluted Basis  actually is sold to the Third Party
Purchaser  pursuant  to the  terms  contained  in the  Buyout  Notice,  (ii) the
Purchaser receives the same per share (or per share equivalent) consideration as
the Company or such Existing  Stockholders  receive in the transaction and (iii)
the  consideration  received  by the  Purchaser  is in the  form  of  cash  or a
combination  of cash and  securities  that will  become  freely  tradable in the
public  securities  markets within 180 days of receipt of such  consideration by
the Purchaser.  The Bring Along  Percentage shall be the percentage of the total
number of shares of Common Stock  outstanding  an a Fully  Diluted Basis that is
actually sold to the Third Party  Purchaser  pursuant to the terms  contained in
the Buyout  Notice;  provided  that if,  after giving  effect to such sale,  the
Existing   Stockholders   would  own  not  more  than  twenty   percent  of  the
fully-diluted common equity interests in the Company, the Bring Along Percentage
shall be one hundred percent.


                                       25
<PAGE>

                                   ARTICLE IX

                                 WARRANT HOLDERS

          SECTION 9.1. WARRANT HOLDER DEEMED NOT A SHAREHOLDER.  The Company and
the Warrant  Agent may deem and treat the  registered  Holder(s)  of the Warrant
Certificates as the absolute owner(s) thereof  (notwithstanding  any notation of
ownership  or other  writing  thereon  made by  anyone),  for the purpose of any
exercise  thereof  and for all other  purposes,  and neither the Company nor the
Warrant  Agent nor any agent  thereof  shall be  affected  by any  notice to the
contrary. Accordingly, the Company and/or the Warrant Agent shall not, except as
ordered by a court of  competent  jurisdiction  as  required by law, be bound to
recognize  any  equitable  or other claim to or interest in the  Warrants on the
part of any Person other than such  registered  Holder,  whether or not it shall
have  express  or other  notice  thereof.  Prior to the  valid  exercise  of the
Warrants, no Holder of a Warrant Certificate,  as such, shall be entitled to any
rights of a shareholder of the Company, including, without limitation, the right
to vote or to consent to any action of the shareholders, to receive dividends or
other  distributions,  to exercise any preemptive right or to receive any notice
of meetings of shareholders and, except as otherwise provided in this Agreement,
shall not be entitled to receive any notice of any proceedings of the Company.

          SECTION  9.2.  RIGHT OF ACTION.  All rights of action with  respect to
this Agreement are vested in the Holders of the Warrants,  and any Holder of any
Warrant,  without the  consent of the Warrant  Agent or the Holders of any other
Warrant,  may, on such  Holder's  own behalf and for such  Holder's own benefit,
enforce,  and may institute and maintain any suit, action or proceeding  against
the Company suitable to enforce, or otherwise in respect of, such Holder's right
to  exercise  such  Warrants in the manner  provided in the Warrant  Certificate
representing such Warrants and in this Agreement.

                                    ARTICLE X

                                THE WARRANT AGENT

          SECTION 10.1. DUTIES AND LIABILITIES. The Warrant Agent hereby accepts
the agency established by this Agreement and agrees to perform the same upon the
terms and  conditions  herein set  forth,  by all of which the  Company  and the
Holders of Warrants,  by their acceptance  thereof,  shall be bound. The Warrant
Agent  shall not, by  countersigning  Warrant  Certificates  or by any other act
hereunder,  be  deemed  to  make  any  representations  as to  the  validity  or
authorization  of the  Warrants  or the Warrant  Certificates  (except as to its
countersignature  thereon) or of any Common  Shares  issued upon exercise of any
Warrant,  or as to the accuracy of the  computation of the Exercise Price or the
number or kind or  amount of Common  Shares  deliverable  upon  exercise  of any
Warrant or the  correctness  of the  representations  of the Company made in the
certificates  that the Warrant  Agent  receives.  The Warrant Agent shall not be
accountable  for the use or  application  by the Company of the  proceeds of the
exercise of any Warrant.  The Warrant Agent shall not have any duty to calculate


                                       26
<PAGE>

or determine any  adjustments  with respect to either the Exercise  Price or the
kind and amount of Common  Shares  receivable  by Holders  upon the  exercise of
Warrants  required from time to time and the Warrant Agent shall have no duty or
responsibility  in determining the accuracy or correctness of such  calculation.
The Warrant  Agent shall not be (a) liable for any recital or  statement of fact
contained  herein  or in the  Warrant  Certificates  or for  any  action  taken,
suffered  or  omitted  by it in  good  faith  in the  belief  that  any  Warrant
Certificate  or any other  documents or any  signatures  are genuine or properly
authorized, (b) responsible for any failure on the part of the Company to comply
with any of its covenants and obligations  contained in this Agreement or in the
Warrant  Certificates  or (c) liable for any act or omission in connection  with
this  Agreement  except  for its own  gross  negligence,  bad  faith or  willful
misconduct.  The Warrant Agent is hereby authorized to accept  instructions with
respect to the  performance  of its duties  hereunder  from the  Chairman of the
Board, the Vice Chairman of the Board, the President,  Chief Executive  Officer,
the Chief Operating Officer, the Chief Financial Officer, or any other executive
officer of the Company and to apply to any such officer for instructions  (which
instructions  will be promptly given in writing when  requested) and the Warrant
Agent shall not be liable for any action  taken or suffered to be taken by it in
good faith in accordance with the  instructions  of any such officer;  provided,
however, that, in its discretion, the Warrant Agent may, in lieu thereof, accept
other evidence of such or may require such further or additional  evidence as it
may deem reasonable.  The Warrant Agent shall not be liable for any action taken
with  respect  to any  matter in the  event it  requests  instructions  from the
Company  as to that  matter  and does not  receive  such  instructions  within a
reasonable period of time after the request therefor.

          The  Warrant  Agent may  execute  and  exercise  any of the rights and
powers hereby vested in it or perform any duty hereunder  either itself or by or
through its attorneys,  agents or employees,  and the Warrant Agent shall not be
answerable or  accountable  for any act,  default,  neglect or misconduct of any
such  attorneys,  agents or employees;  provided that  reasonable  care has been
exercised with respect to the retention of any such attorney, agent or employee.
The Warrant Agent shall not be under any obligation or duty to institute, appear
in or defend any action,  suit or legal  proceeding  in respect  hereof,  unless
first  indemnified  to its  reasonable  satisfaction.  The  Warrant  Agent shall
promptly  notify the  Company  in  writing of any claim made or action,  suit or
proceeding  instituted  against it  arising  out of or in  connection  with this
Agreement.

          The Company will perform, execute, acknowledge and deliver or cause to
be delivered all such further acts, instruments and assurances as are consistent
with this  Agreement  and as may  reasonably be required by the Warrant Agent in
order to enable it to carry out or perform its duties under this Agreement.

          The Warrant Agent shall act solely as agent of the Company  hereunder.
The  Warrant  Agent shall not be liable  except for the failure to perform  such
duties as are  specifically  set  forth  herein,  and no  implied  covenants  or
obligations shall be read into this Agreement  against the Warrant Agent,  whose
duties and  obligations  shall be  determined  solely by the express  provisions
hereof.

                                       27
<PAGE>

          SECTION 10.2. RIGHT TO CONSULT  COUNSEL.  The Warrant Agent may at any
time consult with legal counsel (who may be legal counsel for the Company),  and
the  written  opinion  or  advice  of such  counsel  shall be full and  complete
authorization  and  protection  to the Warrant Agent and the Warrant Agent shall
incur no  liability  or  responsibility  to the Company or to any Holder for any
action  taken,  suffered or omitted by it in good faith in  accordance  with the
opinion or advice of such counsel.

          SECTION  10.3.  COMPENSATION;   INDEMNIFICATION.  The  Company  agrees
promptly  to pay the  Warrant  Agent from time to time and in any case within 30
days of receipt of an invoice,  compensation  for its services  hereunder as the
Company and the Warrant  Agent may agree from time to time,  and to reimburse it
upon  its  request  (which  shall  be   accompanied  by  reasonable   supporting
documentation)  for reasonable fees or expenses and reasonable  counsel fees and
expenses  incurred in connection with the execution and  administration  of this
Agreement,  and  further  agrees  to  indemnify  the  Warrant  Agent and save it
harmless against any losses,  liabilities or reasonable  expenses arising out of
or in connection  with the  acceptance  and  administration  of this  Agreement,
including,   without   limitation,   the   reasonable   costs  and  expenses  of
investigating or defending any claim of such liability,  except that the Company
shall have no liability hereunder to the extent that any such loss, liability or
expense  results  from the Warrant  Agent's own gross  negligence,  bad faith or
willful misconduct. The obligations of the Company under this Section 10.3 shall
survive the exercise and the expiration of the Warrants, the termination of this
Agreement  and the  resignation  or removal of the  Warrant  Agent in respect of
services or expenses incurred in connection with the Warrants or this Agreement.

          SECTION 10.4. NO  RESTRICTIONS  ON ACTIONS.  Nothing in this Agreement
shall be deemed to prevent  the  Warrant  Agent and any  shareholder,  director,
officer or employee of the Warrant Agent from buying,  selling or dealing in any
of the  Warrants or other  securities  of the  Company or  becoming  pecuniarily
interested  in  transactions  in  which  the  Company  may  be  interested,   or
contracting  with or lending  money to the Company or otherwise  acting as fully
and freely as though it were not the Warrant Agent under this Agreement. Nothing
herein shall  preclude the Warrant  Agent from acting in any other  capacity for
the Company or for any other legal entity.

          SECTION 10.5.  DISCHARGE OR REMOVAL;  REPLACEMENT  WARRANT AGENT.  The
Warrant  Agent may resign from its position as such and be  discharged  from all
further duties and liabilities  hereunder  (except liability arising as a result
of the Warrant Agent's own gross negligence,  bad faith or willful  misconduct),
after giving one month's prior written notice to the Company. The Company may at
any time remove the Warrant Agent upon one month's written notice specifying the
date  when such  discharge  shall  take  effect,  and the  Warrant  Agent  shall
thereupon in like manner be discharged  from all further duties and  liabilities
hereunder, except as aforesaid. The Warrant Agent shall mail to each Holder of a
Warrant,  at the  Company's  expense,  a copy of said notice of  resignation  or
notice of  removal,  as the case may be.  Upon such  resignation  or removal the
Company shall appoint in writing a new warrant agent.  If the Company shall fail


                                       28
<PAGE>

to make such  appointment  within a period of 30 days after it has been notified
in writing of such  resignation  by the  resigning  Warrant  Agent or after such
removal,  then the  resigning  or  removed  Warrant  Agent or the  Holder of any
Warrant may apply to any court of competent  jurisdiction for the appointment of
a new warrant agent.  After 30 days from receipt of, or giving,  notice,  as the
case may be, and pending  appointment  of a successor  to the  original  Warrant
Agent, either by the Company or by such a court, the duties of the Warrant Agent
shall be carried out by the Company. Any new warrant agent, whether appointed by
the Company or by such a court,  shall be a bank or trust company doing business
under the laws of the United States or any state  thereof,  in good standing and
having a combined capital and surplus of not less than $25,000,000. The combined
capital  and  surplus of any such new  warrant  agent  shall be deemed to be the
combined  capital and surplus as set forth in the most recent  annual  report of
its condition published by such warrant agent prior to its appointment, provided
that such  reports are  published  at least  annually  pursuant to law or to the
requirements  of a federal or state  supervising or examining  authority.  After
acceptance in writing of such  appointment by the new warrant agent, it shall be
vested with the same powers,  rights,  duties and  responsibilities as if it had
been  originally  named  herein  as  the  Warrant  Agent,  without  any  further
assurance, conveyance, act or deed; however, the original Warrant Agent shall in
all events  deliver and  transfer to the  successor  Warrant  Agent all property
(including, without limitation,  documents and recorded information), if any, at
the time held  hereunder by the original  Warrant Agent and if for any reason it
shall be necessary  or  expedient to execute and deliver any further  assurance,
conveyance,  act or deed,  the same shall be done at the  expense of the Company
and shall be legally and validly  executed  and  delivered  by the  resigning or
removed  Warrant  Agent.   Not  later  than  the  effective  date  of  any  such
appointment, the Company shall file notice thereof with the resigning or removed
Warrant  Agent and shall use its  reasonable  best efforts to forthwith  cause a
copy of such notice to be mailed by the  successor  Warrant Agent to each Holder
of a Warrant.  Failure to give any notice  provided  for in this  Section  10.5,
however, or any defect therein, shall not affect the legality or validity of the
resignation of the Warrant Agent or the  appointment of a new warrant agent,  as
the case may be. No  Warrant  Agent  hereunder  shall be liable  for any acts or
omissions of any successor Warrant Agent.

          SECTION 10.6.  SUCCESSOR WARRANT AGENT. Any corporation into which the
Warrant  Agent or any new  warrant  agent  may be merged  or  converted,  or any
corporation  resulting from any  consolidation to which the Warrant Agent or any
new  warrant  agent  shall be a party or any  corporation  succeeding  to all or
substantially all the corporate agency business of the Warrant Agent, shall be a
successor  Warrant Agent under this Agreement  without any further act, provided
that such  corporation  would be eligible  for  appointment  as successor to the
Warrant Agent under the  provisions of Section 10.5 hereof.  Any such  successor
Warrant Agent shall  promptly cause notice of its succession as Warrant Agent to
be mailed to each Holder of a Warrant.



                                       29
<PAGE>

                                   ARTICLE XI

                                  MISCELLANEOUS

          SECTION 11.1.  MONIES  DEPOSITED WITH THE WARRANT  AGENT.  The Warrant
Agent shall not be required to pay interest on any monies deposited  pursuant to
the provisions of this  Agreement  except such as it shall agree in writing with
the Company to pay thereon.  Any monies,  securities or other  property which at
any time shall be  deposited  by the  Company or on its behalf  with the Warrant
Agent pursuant to this Agreement shall be and are hereby  assigned,  transferred
and set over to the  Warrant  Agent in trust  for the  purpose  for  which  such
monies, securities or other property shall have been deposited; but such monies,
securities or other property need not be segregated from other funds, securities
or other property except to the extent  required by law. Any monies,  securities
or other property  deposited with the Warrant Agent for payment or  distribution
to the Holders  that remains  unclaimed  for one year after the date the monies,
securities  or other  property  was  deposited  with the Warrant  Agent shall be
delivered to the Company upon its request therefor.

          SECTION  11.2.  PAYMENT OF TAXES.  Subject  to Article VI hereof,  all
Common Shares  issuable upon the exercise of Warrants  shall be validly  issued,
fully paid and not subject to any calls for funds, and the Company shall pay any
taxes and other  governmental  charges that may be imposed under the laws of the
United  States of  America  or any  political  subdivision  or taxing  authority
thereof or therein in respect of the issue or delivery  thereof upon exercise of
Warrants (other than income taxes imposed on the Holders). The Company shall not
be required,  however, to pay any tax or other charge imposed in connection with
any  transfer  involved  in the  issue  of any  certificate  for  Common  Shares
(including  other  securities  or  property  issuable  upon the  exercise of the
Warrants)  or payment  of cash to any Person  other than the Holder of a Warrant
Certificate  surrendered  upon the  exercise  of a  Warrant  and in case of such
transfer or payment,  the Warrant Agent and the Company shall not be required to
issue any share  certificate  or pay any cash  until such tax or charge has been
paid or it has  been  established  to the  Warrant  Agent's  and  the  Company's
satisfaction that no such tax or charge is due.

          SECTION  11.3.  NO  MERGER,  CONSOLIDATION  OR SALE OF  ASSETS  OF THE
COMPANY. Except as otherwise provided herein, the Company will not merge into or
consolidate with any other Person,  or sell or otherwise  transfer its property,
assets and business  substantially as an entirety to a successor of the Company,
unless the Person resulting from such merger or consolidation, or such successor
of the Company,  shall expressly assume, by supplemental  agreement satisfactory
in form to the Warrant  agent and executed and  delivered to the Warrant  Agent,
the due and punctual  performance  and observance of each and every covenant and
condition of this  Agreement  or  contained in the Warrants to be performed  and
observed by the Company.

          SECTION  11.4.  REPORTS  TO  HOLDERS.  Whether  or not the  Company is
required to file reports with the  Commission,  the Company  shall file with the
Commission  all reports and other  information it would be required to file with
the  Commission  by Section  13(a) or 15(d)  under the  Exchange  Act if it were


                                       30
<PAGE>

subject  thereto.  The Company shall supply the Warrant Agent and each Holder or
shall supply to the Warrant Agent for  forwarding  to each such Holder,  without
cost to such Holder, copies of such reports and other information.  In addition,
at all times, upon the request of any Holder or any prospective purchaser of the
Warrants designated by a Holder, the Company shall supply to such Holder or such
prospective  purchaser  the  information  required  under  Rule  144A  under the
Securities Act.

          SECTION 11.5.  NOTICES;  PAYMENT.  (a) Except as otherwise provided in
Section  11.5(b)  hereof,  any  notice,  demand or delivery  authorized  by this
Agreement  shall be  sufficiently  given or made when  mailed,  if sent by first
class  mail,  postage  prepaid,  addressed  to any  Holder of a Warrant  at such
Holder's last known address appearing on the register of the Company  maintained
by the Warrant Agent and to the Company or the Warrant Agent as follows:

                  To the Company:

                  KMC Telecom Holdings, Inc.
                  1545 Route 206, Suite 300
                  Bedminster, NJ  07921
                  Attention:  James D. Glenfell
                  Chief Financial Officer



                                       31
<PAGE>



                  To the Purchaser:

                  First Union Investors, Inc.
                  1 First Union Center,
                  5th Floor
                  301 South College
                  Charlotte, NC  28288
                  Attn:    L. Watts Hamrick, III



                  To the Warrant Agent:

                  The Chase Manhattan Bank
                  450 West 33rd St., 15th Floor
                  New York, NY  10001-2697
                  Attention:  Capital Markets Fiduciary Services

or such other address as shall have been furnished to the party giving or making
such notice, demand or delivery.  Any notice that is mailed in the manner herein
provided  shall be  conclusively  presumed to have been duly given when  mailed,
whether or not the Holder receives the notice.

          (b) Payment of the Exercise  Price should be made in  accordance  with
the  provisions  of this  Agreement at the office of the Warrant Agent set forth
above.

          (c) Any notice  required  to be given by the  Company  to the  Holders
shall be made by mailing to the Holders at their last known addresses  appearing
on the register  maintained by the Warrant Agent. The Company hereby irrevocably
authorizes the Warrant Agent, in the name and at the expense of the Company,  to
mail any such notice upon receipt  thereof from the Company.  Any notice that is
mailed in the manner herein provided shall be conclusively presumed to have been
duly given when mailed, whether or not the Holder receives the notice.

          SECTION 11.6. BINDING EFFECT. This Agreement shall be binding upon and
inure to the benefit of the Company and the Warrant  Agent and their  respective
successors  and  assigns,  and the  Holders  from time to time of the  Warrants.
Nothing in this  Agreement  is intended or shall be construed to confer upon any
Person,  other  than the  Company,  the  Warrant  Agent and the  Holders  of the
Warrants, any right, remedy or claim under or by reason of this Agreement or any
part hereof.

                                       32
<PAGE>

          SECTION 11.7. COUNTERPARTS. This Agreement may be executed manually or
by  facsimile  in any number of  counterparts,  each of which shall be deemed an
original, but all of which together constitute one and the same instrument.

          SECTION 11.8.  AMENDMENTS.  The Warrant Agent may, without the consent
or  concurrence  of the Holders of the Warrants,  by  supplemental  agreement or
otherwise,  join with the Company in making any changes or  corrections  in this
Agreement  that  (a) are  required  to cure  any  ambiguity  or to  correct  any
defective or inconsistent  provision or clerical omission or mistake or manifest
error herein contained or (b) add to the covenants and agreements of the Company
in this Agreement further covenants and agreements of the Company  thereafter to
be observed,  or surrender any rights or power reserved to or conferred upon the
Company  in this  Agreement;  provided  that in  either  case  such  changes  or
corrections  do not and will not adversely  affect,  alter or change the rights,
privileges or immunities  of the Holders of Warrants.  Upon the Warrant  Agent's
request, the Company shall promptly provide an Officer's Certificate and Opinion
of Counsel  which  provide  that all  conditions  precedent  to  adoption  of an
amendment have been satisfied.

          SECTION  11.9.  HEADINGS.  The  descriptive  headings  of the  several
Sections of this  Agreement  are  inserted  for  convenience  only and shall not
control or affect the meaning or construction of any of the provisions hereof.

          SECTION  11.10.  COMMON  SHARES  LEGEND.  Unless  and until the Common
Shares  issuable  upon the  exercise of the Warrants  are  registered  under the
Securities  Act,  or unless  otherwise  agreed  by the  Company  and the  Holder
thereof, such Common Shares will bear a legend to the following effect:

     THE COMMON SHARES  REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
     UNDER THE U.S.  SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES  ACT"),
     OR ANY STATE SECURITIES LAWS, AND  ACCORDINGLY,  MAY NOT BE OFFERED,  SOLD,
     PLEDGED  OR  OTHERWISE  TRANSFERRED  EXCEPT AS SET  FORTH IN THE  FOLLOWING
     SENTENCE.  BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A) IT
     IS A  "QUALIFIED  INSTITUTIONAL  BUYER" (AS  DEFINED IN RULE 144A UNDER THE
     SECURITIES  ACT) OR (B) IT IS AN  INSTITUTIONAL  "ACCREDITED  INVESTOR" (AS
     DEFINED  IN RULE  501(a)(1),  (2),  (3) OR (7) OF  REGULATION  D UNDER  THE
     SECURITIES ACT) (AN "INSTITUTIONAL  ACCREDITED INVESTOR"),  (2) AGREES THAT
     IT WILL NOT, WITHIN THE TIME PERIOD REFERRED TO IN RULE 144(k) (TAKING INTO
     ACCOUNT  THE  PROVISIONS  OF RULE  144(d)  UNDER  THE  SECURITIES  ACT,  IF
     APPLICABLE),  AS IN  EFFECT  WITH  RESPECT  TO  SUCH  TRANSFER,  RESELL  OR
     OTHERWISE TRANSFER THE COMMON SHARES REPRESENTED BY THIS CERTIFICATE EXCEPT
     (A) TO  KMC  TELECOM  HOLDINGS,  INC.  (THE  "COMPANY")  OR ANY  SUBSIDIARY
     THEREOF,  (B) TO A QUALIFIED  INSTITUTIONAL  BUYER IN COMPLIANCE  WITH RULE


                                       33
<PAGE>

     144A UNDER THE SECURITIES ACT, (C) TO AN INSTITUTIONAL  ACCREDITED INVESTOR
     THAT, PRIOR TO SUCH TRANSFER, FURNISHES TO THE TRANSFER AGENT AND REGISTRAR
     A SIGNED LETTER CONTAINING CERTAIN  REPRESENTATIONS AND AGREEMENTS RELATING
     TO THE  RESTRICTIONS  ON TRANSFER OF THE COMMON SHARES  REPRESENTED BY THIS
     CERTIFICATE  (THE FORM OF WHICH  LETTER CAN BE OBTAINED  FROM THE  TRANSFER
     AGENT AND REGISTRAR) AND AN OPINION OF COUNSEL REASONABLY ACCEPTABLE TO THE
     COMPANY THAT SUCH TRANSFER IS IN COMPLIANCE  WITH THE  SECURITIES  ACT, (D)
     PURSUANT TO THE EXEMPTION FROM REGISTRATION  PROVIDED BY RULE 144 UNDER THE
     SECURITIES ACT (IF AVAILABLE) OR (E) PURSUANT TO AN EFFECTIVE  REGISTRATION
     STATEMENT  UNDER THE  SECURITIES ACT AND (3) AGREES THAT IT WILL DELIVER TO
     EACH PERSON TO WHOM THE COMMON SHARES  REPRESENTED BY THIS  CERTIFICATE ARE
     TRANSFERRED  A  NOTICE  SUBSTANTIALLY  TO THE  EFFECT  OF THIS  LEGEND.  IN
     CONNECTION  WITH ANY  TRANSFER  OF THE COMMON  SHARES  REPRESENTED  BY THIS
     CERTIFICATE WITHIN THE TIME PERIOD REFERRED TO ABOVE, THE HOLDER MUST CHECK
     THE  APPROPRIATE BOX SET FORTH ON THE REVERSE HEREOF RELATING TO THE MANNER
     OF SUCH  TRANSFER AND SUBMIT THIS  CERTIFICATE  TO THE  TRANSFER  AGENT AND
     REGISTRAR.  IF  THE  PROPOSED  TRANSFEREE  IS AN  INSTITUTIONAL  ACCREDITED
     INVESTOR,  THE HOLDER MUST, PRIOR TO SUCH TRANSFER,  FURNISH TO EACH OF THE
     TRANSFER  AGENT AND  REGISTRAR AND THE COMPANY SUCH  CERTIFICATIONS,  LEGAL
     OPINIONS OR OTHER  INFORMATION AS EITHER OF THEM MAY REASONABLY  REQUIRE TO
     CONFIRM THAT SUCH TRANSFER IS BEING MADE PURSUANT TO AN EXEMPTION  FROM, OR
     IN A  TRANSACTION  NOT SUBJECT  TO, THE  REGISTRATION  REQUIREMENTS  OF THE
     SECURITIES ACT. THE WARRANT  AGREEMENT  CONTAINS A PROVISION  REQUIRING THE
     TRANSFER  AGENT AND  REGISTRAR  TO REFUSE TO REGISTER  ANY  TRANSFER OF THE
     SHARES OF COMMON STOCK  REPRESENTED BY THIS CERTIFICATE IN VIOLATION OF THE
     FOREGOING RESTRICTIONS.

          SECTION 11.11. THIRD PARTY  BENEFICIARIES.  The Holders shall be third
party beneficiaries to the agreements made hereunder between the Company, on the
one hand, and the Warrant  Agent,  on the other hand, and each Holder shall have
the right to  enforce  such  agreements  directly  to the  extent it deems  such
enforcement  necessary  or  advisable  to  protect  its  rights or the rights of


                                       34
<PAGE>

Holders hereunder.  By acquiring Warrants, each Holder agrees to be bound by the
obligations of Holders generally as set forth herein and as such obligations may
be applicable to such Holder.

          SECTION 11.12. TERMINATION. Except as otherwise specified herein, this
Agreement  shall  terminate at 5:00 p.m. (New York City time) on the  Expiration
Date.  Notwithstanding  the  foregoing,  this Agreement  shall  terminate on any
earlier date as of which all Warrants have been exercised.

          SECTION 11.13.  GOVERNING LAW. This Agreement shall be governed by the
laws of the State of New York.




                                       35
<PAGE>


          IN WITNESS WHEREOF,  the parties have caused this Agreement to be duly
executed, as of the day and year first above written.

                                      KMC TELECOM HOLDINGS, INC.


                                      By:   /s/ Michael A. Sternberg
                                         --------------------------------------
                                         Name:  Michael A. Sternberg
                                         Title: President



                                      THE CHASE MANHATTAN BANK, as Warrant Agent


                                      By:    /s/ Patricia Kelly
                                         --------------------------------------
                                          Name:  Patricia Kelly
                                          Title: Vice President



                                       FIRST UNION INVESTORS, INC.


                                      By:    /s/ Pearce Landry
                                         --------------------------------------
                                          Name:  Pearce A. Landry
                                          Title: Vice President


                                       NASSAU CAPITAL PARTNERS L. P.


                                      By:    /s/ John G. Quigley
                                         --------------------------------------
                                          Name:  John G. Quigley
                                          Title: Member


                                             /s/ Harold N. Kamine
                                          -------------------------------------
                                          HAROLD N. KAMINE



                                       36
<PAGE>

                                                                       EXHIBIT A
                           FORM OF WARRANT CERTIFICATE

                           KMC TELECOM HOLDINGS, INC.

                                                                 CUSIP No. _____

No. _____

                       WARRANTS TO PURCHASE COMMON SHARES

          This certifies that ______________,  or its registered assigns, is the
owner of ___________  Warrants,  each of which  represents the right to purchase
from KMC  TELECOM  HOLDINGS,  INC.,  a  Delaware  corporation  (the  "COMPANY"),
0.471756  shares of the Common Stock,  par value $0.01 per share, of the Company
(the "COMMON  SHARES") at an exercise price (the "EXERCISE  PRICE") of $0.01 per
Common  Share  (subject to  adjustment  as  provided  in the  Warrant  Agreement
hereinafter referred to below), upon surrender hereof at the office of The Chase
Manhattan  Bank,  or to its  successor,  as the warrant  agent under the Warrant
Agreement (any such warrant agent being herein called the "WARRANT AGENT"), with
the  Subscription  Form on the reverse  hereof  duly  executed,  with  signature
guaranteed  as  therein  specified  and  simultaneous  payment  in  full by wire
transfer,  in cash or by  certified  or official  bank or bank  cashier's  check
payable  to the order of the  Company.  Notwithstanding  the  foregoing,  if the
Common Shares (or other  securities)  issuable upon exercise of the Warrants are
registered   under  the  Exchange  Act,  the  Exercise  Price  may  be  paid  by
surrendering additional Warrants to the Warrant Agent having an aggregate Spread
equal to the aggregate  Exercise Price of the Warrants being  exercised.  At any
time  beginning one year after the Closing Date and on or before the  Expiration
Date, any  outstanding  Warrants may be exercised on any Business Day;  provided
that the Warrant Registration  Statement is, at the time of exercise,  effective
and  available  for the exercise of Warrants or the exercise of such Warrants is
exempt from the registration requirements of the Securities Act.

          This  Warrant  Certificate  is issued under and in  accordance  with a
Warrant  Agreement dated as of April 30, 1999 (the "WARRANT  AGREEMENT"),  among
The Chase  Manhattan  Bank,  as  Warrant  Agent,  the  Company  and First  Union
Investors,  Inc., and a Warrant  Registration Rights Agreement dated as of April
30, 1999 (the "WARRANT REGISTRATION RIGHTS AGREEMENT"),  between the Company and
First Union Investors,  Inc., and is subject to the Certificate of Incorporation
and Bylaws of the Company and to the terms and provisions  contained therein, to
all of which  terms  and  provisions  the  Holder  of this  Warrant  Certificate
consents  by  acceptance  hereof.  The terms of the  Warrant  Agreement  and the
Warrant   Registration  Rights  Agreement  are  hereby  incorporated  herein  by
reference  and made a part  hereof.  Reference  is  hereby  made to the  Warrant
Agreement and the Warrant  Registration  Rights Agreement for a full description
of the  rights,  limitations  of  rights,  obligations,  duties  and  immunities
thereunder  of the Company and the Holders of the  Warrants.  The summary of the
terms of the Warrant  Agreement and the Warrant  Registration  Rights  Agreement
contained  in this Warrant  Certificate  is qualified in its entirety by express


                                      A-1
<PAGE>

reference  to  the  Warrant  Agreement  and  the  Warrant   Registration  Rights
Agreement.  All terms used in this Warrant  Certificate  that are defined in the
Warrant Agreement and the Warrant  Registration  Rights Agreement shall have the
meanings assigned to them in such agreements.

          Copies of the Warrant  Agreement and the Warrant  Registration  Rights
Agreement  are on file at the office of the Warrant Agent and may be obtained by
writing to the Warrant Agent at the following address:

                  The Chase Manhattan Bank
                  450 West 33rd St., 15th Floor
                  New York, NY  10001-2697
                  Attention:  Capital Markets Fiduciary Services

          If the Company  merges or  consolidates  with or into, or sells all or
substantially  all of its  property  and  assets  to,  another  Person  and  the
consideration  received by holders of Common Shares consists solely of cash, the
Holders of Warrants  shall be entitled to receive  distributions  on the date of
such event on an equal basis with holders of Common Shares (or other  securities
issuable upon  exercise of the  Warrants) as if the Warrants had been  exercised
immediately prior to such event (less the Exercise Price).  Upon receipt of such
payment,  if any,  the  rights of a Holder  shall  terminate  and cease and such
Holder's Warrants shall expire.

          The number of Common  Shares  purchasable  upon the  exercise  of each
Warrant  and the price per share are  subject to  adjustment  as provided in the
Warrant Agreement.  Except as stated in the immediately preceding paragraph,  in
the event the Company merges or consolidates with, or sells all or substantially
all of its assets to, another Person, each Warrant will, upon exercise,  entitle
the Holder  thereof to  receive  the number of shares of capital  stock or other
securities  or the  amount  of money and other  property  which the  holder of a
Common  Share (or other  securities  or  property  issuable  upon  exercise of a
Warrant) is entitled to receive upon completion of such merger, consolidation or
sale.

          As to any final  fraction  of a share  which the same Holder of one or
more Warrant  Certificates would otherwise be entitled to purchase upon exercise
thereof in the same  transaction,  the  Company  may pay the cash value  thereof
determined as provided in the Warrant Agreement.

          Subject to  Article VI of the  Warrant  Agreement,  all Common  Shares
issuable by the Company upon the exercise of Warrants  shall be validly  issued,
fully paid and not subject to any calls for funds, and the Company shall pay any
taxes and other  governmental  charges that may be imposed under the laws of the
United  States of  America  or any  political  subdivision  or taxing  authority
thereof or therein in respect of the issue or delivery  thereof upon exercise of
Warrants (other than income taxes imposed on the Holders). The Company shall not
be required,  however, to pay any tax or other charge imposed in connection with
any  transfer  involved  in the  issue  of any  certificate  for  Common  Shares
(including  other  securities  or  property  issuable  upon the  exercise of the


                                       A-2
<PAGE>

Warrants)  or payment  of cash to any Person  other than the Holder of a Warrant
Certificate  surrendered  upon the  exercise  of a  Warrant  and in case of such
transfer or payment,  the Warrant Agent and the Company shall not be required to
issue any share  certificate  or pay any cash  until such tax or charge has been
paid or it has  been  established  to the  Warrant  Agent's  and  the  Company's
satisfaction that no such tax or charge is due.

          Subject to the restrictions on and conditions to transfer set forth in
Articles II and VIII of the Warrant Agreement,  this Warrant Certificate and all
rights hereunder are transferable by the registered  Holder hereof,  in whole or
in part, on the register of the Company maintained by the Warrant Agent for such
purpose at the Warrant  Agent's office in New York, New York,  upon surrender of
this Warrant  Certificate duly endorsed,  or accompanied by a written instrument
of transfer  in form  satisfactory  to the  Company  and the Warrant  Agent duly
executed,  with  signatures  guaranteed  as specified  in the  attached  Form of
Assignment,  by the registered  Holder hereof or his attorney duly authorized in
writing  and by  such  other  documentation  required  pursuant  to the  Warrant
Agreement and upon payment of any necessary  transfer tax or other  governmental
charge imposed upon such transfer.  Upon any partial transfer,  the Company will
sign and issue and the Warrant Agent will countersign and deliver to such Holder
a new Warrant  Certificate  or  Certificates  with respect to any portion not so
transferred.  Each taker and Holder of this Warrant  Certificate,  by taking and
holding the same, consents and agrees that prior to the registration of transfer
as  provided  in the Warrant  Agreement,  the Company and the Warrant  Agent may
treat the Person in whose name the Warrants are registered as the absolute owner
hereof  for any  purpose  and as the  Person  entitled  to  exercise  the rights
represented hereby, any notice to the contrary notwithstanding. Accordingly, the
Company  and/or the  Warrant  Agent  shall not,  except as ordered by a court of
competent  jurisdiction  as required by law, be bound to recognize any equitable
or other claim to or interest  in the  Warrants on the part of any Person  other
than such  registered  Holder,  whether  or not it shall  have  express or other
notice thereof.

          This Warrant Certificate may be exchanged at the office of the Warrant
Agent maintained for such purpose in New York, New York for Warrant Certificates
representing the same aggregate number of Warrants, each new Warrant Certificate
to represent such number of Warrants as the Holder hereof shall designate at the
time of such exchange.

          Prior to the valid exercise of the Warrants  represented  hereby,  the
Holder of this Warrant Certificate, as such, shall not be entitled to any rights
of a shareholder of the Company,  including,  without  limitation,  the right to
vote  or  to  consent  to  any  action  of  the  shareholders,  to  receive  any
distributions,  to exercise  any  pre-emptive  right or to receive any notice of
meetings of shareholders, and shall not be entitled to receive any notice of any
proceedings of the Company except as provided in the Warrant Agreement.

          This Warrant Certificate shall be void and all rights evidenced hereby
shall cease on February 1, 2009,  unless sooner  terminated by the  liquidation,
dissolution or winding-up of the Company or as otherwise provided in the Warrant


                                      A-3
<PAGE>

Agreement upon the  consolidation  or merger of the Company with, or sale of the
Company  to,  another  Person or unless such date is extended as provided in the
Warrant Agreement. [Balance of page intentionally left blank.]

          This Warrant  Certificate  shall not be valid for any purpose until it
shall have been countersigned by the Warrant Agent.

                                       KMC TELECOM HOLDINGS, INC.


                                       By:--------------------------
                                          Name:
                                          Title:

Dated: April __, 1999


Countersigned:

THE CHASE MANHATTAN BANK,
   as Warrant Agent


By:---------------------------
   Name:
   Title:


                                      A-4
<PAGE>




                     FORM OF REVERSE OF WARRANT CERTIFICATE

                                SUBSCRIPTION FORM

                 (To be executed only upon exercise of Warrant)

To:      The Chase Manhattan Bank
      450 West 33rd St., 15th Floor
      New York, NY  10001-2697
      Attention:  Capital Markets Fiduciary Services

          The  undersigned   irrevocably  exercises  ________  of  the  Warrants
represented by this Warrant  Certificate and herewith makes payment of $ _______
(such payment being by wire  transfer,  in cash or by certified or official bank
or bank cashier's  check payable to the order or at the direction of KMC Telecom
Holdings,  Inc. or, if the Common  Shares (or other  securities)  issuable  upon
exercise of the Warrants  are  registered  under the Exchange  Act, the exercise
price may be paid by  surrendering  additional  Warrants  to the  Warrant  Agent
having an aggregate Spread equal to the aggregate exercise price of the Warrants
being  exercised)  all at the  exercise  price and on the  terms and  conditions
specified  in this  Warrant  Certificate  and in the Warrant  Agreement  and the
Warrant  Registration  Rights  Agreement  referred to herein and surrenders this
Warrant  Certificate  and all right,  title and interest  therein to and directs
that the  shares of Common  Stock,  par value  $.01 per  share,  of KMC  Telecom
Holdings,  Inc.  (the  "COMMON  SHARES")  deliverable  upon the exercise of such
Warrants be registered or placed in the name and at the address  specified below
and delivered thereto.

                                    CHECK ONE

                  |_|   Payment made by wire transfer,  in cash, or by certified
                        or official bank or bank cashier's check.

                                       OR

                  |_|   The Common  Shares (or other  securities)  issuable upon
                        exercise  of  the  Warrants  are  registered  under  the
                        Exchange  Act and payment is being made by  surrendering
                        Warrants  having  an  aggregate   Spread  equal  to  the
                        aggregate   Exercise   Price  of  the   Warrants   being
                        exercised.


Dated:                                      -------------------------------
                                            (Signature of Owner)

                                            -------------------------------
                                            (Street Address)

                                            -------------------------------
                                            (City)     (State)   (Zip Code)


                                      A-5
<PAGE>

                                            Signature Guaranteed By:


                                            -------------------------------

Securities and/or check or other property to be issued or delivered to:

Please insert social security or identifying number:

Name:

Street Address:

City, State and Zip Code:






                                      A-6
<PAGE>

                               FORM OF ASSIGNMENT

          In  consideration of monies or other valuable  consideration  received
from the  Assignee(s)  named below,  the undersigned  registered  Holder of this
Warrant  Certificate hereby sells,  assigns,  and transfers unto the Assignee(s)
named below (including the undersigned with respect to any Warrants constituting
a part of the Warrants evidenced by this Warrant  Certificate not being assigned
hereby) all of the right of the undersigned under this Warrant Certificate, with
respect to the number of Warrants set forth below:

Name(s) of Assignee(s):  ------------------------------------

Address:  ---------------------------------------------------

No. of Warrants: --------------------------------------------

Please insert social security or other identifying number of assignee(s):

and does hereby irrevocably constitute and appoint  ------------------------ the
undersigned's  attorney to make such transfer on the books of ------------------
maintained for the purposes, with full power of substitution in the premises.

[THE FOLLOWING PROVISION TO BE INCLUDED ON ALL CERTIFICATES]

                  In connection  with any transfer of Warrants,  the undersigned
confirms that without utilizing any general  solicitation or general advertising
that:

[Check One]

|_|      (a) these  Warrants are being  transferred  in compliance  with the
             exemption from registration under the U.S.  Securities Act of 1933,
             as amended, provided by Rule 144A thereunder.
                                       OR

|_|      (b) these Warrants are being  transferred  other than in accordance
             with (a) above and documents are being  furnished which comply with
             the  conditions  of transfer set forth in this Warrant  Certificate
             and the Warrant Agreement.

                                       OR

|_|      (c) these Warrants are being  transferred  pursuant to an effective
             registration  statement  under the U.S.  Securities Act of 1933, as
             amended.

If none of the  foregoing  boxes is  checked,  the  Warrant  Agent  shall not be
obligated  to register  the  Warrants  in the name of any Person  other than the
Holder  hereof  unless  and  until  the  conditions  to  any  such  transfer  of
registration set forth herein and in Article VIII of the Warrant Agreement shall
have been satisfied.

Dated:


                                      A-7
<PAGE>

                                           -------------------------
                                           (Signature of Owner)

                                           -------------------------
                                           (Street Address)

                                           -------------------------
                                           (City)   (State) (Zip Code)




                                           Signature Guaranteed By:

                                           ---------------------------

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

          The  undersigned  represents  and warrants that it is  purchasing  the
Warrant(s)  for its own account or an account with respect to which it exercises
sole  investment  discretion  and that it and any such  account is a  "qualified
institutional  buyer" within the meaning of Rule 144A under the U.S.  Securities
Act of  1933,  as  amended,  and is aware  that the sale to it is being  made in
reliance on Rule 144A and  acknowledges  that it has received  such  information
regarding KMC Telecom Holdings,  Inc. as the undersigned has requested  pursuant
to Rule 144A or has  determined not to request such  information  and that it is
aware  that  the  transferor  is  relying  upon  the   undersigned's   foregoing
representations  in order to claim the exemption from  registration  provided by
Rule 144A.

Dated:________________

                                        ----------------------------------------
[NOTE:  To be executed by an executive officer]



                                      A-8
<PAGE>




                                                                     EXHIBIT B-1



                            Form of Certificate to be
                   Delivered by Transferor in Connection with
                      Transfers to Persons Other Than QIBS
                      ------------------------------------

                                     [Date]

KMC Telecom Holdings, Inc.
1545 Route 206, Suite 300
Bedminster, NJ  07921

The Chase Manhattan Bank
450 West 33rd St., 15th Floor
New York, NY  10001-2697
Attention:  Capital Markets Fiduciary Services

Re:      Warrants (the "Warrants") to Purchase
         Common Shares of KMC Telecom Holdings, Inc. (the "Company")

Ladies and Gentlemen:

          We hereby  certify that such transfer is being  effected in compliance
with the transfer  restrictions  applicable to the Warrants or interests therein
transferred  pursuant  to  and  in  accordance  with  the  Securities  Act,  and
accordingly we hereby further certify that (check one):

          (a) |_| such transfer is being effected  pursuant to and in accordance
with Rule 144 under the Securities Act; or

          (b) |_| such transfer is being effected to the Company or a subsidiary
thereof;

                                       or

         (c) |_|  such  transfer  is being  effected  pursuant  to an  effective
registration statement under the Securities Act;

                                       or

         (d) |_| such transfer is being  effected  pursuant to an exemption from
the registration requirements of the Securities Act other than Rule 144 and Rule


                                     B-1-1
<PAGE>

144, and we hereby further certify that such transfer complies with the transfer
restrictions  applicable  to the Warrants or interests  therein  transferred  to
persons other than QIBs and in accordance with the requirements of the exemption
claimed,  which  certification is supported by an Opinion of Counsel provided by
us or the  transferee (a copy of which we have attached to this  certification),
to the effect that such transfer is in compliance  with the Securities Act. Upon
consummation  of the  proposed  transfer  in  accordance  with the  terms of the
Warrant Agreement, the transferred Warrants or interests therein will be subject
to the  restrictions  on transfer  enumerated  in the Private  Placement  Legend
printed  on the  Certificated  Warrant  and in the  Warrant  Agreement  and  the
Securities Act.

                                       Very truly yours,

                                       [Name of Transferor]


                                       By:--------------------------------------
                                          Authorized Signatory


                                     B-1-2
<PAGE>

                                                                     EXHIBIT B-2

                            Form of Certificate to be
                   Delivered By Transferees in Connection with
                      Transfers to Persons Other Than QIBS
                      ------------------------------------


                                                              [Date]


KMC Telecom Holdings, Inc.
1545 Route 206, Suite 300
Bedminster, NJ  07921


The Chase Manhattan Bank
450 West 33rd St., 15th Floor
New York, NY  10001-2697
Attention:  Capital Markets Fiduciary Services

Re:     Warrants (the "WARRANTS") to Purchase
        Common Shares of
        KMC Telecom Holdings, Inc. (the "COMPANY")


Ladies and Gentlemen:

          In  connection  with our proposed  purchase of  ----------- aggregate
number of Warrants, we confirm that:

          1. We understand  that any  subsequent  transfer of the Warrants,  any
     interest therein or the Common Shares issuable upon exercise of any Warrant
     (the "WARRANT  SHARES") is subject to certain  restrictions  and conditions
     set forth in the Warrant  Agreement dated as of April ___, 1999 relating to
     the Warrants (the "WARRANT  AGREEMENT") and the Warrant Registration Rights
     Agreement  dated April ___,  1999  relating to the Warrants  (the  "WARRANT
     REGISTRATION  RIGHTS AGREEMENT") and the undersigned agrees to be bound by,
     and not to resell,  pledge or  otherwise  transfer  the Warrants or Warrant
     Shares except in compliance with, such  restrictions and conditions and the
     U.S. Securities Act of 1933, as amended (the "SECURITIES ACT").

          2. We  understand  that  the  Warrants  represented  by  this  Warrant
     Certificate  and, as of the date this Warrant  Certificate  was  originally
     issued,  the Warrant Shares have not been  registered  under the Securities
     Act,  and  accordingly  may not be  offered,  sold,  pledged  or  otherwise


                                     B-2-1
<PAGE>

     transferred except as set forth in the following sentence. We agree that we
     will  not,  within  the  time  period  referred  to in Rule  144(k)  of the
     Securities Act (taking into account the provisions of Rule 144(d) under the
     Securities Act, if applicable) under the Securities Act as in effect on the
     date of the  transfer of this  Warrant,  resell or  otherwise  transfer the
     Warrants  represented by this Warrant Certificate except (a) to KMC Telecom
     Holdings,  Inc. or any subsidiary thereof, (b) to a qualified institutional
     buyer in compliance  with Rule 144A under the Securities  Act, (c) pursuant
     to  the  exemption  from  registration  provided  by  Rule  144  under  the
     Securities Act (if available),  (d) to an institutional accredited investor
     that, prior to such transfer,  furnishes to you, to the Company and, in the
     case of the Warrant Shares, to the transfer agent and registrar therefor, a
     signed letter containing certain representations and agreements relating to
     the  restrictions  on transfer of the Warrants  represented by this Warrant
     Certificate  (the form of which  letter can be  obtained  from the  Warrant
     Agent) and an opinion of counsel  acceptable to KMC Telecom Holdings,  Inc.
     and its counsel that such transfer is in compliance with the Securities Act
     or (f) pursuant to an effective registration statement under the Securities
     Act and, in each case, in accordance with applicable state securities laws.

          3. We  understand  that, on any proposed  resale of any Warrants,  any
     interest  therein or Warrant Shares,  we will be required to furnish to you
     and the Company such  certifications,  legal opinions and other information
     as you and the Company may reasonably  require to confirm that the proposed
     sale complies with the foregoing  restrictions.  We further understand that
     the Warrants purchased by us will bear a legend to the foregoing effect.

          4. We are an institutional  "accredited  investor" (as defined in Rule
     501(a)(1),  (2), (3) or (7) of Regulation D under the  Securities  Act) and
     have such knowledge and experience in financial and business  matters as to
     be capable of  evaluating  the  merits and risks of our  investment  in the
     Warrants,  and we and any accounts for which we are acting are each able to
     bear the economic risk of our or its investment for an indefinite period of
     time.

          5. We are acquiring  the Warrants  purchased by us for our own account
     or for one or more accounts (each of which is an institutional  "accredited
     investor") as to each of which we exercise sole investment discretion.


                                     B-2-2
<PAGE>

          You, the Company and, if applicable,  the transfer agent and registrar
for the Warrant Shares are entitled to rely upon this letter and are irrevocably
authorized  to produce this letter or a copy hereof to any  interested  party in
any  administrative or legal proceedings or official inquiry with respect to the
matters covered hereby.

                                           Very truly yours,

                                           [Name of Transferee]


                                           By:----------------------------------
                                              Authorized Signature


                                     B-2-3
<PAGE>

                                   APPENDIX A

LIST OF FINANCIAL EXPERTS
- -------------------------


Alex. Brown & Sons
Bear, Stearns & Co., Inc.
Dillon, Read & Co. Inc.
Donaldson, Lufkin & Jenrette Securities Corporation
Goldman, Sachs & Co.
Lazard Freres & Co.
Merrill Lynch, Pierce, Fenner & Smith Incorporated
Morgan Stanley & Co. Incorporated
PaineWebber Incorporated
Prudential Securities Inc.
Salomon Brothers Inc
Lehman Brothers



                      WARRANT REGISTRATION RIGHTS AGREEMENT

          Warrant  registration  rights  agreement,  dated as of April 30,  1999
(this "Agreement"),  between KMC TELECOM HOLDINGS,  INC., a Delaware corporation
(the "Company"),  and FIRST UNION INVESTORS,  INC., a North Carolina corporation
("First Union").

          WHEREAS,  pursuant to the terms of a Securities  Purchase Agreement of
even date herewith  (the  "PURCHASE  AGREEMENT"),  between the Company and First
Union,  the  Company  has  agreed to issue  and sell to First  Union a unit (the
"Series E Unit"),  consisting of 35,000 shares of the Company's Series E Senior,
Redeemable,  Exchangeable  PIK Preferred Stock (the "SERIES E PREFERRED  STOCK")
and 94,513 warrants (each, a "WARRANT" and collectively,  the "WARRANTS"),  each
Warrant  initially  entitling the holder thereof to purchase  0.471756 shares of
Common Stock (as defined  below) of the Company at an exercise price of $.01 per
Common Share (as defined below);

          WHEREAS,  the Company,  First Union and the Warrant  Agent (as defined
herein)  have  entered  into a  Warrant  Agreement  of even date  herewith  (the
"WARRANT AGREEMENT") providing for the issuance of the Warrants;

          WHEREAS,  the  Company  has issued  warrants  and rights  relating  to
warrants to certain  holders of its securities  under other warrant  agreements,
including the Warrant  Agreement dated February 4, 1999, as amended on April 30,
1999,  between the Company,  Newcourt  Commercial  Finance  Corporation,  Lucent
Technologies  Inc.,  First  Union and The Chase  Manhattan  Bank (the  "Existing
Warrant Agreement");

          WHEREAS,  the  Company  has  granted  certain  registration  rights to
Newcourt  Commercial  Finance  Corporation and Lucent  Technologies Inc. under a
Warrant  Registration  Rights Agreement dated as of February 4, 1999, as amended
as of the date hereof; and

          WHEREAS, as described in Section 2.4 of the Existing Warrant Agreement
(as defined  below),  the holders of Series E Preferred  Stock have the right to
receive 227,273 Warrants (the "Springing  Warrants")  unless certain  conditions
are met.

          In  consideration  of  the  foregoing  and of  the  mutual  agreements
contained  herein and in the Purchase  Agreement,  the Company and the Purchaser
hereby agree as follows:

          1. DEFINITIONS.

          As used in this  Agreement,  the following  capitalized  defined terms
shall have the following meanings:

          "Auditors" means, at any time, the independent auditors of the Company
at such time.

          "Board" means the board of directors of the Company from time to time.


<PAGE>

          "Closing Date" means April 30, 1999.

          "Comfort Letter" has the meaning specified in Section 3 hereof.

          "Commission"   means  the  United  States   Securities   and  Exchange
Commission.

          "Common Shares" means the shares of the Common Stock of the Company.

          "Common  Stock" means the common stock,  par value $.01 per share,  of
the Company.

          "Company" has the meaning specified in the recitals to this Agreement.

          "Company IPO Shares" has the meaning specified in Section 2 hereof.

          "Cutback Notice" has the meaning specified in Section 2 hereof.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended.

          "Existing  Holders"  means  the  Existing  Priority  Holders  and  the
Existing Preferred Holders.

          "Existing  Preferred Holders" means the record holders of the Existing
Preferred  Warrants  and the  holders  of Common  Shares  (or other  securities)
received upon exercise thereof.

          "Existing  Preferred  Warrants" means the 52,272 existing warrants and
the right to acquire certain  Springing  Warrants unless certain  conditions are
satisfied,  all of which were issued pursuant to the Existing Warrant Agreement,
each such warrant  initially  entitling the holder thereof to purchase  0.471756
shares of Common  Stock of the Company at an  exercise  price of $.01 per Common
Share.

          "Existing  Preferred  Warrant Shares" means the Common Shares issuable
upon exercise of an Existing Holder's Existing  Preferred  Warrants,  such other
securities  as shall be issuable  upon the  exercise of the  Existing  Preferred
Warrants,  or the  Common  Shares or such  other  securities  received  upon the
exercise thereof,  pursuant to the Existing Warrant  Agreement,  in each case to
the extent that such Common Shares or other  securities would be (upon issuance)
or are, as the case may be, subject to restrictions on transfer.

          "Existing  Priority  Holders" means the record holders of the Existing
Priority  Warrants  and the  holders  of Common  Shares  (or  other  securities)
received upon exercise thereof.

          "Existing  Priority  Warrants"  means the 460,800  warrants  that were
issued  pursuant to a Warrant  Agreement  dated  January  29,  1998  between the
Company and The Chase Manhattan Bank, each such warrant initially  entitling the
holder  thereof to purchase  0.21785 shares of Common Stock of the Company at an
exercise price of $.01 per Common Share.


                                       2

<PAGE>


          "Existing  Priority  Warrant  Shares" means the Common Shares issuable
upon exercise of an Existing  Holder's Existing  Priority  Warrants,  such other
securities  as shall be  issuable  upon the  exercise of the  Existing  Priority
Warrants,  or the  Common  Shares or such  other  securities  received  upon the
exercise  thereof,  pursuant to the Warrant Agreement dated January 29, 1998, in
each case to the extent that such  Common  Shares or other  securities  would be
(upon issuance) or are, as the case may be, subject to restrictions on transfer.

          "Existing Warrant Agreement" has the meaning specified in the recitals
to this Agreement.

          "Existing  Warrants"  means the  Existing  Priority  Warrants  and the
Existing Preferred Warrants.

          "Existing  Warrant Shares" means the Existing  Priority Warrant Shares
and the Existing Preferred Warrant Shares.

          "Expiration  Date" means the second  anniversary  of the Closing Date,
except  that in the event the  Springing  Warrants  are  issued as  provided  in
Section 2.4 of the Existing Warrant Agreement, the Expiration Date, with respect
to the Springing Warrants only, shall be the second anniversary from the date of
issuance of the Springing Warrants.

          "Holders"  means the record holders of the Warrants and the holders of
Common Shares (or other securities) received upon exercise thereof.

          "Includible  Secondary  Shares" has the meaning specified in Section 2
hereof.

          "managing underwriter" has the meaning specified in Section 2 hereof.

          "Opinion" has the meaning specified in Section 3 hereof.

          "Other IPO Shares" has the meaning specified in Section 2 hereof.

          "Piggy-back  Registration Rights" has the meaning specified in Section
2 hereof.

          "Purchase Agreement" has the meaning specified in the recitals to this
Agreement.

          "Registration  Statement"  has the  meaning  specified  in  Section  2
hereof.

          "Resale Shelf" has the meaning specified in Section 3 hereof.

          "Securities  Act" means the United States  Securities  Act of 1933, as
amended.

          "Series E Preferred  Stock" has the meaning  specified in the recitals
to this Agreement.

          "Series E Unit" has the  meaning  specified  in the  recitals  to this
Agreement.


                                       3
<PAGE>


          "Springing Warrants" has the meaning specified in the recitals to this
Agreement.

          "Stockholders  Agreement" means the Amended and Restated  Stockholders
Agreement,  dated as of October 31,  1997,  among the  Company,  Nassau  Capital
Partners L.P., NAS Partners I L.L.C.,  Harold N. Kamine, KMC  Telecommunications
L.P., AT&T Credit Corporation, General Electric Capital Corporation, First Union
National Bank, as successor to CoreStates Bank,  N.A., and CoreStates  Holdings,
Inc., as amended and supplemented from time to time.

          "Underlying Securities" means the Common Shares issuable upon exercise
of the Warrants or such other  securities as shall be issuable upon the exercise
of the Warrants, pursuant to the Warrant Agreement.

          "Warrant  Agent" means The Chase  Manhattan  Bank,  in its capacity as
Warrant Agent under the Warrant Agreement.

          "Warrant  Agreement" has the meaning specified in the recitals to this
Agreement.

          "Warrant Registration  Statement" has the meaning specified in Section
3 hereof.

          "Warrants"  has  the  meaning   specified  in  the  recitals  to  this
Agreement.

          "Warrant Shares" means the Common Shares issuable upon exercise of the
Warrants  or  Springing  Warrants  held of record  by the  Holders,  such  other
securities as shall be issuable upon the exercise of such Warrants and Springing
Warrants,  or the  Common  Shares or such  other  securities  received  upon the
exercise thereof,  pursuant to the Warrant Agreement, in each case to the extent
that such Common Shares or other  securities would be (upon issuance) or are, as
the case may be, subject to restrictions on transfer.

          2. PIGGY-BACK REGISTRATION RIGHTS.

          (a) If, prior to the Expiration  Date, the Company  proposes to file a
Registration  Statement with the Commission respecting an offering of any shares
of Common Stock (or other  securities  issuable  upon  exercise of the Warrants)
(other  than  (i)  an  offering  registered  solely  on  Form  S-4 or S-8 or any
successor form thereto,  or (ii) the initial public offering of shares of Common
Stock (or  other  securities  issuable  upon  exercise  of the  Warrants)  if no
shareholder of the Company participates  therein), the Company shall give prompt
written notice to the Holders of Warrants, Springing Warrants or Warrant Shares,
at least 30 days  prior to the  initial  filing  of the  registration  statement
relating to such offering  (the  "REGISTRATION  STATEMENT").  Each  Holder shall
have the right,  within 20 days after  delivery  of such  notice,  to request in
writing  that the  Company  include  all or a portion of such  Holder's  Warrant
Shares in such Registration  Statement  ("PIGGY-BACK  REGISTRATION RIGHTS"). The
Company  shall include in the public  offering all of the Warrant  Shares that a
Holder has requested be included, unless the underwriter for the public offering
or the  underwriter  managing the public offering (in either case, the "MANAGING
UNDERWRITER") delivers a notice (a "CUTBACK NOTICE") pursuant to Section 2(b) or



                                       4
<PAGE>

2(c) hereof. The managing underwriter may deliver one or more Cutback Notices at
any time prior to the  execution of the  underwriting  agreement  for the public
offering.

          (b) If a proposed  public  offering  includes  both  securities  to be
offered for the account of the Company  ("COMPANY  IPO SHARES") and shares to be
sold by stockholders, the provisions of this Section 2(b) shall be applicable if
the managing underwriter delivers a Cutback Notice stating that, in its opinion,
the number of Common Shares (other than (a) Existing  Warrant  Shares to be sold
by any Existing  Holders and (b) Warrant  Shares to be sold by any Holders) that
selling  stockholders  propose  to sell  therein,  whether  or not such  selling
stockholders  have the right to include shares therein (the "OTHER IPO SHARES"),
plus the number of  Existing  Warrant  Shares  that the  Existing  Holders  have
requested to be sold therein, plus the number of Warrant Shares that the Holders
have  requested  to be sold  therein,  plus the Company IPO Shares,  exceeds the
maximum number of shares  specified by the managing  underwriter in such Cutback
Notice that may be distributed  without adversely affecting the price, timing or
distribution  of the Company IPO Shares.  Such maximum number of shares that may
be so sold, excluding the Company IPO Shares, are referred to as the "INCLUDIBLE
SHARES."

          If the managing  underwriter  delivers  such Cutback  Notice,  (i) the
Company shall be entitled to include all of the Company IPO Shares in the public
offering,  (ii) each  stockholder  who has  requested the inclusion of Other IPO
Shares in the public offering pursuant to Section 6.1 or 6.2 of the Stockholders
Agreement  shall be  entitled  to  include  all of its Other IPO Shares and each
Existing  Priority  Holder  who has  requested  the  inclusion  of its  Existing
Priority  Warrant  Shares  shall be  entitled  to  include  all of its  Existing
Priority  Warrant  Shares,  in each case,  in priority to the  inclusion  of any
Existing  Preferred  Warrant  Shares  and any  Warrant  Shares  requested  to be
included by  Existing  Preferred  Holders  and the  Holders and (iii)  except as
otherwise provided in the preceding clause (ii), each requesting Holder shall be
entitled  to include in the public  offering  up to its pro rata  portion of the
Includible Shares on a PARI PASSU basis with the requesting  Existing  Preferred
Holders and in priority to the  inclusion  (except as otherwise  provided in the
preceding  clause  (ii)) of any Other IPO Shares that are proposed to be sold in
such public offering.

          (c) If a proposed  public  offering is entirely a secondary  offering,
the  provisions  of this  Section  2(c)  shall  be  applicable  if the  managing
underwriter  delivers  a  Cutback  Notice  stating  that,  in its  opinion,  the
aggregate number of Existing Warrant Shares, Warrant Shares and Other IPO Shares
proposed  to  be  sold  therein  exceeds  the  maximum  number  of  shares  (the
"INCLUDIBLE  SECONDARY  SHARES")  specified by the managing  underwriter in such
Cutback Notice that may be distributed  without  adversely  affecting the price,
timing or distribution of the Common Shares being  distributed.  If the managing
underwriter delivers such Cutback Notice, (i) each stockholder who has requested
the inclusion of Other IPO Shares in the public offering pursuant to Section 6.1
or 6.2 of the  Stockholders  Agreement  shall be  entitled to include all of its
Other IPO  Shares  and each  Existing  Priority  Holder  who has  requested  the
inclusion of its Existing  Priority  Warrant Shares shall be entitled to include
all of its Existing  Priority  Warrant Shares,  in each case, in priority to the
inclusion  of any  Existing  Preferred  Warrant  Shares and any  Warrant  Shares
requested to be included by the Holders and (ii) except as otherwise provided in
the preceding clause (i), each requesting Holder shall be entitled to include in


                                       5
<PAGE>

the  public  offering  up to its pro rata  portion of the  Includible  Secondary
Shares on a PARI PASSU basis with the requesting  Existing Preferred Holders and
in priority to the inclusion  (except as set forth in the preceding  clause (i))
of any Other IPO Shares that are proposed to be sold in such public offering.

          (d) The underwriting  agreement for such public offering shall provide
that each  requesting  Holder  shall have the right to sell its  Warrant  Shares
(other than Warrant  Shares  excluded  from such public  offering  pursuant to a
Cutback  Notice and the terms of Section 2(b) or 2(c)) to the  underwriters  and
that the underwriters shall purchase the Warrant Shares at the price paid by the
underwriters  for the Common  Shares sold by the Company  and/or  other  selling
stockholders, as the case may be.

          3. SHELF REGISTRATION.

          (a) If only the  Company  sells  Common  Shares in an  initial  public
offering or all of the Warrant  Shares have not been sold in a public  offering,
the Company shall use its reasonable  best efforts to cause to be filed pursuant
to Rule 415 under  the  Securities  Act a shelf  registration  statement  on the
appropriate form (the "WARRANT REGISTRATION STATEMENT") covering the issuance of
the Warrant  Shares upon  exercise of the Warrants and shall use its  reasonable
best efforts to cause the Warrant  Registration  Statement  to become  effective
under the  Securities  Act within 180 days after the closing date of the initial
public  offering;  PROVIDED,  HOWEVER,  that  (1) in no  event  may the  Warrant
Registration  Statement be declared  effective prior to the first anniversary of
the  Closing  Date and (2) if the  Commission  shall  request  that the  Company
register the resale of the Warrant Shares instead of the issuance  thereof,  the
Warrant  Registration  Statement  shall  register such resale as opposed to such
issuance.  The Company  shall use  reasonable  best  efforts to keep the Warrant
Registration Statement continuously effective until the earlier of (i) such time
as all Warrants have been  exercised  or, in the case of clause (2),  until such
time as all Warrant Shares have been resold or (ii) the Expiration  Date.  Prior
to filing the Warrant  Registration  Statement  or any  amendment  thereto,  the
Company shall provide a copy thereof to the Purchaser and its counsel and afford
them a reasonable time to comment thereon.

          If the Company is unable to file or cause to be filed, or is unable to
maintain the effectiveness of a Warrant Registration Statement,  notwithstanding
its  reasonable  best  efforts to do so, the Company  shall cause such filing to
take place, or shall cause such Warrant  Registration  Statement to again become
effective,  after  removal  of  the  impediment  to  file  or  to  maintain  the
effectiveness of such Warrant Registration Statement.

          (b) If the Warrant Registration Statement shall register the resale of
the Warrant Shares (a "RESALE SHELF") as provided in Section 3(a)(2) above,  the
Company agrees to:

          (i) make available for inspection by  representatives  of the Holders,
     any underwriter  participating  in any disposition  pursuant to such Resale
     Shelf  and  attorneys  and  accountants   designated  by  the  Holders,  at
     reasonable times and in a reasonable  manner,  financial and other records,
     documents  and  properties of the Company that are pertinent to the conduct
     of due diligence  customary  for an  underwritten  offering,  and cause the
     officers,  directors and employees of the Company to supply all information


                                       6
<PAGE>

     reasonably requested by any such representative,  underwriter,  attorney or
     accountant in connection with a Resale Shelf; PROVIDED,  HOWEVER, that such
     persons  shall  first  agree  in  writing  with  the  Company  to use  such
     information  only  in  connection  with  the  transaction  for  which  such
     information was obtained and that any information that is reasonably and in
     good faith designated by the Company in writing as confidential at the time
     of delivery of such information shall be kept confidential by such persons,
     unless and to the extent that disclosure of such information is required by
     law or such  information  becomes  generally  available to the public other
     than as a result of a disclosure or failure to safeguard  such  information
     by such person;

          (ii) use its reasonable  best efforts to cause all Warrant Shares sold
     under a  Resale  Shelf  to be  listed  on any  securities  exchange  or any
     automated  quotation system on which securities of the same class issued by
     the Company are then listed if requested  by the Holders of Warrant  Shares
     representing a majority of the Warrants  originally  issued,  to the extent
     such Warrant Shares satisfy applicable listing requirements;

          (iii) provide as soon as practicable, a reasonable number of copies of
     the Warrant  Registration  Statement,  any  pre-effective or post-effective
     amendment   thereto,   and  the  prospectus   (including  each  preliminary
     prospectus  and any  amendment  or  supplements  thereto)  included in such
     Resale Shelf to Holders that are selling  Warrant  Shares  pursuant to such
     Resale Shelf;

          (iv)  cause to be  provided  to the  Warrant  Agent,  on behalf of the
     Holders and beneficial owners of Warrant Shares,  upon the effectiveness of
     such Resale Shelf, a customary  "10b-5" opinion of independent  counsel (an
     "OPINION") and a customary "cold comfort" letter of independent auditors (a
     "COMFORT LETTER");

          (v) cause to be  provided  to the  Holders  and  beneficial  owners of
     Warrant Shares an Opinion and Comfort Letter with respect to each Form 10-K
     and Form 10-Q,  including any amendments  thereto,  that is incorporated by
     reference in such Resale Shelf; and

          (vi) notify the Warrant Agent,  for  distribution to the Holders,  (A)
     when the Resale  Shelf has  become  effective  and when any  post-effective
     amendment thereto has been filed and becomes effective,  (B) of any request
     by the  Commission or any state  securities  authority for  amendments  and
     supplements  to  the  Resale  Shelf  or of  any  material  request  by  the
     Commission or any state  securities  authority for  additional  information
     after the Resale  Shelf has become  effective,  (C) of the  issuance by the
     Commission or any state  securities  authority of any stop order suspending
     the  effectiveness of the Resale Shelf or the initiation of any proceedings
     for that purpose,  (D) if,  between the effective  date of the Resale Shelf
     and the  closing  of any  sale  of  Warrant  Shares  covered  thereby,  the
     representations and warranties of the Company contained in any underwriting
     agreement, securities sales agreement or other similar agreement, including
     this Agreement,  relating to disclosure cease to be true and correct in any
     material respect or if the Company  receives any notification  with respect


                                       7
<PAGE>

     to the  suspension of the  qualification  of the Warrant Shares for sale in
     any jurisdiction or the initiation of any proceeding for such purpose,  (E)
     of the  happening  of any event  during  the  period  the  Resale  Shelf is
     effective such that such Resale Shelf or the related prospectus contains an
     untrue  statement  of a  material  fact or omits to state a  material  fact
     required to be stated therein or necessary to make  statements  therein not
     misleading   and  (F)  of  any   determination   by  the  Company   that  a
     post-effective  amendment to a Registration Statement would be appropriate.
     The Holders hereby agree to suspend the use of the prospectus  contained in
     any Resale  Shelf upon  receipt of such notice under clause (C), (E) or (F)
     above  until,  in the case of clause  (C),  such stop  order is  removed or
     rescinded  or, in the case of clauses (E) and (F),  the Company has amended
     or supplemented such prospectus to correct such misstatement or omission.

          4. SUSPENSION.

          Notwithstanding   the   foregoing,   in  addition  to  any  suspension
contemplated  by  clauses  (C),  (E) or  (F) of  Section  3(b)(vi),  during  any
consecutive  365-day  period,  the Company  shall have the  privilege to suspend
availability of the Warrant  Registration  Statement and the related  prospectus
for (i) up to two 30-consecutive-day periods, except for the 30 days immediately
prior to the Expiration  Date, if the Board  determines in good faith that there
is a valid purpose for such suspension and (ii) five additional, non-consecutive
three-day  periods,  except for the 30 days immediately  prior to the Expiration
Date,  if the Board  determines  in good faith that the Company  cannot  provide
adequate disclosure during such period due to circumstances  beyond its control.
Notice of such suspension shall be given promptly to the Warrant Agent.

          5. BLUE SKY.

          The  Company  shall use its  reasonable  best  efforts to  register or
qualify the Underlying  Securities proposed to be sold or issued pursuant to the
Registration   Statement  or  the  Warrant  Registration   Statement  under  all
applicable  securities  or "blue  sky" laws of all  jurisdictions  in the United
States  in which  any  Holder  of  Warrants  may or may be  deemed  to  purchase
Underlying  Securities  upon the  exercise  of Warrants or resale of the Warrant
Shares,  as the case may be,  and  shall  use its  reasonable  best  efforts  to
maintain such  registration or  qualification  through the earlier of (A) in the
case of a Registration Statement,  the date upon which all of the Warrant Shares
have been sold or such other sale as shall be required by  applicable  law,  (B)
the date upon which all Warrants have been  exercised or all Warrant Shares have
been resold, as the case may be, under the Warrant Shelf Registration  Statement
and (C) the Expiration Date;  PROVIDED,  HOWEVER,  that the Company shall not be
required to (i) qualify as a foreign  corporation  or as a broker or a dealer in
securities  in any  jurisdiction  where it would not  otherwise  be  required to
qualify  but for this  Section  5, (ii) file any  general  consent to service of
process or (iii)  subject  itself to taxation in any  jurisdiction  if it is not
otherwise so subject.

          6. ACCURACY OF DISCLOSURE.

          The  Company  (and its  successors)  represents  and  warrants to each
Holder (and each beneficial  owner of a Warrant or Warrant Share) and agrees for


                                       8
<PAGE>

the benefit of each Holder  (and each  beneficial  owner of a Warrant or Warrant
Share) that,  except during any period in which the  availability of the Warrant
Registration  Statement  has  been  suspended,   (i)  the  Warrant  Registration
Statement and the documents  incorporated by reference  therein will not contain
any  untrue  statement  of a  material  fact or omit to  state a  material  fact
necessary to make the statements therein not misleading; and (ii) the prospectus
delivered to such Holder upon its exercise of Warrants or pursuant to which such
Holder  sells  its  Warrant  Shares,  as the  case  may be,  and  the  documents
incorporated  by reference  therein  will not contain any untrue  statement of a
material fact or omit to state a material fact  necessary to make the statements
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading;  PROVIDED, HOWEVER, that representations,  warranties and agreements
set forth in this  Section  6 do not apply to  statements  or  omissions  in the
Warrant  Registration  Statement or any such prospectus  based upon  information
relating to any Holder  furnished to the Company (or its  successors) in writing
by such Holder expressly for use therein.

          7. INDEMNITY.

          The Company  hereby  agrees to indemnify  each  beneficial  owner of a
Warrant and each person,  if any, who controls any beneficial owner of a Warrant
within the meaning of either  Section 15 of the  Securities Act or Section 20 of
the Exchange Act, or is under common  control  with,  or is  controlled  by, any
beneficial  owner of a Warrant  (whether or not it is, at the time the indemnity
provided for in this Section 7 is sought,  such a  beneficial  owner),  from and
against all losses,  damages or liabilities  which such beneficial  owner or any
such controlling or affiliated  person suffers as a result of any breach, on the
date of any exercise of a Warrant by such beneficial  owner or the resale of any
Warrant  Share  by  such  Holder,   in  either  case  pursuant  to  the  Warrant
Registration  Statement,  of  the  representations,   warranties  or  agreements
contained in Section 6 hereof.  Each  beneficial  owner of a Warrant  Share sold
pursuant to a Resale Shelf, by accepting its beneficial  ownership of a Warrant,
hereby (i) agrees to provide the Company  with  information  with  respect to it
that the Company  reasonably  requests in  connection  with any Resale Shelf and
(ii) agrees,  severally and not jointly, to indemnify the Company, its directors
and  officers and each  person,  if any,  who  controls  the Company  within the
meaning of either Section 15 of the Securities Act or Section 20 of the Exchange
Act against any liability  incurred by it or such controlling person as a result
of any  misstatement  of information  provided by such  beneficial  owner to the
Company in writing  expressly  for inclusion in the Resale Shelf or any omission
of a material fact from any such  information  provided by such beneficial owner
to the Company.

          8. EXPENSES.

          All expenses  incident to the Company's  performance  of or compliance
with  its  obligations  under  this  Agreement  will be  borne  by the  Company,
regardless of whether a Registration Statement or Warrant Registration Statement
becomes  effective,  including without limitation (i) all Commission or National
Association of Securities Dealers,  Inc.  registration and filing fees, (ii) all
reasonable  fees and expenses  incurred in connection with compliance with state
securities  or "blue sky" laws,  (iii) all  reasonable  expenses  of any persons
incurred by or on behalf of the Company in preparing or assisting in  preparing,
word  processing,  printing and distributing  any  registration  statement,  any


                                       9
<PAGE>

prospectus,  any amendments or supplements  thereto and other documents relating
to the performance of and compliance  with this  Agreement,  (iv) the reasonable
fees (including  reasonable  legal fees and expenses) and  disbursements  of the
Warrant Agent,  (v) the  reasonable  fees and  disbursements  of counsel for the
Company  and (vi)  the fees and  disbursements,  if any,  of the  Auditors;  but
excluding  any and all fees,  expenses  and  disbursements  of the Holders  (not
specifically  included  above),  including,  without  limitation,  (x)  fees and
disbursements  of counsel  retained  by the  participating  Holders  and (y) the
Holder's share of underwriting discounts and commissions.

          9. COVENANTS OF THE COMPANY.

          The Company hereby agrees and covenants as follows:

          (a) After any initial public  offering of its equity  securities,  the
Company  shall  file as and when  applicable,  on a timely  basis,  all  reports
required  to be  filed by it under  the  Exchange  Act,  and take  such  further
reasonable  action as may be required from time to time and as may be within the
reasonable control of the Company, to enable the Holders to transfer the Warrant
Shares  without  registration  under the Securities Act within the limitation of
the exemptions provided by Rule 144 under the Securities Act or any similar rule
or regulation hereafter adopted by the Commission.

          (b) The Company shall not, directly or indirectly,  (i) enter into any
merger,  consolidation or  reorganization  in which the Company shall not be the
surviving corporation or (ii) transfer or agree to transfer all or substantially
all  the  Company's  assets,   unless  prior  to  such  merger,   consolidation,
reorganization or asset transfer,  the surviving  corporation or the transferee,
respectively,  shall have  agreed in writing  to assume the  obligations  of the
Company  under this  Agreement,  and for that  purpose  references  hereunder to
"Warrant  Shares" shall be deemed to include the securities which the Holders of
Warrant  Shares  would be  entitled to receive in  exchange  for Warrant  Shares
pursuant to any such merger, consolidation or reorganization.

          (c) The Company  shall not grant to any Person (other than a Holder of
Warrant  Shares) any  registration  rights  with  respect to  securities  of the
Company,  or enter  into any  agreement,  that  would be  inconsistent  with the
registration rights granted to Holders of Warrants herein.

          10. MISCELLANEOUS.

          (a) NO  INCONSISTENT  AGREEMENTS.  Each of the Company and First Union
represent to the other that it has not entered into, and agrees that on or after
the date of this  Agreement  it will not  enter  into,  any  agreement  which is
materially  inconsistent  with the rights  granted to the Holders of Warrants or
Warrant  Shares in this  Agreement or otherwise  materially  conflicts  with the
provisions hereof. The Company represents that the rights granted to the Holders
hereunder  do not in any  material  way  conflict  with  and are not  materially
inconsistent  with the rights  granted to the  holders  of the  Company's  other
issued and outstanding securities under any agreements.



                                       10
<PAGE>

          (b)  AMENDMENTS  AND  WAIVERS.   The  provisions  of  this  Agreement,
including  the  provisions  of this  sentence,  may not be amended,  modified or
supplemented,  and waivers or consents to departures from the provisions  hereof
may not be given  unless the  Company and the Warrant  Agent have  obtained  the
written  consent of Holders of at least a majority of the  outstanding  Warrants
affected  by  such  amendment,  modification,  supplement,  waiver  or  consent;
PROVIDED that (i) any  amendment,  modification  or supplement to this Agreement
which,  in the good faith opinion of the Board (and evidenced by a resolution of
such board), does not adversely affect any Holder,  shall not be subject to such
requirement for written  consent;  and (ii) any amendment shall not be effective
unless the Warrant Agent shall have  received an opinion of counsel,  reasonably
satisfactory to it, that such amendment complies with the requirements hereof.

          (c)  NOTICES.  All notices and other  communications  provided  for or
permitted  hereunder  shall  be made in  writing  by  hand-delivery,  registered
first-class  mail,  telex,  telecopier,  or any courier  guaranteeing  overnight
delivery (i) if to a Holder, at the most current address given by such Holder to
the Company by means of a notice given in accordance with the provisions of this
Section 10(c);  (ii) if to the Company,  initially at the Company's  address set
forth in the Purchase Agreement and thereafter at such other address,  notice of
which is given in  accordance  with the  provisions of this Section  10(c);  and
(iii) if to the Purchaser, initially at the Purchaser's address set forth in the
Purchase  Agreement  and  thereafter at such other  address,  notice of which is
given in accordance with the provisions of this Section 10(c).

          All such notices and communications  shall be deemed to have been duly
given:  at the time  delivered by hand, if personally  delivered;  five business
days after  being  deposited  in the mail,  postage  prepaid,  if  mailed;  when
answered back, if telexed; when receipt is acknowledged,  if telecopied;  and on
the  next  business  day if  timely  delivered  to an air  courier  guaranteeing
overnight delivery.

          (d) SUCCESSORS AND ASSIGNS.  This Agreement shall inure to the benefit
of and be binding upon the  successors,  assigns and  transferees of each of the
parties,  including without limitation subsequent Holders; provided that nothing
herein shall be deemed to permit any assignment,  transfer or other  disposition
of Warrants in violation  of the terms of the Purchase  Agreement or the Warrant
Agreement.  If any  transferee  of any Holder  shall  acquire  Warrants,  in any
manner,  whether by operation of law or otherwise,  such Warrants  shall be held
subject to all of the terms of this Agreement and the Warrant Agreement,  and by
taking and holding such  Warrants  such person shall be  conclusively  deemed to
have  agreed to be bound by and to perform  all of the terms and  provisions  of
this  Agreement  and the Warrant  Agreement and such person shall be entitled to
receive the benefits hereof.

          (e) PURCHASES AND SALES OF WARRANTS.  The Company shall not, and shall
use its reasonable  best efforts to cause its affiliates (as defined in Rule 405
under the Securities Act) not to, purchase and then resell or otherwise transfer
any Warrants other than Warrants acquired and cancelled.



                                       11
<PAGE>

          (f)  THIRD  PARTY  BENEFICIARY.  The  Holders  shall  be  third  party
beneficiaries  to the agreements  made  hereunder  between the Company and First
Union, and each Holder shall have the right to enforce such agreements  directly
to the extent it deems such  enforcement  necessary  or advisable to protect its
rights or the rights of Holders hereunder.

          (g)  COUNTERPARTS.  This  Agreement  may be  executed in any number of
counterparts and by the parties hereto in separate  counterparts,  each of which
when so  executed  shall be  deemed  to be an  original  and all of which  taken
together shall constitute one and the same agreement.

          (h) HEADINGS.  The headings in this  Agreement are for  convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

          (i) GOVERNING LAW. This Agreement shall be governed by the laws of the
State of New York.

          (j) SEVERABILITY.  In the event that any one or more of the provisions
contained  herein,  or the  application  thereof  in any  circumstance,  is held
invalid, illegal or unenforceable,  the validity, legality and enforceability of
any such  provision  in every  other  respect  and of the  remaining  provisions
contained herein shall not be affected or impaired thereby.

          (k)  WAIVER  OF  IMMUNITY.  To the  extent  that  the  Company  has or
hereafter  may acquire any immunity from  jurisdiction  of any court or from any
legal process (whether through service of notice, attachment prior to judgement,
attachment in aid of execution,  execution or otherwise)  with respect to itself
or its property,  it hereby  irrevocably  waives such immunity in respect of its
obligations under this Agreement to the fullest extent permitted by law.

          (l) INITIAL PUBLIC OFFERING.  Notwithstanding anything to the contrary
herein  contained,  if the Company conducts an initial public offering of equity
securities (other than nonconvertible  preferred shares),  the Company will give
the Holders the  opportunity to convert their Warrants into warrants to purchase
such equity  securities (other than  nonconvertible  preferred shares) and their
Warrant Shares into such equity securities (other than nonconvertible  preferred
shares). Such conversion  opportunity will be on terms and conditions determined
to be fair and reasonable by the Company's Board.


                                       12
<PAGE>


          IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first written above.



                                                KMC TELECOM HOLDINGS, INC.


                                             By /s/ Michael A. Sternberg
                                                --------------------------------
                                                Name:  Michael A. Sternberg
                                                Title:  President


                                             FIRST UNION INVESTORS, INC.


                                             By /s/ Pearce Landry
                                                --------------------------------
                                                Name:  Pearce Landry
                                                Title:  Vice President

















                                       13
<PAGE>






________________________________________________________________________________




                      WARRANT REGISTRATION RIGHTS AGREEMENT


                                     between


                           KMC TELECOM HOLDINGS, INC.


                                       and


                           FIRST UNION INVESTORS, INC.



                           Dated as of April 30, 1999



________________________________________________________________________________








                                       14


                               AMENDMENT NO. 1 TO
                    THE WARRANT REGISTRATION RIGHTS AGREEMENT

          AMENDMENT NO. 1 dated as of April 30, 1999 to the Warrant Registration
Rights  Agreement,  dated as of  February  4,  1999  (the  "Registration  Rights
Agreement")  among  KMC  Telecom  Holdings,   Inc.  (the  "Company"),   Newcourt
Commercial  Finance  Corporation  ("Newcourt"),  and Lucent  Technologies,  Inc.
("Lucent").
                               W I T N E S S E T H

          WHEREAS,   Newcourt   and  Lucent  have   certain   rights  under  the
Registration  Rights Agreement to have the Company register  securities owned by
them;

          WHEREAS, the Company has issued to First Union Investors, Inc. ("First
Union")  Preferred  Stock  Warrants 2 (as defined  below) and has entered into a
warrant  registration  rights  agreement with First Union,  dated as of the date
hereof (the "Registration Rights Agreement 2") giving First Union certain rights
to have the Company register securities owned by First Union;

          WHEREAS,  the parties hereto desire to make certain  amendments to the
Registration  Rights  Agreement to reconcile the rights  granted to Newcourt and
Lucent under the  Registration  Rights Agreement and the rights granted to First
Union under the Registration Rights Agreement 2;

          NOW,  THEREFORE,  in  consideration of the premises and for other good
and  valuable  consideration,  the receipt and  sufficiency  of which are hereby
acknowledged, the parties hereto hereby agree as follows:

          1. DEFINED TERMS.  Unless  otherwise  defined herein,  all capitalized
terms defined in the  Registration  Rights Agreement and used herein are so used
as so defined.  In  addition,  the  following  terms shall have the meanings set
forth below:

          "PREFERRED  STOCK  WARRANTS  2" means  Warrants  issued to  holders of
Series E Preferred Stock pursuant to the Warrant  Agreement 2, each such Warrant
initially  entitling the holder  thereof to purchase  0.471756  shares of Common
Stock at an exercise price of $.01 per share, and any Springing  Warrants issued
to First Union  under the Warrant  Agreement  as amended by  Amendment  No. 1 to
Warrant Agreement dated as of April 30, 1999.

          "PURCHASE  AGREEMENT 2" means the Securities  Purchase Agreement dated
as of April 30, 1999 between the Company and First Union Investors, Inc.

          "REGISTRATION  RIGHTS  AGREEMENT"  has the  meaning  specified  in the
introductory paragraph of this Amendment;  "REGISTRATION RIGHTS AGREEMENT 2" has
the meaning specified in the recitals to this Amendment.


<PAGE>

          "WARRANT  AGREEMENT 2" means the Warrant  Agreement  dated as of April
30, 1999 among the Company, First Union Investors,  Inc. and The Chase Manhattan
Bank as Warrant Agent.

          2.  AMENDMENT  TO  SECTIONS  2(B) AND (C) OF THE  REGISTRATION  RIGHTS
AGREEMENT.

          (a) For purposes of the second paragraph of Paragraph (b) of Section 2
of the Registration  Rights Agreement,  "Holders" shall be deemed to include, in
addition to the record  holders of the warrants and  Springing  Warrants  issued
pursuant  to the  Warrant  Agreement  and  holders  of Common  Shares  (or other
securities)  received upon exercise thereof,  the record holders of the warrants
issued under the Warrant  Agreement 2 and the holders of Common Shares (or other
securities) received upon exercise thereof;

          (b) For  purposes of  Paragraph  (c) of Section 2 of the  Registration
Rights  Agreement,  "Holders"  shall be deemed to  include,  in  addition to the
record  holders of the warrants and Springing  Warrants  issued  pursuant to the
Warrant  Agreement and holders of Common Shares (or other  securities)  received
upon  exercise  thereof,  the record  holders of the  warrants  issued under the
Warrant  Agreement  2 and the  holders of Common  Shares  (or other  securities)
received upon exercise thereof.

          3. Except as expressly  amended  hereby,  all of the provisions of the
Registration  Rights  Agreement are hereby  affirmed and shall  continue in full
force and effect in accordance with their terms.

          4. This Amendment  shall be governed and construed in accordance  with
the laws of the  state  of  Delaware  applicable  to  agreements  made and to be
performed  entirely  within  such state,  without  regard to the  principles  of
conflicts of laws thereof.

          5. This Amendment may be executed in one or more counterparts, each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.

                                       C-2
<PAGE>

          IN WITNESS  WHEREOF,  the undersigned  have executed,  or caused to be
executed, this Amendment as of the date first above written.

                                              KMC TELECOM HOLDINGS, INC.


                                              By: /s/ James D. Greenfell
                                                  ______________________________
                                                  Name:  James D. Greenfell
                                                  Title: Chief Financial Officer


                                              NEWCOURT COMMERCIAL FINANCE
                                                       CORPORATION


                                              By:  /s/ John P. Sirico
                                                  ______________________________
                                                  Name:  John P. Sirico, II
                                                  Title: Vice President

                                              LUCENT TECHNOLOGIES INC.


                                              By:  /s/ Leslie L. Rogers
                                                  ______________________________
                                                  Name:  Leslie L. Rogers
                                                  Title: Managing Director




Signature Page to
Amendment No. 1 to
Warrant Registration
Rights Agreement



                               AMENDMENT NO. 1 TO
                              THE WARRANT AGREEMENT

          AMENDMENT  NO. 1 dated as of April 30, 1999 to the Warrant  Agreement,
dated as of  February  4,  1999 (the  "Warrant  Agreement")  among  KMC  Telecom
Holdings,  Inc., The Chase Manhattan Bank, as Warrant Agent, Newcourt Commercial
Finance Corporation, Lucent Technologies, Inc. and First Union Investors, Inc.

                               W I T N E S S E T H

          WHEREAS,  the parties hereto desire to make certain  amendments to the
Warrant Agreement;

          NOW,  THEREFORE,  in  consideration of the premises and for other good
and  valuable  consideration  the  receipt and  sufficiency  of which are hereby
acknowledged, the parties hereto hereby agree as follows:

          1. DEFINED TERMS.  Unless  otherwise  defined herein,  all capitalized
terms  defined  in the  Warrant  Agreement  and  used  herein  are so used as so
defined.  In  addition,  the  following  terms shall have the meanings set forth
below:

          "PREFERRED  STOCK  WARRANT  AGREEMENT  2" means the Warrant  Agreement
dated as of April 30,  1999 among the  Company,  The Chase  Manhattan  Bank,  as
Warrant Agent and First Union  Investors,  Inc.,  which  Preferred Stock Warrant
Agreement 2 is being entered into in connection  with the execution and delivery
of the Purchase Agreement 2.

          "PREFERRED  STOCK  WARRANTS  2" means  Warrants  issued to  holders of
Series E Preferred  Stock pursuant to the Preferred  Stock Warrant  Agreement 2,
each such Warrant  initially  entitling the holder thereof to purchase  0.471756
shares of Common Stock at an exercise price of $.01 per share.

          "PURCHASE  AGREEMENT 2" means the Securities  Purchase Agreement dated
as of April 30, 1999 between the Company and First Union Investors, Inc.

          2. AMENDMENT TO SECTION 2.4(B) OF THE WARRANT AGREEMENT.

          Paragraph  (b) of Section 2.4 of the Warrant  Agreement  is amended to
read as follows:

          "(b) If the  Company  fails to redeem all shares of Series F Preferred
Stock prior to the date (the  "Springing  Warrant Date") which is the earlier of
(i) the date that is sixty  days after the date on which the  Company  closes an
underwritten  primary  offering  of at least $200  million  of its Common  Stock
pursuant to an effective registration statement under the Securities Act or (ii)
February  4, 2001,  then the  holders of  Eligible  Shares  shall be entitled to
receive the Springing Warrants. Each holder of Eligible Shares shall be entitled

<PAGE>

to receive a number of  Springing  Warrants  equal to (1) 227,273 plus the total
number of  Warrants  and  Preferred  Stock  Warrants  2 held by the  holders  of
Eligible Shares as of the date hereof,  multiplied by a fraction,  the numerator
of which shall be the aggregate liquidation preference of such holder's Eligible
Shares  and  the  denominator  of  which  shall  be  the  aggregate  liquidation
preference of all outstanding  Eligible Shares,  LESS (2) the number of Warrants
and Preferred  Stock Warrants 2 held by such holder of Eligible Shares as of the
date hereof.  On or after the Springing  Warrant Date, a holder or holders of at
least 10% or more of the  aggregate  outstanding  Eligible  Shares may deliver a
notice  to the  Warrant  Agent in the form set forth in  Exhibit  C hereto  (the
"Springing  Notice"),  accompanied  by a  certificate  of  the  Transfer  Agent,
certifying  as to the  number of shares of  Series F  Preferred  Stock  that are
outstanding as of such date."

          Paragraph  (c) of Section 2.4 of the Warrant  Agreement  is amended to
add the following sentence at the end thereof.

          "Upon receipt of a certificate for the number of Springing Warrants to
which it is entitled  under this Section  2.4(c),  First Union  Investors,  Inc.
shall deliver such  certificate  to the Company,  and the Company shall issue or
shall  cause  the  Warrant  Agent to issue to First  Union  Investors,  Inc.  in
exchange  therefor a  certificate  in the same form as for the  Preferred  Stock
Warrants 2. The Springing  Warrants issued to First Union Investors,  Inc. shall
be subject to the terms and conditions of the Preferred Stock Warrant  Agreement
2 and shall not be subject to the terms and conditions of this Agreement."

          3. AMENDMENTS TO SECTION 2.5 OF THE WARRANT AGREEMENT.

          The  first  sentence  of  Section  2.5 is  hereby  amended  to read as
follows:

          "From time to time, the Company may issue and sell additional Warrants
under this Agreement, or additional Warrants under this Agreement, together with
shares of Series E Preferred  Stock or Series F Preferred  Stock,  to Additional
Purchasers;  provided that, any such Additional  Purchaser shall agree to all of
the terms and conditions  of, and assume all of the rights and  obligations of a
"Purchaser" under this Agreement and the Warrant  Registration Rights Agreement,
such  action  to  be  evidenced  by  such  Additional  Purchaser  executing  and
delivering to the Company and the Warrant  Agent a counterpart  to the signature
page of this  Agreement  (in the form  attached  hereto  as  Exhibit  D) and the
Warrant   Registration   Rights  Agreement  (in  the  form  set  forth  herein);
notwithstanding the foregoing,  it is agreed that the Preferred Stock Warrants 2
issued to First Union Investors,  Inc. shall not be subject to this Agreement or
the Warrant Registration Rights Agreement and that any Springing Warrants issued
to First Union Investors,  Inc. pursuant to Section 2.4 of this Agreement shall,
upon issuance,  no longer be subject to the terms of this Agreement (as provided
in Section  2.4(c) of this  Agreement) or the terms of the Warrant  Registration
Rights Agreement."

          4. AMENDMENT TO EXHIBIT C TO THE WARRANT AGREEMENT.

          Exhibit C to the Warrant  Agreement is deleted and replaced by Exhibit
C hereto.


<PAGE>

          5. Except as expressly  amended  hereby,  all of the provisions of the
Stockholders  Agreement are hereby affirmed and shall continue in full force and
effect in accordance with their terms.

          6. This Amendment  shall be governed and construed in accordance  with
the laws of the  state  of  Delaware  applicable  to  agreements  made and to be
performed  entirely  within  such state,  without  regard to the  principles  of
conflicts of laws thereof.

          7. This Amendment may be executed in one or more counterparts, each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.



<PAGE>



          IN WITNESS  WHEREOF,  the undersigned  have executed,  or caused to be
executed, this Agreement as of the date first above written.

                                    KMC TELECOM HOLDINGS, INC.


                                     By: /s/ Michael Sternberg
                                        _______________________________
                                        Name:   Michael A. Sternberg
                                        Title:  President


                                     THE CHASE MANHATTAN BANK, as Warrant Agent


                                      By: /s/ P. Kelly
                                         ______________________________
                                         Name:  Patricia Kelly
                                         Title: Vice President


                                     NEWCOURT COMMERCIAL FINANCE CORPORATION


                                     By:/s/ John P. Sirico
                                        ______________________________
                                        Name:   John P. Sirico, II
                                        Title:  Vice President





<PAGE>



                                     LUCENT TECHNOLOGIES INC.


                                     By: /s/ Leslie L. Rogers
                                        ______________________________
                                        Name:  Leslie L. Rogers
                                        Title: Managing Director


                                     FIRST UNION INVESTORS, INC.


                                     By:/s/ Pearce Landry
                                        ____________________________
                                        Name:   Pearce A. Landry
                                        Title:  Vice President




<PAGE>



                                                                       EXHIBIT C


                                       [Date]


KMC Telecom Holdings, Inc.
1545 Route 206, Suite 300
Bedminster, NJ  07921


The Chase Manhattan Bank
450 West 33rd St., 15th Floor
New York, NY  10001-2697
Attention:  Capital Markets Fiduciary Services

Re:     Warrants (the "WARRANTS") to Purchase
        Common Shares of
        KMC Telecom Holdings, Inc. (the "COMPANY")


Ladies and Gentlemen:

          This notice is being  provided  pursuant to Section 2.4 of the Warrant
Agreement  dated as of February 4, 1999, as amended (the  "WARRANT  AGREEMENT"),
among  The Chase  Manhattan  Bank,  as  Warrant  Agent,  the  Company,  Newcourt
Commercial  Finance  Corporation,  Lucent  Technologies,  Inc.  and First  Union
Investors, Inc. and any Additional Purchaser (as described therein). Capitalized
terms not  otherwise  defined  herein  shall have the  meaning  set forth in the
Warrant Agreement.

          The  undersigned  hereby  certifies  that  (i)  [it  is][we  are]  the
holder[s] of at least 10% of the aggregate  outstanding Eligible Shares and that
(ii) as of the date of this  notice,  the Company has failed to redeem all share
of Series F Preferred Stock by the earlier of:

                                   (check one)

        (a)     |_|      the date that is sixty days after the date on which
                         the Company closes an underwritten  primary offering of
                         at least $200 million of its Common  Stock  pursuant to
                         an   effective   registration   statement   under   the
                         Securities Act;
                                       or
        (b)     |_|      February 4, 2001

          As a result in  accordance  with the  provisions of Section 2.4 of the
Warrant  Agreement,  each holder of Eligible Shares (or their transferees) shall
be entitled to receive a number of Springing  Warrants equal to (i) 227,273 plus
the total number of Warrants and Preferred  Stock Warrants 2 held by the holders
of Eligible Shares on April 30, 1999, multiplied by a fraction, the numerator of
which shall be the aggregate  liquidation  preference of such holder's  Eligible
Shares  and  the  denominator  of  which  shall  be  the  aggregate  liquidation
preference of all outstanding  Eligible Shares,  LESS (2) the number of Warrants

                                       C-1

<PAGE>

and Preferred  Stock Warrants 2 held by such holder of Eligible  Shares on April
30, 1999. The Warrant Agent is hereby authorized and directed to countersign and
deliver to each registered  holder of Eligible  Shares,  the number of Springing
Warrants each such holder is entitled to receive at such holder's address as set
forth on the records of the Transfer Agent for the Series E Preferred  Stock and
the Series F Preferred Stock.

                       [NAME OF HOLDER OF SERIES [E][F] PREFERRED STOCK

                       By:________________________
                       Name:
                       Title:

                       Number of shares of Series [E][F] preferred Stock:_______



                       [NAME OF HOLDER OF SERIES [E][F] PREFERRED STOCK

                       By:________________________
                       Name:
                       Title:

                       Number of shares of Series [E][F] preferred Stock:_______










                                      C-2



                                AMENDMENT NO. 2
                              TO WARRANT AGREEMENT


          This Amendment No. 2 to Warrant Agreement dated as of February 4, 1999
(as heretofore  amended,  the  "Agreement"),  is made as of June 1, 1999, by KMC
Telecom  Holdings,  Inc. (the  "Company"),  The Chase  Manhattan  Bank ("Warrant
Agent"),   Newcourt  Commercial  Finance  Corporation  ("Newcourt')  and  Lucent
Technologies Inc. ("Lucent").

                                       W I T N E S S E T H

          WHEREAS,  Newcourt and Lucent own  warrants to purchase  shares of the
Company's Common Stock ("Warrants");

          WHEREAS,  the  Company has issued  Warrants to First Union  Investors,
Inc, ("First Union") pursuant to a warrant  agreement dated as of April 30, 1999
(the "First Union Warrant Agreement");

          WHEREAS,  under the First  Union  Warrant  Agreement,  First Union is,
under certain circumstances,  entitled to and obligated to sell shares of Common
Stock for which it Warrants may be exercised;

          WHEREAS, Harold N. Kamine ("Kamine") and Nassau Capital Partners L. P.
("Nassau")  are  parties  to the  First  Union  Warrant  Agreement  for  limited
purposes;

          WHEREAS,  Newcourt and Lucent wish to have the rights and  obligations
to sell shares of Common  Stock for which their  Warrants  may be  exercised  as
First Union has under the First Union Warrant  Agreement,  and Kamine and Nassau
are  willing to agree to,  the  extension  of such  rights  and  obligations  to
Newcourt and Lucent.

          NOW, THEREFORE,  in consideration of the premises,  the parties hereto
agree as follows:

          1. DEFINED TERMS.  Unless  otherwise  defined herein,  all capitalized
terms  defined  in the  Agreement  and used  herein are used as so  defined.  In
addition, the following terms shall have the meanings set forth below:

          "Buyout Notice" has the meaning ascribed to such term in Section 8.6.

          "Capital  Stock" means capital stock or share capital of, and/or other
equity participations in, the Company, including, without limitation partnership
interests,  and/or conversion privileges,  warrants, options and/or other rights
to acquire such capital stock, share capital and/or other equity participations.



<PAGE>

          "Common Stock  Equivalents"  means any security or obligation which is
by its terms convertible into shares of Common Stock and any option,  warrant or
other subscription or purchase right with respect to Common Stock.

          "Existing  Stockholders" means those stockholders who are from time to
time parties to the  Stockholders  Agreement  dated as of October 31,  1997,  as
amended.

          "Fully  Diluted" or "Fully  Diluted  Basis"  means,  at any date as of
which the number of shares of Common Stock is to be  determined,  such number of
shares  determined  on  a  basis  that  includes  all  shares  of  Common  Stock
outstanding  at such date and the  maximum  shares of Common  Stock  issuable in
respect  of  Common  Stock  Equivalents  (giving  effect  to  the  then  current
respective  conversion  prices)  and  other  rights  to  purchase  (directly  or
indirectly) shares of Common Stock or Common Stock  Equivalents,  outstanding on
such  date,  whether  or not  such  rights  to  convert,  exchange  or  exercise
thereunder are presently exercisable,

          "Principal  Holders" means each of the following two groups (i) Nassau
Capital  Partners L. P. and its general and limited  partners and any Affiliates
of the  foregoing and (ii) Harold N. Kamine and his parents,  siblings,  spouse,
descendants,  heirs and devices,  and any trust or Person the sole beneficiaries
or equity holders of which are the foregoing Persons.

          "Tag-Along  Notice" has the  meaning  ascribed to such term in Section
8.5.

          "Tag-Along Purchaser" has the meaning ascribed to such term in Section
8.5.

          "Tag-Along  Shares" has the  meaning  ascribed to such term in Section
8.5.

          "Third  Party  Purchaser"  has the  meaning  ascribed  to such term in
Section 8.6.

          2.  ADDITION  OF  SECTION  8.5.  A new  Section  8.5 is  added  to the
Agreement to read in its entirety as follows:

          SECTION 8.5.  TAG-ALONG  RIGHT. (a) If any Principal Holder intends to
transfer to any Person  (other than another  Person that is included  within the
defined group of such Principal Holder,  provided that such transferee agrees in
writing to be bound by the terms of this Section 8.5 and new stock  certificates
containing a restrictive  legend referring to the transfer  restrictions of this
Section 8.5 are issued to such transferee) (the "TAG-ALONG  PURCHASER"),  in one
transaction or a series of related transactions  (excluding securities offerings
registered under the Securities Act), shares of Capital Stock  constituting,  in
the aggregate,  more than 20% of the total number of shares of Common Stock on a
Fully Diluted Basis owned by such  Principal  Holder as of April 30, 1999,  then
such Principal  Holder shall permit each of the Purchasers,  at such Purchaser's
option,  to  transfer,  for the same  consideration,  and on the same  terms and
conditions,  if any,  upon which the Principal  Holder  intends to transfer such
shares,  a number of shares of Common Stock  (including  shares  subject to then
exercisable  Warrants and Warrants that will become  exercisable  as a result of
such  transaction  or  series  of  transactions)  then  owned by such  Purchaser
determined in accordance with this Section 8.5(a) (the "TAG-ALONG SHARES"). Such
Purchaser  shall  have the  right,  pursuant  to this  Section  8.5(a),  to sell



<PAGE>

pursuant to the offer by the Tag-Along Purchaser,  a percentage of the shares of
Common Stock  (including  shares subject to then  exercisable  Warrants) held by
such Purchaser equal to the Applicable Percentage.

          (b)  For  purposes  hereof,  the  "APPLICABLE   PERCENTAGE"  shall  be
determined as follows:

               (i)  if  such  transaction  or  series  of  related  transactions
constitutes  the first  instance in which the rights under Section 8.5(a) apply,
the  Applicable  Percentage  shall be equal to the percentage of the holdings of
Capital Stock (on a Fully Diluted Basis) then owned by the applicable  Principal
Holder being  transferred in such transaction or series of related  transactions
by such Principal Holder (the "APPLICABLE HOLDER" for such transaction(s));

               (ii) if such transaction or series of related  transactions  does
not  constitute  the first  instance in which the rights  under  Section  8.5(a)
apply,  the  Applicable  Percentage  shall  be equal  to the  percentage  of the
holdings  of  Capital  Stock  (on a  Fully  Diluted  Basis)  then  owned  by the
Applicable  Holder being  transferred  in such  transaction or series of related
transactions by the Applicable Holder;  provided that the Applicable  Percentage
shall be zero if the  percentage  of the  holdings of Capital  Stock (on a Fully
Diluted  Basis) then owned by the  Applicable  Holder being  transferred in such
transaction or series of related  transactions  by the Applicable  Holder is not
greater than five percent.

          (c) Not less than 15  Business  Days  prior to any  proposed  transfer
pursuant to this Section 8.5, the Principal Holders shall deliver to each of the
Purchasers written notice thereof (the "TAG-ALONG  Notice"),  which notice shall
set forth the consideration to be paid by the Tag-Along  Purchaser and the other
terms and conditions,  if any, of such  transaction.  If any Purchaser elects to
transfer some or all of the Tag-Along  Shares pursuant to this Section 8.5, then
(i) such Purchaser shall so notify the Principal Holders within 10 Business Days
after the date of such Purchaser's receipt of Tag-Along Notice, and, (ii) at the
Principal Holders' request not less than two Business Days prior to the proposed
transfer,  such Purchaser shall deliver to counsel to the Principal Holders,  to
be held in escrow, certificates representing such Tag-Along Shares (and/or other
appropriate  documentation to permit the exercise of Warrants), duly endorsed or
with duly  completed  and  executed  stock powers  attached,  in proper form for
transfer,  together with a limited  power-of-attorney  authorizing the Principal
Holders  to  transfer  the  Tag-Along  Shares  to the  Tag-Along  Purchaser  (in
accordance with the terms and conditions set forth in the Tag-Along  Notice) and
to execute all other  documents  required to be executed in connection with such
transaction.

          (d) If,  within 30  Business  Days after any  Purchaser  notifies  the
Principal  Holder of such  Purchaser's  election to transfer  some or all of its
Tag-Along  Shares,  no  transfer  of shares  held by the  Principal  Holders and
Tag-Along  Shares in  accordance  with the  provisions of this Section 8.5 shall
have  been  completed,  then  such  Purchaser  shall  have the right at any time
thereafter to revoke its prior election relating to the Tag--Along Shares.  Upon
any such  revocation,  or earlier if the Principal Holder shall determine not to
proceed with such transfer,  then the Principal  Holder's counsel shall promptly
return to such  Purchaser,  in proper form, all  certificates  representing  the
Tag-Along Shares and the limited power-of-attorney  previously delivered by such
Purchaser  to the  Principal  Holders.  If,  within 30 Business  Days after such



<PAGE>

Purchaser  notifies the  Principal  Holder of such  Purchaser's  decision not to
transfer any Tag--Along  Shares (or, if no such notice is given,  the expiration
of the 10 Business  Day period for notice of an election to transfer  Tag--Along
Shares),  no transfer of shares held by the  Principal  Holders  shall have been
completed in accordance with the Tag--Along  Notice,  then the Principal Holders
must comply again with all of the  provisions  of this  Section  8.5,  including
without  limitation a new Tag--Along Notice and another  opportunity for each of
the Purchasers to elect to transfer Tag--Along Shares.

          (e)  Concurrently  with  the  consummation  of  the  transfer  of  the
Tag-Along Shares pursuant to this Section 8.5, the Principal Holders shall remit
or cause to be remitted to such Purchaser the consideration  with respect to the
Tag-Along  Shares so  transferred  and shall furnish such other  evidence of the
completion of such transfer and the terms and conditions (if any) thereof as may
reasonably be requested by such Purchaser.

          (f) The  provisions  of this  Section  8.5  shall  remain  in  effect,
notwithstanding  any return to any  Purchaser  of  Tag-Along  Shares as provided
herein.

          (g) Notwithstanding the exercise date described in Section 3.2, in the
event that such  Purchaser  holds Warrants that are not then  exercisable  under
Section 3.2 and such Purchaser would be entitled to tag-along rights pursuant to
this Section 8.5 if such Warrants  were  exercisable,  then such Warrants  shall
become exercisable,  at the election of such Purchaser,  to the extent necessary
to permit such Purchaser to utilize all of such tag-along rights. Alternatively,
such  Purchaser  shall be entitled to transfer to the Tag-Along  Purchaser  such
portion of its Warrants  representing the number of Tag-Along Shares which would
be transferred to the Tag-Along Purchaser if such Warrants were exercisable,  in
exchange  for the  consideration  which  would be payable  with  respect to such
Tag-Along Shares, less the Exercise Price for such Warrants.

          3.  ADDITION  OF  SECTION  8.6.  A new  Section  8.6 is  added  to the
Agreement to read in its entirety as follows:

          SECTION 8.6.  BRING ALONG RIGHT.  If the Company or one or more of the
Existing  Stockholders  receives a bona fide offer from a person or persons  not
then an Affiliate or Affiliates of the Company or such Existing  Stockholders (a
"Third Party Purchaser") to purchase Capital Stock representing more than 50% of
the total number of shares of Common Stock then  outstanding  on a Fully Diluted
Basis,  then the  Company  shall have the right to  deliver a written  notice (a
"Buyout  Notice")  to each of the  Purchasers  which  shall  state  (i) that the
Company or such Existing  Stockholders propose to effect such transaction,  (ii)
the proposed  purchase  price per share of Capital Stock to be paid by the Third
Party Purchaser,  and (iii) the name or names of the Third Party Purchaser,  and
which  attaches a copy of all  writings  between  the  Company or such  Existing
Stockholders  and the other parties to such  transaction  necessary to establish
the terms of such transaction.  Each of the Purchasers agrees that, upon receipt
of a Buyout Notice,  it shall be obligated to sell a percentage of its shares of
Common  Stock equal to the Bring Along  Percentage  (as defined  below) upon the
terms and  conditions  of such  transaction  (and  otherwise  take all necessary
action to cause consummation of the proposed  transaction);  PROVIDED,  HOWEVER,
that each such  Purchaser  shall only be  obligated  as  provided  above in this



<PAGE>

Section 8.6 if (i) more than 50% of the total  number of shares of Common  Stock
then  outstanding  on a Fully Diluted Basis  actually is sold to the Third Party
Purchaser  pursuant to the terms contained in the Buyout Notice,  (ii) each such
Purchaser receives the same per share (or per share equivalent) consideration as
the Company or such Existing  Stockholders  receive in the transaction and (iii)
the  consideration  received  by  such  Purchaser  is in the  form  of cash or a
combination  of cash and  securities  that will  become  freely  tradable in the
public  securities  markets within 180 days of receipt of such  consideration by
such Purchaser.  The Bring Along Percentage shall be the percentage of the total
number of shares of Common Stock  outstanding  an a Fully  Diluted Basis that is
actually sold to the Third Party  Purchaser  pursuant to the terms  contained in
the Buyout  Notice;  PROVIDED  THAT if,  after giving  effect to such sale,  the
Existing   Stockholders   would  own  not  more  than  twenty   percent  of  the
fully-diluted common equity interests in the Company, the Bring Along Percentage
shall be one hundred percent.

          4. Except as expressly  amended  hereby,  all of the provisions of the
Agreement  are hereby  affirmed  and shall  continue in full force and effect in
accordance their terms.

          5. This Amendment  shall be governed and construed in accordance  with
the laws of the  state  of New  York  applicable  to  agreements  made and to be
performed  entirely  within,  such state,  without  regard to the  principles of
conflicts of laws thereof.

          6. This Amendment may be executed in one or more counterparts, each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.




<PAGE>



          IN WITNESS WHEREOF,  the undersigned have executed,  or have caused to
be executed, this Agreement on the date first written above.

                                         KMC TELECOM HOLDINGS, INC.


                                         By:  /s/ James D. Grenfell
                                              ----------------------------------
                                              Name:  James D. Grenfell
                                              Title.  Chief Financial Officer

                                         THE CHASE MANHATTAN BANK


                                         By:  /s/ P. Kelly
                                              ----------------------------------
                                              Name:  Patricia Kelly
                                              Title.  Vice President

                                         NEWCOURT COMMERCIAL FINANCE
                                         CORPORATION


                                         By:  /s/ John P. Sirico, II
                                              ----------------------------------
                                              Name:  John P. Sirico, II
                                              Title.  Vice President


                                         LUCENT TECHNOLOGIES INC,


                                         By:  /s/ Leslie L. Rogers
                                              ----------------------------------
                                              Name:  Leslie L. Rogers
                                              Title.  Managing Director














Signature page to
Amendment
No. 2 to existing Warrant
Agreement



<PAGE>


                                     CONSENT

          Harold N. Kamine and Nassau Capital Partners,  L. P. hereby consent to
the foregoing Amendment No. 1 for the purpose of being bound by Sections 8.5 and
8.6 added to the Warrant Agreement by the Amendment.



                                         -------------------------------
                                         Harold N. Kamine


                                         NASSAU CAPITAL PARTNERS, L.P.
                                         By:      Nassau Capital L.L.C.,
                                                    its General Partner


                                                  By:  /s/ John G. Quigley
                                                       -------------------------
                                                       Name:  John G. Quigley
                                                       Title.  Member





























Signature page to
Amendment
No. 2 to existing Warrant
Agreement



          PREFERRED STOCK REGISTRATION RIGHTS AGREEMENT

          PREFERRED STOCK REGISTRATION  RIGHTS AGREEMENT,  dated as of April 30,
1999  (this  "AGREEMENT"),  between  KMC  TELECOM  HOLDINGS,  INC.,  a  Delaware
corporation (the "COMPANY"),  and FIRST UNION INVESTORS,  INC., a North Carolina
corporation ("FIRST UNION").

          WHEREAS,  pursuant to the terms of a Securities  Purchase Agreement of
even date  herewith  (the  "PURCHASE  AGREEMENT")  between the Company and First
Union,  the  Company  has  agreed to issue  and sell to First  Union a unit (the
"SERIES E UNIT"),  consisting of 35,000 shares of the Company's  Series E Senior
Redeemable,  Exchangeable,  PIK Preferred Stock (the "SERIES E PREFERRED STOCK")
and 94,513 warrants (each, a "WARRANT" and collectively,  the "WARRANTS"),  each
Warrant  initially  entitling the holder thereof to purchase  0.471756 shares of
Common Stock (as defined  below) of the Company at an exercise price of $.01 per
Common Share (as defined below);

          WHEREAS, the Company and First Union wish to set forth their agreement
with respect to certain rights and  obligations  regarding the  registration  of
shares of the Preferred Stock.

          In  consideration  of  the  foregoing  and of  the  mutual  agreements
contained  herein and in the Purchase  Agreement,  the Company and the Purchaser
hereby agree as follows:

          1. DEFINITIONS.

          As used in this  Agreement,  the following  capitalized  defined terms
shall have the following meanings:

          "Affiliate"  means, with respect to any Person,  (i) each Person that,
directly or indirectly,  owns or controls, whether beneficially or as a trustee,
guardian or other  fiduciary,  25% or more of the capital stock having  ordinary
voting power in the election of directors of such Person,  (ii) each Person that
controls,  is controlled  by or is under common  control with such Person or any
Affiliate of such Person, or (iii) each of such Person's  executive officers and
directors. For the purpose of this definition,  "control" of a Person shall mean
the  possession,  directly  or  indirectly,  of the power to direct or cause the
direction of its management or policies, whether through the ownership of voting
securities, by contract or otherwise.

          "Board of Directors"  means the board of directors of the Company from
time to time.

          "Commission"   means  the  United  States   Securities   and  Exchange
Commission.

          "Common  Stock" means the common stock,  par value $.01 per share,  of
the Company.


<PAGE>

          "Company" has the meaning specified in the recitals to this Agreement.

          "Demand Holder" has the meaning specified in Section 2.1.

          "Demand Registrations" has the meaning specified in Section 2.1.

          "Exchange Act" means the Securities  Exchange Act of 1934, as amended,
and the rules and regulations of the Commission thereunder.

          "Fully  Diluted  Basis"  means at any date as of which  the  number of
shares of Common Stock is to be determined,  on a basis  including all shares of
Common  Stock  outstanding  at such date and the maximum  shares of Common Stock
issuable  in  respect of Common  Stock  Equivalents  (giving  effect to the then
current respective  conversion prices) and other rights to purchase (directly or
indirectly) shares of Common Stock or Common Stock  Equivalents,  outstanding on
such date, to the extent such rights to convert, exchange or exercise thereunder
are  presently  exercisable.  For  purposes of this  definition,  "Common  Stock
Equivalents"  means any security or obligation which is by its terms convertible
into shares of Common  Stock and any option,  warrant or other  subscription  or
purchase right with respect to Common Stock.

          "NASD" means the National Association of Securities Dealers, Inc.

          "NASDAQ"  means  the  National   Association  of  Securities   Dealers
Automated Quotations System.

          "Person"  means  any  individual,   corporation,   partnership,  joint
venture,   association,   joint  stock  company,  trust,  fund,   unincorporated
association  or   organization  or  government  or  other  agency  or  political
subdivision thereof.

          "Purchase Agreement" has the meaning specified in the recitals.

          "Registrable  Securities" means the shares of Series E Preferred Stock
issued and sold to First Union under the Purchase Agreement.

          "Registration  Expenses" means all expenses  incident to the Company's
performance of or compliance with this Agreement,  including without  limitation
all  Commission  and stock  exchange  or NASD  registration  and filing fees and
expenses,  fees and  expenses of  compliance  with  securities  or blue sky laws
(including without  limitation  reasonable fees and disbursements of counsel for
the underwriters in connection with blue sky  qualificaitons  of the Registrable
Securities),  rating agency fees,  printing expenses,  messenger,  telephone and
delivery expenses, the fees and expenses incurred in connection with the listing
of the  securities  to be  registered  on each  securities  exchange or national
market system on which similar securities issued by the Company are then listed,
fees and disbursements of counsel for the Company and all independent  certified
public  accountants  (including the expenses of any annual audit,  special audit
and "cold  comfort"  letters  required by or incident  to such  performance  and
compliance),  securities  laws liability  insurance (if the Company so desires),
the fees and  disbursements of underwriters  (including  without  limitation all
fees and expenses of any  "qualified  independent  underwriter"  required by the
rules of the NASD) customarily paid by issuers or sellers of securities (but not


                                       2
<PAGE>

including any underwriting discounts or commissions  attributable to the sale of
Registrable Securities by the sellers of Registrable Securities), the reasonable
fees of counsel  selected  pursuant to Section  2.4(b)  hereof by First Union in
connection with each such registration,  the reasonable fees and expenses of any
special experts  retained by the Company in connection  with such  registration,
fees and expenses of other persons retained by the Company.

          "Registration Notice" has the meaning specified in Section 2.1(a).

          "Registration Statement" means a registration statement filed pursuant
to the Securities Act.

          "Securities  Act" means the United States  Securities  Act of 1933, as
amended.

          "Series E Preferred  Stock" has the meaning  specified in the recitals
to this Agreement.

          "Series E Unit" has the  meaning  specified  in the  recitals  to this
Agreement.

          2. DEMAND REGISTRATION RIGHTS.

          (a) RIGHT TO DEMAND.  At any time and from time to time after  October
__, 1999, First Union (referred to in this Section 2 as the "Demand Holder") may
request the Company to register  its  Registrable  Securities  in the manner set
forth herein by written notice (the  "REGISTRATION  NOTICE") to the Company only
if a disposition  of the  Registrable  Securities may not, in the opinion of the
Demand Holder,  be effected in the public  marketplace  (as opposed to a private
transaction  under the  Securities  Act) at equally  favorable  net terms to the
Demand Holder without  registration  of such shares under the Securities Act. In
the event that the Company  receives a  Registration  Notice,  the Company shall
effect a  registration  under the  Securities  Act of the number of  Registrable
Securities  determined  in  accordance  with  Section  2.1(c) on Form S-1 or any
similar long-form registration ("LONG-FORM REGISTRATIONS") or on Form S-2 or S-3
or  any  similar  short-form   registration   ("SHORT-FORM   REGISTRATIONS")  if
available.  All  registrations  requested  pursuant to this  Section  2.1(a) are
referred to herein as "Demand Registrations".

          (b) NUMBER OF DEMAND  REGISTRATIONS.  First  Union will be entitled to
obtain  up  to  two  (2)  Long-Form   Registrations   and  two  (2)   Short-Form
Registrations.  A  registration  will not count as a Long-Form  Registration  or
Short-Form Registration,  as the case may be, until such Demand Registration has
become  effective  and unless the Demand  Holder is able to register and sell at
least 66 2/3% of the  Registrable  Securities  requested  to be included in such
registration. Demand Registrations will be Short-Form Registrations whenever the
Company is permitted  to use any  applicable  short form.  After the Company has
become  subject to the reporting  requirements  of the Exchange Act, the Company
will use its best efforts to make  Short-Form  Registrations  available  for the
sale of Registrable Securities. The Company shall not be required to pay for any
expenses of any  registration  proceeding  begun pursuant to this Section 2.1(b)
(including  the Company's  internal  costs in  proceeding  on such  request,  as
reasonably  determined by the Company's Board of Directors) if the  registration
request is subsequently withdrawn,  unless the Demand Holder agrees to treat the
withdrawn request as a registration  undertaken pursuant to this Section 2.1(b);
PROVIDED,  that if the  Demand  Holder  withdraws  a  request  as a result  of a


                                       3
<PAGE>

material  adverse change in the condition,  business or prospects of the Company
or in the  market  for the  Company's  securities  from that known to the Demand
Holder at the time of its request, the Company, and not the Demand Holder, shall
be required to pay all the expenses  relating to the proposed  registration  and
such request shall not be treated as a registration for purposes of this Section
2.1(b).

          (c)  DEMAND  REGISTRATIONS.  Within  (a) 75  days  after  the  Company
receives a  Registration  Notice  with  respect  to the first  offer for sale of
Shares  pursuant to an  effective  registration  statement  filed by the Company
under the  Securities  Act or (b)  within 45 days after the  Company  receives a
Registration Notice with respect to any other demand  registration,  the Company
shall file with the Commission a registration statement under the Securities Act
for such Demand  Registration.  The Company  shall use its best efforts to cause
the Demand  Registration  to be declared  effective  under the Securities Act as
soon as is practical after filing,  and once effective,  the Company shall cause
such  Demand  Registration  to  remain  effective  for such  time  period  as is
specified in such request,  but for no time period longer than the period ending
on the earlier of (i) the one-year  anniversary  of the  effective  date of such
Demand Registration, (ii) the date on which all Registrable Securities have been
sold pursuant to the Demand Registration or (iii) the date as of which there are
no longer any  Registrable  Securities in  existence.  Each request for a Demand
Registration  shall specify the  approximate  number of  Registrable  Securities
requested to be registered  and the  anticipated  per share price range for such
offering.

          (d) PRIORITY ON DEMAND REGISTRATIONS.  The Company will not include in
any Demand  Registration  any securities  which are not  Registrable  Securities
without the prior written consent of the Demand Holder. If a Demand Registration
is an underwritten  offering and the managing underwriters advise the Company in
writing  that in their  opinion  the number of  Registrable  Securities  and, if
permitted hereunder,  other securities requested to be included in such offering
exceeds the number of Registrable Securities and other securities, if any, which
can be  sold  therein  without  adversely  affecting  the  marketability  of the
offering,  the  Company  will  include  in such  registration,  (i)  first,  the
Registrable  Securities requested to be included in such registration;  and (ii)
second, other securities, if any, requested to be included in such registration,
pro rata among the holders of such other securities,  on the basis of the number
of shares of other  securities  owned by each such  holder and  requested  to be
included therein.

          (e)  RESTRICTIONS  ON DEMAND  REGISTRATIONS.  The Company  will not be
obligated  to  effect  any  Demand  Registration  within  six  months  after the
effective date of a previous Demand Registration.  If at the time of any request
to register  Registrable  Securities pursuant to Section 2.1 hereof, the Company
is  engaged,  or has  fixed  plans to  engage  within 90 days of the time of the
request, in a registered public offering or is engaged in any activity which, in
the good  faith  determination  of the Board of  Directors,  would be  adversely
affected by the requested registration to the material detriment of the Company,
then the  Company may at its option  direct  that such  request be delayed for a
period not in excess of 60 days from the effective date of such offering, or the
date of commencement of such other material  activity,  as the case may be, such
right to delay a  request  to be  exercised  by the  Company  not more than once
within any twelve month period.


                                       4
<PAGE>

          (f) SELECTION OF UNDERWRITERS.  In the case of a Demand  Registration,
the  Company  shall have the right to select the  investment  banker or bankers,
underwriters and managers to administer the offering;  PROVIDED,  HOWEVER,  that
such  investment   banker  or  bankers,   underwriters  and  managers  shall  be
satisfactory to the Demand Holder.

          2.2. HOLDBACK AGREEMENTS.

          (a) First Union  agrees not to effect any public sale or  distribution
(including  sales  pursuant  to Rule 144  under  the  Securities  Act) of equity
securities,  including, without limitation, the Common Stock, of the Company, or
any  securities  convertible  into  or  exchangeable  or  exercisable  for  such
securities,  during the seven days prior to and the 180-day period  beginning on
the  effective  date of any  Demand  Registration  for a public  offering  to be
underwritten  on a firm  commitment  basis (except as part of such  underwritten
registration), unless the investment bankers or underwriters managing the public
offering otherwise agree.

          (b)  The  Company  agrees  (i)  not  to  effect  any  public  sale  or
distribution of its equity securities, including, without limitation, the Common
Stock,  or any securities  convertible  into or  exchangeable or exercisable for
such  securities,  during the seven days prior to and during the 180-day  period
beginning on the effective date of any underwritten Demand Registration  (except
as part of such underwritten registration), unless the underwriters managing the
registered  public  offering  otherwise  agree,  and (ii) to use best efforts to
cause  each  holder  of at least 5% (on a Fully  Diluted  Basis)  of its  equity
securities,  including,  without  limitation,  Common Stock,  or any  securities
convertible into or exchangeable or exercisable for such  securities,  purchased
from the Company at any time after the date of this  Agreement  (other than in a
registered  public offering or  distribution)  to agree not to effect any public
sale or distribution  (including sales pursuant to Rule 144 under the Securities
Act)  of any  such  securities  during  such  period  (except  as  part  of such
underwritten registration), unless the underwriters managing the public offering
or distribution otherwise agree.

          2.3. REGISTRATION PROCEDURES.  Whenever First Union has requested that
any Registrable Securities be registered pursuant to this Agreement, the Company
will  use its best  efforts  to  effect  the  registration  and the sale of such
Registrable  Securities in accordance  with the intended  method of  disposition
thereof, and pursuant thereto the Company will as expeditiously as possible:

          (a) prepare and file with the Commission a registration statement with
respect to such  Registrable  Securities  and use its best efforts to cause such
registration  statement  to become  effective  (provided  that  before  filing a
registration  statement or prospectus or any amendments or supplements  thereto,
the Company  will  furnish to the counsel  selected by First Union copies of all
such documents proposed to be filed);

          (b) subject to Section 2.3 (e) , prepare and file with the  Commission
such  amendments  and  supplements  to  such  registration   statement  and  the
prospectus  used in  connection  therewith  as may be  necessary  to  keep  such
registration  statement  effective  for a period of not less than six months and
comply with the provisions of the Securities Act with respect to the disposition
of all securities  covered by such registration  statement during such period in


                                       5
<PAGE>

accordance  with the intended  methods of disposition by the sellers thereof set
forth in such registration statement;

          (c) furnish to First Union such number of copies of such  registration
statement,  each amendment and supplement  thereto,  the prospectus  included in
such  registration  statement  (including each preliminary  prospectus) and such
other documents as such seller may reasonably request in order to facilitate the
disposition of the Registrable Securities;

          (d) use its best  efforts  to  register  or qualify  such  Registrable
Securities under such other securities or blue sky laws of such jurisdictions of
the United States of America as First Union  reasonably  requests and do any and
all other acts and things  which may be  reasonably  necessary  or  advisable to
enable First Union to consummate the  disposition in such  jurisdictions  of the
Registrable  Securities  (provided  that the Company will not be required to (i)
qualify  generally  to do  business  in any  jurisdiction  where  it  would  not
otherwise be required to qualify but for this subsection, (ii) subject itself to
taxation in any such jurisdiction or (iii) consent to general service of process
(i.e.,  service  of  process  which is not  limited  solely  to  securities  law
violations) in any such jurisdiction);

          (e) notify First Union, at any time when a prospectus relating thereto
is required to be delivered  under the  Securities  Act, of the happening of any
event  as a  result  of  which  the  prospectus  included  in such  registration
statement  contains  an untrue  statement  of a material  fact or omits any fact
necessary to make the statements therein not misleading,  and, at the request of
any such seller,  the Company will promptly prepare a supplement or amendment to
such  prospectus  so that,  as  thereafter  delivered to the  purchasers of such
Registrable Securities,  such prospectus will not contain an untrue statement of
a  material  fact or omit to state  any fact  necessary  to make the  statements
therein not misleading;  PROVIDED,  that upon not less than five days, notice to
First  Union,  the Company may defer the filing of an  amendment  or withdraw an
amendment or may defer the effectiveness of an amendment or the preparation of a
supplement  if the  Board of  Directors  determines,  in good  faith,  that such
amendment or  supplement,  or the  disclosure of any  information  in connection
therewith,  would  have a  material  adverse  affect  upon  the  Company  or its
subsidiaries;  and PROVIDED,  FURTHER, that the Company may not defer the filing
of any such amendment or supplement for more than 30 days;

          (f) use its best efforts to cause all such  Registrable  Securities to
be listed on each securities  exchange on which similar securities issued by the
Company are then  listed and, if not so listed,  to be listed on the NASDAQ and,
if listed on the NASDAQ,  use its best efforts to secure designation of all such
Registrable  Securities  covered by such  registration  statement as a "national
market system security" within the meaning of Rule 11Aa2-1 of the Commission or,
failing that, to secure NASDAQ  authorization  for such  Registrable  Securities
and, without  limiting the generality of the foregoing,  to arrange for at least
two  market  makers  to  register  as such  with  respect  to  such  Registrable
Securities with the NASD;

          (g) provide a transfer  agent and registrar  for all such  Registrable
Securities not later than the effective date of such registration statement;

          (h)  enter  into such  customary  agreements  (including  underwriting
agreements in customary  form) and take all such other actions as First Union or
the underwriters,  if any, reasonably request in order to expedite or facilitate


                                       6
<PAGE>

the disposition of such Registrable Securities  (including,  without limitation,
effecting a stock split or a combination of shares);

          (i)  make  available,   subject  to  any  confidentiality   agreements
reasonably  requested  by  the  Company,  for  inspection  by  First  Union  any
underwriter  participating  in any  disposition  pursuant  to such  registration
statement and any attorney, accountant or other agent retained by First Union or
underwriter,  all financial and other records, pertinent corporate documents and
properties  of  the  Company,  and  cause  the  Company's  officers,  directors,
employees  and  independent  accountants  to supply all  information  reasonably
requested by any First Union, such underwriter, attorney, accountant or agent in
connection with such registration statement;

          (j) otherwise use its best efforts to comply with all applicable rules
and  regulations  of the  Commission,  and, if required,  make  available to its
security  holders,  as soon as  reasonably  practicable,  an earnings  statement
covering the period of at least twelve  months  beginning  with the first day of
the  Company's  first full  calendar  quarter  after the  effective  date of the
registration statement, which earnings statement shall satisfy the provisions of
Section 11(a) of the Securities Act and Rule 158 thereunder;

          (k) in the event of the  issuance  of any stop  order  suspending  the
effectiveness  of a  registration  statement,  or of  any  order  suspending  or
preventing the use of any related  prospectus or suspending the qualification of
any equity securities, including, without limitation, the Common stock, included
in such registration  statement for sale in any  jurisdiction,  the Company will
use its reasonable best efforts promptly to obtain the withdrawal of such order;

          (1) use its best efforts to cause such Registrable  Securities covered
by such  registration  statement to be registered with or approved by such other
governmental  agencies or  authorities as may be necessary to enable the sellers
thereof to consummate the disposition of such Registrable Securities; and

          (m) obtain a "cold  comfort"  letter  from the  Company's  independent
public  accountants  in  customary  form and  covering  such matters of the type
customarily  covered  by  "cold  comfort"  letters  as  First  Union  reasonably
requests; and

          It shall be a condition  precedent to the obligation of the Company to
take any action  pursuant to this Agreement in respect of the  securities  which
are to be  registered  at the  request of First  Union that  First  Union  shall
furnish to the Company such  information  regarding the securities held by First
Union and the  intended  method of  disposition  thereof  as the  Company  shall
reasonably request in connection with such registration.

          2.4. REGISTRATION EXPENSES.

          (a) Except as  otherwise  expressly  provided in this  Agreement,  all
Registration Expenses will be borne by the Company.

          (b) Except as  otherwise  expressly  provided  in this  Agreement,  in
connection with each Demand Registration, the Company will reimburse First Union
for the reasonable fees and disbursements of one counsel chosen by First Union.


                                       7
<PAGE>

          2.5. INDEMNIFICATION.

          (a) The Company  agrees to indemnify  and hold  harmless,  to the full
extent permitted by law, First Union, its officers and directors and each Person
who controls First Union (within the meaning of the Securities  Act) against all
losses, claims,  damages,  liabilities and expenses arising out of or based upon
any untrue or  alleged  untrue  statement  of  material  fact  contained  in any
registration  statement,  prospectus or preliminary  prospectus or any amendment
thereof or supplement  thereto or any omission or alleged omission of a material
fact required to be stated therein or necessary to make the  statements  therein
not  misleading,  and shall  reimburse  First Union,  such director,  officer or
controlling person for any legal or other expenses  reasonably incurred by First
Union,  such  director,  officer or  controlling  person in connection  with the
investigation  or defense of such loss,  claim,  damage,  liability  or expense,
except insofar as the same are contained in any information furnished in writing
to the Company by First  Union  expressly  for use  therein or by First  Union's
failure to deliver a copy of the  registration  statement or  prospectus  or any
amendments or  supplements  thereto after the Company has furnished  First Union
with a  sufficient  number  of  copies  of  the  same.  In  connection  with  an
underwritten  offering,  the Company will  indemnify  such  underwriters,  their
officers and directors and each Person who controls  such  underwriters  (within
the meaning of the  securities  Act) to the same  extent as provided  above with
respect to the indemnification of First Union.

          (b) In connection with any registration statement in which First Union
is  participating,  First  Union  will  furnish to the  Company in writing  such
information as the Company  reasonably  requests for use in connection  with any
such  registration  statement or prospectus and, to the full extent permitted by
law, will  indemnify  and hold harmless the Company,  its directors and officers
and each Person who controls the Company  (within the meaning of the  Securities
Act) against any losses,  claims,  damages,  liabilities and expenses  resulting
from any untrue or alleged  untrue  statement of material fact  contained in the
registration  statement,  prospectus or preliminary  prospectus or any amendment
thereof or supplement  thereto or any omission or alleged omission of a material
fact required to be stated therein or necessary to make the  statements  therein
not misleading, but only to the extent that such untrue statement or omission is
contained in any  information so furnished in writing by First Union;  PROVIDED,
that the  obligation to indemnify  will be limited to the net amount of proceeds
received by First Union from the sale of Registrable Securities pursuant to such
registration statement.

          (c) Any Person  entitled to  indemnification  hereunder  will (i) give
prompt  written  notice to the  indemnifying  party of any claim with respect to
which it seeks  indemnification  and (ii)  unless  in such  indemnified  party's
reasonable  judgment  a  conflict  of  interest  between  such  indemnified  and
indemnifying  parties  may  exist  with  respect  to  such  claim,  permit  such
indemnifying  party to assume the defense of such claim with counsel  reasonably
satisfactory  to  the  indemnified  party.  If  such  defense  is  assumed,  the
indemnifying  party will not be subject to any liability for any settlement made
by the  indemnified  party  without its consent  (but such  consent  will not be
unreasonably  withheld). An indemnifying party who is not entitled to, or elects
not to,  assume the defense of a claim will not be obligated to pay the fees and
expenses  of  more  than  one  counsel  for  all  parties  indemnified  by  such
indemnifying party with respect to such claim, unless in the reasonable judgment
of any  indemnified  party  a  conflict  of  interest  may  exist  between  such


                                       8
<PAGE>

indemnified party and any other of such indemnified parties with respect to such
claim.

          (d) The  indemnification  provided for under this Agreement will be in
addition to any liability the indemnifying  party may otherwise have and without
prejudice to any other right or remedy the indemnified party may otherwise have,
which will remain in full force and effect  regardless  of any  omission to give
notice  (except  to  the  extent  such  omission  effects  the  ability  of  the
indemnifying  party to defend  such  claim) or any  investigation  made by or on
behalf of the indemnified party or any officer,  director or controlling  Person
of such  indemnified  party and will  survive the  transfer of  securities.  The
Company also agrees to make such provisions,  as are reasonably requested by any
indemnified  party,  for  contribution  to such party in the event the Company's
indemnification is unavailable for any reason.

          2.6.  PARTICIPATION  IN  UNDERWRITTEN  REGISTRATIONS.  No  Person  may
participate in any  registration  hereunder  which is  underwritten  unless such
Person (a) agrees to sell such Person's  securities on the basis provided in any
underwriting  arrangements  approved by the Person or Persons entitled hereunder
to approve such  arrangements  and (b)  completes  and  executes  all  customary
questionnaires,  powers of attorney,  indemnities,  underwriting  agreements and
other  documents  reasonably  required  under  the  terms  of such  underwriting
arrangements;  PROVIDED,  that First  Union  shall not be  required  to make any
representations  or  warranties  to the Company or the  underwriters  other than
representations and warranties  regarding First Union and First Union's intended
method of distribution.

          3. MISCELLANEOUS.

          3.1. NOTICES. All notices or other communication required or permitted
hereunder shall be in writing and shall be delivered  personally,  telecopied or
sent by certified,  registered or express mail, postage prepaid. Any such notice
shall be  deemed  given  when so  delivered  personally,  telecopied  or sent by
certified, registered or express mail or, if mailed, five days after the date of
deposit in the United States mail, as follows:

          (a) if to the Company:

                     KMC Telecom Holdings, Inc.
                     1545 Route 206
                     Bedminster, New Jersey  07921
                     Attn: James D. Grenfell
                     Chief Financial Officer
                     Telecopier No:  (908) 719-8775


                                       9
<PAGE>

          with a copy to:

                     Kelley Drye & Warren, LLP
                     101 Park Avenue
                     New York, New York  10178
                     Attn:  Alan Epstein, Esq.
                     Telecopier No:  (212) 808-7898/7899

          if to First Union:

                     First Union Investors, Inc.
                     1 First Union Center
                     5th Floor
                     301 South College
                     Charlotte, NC  28288
                     Attn:  L. Watts Hamrick, III
                     Telecopier No:  (704) 374-6711

          with a copy to:

                     Kennedy Covington Lobdell & Hickman, LLP
                     Bank of America Corporate Center
                     Suite 4200
                     100 North Tryon Street
                     Charlotte, North Carolina 28202-4006
                     Attn:  Eugene C. Pridgen, Esq.
                     Telecopier No:  (704) 331-7598

          Any party may by notice  given in  accordance  with this  Section  3.1
designate another address or person for receipt of notices hereunder.

          3.2. AMENDMENT AND WAIVER.

          (a) No failure or delay on the part of any party hereto in  exercising
any right,  power or remedy  hereunder  shall operate as a waiver  thereof,  nor
shall any single or partial exercise of any such right, power or remedy preclude
any other or further exercise thereof or the exercise of any other right,  power
or remedy. The remedies provided for herein are cumulative and are not exclusive
of any remedies that may be available to the parties hereto at law, in equity or
otherwise.

          (b) Any amendment,  supplement or  modification of or to any provision
of this  Agreement,  any  waiver of any  provision  of this  Agreement,  and any
consent to any  departure  by any party from the terms of any  provision of this
Agreement,  shall be  effective,  (i) only if it is made or given in writing and
signed  by the  parties  and  (ii)  only in the  specific  instance  and for the
specific purpose for which made or given.


                                       10
<PAGE>

          3.3. SPECIFIC PERFORMANCE.  The parties hereto intend that each of the
parties have the right to seek damages or specific performance in the event that
any other party  hereto fails to perform  such  party's  obligations  hereunder.
Therefore,  if any party shall institute any action or proceeding to enforce the
provisions  hereof,  any party against whom such action or proceeding is brought
hereby  waives  any claim or defense  therein  that the  plaintiff  party has an
adequate remedy at law.

          3.4.  HEADINGS.  The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

          3.5.  SEVERABILITY.  If any one or more  of the  provisions  contained
herein, or the application thereof in any circumstance, is held invalid, illegal
or  unenforceable  in any respect for any reason,  the  validity,  legality  and
enforceability of any such provision in every other respect and of the remaining
provisions  hereof shall not be in any way impaired,  unless the provisions held
invalid, illegal or unenforceable shall substantially impair the benefits of the
remaining provisions hereof.

          3.6. ENTIRE AGREEMENT.  This Agreement is intended by the parties as a
final  expression of their agreement and intended to be a complete and exclusive
statement of the agreement and understanding of the parties hereto in respect of
the subject  matter  contained  herein and therein.  There are no  restrictions,
promises, warranties or undertakings,  other than those set forth or referred to
herein  or  therein.   This  Agreement   supersedes  all  prior  agreements  and
understandings between the parties with respect to such subject matter.

          3.7. TERM OF AGREEMENT.  The provisions of this Agreement shall become
effective upon the execution hereof and shall terminate as provided herein.

          3.8.  VARIATIONS IN PRONOUNS.  All pronouns and any variations thereof
refer to the masculine,  feminine or neuter,  singular or plural, as the context
may require.

          3.9.  GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE  APPLICABLE TO AGREEMENTS MADE
AND TO BE PERFORMED ENTIRELY WITHIN SUCH STATE, WITHOUT REGARD TO THE PRINCIPLES
OF CONFLICTS OF LAW THEREOF.

          3.10. FURTHER  ASSURANCES.  Each of the parties shall, and shall cause
their respective Affiliates to, execute such instruments and take such action as
may be reasonably  required or desirable to carry out the provisions  hereof and
the transactions contemplated hereby.

          3.11. SUCCESSORS AND ASSIGNS. This Agreement shall be binding upon and
inure to the  benefit of the  parties and their  respective  successors,  heirs,
legatees and legal  representatives.  This Agreement is not assignable except in
connection with a transfer of Shares in accordance with this Agreement.

          3.12.  COUNTERPARTS.  This  Agreement  may be  executed in one or more
counterparts,  each of which shall be deemed an original, and all of which taken
together shall constitute one and the same instrument.


                                       11
<PAGE>

          IN WITNESS WHEREOF, the undersigned have executed, or have cause to be
executed, this Agreement on the date first written above.

                                      KMC TELECOM HOLDINGS, INC.

                                      By: /s/ Michael Sternberg
                                         _____________________________________
                                         Name:  Michael A. Sternberg
                                         Title: President

                                      FIRST UNION INVESTORS, INC.

                                      By: /s/ Pearce Landry
                                         ____________________________
                                         Name:   Pearce A. Landry
                                         Title:  Vice President







                               AMENDMENT NO. 1 TO
                  PREFERRED STOCK REGISTRATION RIGHTS AGREEMENT


          This Amendment No. 1 to Preferred Stock Registration  Rights Agreement
dated as of April 30, 1999 is made as of June 1, 1999 by KMC  Telecom  Holdings,
Inc. (the  "Company"),  First Union Investors,  Inc.  ("First Union"),  Newcourt
Commercial  Finance  Corporation  ("Newcourt")  and  Lucent  Technologies,  Inc.
("Lucent").

                               W I T N E S S E T H

         WHEREAS,  First  Union owns  shares of the  Company's  Series E Senior,
Redeemable, Exchangeable, PIK Preferred Stock (the "Series E Preferred Stock");

         WHEREAS, the Company and First Union are parties to the Preferred Stock
Registration  Rights  Agreement  dated as of April  30,  1999  concerning  First
Union's Series E Preferred Stock (the "Agreement");

         WHEREAS,  Newcourt  owns  shares of the  Company's  Series E  Preferred
Stock,  and shares of the Company's Series F Senior,  Redeemable,  Exchangeable,
PIK Preferred Stock (the "Series F Preferred Stock"),  and Lucent owns shares of
the Series F Preferred Stock;

         WHEREAS,  the Company wishes to extend the registration  rights granted
to First  Union with  respect to its Series E Preferred  Stock to  Newcourt  and
Lucent with  respect to their  shares of Series E  Preferred  Stock and Series F
Preferred Stock, respectively;

         WHEREAS,  First  Union  wishes  to  consent  to the  granting  of  such
registration rights to Newcourt and Lucent.

         NOW,  THEREFORE,  in consideration of the premises,  the parties hereto
agree as follows:

         1. DEFINED TERMS.  Unless  otherwise  defined  herein,  all capitalized
terms  defined  in the  Agreement  and used  herein are used as so  defined.  In
addition,  the following terms shall have the meanings set forth below,  and, to
the extent that such terms also appear in the Agreement,  the meanings set forth
below shall replace the meanings set forth in the Agreement:

         "Registrable  Securities"  means the shares of Series E Preferred Stock
issued and sold to First Union under the Securities  Purchase Agreement dated as
of April 30, 1999, the shares of Series E Preferred  Stock, the shares of Series
F Preferred  Stock  issued and sold to Newcourt  under the  Securities  Purchase
Agreement  dated as of  February  4, 1999,  and the shares of Series F Preferred
Stock issued and sold to Lucent under the Securities Purchase Agreement dated as
of February 4, 1999.

         2. INSERTION OF NEW SUBHEADING.  A new subheading is inserted below the
heading "2. DEMAND REGISTRATION RIGHTS." to read "2.1 DEMAND RIGHTS."


<PAGE>

         3. AMENDMENT TO SECTION 2.1(A). The first sentence of Section 2.1(a) of
the Agreement is amended to read in its entirety as follows:

            "At any time and from time to time after  October  30,  1999,  First
         Union,  Newcourt and Lucent (each  referred to in this Section 2 as the
         "Demand  Holder") may request the Company to register  its  Registrable
         Securities  in the  manner  set forth  herein by  written  notice  (the
         "REGISTRATION  NOTICE") to the  Company  only if a  disposition  of the
         Registrable Securities may not, in the opinion of the Demand Holder, be
         effected in the public marketplace (as opposed to a private transaction
         under the Securities Act) at equally  favorable net terms to the Demand
         Holder without registration of such shares under the Securities Act."

         4. AMENDMENT TO SECTION 2.1(B). The first sentence of Section 2.1(b) of
the Agreement is amended to read in its entirety as follows:

            "Each of First Union, Newcourt and Lucent will be entitled to obtain
         up  to  two  (2)  Long-Form   Registrations   and  two  (2)  Short-Form
         Registrations."

         5. AMENDMENT TO SECTION 2.2(A). The first sentence of Section 2.2(a) of
the  Agreement  is amended by replacing  the words "First  Union" with the words
"Each of First Union, Newcourt and Lucent".

         6. AMENDMENT TO SECTION 2.3. The  introductory  language of Section 2.3
of the  Agreement is amended by replacing the words "First Union" with the words
"any of First Union, Newcourt and Lucent".

         7.  AMENDMENT  TO SECTION  2.3(A),  (C),  (D),  (E),  (H), (I) AND (M).
Sections  2.3(a),  (c), (d), (e), (h), (i) and (m) of the Agreement are amended,
in each case by replacing  each  occurrence  of the words "First Union" with the
words "First Union,  Newcourt or Lucent, as the case may be,". Section 2.3(m) is
further amended by deleting ";and" at the end and replacing the deleted material
with a period. The final paragraph of Section 2.3, which is not designated by an
alphabetic character,  is also amended by replacing each occurrence of the words
"First Union" with the words "First Union,  Newcourt or Lucent,  as the case may
be,".

         8.  AMENDMENT TO SECTION  2.4(B).  Section  2.4(b) of the  Agreement is
amended to read in its entirety as follows:

             "(b) Except as otherwise  expressly provided in this Agreement,  in
         connection  with each Demand  Registration,  the Company will reimburse
         First Union, Newcourt or Lucent, as the case may be, for the reasonable
         fees and  disbursements  of  counsel  chosen by it. If more than one of
         First Union,  Newcourt and Lucent are  participating in a registration,
         whether by virtue of coincident demand or otherwise, they shall jointly
         select  counsel and the Company will only be obligated to reimburse any
         or all of them  for  the  reasonable  fees  and  disbursements  of once
         counsel chosen by them."



                                       2
<PAGE>

         9. AMENDMENT TO SECTION 2.5(A) AND (B).  Sections 2.5(a) and (b) of the
Agreement are amended,  in each case by replacing  each  occurrence of the words
"First Union" with the words "First Union,  Newcourt or Lucent,  as the case may
be,".

         10.  AMENDMENT TO SECTION 2.6.  Section 2.6 of the Agreement is amended
to read in its entirety as follows:

              "2.6. PARTICIPATION IN UNDERWRITTEN  REGISTRATIONS.  No Person may
         participate in any registration  hereunder which is underwritten unless
         such Person (a) agrees to sell such  Person's  securities  on the basis
         provided  in any  underwriting  arrangements  approved by the Person or
         Persons  entitled  hereunder  to  approve  such  arrangements  and  (b)
         completes  and  executes  all  customary   questionnaires,   powers  of
         attorney,  indemnities,  underwriting  agreements  and other  documents
         reasonably required under the terms of such underwriting  arrangements;
         PROVIDED,  that First  Union,  Newcourt or Lucent,  as the case may be,
         shall not be required to make any  representations or warranties to the
         Company or the underwriters other than  representations  and warranties
         regarding itself and its intended method of distribution."

         11.  AMENDMENT TO SECTION 3.1.  Section 3.1 of the Agreement is amended
by adding the following after the address for First Union and its counsel:

              if to Newcourt:

                      Newcourt Commercial Finance Corporation
                      2 Gatehall Drive
                      Parsippany, New Jersey 07054
                      Attn: Vice President--Credit
                      Fax:  (973) 355-7644

              with a copy to:

                      Newcourt Commercial Finance Corporation
                      2 Gatehall Drive
                      Parsippany, New Jersey 07054
                      Attn: Vice President--Legal
                      Fax:  (973) 355-7645

              if to Lucent:

                      Lucent Technologies, Inc.
                      283 King George Road
                      Room A1D 27
                      Warren, New Jersey 07059
                      Attn:  Sue Colross
                      Fax:  (908) 558-1705

              with a copy to:

                      Sidley & Austin
                      875 Third Avenue
                      New York, New York 10001
                      Attn:  Irving L. Rotter
                      Fax:   (212) 906-2021



                                       3
<PAGE>

         12. Except as expressly  amended  hereby,  all of the provisions of the
Agreement  are hereby  affirmed  and shall  continue in full force and effect in
accordance with their terms.

         13. This Amendment  shall be governed and construed in accordance  with
the laws of the  state  of  Delaware  applicable  to  agreements  made and to be
performed  entirely  within  such state,  without  regard to the  principles  of
conflicts of laws thereof.

         14. This Amendment may be executed in one or more counterparts, each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.




















                                       4
<PAGE>



         IN WITNESS WHEREOF, the undersigned have executed, or have caused to be
executed, this Amendment on the date first written above.



                                           KMC TELECOM HOLDINGS, INC.


                                           By:  /s/ James D. Grenfell
                                                -----------------------------
                                                Name:  James D. Grenfell
                                                Title:  Chief Financial Officer

                                           FIRST UNION INVESTORS, INC.


                                            By: /s/ Pearce Landry
                                                -----------------------------
                                                Name:  Pearce A. Landry
                                                Title:  Vice President

                                            NEWCOURT COMMERCIAL FINANCE
                                            CORPORATION


                                            By: /s/ John P. Sirico II
                                                -----------------------------
                                                Name:  John P. Sirico II
                                                Title: Vice President

                                            LUCENT TECHNOLOGIES, INC.


                                            By: /s/ Leslie L. Rogers
                                                -----------------------------
                                                Name:  Leslie L. Rogers
                                                Title: Managing Director








Signature Page to
Amendment No. 1 to
Preferred Stock
Registration Rights
Agreement




                               AMENDMENT NO. 5 TO
                 THE AMENDED AND RESTATED STOCKHOLDERS AGREEMENT

          AMENDMENT NO. 5 dated as of April 30, 1999 to the Amended and Restated
Stockholders Agreement, dated as of October 31, 1997 (as heretofore amended, the
"Stockholders  Agreement")  among KMC Telecom  Holdings,  Inc.,  Nassau  Capital
Partners  L.P.,  NAS Partners I L.L.C.,  Harold N. Kamine,  Newcourt  Commercial
Finance Corporation (as successor to AT&T Credit Corporation),  General Electric
Capital Corporation, First Union National Bank (as successor to CoreStates Bank,
N.A.), CoreStates Holdings, Inc., and ., KMC Telecommunications L.P.

                               W I T N E S S E T H

          WHEREAS,  the parties hereto desire to make certain  amendments to the
Stockholders Agreement;

          NOW,  THEREFORE,  in  consideration of the premises and for other good
and  valuable  consideration  the  receipt and  sufficiency  of which are hereby
acknowledged, the parties hereto hereby agree as follows:

          1. DEFINED TERMS.  Unless  otherwise  defined herein,  all capitalized
terms  defined in the  Stockholders  Agreement and used herein are so used as so
defined.  In  addition,  the  following  terms shall have the meanings set forth
below:

          "HYDO II" means the  offering  and sale of not more than  $300,000,000
aggregate   principal   amount  of  Senior   Notes  due  2009  of  the  Company,
substantially in the manner  contemplated by a purchase  agreement to be entered
into between the Company and Morgan  Stanley & Co.  Incorporated,  Credit Suisse
First  Boston,  First  Union  Capital  Markets,  CIBC  Oppenheimer,   BancBoston
Robertson Stephens Inc. and Wasserstein Perella & Co. Inc..

          "PREFERRED STOCK  REGISTRATION  RIGHTS  AGREEMENT" means the Preferred
Stock  Registration  Rights  Agreement  dated as of April 30,  1999  between the
Company and First Union Investors, Inc.

          "PREFERRED  STOCK  WARRANT  AGREEMENT  2" means the Warrant  Agreement
dated as of April 30,  1999 among the  Company,  The Chase  Manhattan  Bank,  as
Warrant Agent and First Union  Investors,  Inc.,  which  Preferred Stock Warrant
Agreement 2 is being entered into in connection  with the execution and delivery
of the Purchase Agreement 2.

          "PREFERRED  STOCK  WARRANT  SHARES 2" means  shares  of  Common  Stock


<PAGE>

issuable upon exercise of Preferred  Stock Warrants 2, such other  securities as
shall be issuable upon the exercise of Preferred  Stock Warrants 2, or shares of
Common Stock or other  securities  received upon the exercise of Preferred Stock
Warrants 2.

          "PREFERRED  STOCK  WARRANTS  2" means  Warrants  issued to  holders of
Series E Preferred  Stock pursuant to the Preferred  Stock Warrant  Agreement 2,
each such Warrant  initially  entitling the holder thereof to purchase  0.471756
shares of Common Stock at an exercise price of $.01 per share.

          "PURCHASE  AGREEMENT 2" means the Securities  Purchase Agreement dated
as of April 30, 1999 among the Company and First Union Investors, Inc.

          "REGISTRATION  RIGHTS  AGREEMENT  II"  means the  Registration  Rights
Agreement  to be entered  into  between  the  Company  and Morgan  Stanley & Co.
Incorporated,  Credit Suisse First Boston,  First Union  Capital  Markets,  CIBC
Oppenheimer,  BancBoston  Robertson Stephens Inc. and Wasserstein Perella & Co.,
Inc.,  relating  to the  granting  by the  Company of  Registration  Rights with
respect to the 2009 Senior Notes.

          "2009  SENIOR  NOTES"  means the Senior Notes due 2009 to be issued by
the Company in connection with the HYDO II.

          "WARRANT   REGISTRATION   RIGHTS   AGREEMENT   2"  means  the  Warrant
Registration  Rights  Agreement dated as of April 30, 1999 among the Company and
First Union Investors,  Inc., which Warrant  Registration  Rights Agreement 2 is
being  entered  into in  connection  with  the  execution  and  delivery  of the
Preferred Stock Warrant Agreement 2.

          2. AMENDMENTS TO SECTION 5 OF THE STOCKHOLDERS AGREEMENT. Paragraph(a)
of Section 5 of the Stockholders Agreement is amended to read as follows:

               PUT  RIGHT.  (a)  Subject  to  the  covenants  contained  in  the
indentures  entered into in connection  with the Senior  Discount Notes and 2009
Senior Notes if no Liquidity  Event shall have  occurred by the later of October
22, 2003 or 90 days following the final maturity date of debt securities  issued
in the  HYDO  II,  then  each of  Nassau  and its  Affiliates,  AT&T,  GECC  and
CoreStates  shall  have the right,  at any time  thereafter,  by giving  written
notice to the Company (a "PUT NOTICE"),  to require the Company to repurchase (a
"PUT") all or any portion of the shares of Convertible Preferred Stock or Common
Stock held by such Stockholder for an amount (the "PUT AMOUNT") equal to (A) the
fair market value of the shares subject to such Put as determined within 30 days
of each  Put  Notice  by an  investment  bank of  national  reputation  which is
mutually acceptable to the Company and holders of a majority of the voting power
of Common Stock and Common Stock Equivalents held by all parties exercising Puts
hereunder or (B) in the case of any shares of Convertible  Preferred  Stock,  at


<PAGE>

the liquidation preference thereof plus all accrued and unpaid dividends, at the
option of holders  thereof;  provided that AT&T,  GECC and CoreStates  shall not
have the right to exercise a Put hereunder  unless Nassau or its Affiliates have
exercised a Put; and provided  further that the Company may not  repurchase  any
shares of Convertible  Preferred  Stock or Common Stock hereunder so long as the
Series E Preferred  Stock or the Series F  Preferred  Stock  remain  outstanding
unless the holders of the Series E Preferred Stock and the holders of the Series
F  Preferred  Stock  have  waived in  writing  their  right to have the  Company
repurchase  their Series E Preferred Stock and Series F Preferred Stock prior to
the  repurchase by the Company of any shares of Convertible  Preferred  Stock or
Common Stock hereunder.  The Company shall give AT&T, GECC and CoreStates prompt
notice of Nassau's  intent to exercise a Put.  The Company  shall give notice to
Nassau and the other Stockholders of any exercise of the Put right under Section
14 of either of the Subsidiary  Warrants or hereunder.  The Company shall pay to
the party  exercising  a Put the Put  Amount  within 60 days of the date of such
determination  of  fair  market  value.  Any  unpaid  balance  of a  Put  Amount
thereafter  shall bear interest,  which interest shall be paid together with any
payment of such Put Amount,  at a rate of 18.0% per annum (the "DEFAULT  RATE");
provided  that  accrual of interest at the Default  Rate shall not  constitute a
waiver of any party exercising a Put hereunder to receive  immediate  payment of
the Put Amount.

          2. AMENDMENTS TO SECTIONS 6.1 AND 6.2 OF THE  STOCKHOLDERS  AGREEMENT.
Paragraph  (g)  of  Section  6.1  and  paragraph  (c)  of  Section  6.2  of  the
Stockholders Agreement are amended to read as follows:

          6.1 DEMAND REGISTRATIONS.

          (g) OTHER REGISTRATION  RIGHTS. (i) Within the limitations  prescribed
by this paragraph  (i), but not  otherwise,  the Company may grant to subsequent
investors  in the  Company  rights  of  incidental  registration  (such as those
provided in Section  6.2).  Such rights may only pertain to the Senior  Discount
Notes and Warrant  Shares,  in the case of the HYDEO,  Preferred  Stock  Warrant
Shares, in the case of the Preferred Stock Warrant Agreement, 2009 Senior Notes,
in the case of the HYDO II, and Preferred Stock Warrant Shares 2, in the case of
the Preferred Stock Warrant Agreement 2. Such rights may be granted with respect
to (a) registrations  actually  requested by a Demand Holder pursuant to Section
6.1,  but only in respect of that  portion of any such  registration  as remains
after inclusion of all Registrable Securities requested by the Demand Holder and
(b) registrations  initiated by the Company, but only in respect of that portion
of such  registration as is available under the limitations set forth in Section
6.2(c)  (which  limitations  shall apply pro rata to all holders of  Registrable
Securities)  and such  rights  shall be  limited  in all cases to sharing in the
available  portion of the  registration  in question with holders of Registrable
Securities and other investors as provided in Section 6.2(c), such sharing to be
based on the number of shares of Common Stock held by the respective  holders of
Registrable  Securities  and held by such  other  investors,  plus the number of


<PAGE>

shares of Common  Stock  into  which  other  securities  held by the  holders of
Registrable  Securities  and such other  investors  are  convertible,  which are
entitled to registration  rights.  With respect to  registrations  which are for
underwritten public offerings,  "available portion" as used above shall mean the
portion of the  underwritten  shares  which is available as specified in clauses
(a) and (b) of the third sentence of this paragraph (i).  Shares not included in
such underwriting shall not be registered.

               (ii) The Company  may not grant to  subsequent  investors  in the
Company rights of  registration  upon request (such as those provided in Section
6.1)  unless (a) such  rights are  limited  to shares of Common  Stock;  (b) the
Demand  Holders  are given  enforceable  contractual  rights to  participate  in
registrations  requested by such subsequent  investors (but subject to the right
of priority of registration in the following  order:  such subsequent  investors
and  the  holders  of  Registrable   Securities  on  a  pro  rata  basis),  such
participation  to be on the  pro  rata  basis  and  subject  to the  limitations
described in the final three  sentences of paragraph (i) of this Section 6.1(g);
(c) such rights shall not become  effective prior to 90 days after the effective
date of the first  registration  pursuant  to Section  6.1;  and (d) such rights
shall  not  be  more  favorable  than  those  granted  to  the  Demand  Holders.
Notwithstanding  the  foregoing  or anything to the  contrary  contained in this
Agreement, the Company may file shelf registrations under the Securities Act (v)
as  required  by  Section  3  of  the  Warrant  Registration  Rights  Agreement,
substantially  upon the terms and subject to the conditions  contained  therein,
(w)  as  required  by  Section  2(b)  of  the  Registration   Rights  Agreement,
substantially  upon the terms and subject to the conditions  contained  therein,
(x) as required by Section 3 of the 1999 Warrant  Registration Rights Agreement,
substantially  upon the terms and subject to the conditions  contained  therein,
(y) as  required  by  Section  2(b) of the  Registration  Rights  Agreement  II,
substantially upon the terms and subject to the conditions contained therein and
(z) as required by Section 3 of the Warrant  Registration  Rights  Agreement  2,
substantially  upon the terms and subject to the conditions  contained  therein.
Notwithstanding  the  foregoing  or anything to the  contrary  contained in this
Agreement,  the Company may grant registration rights to the holders of Series E
Preferred Stock pursuant to the Preferred Stock Registration Rights Agreement as
provided therein.

          6.2 PIGGYBACK REGISTRATIONS.

          (c) PRIORITY ON PRIMARY REGISTRATIONS.  If a Piggyback Registration is
an underwritten  primary registration on behalf of the Company, the Company will
include in such  registration  all  securities  requested to be included in such
registration;  PROVIDED, that if the managing underwriters advise the Company in
writing that in their opinion the number of securities  requested to be included
in such  registration  exceeds  the  number  which can be sold in such  offering
without adversely  affecting the price,  timing or distribution of the offering,
the Company will include in such  registration  (i) first,  the  securities  the
Company proposes to sell, (ii) second, the Registrable  Securities  requested to
be included in such registration, pro rata among the holders of such Registrable


<PAGE>

Securities on the basis of the number of  Registrable  Securities  owned by each
such  holder and  requested  to be  included  therein,  and (iii)  third,  other
securities  (including  Warrant  Shares,  Preferred  Stock  Warrant  Shares  and
Preferred  Stock  Warrant  Shares 2, if any,  requested  to be  included in such
registration (in such relative order of priority among such securities as may be
specified with respect thereto).

          4. Except as expressly  amended  hereby,  all of the provisions of the
Stockholders  Agreement are hereby affirmed and shall continue in full force and
effect in accordance with their terms.

          5. This Amendment  shall be governed and construed in accordance  with
the laws of the  state  of  Delaware  applicable  to  agreements  made and to be
performed  entirely  within  such state,  without  regard to the  principles  of
conflicts of laws thereof.

          6. This Amendment may be executed in one or more counterparts, each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.


<PAGE>

          IN WITNESS  WHEREOF,  the undersigned  have executed,  or caused to be
executed, this Agreement as of the date first above written.


                                  KMC TELECOM HOLDINGS, INC.


                                  By:/s/ Michael Sternberg
                                     _______________________________
                                     Name:   Michael A. Sternberg
                                     Title:  President


                                  NASSAU CAPITAL PARTNERS L.P.

                                  By: Nassau Capital L.L.C., its General Partner


                                 By:  /s/ John G. Quigley
                                    _____________________________
                                    Name:  John G. Quigley
                                    Title: Member

                                  NAS PARTNERS I L.L.C.


                                 By:  /s/ John G. Quigley
                                    _____________________________
                                    Name:  John G. Quigley
                                    Title: Member

                                  HAROLD N. KAMINE


                                  /s/ Harold N. Kamine
                                  ___________________________________


                                  NEWCOURT COMMERCIAL FINANCE
                                   CORPORATION


                                  By:/s/ John P. Sirico II
                                     ______________________________
                                     Name:   John P. Sirico II
                                     Title:  Vice President


Signature Page to
Amendment No. 5 to the
Amended and Restated
Stockholders Agreement


<PAGE>

                                  FIRST UNION NATIONAL BANK


                                 By:/s/ Pearce Landry
                                    ____________________________
                                      Name:   Pearce A. Landry
                                      Title:  Vice President

                                  CORESTATES HOLDINGS, INC.


                                 By:/s/ Tracey M. Chaffin
                                    _______________________________
                                      Name:  Tracey M. Chaffin
                                      Title: Manager-Operating

                                  GENERAL ELECTRIC CAPITAL
                                   CORPORATION


                                 By:/s/ M. Mylon
                                    ________________________________
                                      Name:  Mark F. Mylon
                                      Title: Manager-Operating




Signature Page to
Amendment No. 5 to the
Amended and Restated
Stockholders Agreement


<PAGE>

                                  KMC TELECOMMUNICATIONS L.P.


                                  By: /s/ Gerard Russomagno
                                     ______________________________
                                     Name:  Gerard M. Russomagno
                                     Title: General Managing Partner


Signature Page to
Amendment No. 5 to the
Amended and Restated
Stockholders Agreement

                               AMENDMENT NO. 6 TO
                 THE AMENDED AND RESTATED STOCKHOLDERS AGREEMENT

     AMENDMENT  NO.  6 dated  as of June 1,  1999 to the  Amended  and  Restated
Stockholders Agreement, dated as of October 31, 1997 (as heretofore amended, the
"Stockholders  Agreement")  among KMC Telecom  Holdings,  Inc.,  Nassau  Capital
Partners  L.P.,  NAS Partners I L.L.C.,  Harold N. Kamine,  Newcourt  Commercial
Finance Corporation (as successor to AT&T Credit Corporation),  General Electric
Capital Corporation, First Union National Bank (as successor to CoreStates Bank,
N.A.), KMC Telecommunications L.P., and CoreStates Holdings, Inc.

                               W I T N E S S E T H

     WHEREAS,  the  parties  hereto  desire to make  certain  amendments  to the
Stockholders Agreement;

     NOW,  THEREFORE,  in  consideration  of the premises and for other good and
valuable   consideration  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, the parties hereto hereby agree as follows:

          1.  DEFINED  TERMS;  AMENDMENTS  TO  SECTION  1  OF  THE  STOCKHOLDERS
AGREEMENT. Unless otherwise defined herein, all capitalized terms defined in the
Stockholders  Agreement and used herein are so used as so defined.  In addition,
Section 1 of the  Stockholders  Agreement is amended by  replacing  the existing
definitions with those set forth below.

          "PREFERRED STOCK  REGISTRATION  RIGHTS  AGREEMENT" means the Preferred
Stock  Registration  Rights  Agreement  dated as of April 30,  1999  between the
Company and First Union Investors,  Inc., as amended by Amendment No. 1 dated as
of the date  hereof.

          "PREFERRED STOCK WARRANT  AGREEMENT" means the Warrant Agreement dated
as of February 4, 1999 among the Company,  The Chase  Manhattan Bank, as Warrant
Agent,  Newcourt Capital USA, Inc., Lucent  Technologies Inc. and any Additional
Purchasers (as defined therein), as amended by Amendment No. 1 dated as of April
30, 1999, and as further amended by Amendment No. 2 dated as of the date hereof.

          2. AMENDMENTS TO SECTIONS 6.1 OF THE STOCKHOLDERS AGREEMENT.  The last
sentence of paragraph  (g)(ii) of Section 6.1 of the  Stockholders  Agreement is
amended to read as follows:

          6.1 DEMAND REGISTRATIONS.


<PAGE>

          (g) OTHER REGISTRATION RIGHTS.

               (ii)  Notwithstanding  the  foregoing or anything to the contrary
contained in this Agreement,  the Company may grant  registration  rights to the
holders of Series E Preferred Stock and Series F Preferred Stock pursuant to the
Preferred Stock Registration Rights Agreement as provided therein.

          3. Except as expressly  amended  hereby,  all of the provisions of the
Stockholders  Agreement are hereby affirmed and shall continue in full force and
effect in accordance with their terms.

          4. This Amendment  shall be governed and construed in accordance  with
the laws of the  state  of  Delaware  applicable  to  agreements  made and to be
performed  entirely  within  such state,  without  regard to the  principles  of
conflicts of laws thereof.

          5. This Amendment may be executed in one or more counterparts, each of
which  shall be  deemed an  original  and all of which,  taken  together,  shall
constitute one and the same instrument.


<PAGE>


                  IN WITNESS WHEREOF,  the undersigned have executed,  or caused
to be executed, this Agreement as of the date first above written.


                                 KMC TELECOM HOLDINGS, INC.


                                 By:/s/ James D. Greenfell
                                    _______________________________
                                    Name:  James D. Greenfell
                                    Title: Chief Financial Officer

                                 NASSAU CAPITAL PARTNERS L.P.

                                 By:  Nassau Capital L.L.C., its General Partner

                                 By:  /s/ John G. Quigley
                                    _____________________________
                                    Name:  John G. Quigley
                                    Title: Member

                                 NAS PARTNERS I L.L.C.


                                 By:  /s/ John G. Quigley
                                    _____________________________
                                    Name:  John G. Quigley
                                    Title: Member


                                 HAROLD N. KAMINE
                                 in his individual capacity


                                 /s/ Harold N. Kamine
                                 ____________________________________
                                 Harold N. Kamine

                                 NEWCOURT COMMERCIAL FINANCE
                                   CORPORATION


                                 By:/s/ John P. Sirico
                                    ______________________________
                                    Name:   John P. Sirico, II
                                    Title:  Vice President

Signature Page to
Amendment No. 6 to the
Amended and Restated
Stockholders Agreement


<PAGE>

                                 FIRST UNION NATIONAL BANK


                                 By:/s/ Pearce Landry
                                    ____________________________
                                      Name:   Pearce A. Landry
                                      Title:  Vice President

                                 CORESTATES HOLDINGS, INC.


                                 By:/s/ Tracey M. Chaffin
                                    _______________________________
                                      Name:  Tracey M. Chaffin
                                      Title:  Vice President

                                 GENERAL ELECTRIC CAPITAL
                                   CORPORATION


                                 By:/s/ M. Mylon
                                    ________________________________
                                      Name:  Mark F. Mylon
                                      Title: Manager-Operating

                                 KMC TELECOMMUNICATIONS L.P.


                                 By:/s/ Gerard M. Russomagno
                                    ________________________________
                                      Name:  Gerard M. Russomagno
                                      Title: General Managing Partner


Signature Page to
Amendment No. 6 to the
Amended and Restated
Stockholders Agreement

                               AMENDMENT NO. 1 TO
                       1998 STOCK PURCHASE AND OPTION PLAN
                              FOR KEY EMPLOYEES OF
                    KMC TELECOM HOLDINGS, INC. AND AFFILIATES

     This  Amendment  No.  1 to 1998  Stock  Purchase  and  Option  Plan for Key
Employees of KMC Telecom Holdings, Inc. and Affiliates dated as of July 15, 1998
is made as of June 7, 1999 (the "Amendment").

                               W I T N E S S E T H

     WHEREAS,  the Corporation  designed the 1998 Stock Purchase and Option Plan
for Key Employees of the Corporation and Affiliates (the "Plan");

     WHEREAS,  the  Corporation  wishes to increase  the number of shares of the
authorized Common Stock available for Grants under the Plan;

     NOW THEREFORE,  in  consideration  of the premises,  it is hereby agreed as
follows:

     1. DEFINED TERMS.  Unless otherwise  defined herein,  all capitalized terms
defined in the Amendment and used herein are defined in the Plan.

     2.  AMENDMENT TO SECTION 6(A).  Section 6(a) of the Plan is amended to read
in its entirety as follows:

          "The number of Shares  available  for Grants  under this Plan shall be
600,000  shares of the  authorized  Common Stock as of the effective date of the
Plan, subject to adjustment in accordance with Section 8 or 9 hereof. The number
of Shares subject to Grants under this Plan to any one Participant  shall not be
more than 75,000 shares, subject to adjustment in accordance with Section 8 or 9
hereof.  Unless  restricted by applicable law, Shares related to Grants that are
forfeited,  terminated,  cancelled  or expired  unexercised,  shall  immediately
become available for Grants."

     3. Except as expressly  amended  hereby,  all of the provisions of the Plan
are hereby  affirmed and shall  continue in full force and effect in  accordance
with their terms.


<TABLE> <S> <C>

<ARTICLE>                     5
<LEGEND>
     This schedule  contains summary  financial  information  extracted from the
balance sheet of KMC Telecom Holdings,  Inc. as of June 30, 1999 and the related
statement of operations for the six months ended June 30, 1999, and is qualified
in its entirety by reference to such financial statements.
</LEGEND>
<MULTIPLIER>                                1,000

<S>                                    <C>
<PERIOD-TYPE>                                6-mos
<FISCAL-YEAR-END>                      Dec-31-1999
<PERIOD-START>                          Jan-1-1999
<PERIOD-END>                          Jun-30-1999
<CASH>                                 187,992,000
<SECURITIES>                                     0
<RECEIVABLES>                           20,946,000
<ALLOWANCES>                            (1,007,000)
<INVENTORY>                                      0
<CURRENT-ASSETS>                       246,149,000
<PP&E>                                 406,255,000
<DEPRECIATION>                         (19,829,000)
<TOTAL-ASSETS>                         808,752,000
<CURRENT-LIABILITIES>                  146,246,000
<BONDS>                                683,472,000
                  212,268,000
                                      0
<COMMON>                                     6,000
<OTHER-SE>                            (233,240,000)
<TOTAL-LIABILITY-AND-EQUITY>           808,752,000
<SALES>                                          0
<TOTAL-REVENUES>                        26,712,000
<CGS>                                            0
<TOTAL-COSTS>                           44,055,000
<OTHER-EXPENSES>                        58,561,000
<LOSS-PROVISION>                                 0
<INTEREST-EXPENSE>                      26,014,000
<INCOME-PRETAX>                       (103,160,000)
<INCOME-TAX>                                     0
<INCOME-CONTINUING>                   (103,160,000)
<DISCONTINUED>                                   0
<EXTRAORDINARY>                                  0
<CHANGES>                                        0
<NET-INCOME>                          (103,160,000)
<EPS-BASIC>                              (172.31)
<EPS-DILUTED>                                     0


</TABLE>


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