WINSTAR COMMUNICATIONS INC
8-K, 1997-09-11
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

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

                                    FORM 8-K

                                 CURRENT REPORT

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


Date of Report (Date of earliest event reported)                August 8, 1997
                                                                --------------


                           WINSTAR COMMUNICATIONS INC.
               (Exact Name of Registrant as Specified in Charter)



         Delaware                    1-10726                   13-3585278
(State or Other Jurisdiction       (Commission               (IRS Employer
     of Incorporation)             File Number)            Identification No.)




230 Park Avenue, New York, New York                                 10169
(Address of Principal Executive Offices)                          (Zip Code)



Registrant's telephone number, including area code    (212) 645-5000



                                 Not Applicable
          (Former Name or Former Address, if Changed Since Last Report)





                             Exhibit Index -- Page 6

                                Page 1 of 5 Pages


<PAGE>



Item 5.           Other Events.

                  Private Placement of Debt Securities

         On August 8, 1997, WinStar Equipment II Corp. (the "Company"),  a newly
formed wholly owned  subsidiary  of WinStar  Communications,  Inc.  ("WinStar"),
issued an  aggregate  of $50  million of New Senior  Secured  Notes (as  defined
below) in an institutional  private placement (the "August 1997 Debt Placement")
conducted  through  Credit  Suisse First  Boston  Corporation  ("CSFBC")  and BT
Securities  Corporation ("BT"), the initial purchasers of the New Senior Secured
Notes (the "Initial Purchasers"). The August 1997 Debt Placement was consummated
pursuant to a $150 million  facility WinStar had obtained from affiliates of the
Initial Purchasers in March 1997 in conjunction with the issuance by WinStar and
WinStar  Equipment Corp., a wholly owned subsidiary of WinStar ("WEC"),  of $300
million of notes in an institutional  private  placement  conducted  through the
Initial  Purchasers  ("March 1997 Debt  Placement").  WinStar  continues to have
available  $100 million of such facility (the issuance of the New Senior Secured
Notes  reducing  availability  by  $50  million),   which,  subject  to  WinStar
satisfying various operating and financial criteria,  may be drawn by WinStar on
March 31, 1999. The amount of this  commitment may be further reduced in certain
circumstances, including as a result of the issuance of additional securities by
WinStar prior to March 31, 1999.

         The  August  1997  Debt  Placement  consisted  of  $50  million  of the
Company's  12 1/2%  Senior  Secured  Notes  due 2004 (the  "New  Senior  Secured
Notes"),  unconditionally  guaranteed  on  a  senior  basis  by  WinStar  ("Note
Guarantee").  The Note Guarantee is an unsecured,  senior obligation of WinStar,
ranking  pari  passu in right of payment  with all  existing  and future  senior
indebtedness of WinStar,  and will be senior in right of payment to all existing
and future  subordinated  indebtedness of WinStar.  The New Senior Secured Notes
will be secured by liens on Designated  Equipment (as defined  below)  purchased
with proceeds of the August 1997 Debt Placement.

         Interest  on the New Senior  Secured  Notes will accrue at a rate of 12
1/2% per annum and be payable  semiannually on March 15 and September 15 of each
year, commencing September 15, 1997. The New Senior Secured Notes will mature on
March 15,  2004 and are  redeemable  on or after March 15, 2002 at the option of
the Company.

         The  proceeds  of the  New  Senior  Secured  Notes  will be used by the
Company to acquire telecommunications equipment,  inventory and related software
and  other  property  ("Designated  Equipment"),   including  radios,  antennae,
switches,  cable,  service vehicles and related equipment and software,  used in
WinStar's business and for the buildout of its telecommunications operations for
lease to WinStar's  operating  subsidiaries and others and to pay certain costs,
including installation costs, related thereto ("Acquisition Costs").

         The New Senior Secured Notes were issued  pursuant to, and are governed
by, the terms of an indenture (the "Indenture") among the Company,  as issuer of
the New Senior Secured  Notes,  WinStar,  as guarantor,  and United States Trust
Company of New York ("Trustee"),  as trustee.  Under the Indenture,  the Company
and  WinStar  are  subject  to   restrictions   substantially   similar  to  the
restrictions  on WinStar  contained  in an  indenture  between  WinStar  and the
Trustee with respect to certain  notes issued in October 1995 (the "1995 Notes")
and indentures among WinStar,  WEC and the Trustee with respect to certain notes
issued in the March  1997  Debt  Placement.  Such  restrictions  include,  among
others,  restrictions with respect to the incurrence of additional indebtedness,
the  creation  of  liens or  encumbrances,  the  making  of  certain  restricted
payments, including investments outside WinStar's telecommunications operations,
and sales of assets,  in each case, of WinStar and certain of its  subsidiaries,
and changes of control of WinStar.

         Upon  consummation of the August 1997 Debt  Placement,  the Company and
WinStar entered into a Registration  Rights Agreement (the "Registration  Rights
Agreement") with the Initial Purchasers,  which requires the Company and WinStar
to effect a registered exchange offer pursuant to which the

                                        2

<PAGE>



New Senior Secured Notes may be exchanged by the holders  thereof for notes (the
"Exchange  Notes")  having terms  substantially  identical to such exchanged New
Senior Secured Notes (except with respect to transfer restrictions). Each of the
Company  and  WinStar  has agreed to its best  efforts to have the  registration
statement in connection  with such  exchange  offer filed by September 22, 1997,
declared effective by the Securities and Exchange  Commission ("SEC") by January
5, 1998 and to keep the exchange offer open for not less than 30 days (or longer
if required by applicable  law) after the date that notice  thereof is mailed to
the holders of the New Senior Secured Notes. Each of the Company and WinStar has
further agreed,  under certain  circumstances,  including,  among others,  their
failure to consummate  such exchange  offer by February 4, 1998, to file a shelf
registration  statement (a "Shelf Registration  Statement")  covering resales of
the New  Senior  Secured  Notes,  and to keep the Shelf  Registration  Statement
effective  until the time when the New Senior Secured Notes covered  thereby can
be sold without an effective registration  statement.  In the event of a default
by the Company or WinStar under the Registration Rights Agreement, interest will
accrue on the New Senior  Secured Notes from and including the date on which any
such default  shall occur,  but  excluding  the date on which all defaults  with
respect  to such New  Senior  Secured  Notes have been  cured.  Such  additional
interest will be payable in cash,  semiannually in arrears,  at a rate per annum
equal to .50% of the principal amount of the New Senior Secured Notes.

         Except as otherwise described in the Indenture,  the New Senior Secured
Notes are not  redeemable  prior to March 15, 2002.  Thereafter,  the New Senior
Secured Notes will be redeemable,  at the Company's option, in whole or in part,
at the following  redemption  prices (expressed as a percentage of the principal
amount of the New  Senior  Notes at the time of  redemption)  plus  accrued  and
unpaid interest, if any:



                                                      Redemption
              Year                                      Price
              2002                                     106.250%
              2003 and thereafter                      103.125%

         In the event that by August 8, 1999, the Company shall not have applied
at least $50.0 million to fund the  Acquisition  Costs of  Designated  Equipment
($50.0  million  less the  amount so applied  being  herein  called the  "Unused
Equipment Amount"),  the Company shall redeem the New Senior Secured Notes in an
aggregate  principal amount equal to the Unused Equipment Amount at a redemption
price of 112.50% of such principal amount, plus, in each case accrued and unpaid
interest (if any) to the date of such redemption price. The mandatory redemption
described herein shall occur no later than August 23, 1999.

Item 7.      Financial Statements, Pro Forma Financial Information and Exhibits.

                  Financial Statements.

         None.

                  Pro Forma Financial Information.

         None.


                                        3

<PAGE>



                  Exhibits.
<TABLE>
<CAPTION>
<S>                             <C>   
   10.1                       Purchase Agreement between WinStar, the Company and the Initial
                                    Purchasers, dated August 8, 1997

   10.2                       Form of 12 1/2% Senior Secured Note due 2004

   10.3                       Guaranteed Senior Secured Notes Indenture, including form of
                                    Guaranteed Senior Secured Note, dated as of August 1, 1997

   10.4                       Registration Rights Agreement, dated August 8, 1997

   10.5                       Security Agreement, dated August 1, 1997
</TABLE>

                                        4

<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 hereunto duly authorized.


Dated: September 11, 1997                          WINSTAR COMMUNICATIONS, INC.
                                                  ----------------------------
                                                  (Registrant)


                                                    /s/Timothy R. Graham
                                                  ----------------------------
                                                   Timothy R. Graham,
                                                   Executive Vice President


                                        5

<PAGE>


                                  EXHIBIT INDEX
<TABLE>
<CAPTION>


Exhibit Number                      Description
<S>                                   <C>  
         10.1                       Purchase Agreement between WinStar, the Company and the Initial
                                    Purchasers, dated August 8, 1997

         10.2                       Form of 12 1/2% Senior Secured Note due 2004

         10.3                       Guaranteed Senior Secured Notes Indenture, including form of
                                    Guaranteed Senior Secured Note, dated as of August 1, 1997

         10.4                       Registration Rights Agreement, dated August 8, 1997

         10.5                       Security Agreement, dated August 1, 1997

</TABLE>

                                        6

<PAGE>

                                                                                

                                                               EXECUTION COPY



                                   $50,000,000

                           WINSTAR EQUIPMENT II CORP.

          $50,000,000 12 1/2% Guaranteed Senior Secured Notes Due 2004


                               PURCHASE AGREEMENT


                                                                August 8, 1997


CREDIT SUISSE FIRST BOSTON CORPORATION
BT SECURITIES CORPORATION
   c/o Credit Suisse First Boston Corporation,
   Eleven Madison Avenue
   New York, N.Y. 10010


Ladies and Gentlemen:

     1.  Introductory.  WinStar Equipment II Corp., a Delaware  corporation (the
"Issuer"),  has agreed,  subject to the terms and conditions  stated herein,  to
issue and sell to the several initial purchasers named in Schedule A hereto (the
"Purchasers")   U.S.$50,000,000   principal  amount  of  the  Issuer's  12  1/2%
Guaranteed Senior Secured Notes Due 2004 (the "Offered Securities"). The Offered
Securities   will  be   unconditionally   guaranteed  on  a  senior  basis  (the
"Guarantee")  by  WinStar  Communications,  Inc.,  a Delaware  corporation  (the
"Guarantor").  The Offered Securities are being issued under an indenture, dated
as of August 1, 1997 (the "Indenture"),  between the Issuer, the Guarantor,  and
United  States  Trust  Company  of New  York,  as  Trustee.  The  United  States
Securities Act of 1933 is herein referred to as the "Securities Act."

         As  provided  in  Section  5(a) of this  Agreement,  the Issuer and the
Guarantor  have  agreed to prepare  and  deliver to the  Purchasers  an offering
circular  relating to the Offered  Securities  being purchased by the Purchasers
for  use  by the  Purchasers  in  connection  with  the  resale  of the  Offered
Securities.  Such  offering  circular  is herein  referred  to as the  "Offering
Document".


<PAGE>


                                                                            2

     The Issuer and the  Guarantor  hereby agree with the several  Purchasers as
follows:

     2.  Representations  and  Warranties of the Issuer and the  Guarantor.  The
Issuer and the Guarantor  represent and warrant to, and agree with,  the several
Purchasers that:

     (a) As of its date,  the  Offering  Document  will not  include  any untrue
statement  of a material  fact or omit to state any material  fact  necessary in
order to make the statements  therein,  in the light of the circumstances  under
which they were made, not misleading.  The preceding  sentence does not apply to
statements  in or  omissions  from the  Offering  Document  based  upon  written
information furnished to the Issuer by any Purchaser through Credit Suisse First
Boston  Corporation  ("CSFBC")  specifically  for use therein.  The  Guarantor's
Annual Report on Form 10-K most recently  filed with the Securities and Exchange
Commission (the  "Commission")  and all subsequent  reports  (collectively,  the
"Exchange  Act  Reports")  which  have  been  filed  by the  Guarantor  with the
Commission or sent to  stockholders  pursuant to the Securities  Exchange Act of
1934 (the "Exchange Act"),  when they were filed with the Commission,  conformed
in all material  respects to the  requirements of the Exchange Act and the rules
and  regulations  of the  Commission  thereunder.  Each of (i) the  registration
statement on Form S-4 under the  Securities  Act  (Registration  No. 333- 26367)
filed by the Issuer and the  Guarantor  on May 2, 1997,  as amended  pursuant to
Amendment  No. 1 on July 22, 1997,  and Amendment No. 2 on August 5, 1997 (as so
amended, the "S-4 Registration  Statement") and (ii) the registration  statement
on Form S-3 under the Securities Act  (Registration  No. 333-18465) filed by the
Guarantor on December 20, 1996,  as amended  pursuant to Amendment No. 1 on June
10,  1997,  and  Amendment  No. 2 on  August 5,  1997 (as so  amended,  the "S-3
Registration  Statement" and,  together with the S-4 Registration  Statement and
the Exchange Act Reports, the "SEC Filings"), as of the date hereof, conforms in
all material  respects to the  requirements  of the Securities Act and the rules
and  regulations of the  Commission  thereunder,  and neither such  registration
statement (as amended) includes any untrue statement of a material fact or omits
to state any material  fact  required to be stated  therein or necessary to make
the statements  therein not misleading (except that neither the S-4 Registration
Statement nor the S-3 Registration  Statement includes the Guarantor's quarterly
financial  information  for the period  ended June 30,  1997,  and neither  such
registration statement includes a description of the Offered Securities).

     (b) Each of the Issuer and the Guarantor has been duly  incorporated and is
an  existing  corporation  in good  standing  under  the  laws of the  State  of
Delaware,  with corporate  power and authority to own its properties and conduct
its business as described in the March Offering  Document (as defined in Section
5(a)) or the SEC  Filings;  and each of the  Issuer  and the  Guarantor  is duly
qualified to do business as a



<PAGE>


                                                                            3

foreign  corporation  in good standing in all other  jurisdictions  in which its
ownership  or lease of  property or the conduct of its  business  requires  such
qualification, except to the extent that the failure to be so qualified or be in
good  standing  would  not  have a  material  adverse  effect  on the  condition
(financial or other),  business,  properties or results of operations of each of
the Issuer and the Guarantor and their respective subsidiaries, taken as a whole
(a "Material  Adverse  Effect").  The Guarantor is qualified to do business as a
foreign  corporation  in the State of New York.  The Issuer is  qualified  to do
business as a foreign corporation in the State of New York.

     (c)  Each  subsidiary  of the  Issuer  and  the  Guarantor  has  been  duly
incorporated  and is an existing  corporation in good standing under the laws of
the jurisdiction of its incorporation, with corporate power and authority to own
its  properties  and conduct its  business as  described  in the March  Offering
Document or the SEC Filings; and each subsidiary of the Issuer and the Guarantor
is duly  qualified to do business as a foreign  corporation  in good standing in
all other  jurisdictions  in which its  ownership  or lease of  property  or the
conduct of its business requires such  qualification,  except to the extent that
the failure to be so qualified or be in good standing  would not have a Material
Adverse  Effect;  all of the  issued  and  outstanding  capital  stock  of  each
subsidiary of the Issuer and the Guarantor has been duly  authorized and validly
issued  and is  fully  paid and  nonassessable;  and the  capital  stock of each
subsidiary  owned  by  the  Issuer  and  the  Guarantor,   directly  or  through
subsidiaries, is owned free from liens, encumbrances and defects.

     (d) Each of the Indenture and the Registration Rights Agreement (as defined
herein) has been duly authorized, executed and delivered; the Offered Securities
have been duly  authorized;  and when the Offered  Securities  are delivered and
paid for pursuant to this Agreement on the Closing Date (as defined below), such
Offered  Securities  will have been duly  executed,  authenticated,  issued  and
delivered;  and the Indenture and the Registration Rights Agreement  constitute,
and  such  Offered  Securities  will  constitute,   valid  and  legally  binding
obligations of the Issuer,  enforceable in accordance with their terms,  subject
to bankruptcy, insolvency, fraudulent transfer,  reorganization,  moratorium and
similar laws of general applicability relating to or affecting creditors' rights
and to general equity principles;  and, with respect to the Registration  Rights
Agreement,  except that rights to indemnity and  contribution  may be limited by
federal and state securities laws and public policy considerations.

     (e) Except as  contemplated  by this Agreement or as disclosed in the March
Offering  Document or the SEC Filings,  there are no  contracts,  agreements  or
understandings  between  the Issuer or the  Guarantor  and any person that would
give rise to a valid claim  against the Issuer or the Guarantor or any Purchaser
for a brokerage  commission,  finder's fee or other like  payment in  connection
with the transactions contemplated by this Agreement.



<PAGE>


                                                                             4


     (f) No consent, approval,  authorization,  or order of, or filing with, any
governmental agency or body or any court is required for the consummation of the
transactions  contemplated by this Agreement in connection with the issuance and
sale of the Offered  Securities  by the Issuer or the giving of the Guarantee by
the  Guarantor,  other than as may be required  under the Securities Act and the
Rules  and  Regulations  of  the  Commission  thereunder  with  respect  to  the
Registration Rights Agreement among the Issuer or the giving of the Guarantee by
the Guarantor and the Purchasers dated the date hereof (the "Registration Rights
Agreement") and the  transactions  contemplated  thereunder,  and such as may be
required by  securities or blue sky laws of any state of the United States or of
any foreign  jurisdiction  in connection  with the offer and sale of the Offered
Securities.

     (g)  The  execution,   delivery  and  performance  of  the  Indenture,  the
Registration  Rights Agreement and this Agreement,  and the issuance and sale of
the Offered Securities and compliance with the terms and provisions thereof will
not result in a breach or  violation of any of the terms and  provisions  of, or
constitute a default under,  (i) any statute,  rule,  regulation or order of any
governmental  agency  or  body  or  any  court,  domestic  or  foreign,   having
jurisdiction  over the Issuer,  the Guarantor or any subsidiary of the Issuer or
the  Guarantor or any of their  properties,  (ii) any agreement or instrument to
which the Issuer,  the  Guarantor or any such  subsidiary is a party or by which
the Issuer, the Guarantor or any such subsidiary is bound or to which any of the
properties of the Issuer,  the Guarantor or any such  subsidiary is subject,  or
(iii)  the  charter  or  by-laws  of the  Issuer,  the  Guarantor  or  any  such
subsidiary, except, in the case of clause (i) or (ii), such breaches, violations
or defaults  that  individually  or in the  aggregate  would not have a Material
Adverse  Effect;  and the  Issuer  has full  corporate  power and  authority  to
authorize,  issue and sell the  Offered  Securities  to be sold by the Issuer as
contemplated by this Agreement.

     (h) This Agreement has been duly authorized,  executed and delivered by the
Issuer and the Guarantor.

     (i) Except as disclosed in the March Offering  Document or the SEC Filings,
the Issuer,  the Guarantor and their subsidiaries have good and marketable title
to all real  properties  and all other  properties  and assets owned by them, in
each case free from liens, encumbrances and defects that would materially affect
the  value  thereof  or  materially  interfere  with  the use made or to be made
thereof by them; and except as disclosed in the March  Offering  Document or the
SEC Filings,  the Issuer,  the Guarantor and their  subsidiaries hold any leased
real or personal property under valid and enforceable  leases with no exceptions
that would materially interfere with the use made or to be made thereof by them.




<PAGE>


                                                                             5

     (j) The Issuer,  the  Guarantor  and their  subsidiaries  possess  adequate
certificates, authorities or permits issued by appropriate governmental agencies
or bodies  necessary  to conduct the  business now operated by them and have not
received any notice of proceedings relating to the revocation or modification of
any  such  certificate,  authority  or  permit  that,  individually  or  in  the
aggregate, could reasonably be expected to have a Material Adverse Effect.

     (k) No labor dispute with the employees of the Issuer, the Guarantor or any
of  their  subsidiaries  exists  or,  to  the  knowledge  of the  Issuer  or the
Guarantor,  is  imminent  that could  reasonably  be expected to have a Material
Adverse Effect.

     (l) The Issuer,  the Guarantor and their  subsidiaries  own, possess or can
acquire on reasonable terms,  adequate trademarks,  trade names and other rights
to inventions, know-how, patents, copyrights, confidential information and other
intellectual property  (collectively,  "intellectual property rights") necessary
to conduct the business as now  operated by them,  or used in the conduct of the
business as now  operated by them,  except to the extent that the failure to own
or possess or the inability to acquire such  intellectual  property rights would
not  individually or in the aggregate have a Material  Adverse  Effect;  and the
Issuer and the  Guarantor  have not  received any notice of  infringement  of or
conflict  with  asserted  rights  of others  with  respect  to any  intellectual
property  rights that, if determined  adversely to the Issuer,  the Guarantor or
any  of  their  subsidiaries,  would  individually  or in the  aggregate  have a
Material Adverse Effect.

     (m) Except as disclosed in the March Offering  Document or the SEC Filings,
neither the Issuer,  the Guarantor nor any of their subsidiaries is in violation
of any statute, rule,  regulation,  decision or order of any governmental agency
or body or any court,  domestic  or foreign,  relating  to the use,  disposal or
release of  hazardous  or toxic  substances  or  relating to the  protection  or
restoration  of  the  environment  or  human  exposure  to  hazardous  or  toxic
substances  (collectively,  "environmental  laws"),  owns or  operates  any real
property  contaminated  with any substance that is subject to any  environmental
laws,  is liable for any  off-site  disposal  or  contamination  pursuant to any
environmental  laws,  or is subject to any claim  relating to any  environmental
laws, which violation,  contamination,  liability or claim would individually or
in the  aggregate  have a  Material  Adverse  Effect;  and  the  Issuer  and the
Guarantor are not aware of any pending  investigation which might lead to such a
claim.

     (n) Except as disclosed in the March Offering  Document or the SEC Filings,
there are no pending  actions,  suits or  proceedings  against or affecting  the
Issuer,  the Guarantor,  any of their  subsidiaries  or any of their  respective
properties that, individually or in the aggregate,  could reasonably be expected
to have a Material  Adverse  Effect,  or to materially and adversely  affect the
ability of either of the Issuer or the  Guarantor  to  perform  its  obligations
under the Indenture, the Registration Rights



<PAGE>


                                                                             6

Agreement or this Agreement,  or which are otherwise  material in the context of
the  sale  of  the  Offered  Securities;  and to the  Issuers'  and  Guarantor's
knowledge, no such actions, suits or proceedings are threatened or contemplated.

     (o) The financial  statements  included or incorporated by reference in the
S-3  Registration  Statement  present  fairly  the  financial  position  of  the
Guarantor  and its  consolidated  subsidiaries  as of the dates  shown and their
results of operations and cash flows for the periods  shown,  and such financial
statements have been prepared in conformity with generally  accepted  accounting
principles  in  the  United  States  applied  on a  consistent  basis;  and  the
assumptions  used in preparing the pro forma  financial  statements  included or
incorporated by reference in the S-3 Registration Statement provide a reasonable
basis for  presenting  the  significant  effects  directly  attributable  to the
transactions or events described therein, the related pro forma adjustments give
appropriate  effect  to those  assumptions,  and the pro forma  columns  therein
reflect  the  proper  application  of  those  adjustments  to the  corresponding
historical  financial statement amounts.  The financial statement data set forth
in the Company's press release dated August 5, 1997 (the "Release"),  accurately
reflect in all material  respects the Company's results purported to be shown in
such press release.

     (p) Except as disclosed in the March  Offering  Document or the SEC Filings
or the  Release,  since  the date of the  latest  audited  financial  statements
included in the S-3 Registration  Statement,  there has been no material adverse
change,  nor any development or event involving a prospective  material  adverse
change, in the condition (financial or other),  business,  properties or results
of  operations  of either of the Issuer or the  Guarantor  and their  respective
subsidiaries  taken  as a  whole  (it  being  understood  that a  change  in the
Guarantor's  stock price or the continuation of operating losses consistent with
the Guarantor's  historical results shall be deemed not to be, in and of itself,
such a material adverse change),  and, except as disclosed in or contemplated by
the March  Offering  Document or the SEC Filings,  there has been no dividend or
distribution  of any kind declared,  paid or made by the Issuer or the Guarantor
on any class of their capital stock.

     (q)  Neither  of the  Issuer or the  Guarantor  is an  open-end  investment
company, unit investment trust or face-amount  certificate company that is or is
required  to be  registered  under  Section 8 of the  United  States  Investment
Company Act of 1940 (the  "Investment  Company  Act"),  nor are either of them a
closed-end  investment  company  required to be registered,  but not registered,
thereunder;  and neither of the Issuer or the  Guarantor  is and,  after  giving
effect to the offering and sale of the Offered Securities and the application of
the  proceeds  thereof,  will  be an  "investment  company"  as  defined  in the
Investment Company Act.




<PAGE>


                                                                             7

     (r) No securities of the same class (within the meaning of Rule  144A(d)(3)
under the Securities  Act) as the Offered  Securities are listed on any national
securities  exchange registered under Section 6 of the Exchange Act or quoted in
a U.S. automated inter-dealer quotation system.

     (s) The offer and sale of the Offered Securities in the manner contemplated
by this  Agreement  will be exempt  from the  registration  requirements  of the
Securities  Act;  and it is not  necessary to qualify an indenture in respect of
the Offered  Securities  under the United States Trust Indenture Act of 1939, as
amended (the "Trust Indenture Act"),  other than in connection with the Issuer's
and the Guarantor's obligations under the Registration Rights Agreement.

     (t) Neither the Issuer, the Guarantor, nor any of their affiliates, nor any
person acting on its or their behalf (i) has, within the six-month  period prior
to the date hereof,  offered or sold in the United States or to any U.S.  person
(as such terms are defined in Regulation S under the Securities Act) the Offered
Securities or any security of the same class or series as the Offered Securities
or (ii) has  offered or will  offer or sell the  Offered  Securities  (A) in the
United  States  by  means  of  any  form  of  general  solicitation  or  general
advertising  within the meaning of Rule 502(c) under the  Securities  Act or (B)
with respect to any such securities sold in reliance on Rule 903 of Regulation S
("Regulation  S") under the  Securities  Act, by means of any  directed  selling
efforts  within the meaning of Rule  902(b) of  Regulation  S. The  Issuer,  the
Guarantor,  their affiliates and any person acting on their behalf have complied
and will comply with the offering restrictions  requirement of Regulation S. The
Issuer  and the  Guarantor  have  not  entered  and  will  not  enter  into  any
contractual  arrangement  with  respect  to  the  distribution  of  the  Offered
Securities except for this Agreement.

     (u) The Guarantor is subject to Section 13 or 15(d) of the Exchange Act.

     (v) The use of the  proceeds by the Issuer from the offering of the Offered
Securities,  as  contemplated  by Section 4.21 of the  Indenture  governing  the
Offered Securities, is specifically permitted by the indentures each dated as of
October 23, 1995,  between the  Guarantor and the United States Trust Company of
New York,  as trustee,  in respect of the  Guarantor's  $150,000,577  14% Senior
Discount Notes due 2005 and  $75,000,289  14%  Convertible  Senior  Subordinated
Discount Notes due 2005 (together, the "Old Indentures").

     (w) The Issuer,  the Guarantor and their  subsidiaries are in compliance in
all material  respects  with the  Communications  Act of 1934, as amended by the
Telecommunications   Act  of  1996  (the  "Communications  Act")  and  with  all
applicable  rules,  regulations  and  policies  of  the  Federal  Communications
Commission (the "FCC").




<PAGE>


                                                                             8

     (x) The Issuer and the Guarantor have provided to the Purchasers a complete
and accurate list of all licenses granted to the Issuer, the Guarantor and their
subsidiaries (other than experimental  licenses in the 31 GHz and 38 GHz portion
of the radio spectrum and licenses acquired from Local Area  Telecommunications,
Inc.  that are not in the 38 GHz portion of the radio  spectrum) by the FCC (the
"Licenses").  All of the  Licenses  are  currently  valid and in full  force and
effect.  Neither of the Issuer and the Guarantor  nor any of their  subsidiaries
have  any  knowledge  of  any  investigation,   notice  of  apparent  liability,
violation,  forfeiture or other order or complaint issued by or before any court
or regulatory body,  including the FCC, or of any other proceedings  (other than
proceedings relating to the wireless communications  industries generally) which
could in any manner  materially  threaten or  adversely  affect the  validity or
continued effectiveness of any of the Licenses.

     (y) No event has occurred which (i) results in, or after notice or lapse of
time or both would  result in,  revocation,  suspension,  adverse  modification,
non-renewal,  impairment,  restriction or termination of, or order of forfeiture
with respect to, any License or (ii)  materially and adversely  affects or could
reasonably be expected in the future to materially  adversely  affect any of the
rights of the Issuer, the Guarantor or any of their subsidiaries thereunder.

     (z) The Issuer,  the Guarantor and their  subsidiaries have duly filed in a
timely  manner  all  material   filings,   reports,   applications,   documents,
instruments   and   information   required   to  be  filed  by  them  under  the
Communications  Act, and all such filings are true,  correct and complete in all
material respects.

         (aa)  Neither  of the  Issuer  and  the  Guarantor  nor  any  of  their
subsidiaries  have any reason to believe  that any of the  Licenses  will not be
renewed in the ordinary course.

         3.  Purchase,  Sale and  Delivery  of  Offered  Securities;  Payment of
Underwriting  Discount.  On the  basis of the  representations,  warranties  and
agreements herein contained,  but subject to the terms and conditions herein set
forth,  the Issuer hereby agrees to sell to the  Purchasers,  and the Purchasers
hereby  agree,  severally  and not  jointly,  to purchase  from the Issuer,  the
respective  principal amounts of Offered Securities set forth opposite the names
of the  Purchasers  in  Schedule A hereto,  at an  aggregate  purchase  price of
$50,000,000.

         The Issuer  hereby  agrees to deliver  against  payment of the purchase
price  the  Offered  Securities  in the  form  of one or more  permanent  global
securities  in  definitive  form (the "Global  Securities")  deposited  with the
Trustee as custodian for The Depository  Trust Company ("DTC") and registered in
the name of Cede & Co., as nominee for DTC.  Interests in any  permanent  Global
Securities will be held only in



<PAGE>


                                                                             9

book-entry  form  through  DTC,  except  in  limited  circumstances  (which  are
described in the March Offering  Document).  Payment for the Offered  Securities
shall be made by the  Purchasers in Federal (same day) funds by wire transfer to
an account previously  designated to CSFBC by the Guarantor at a bank acceptable
to CSFBC, at the office of Cravath,  Swaine & Moore, Worldwide Plaza, 825 Eighth
Avenue,  New York,  N.Y.  10019-7475 at 10:00 A.M. (New York time),  on the date
hereof (the "Closing  Date"),  against  delivery to the Trustee as custodian for
DTC of the Global  Securities  representing  all of the Offered  Securities.  As
payment of an  underwriting  discount  in  connection  with such  purchase,  the
Guarantor hereby agrees to pay to the Purchasers, in Federal (same day) funds by
wire  transfer to an account  previously  designated  to the Guarantor by CSFBC,
$1,518,524.38,  such  payment  to be  made  concurrently  with  the  Purchasers'
purchase of the Offered Securities.

         4.  Representations and Agreements by Purchasers; Resale by Purchasers.

     (a) Each Purchaser severally  represents and warrants to the Issuer and the
Guarantor that it is an "accredited investor" within the meaning of Regulation D
under the Securities Act.

     (b) Each Purchaser severally  acknowledges that the Offered Securities have
not been  registered  under the  Securities  Act and may not be  offered or sold
within the United  States or to, or for the account or benefit of, U.S.  persons
except in  accordance  with  Regulation S or pursuant to an  exemption  from the
registration  requirements  of the  Securities  Act.  Each  Purchaser  severally
represents and agrees that it has offered and sold the Offered  Securities,  and
will offer and sell the Offered  Securities (i) as part of its  distribution  at
any time and (ii) otherwise until 40 days after the later of the commencement of
the offering and the Closing Date, only in accordance with Rule 903 or Rule 144A
under the Securities Act ("Rule 144A"). Accordingly,  neither such Purchaser nor
its affiliates,  nor any persons acting on its or their behalf,  have engaged or
will  engage  in any  directed  selling  efforts  with  respect  to the  Offered
Securities,  and such Purchaser, its affiliates and all persons acting on its or
their  behalf  have  complied  and will comply  with the  offering  restrictions
requirement of Regulation S. Each Purchaser  severally  agrees that, at or prior
to confirmation of sale of the Offered Securities, other than a sale pursuant to
Rule 144A, such Purchaser will have sent to each  distributor,  dealer or person
receiving a selling  concession,  fee or other  remuneration  that purchases the
Offered Securities from it during the restricted period a confirmation or notice
to substantially the following effect:

          "The Securities covered hereby have not been registered under the U.S.
          Securities Act of 1933 (the  "Securities  Act") and may not be offered
          or sold within the United  States or to, or for the account or benefit
          of, U.S. persons (i) as part of their distribution at any time or (ii)
          otherwise until 40 days after

<PAGE>


                                                                            10

          the  later of the date of the  commencement  of the  offering  and the
          closing date,  except in either case in accordance  with  Regulation S
          (or Rule 144A if available) under the Securities Act."

Unless  otherwise  defined  herein,  terms used in this  subsection (b) have the
meanings given to them by Regulation S.

     (c) Each Purchaser  severally agrees that it and each of its affiliates has
not entered and will not enter into any contractual  arrangement with respect to
the distribution of the Offered Securities except for any such arrangements with
the other  Purchasers or  affiliates  of the other  Purchasers or with the prior
written consent of the Issuer and the Guarantor.

     (d) Each Purchaser severally agrees that it and each of its affiliates will
not offer or sell the Offered  Securities  in the United  States by means of any
form of general  solicitation or general  advertising within the meaning of Rule
502(c)  under  the  Securities  Act,  including,  but  not  limited  to (i)  any
advertisement,   article,   notice  or  other  communication  published  in  any
newspaper,  magazine or similar media or broadcast over  television or radio, or
(ii) any seminar or meeting  whose  attendees  have been  invited by any general
solicitation  or general  advertising.  Each Purchaser  severally  agrees,  with
respect  to  resales  made  in  reliance  on  Rule  144A  of any of the  Offered
Securities,  to deliver either with the confirmation of such resale or otherwise
prior to  settlement  of such  resale a notice to the effect  that the resale of
such Offered  Securities  has been made in reliance upon the exemption  from the
registration requirements of the Securities Act provided by Rule 144A.

     (e) Each of the Purchasers  severally represents and agrees that (i) it has
not offered or sold and prior to the date six months  after the date of issue of
the Offered  Securities will not offer or sell any Offered Securities to persons
in the United Kingdom except to persons whose ordinary  activities  involve them
in acquiring,  holding,  managing or disposing of  investments  (as principal or
agent) for the purposes of their businesses or otherwise in circumstances  which
have not  resulted  and will not  result in an offer to the public in the United
Kingdom within the meaning of the Public Offers of Securities  Regulations 1995;
(ii) it has  complied  and will comply  with all  applicable  provisions  of the
Financial  Services Act 1986 with respect to anything  done by it in relation to
the Offered Securities in, from or otherwise  involving the United Kingdom;  and
(iii) it has only  issued or  passed  on and will  only  issue or pass on in the
United Kingdom any document  received by it in connection  with the issue of the
Offered  Securities  to a person who is of a kind  described in Article 11(3) of
the Financial Services Act 1986 (Investment  Advertisements)  (Exemptions) Order
1996 or is a person to whom such  document may  otherwise  lawfully be issued or
passed on.




<PAGE>


                                                                            11

     (f) Each  Purchaser  agrees that promptly  following the  completion of its
initial  resale  of all the  Offered  Securities  purchased  by  such  Purchaser
pursuant  to this  Agreement,  it will  notify the Issuer and the  Guarantor  in
writing thereof.

     5. Certain  Agreements of the Issuer and the Guarantor.  The Issuer and the
Guarantor agree with the several Purchasers that:

     (a)  The  Issuer  and  the  Guarantor  will  prepare  and  deliver  to  the
Purchasers,  as soon as  reasonably  practicable  after  the  date  hereof,  the
Offering  Document,  which  shall  be in a  form  substantially  similar  to the
Confidential  Offering  Circular  dated  March 13,  1997 of the  Issuer  and the
Guarantor (the "March Offering Document"), with such changes as are necessary so
that such document does not include  material  misstatements  or omissions.  The
Issuer and the Guarantor  will advise CSFBC promptly of any proposal to amend or
supplement  the  Offering  Document  and  will  not  effect  such  amendment  or
supplementation without CSFBC's consent (which consent shall not be unreasonably
withheld).  If, at any time prior to the completion of the resale of the Offered
Securities by the Purchasers, any event occurs as a result of which the Offering
Document as then amended or supplemented  would include an untrue statement of a
material fact or omit to state any material fact  necessary in order to make the
statements  therein,  in the light of the  circumstances  under  which they were
made,  not  misleading,  or if it is  necessary  at any  such  time to  amend or
supplement the Offering  Document to comply with any applicable  law, the Issuer
and the  Guarantor  promptly  will notify CSFBC of such event and promptly  will
prepare,  at their own expense,  an amendment or  supplement  which will correct
such statement or omission or effect such  compliance.  Neither  CSFBC's consent
to, nor the Purchasers' delivery to offerees or investors of, any such amendment
or supplement  shall  constitute a waiver of any of the  conditions set forth in
Section 6.

     (b) The  Issuer  and the  Guarantor  will  furnish  to CSFBC  copies of the
Offering  Document and all amendments and supplements to such document,  in each
case as soon as available and in such quantities as CSFBC  reasonably  requests,
and the  Issuer and the  Guarantor  will  furnish to CSFBC as soon as  available
three copies of the Offering  Document  signed by a duly  authorized  officer of
each of the Issuer and the Guarantor,  one of which will include the independent
accountants' reports therein manually signed by such independent accountants. At
any time when either of the Issuer or the Guarantor is not subject to Section 13
or 15(d) of the Exchange Act, such Issuer or Guarantor, as the case may be, will
promptly  furnish or cause to be furnished to CSFBC (and, upon request,  to each
of the other Purchasers) and, upon request of holders and prospective purchasers
of the  Offered  Securities,  to such  holders  and  purchasers,  copies  of the
information  required to be delivered to holders and  prospective  purchasers of
the Offered Securities  pursuant to Rule 144A(d)(4) under the Securities Act (or
any successor provision thereto) in order to permit compliance with

<PAGE>


                                                                            12

Rule 144A in connection with resales by such holders of the Offered  Securities.
The  Guarantor  will  pay the  expenses  of  printing  and  distributing  to the
Purchasers all such documents.

     (c) The Issuer and the Guarantor will use their best efforts to arrange for
the  qualification of the Offered  Securities for sale and the  determination of
their  eligibility for investment  under the laws of such  jurisdictions  in the
United States and Canada as CSFBC  reasonably  designates and will continue such
qualifications  in  effect so long as  required  for the  resale of the  Offered
Securities  by the  Purchasers;  provided,  however,  that  the  Issuer  and the
Guarantor will not be required to qualify as foreign  corporations  or to file a
general consent to service of process in any such state.

     (d) During the period of five years after the Closing Date,  the Issuer and
the  Guarantor  will furnish to CSFBC and,  upon  request,  to each of the other
Purchasers,  as soon as practicable after the end of each fiscal year, a copy of
the Guarantor's  annual report to stockholders for such year; and the Issuer and
the  Guarantor  will furnish to CSFBC and,  upon  request,  to each of the other
Purchasers  (i) as soon as available,  a copy of each report and any  definitive
proxy  statement  of either  of the  Issuer  and the  Guarantor  filed  with the
Commission  under the Exchange Act or mailed to stockholders  and (ii) from time
to time, such other publicly available information concerning the Issuer and the
Guarantor as CSFBC may reasonably request.

     (e) During the period of two years after the Closing  Date,  the Issuer and
the Guarantor will, upon request, furnish to CSFBC, each of the other Purchasers
and any holder of Offered  Securities  a copy of the  restrictions  on  transfer
applicable to the Offered Securities.

     (f) During the period of two years after the Closing  Date,  the Issuer and
the Guarantor will not, and will not permit any of their  affiliates (as defined
in Rule 144 under the Securities  Act) to, resell any of the Offered  Securities
that have been reacquired by any of them.

     (g) During the period of two years after the Closing  Date,  neither of the
Issuer and the Guarantor will be or become, an open-end investment company, unit
investment trust or face-amount certificate company that is or is required to be
registered  under  Section 8 of the  Investment  Company Act, and neither of the
Issuer and the  Guarantor  is, or will be or  become,  a  closed-end  investment
company  required to be  registered,  but not  registered,  under the Investment
Company Act.

     (h) The Guarantor  will pay all expenses  incidental to the  performance of
the  Issuer's  and the  Guarantor's  obligations  under this  Agreement  and the
Indenture,  including  (i)  the  fees  and  expenses  of  the  Trustee  and  its
professional advisers; (ii) all



<PAGE>


                                                                            13

expenses in connection with the execution, issue, authentication,  packaging and
initial delivery of the Offered Securities, the preparation and printing of this
Agreement,  the Offered  Securities,  the Indenture,  the Offering  Document and
amendments  and  supplements  thereto,  and any other  document  relating to the
issuance, offer, sale and delivery of the Offered Securities;  (iii) the cost of
qualifying the Offered Securities for trading in the Private  Offerings,  Resale
and  Trading  through  Automated  Linkages  (PORTAL)  market  and  any  expenses
incidental thereto;  (iv) the cost of any advertising approved by the Issuer and
the Guarantor in connection  with the issue of the Offered  Securities;  (v) any
expenses  (including fees and  disbursements of counsel)  incurred in connection
with  qualification  of the Offered  Securities  for sale under the laws of such
jurisdictions  in the  United  States  and  Canada as CSFBC  designates  and the
printing of memoranda  relating  thereto;  (vi) any fees  charged by  investment
rating agencies for the rating of the Offered Securities; and (vii) all expenses
incurred in  distributing  the Offering  Document  (including any amendments and
supplements  thereto) to the Purchasers.  The Issuers will also pay or reimburse
the Purchasers for 50% of the  reasonable  fees and expenses of the  Purchasers'
counsel,  Cravath,  Swaine & Moore, incurred in connection with the transactions
contemplated in this Agreement.

     (i) In connection  with the  offering,  until CSFBC shall have notified the
Issuer and the  Guarantor  and the other  Purchasers  of the  completion  of the
resale of the Offered  Securities,  neither the Issuer, the Guarantor nor any of
their  affiliates  has or will  (unless  required by the terms of the  indenture
governing  such  Offered  Securities),  either  alone or with one or more  other
persons,  bid  for  or  purchase  for  any  account  in  which  it or any of its
affiliates has a beneficial interest any Offered Securities or attempt to induce
any person to purchase any Offered Securities; and neither they nor any of their
affiliates  will make bids or purchases for the purpose of creating  actual,  or
apparent, active trading in, or of raising the price of, the Offered Securities.

     (j) The Issuer and the Guarantor will not at any time offer, sell, contract
to sell, pledge or otherwise dispose of, directly or indirectly,  any securities
under  circumstances  where such offer,  sale,  pledge,  contract or disposition
would cause the exemption  afforded by Section 4(2) of the Securities Act or the
safe harbor of  Regulation S thereunder  to cease to be  applicable to the offer
and sale of the Offered Securities.

     (k) The Issuer and the Guarantor  will cause each Offered  Security to bear
the legend set forth in the form of Note attached as Exhibit 1 to the Rule 144A/
Regulation  S Appendix to the  relevant  Indenture  until such  legend  shall no
longer be necessary or advisable  because the Offered  Securities  are no longer
subject to the restrictions on transfer described therein.




<PAGE>


                                                                            14

     (l) The proceeds to the Issuer from the offering of the Offered  Securities
will be used only, as contemplated by Section 4.21 of the Indenture, to purchase
equipment or inventory specifically permitted to be purchased with such proceeds
by the Old Indentures.

     6. Conditions of the Obligations of the Purchasers.  The obligations of the
several  Purchasers  to  purchase  and pay for the  Offered  Securities  will be
subject to the performance by the Issuer and the Guarantor of their  obligations
hereunder and to the following additional conditions precedent:

         (a) The  Purchasers  shall have received an opinion,  dated the Closing
Date, of (i) Graubard Mollen & Miller, counsel for the Issuer and the Guarantor,
and (ii) Willkie Farr & Gallagher,  counsel for the Issuer and the  Guarantor on
FCC matters,  in each case  substantially to the effect set forth in Annex I and
Annex II, respectively.

         (b) The  Purchasers  shall have received from Cravath,  Swaine & Moore,
counsel for the  Purchasers  (or,  if such  counsel  shall fail to deliver  such
opinion, other counsel reasonably acceptable to the Purchasers), such opinion or
opinions,  dated the Closing  Date,  with  respect to the  incorporation  of the
Issuer and the Guarantor, the validity of the Offered Securities,  the exemption
from registration for the offer and sale of the Offered Securities by the Issuer
and the  Guarantor  to the  several  Purchasers  and the  resales by the several
Purchasers  as  contemplated  hereby  and  other  related  matters  as CSFBC may
reasonably  require,  and the Issuer and the Guarantor  shall have  furnished to
such  counsel  such  documents  as they  reasonably  request  for the purpose of
enabling them to pass upon such matters.

         (c) The Purchasers shall have received a certificate, dated the Closing
Date, of the Chief Executive  Officer or any Vice President and the Treasurer or
a  principal  financial  or  accounting  officer  of each of the  Issuer and the
Guarantor  in  which  such  officers,  to the  best  of  their  knowledge  after
reasonable  investigation,  shall state that the Issuer and the  Guarantor  have
complied with all  agreements  and satisfied all  conditions on their part to be
performed or satisfied hereunder at or prior to the Closing Date.

         The Issuer and the  Guarantor  will  furnish the  Purchasers  with such
conformed  copies of such opinions,  certificates,  letters and documents as the
Purchasers reasonably request.  CSFBC may in its sole discretion waive on behalf
of the  Purchasers  compliance  with any  conditions to the  obligations  of the
Purchasers hereunder, whether in respect of the Closing Date or otherwise.

     7. Indemnification and Contribution.  (a) The Issuer and the Guarantor will
jointly and severally  indemnify and hold  harmless each  Purchaser  against any
losses,



<PAGE>


                                                                            15

claims,  damages or liabilities,  joint or several,  to which such Purchaser may
become  subject,  under the  Securities  Act or the Exchange  Act or  otherwise,
insofar as such losses,  claims,  damages or liabilities  (or actions in respect
thereof) arise out of or are based upon any breach of any of the representations
and  warranties of the Issuer and the Guarantor  contained  herein or any untrue
statement or alleged  untrue  statement of any  material  fact  contained in the
Offering Document,  or any amendment or supplement  thereto,  or arise out of or
are based upon the omission or alleged omission to state therein a material fact
necessary  in  order  to  make  the  statements  therein,  in the  light  of the
circumstances  under which they were made,  not  misleading,  and will reimburse
each  Purchaser  for any legal or other  expenses  reasonably  incurred  by such
Purchaser in connection with  investigating  or defending any such loss,  claim,
damage,  liability or action as such expenses are incurred;  provided,  however,
that the  Issuer  and the  Guarantor  will not be liable in any such case to the
extent that any such loss, claim,  damage or liability arises out of or is based
upon an untrue  statement or alleged untrue  statement in or omission or alleged
omission  from any of such  documents in reliance  upon and in  conformity  with
written  information  furnished to the Issuer and the Guarantor by any Purchaser
through CSFBC specifically for use therein.

         (b) Each Purchaser  will  severally and not jointly  indemnify and hold
harmless the Issuer and the  Guarantor  against any losses,  claims,  damages or
liabilities to which the Issuer or the Guarantor may become  subject,  under the
Securities Act or the Exchange Act or otherwise, insofar as such losses, claims,
damages or liabilities (or actions in respect thereof) arise out of or are based
upon any untrue  statement or alleged  untrue  statement  of any  material  fact
contained in the Offering Document,  or any amendment or supplement  thereto, or
arise out of or are based upon the  omission  or the  alleged  omission to state
therein a material fact  necessary in order to make the statements  therein,  in
the light of the  circumstances  under which they were made, not misleading,  in
each case to the extent,  but only to the extent,  that such untrue statement or
alleged  untrue  statement or omission or alleged  omission was made in reliance
upon and in conformity with written  information  furnished to the Issuer or the
Guarantor by such Purchaser through CSFBC specifically for use therein, and will
reimburse any legal or other expenses  reasonably incurred by the Issuer and the
Guarantor in connection with  investigating  or defending any such loss,  claim,
damage, liability or action as such expenses are incurred.

         (c) Promptly after receipt by an  indemnified  party under this Section
of notice of the commencement of any action,  such indemnified  party will, if a
claim in respect  thereof is to be made  against  the  indemnifying  party under
subsection (a) or (b) above,  notify the indemnifying  party of the commencement
thereof;  but the omission so to notify the indemnifying  party will not relieve
it from any liability which it may have to any indemnified  party otherwise than
under  subsection (a) or (b) above.  In case any such action is brought  against
any indemnified party and it notifies the indemnifying



<PAGE>


                                                                            16

party of the commencement  thereof,  the indemnifying  party will be entitled to
participate  therein and, to the extent that it may wish, jointly with any other
indemnifying  party  similarly  notified,  to assume the defense  thereof,  with
counsel reasonably satisfactory to such indemnified party (who shall not, except
with  the  consent  of  the  indemnified  party  (which  consent  shall  not  be
unreasonably  withheld), be counsel to the indemnifying party), and after notice
from the  indemnifying  party to such  indemnified  party of its  election so to
assume the defense thereof,  the  indemnifying  party will not be liable to such
indemnified   party  under  this  Section  for  any  legal  or  other   expenses
subsequently  incurred by such indemnified  party in connection with the defense
thereof other than reasonable  costs of  investigation.  No  indemnifying  party
shall, without the prior written consent of the indemnified party (which consent
shall not be  unreasonably  withheld),  effect any  settlement of any pending or
threatened  action in  respect of which any  indemnified  party is or could have
been a party and indemnity could have been sought  hereunder by such indemnified
party  unless  such  settlement  includes  an  unconditional   release  of  such
indemnified  party from all liability on any claims that are the subject  matter
of such action.

     (d) If the  indemnification  provided for in this Section is unavailable or
insufficient to hold harmless an indemnified  party under  subsection (a) or (b)
above,  then each  indemnifying  party  shall  contribute  to the amount paid or
payable by such indemnified party as a result of the losses,  claims, damages or
liabilities referred to in subsection (a) or (b) above (i) in such proportion as
is appropriate to reflect the relative  benefits  received by the Issuer and the
Guarantor on the one hand and the  Purchasers  on the other from the offering of
the Offered Securities or (ii) if the allocation provided by clause (i) above is
not permitted by applicable law, in such proportion as is appropriate to reflect
not only the  relative  benefits  referred  to in clause  (i) above but also the
relative  fault  of the  Issuer  and  the  Guarantor  on the  one  hand  and the
Purchasers on the other in  connection  with the  statements or omissions  which
resulted in such losses,  claims,  damages or  liabilities  as well as any other
relevant equitable considerations.  The relative benefits received by the Issuer
and the  Guarantor  on the one hand and the  Purchasers  on the  other  shall be
deemed to be in the same  proportion as the total net proceeds from the offering
(before  deducting  expenses but after deducting the  Purchasers'  discounts and
commissions)  received  by the  Issuer  and  the  Guarantor  bear  to the  total
discounts and  commissions  received by the  Purchasers  from the Issuer and the
Guarantor  under this  Agreement.  The  relative  fault shall be  determined  by
reference to, among other things, whether the untrue or alleged untrue statement
of a material fact or the omission or alleged  omission to state a material fact
relates  to  information  supplied  by  the  Issuer  and  the  Guarantor  or the
Purchasers and the parties'  relative intent,  knowledge,  access to information
and  opportunity  to correct or prevent such untrue  statement or omission.  The
amount paid by an indemnified party as a result of the losses,  claims,  damages
or liabilities referred to in the first sentence of this subsection (d) shall be
deemed to include any legal or other expenses reasonably incurred


<PAGE>


                                                                            17

by such  indemnified  party in connection  with  investigating  or defending any
action or claim which is the subject of this subsection (d). Notwithstanding the
provisions of this  subsection (d), no Purchaser shall be required to contribute
any amount in excess of the amount by which the total price at which the Offered
Securities  purchased by it were resold  exceeds the amount of any damages which
such  Purchaser has  otherwise  been required to pay by reason of such untrue or
alleged  untrue  statement  or omission  or alleged  omission.  The  Purchasers'
obligations  in this  subsection  (d) to contribute are several in proportion to
their respective purchase obligations and not joint.

         (e) The  obligations of the Issuer and the Guarantor under this Section
shall be in addition to any  liability  which the Issuer and the  Guarantor  may
otherwise  have and shall extend,  upon the same terms and  conditions,  to each
person,  if any, who controls any Purchaser within the meaning of the Securities
Act or the  Exchange  Act;  and the  obligations  of the  Purchasers  under this
Section shall be in addition to any liability  which the  respective  Purchasers
may otherwise have and shall extend, upon the same terms and conditions, to each
person,  if any, who controls either of the Issuer and the Guarantor  within the
meaning of the Securities Act or the Exchange Act.

     8. Certain Other Post-Closing  Obligations of the Issuer and the Guarantor.
(a) Upon  delivery of the  Offering  Document to the  Purchasers  as provided in
Section 5(a), the Issuer and the Guarantor shall cause the following  additional
documents to be delivered to the Purchasers:

                  (i) a letter,  dated  the date of the  Offering  Document,  of
         Grant  Thornton  LLP,  in  form  substantially  similar  to the  letter
         delivered  to the  Purchasers  by such  firm  in  connection  with  the
         transactions  contemplated  by the March Offering  Document,  with such
         changes  as  are  appropriate  to  reflect  the  inclusion  of  interim
         financial statements in the Offering Document.

                (ii) a letter  from  Graubard  Mollen & Miller,  counsel for the
         Issuer and the  Guarantor,  stating that such counsel have no reason to
         believe  that the Offering  Document,  as of such date,  contained  any
         untrue  statement  of a material  fact or omitted to state any material
         fact required to be stated  therein or necessary to make the statements
         therein,  in light of the circumstances under which they were made, not
         misleading;  it being  understood  that such  counsel  need  express no
         opinion  as  to  the  financial  statements  or  other  financial  data
         contained in the Offering Document.

         (b) In  connection  with the delivery of the  Offering  Document to the
Purchasers,  the Issuer, the Guarantor and the Purchasers shall execute a letter
setting  forth all  information  furnished to the Issuer or the Guarantor by the
Purchasers through CSFBC



<PAGE>


                                                                            18

specifically for use therein, which information shall be substantially identical
to such information provided in connection with the March Offering Document.

     9. Survival of Certain  Representations  and  Obligations.  The  respective
indemnities, agreements, representations, warranties and other statements of the
Issuer and the  Guarantor or their  officers and of the several  Purchasers  set
forth in or made  pursuant  to this  Agreement  will  remain  in full  force and
effect, regardless of any investigation, or statement as to the results thereof,
made by or on behalf of any Purchaser, the Issuer, the Guarantor or any of their
respective representatives, officers or directors or any controlling person, and
will  survive  delivery of and payment  for the Offered  Securities.  If for any
reason  the  purchase  of  the  Offered  Securities  by  the  Purchasers  is not
consummated,  the Issuer and the  Guarantor  shall  remain  responsible  for the
expenses  to be paid  or  reimbursed  by  them  pursuant  to  Section  5 and the
respective  obligations  of the Issuer  and the  Guarantor,  and the  Purchasers
pursuant to Section 7 shall remain in effect.

         10. Notices.  All  communications  hereunder will be in writing and, if
sent to the Purchasers will be mailed, delivered or telegraphed and confirmed to
the  Purchasers,  c/o Credit  Suisse First Boston  Corporation,  Eleven  Madison
Avenue,    New    York,    NY    10010,     Attention:     Investment    Banking
Department--Transactions  Advisory  Group,  or,  if  sent to the  Issuer  or the
Guarantor, will be mailed, delivered or electronically transmitted and confirmed
to, in the case of the  Issuer,  1577  Spring  Hill  Road,  6th  Floor,  Vienna,
Virginia 22182,  Attention:  General Counsel, and, in the case of the Guarantor,
230 Park  Avenue,  New York,  NY 10169,  Attention:  Timothy  Graham;  provided,
however,  that any notice to a  Purchaser  pursuant to Section 7 will be mailed,
delivered or telegraphed and confirmed to such Purchaser.

     11. Successors.  This Agreement will inure to the benefit of and be binding
upon the parties  hereto and their  respective  successors  and the  controlling
persons  referred  to in Section 7, and no other  person  will have any right or
obligation  hereunder,  except  that  holders  of  Offered  Securities  shall be
entitled to enforce the agreements for their benefit contained in the second and
third  sentences of Section 5(b) hereof  against the Issuer and the Guarantor as
if such holders were parties thereto.

     12.  Counterparts.  This  Agreement  may  be  executed  in  any  number  of
counterparts,  each of which  shall be  deemed to be an  original,  but all such
counterparts shall together constitute one and the same Agreement.

     13.  Applicable  Law. This Agreement shall be governed by, and construed in
accordance  with, the laws of the State of New York without regard to principles
of conflicts of laws.




<PAGE>


                                                                            19

         The  Issuer  and  the  Guarantor  hereby  submit  to the  non-exclusive
jurisdiction  of the Federal and state courts in the Borough of Manhattan in The
City of New York in any suit or  proceeding  arising  out of or relating to this
Agreement or the transactions contemplated hereby.

         If the foregoing is in accordance with the Purchasers' understanding of
our  agreement,  kindly  sign and return to us one of the  counterparts  hereof,
whereupon it will become a binding agreement among the Issuer, the Guarantor and
the several Purchasers in accordance with its terms.

                                    Very truly yours,

                                    WinStar Equipment II Corp., as Issuer


                                    By:
                                       ------------------------------------
                                       Name:
                                       Title:


                                    WinStar Communications, Inc., as Guarantor


                                    By:
                                       ------------------------------------
                                       Name:
                                       Title:

The foregoing Purchase Agreement
is hereby confirmed and accepted
as of the date first above written.

Credit Suisse First Boston Corporation
BT Securities Corporation

By Credit Suisse First Boston Corporation

         By:
            -------------------------------
             Name:
             Title:




<PAGE>


                                   SCHEDULE A







                                                            Principal Amount
                                                               of Offered
Purchaser                                                     Securities
- ----------                                                --------------------
Credit Suisse First Boston                                    $30,000,000
  Corporation

BT Securities Corporation                                      20,000,000
                                                             --------------
                                                              $50,000,000





                                       A-1

<PAGE>







                  UNLESS  THIS   CERTIFICATE   IS  PRESENTED  BY  AN  AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION  ("DTC"),
TO THE COMPANY (AS DEFINED  BELOW) OR ITS AGENT FOR  REGISTRATION  OF  TRANSFER,
EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS  REGISTERED IN THE NAME OF
CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
DTC  (AND  ANY  PAYMENT  IS MADE TO CEDE & CO.  OR TO SUCH  OTHER  ENTITY  AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR  OTHERWISE  BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  UNLESS  AND  UNTIL  IT IS  EXCHANGED  IN  WHOLE OR IN PART FOR
SECURITIES  IN  DEFINITIVE   REGISTERED   FORM,  THIS  CERTIFICATE  MAY  NOT  BE
TRANSFERRED  EXCEPT AS A WHOLE BY DTC TO A NOMINEE OF DTC OR BY A NOMINEE OF DTC
TO DTC OR ANOTHER  NOMINEE OF DTC OR BY DTC OR ANY SUCH  NOMINEE TO A  SUCCESSOR
DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.

                  THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY  ISSUED IN A
TRANSACTION  EXEMPT FROM REGISTRATION  UNDER THE UNITED STATES SECURITIES ACT OF
1933 (THE  "SECURITIES  ACT"),  AND THIS  SECURITY  MAY NOT BE OFFERED,  SOLD OR
OTHERWISE  TRANSFERRED  IN THE  ABSENCE OF SUCH  REGISTRATION  OR AN  APPLICABLE
EXEMPTION THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE
SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION  FROM THE  PROVISIONS OF
SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

                  THE  HOLDER OF THIS  SECURITY  AGREES  FOR THE  BENEFIT OF THE
COMPANY  THAT (A) THIS  SECURITY  MAY BE OFFERED,  RESOLD,  PLEDGED OR OTHERWISE
TRANSFERRED  ONLY  (i) TO A PERSON  WHOM THE  SELLER  REASONABLY  BELIEVES  IS A
"QUALIFIED  INSTITUTIONAL  BUYER" (AS DEFINED IN RULE 144A UNDER THE  SECURITIES
ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (ii) IN AN OFFSHORE
TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (iii) PURSUANT
TO AN EXEMPTION FROM REGISTRATION  UNDER THE SECURITIES ACT PROVIDED BY RULE 144
THEREUNDER (IF AVAILABLE),  (iv) TO THE ISSUER,  OR (v) PURSUANT TO AN EFFECTIVE
REGISTRATION  STATEMENT  UNDER THE SECURITIES  ACT, IN EACH OF CASES (i) THROUGH
(v) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED
STATES,  AND (B) THE HOLDER  WILL,  AND EACH  SUBSEQUENT  HOLDER IS REQUIRED TO,
NOTIFY  ANY  PURCHASER  OF  THIS  SECURITY  FROM IT OF THE  RESALE  RESTRICTIONS
REFERRED TO IN (A) ABOVE.



<PAGE>


                                                                            2


                  IN CONNECTION  WITH ANY  TRANSFER,  THE HOLDER WILL DELIVER TO
THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH
TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH
THE FOREGOING RESTRICTIONS.






<PAGE>


                                                                            3

                           WINSTAR EQUIPMENT II CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

                                                               CUSIP 975518AA9
No. QIB-01                                                       $50,000,000

                  WINSTAR  EQUIPMENT  II  CORP.,  a  Delaware  corporation  (the
"Company",  which term  includes any successor  under the Indenture  hereinafter
referred  to),  for  value  received,  promises  to  pay to  CEDE & CO.,  or its
registered assigns, the principal sum of FIFTY MILLION DOLLARS  ($50,000,000) on
March 15, 2004.

                  Interest Payment Dates:  March 15 and September 15, commencing
September 15, 1997.

                  Regular Record Dates:  March 1 and September 1.

                  Reference  is hereby  made to the further  provisions  of this
Note set forth on the reverse  hereof,  which further  provisions  shall for all
purposes have the same effect as if set forth at this place.




<PAGE>


                                                                            4

         IN WITNESS  WHEREOF,  the  Company  has  caused  this Note to be signed
manually or by facsimile by its duly authorized officer.

                                       WINSTAR EQUIPMENT II CORP.


                                       By:
                                          -------------------------------
                                            Name:  Kenneth J. Zinghini
                                            Title:    Vice President


                                       By:
                                          -------------------------------
                                            Name:  Frederic E. Rubin
                                            Title:   Treasurer



         This is one of the 12 1/2%  Guaranteed  Senior  Secured  Notes Due 2004
described in the within-mentioned Indenture.


Date:    August 8, 1997                UNITED STATES TRUST COMPANY
                                       OF NEW YORK, as Trustee


                                       By:
                                          -------------------------------
                                               Authorized Signatory



<PAGE>


                                                                            5



                           WINSTAR EQUIPMENT II CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

1.  Principal and Interest.

                  The Company  will pay the  principal of this Note on March 15,
2004.

                  The Company  promises to pay interest on the principal  amount
of this Note on each Interest  Payment Date, as set forth below, at the rate per
annum shown above.

                  Interest  will be  payable  semiannually  (to the  holders  of
record of the  Notes at the close of  business  on the March 1 and  September  1
immediately  preceding  the relevant  Interest  Payment  Date) on each  Interest
Payment Date, commencing September 15, 1997.

                  Interest  on the  Notes  will  accrue  from  the  most  recent
Interest Payment Date; provided,  however, that, if there is no existing default
in the  payment of  interest  and this Note is  authenticated  between a Regular
Record  Date  referred to on the face  hereof and the next  succeeding  Interest
Payment Date,  interest shall accrue from such Interest  Payment Date.  Interest
will be  computed  on the  basis of a  360-day  year of  twelve  30-day  months.
Notwithstanding  the above,  (i) if a  Registration  Default  (as defined in the
Registration  Rights Agreement) occurs,  additional interest will accrue on this
Note at a rate of 0.50% per annum from and  including the date on which any such
Registration Default shall occur to but excluding the earlier of (x) the date on
which all  Registration  Defaults  have been cured and (y) the date on which all
Notes become freely transferable by Holders other than Affiliates of the Company
without further registration under the Securities Act.

                  The  Company  shall pay  interest  on  overdue  principal  and
premium, if any, and (to the extent lawful) interest on overdue  installments of
interest.

2.  Method of Payment.

         The Company will pay principal as provided  above and interest  (except
defaulted  interest) on the principal  amount of the Notes as provided  above on
each March 15 and  September 15 to the persons who are Holders (as  reflected in
the  Security  Register at the close of business on the March 1 and  September 1
immediately preceding the relevant Interest Payment Date), in each case, even if
the Note is cancelled on  registration  of transfer or  registration of exchange
after such record date; provided,  however, that, with respect to the payment of
principal,  the Company will not make payment to the Holder  unless this Note is
surrendered to a Paying Agent.



<PAGE>


                                                                            6

         The  Company  will pay  principal  and  interest in money of the United
States  that at the time of  payment is legal  tender for  payment of public and
private  debts.  Payments in respect of the Notes  represented  by a global Note
(including  principal,  premium and  interest)  will be made by wire transfer of
immediately  available funds to the accounts  specified by The Depository  Trust
Company.  The Company will make all payments in respect of a  certificated  Note
(including principal, premium and interest) by mailing a check to the registered
address  of  each  Holder  thereof;  provided,   however,  that  payments  on  a
certificated  Note  will  be  made by wire  transfer  to a U.S.  dollar  account
maintained  by the payee with a bank in the United  States if such Holder elects
payment by wire transfer by giving  written  notice to the Trustee or the Paying
Agent to such effect  designating such account no later than 30 days immediately
preceding  the  relevant due date for payment (or such other date as the trustee
may accept in its discretion).

3.  Paying Agent and Registrar.

                  Initially,  United  States  Trust  Company  of New  York  (the
"Trustee") will act as  authenticating  agent,  Paying Agent and Registrar.  The
Company may change any authenticating  agent,  Paying Agent or Registrar without
notice.  The Company,  any Subsidiary or any Affiliate of any of them may act as
Paying Agent, Registrar or co-Registrar.

4.  Indenture.

                  The Company  issued the Notes under an  Indenture  dated as of
August 1, 1997 (the  "Indenture"),  among the Company,  WinStar  Communications,
Inc., as guarantor (the  "Guarantor") and the Trustee.  Capitalized terms herein
are used as defined in the Indenture  unless otherwise  indicated.  The terms of
the Notes  include  those  stated in the  Indenture  and those  made part of the
Indenture by reference to the Trust  Indenture Act. The Notes are subject to all
such terms,  and Holders are referred to the Indenture  and the Trust  Indenture
Act for a statement of all such terms.  To the extent  permitted  by  applicable
law,  in the event of any  inconsistency  between the terms of this Note and the
terms of the Indenture, the terms of the Indenture shall control.

                  The Notes are secured senior indebtedness of the Company.  The
Indenture  limits  the  original  aggregate  principal  amount  of the  Notes to
$50,000,000 (subject to Section 2.07 of the Indenture).

5.  Optional Redemption.

                  The Notes  will not be  redeemable  prior to March  15,  2002.
Thereafter,  the Notes will be redeemable,  at the Company's option, in whole at
any time or in part  from time to time on or after  March 15,  2002 and prior to
maturity,  upon not less than 30 nor more than 60 days' prior  notice  mailed by
first-class  mail to each  Holders'  last  address as it appears in the Security
Register, at the following Redemption Prices (expressed as a percentage of the



<PAGE>


                                                                            7

principal amount of the Notes, plus accrued and unpaid interest, if any, on such
amount to the Redemption  Date (subject to the right of Holders of record on the
relevant  Regular  Record  Date  that is on or prior to the  Redemption  Date to
receive  interest due on the relevant  Interest  Payment Date if redeemed during
the 12-month period commencing on March 15 of the years set forth below:

                           Year                           Redemption Price
                           ----                          ------------------
                           2002                               106.250%
                           2003 and thereafter                103.125%

6.  Mandatory Redemption.

                  In the event that by August 8,  1999,  the  Company  shall not
have applied at least $50.0 million to fund the Acquisition  Costs of Designated
Equipment  pursuant to the Indenture  ($50.0  million less the amount so applied
being herein  called the "Unused  Equipment  Amount"),  the Company shall redeem
Notes in an aggregate principal amount equal to the Unused Equipment Amount at a
redemption  price of 112.5% of such  principal  amount,  plus accrued and unpaid
interest  thereon to the  Redemption  Date  (subject  to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to  receive  interest  due on the  relevant  Interest  Payment  Date).  The
mandatory redemption shall occur no later than August 23, 1999.

                  Selection of the Notes for mandatory  redemption  will be made
on a pro rata  basis;  provided,  however,  that no Note of $1,000 in  principal
amount or less shall be  redeemed  in part.  If any Notes are to be  redeemed in
part  only,  a new Note in  principal  amount  equal to the  unredeemed  portion
thereof will be issued in the name of the Holder  thereof upon  cancellation  of
the original Note.

7.  Notice of Redemption.

                  Notice  of any  optional  redemption  will  be  mailed  by the
Company at least 30 days but not more than 60 days before a Redemption Date, and
notice of a  mandatory  redemption  will be mailed  by the  Company  at least 10
Business  Days but not more than 15 Business  Days before a Redemption  Date, in
each case,  to each  Holder of Notes to be  redeemed  at his last  address as it
appears in the Security Register.  Notes in original  denominations  larger than
$1,000  may be  redeemed  in part;  provided,  however,  that Notes will only be
issued  in  denominations  of $1,000  principal  amount  or  integral  multiples
thereof.  On and after the Redemption  Date,  interest ceases to accrue on Notes
(or portions of Notes) called for redemption, unless the Company defaults in the
payment of the Redemption Price.

8.  Repurchase upon Change in Control.



<PAGE>


                                                                            8

         Upon the occurrence of a Change of Control,  each Holder shall have the
right to require the  repurchase of its Notes by the Company in cash pursuant to
the offer  described in the  Indenture at a purchase  price equal to 101% of the
principal amount of such Notes on such date of purchase, plus accrued and unpaid
interest, if any, on such amount to the date of purchase (the "Change of Control
Payment").

         A notice of such Change of Control will be mailed  within 30 days after
any Change of Control occurs to each Holder at his last address as it appears in
the Security Register. Notes in original denominations larger than $1,000 may be
sold to the Company in part; provided,  however,  that Notes will only be issued
in denominations  of $1,000  principal amount at maturity or integral  multiples
thereof.  On and after the Change of Control  Payment Date,  interest  ceases to
accrue on Notes or portions of Notes  surrendered  for  purchase by the Company,
unless the Company defaults in the payment of the Change of Control Payment.

9.  Guarantee.

         The  Notes  are  guaranteed  on a  senior  unsubordinated  basis by the
Guarantor to the extent provided in the Indenture.

10.  Collateral and Security Documents.

         To secure the due and punctual  payment of the principal of, premium if
any,  and  interest  on the Notes and all other  amounts  payable by the Company
under the Indenture and the Notes when and as the same shall be due and payable,
whether at  maturity,  by  acceleration  or  otherwise,  the Grantor has granted
security  interests in the Collateral to the Collateral Agent for the benefit of
the Holders of Notes pursuant to the Security Documents.

11.  Denominations; Transfer; Exchange.

                  The  Notes  are  in   registered   form  without   coupons  in
denominations of $1,000 of principal amount and integral  multiples  thereof.  A
Holder may  register the  transfer or exchange of Notes in  accordance  with the
Indenture.  The Registrar may require a Holder,  among other things,  to furnish
appropriate  endorsements  and transfer  documents and to pay any taxes and fees
required by law or permitted by the  Indenture.  The Registrar need not register
the transfer or exchange of any Notes selected for redemption. Also, it need not
register  the transfer or exchange of any Notes for a period of 15 days before a
selection of Notes to be redeemed is made.

12.  Persons Deemed Owners.

         A Holder shall be treated as the owner of a Note for all purposes.



<PAGE>


                                                                            9

13.  Unclaimed Money.

         If money for the  payment of  principal,  premium,  if any, or interest
remains  unclaimed for two years,  the Trustee and the Paying Agent will pay the
money back to the Company at its request.  After that,  Holders  entitled to the
money must look to the Company for payment,  unless an applicable law designates
another  Person,  and all  liability  of the Trustee and such Paying  Agent with
respect to such money shall cease.

14.  Discharge Prior to Redemption or Maturity.

         Subject to certain  conditions,  the Company at any time may  terminate
some or all of its obligations  under the Notes,  the Indenture and the Security
Documents,  and the Guarantor may terminate its obligations  under the Equipment
Note  Guarantee,  if the  Company  deposits  with  the  Trustee  money  or  U.S.
Government  Obligations  for payment of  principal  and interest on the Notes to
redemption or maturity, as the case may be.

15.  Amendment; Supplement; Waiver.

                  Subject to certain exceptions,  the Indenture or the Notes may
be  amended  or  supplemented  with the  consent  of the  Holders  of at least a
majority in  principal  amount of the Notes then  outstanding,  and any existing
default or  compliance  with any provision may be waived with the consent of the
Holders  of  at  least  a  majority  in  principal  amount  of  the  Notes  then
outstanding. Without notice to or the consent of any Holder, the parties thereto
may amend or supplement the Indenture or the Notes to, among other things,  cure
any ambiguity,  defect or inconsistency and make any change that, in the opinion
of the Board of Directors  of the Company,  does not  materially  and  adversely
affect the rights of any Holder.

16.  Restrictive Covenants.

                  The Indenture  imposes  certain  limitations on the ability of
the  Guarantor and its  Restricted  Subsidiaries,  among other things,  to incur
additional  indebtedness;  create liens; engage in sale-leaseback  transactions;
pay  dividends or make  distributions  in respect of their capital  stock;  make
investments or make certain other  restricted  payments;  sell assets;  issue or
sell stock of Restricted Subsidiaries; enter into transactions with stockholders
or affiliates;  or, with respect to the Company, to incur any indebtedness other
than the  Notes;  engage  in any  other  business  activities;  apply  the gross
proceeds  from  the sale of the  Notes to uses  other  than the  acquisition  of
Designated  Equipment;  fail to take  action to vest a security  interest in the
Designated  Equipment  in the  Trustee;  fail to file proper  UCC-1s and UCC-3s;
consolidate,  merge or sell all or  substantially  all of its assets.  Within 90
days after the end of the last fiscal  quarter of each year,  the  Company  must
report to the Trustee on compliance with such limitations.




<PAGE>


                                                                            10

17.  Successor Persons.

                  Generally, when a successor person or other entity assumes all
the  obligations  of its  predecessor  under the Notes  and the  Indenture,  the
predecessor person will be released from those obligations.

18.  Defaults and Remedies.

                  The following events constitute  "Events of Default" under the
Indenture:  (a) default in the payment of principal of (or premium,  if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise;  (b)  default in the  payment of  interest  on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company or WCI defaults in the performance of or breaches any other covenant
or  agreement  of the Company or WCI in the  Indenture or under the Notes or the
Security  Documents  and such  default  or breach  continues  for a period of 30
consecutive  days after  written  notice by the Trustee or the Holders of 25% or
more in aggregate  principal  amount of the Notes; (d) there occurs with respect
to any issue or  issues of  Indebtedness  of WCI or any  Significant  Subsidiary
having an outstanding  principal  amount of $25,000,000 or more in the aggregate
for all such issues of all such Persons, whether such Indebtedness now exists or
shall  hereafter be created,  (i) an event of default that has caused the holder
thereof to declare such  Indebtedness  to be due and payable prior to its Stated
Maturity  and  such  Indebtedness  has  not  been  discharged  in  full  or such
acceleration  has  not  been  rescinded  or  annulled  within  30  days  of such
acceleration  and/or (ii) the  failure to make a principal  payment at the final
(but not any interim) fixed  maturity and such defaulted  payment shall not have
been made,  waived or extended within 30 days of such payment  default;  (e) any
final  judgment or order (not covered by insurance)  for the payment of money in
excess of  $25,000,000  in the aggregate for all such final  judgments or orders
against all such Persons (treating any deductibles,  self-insurance or retention
as not so covered) shall be rendered  against WCI or any Significant  Subsidiary
and  shall  not be paid or  discharged,  and  there  shall be any  period  of 60
consecutive  days following entry of the final judgment or order that causes the
aggregate amount for all such final judgments or orders outstanding and not paid
or discharged against all such Persons to exceed $25,000,000 during which a stay
of enforcement of such final judgment or order, by reason of a pending appeal or
otherwise,  shall  not be in  effect;  (f) a court  having  jurisdiction  in the
premises  enters a decree  or order  for (i)  relief  in  respect  of WCI or any
Significant  Subsidiary in an involuntary case under any applicable  bankruptcy,
insolvency or other similar law now or hereafter in effect,  (ii) appointment of
a receiver,  liquidator,  assignee,  custodian, trustee, sequestrator or similar
official of WCI or any Significant Subsidiary or for all or substantially all of
the  property  and  assets  of WCI or any  Significant  Subsidiary  or (iii) the
winding up or  liquidation of the affairs of WCI or any  Significant  Subsidiary
and, in each case,  such decree or order shall remain unstayed and in effect for
a period of 60  consecutive  days;  (g) WCI or any  Significant  Subsidiary  (i)
commences a voluntary case under any applicable bankruptcy,  insolvency or other
similar law now or hereafter in effect, or consents to the entry of an order for
relief in an involuntary case



<PAGE>


                                                                           11

under any such law, (i) consents to the appointment of or taking possession by a
receiver,  liquidator,  assignee,  custodian,  trustee,  sequestrator or similar
official of WCI or any Significant Subsidiary or for all or substantially all of
the property and assets of WCI or any  Significant  Subsidiary  or (iii) effects
any general  assignment for the benefit of creditors;  (h) any of the provisions
of the Indenture  relating to the Security  Documents or the Security  Documents
shall  cease to be in full force and effect or shall  cease to give the  secured
parties the Liens, rights, power and privileges purported to be created thereby;
or (i) the Equipment Note  Guarantee  shall cease to be in full force and effect
(other  than in  accordance  with its  terms)  or the  Guarantor  shall  deny or
disaffirm its obligations under the Equipment Note Guarantee.

         If an Event of Default  (other  than an Event of Default  specified  in
clause (f) or (g) above that occurs  with  respect to the Company or WCI) occurs
and is continuing  under the  Indenture,  the Trustee or the Holders of at least
25% in aggregate  principal amount of the Notes,  then  outstanding,  by written
notice  to the  Company  (and to the  Trustee  if such  notice  is  given by the
Holders), may, and the Trustee at the request of such Holders shall, declare the
principal of, premium, if any, and accrued interest,  if any, on the Notes to be
immediately due and payable.  If a bankruptcy or insolvency default with respect
to the  Company  or any  Restricted  Subsidiary  occurs and is  continuing,  the
principal amount of the Notes automatically becomes due and payable. Holders may
not enforce the Indenture or the Notes except as provided in the Indenture.  The
Trustee  may  require  indemnity  satisfactory  to it  before  it  enforces  the
Indenture or the Notes.  Subject to certain  limitations,  Holders of at least a
majority  in  principal  amount of the Notes  then  outstanding  may  direct the
Trustee in its exercise of any trust or power.

19.  Trustee Dealings with Company.

                  The Trustee  under the  Indenture,  in its  individual  or any
other capacity, may make loans to, accept deposits from and perform services for
the Company or its  Affiliates  and may  otherwise  deal with the Company or its
Affiliates as if it were not the Trustee.

20.  No Recourse Against Others.

                  No incorporator,  stockholder,  officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such  obligations or their creation  provided,  however,  that the foregoing
shall not affect the Guarantor's  obligations with respect to the Equipment Note
Guarantee.  Each  Holder  by  accepting  a Note  waives  and  releases  all such
liability.  Such  waiver  and  release  are  part of the  consideration  for the
issuance of the Notes.




<PAGE>


                                                                           12

21.  Authentication.

                  This  Note   shall  not  be  valid   until  the   Trustee   or
authenticating  agent signs the certificate of  authentication on the other side
of this Note.

22.  Holders' Compliance with Registration Rights Agreement.

                  Each Holder of a Note, by acceptance hereof,  acknowledges and
agrees  to the  provisions  of the  Registration  Rights  Agreement,  including,
without   limitation,   the  obligations  of  the  Holders  with  respect  to  a
registration  and the  indemnification  of the  Company to the  extent  provided
therein.

23.  Abbreviations.

         Customary  abbreviations  may be used in the  name  of a  Holder  or an
assignee,  such as:  TEN COM (= tenants  in  common),  TEN ENT (= tenants by the
entireties),  JT TEN (= joint  tenants  with  right of  survivorship  and not as
tenants in common),  CUST (=  Custodian)  and U/G/M/A (= Uniform Gifts to Minors
Act).

24.  Governing Law.

         The  Indenture  and the Notes shall be governed by the law of the State
of New York,  excluding (to the extent  permissible by law) any rule of law that
would cause the application of the laws of any jurisdiction other than the State
of New York.

         The Company will furnish to any Holder upon written request and without
charge a copy of the  Indenture.  Requests  may be made to WinStar  Equipment II
Corp.,  1577 Spring Hill Road, 6th Floor,  Vienna,  Virginia  22182,  Attention:
General Counsel.






<PAGE>


                                                                           13

                                 ASSIGNMENT FORM


I or we assign and transfer this Note to:



Please insert social security or other identifying number of assignee


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

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


Print or type name,  address and zip code of assignee  and  irrevocably  appoint
__________________, as agent, to transfer this Note on the books of the Company.

The agent may substitute another to act for him.

Dated _________________               Signed _______________


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

(Sign exactly as name appears on the other side of this Note)


Signature Guarantee ___________________________________(1)

In  connection  with any  transfer of any of the  Securities  evidenced  by this
certificate  occurring prior to the expiration of the period referred to in Rule
144(k) under the Securities Act after the later of the date of original issuance
of such Securities and the last date, if any, on which

_________________________________
(1) The Holder's  signature  must be guaranteed by a member firm of a registered
national  securities  exchange  or of the  National  Association  of  Securities
Dealers,  Inc.,  a  commercial  bank  or  trust  company  having  an  office  or
correspondent  in the United States or an "eligible  guarantor  institution"  as
defined by Rule 17Ad-15 under the Exchange Act.



<PAGE>


                                                                           14

such Securities  were owned by the Company or any Affiliate of the Company,  the
undersigned  confirms that such  Securities are being  transferred in accordance
with its terms:

CHECK ONE BOX BELOW

(1)  |_| to the Company; or

(2)  |_| pursuant to an effective  registration  statement  under the Securities
     Act of 1933; or

(3)  |_| inside  the  United  States to a  "qualified  institutional  buyer" (as
     defined in Rule 144A under the  Securities  Act of 1933) that purchases for
     its own account or for the account of a  qualified  institutional  buyer to
     whom  notice is given that such  transfer is being made in reliance on Rule
     144A, in each case  pursuant to and in compliance  with Rule 144A under the
     Securities Act of 1933; or

(4)  |_| outside the United States in an offshore transaction within the meaning
     of Regulation S under the Securities Act in compliance  with Rule 904 under
     the Securities Act of 1933; or

(5)  |_| pursuant to another available  exemption from registration  provided by
     Rule 144 under the Securities Act of 1933.

         Unless one of the boxes is checked, the Trustee will refuse to register
         any of the Securities  evidenced by this certificate in the name of any
         person other than the registered  holder  thereof;  provided,  however,
         that if box (4) or (5) is checked,  the Trustee may  require,  prior to
         registering any such transfer of the  Securities,  such legal opinions,
         certifications  and other  information  as the Company  has  reasonably
         requested  to confirm that such  transfer is being made  pursuant to an
         exemption from, or in a



<PAGE>


                                                                           15

         transaction  not  subject  to,  the  registration  requirements  of the
         Securities  Act of 1933,  such as the  exemption  provided  by Rule 144
         under such Act.




                                                     ------------------------
                                                            Signature

Signature Guarantee:

- ------------------------                             ------------------------
Signature must be guaranteed                                Signature



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

              TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED.

                  The undersigned  represents and warrants that it is purchasing
this  Security  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
Securities  Act of  1933,  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 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: ________________                       ______________________________
                                              NOTICE: To be executed by
                                                      an executive officer


              SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

                  The following  increases or decreases in this Global  Security
have been made:
<TABLE>
<CAPTION>


Date of                   Amount of decrease in     Amount of increase in     Principal amount of this      Signature of authorized
Exchange                  Principal  Amount of this Principal Amount of this  Global Security following     officer of Trustee or
                          Global Security           Global Security           such decrease or increase     Securities Custodian
<S>                            <C>                         <C>                          <C>                          <C>   

</TABLE>






<PAGE>


                                                                           16
                       OPTION OF HOLDER TO ELECT PURCHASE


     If you wish to have this Note purchased by the Company  pursuant to Section
4.11 or Section 4.12 of the Indenture, check the Box:      |_|

                  If you wish to have a portion  of this Note  purchased  by the
Company  pursuant to Section  4.11 or Section 4.12 of the  Indenture,  state the
amount (in principal amount):
$_____________

Date: _____________

Your Signature: ___________________________________________________________
             (Sign exactly as your name appears on the other side of this Note)

Signature Guarantee: _________________________



<PAGE>


                                                                EXECUTION COPY

                           WINSTAR EQUIPMENT II CORP.,
                                    as Issuer


                          WINSTAR COMMUNICATIONS, INC.,
                                  as Guarantor

                                       and


                    UNITED STATES TRUST COMPANY OF NEW YORK,
                                   as Trustee

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

                    Guaranteed Senior Secured Notes Indenture

                           Dated as of August 1, 1997

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


                12 1/2% Guaranteed Senior Secured Notes Due 2004








<PAGE>




                              CROSS-REFERENCE TABLE


TIA Sections                                                Indenture Sections

310(a)(1).......................................................   7.10
   (a)(2).......................................................   7.10
   (b)..........................................................   7.08
313(c)..........................................................   7.06; 12.02
314(a)..........................................................   4.20; 12.02
   (a)(4).......................................................   4.19; 12.02
   (c)(1).......................................................  12.03
   (c)(2).......................................................  12.03
   (e)..........................................................  12.04
315(b)..........................................................   7.05; 12.02
316(a)(1)(A)....................................................   6.05
   (a)(1)(B)....................................................   6.04
   (b)..........................................................   6.07
317(a)(1).......................................................   6.08
   (a)(2).......................................................   6.09
318(a)..........................................................  12.01
   (c)..........................................................  12.01



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

Note: The Cross-Reference Table shall not for any purpose be deemed to be a part
of the Indenture.


<PAGE>




                                TABLE OF CONTENTS
<TABLE>
<CAPTION>


                                                                                                               Page
<S>                         <C>                                                                                <C>   
RECITALS OF THE COMPANY...........................................................................................1

                                                    ARTICLE ONE
                                    DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.01            Definitions...............................................................................1
                        -----------
SECTION 1.02.           Incorporation by Reference of Trust Indenture Act........................................16
                        -------------------------------------------------
SECTION 1.03.           Rules of Construction....................................................................16
                        ---------------------
SECTION 1.04.           Designation of the Securities............................................................17
                        -----------------------------

                                                    ARTICLE TWO
                                                  THE SECURITIES

SECTION 2.01.           Form and Dating..........................................................................17
                        ---------------
SECTION 2.02.           Execution and Authentication.............................................................17
                        ----------------------------
SECTION 2.03.           Registrar and Paying Agent...............................................................18
                        --------------------------
SECTION 2.04.           Paying Agent To Hold Money in Trust......................................................18
                        -----------------------------------
SECTION 2.05.           Securityholder Lists.....................................................................18
                        --------------------
SECTION 2.06.           Transfer and Exchange....................................................................18
                        ---------------------
SECTION 2.07.           Replacement Securities...................................................................19
                        ----------------------
SECTION 2.08.           Outstanding Securities...................................................................19
                        ----------------------
SECTION 2.09.           Temporary Securities.....................................................................20
                        --------------------
SECTION 2.10.           Cancellation.............................................................................20
                        ------------
SECTION 2.11.           Defaulted Interest.......................................................................20
                        ------------------
SECTION 2.12.           CUSIP Numbers ...........................................................................20
                        -------------

                                                   ARTICLE THREE
                                                    REDEMPTION

SECTION 3.01.           Right of Optional Redemption.............................................................21
                        ----------------------------
SECTION 3.02            Mandatory Redemption.....................................................................21
                        --------------------
SECTION 3.03.           Notices to Trustee.......................................................................21
                        ------------------
SECTION 3.04.           Selection of Securities To Be Redeemed...................................................21
                        --------------------------------------
SECTION 3.05.           Notice of Redemption.....................................................................22
                        --------------------
SECTION 3.06.           Effect of Notice of Redemption...........................................................23
                        ------------------------------
SECTION 3.07.           Deposit of Redemption Price..............................................................23
                        ---------------------------
SECTION 3.08.           Payment of Securities Called for Redemption..............................................23
                        -------------------------------------------

</TABLE>

<PAGE>


                                       ii

<TABLE>
<CAPTION>
<S>                        <C>                                                                                  <C> 
SECTION 3.09.           Securities Redeemed in Part..............................................................23
                        ---------------------------

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

Note:  The Table of Contents shall not for any purpose be deemed to be a part of
the Indenture.


                                                   ARTICLE FOUR
                                                     COVENANTS

SECTION 4.01.           Payment of Securities....................................................................23
                        ---------------------
SECTION 4.02.           Maintenance of Office or Agency..........................................................24
                        -------------------------------
SECTION 4.03.           Limitation on Indebtedness...............................................................24
                        --------------------------
SECTION 4.04.           Limitation on Restricted Payments........................................................26
                        ---------------------------------
SECTION 4.05.           Limitation on Dividend and Other Payment Restrictions Affecting
                          Restricted Subsidiaries................................................................28
SECTION 4.06.           Limitation on the Issuance of Capital Stock of Restricted Subsidiaries...................30
                        ----------------------------------------------------------------------
SECTION 4.07.           Limitation on Issuances of Guarantees by Restricted Subsidiaries ........................30
                        -----------------------------------------------------------------
SECTION 4.08.           Limitation on Transactions with Shareholders and Affiliates..............................30
                        -----------------------------------------------------------
SECTION 4.09.           Limitation on Liens......................................................................31
                        -------------------
SECTION 4.10.           Limitation on Sale-Leaseback Transactions................................................32
                        -----------------------------------------
SECTION 4.11.           Limitation on Asset Sales................................................................32
                        -------------------------
SECTION 4.12.           Repurchase of Securities upon a Change of Control........................................33
                        -------------------------------------------------
SECTION 4.13.           Existence................................................................................34
                        ---------
SECTION 4.14.           Payment of Taxes and Other Claims........................................................34
                        ---------------------------------
SECTION 4.15.           Maintenance of Properties and Insurance..................................................34
                        ---------------------------------------
SECTION 4.16.           Notice of Defaults.......................................................................35
                        ------------------
SECTION 4.17.           Compliance Certificates..................................................................35
                        -----------------------
SECTION 4.18.           SEC Reports and Reports to Holders.......................................................35
                        ----------------------------------
SECTION 4.19.           Waiver of Stay, Extension or Usury Laws..................................................43
                        ---------------------------------------
SECTION 4.20.           Limitation on the Company's Business Activities .........................................36
                        -----------------------------------------------
SECTION 4.21.           Use of Proceeds .........................................................................36
                        ---------------
SECTION 4.22.           Purchase Money Security Interests .......................................................36
                        ---------------------------------
SECTION 4.23.           Impairment of Security Interest .........................................................36
                        -------------------------------
SECTION 4.24.           Ownership of the Company ................................................................37
                        ------------------------

                                                   ARTICLE FIVE
                                               SUCCESSOR CORPORATION

SECTION 5.01.           When WCI or the Company May Merge, Etc...................................................37
                        ---------------------------------------
SECTION 5.02.           Successor Substituted....................................................................38
                        ---------------------

</TABLE>

<PAGE>


                                       iii
<TABLE>
<CAPTION>

                                                                                                               Page


                                                    ARTICLE SIX
                                               DEFAULT AND REMEDIES

<S>                       <C>                                                                                    <C>
SECTION 6.01.           Events of Default........................................................................38
                        -----------------
SECTION 6.02.           Acceleration.............................................................................39
                        ------------
SECTION 6.03.           Other Remedies...........................................................................40
                        --------------
SECTION 6.04.           Waiver of Past Defaults..................................................................40
                        -----------------------
SECTION 6.05.           Control by Majority......................................................................40
                        -------------------
SECTION 6.06.           Limitation on Suits......................................................................41
                        -------------------
SECTION 6.07.           Rights of Holders to Receive Payment.....................................................41
                        ------------------------------------
SECTION 6.08.           Collection Suit by Trustee...............................................................41
                        --------------------------
SECTION 6.09.           Trustee May File Proofs of Claim.........................................................42
                        --------------------------------
SECTION 6.10.           Priorities...............................................................................42
                        ----------
SECTION 6.11.           Undertaking for Costs....................................................................42
                        ---------------------
SECTION 6.12.           Restoration of Rights and Remedies.......................................................42
                        ----------------------------------
SECTION 6.13.           Rights and Remedies Cumulative...........................................................43
                        ------------------------------
SECTION 6.14.           Delay or Omission Not Waiver.............................................................43
                        ----------------------------

                                                   ARTICLE SEVEN
                                                      TRUSTEE

SECTION 7.01.           General..................................................................................43
                        -------
SECTION 7.02.           Certain Rights of Trustee................................................................43
                        -------------------------
SECTION 7.03.           Individual Rights of Trustee.............................................................44
                        ----------------------------
SECTION 7.04.           Trustee's Disclaimer.....................................................................44
                        --------------------
SECTION 7.05.           Notice of Default........................................................................44
                        -----------------
SECTION 7.06.           Reports by Trustee to Holders............................................................45
                        -----------------------------
SECTION 7.07.           Compensation and Indemnity...............................................................45
                        --------------------------
SECTION 7.08.           Replacement of Trustee...................................................................45
                        ----------------------
SECTION 7.09.           Successor Trustee by Merger, Etc.........................................................46
                        ---------------------------------
SECTION 7.10.           Eligibility..............................................................................46
                        -----------
SECTION 7.11.           Money Held in Trust......................................................................46
                        -------------------
SECTION 7.12.           Withholding Taxes........................................................................46
                        -----------------

                                                   ARTICLE EIGHT
                                              DISCHARGE OF INDENTURE

SECTION 8.01.           Termination of Company's Obligations.....................................................47
                        ------------------------------------
SECTION 8.02.           Defeasance and Discharge of Indenture....................................................47
                        -------------------------------------
SECTION 8.03.           Defeasance of Certain Obligations........................................................49
                        ---------------------------------
SECTION 8.04.           Application of Trust Money...............................................................51
                        --------------------------
SECTION 8.05.           Repayment to Company.....................................................................51
                        --------------------

</TABLE>

<PAGE>


                                       iv
<TABLE>
<CAPTION>

                                                                                                               Page
<S>                        <C>                                                                                   <C>
SECTION 8.06.           Reinstatement............................................................................51
                        -------------
SECTION 8.07.           Insiders.................................................................................51
                        --------

                                                   ARTICLE NINE
                                        AMENDMENTS, SUPPLEMENTS AND WAIVERS

SECTION 9.01.           Without Consent of Holders...............................................................52
                        --------------------------
SECTION 9.02.           With Consent of Holders..................................................................52
                        -----------------------
SECTION 9.03.           Revocation and Effect of Consent.........................................................53
                        --------------------------------
SECTION 9.04.           Notation on or Exchange of Securities....................................................53
                        -------------------------------------
SECTION 9.05.           Trustee to Sign Amendments, Etc..........................................................54
                        -------------------------------
SECTION 9.06.           Conformity with Trust Indenture Act......................................................54
                        -----------------------------------

                                                    ARTICLE TEN
                                             EQUIPMENT NOTE GUARANTEE

SECTION 10.01.          Guarantee................................................................................54
                        ---------
SECTION 10.02.          Successors and Assigns...................................................................55
                        ----------------------
SECTION 10.03.          No Waiver............................................................................... 56
                        ---------
SECTION 10.04.          Modification.............................................................................56
                        ------------

                                                  ARTICLE ELEVEN
                                                SECURITY DOCUMENTS

SECTION 11.01.          Collateral and Security Documents........................................................56
                        ---------------------------------
SECTION 11.02.          Release of Collateral....................................................................56
                        ---------------------
SECTION 11.03.          Certificates and Opinions................................................................57
                        -------------------------

                                                  ARTICLE TWELVE
                                                   MISCELLANEOUS

SECTION 12.01.          Trust Indenture Act of 1939..............................................................57
                        ---------------------------
SECTION 12.02.          Notices..................................................................................57
                        -------
SECTION 12.03.          Certificate and Opinion as to Conditions Precedent.......................................58
                        --------------------------------------------------
SECTION 12.04.          Statements Required in Certificate or Opinion............................................59
                        ---------------------------------------------
SECTION 12.05.          Rules by Trustee, Paying Agent or Registrar..............................................59
                        -------------------------------------------
SECTION 12.06.          Payment Date Other Than a Business Day...................................................59
                        --------------------------------------
SECTION 12.07.          Governing Law............................................................................59
                        -------------
SECTION 12.08.          No Adverse Interpretation of Other Agreements............................................59
                        ---------------------------------------------
SECTION 12.09.          No Recourse Against Others...............................................................60
                        --------------------------
SECTION 12.10.          Successors...............................................................................60
                        ----------
SECTION 12.11.          Duplicate Originals......................................................................60
                        -------------------

</TABLE>

<PAGE>


                                        v
<TABLE>
<CAPTION>

                                                                                                               Page
<S>                         <C>                                                                                 <C>
SECTION 12.12.          Separability.............................................................................60
                        ------------
SECTION 12.13.          Table of Contents, Headings, Etc.........................................................60
                        ---------------------------------


EXHIBIT A          Form of Security............................................................................ A-1

Rule 144A/Regulation S Appendix .............................................................................. AP-1

</TABLE>


<PAGE>




                           INDENTURE,  dated as of August 1, 1997, among WINSTAR
                  EQUIPMENT  II CORP.,  a Delaware  corporation,  as issuer (the
                  "Company"),   WINSTAR   COMMUNICATIONS,   INC.,   a   Delaware
                  corporation,  as guarantor  (the  "Guarantor"  or "WCI"),  and
                  UNITED  STATES  TRUST  COMPANY OF NEW YORK,  as  trustee  (the
                  "Trustee").

                             RECITALS OF THE COMPANY

                  Each  party  agrees as  follows  for the  benefit of the other
party and for the equal and ratable  benefit of the Holders of the  Company's 12
1/2% Guaranteed Senior Secured Notes Due 2004 (the "Initial Securities") and, if
and when issued pursuant to a registered  exchange for Initial  Securities,  the
Company's  12 1/2%  Guaranteed  Senior  Secured  Notes Due 2004  (the  "Exchange
Securities")  and, if and when issued pursuant to a private exchange for Initial
Securities,  the Company's 12 1/2% Guaranteed Senior Secured Notes Due 2004 (the
"Private  Exchange  Securities",  together with the Exchange  Securities and the
Initial Securities, the "Securities"):


                                   ARTICLE ONE
                   DEFINITIONS AND INCORPORATION BY REFERENCE

                  SECTION 1.01. Definitions.

                  "Adjusted  Consolidated Net Income" means, for any period, the
aggregate net income (or loss) of WCI and its Restricted  Subsidiaries  for such
period determined in conformity with GAAP; provided, however, that the following
items shall be excluded in computing  Adjusted  Consolidated Net Income (without
duplication):  (i)  the  net  income  of  any  Person  (other  than  net  income
attributable to a Restricted  Subsidiary) in which any Person (other than WCI or
any of its Restricted  Subsidiaries)  has a joint interest and the net income of
any Unrestricted Subsidiary,  except to the extent of the amount of dividends or
other distributions  actually paid to WCI or any of its Restricted  Subsidiaries
by such other Person, including,  without limitation, 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  (C) of the  first
paragraph of Section 4.04 (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  WCI  or  any  of  its  Restricted  Subsidiaries  or  all  or
substantially  all of the property and assets of such Person are acquired by WCI
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;  (iv) any  gains or  losses  (on an
after-tax  basis)  attributable  to Asset  Sales;  (v)  except for  purposes  of
calculating the amount of Restricted Payments that may be made pursuant to


<PAGE>


                                        2


clause (C) of the first  paragraph  of  Section  4.04,  any  amount  paid as, or
accrued  for,  cash  dividends  on  Preferred  Stock  of WCI  or any  Restricted
Subsidiary   owned  by  Persons  other  than  WCI  and  any  of  its  Restricted
Subsidiaries; and (vi) all extraordinary gains and extraordinary losses.

                  "Adjusted  Consolidated  Net Tangible  Assets" means the total
amount  of  assets  of WCI  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 WCI and its  Restricted  Subsidiaries
(excluding intercompany items) and (ii) all goodwill,  trade names,  trademarks,
patents, unamortized debt discount and expense and other like intangibles (other
than  licenses  issued by the FCC),  all as set forth on the quarterly or annual
consolidated balance sheet of WCI and its Restricted  Subsidiaries,  prepared in
conformity  with GAAP and most  recently  filed with the SEC pursuant to Section
4.18; provided, however, that the value of any licenses issued by the FCC shall,
in the event of an auction  for  similar  licenses,  be equal to the fair market
value ascribed  thereto in good faith by the Board of Directors and evidenced by
a  Board  Resolution.  As  used  in  this  Indenture,  references  to  financial
statements of WCI and its Restricted  Subsidiaries  shall be adjusted to exclude
Unrestricted Subsidiaries if the context requires.

                  "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.

                    "Agent" means any  Registrar,  Paying Agent,  authenticating
               agent or co-Registrar.

                  "Asset  Acquisition"  means (i) an investment by WCI or any of
its Restricted  Subsidiaries  in any other Person  pursuant to which such Person
shall  become  a  Restricted  Subsidiary  of WCI or  shall  be  merged  into  or
consolidated  with  WCI or  any  of  its  Restricted  Subsidiaries  or  (ii)  an
acquisition  by WCI or any of its  Restricted  Subsidiaries  of the property and
assets of any Person other than WCI 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  transactions) in
one  transaction  or a  series  of  related  transactions  by  WCI or any of its
Restricted  Subsidiaries  to any Person other than WCI 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 WCI or any of


<PAGE>


                                        3


its Restricted  Subsidiaries or (iii) any other property or assets of WCI or any
of its Restricted Subsidiaries outside the ordinary course of business of WCI or
such  Restricted  Subsidiary  and,  in each case,  that is not  governed  by the
provisions of Article Five; provided,  however,  that the following shall not be
included within the meaning of "Asset Sale": (A) sales or other  dispositions of
inventory, receivables and other current assets; (B) sales or other dispositions
of  equipment  that has  become  worn out,  obsolete  or  damaged  or  otherwise
unsuitable  for use in  connection  with the  business of WCI or its  Restricted
Subsidiaries  and (C) a  substantially  simultaneous  exchange  of, or a sale or
disposition  (other than 85% or more for cash or cash equivalents) by WCI or any
of its Restricted Subsidiaries of, licenses issued by the FCC or applications or
bids therefor;  provided, however, that the consideration received by WCI or any
such Restricted Subsidiary in connection with such exchange, sale or disposition
shall be equal to the fair  market  value  of  licenses  so  exchanged,  sold or
disposed  of,  as  determined  by the Board of  Directors;  and (D)  except  for
purposes of the definition of "Indebtedness to EBITDA Ratio",  any sale or other
disposition  of  securities  of  an  Unrestricted  Subsidiary.   Notwithstanding
anything  to the  contrary  in this  definition,  any  sale,  transfer  or other
disposition (other than a lease in the ordinary course of business but including
the receipt of insurance  proceeds in respect of  Collateral)  of any Collateral
shall be deemed to be an Asset Sale of such Collateral.

                  "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
Company or WCI,  as the  context  requires,  or any  committee  of such Board of
Directors duly authorized to act with respect to this Indenture.

                  "Board Resolution" means a copy of a resolution,  certified by
the  Secretary  or  Assistant  Secretary  of the  Company or WCI, as the context
requires,  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
Trustee.

                  "Business  Day"  means any day  except a  Saturday,  Sunday or
other day on which  commercial  banks in The City of New York, or in the city of
the Corporate Trust Office of the Trustee, are authorized 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 now outstanding
or issued after the date of this Indenture,  including,  without limitation, all
Common Stock and Preferred Stock.



<PAGE>


                                        4


                  "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;
and "Capitalized  Lease  Obligations"  means the discounted present value of the
rental obligations under such lease.

                  "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),
other than the Permitted Investor,  becomes the ultimate  "beneficial owner" (as
defined in Rule 13d-3 under the Exchange Act) of Voting Stock  representing more
than 50% of the total voting power of the Voting Stock of the Company on a fully
diluted basis or (ii)  individuals who on the Closing Date constituted the Board
of Directors  (together  with any new directors  whose  election by the Board of
Directors or whose  nomination  for election by the Company's  stockholders  was
approved  by a vote of at  least  two-thirds  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 previously so
approved)  cease for any reason to  constitute  a majority of the members of the
Board of Directors then in office.

                  "Closing Date" means March 18, 1997.

                  "Collateral"  means (i) all Designated  Equipment  acquired by
the Company  pursuant to Section 4.21  hereof;  (ii) the proceeds of any sale or
other disposition of such Designated Equipment (including any insurance proceeds
from the loss or  destruction  of such  Designated  Equipment);  and  (iii)  any
additional Designated Equipment acquired by the Company with the proceeds of any
such sale or other disposition of Designated Equipment.

                  "Collateral  Agent"  means  the  collateral  agent  under  the
Security  Agreement,  who  initially  will be United States Trust Company of New
York.

                  "Common Stock" means. with respect to any Person,  any and all
shares,  interests,  participations  or other equivalents  (however  designated,
whether  voting or  non-voting)  of such  Person's  common  stock,  whether  now
outstanding  or issued  after  the date of this  Indenture,  including,  without
limitation, all series and classes of such common stock.

                  "Company" means the party named as such in the first paragraph
of the recitals hereof until a successor replaces it pursuant to Article Five of
this Indenture and thereafter means the successor.

                  "Company Order" means a written request or order signed in the
name of WCI or the  Company,  as the case may be,  (i) by its  Chairman,  a Vice
Chairman,  its  President  or a Vice  President  and (ii) by its  Treasurer,  an
Assistant  Treasurer,  its Secretary or an Assistant  Secretary and delivered to
the Trustee; provided, however, that such written request or order may be signed


<PAGE>


                                        5


by any two of the  officers or  directors  listed in clause (i) above in lieu of
being signed by one of such officers or directors  listed in such clause (i) and
one of the officers listed in clause (ii) above.

                  "Consolidated  EBITDA" means,  for any period,  the sum of the
amounts  for  such  period  of  (i)  Adjusted   Consolidated  Net  Income,  (ii)
Consolidated  Interest  Expense,  to the  extent  such  amount was  deducted  in
calculating Adjusted  Consolidated Net Income, (iii) income taxes, to the extent
such amount was deducted in calculating Adjusted  Consolidated Net Income (other
than income taxes (either  positive or negative)  attributable to  extraordinary
and nonrecurring gains or losses or sales of assets), (iv) depreciation expense,
to the extent such amount was deducted in calculating Adjusted  Consolidated Net
Income,  (v)  amortization  expense,  to the extent such amount was  deducted in
calculating  Adjusted  Consolidated Net Income, and (vi) all other noncash 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 noncash items increasing  Adjusted  Consolidated Net Income,
all  as  determined  on  a  consolidated   basis  for  WCI  and  its  Restricted
Subsidiaries in conformity with GAAP; provided, however, 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 quotient of (1)
the number of shares of outstanding  Common Stock of such Restricted  Subsidiary
not  owned  on the  last  day of  such  period  by WCI or any of its  Restricted
Subsidiaries  divided by (2) the total  number of shares of  outstanding  Common
Stock of such Restricted Subsidiary on the last day of such period.

                  "Consolidated  Indebtedness"  means  the  aggregate  amount of
Indebtedness of WCI and its Restricted Subsidiaries on a consolidated basis.

                  "Consolidated  Interest  Expense" means,  for any period,  the
aggregate amount of interest in respect of Indebtedness  (including 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 WCI or any of its  Restricted
Subsidiaries)  and all but the  principal  component  of  rentals  in respect of
Capitalized  Lease  Obligations  paid,  accrued or scheduled to be paid or to be
accrued by WCI 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 offering of the
Securities and the offering of the March 1997 Notes, all as


<PAGE>


                                        6


determined on a  consolidated  basis (without  taking into account  Unrestricted
Subsidiaries) in conformity with GAAP.

                  "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 WCI 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  Redeemable  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 WCI 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).

                  "Convertible   Notes"   means  the  14%   Convertible   Senior
Subordinated Discount Notes due 2005 of WCI.

                  "Convertible  Notes Indenture" means the Indenture dated as of
October 23, 1995,  between the Company and United  States  Trust  Company of New
York pursuant to which the Convertible Notes were issued.

                  "Corporate  Trust  Office"  means the office of the Trustee at
which the corporate trust business of the Trustee shall, at any particular time,
be  principally  administered,  which office is, at the date of this  Indenture,
located at 114 West 47th Street, New York, New York 10036- 1532.

                  "Currency  Agreement"  means any  foreign  exchange  contract,
currency swap agreement or other similar  agreement or  arrangement  designed to
protect  WCI or  any of its  Restricted  Subsidiaries  against  fluctuations  in
currency values to or under which WCI or any of its Restricted Subsidiaries is a
party or a  beneficiary  on the date of this  Indenture  or becomes a party or a
beneficiary thereafter.

                  "Default"  means any event that is, or after notice or passage
of time or both would be, an Event of Default.

                  "Depositary"  shall mean The  Depository  Trust  Company,  its
nominees, and their respective successors.

                  "Designated Equipment" means (i)  telecommunications  switches
and related  equipment and inventory;  (ii) customer  premise  equipment;  (iii)
radios, antennae and cabling; (iv) office and warehouse furniture,  fixtures and
equipment   (including   without   limitation,   computers  and   communications
equipment); (v) company service vehicles; and (vi) software related to each


<PAGE>


                                        7


of the foregoing,  in each case used in the  telecommunications  business of WCI
and its Subsidiaries.

                  "Equipment  Note   Guarantee"   means  the  Guarantee  of  the
Securities by the Guarantor pursuant to Article Ten hereof.

                  "Event of Default" has the meaning provided in Section 6.01.

                  "Excess Proceeds" has the meaning provided in Section 4.11.

                    "Exchange Act" means the Securities Exchange Act of 1934, as
                    amended.

                  "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) and evidenced by a Board Resolution.

                  "FCC"   means  the  United   States   Federal   Communications
Commission  and any  state or local  telecommunications  authority,  department,
commission or agency (and any successors thereto).

                  "GAAP" means generally accepted  accounting  principles in the
United  States  of  America  as in  effect  as of the  date of  this  Indenture,
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 in this Indenture  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 set forth in Article
Four and Article Five and with other  provisions of this Indenture shall be made
without  giving  effect to (i) the  amortization  of any  expenses  incurred  in
connection  with the offering of the Securities or the March 1997 Notes and (ii)
except as  otherwise  provided,  the  amortization  of any  amounts  required or
permitted by Accounting Principles Board Opinion Nos. 16 and 17.

                    "Grantor" means the Company, as grantor,  under the Security
                    Agreement.

                  "Guarantee" means any obligation,  contingent or otherwise, of
any  Person  directly  or  indirectly  guaranteeing  any  Indebtedness  or other
obligation  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 or other obligation of such other Person (whether
arising by virtue of partnership arrangements, or by agreements to keep-well, to
purchase assets, goods, securities or


<PAGE>


                                        8


services,  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  or other  obligation of the payment thereof or to
protect  such  obligee  against  loss in respect  thereof (in whole or in part);
provided,  however, 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.

                    "Guaranteed   Indebtedness"  has  the  meaning  provided  in
                    Section 4.07.

                  "Guarantor"  means  the  party  named  as  such  in the  first
paragraph  of the  recitals  hereof  until a  successor  replaces it pursuant to
Article Five of this Indenture and thereafter means the successor.

                  "Holder" or "Securityholder"  means the Person in whose name a
Security is registered on the books of the registrar.

                  "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, with respect to WCI and its Restricted Subsidiaries, an
"Incurrence"  of  Indebtedness  by  reason  of a Person  becoming  a  Restricted
Subsidiary of WCI; provided,  however,  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   (whether  negotiable  or
non-negotiable),  (iii) all  obligations of such Person in respect of letters of
credit or other similar instruments  (including  reimbursement  obligations with
respect  thereto),  (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, (v) all obligations of such Person as lessee under Capitalized Leases,
(vi) all  Indebtedness  of other Persons  secured by a Lien on any asset of such
Person,  whether or not such  Indebtedness is assumed by such Person;  provided,
however,  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 of all
unconditional  obligations  as described  above and,  with respect to contingent
obligations  that are included in any of clauses (i) through  (viii) above,  the
maximum  liability  upon the  occurrence of the  contingency  giving rise to the
obligation, provided, however, that (A) the amount


<PAGE>


                                        9


outstanding at any time of any Indebtedness  issued with original issue discount
is (1) for purposes of determining the  Indebtedness  to EBITDA Ratio,  the face
amount  of such  Indebtedness  less the  remaining  unamortized  portion  of the
original  issue  discount of such  Indebtedness  at such time as  determined  in
conformity  with GAAP and (2) for all other purposes,  the amount  determined in
clause  (1) on the  date  such  Indebtedness  is  originally  Incurred  and  (B)
Indebtedness shall not include any liability for federal,  state, local or other
taxes.

                  "Indebtedness  to  EBITDA  Ratio"  means,  as at any  date  of
determination,  the ratio of (i) the aggregate amount of Indebtedness of WCI and
its   Restricted   Subsidiaries   on   a   consolidated   basis   ("Consolidated
Indebtedness") as at the date of determination (the "Transaction  Date") to (ii)
the  Consolidated  EBITDA  of WCI for the then  most  recent  four  full  fiscal
quarters for which  reports have been filed  pursuant to Section 4.18 (such four
full  fiscal  quarter  period  being  referred  to herein  as the "Four  Quarter
Period");  provided,  however,  that (x) pro forma  effect shall be given to any
Indebtedness  Incurred from the beginning of the Four Quarter Period through the
Transaction Date (including any Indebtedness  Incurred on the Transaction Date),
to the extent  outstanding  on the  Transaction  Date,  (y) if during the period
commencing on the first day of such Four Quarter Period through the  Transaction
Date (the "Reference Period"),  WCI or any of the Restricted  Subsidiaries shall
have  engaged in any Asset Sale,  Consolidated  EBITDA for such period  shall be
reduced by an amount  equal to the  EBITDA (if  positive),  or  increased  by an
amount equal to the EBITDA (if negative),  directly  attributable  to the assets
which  are the  subject  of  such  Asset  Sale  and any  related  retirement  of
Indebtedness as if such Asset Sale and related  retirement of  Indebtedness  had
occurred  on the  first  day of such  Reference  Period  or (z) if  during  such
Reference Period WCI or any of the Restricted  Subsidiaries  shall have made any
Asset Acquisition, Consolidated EBITDA of WCI shall be calculated on a pro forma
basis as if such Asset Acquisition and any Incurrence of Indebtedness to finance
such  Asset  Acquisition  had taken  place on the  first  day of such  Reference
Period.

                  "Indenture" means this Indenture as originally  executed or as
it may be amended or  supplemented  from time to time by one or more  indentures
supplemental  to  this  Indenture   entered  into  pursuant  to  the  applicable
provisions of this Indenture.

                  "Interest Payment Date" means each semiannual interest payment
date on March 15 and September 15 of each year, commencing September 15, 1997.

                  "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  or  other  similar  agreement  or
arrangement  designed  to  protect  WCI or any  of its  Restricted  Subsidiaries
against  fluctuations  in interest rates in respect of  Indebtedness to or under
which WCI or any of its Restricted  Subsidiaries  is a party or a beneficiary on
the  date of this  Indenture  or  becomes  a party or a  beneficiary  hereafter;
provided, however, that the notional principal amount thereof does not


<PAGE>


                                       10


exceed  the  principal  amount  of the  Indebtedness  of WCI and its  Restricted
Subsidiaries that bears interest at floating rates.

                  "Investment"  in any  Person  means  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 WCI or its Restricted  Subsidiaries)
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 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 held by WCI and the  Restricted
Subsidiaries  of any Person  that has ceased to be a  Restricted  Subsidiary  by
reason  of any  transaction  permitted  by clause  (iii) of  Section  4.06.  For
purposes of the definition of  "Unrestricted  Subsidiary"  and Section 4.04, (i)
"Investment"  shall  include  the  fair  market  value  of the  assets  (net  of
liabilities)  of  any  Restricted  Subsidiary  of  WCI at  the  time  that  such
Restricted Subsidiary of WCI is designated an Unrestricted  Subsidiary and shall
exclude  the  fair  market  value  of the  assets  (net of  liabilities)  of any
Unrestricted  Subsidiary  at the  time  that  such  Unrestricted  Subsidiary  is
designated a Restricted  Subsidiary of WCI and (ii) any property  transferred to
or from an Unrestricted  Subsidiary  shall be valued at its fair market value at
the time of such transfer,  in each case as determined by the Board of Directors
in good faith.

                  "Issue  Date"  means  the date on  which  the  Securities  are
originally issued under this Indenture.

                  "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,  any sale with  recourse  against  the seller or any  Affiliate  of the
seller, or any agreement to give any security interest).

                    "March 1997  Equipment  Notes" means the 12 1/2%  Guaranteed
Senior Secured Notes Due 2004 of WinStar Equipment Corp.

                    "March 1997 Notes" means the March 1997 Senior Notes and the
               March 1997 Equipment Notes.

                    "March 1997 Senior Notes" means the 14 1/2% Senior  Deferred
               Interest Notes Due 2005 of WCI.

                  "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


<PAGE>


                                       11


thereof)  when received in the form of cash or cash  equivalents  (except to the
extent  such  obligations  are  financed  or sold  with  recourse  to WCI or any
Restricted Subsidiary of WCI) and proceeds from the conversion of other property
received  when  converted  to  cash or cash  equivalents,  net of (i)  brokerage
commissions and other fees and expenses  (including fees and expenses of counsel
and  investment  bankers)  related to such Asset Sale,  (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 WCI 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 WCI or any Restricted Subsidiary of WCI 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 WCI  or any  Restricted
Subsidiary of WCI) and proceeds from the conversion of other  property  received
when converted to cash or cash equivalents, net of attorneys' 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 by WCI or any of its  subsidiaries as a
result thereof.

                  "Offer to Purchase"  means an offer to purchase  Securities by
the Company  from the Holders  required by Section 4.11 or Section 4.12 which is
commenced  by mailing a notice to the Trustee and each Holder  stating:  (i) the
covenant  pursuant  to which  the  offer is being  made and that all  Securities
validly  tendered  will be accepted  for  payment on a pro rata basis;  (ii) the
purchase  price and the Payment Date;  (iii) that any Security not tendered will
continue to accrue interest pursuant to its terms; (iv) that, unless the Company
defaults in the payment of the purchase price, any Security accepted for payment
pursuant  to the Offer to Purchase  shall cease to accrue  interest on and after
the  Payment  Date;  (v) that  Holders  electing  to have a  Security  purchased
pursuant to the Offer to Purchase  will be required to  surrender  the  Security
together with the form entitled  "Option of the Holder to Elect Purchase" on the
reverse side thereof completed,  to the Paying Agent at the address specified in
the  notice  prior to the close of  business  on the  Business  Day  immediately
preceding the Payment Date; (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
principal amount of Securities  delivered for purchase and a statement that such
Holder is withdrawing his election to have such Securities purchased;  and (vii)
that Holders whose  Securities  are being  purchased only in part will be issued
new Securities  equal in principal  amount (and accrued and unpaid  interest) to
the unpurchased


<PAGE>


                                       12


portion thereof;  provided,  however,  that each Security purchased and each new
Security issued shall be in a principal  amount of $1,000 or integral  multiples
thereof.  On the Payment Date, the Company shall (i) accept for payment on a pro
rata basis any Securities 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  Securities  or portions  thereof so accepted;  and (iii)
deliver,  or cause to be  delivered,  to the Trustee all  Securities or portions
thereof so  accepted  together  with an  Officers'  Certificate  specifying  the
Securities or portions thereof  accepted for payment by the Company.  The Paying
Agent shall  promptly  mail to the  Holders of the  Securities  so accepted  for
payment in an amount equal to the purchase price, and the Trustee shall promptly
authenticate  and mail to such Holders a new Security equal in principal  amount
to any unpurchased  portion of the Securities  surrendered;  provided,  however,
that  each  Security  purchased  and  each  new  Security  issued  shall be in a
principal  amount of $1,000 or integral  multiples  thereof.  The  Company  will
publicly  announce  the results of an Offer to  Purchase as soon as  practicable
after the Payment  Date.  The Trustee shall act as the Paying Agent for an Offer
to Purchase.  The Company 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  Company  is  required  to
repurchase Securities pursuant to an Offer to Purchase.

                  "Officer"  means,  with respect to WCI or the Company,  as the
context requires, (i) the Chairman of the Board, the Vice-Chairman of the Board,
the Chief  Executive  Officer,  the  President,  any Vice  President,  the Chief
Financial  Officer,  and (ii) the Treasurer or any Assistant  Treasurer,  or the
Secretary or any Assistant Secretary.

                  "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. Each Officers' Certificate (other than certificates provided
pursuant to TIA Section 314(a)(4)) shall include the statements  provided for in
TIA Section 314(e).

                  "Old Senior  Notes"  means the 14% Senior  Discount  Notes due
2005 of WCI.

                  "Opinion of Counsel"  means a written  opinion signed by legal
counsel who may be an employee of or counsel to the  Company.  Each such Opinion
of Counsel shall include the statements provided for in TIA Section 314(e).

                  "Paying  Agent" has the  meaning  provided  in  Section  2.03,
except that,  for the purposes of Article  Eight,  the Paying Agent shall not be
the Company or a Subsidiary  of the Company or an Affiliate of any of them.  The
term "Paying Agent" includes any additional Paying Agent.



<PAGE>


                                       13


                  "Payment  Date" means the date of  purchase,  which shall be a
Business  Day no  earlier  than 30 days nor  later  than 60 days from the date a
notice is mailed pursuant to an Offer to Purchase.

                  "Permitted Investment" means (i) an Investment in 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, WCI or a Restricted  Subsidiary;
(ii) Temporary Cash Investments;  (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; (iv) loans or advances to employees
in a principal amount not to exceed $1,000,000 at any one time outstanding;  (v)
stock,  obligations or securities  received in satisfaction  of judgments;  (vi)
Investments,  to the extent that the consideration provided by WCI or any of its
Restricted  Subsidiaries consists solely of Capital Stock (other than Redeemable
Stock) of WCI; (vii) notes payable to WCI that are received by WCI as payment of
the purchase price for Capital Stock (other than  Redeemable  Stock) of WCI; and
(viii)  acquisitions of a minority  equity  interest in entities  engaged in the
telecommunications  business;  provided,  however, that (A) the acquisition of a
majority  equity  interest in such  entities  is not  permitted  under U.S.  law
without FCC consent, (B) WCI or one of its Restricted Subsidiaries has the right
to acquire  Capital  Stock  representing  a majority of the voting  power of the
Voting  Stock of such  entity  upon  receipt of FCC consent and (C) in the event
that such  consent  has not been  obtained  within 18  months  of  funding  such
Investment, WCI or one of its Restricted Subsidiaries has the right to sell such
minority equity interest in the seller thereof for  consideration  consisting of
the  consideration  originally paid by WCI and its Restricted  Subsidiaries  for
such minority equity interest.

                  "Permitted Investor" means William J. Rouhana, Jr.

                  "Permitted  Liens"  means (i) Liens  for  taxes,  assessments,
governmental  charges  or  claims  that are  being  contested  in good  faith by
appropriate legal proceedings  promptly instituted and diligently  conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in conformity with GAAP shall have been made; (ii) statutory or common law Liens
of landlords  and carriers,  warehousemen,  mechanics,  suppliers,  materialmen,
repairmen or other similar Liens arising in the ordinary  course of business and
with respect to amounts not yet  delinquent or being  contested in good faith by
appropriate legal proceedings  promptly instituted and diligently  conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in conformity  with GAAP shall have been made;  (iii) Liens incurred or deposits
made  in  the  ordinary   course  of  business  in   connection   with  workers'
compensation,  unemployment  insurance and other types of social security;  (iv)
Liens  incurred or deposits  made to secure the  performance  of tenders,  bids,
leases,  statutory or regulatory obligations,  bankers' acceptances,  surety and
appeal bonds,  government  contracts,  performance and return-of-money bonds and
other  obligations  of a  similar  nature  incurred  in the  ordinary  course of
business  (exclusive  of  obligations  for the payment of borrowed  money) and a
bank's unexercised right of set-off with respect to


<PAGE>


                                       14


deposits made in the ordinary course;  (v) easements,  rights-of-way,  municipal
and zoning ordinances and similar charges, encumbrances,  title defects or other
irregularities  that do not  materially  interfere  with the ordinary  course of
business of WCI or any of its  Restricted  Subsidiaries;  (vi) Liens  (including
extensions and renewals  thereof) upon real or personal  property acquired after
the Closing Date;  provided,  however,  that (a) such Lien is created solely for
the purpose of securing  Indebtedness  Incurred in accordance  with Section 4.03
either  (1)  to  finance  the  cost   (including  the  cost  of  improvement  or
construction) of the item of property or assets subject thereto and such Lien is
created  prior to, at the time of or within  six  months  after the later of the
acquisition,  the  completion  of  construction  or  the  commencement  of  full
operation of such  property or (2) to refinance any  Indebtedness  previously so
secured,  (b) the principal amount of the Indebtedness secured by such Lien does
not exceed  100% of such cost and (c) any such Lien shall not extend to or cover
any  property  or assets  other  than such item of  property  or assets  and any
improvements on such item;  (vii) leases or subleases  granted to others that do
not  materially  interfere  with the ordinary  course of business of WCI and its
Restricted Subsidiaries,  taken as a whole; (viii) Liens encumbering property or
assets  under  construction  arising  from  progress  or partial  payments  by a
customer of WCI or its  Restricted  Subsidiaries  relating  to such  property or
assets;  (ix) any interest or title of a lessor in the  property  subject to any
Capitalized  Lease or operating  lease;  (x) Liens  arising from filing  Uniform
Commercial Code financing  statements  regarding leases;  (xi) Liens on property
of, or on shares of stock or Indebtedness  of, any  corporation  existing at the
time such corporation becomes, or becomes a part of, any Restricted  Subsidiary;
provided,  however,  that such Liens do not extend to or cover any  property  or
assets of WCI or any  Restricted  Subsidiary  other than the  property or assets
acquired; (xii) Liens in favor of WCI or any Restricted Subsidiary; (xiii) Liens
arising  from the  rendering  of a final  judgment  or order  against WCI or any
Restricted  Subsidiary  of WCI that does not give  rise to an Event of  Default;
(xiv) Liens securing reimbursement obligations with respect to letters of credit
that encumber  documents and other  property  relating to such letters of credit
and the  products  and  proceeds  thereof;  (xv) Liens in favor of  customs  and
revenue  authorities  arising  as a matter of law to secure  payment  of customs
duties in connection  with the  importation  of goods;  (xvi) Liens  encumbering
customary initial deposits and margin deposits,  and other Liens that are either
within the general  parameters  customary  in the  industry  and incurred in the
ordinary course of business,  in each case, securing Indebtedness under Interest
Rate Agreements and Currency Agreements and forward contracts,  options, futures
contracts,  futures options or similar  agreements or  arrangements  designed to
protect WCI or any of its Restricted Subsidiaries from fluctuations in the price
of commodities;  (xvii) Liens arising out of conditional  sale, title retention,
consignment or similar arrangements for the sale of goods entered into by WCI or
any of its  Restricted  Subsidiaries  in the  ordinary  course  of  business  in
accordance with the past practices of WCI and its Restricted  Subsidiaries prior
to the Closing Date; and (xviii) Liens on or sales of receivables.

                  "Person"  means  any  individual,  corporation,   partnership,
limited liability  company,  joint venture,  association,  joint-stock  company,
trust,  unincorporated  organization,  government  or any  agency  or  political
subdivision thereof or any other entity.



<PAGE>


                                       15


                  "Preferred Stock" means,  with respect to any Person,  any and
all shares, interests,  participations or other equivalents (however designated,
whether voting or non-voting)  of such Person's  preferred or preference  stock,
whether  now  outstanding  or issued  after the Issue Date,  including,  without
limitation, all series and classes of such preferred or preference stock.

                  "Principal"  of a debt  security,  including  the  Securities,
means the  principal  amount  due on the Stated  Maturity  as shown on such debt
security.

                  "Protected Property" has the meaning provided in Section 4.09.

                  "Redeemable  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 Stated Maturity of the Securities, (ii) redeemable at the option of
the  holder of such  class or series of  Capital  Stock at any time prior to the
Stated  Maturity of the  Securities  (unless the  redemption  price is, at WCI's
option, without conditions precedent, payable solely in Common Stock (other than
Redeemable  Stock) of WCI) 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 Stated Maturity of the Securities; provided, however, that
any Capital Stock that would not constitute  Redeemable Stock but for provisions
thereof giving holders thereof the right to require such Person to repurchase or
redeem such Capital  Stock upon the  occurrence of an "asset sale" or "change of
control"  occurring  prior to the Stated  Maturity of the  Securities  shall not
constitute  Redeemable  Stock  if  the  "asset  sale"  or  "change  of  control"
provisions applicable to such Capital Stock are no more favorable to the holders
of such Capital  Stock than the  provisions of Section 4.11 and Section 4.12 and
such Capital Stock specifically provides that such Person will not repurchase or
redeem any such stock  pursuant to such provision  prior to WCI's  repurchase of
such Securities as are required to be repurchased  pursuant to the provisions of
Section 4.11 and Section 4.12.

                  "Redemption  Date",  when used with respect to any Security to
be  redeemed,  means the date fixed for such  redemption  by or pursuant to this
Indenture.

                  "Redemption  Price", when used with respect to any Security to
be redeemed,  means the price at which such Security is to be redeemed  pursuant
to this Indenture.

                  "Registrar" has the meaning provided in Section 2.03.

                  "Regular Record Date" for the interest payable on any Interest
Payment  Date means March 1 or September 1 (whether or not a Business  Day),  as
the case may be, next preceding such Interest Payment Date.

                  "Responsible Officer",  when used with respect to the Trustee,
means the chairman or any vice chairman of the board of directors,  the chairman
or any vice chairman of the executive  committee of the board of directors,  the
chairman of the trust committee, the president, any vice


<PAGE>


                                       16


president, any assistant vice president, the secretary, any assistant secretary,
the treasurer,  any assistant treasurer, the cashier, any assistant cashier, any
trust  officer or assistant  trust  officer,  the  controller  or any  assistant
controller or any other officer of the Trustee customarily  performing functions
similar to those  performed  by any of the above  designated  officers  and also
means, with respect to a particular corporate trust matter, any other officer to
whom such matter is referred  because of his or her knowledge of and familiarity
with the particular subject.

               "Restricted Payments" has the meaning provided in Section 4.04.

                    "Restricted  Subsidiary"  means any  Subsidiary of WCI other
               than an Unrestricted Subsidiary.

                    "SEC" means the Securities  and Exchange  Commission and any
               other successor agency.

                  "Securities"  means any of the  securities,  as defined in the
first paragraph of the recitals  hereof,  that are  authenticated  and delivered
under this Indenture.

                  "Securities Act" means the Securities Act of 1933, as amended.

                  "Security  Agreement" means the Security Agreement dated as of
August 1, 1997, between the Company and United States Trust Company of New York,
as collateral agent.

                  "Security  Documents"  means the  Security  Agreement  and any
other  agreements,  instruments  or  documents  entered  into  or  delivered  in
connection  with  any of the  foregoing,  as  such  agreements,  instruments  or
documents may from time to time be amended in  accordance  with the terms hereof
and thereof.

                  "Security Register" has the meaning provided in Section 2.03.

                  "Significant  Subsidiary" means, at any date of determination,
any Restricted  Subsidiary of WCI that, together with its Subsidiaries,  (i) for
the  most  recent  fiscal  year of  WCI,  accounted  for  more  than  10% of the
consolidated  revenues of WCI and its Restricted  Subsidiaries or (ii) as of the
end of such  fiscal  year,  was the owner of more  than 10% of the  consolidated
assets  of WCI and its  Restricted  Subsidiaries,  all as set  forth on the most
recently  available  consolidated  financial  statements  of WCI for such fiscal
year.  Notwithstanding  the  foregoing,  the  Company  shall be  deemed  to be a
"Significant Subsidiary" for all purposes and at all times under this Indenture.

                  "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


<PAGE>


                                       17


interest on any debt  security,  the date specified in such debt security as the
fixed date on which such installment is due and payable.

                  "Subsidiary"   means,   with   respect  to  any  Person,   any
corporation,  association  or  other  business  entity  of  which  Voting  Stock
representing  more than 50% of the voting power of the outstanding  Voting Stock
is  owned,  directly  or  indirectly,  by such  Person  and  one or  more  other
Subsidiaries of such Person.

                    "Subsidiary  Guarantee" has the meaning  provided in Section
               4.07.

                  "Telecommunications  Assets"  means any (i) entity or business
substantially  all  the  revenues  of  which  are  derived  from  (a)  providing
transmission of sound,  data or video; (b) the sale or provision of phone cards,
"800" services,  voice mail, switching,  enhanced  telecommunications  services,
telephone    directory   or   telephone   number    information    services   or
telecommunications  network  intelligence;  or (c)  any  business  ancillary  or
directly  related to the  businesses  referred to in clause (a) or (b) above and
(ii) any assets  used  primarily  to effect  such  transmission  or provide  the
products  or services  referred  to in clause (a) or (b) above and any  directly
related  or  ancillary  assets  including,  without  limitation,   licenses  and
applications,  bids and agreements to acquire  licenses,  or other  authority to
provide transmission services previously granted, or to be granted, by the FCC.

                  "Telecommunications Subsidiary" means (i) WCI Gateway, WinStar
Wireless,  WinStar  Telecommunications,  Inc., WinStar Milliwave,  Inc., WinStar
Locate, Inc., WinStar Wireless Fiber Corp. and, in each case, its successors and
(ii) any other  Restricted  Subsidiary  of WCI that holds more than a de minimis
amount of Telecommunications Assets.

                  "Temporary Cash  Investment"  means any of the following:  (i)
direct  obligations  of the United States or any agency  thereof or  obligations
fully and unconditionally guaranteed by the United States or any agency thereof;
(ii) time deposit  accounts,  certificates  of deposit and money market deposits
maturing within 180 days of the date of acquisition  thereof issued by a bank or
trust company which is organized under the laws of the United States,  any state
thereof or any foreign country  recognized by the United States,  and which bank
or trust  company has capital,  surplus and  undivided  profits  aggregating  in
excess of  $50,000,000  (or the foreign  currency  equivalent  thereof)  and has
outstanding  deposits  or 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 clause (i) above entered
into with a bank meeting the qualifications described in clause (ii) above; (iv)
commercial  paper,  maturing  not  more  than  six  months  after  the  date  of
acquisition,  issued by a corporation (other than an Affiliate of WCI) organized
and in existence  under the laws of the United States,  any state thereof or any
foreign country recognized by the United States with a


<PAGE>


                                       18


rating  at the time as of which  any  investment  therein  is made of "P-1"  (or
higher)  according  to Moody's  Investors  Service,  Inc.  or "A-1" (or  higher)
according to Standard & Poor's Ratings Group; and (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, or by any political  subdivision or taxing authority thereof,  and rated
at least "A" by Standard & Poor's  Ratings Group or Moody's  Investors  Service,
Inc.

                  "TIA" or "Trust  Indenture Act" means the Trust  Indenture Act
of 1939, as amended (15 U.S. Code ss.ss. 77aaa-77bbb),  as in effect on the date
this Indenture was executed, except as provided in Section 9.06.

                  "Transaction  Date" means,  with respect to the  Incurrence of
any  Indebtedness  by WCI 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.

                  "Trustee" means the party named as such in the first paragraph
of  this  Indenture  until  a  successor  replaces  it in  accordance  with  the
provisions  of  Article  Seven  of this  Indenture  and  thereafter  means  such
successor.

                  "United States  Bankruptcy  Code" means the Bankruptcy  Reform
Act of 1978,  as amended and as codified in Title 11 of the United  States Code,
as amended from time to time hereafter, or any successor federal bankruptcy law.

                  "Unrestricted Subsidiary" means (i) any Subsidiary of WCI 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 of WCI (including  any newly  acquired or newly formed  Subsidiary of
WCI), other than a guarantor of the Securities, to be an Unrestricted Subsidiary
unless such  Subsidiary  owns any Capital Stock of, or owns or holds any Lien on
any property  of, WCI or any  Restricted  Subsidiary;  provided,  however,  that
neither  WCI  nor  its  Restricted   Subsidiaries   has  any  Guarantee  of  any
Indebtedness of such Subsidiary  outstanding at the time of such designation and
either (A) the Subsidiary to be so designated has total assets of $1,000 or less
or (B) if such Subsidiary has assets greater than $1,000,  that such designation
would be permitted  under the  provisions of Section 4.04.  Notwithstanding  the
foregoing,  WinStar New Media Company  Inc.,  Non Fiction Films Inc. and WinStar
Global Products, Inc. and their Subsidiaries are Unrestricted Subsidiaries.  The
Board of Directors may designate any Unrestricted  Subsidiary to be a Restricted
Subsidiary of WCI;  provided,  however,  that immediately after giving effect to
such designation (x) WCI could Incur $1.00 of additional  Indebtedness under the
first  paragraph  of Section  4.03 and (y) no Default or Event of Default  shall
have occurred and be continuing.  Any such designation by the Board of Directors
shall be evidenced to the Trustee by promptly  filing with the Trustee a copy of
the  Board  Resolution  giving  effect  to  such  designation  and an  Officers'
Certificate certifying that such designation complied with the foregoing


<PAGE>


                                       19


provisions.   Anything   to   the   contrary   contained   in   this   Indenture
notwithstanding,   no   Telecommunications   Subsidiary  may  be  designated  an
Unrestricted Subsidiary.

                  "U.S.  Government  Obligations"  means securities that are (i)
direct  obligations of the United States of America for the payment of which its
full faith and credit is pledged or (ii)  obligations of a Person  controlled or
supervised by and acting as an agency or instrumentality of the United States of
America the payment of which is  unconditionally  guaranteed as a full faith and
credit  obligation by the United States of America,  which,  in either case, are
not callable or redeemable at the option of the issuer thereof at any time prior
to the Stated  Maturity of the  Securities,  and shall also include a depositary
receipt  issued by a bank or trust company as custodian with respect to any such
U.S. Government  Obligation or a specific payment of interest on or principal of
any such U.S.  Government  Obligation  held by such custodian for the account of
the holder of a depositary receipt; provided,  however, that (except as required
by law) such  custodian is not  authorized to make any deduction from the amount
payable to the holder of such depositary receipt from any amount received by the
custodian in respect of the U.S.  Government  Obligation or the specific payment
of interest on or principal of the U.S. Government  Obligation evidenced by such
depositary receipt.

                  "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.

                  "WCI" means the party named as such in the first  paragraph of
the recitals  hereof  until a successor  replaces it pursuant to Article Five of
this Indenture and thereafter means the successor.

                    "WCI Gateway" means WinStar  Gateway  Network,  Inc. and its
               successors.

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

                  "WinStar Wireless" means WinStar Wireless, Inc.

                   SECTION 1.02.  Incorporation  by Reference of Trust Indenture
Act.  Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated  by reference in and made a part of this  Indenture.  The following
TIA terms used in this Indenture have the following meanings:

                  "indenture securities" means the Securities;



<PAGE>


                                       20


                    "indenture   security   holder"   means   a   Holder   or  a
               Securityholder;

                  "indenture to be qualified" means this Indenture;

                    "indenture  trustee" or  "institutional  trustee"  means the
               Trustee; and

                    "obligor" on the indenture  securities  means the Company or
               any other obligor on the Securities.

                  All other TIA terms used in this Indenture that are defined by
the TIA, defined by TIA reference to another statute or defined by a rule of the
SEC and not otherwise defined herein have the meanings assigned to them therein.

SECTION 1.03. Rules of Construction. Unless the context otherwise requires:

                    (i) a term has the meaning assigned to it;

                    (ii)  an  accounting  term  not  otherwise  defined  has the
               meaning assigned to it in accordance with GAAP;

                    (iii) "or" is not exclusive;

                    (iv) words in the singular include the plural,  and words in
               the plural include the singular;

                    (v) provisions apply to successive events and transactions;

                    (vi)  "herein,"  "hereof" and other words of similar  import
               refer  to this  Indenture  as a whole  and not to any  particular
               Article, Section or other subdivision; and

                    (vii)  all  references  to  Sections  or  Articles  refer to
               Sections  or  Articles  of  this   Indenture   unless   otherwise
               indicated.

                  SECTION 1.04.  Designation  of the  Securities.  The Equipment
Note  Guarantee  shall be  Designated  Senior  Indebtedness  (as  defined in the
Convertible   Notes  Indenture)  for  the  purposes  of  the  Convertible  Notes
Indenture.




<PAGE>


                                       21


                                   ARTICLE TWO
                                 THE SECURITIES

                  SECTION  2.01.  Form and  Dating.  Provisions  relating to the
Initial Securities,  the Private Exchange Securities and the Exchange Securities
are set  forth in the Rule  144A/Regulation  S  Appendix  attached  hereto  (the
"Appendix")  which is hereby  incorporated  in and  expressly  made part of this
Indenture.   The  Initial   Securities   and  the   Trustee's   certificate   of
authentication  shall be  substantially in the form of Exhibit 1 to the Appendix
(with such appropriate insertions, omissions, substitutions and other variations
as are required by this Indenture) which is hereby incorporated in and expressly
made a part of this Indenture.  The Exchange  Securities,  the Private  Exchange
Securities   and  the  Trustee's   certificate   of   authentication   shall  be
substantially  in the  form of  Exhibit  A (with  such  appropriate  insertions,
omissions,   substitutions   and  other  variations  as  are  required  by  this
Indenture),  which is hereby  incorporated  in and expressly made a part of this
Indenture.  The Securities may have notations,  legends or endorsements required
by law, stock exchange rule, agreements to which the Company is subject, if any,
or usage  (provided that any such  notation,  legend or endorsement is in a form
acceptable  to the  Company).  Each  Security  shall  be  dated  the date of its
authentication.  The  terms of the  Securities  set  forth in the  Appendix  and
Exhibit A are part of the terms of this Indenture.

                    SECTION  2.02.  Execution and  Authentication.  Two Officers
               shall sign the  Securities for the Company by manual or facsimile
               signature.

                  If an Officer whose signature is on a Security no longer holds
that office at the time the Trustee  authenticates  the  Security,  the Security
shall be valid nevertheless.

                  A Security shall not be valid until an authorized signatory of
the Trustee  manually signs the certificate of  authentication  on the Security.
The  signature  shall  be  conclusive   evidence  that  the  Security  has  been
authenticated under this Indenture.

                  The Trustee  shall  authenticate  and deliver  Securities  for
original issue upon a written order of the Company signed by two Officers.  Such
order shall  specify the amount of the  Securities to be  authenticated  and the
date on which the  original  issue of  Securities  is to be  authenticated.  The
aggregate principal amount of Securities  outstanding at any time may not exceed
that amount except as provided in Section 2.07.

                  The Trustee may appoint an authenticating  agent acceptable to
the Company to authenticate the Securities.  Unless limited by the terms of such
appointment,  an authenticating  agent may authenticate  Securities whenever the
Trustee may do so. Each  reference in this  Indenture to  authentication  by the
Trustee includes  authentication by such agent. An authenticating  agent has the
same rights as any Registrar or Paying Agent.



<PAGE>


                                       22


                  SECTION 2.03.  Registrar  and Paying Agent.  The Company shall
maintain an office or agency where  Securities may be presented for registration
of transfer or for  exchange  (the  "Registrar")  and an office or agency  where
Securities  may be presented  for payment (the "Paying  Agent").  The  Registrar
shall keep a register of the  Securities and of their transfer and exchange (the
"Security Register").  The Company may have one or more co-registrars and one or
more additional  paying agents.  The term "Paying Agent" includes any additional
paying agent.

                  The Company shall enter into an appropriate  agency  agreement
with any Registrar,  Paying Agent or co-registrar not a party to this Indenture,
which shall  incorporate the terms of the TIA. The agreement shall implement the
provisions of this Indenture that relate to such Agent. The Company shall notify
the Trustee of the name and address of any such Agent.  If the Company  fails to
maintain a Registrar or Paying Agent, the Trustee shall act as such and shall be
entitled to  appropriate  compensation  therefor  pursuant to Section 7.07.  The
Company or any of its domestically  incorporated  Wholly Owned  Subsidiaries may
act as Paying Agent, Registrar, co-registrar or transfer agent.

                  The Company  initially  appoints the Trustee as Registrar  and
Paying Agent in connection with the Securities.

                  SECTION 2.04. Paying Agent To Hold Money in Trust. On or prior
to each due date of the  principal  and  interest on any  Security,  the Company
shall deposit with the Paying Agent a sum  sufficient to pay such  principal and
interest  when so becoming  due.  The Company  shall  require  each Paying Agent
(other than the Trustee) to agree in writing that the Paying Agent shall hold in
trust for the  benefit of  Securityholders  or the Trustee all money held by the
Paying Agent for the payment of principal of or interest on the  Securities  and
shall  notify  the  Trustee  of any  default  by the  Company in making any such
payment. If the Company or a Subsidiary acts as Paying Agent, it shall segregate
the money held by it as Paying Agent and hold it as a separate  trust fund.  The
Company  at any time may  require a Paying  Agent to pay all money held by it to
the Trustee and to account for any funds  disbursed  by the Paying  Agent.  Upon
complying  with this Section,  the Paying Agent shall have no further  liability
for the money delivered to the Trustee.

                  SECTION 2.05. Securityholder Lists. The Trustee shall preserve
in as current a form as is reasonably practicable the most recent list available
to it of the names and addresses of  Securityholders.  If the Trustee is not the
Registrar,  the Company  shall  furnish to the Trustee,  in writing on or before
each interest payment date and at such other times as the Trustee may request in
writing,  a list in such form and as of such date as the Trustee may  reasonably
require of the names and addresses of Securityholders.

                    SECTION 2.06. Transfer and Exchange. The Securities shall be
issued in registered form and shall be transferable only upon the surrender of a
Security for  registration  of transfer.  When  Securities  are presented to the
Registrar or a co-registrar with a request (i) to

<PAGE>


                                       23


register a transfer or (ii) to exchange  them for an equal  principal  amount of
Securities of other denominations,  the Registrar shall register the transfer or
make the transfer,  as requested if the  requirements of Section 8-401(1) of the
Uniform Commercial Code are met; provided,  however, that any Security presented
or surrendered  for  registration of transfer or exchange shall be duly endorsed
or accompanied by a written  instrument of transfer in form  satisfactory to the
Registrar and the Trustee duly executed by the Holder thereof or by his attorney
duly authorized in writing.  To permit  registration of transfers and exchanges,
the Company shall execute and the Trustee shall  authenticate  Securities at the
Registrar's or co-registrar's  request. The Company may require payment of a sum
sufficient  to pay all  taxes,  assessments  or other  governmental  charges  in
connection with any transfer or exchange  pursuant to this Section.  The Company
shall not be required to make and the Registrar  need not register  transfers or
exchanges  of  Securities  selected  for  redemption  (except,  in the  case  of
Securities  to be redeemed in part,  the portion  thereof not to be redeemed) or
any  Securities  for a period of 15 days before a selection of  Securities to be
redeemed or 15 days before an interest payment date.

                  Prior to the due  presentation for registration of transfer of
any Security,  the Company,  the Trustee, the Paying Agent, the Registrar or any
co-registrar  may  deem  and  treat  the  person  in whose  name a  Security  is
registered  as the absolute  owner of such Security for the purpose of receiving
payment of principal of and interest on such Security and for all other purposes
whatsoever,  whether or not such  Security is overdue,  and none of the Company,
the  Trustee,  the Paying  Agent,  the  Registrar or any  co-registrar  shall be
affected by notice to the contrary.

                  All Securities  issued upon any transfer or exchange  pursuant
to the terms of this  Indenture will evidence the same debt and will be entitled
to the same benefits  under this Indenture as the  Securities  surrendered  upon
such transfer or exchange.

                  SECTION 2.07. Replacement Securities.  If a mutilated Security
is surrendered  to the Registrar or if the Holder of a Security  claims that the
Security has been lost,  destroyed or wrongfully  taken, the Company shall issue
and the Trustee shall  authenticate  and deliver a  replacement  Security if the
requirements  of Section  8-405 of the Uniform  Commercial  Code are met and the
Holder satisfies any other reasonable  requirements of the Trustee.  If required
by the Trustee or the  Company,  such Holder  shall  furnish an  indemnity  bond
sufficient  in the  judgment  of the  Company  and the  Trustee to  protect  the
Company,  the Trustee, the Paying Agent, the Registrar and any co-registrar from
any loss which any of them may suffer if a Security is replaced. The Company and
the Trustee may charge the Holder for their expenses in replacing a Security.

                  Every replacement Security is an additional  obligation of the
Company.

                    SECTION 2.08. Outstanding Securities. Securities outstanding
at any time are all  Securities  authenticated  by the Trustee  except for those
canceled by it, those delivered to it for

<PAGE>


                                       24


cancellation and those described in this Section as not outstanding.  A Security
does not cease to be  outstanding  because  the Company or an  Affiliate  of the
Company holds the Security;  provided, however, that, in determining whether the
Holders of the requisite  principal  amount of the  outstanding  Securities have
given any request, demand,  authorization,  direction, notice, consent or waiver
hereunder,  Securities  owned  by the  Company  or any  other  obligor  upon the
Securities  or any  Affiliate of the Company or of such other  obligor  shall be
disregarded  and deemed  not to be  outstanding,  except  that,  in  determining
whether the Trustee shall be protected in relying upon any such request, demand,
authorization,  direction,  notice, consent or waiver, only Securities which the
Trustee knows to be so owned shall be so disregarded.  Securities so owned which
have been  pledged in good faith may be regarded as  outstanding  if the pledgee
establishes  to the  satisfaction  of the Trustee the pledgee's  right so to act
with respect to such  Securities  and that the pledgee is not the Company or any
other  obligor upon the  Securities  or any  Affiliate of the Company or of such
other obligor.

   If a  Security  is  replaced  pursuant  to  Section  2.07,  it  ceases  to be
outstanding  unless the Trustee and the Company  receive proof  satisfactory  to
them that the replaced Security is held by a bona fide purchaser.

                  If  the  Paying  Agent  segregates  and  holds  in  trust,  in
accordance  with this  Indenture,  on a redemption  date or maturity  date money
sufficient to pay all  principal and interest  payable on that date with respect
to the Securities (or portions thereof) to be redeemed or maturing,  as the case
may be, then on and after that date, such Securities (or portions thereof) shall
cease to be outstanding and interest on them shall cease to accrue.

                  SECTION   2.09.   Temporary   Securities.   Until   definitive
Securities are ready for delivery, the Company may prepare and the Trustee shall
authenticate and deliver  temporary  Securities.  Temporary  Securities shall be
substantially in the form of definitive  Securities but may have variations that
the Company and the  Trustee  consider  appropriate  for  temporary  Securities.
Without  unreasonable  delay,  the Company  shall  prepare and the Trustee shall
authenticate  definitive  Securities  and deliver them in exchange for temporary
Securities.

                  SECTION 2.10 Cancellation. The Company at any time may deliver
Securities to the Trustee for  cancellation.  The Registrar and the Paying Agent
shall forward to the Trustee any Securities surrendered to them for registration
of transfer,  exchange or payment.  The Trustee and no one else shall cancel and
destroy (subject to the record  retention  requirements of the Exchange Act) all
Securities  surrendered  for  registration  of  transfer,  exchange,  payment or
cancellation and deliver a certificate of such destruction to the Company unless
the Company directs the Trustee to deliver  canceled  Securities to the Company.
The Company may not issue new Securities to replace  Securities it has redeemed,
paid or delivered to the Trustee for cancellation.



<PAGE>


                                       25


                  SECTION  2.11.  Defaulted  Interest.  If and to the extent the
Company  defaults in a payment of interest on the Securities,  the Company shall
pay defaulted  interest (plus interest on such defaulted  interest to the extent
lawful) in any lawful manner.  The Company may pay the defaulted interest to the
persons who are Securityholders on a subsequent special record date. The Company
shall fix or cause to be fixed any such special  record date and payment date to
the  reasonable  satisfaction  of the  Trustee and shall  promptly  mail to each
Securityholder  a notice that states the special  record date,  the payment date
and the amount of defaulted interest to be paid.

                  SECTION  2.12.  CUSIP  Numbers.  The  Company in  issuing  the
Securities  may use "CUSIP"  numbers (if then  generally in use) and, if so, the
Trustee shall use "CUSIP"  numbers in notices of redemption as a convenience  to
Holders;   provided,   however,   that  any  such   notice  may  state  that  no
representation  is made as to the  correctness of such numbers either as printed
on the  Securities  or as  contained  in any  notice  of a  redemption  and that
reliance may be placed only on the other  identification  numbers printed on the
Securities,  and any such  redemption  shall not be affected by any defect in or
omission of such numbers.


                                  ARTICLE THREE
                                   REDEMPTION

                  SECTION 3.01. Right of Optional Redemption. The Securities may
be redeemed at the election of the Company, in whole at any time or in part from
time to time on or after  March 15,  2002 and prior to  maturity,  upon not less
than 30 nor more than 60 days' prior notice mailed by  first-class  mail to each
Holder's last address as it appears in the Security  Register,  at the following
Redemption Prices (expressed as a percentage of principal amount),  plus accrued
and unpaid  interest,  if any, to the  Redemption  Date (subject to the right of
Holders of record on the relevant Regular Record Date that is on or prior to the
Redemption Date to receive  interest due on the relevant  Interest Payment Date)
if redeemed during the 12-month  period  commencing on March 15 of the years set
forth below:

================================================================================
                 Year                                 Redemption Price
- --------------------------------------------------------------------------------
        2002                                               106.250%
- --------------------------------------------------------------------------------
        2003 and thereafter                                103.125%
================================================================================

                  SECTION  3.02.  Mandatory  Redemption.  In the  event  that by
August 8, 1999,  the Company  shall not have  applied at least $50.0  million to
fund the Acquisition Costs (as defined in Section 4.21) of Designated  Equipment
pursuant to Section 4.21 ($50.0  million less the amount so applied being herein
called the "Unused Equipment Amount"), the Company shall redeem Securities in an
aggregate  principal amount equal to the Unused Equipment Amount at a Redemption
Price of 112.5% of such  principal  amount,  plus  accrued  and unpaid  interest
thereon


<PAGE>


                                       26


to the  Redemption  Date  (subject  to the  right of  Holders  of  record on the
relevant  Regular  Record  Date  that is on or prior to the  Redemption  Date to
receive interest due on the relevant Interest Payment Date).

                  SECTION  3.03.  Notices to Trustee.  If the Company  elects to
redeem  Securities  pursuant  to Section  3.01  hereof or is  required to redeem
Securities  pursuant  to Section  3.02  hereof,  it shall  notify the Trustee in
writing of the Redemption Date (which shall occur no later than August 23, 1999,
in the  case of a  mandatory  redemption  pursuant  to  Section  3.02),  and the
principal  amount of  Securities  to be  redeemed  (which  shall be equal to the
Unused  Equipment  Amount  in the case of a  mandatory  redemption  pursuant  to
section  3.02) plus  interest  accrued and premium due  thereon,  if any, to the
Redemption Date.

                  The  Company  shall  give  each  notice  provided  for in this
Section 3.03 in an Officers'  Certificate  at least five days before mailing the
notice to Holders referred to in Section 3.05.

                  SECTION 3.04. Selection of Securities To Be Redeemed.  If less
than all of the  Securities  are to be redeemed at any time,  the Trustee  shall
select the Securities to be redeemed in compliance with the  requirements of the
principal  national  securities  exchange,  if any, on which the  Securities are
listed or, if the Securities are not listed on a national  securities  exchange,
on a pro rata basis,  by lot or by such other  method as the Trustee in its sole
discretion  shall  deem  fair  and  appropriate;   provided,  however,  that  no
Securities  of $1,000 in  principal  amount or less shall be  redeemed  in part;
provided  further,  however,  that with  respect to  Securities  to be  redeemed
pursuant to Section 3.02, the Trustee shall select the Securities to be redeemed
on a pro rata basis.

                  The  Trustee  shall  make the  selection  from the  Securities
outstanding   and  not   previously   called  for   redemption.   Securities  in
denominations  of $1,000 in principal  amount may only be redeemed in whole. The
Trustee may select for redemption  portions (equal to $1,000 in principal amount
or any integral multiple thereof) of Securities that have  denominations  larger
than $1,000 in principal  amount.  Provisions  of this  Indenture  that apply to
Securities called for redemption also apply to portions of Securities called for
redemption.  The Trustee shall notify the Company and the Registrar  promptly in
writing of the Securities or portions of Securities to be called for redemption.

                  SECTION  3.05.  Notice  of  Redemption.  With  respect  to any
redemption of Securities pursuant to Section 3.01, at least 30 days but not more
than 60 days (or, in the case any redemption of Securities  required pursuant to
Section  3.02,  at least 10 Business  Days but not more than 15  Business  Days)
before a Redemption Date, the Company shall mail a notice of redemption by first
class mail to each Holder whose Securities are to be redeemed.

                  The notice shall  identify the  Securities  to be redeemed and
shall state:



<PAGE>


                                       27


                    (a) the Redemption Date;

                    (b) the Redemption Price;

                    (c) the name and address of the Paying Agent;

                    (d)  that   Securities   called  for   redemption   must  be
               surrendered   to  the  Paying  Agent  in  order  to  collect  the
               Redemption Price;

                    (e)  that,   unless  the  Company  defaults  in  making  the
               redemption payment,  interest on Securities called for redemption
               ceases to accrue  on and after the  Redemption  Date and the only
               remaining  right of the  Holders  is to  receive  payment  of the
               Redemption  Price plus accrued  interest to the  Redemption  Date
               upon surrender of the Securities to the Paying Agent;

                    (f) that,  if any  Security is being  redeemed in part,  the
               portion of the  principal  amount  (equal to $1,000 in  principal
               amount or any integral  multiple  thereof) of such Security to be
               redeemed  and  that,  on and  after  the  Redemption  Date,  upon
               surrender  of such  Security,  a new  Security or  Securities  in
               principal amount equal to the unredeemed  portion thereof will be
               reissued;

                    (g) the paragraph of the Securities (i.e.,  either paragraph
               5 or 6) pursuant to which the  Securities  called for  redemption
               are being redeemed; and

                    (h)  that,  if any  Security  contains  a  CUSIP  number  as
               provided in Section 2.12, no  representation  is being made as to
               the  correctness  of the CUSIP  number  either as  printed on the
               Securities or as contained in the notice of  redemption  and that
               reliance may be placed only on the other  identification  numbers
               printed on the Securities.

                  At the Company's  request (which request may be revoked by the
Company at any time prior to the time at which the Trustee shall have given such
notice to the Holders), made in writing to the Trustee at least five days before
mailing the notice to the Holders referred to in Section 3.05, the Trustee shall
give such notice of  redemption  in the name and at the expense of the  Company.
If,  however,  the Company  gives such notice to the Holders,  the Company shall
concurrently  deliver to the Trustee an Officers'  Certificate stating that such
notice has been given.

                  SECTION 3.06.  Effect of Notice of Redemption.  Once notice of
redemption is mailed, Securities called for redemption become due and payable on
the relevant  Redemption Date and at the Redemption Price. Upon surrender of any
Securities to the Paying Agent,  such Securities shall be paid at the Redemption
Price, plus accrued interest, if any, to the Redemption Date.



<PAGE>


                                       28


                  Notice of redemption  shall be deemed to be given when mailed,
whether or not the Holder  receives  the notice.  In any event,  failure to give
such  notice,  or any  defect  therein,  shall not affect  the  validity  of the
proceedings for the redemption of Securities held by Holders to whom such notice
was properly given.

                  SECTION 3.07.  Deposit of Redemption Price. On or prior to any
Redemption  Date,  the Company  shall  deposit with the Paying Agent (or, if the
Company is acting as its own Paying Agent,  shall segregate and hold in trust as
provided in Section 2.04) money  sufficient to pay the  Redemption  Price of and
accrued  interest  on all  Securities  to be  redeemed  on that date  other than
Securities or portions thereof called for redemption on that date that have been
delivered by the Company to the Trustee for cancellation.

                  SECTION 3.08. Payment of Securities Called for Redemption.  If
notice of redemption has been given in the manner provided above, the Securities
or portion of  Securities  specified in such notice to be redeemed  shall become
due and payable on the Redemption  Date at the Redemption  Price stated therein,
together with accrued  interest to such  Redemption  Date, and on and after such
date (unless the Company shall default in the payment of such  Securities at the
Redemption  Price and accrued interest to the Redemption Date, in which case the
principal,  until paid, shall bear interest from the Redemption Date at the rate
prescribed in the  Securities),  such Securities shall cease to accrue interest.
Upon  surrender of any Security for  redemption in  accordance  with a notice of
redemption,  such  Security  shall be paid and  redeemed  by the  Company at the
Redemption  Price,  together with accrued  interest,  if any, to the  Redemption
Date; provided,  however, that installments of interest whose Stated Maturity is
on or prior to the Redemption Date shall be payable to the Holders registered as
such at the close of business on the relevant Regular Record Date.

                  SECTION 3.09.  Securities  Redeemed in Part. Upon surrender of
any Security that is redeemed in part, the Company shall execute and the Trustee
shall  authenticate  and deliver to the Holder a new Security equal in principal
amount to the unredeemed portion of such surrendered Security.


                                  ARTICLE FOUR
                                    COVENANTS

                  SECTION 4.01. Payment of Securities. The Company shall pay the
principal of,  premium,  if any, and interest on the Securities on the dates and
in the manner provided in the Securities and this  Indenture.  An installment of
principal, premium, if any, or interest shall be considered paid on the date due
if the Trustee or Paying  Agent (other than the  Company,  a  Subsidiary  of the
Company,  or any  Affiliate of any of them) holds on that date money  designated
for and sufficient to pay the  installment.  If the Company or any Subsidiary of
the  Company  or  any  Affiliate  of any of  them,  acts  as  Paying  Agent,  an
installment of principal, premium, if any,


<PAGE>


                                       29


or interest  shall be  considered  paid on the due date if the entity  acting as
Paying Agent  complies with Section 2.04. As provided in Section 6.09,  upon any
bankruptcy  or  reorganization  procedure  relative to the Company,  the Trustee
shall  serve  as the  Paying  Agent  and  conversion  agent,  if  any,  for  the
Securities.

                  The Company shall pay interest on overdue principal,  premium,
if any, and interest on overdue installments of interest,  to the extent lawful,
at the rate per annum specified in the Securities.

                  SECTION  4.02.  Maintenance  of Office or Agency.  The Company
will  maintain  an  office  or agency  (which  may be an office of the  Trustee,
Registrar or co-registrar or any Affiliate of any of them) where  Securities may
be surrendered for  registration of transfer or exchange or for presentation for
payment  and where  notices and demands to or upon the Company in respect of the
Securities  and this  Indenture  may be served.  The  Company  will give  prompt
written  notice to the Trustee of the location,  and any change in the location,
of such office or agency.  If at any time the Company shall fail to maintain any
such  required  office or agency or shall fail to furnish the  Trustee  with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the address of the Trustee set forth in Section 12.02.

                  The Company may also from time to time  designate  one or more
other offices or agencies  where the  Securities may be presented or surrendered
for  any  or  all  such  purposes  and  may  from  time  to  time  rescind  such
designations.  The Company will give prompt written notice to the Trustee of any
such  designation  or  rescission  and of any change in the location of any such
other office or agency.

                  The Company hereby  initially  designates the Corporate  Trust
Office of the  Trustee,  located in the  Borough of  Manhattan,  the City of New
York, as such office of the Company in accordance with Section 2.03.

                  SECTION 4.03.  Limitation on  Indebtedness.  (a) WCI will not,
and  will  not  permit  any  of  its  Restricted   Subsidiaries  to,  Incur  any
Indebtedness  (other than the Securities and Indebtedness  existing on the Issue
Date);  provided,  however,  that WCI may Incur  Indebtedness  if,  after giving
effect to the Incurrence of such Indebtedness and the receipt and application of
the proceeds  therefrom,  the Indebtedness to EBITDA Ratio would be greater than
zero and less than 5:1.

                  Notwithstanding   the   foregoing,   WCI  and  any  Restricted
Subsidiary (except as specified below) may Incur each and all of the following:

                  (i)  Indebtedness  of  WCI  outstanding  at  any  time  in  an
         aggregate principal amount not to exceed $125,000,000,  less any amount
         of  Indebtedness  Incurred  pursuant to this clause (i) and permanently
         repaid as provided under Section 4.11;


<PAGE>


                                       30



                  (ii)  Indebtedness  (A) to WCI evidenced by an  unsubordinated
         promissory note or (B) to any of its Restricted Subsidiaries; provided,
         however, that 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 WCI or another Restricted  Subsidiary)
         shall be deemed,  in each case,  to  constitute  an  Incurrence of such
         Indebtedness not permitted by this clause (ii);

                  (iii) 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), (ii),
         (v), (vi) or (viii) 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, however, that
         Indebtedness  the proceeds of which are used to refinance or refund the
         Securities or Indebtedness  that is pari passu with, or subordinated in
         right of  payment  to,  the  Equipment  Note  Guarantee  shall  only be
         permitted  under this clause  (iii) if (A) in case the  Securities  are
         refinanced in part or the  Indebtedness  to be refinanced is pari passu
         with the Equipment Note Guarantee, such new Indebtedness,  by its terms
         or by the terms of any agreement or  instrument  pursuant to which such
         new Indebtedness is outstanding,  is expressly made pari passu with, or
         subordinate in right of payment to, the Equipment Note  Guarantee,  (B)
         in case the  Indebtedness  to be refinanced is subordinated in right of
         payment to the Equipment Note Guarantee, such new Indebtedness,  by its
         terms or by the terms of any agreement or instrument  pursuant to which
         such new Indebtedness is outstanding,  is expressly made subordinate in
         right of payment to the Equipment Note Guarantee at least to the extent
         that the Indebtedness to be refinanced is subordinated to the Equipment
         Note Guarantee and (C) such new Indebtedness, determined as of the date
         of  Incurrence of such new  Indebtedness,  does not mature 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;  provided further, however, that in no event may Indebtedness
         of WCI be refinanced  by means of any  Indebtedness  of any  Restricted
         Subsidiary of WCI pursuant to this clause (iii);

                  (iv)  Indebtedness  (A) in respect of  performance,  surety or
         appeal  bonds  provided in the ordinary  course of business,  (B) under
         Currency  Agreements and Interest Rate Agreements;  provided,  however,
         that such  agreements do not increase the  Indebtedness  of the obligor
         outstanding  at any time  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 WCI or any of
         the Restricted  Subsidiaries  pursuant to such agreements,  in any case
         Incurred in connection with the disposition of any business,  assets or
         Restricted  Subsidiary of WCI (other than  Guarantees  of  Indebtedness
         Incurred by any Person acquiring all or any portion of such business,


<PAGE>


                                       31


         assets or  Restricted  Subsidiary  of WCI for the purpose of  financing
         such  acquisition),  in a  principal  amount  not to  exceed  the gross
         proceeds  actually  received  by WCI or any  Restricted  Subsidiary  in
         connection with such disposition;

                  (v)  Indebtedness  of WCI  not to  exceed,  at  any  one  time
         outstanding,  two times the Net Cash Proceeds  received by WCI from and
         after October 23, 1995, from the issuance and sale of its Capital Stock
         (other than Redeemable  Stock and Preferred Stock that provides for the
         payment  of  dividends   in  cash);   provided,   however,   that  such
         Indebtedness  (x) does not mature  prior to the Stated  Maturity of the
         Securities  and has an Average Life longer than the  Securities and (y)
         is  subordinated to the Equipment Note Guarantee at least to the extent
         that the Convertible Notes are subordinated to Senior  Indebtedness (as
         defined in the Convertible  Notes Indenture as in effect on the Closing
         Date);

                  (vi)  Indebtedness  of  any  Restricted   Subsidiary  Incurred
         pursuant  to any credit  agreement  of such  Restricted  Subsidiary  in
         effect on the Issue Date (and refinancings  thereof),  up to the amount
         of the commitment under such credit agreement on the Issue Date;

                  (vii)  Indebtedness to the extent such Indebtedness is secured
         by Liens  which are  purchase  money or other Liens upon  equipment  or
         inventory acquired or held by WCI or any of its Restricted Subsidiaries
         taken or  obtained  by (A) the  seller or lessor of such  equipment  or
         inventory  to  secure  all or a part of the  purchase  price  or  lease
         payments  therefor  or (B) the  person  who  makes  advances  or incurs
         obligations,  thereby  giving  value to WCI to enable it to purchase or
         acquire rights in such equipment or inventory,  to secure the repayment
         of all or a part of the  advances so made or  obligations  so incurred;
         provided,  however,  that  such  Liens do not  extend  to or cover  any
         property or assets of WCI or any Restricted  Subsidiary  other than the
         equipment or inventory acquired;

                  (viii)  Indebtedness  of  any  Restricted  Subsidiary  not  to
         exceed, at any one time outstanding, 80% of the accounts receivable net
         of  reserves  and  allowances  for  doubtful  accounts,  determined  in
         accordance with GAAP, of such Restricted  Subsidiary and its Restricted
         Subsidiaries  (without  duplication);   provided,  however,  that  such
         Indebtedness  is not  Guaranteed  by  WCI  or  any  of  its  Restricted
         Subsidiaries; and

                (ix) Indebtedness of WCI, to the extent the proceeds thereof are
         immediately used to purchase Convertible Notes, Old Senior Notes, March
         1997 Notes or  Securities  tendered in an Offer to  Purchase  made as a
         result of a Change of Control.

                  (b) For  purposes  of  determining  any  particular  amount of
Indebtedness  under this Section 4.03,  Guarantees,  Liens or  obligations  with
respect to letters of credit supporting  Indebtedness  otherwise included in the
determination of such particular amount shall not be


<PAGE>


                                       32


included.  For purposes of determining compliance with this Section 4.03, 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,  WCI,  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.

                  (c)  WCI  will  not,  and  will  not  permit  any   Restricted
Subsidiary  to,  Incur  any  Guarantee  of  Indebtedness  of  any   Unrestricted
Subsidiary.

                  SECTION 4.04. Limitation on Restricted Payments. WCI will not,
and will not permit any Restricted  Subsidiary to,  directly or indirectly,  (i)
declare or pay any dividend or make any distribution on its Capital Stock (other
than  dividends  or  distributions  payable  solely  in  shares  of its or  such
Restricted Subsidiary's Capital Stock (other than Redeemable Stock) held by such
holders  or in  options,  warrants  or other  rights to acquire  such  shares of
Capital  Stock)  other  than  such  Capital  Stock  held  by  WCI  or any of its
Restricted  Subsidiaries  (and other than pro rata dividends or distributions on
Common Stock of Restricted  Subsidiaries);  (ii) repurchase,  redeem,  retire or
otherwise  acquire  for value  any  shares of  Capital  Stock of WCI  (including
options,  warrants or other rights to acquire such shares of Capital Stock) held
by Persons other than any Wholly Owned  Restricted  Subsidiaries  of WCI;  (iii)
make any  voluntary  or optional  principal  payment,  or  voluntary or optional
redemption,  repurchase,  defeasance,  or other  acquisition  or retirement  for
value,  of  Indebtedness  of WCI that is subordinated in right of payment to the
Equipment Note Guarantee;  or (iv) make any  Investment,  other than a Permitted
Investment,  in any Person  (such  payments or any other  actions  described  in
clauses (i) through (iv) being  collectively  "Restricted  Payments") if, at the
time of, and after giving  effect to, the  proposed  Restricted  Payment:  (A) a
Default or Event of Default  shall have occurred and be  continuing,  (B) except
with  respect to any  Investment  (other than an  Investment  consisting  of the
designation of a Restricted Subsidiary as an Unrestricted Subsidiary), WCI could
not Incur at least $1.00 of  Indebtedness  under the first  paragraph of Section
4.03 or (C) the  aggregate  amount  expended for all  Restricted  Payments  (the
amount so expended, 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) 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 Income is a loss,  minus 100% of such amount)  (determined  by
excluding  income  resulting  from  transfers  of assets by WCI 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 filed  pursuant to Section 4.18 plus (2) the  aggregate  Net Cash  Proceeds
received by WCI after the Closing Date from the  issuance and sale  permitted by
this  Indenture of its Capital Stock (other than  Redeemable  Stock) to a Person
who is not a  Subsidiary  of WCI, or from the  issuance to a Person who is not a
Subsidiary  of WCI of any options,  warrants or other rights to acquire  Capital
Stock  of  WCI  (in  each  case,  exclusive  of  any  convertible  Indebtedness,
Redeemable 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 Stated


<PAGE>


                                       33


Maturity of the  Securities)  plus (3) an amount  equal to the net  reduction in
Investments  (other than  reductions  in  Permitted  Investments  and other than
reductions in  Investments  made pursuant to clauses (vi) or (vii) of the second
paragraph  of this  Section  4.04) 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 WCI or any Restricted Subsidiary (except to
the  extent  any  such  payment  is  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 the amount of Investments  previously made by WCI
and its Restricted Subsidiaries in such Person.

                  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,   defeasance   or  other
         acquisition   or  retirement   for  value  of   Indebtedness   that  is
         subordinated  in right of  payment  to the  Equipment  Note  Guarantee,
         including  premium,  if any, and accrued and unpaid interest,  with the
         proceeds of, or in exchange  for,  Indebtedness  Incurred  under clause
         (iii) of the second paragraph of Section 4.03;

                  (iii)  the  repurchase,  redemption  or other  acquisition  of
         Capital  Stock of WCI (or options,  warrants or other rights to acquire
         such  Capital  Stock) in  exchange  for,  or out of the  proceeds  of a
         substantially  concurrent  sale of, shares of Capital Stock or options,
         warrants or other rights to purchase  such Capital  Stock (in each case
         other than Redeemable Stock) of WCI;

                  (iv)  the  making  of any  other  Restricted  Payment  made by
         exchange  for, or out of the  proceeds of, a  substantially  concurrent
         sale of,  shares of the  Capital  Stock or  options,  warrants or other
         rights  to  acquire  such  Capital  Stock  (in  each  case  other  than
         Redeemable Stock) of the Company;

                  (v) payments or  distributions,  in the nature of satisfaction
         of   dissenters'   rights,   pursuant  to  or  in  connection   with  a
         consolidation,  merger or  transfer of assets  that  complies  with the
         provisions of this Indenture applicable to mergers,  consolidations and
         transfers  of all or  substantially  all of the  property and assets of
         WCI;

                    (vi) Investments,  not to exceed $15,000,000 at any one time
               outstanding;

                    (vii) Investments, not to exceed $15,000,000 at any one time
               outstanding,  in  entities,  substantially  all of the  assets of
               which consist of Telecommunications Assets;

<PAGE>


                                       34



                  (viii) (A) cash payments in lieu of the issuance of fractional
         shares of Common Stock upon conversion (including mandatory conversion)
         of  the  Convertible  Notes  provided  for  in  the  Convertible  Notes
         Indenture and (B) cash payments on the Convertible Notes required to be
         made under  Section  4.12 and  Section  4.13 in the  Convertible  Notes
         Indenture (as in effect on the Closing Date);

                  (ix)  cash  payments  in lieu of the  issuance  of  fractional
         shares of Common Stock of WCI upon conversion of any class of Preferred
         Stock of WCI;  provided,  however,  that  this  exception  shall not be
         available with respect to more than two such  conversions  with respect
         to any such class of Preferred Stock by any given Affiliate of WCI; and

                  (x)  Investments  in entities  that  directly  (or  indirectly
         through  subsidiaries)  own  licenses  granted  by the FCC or any other
         governmental   entity  with   authority  to  grant   telecommunications
         licenses;  provided,  however,  that,  in each case WCI or a Restricted
         Subsidiary shall, at the time of making such Investment, have an active
         role in the management or operation of such entity and in the provision
         of telecommunications services by such entity;

provided,  however,  that,  except in the case of clauses  (i) and (iii) of this
paragraph,  no Default or Event of Default shall have occurred and be continuing
or occur as a  consequence  of the actions or  payments  set forth  herein.  Any
Investments made other than in cash shall be valued, in good faith, by the Board
of  Directors.  Any  Investment  made  pursuant  to clause (vi) or (vii) of this
paragraph  shall be deemed to be no longer  outstanding  (and repaid in full) if
and when the  Person in which  such  Investment  is made  becomes  a  Restricted
Subsidiary of WCI.

                  Each Restricted  Payment  permitted  pursuant to the preceding
paragraph  (other  than  the  Restricted  Payment  referred  to in  clause  (ii)
thereof),  and the Net Cash Proceeds from any issuance and sale of Capital Stock
referred to in clauses  (iii) or (iv) shall be included in  calculating  whether
the  conditions  of clause (C) of the first  paragraph of this Section 4.04 have
been met with respect to any subsequent  Restricted  Payments.  In the event the
proceeds  of an issuance  of Capital  Stock of WCI are used for the  redemption,
repurchase or other  acquisition of the Securities or Indebtedness  that is pari
passu with the  Equipment  Note  Guarantee  then the Net Cash  Proceeds  of such
issuance shall be included in clause (C) of the first  paragraph of this Section
4.04  only to the  extent  such  proceeds  are not  used  for  such  redemption,
repurchase or other acquisition of Indebtedness.

                    SECTION  4.05.  Limitation  on  Dividend  and Other  Payment
Restrictions  Affecting  Restricted  Subsidiaries.  WCI will  not,  and will not
permit any Restricted Subsidiary to, create

<PAGE>


                                       35


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 WCI or any other Restricted Subsidiary;

                    (ii)  pay  any  Indebtedness   owed  to  WCI  or  any  other
               Restricted  Subsidiary  that owns,  directly or  indirectly,  any
               Capital Stock of such Restricted Subsidiary;

                    (iii) make loans or advances to WCI or any other  Restricted
               Subsidiary that owns,  directly or indirectly,  any Capital Stock
               of such Restricted Subsidiary; or

                    (iv)  transfer  any of its  property or assets to WCI or any
               other  Restricted  Subsidiary that owns,  directly or indirectly,
               any Capital Stock of such Restricted Subsidiary.

                  The foregoing  provisions  shall not prohibit any encumbrances
or restrictions:

                  (i) existing on the Issue Date in this  Indenture or any other
         agreement   in  effect  on  the  Issue   Date,   and  any   extensions,
         refinancings,  renewals or replacements of such  agreements;  provided,
         however, 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;

                  (iii)  existing  with respect to any Person or the property or
         assets of such Person acquired by WCI or any Restricted Subsidiary,  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 4.05, (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 WCI or any
         Restricted Subsidiary not otherwise prohibited by this Indenture or (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


<PAGE>


                                       36


          from  the  value  of  property  or  assets  of WCI  or any  Restricted
          Subsidiary in any manner material to WCI or any Restricted Subsidiary;
          or

                  (v)  with  respect  to a  Restricted  Subsidiary  and  imposed
         pursuant to an  agreement  that has been  entered  into for the sale or
         disposition  of all or  substantially  all of the Capital  Stock of, or
         property and assets of, such Restricted Subsidiary.

Nothing  contained  in this  Section  4.05 shall  prevent WCI or any  Restricted
Subsidiary  from (i)  restricting  the sale or other  disposition of property or
assets of WCI or any of its Restricted  Subsidiaries that secure Indebtedness of
WCI or any of its Restricted Subsidiaries or (ii) creating,  incurring, assuming
or suffering to exist any Liens otherwise permitted under Section 4.09.

                  SECTION  4.06.  Limitation on the Issuance of Capital Stock of
Restricted  Subsidiaries.  WCI will not sell, and will 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 WCI or a Wholly Owned Restricted Subsidiary;

                    (ii)  issuances  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; or

                    (iv)  issuances  or sales  of  Common  Stock  of  Restricted
               Subsidiaries,  other than the Telecommunications Subsidiaries, if
               within  six  months of each such  issuance  or sale,  WCI or such
               Restricted  Subsidiary  applies  an amount  not less than the Net
               Cash Proceeds  thereof (if any) in accordance  with clause (A) or
               (B) of the first paragraph of Section 4.11.

     SECTION   4.07.   Limitation  on  Issuances  of  Guarantees  by  Restricted
Subsidiaries.  WCI  will not  permit  any  Restricted  Subsidiary,  directly  or
indirectly,  to Guarantee any Indebtedness of WCI  ("Guaranteed  Indebtedness"),
unless (i) such  Restricted  Subsidiary  simultaneously  executes and delivers a
supplemental   indenture  to  this  Indenture   providing  for  a  Guarantee  (a
"Subsidiary  Guarantee")  of  payment  of  the  Securities  by  such  Restricted
Subsidiary and (ii) such Restricted Subsidiary waives and will not in any manner
whatsoever   claim  or  take  the  benefit  or  advantage   of,  any  rights  of
reimbursement,  indemnity or  subrogation or any other rights against WCI or any
other  Restricted  Subsidiary  as a result  of any  payment  by such  Restricted
Subsidiary  under  its  Subsidiary  Guarantee;   provided,  however,  that  this
paragraph shall not be applicable to any Guarantee of any Restricted  Subsidiary
that (x) existed at the time such Person became a Restricted  Subsidiary and (y)
was not  Incurred  in  connection  with,  or in  contemplation  of,  such Person
becoming a Restricted Subsidiary. If the Guaranteed Indebtedness
[NYCORP2:409141.3:4605B:08/08/97--3:52a]

<PAGE>


                                       37


is (A) pari passu with the Equipment Note Guarantee,  then the Guarantee of such
Guaranteed  Indebtedness  shall be pari  passu  with,  or  subordinated  to, the
Subsidiary  Guarantee or (B)  subordinated  to the Equipment Note Guarantee then
the  Guarantee of such  Guaranteed  Indebtedness  shall be  subordinated  to the
Subsidiary Guarantee at least to the extent that the Guaranteed  Indebtedness is
subordinated to the Equipment Note Guarantee.

                  Notwithstanding the foregoing,  any Subsidiary  Guarantee by a
Restricted  Subsidiary shall provide by its terms that it shall be automatically
and  unconditionally  released  and  discharged  upon (i) any sale,  exchange or
transfer,  to any  Person  not an  Affiliate  of WCI of all of  WCI's  and  each
Restricted Subsidiary's Capital Stock in, or all or substantially all the assets
of,  such  Restricted  Subsidiary  (which  sale,  exchange  or  transfer  is not
prohibited by this  Indenture) or (ii) the release or discharge of the Guarantee
which resulted in the creation of such Subsidiary Guarantee,  except a discharge
or release by or as a result of payment under such Guarantee.

                  SECTION 4.08. Limitation on Transactions with Shareholders and
Affiliates.  WCI will not,  and will 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 holder (or any  Affiliate  of such
holder) of 5% or more of any class of Capital Stock of WCI or with any Affiliate
of WCI or any Restricted  Subsidiary,  except upon fair and reasonable  terms no
less favorable to WCI 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 such a holder or
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 WCI or a Restricted  Subsidiary delivers
to the Trustee a written opinion of a nationally  recognized  investment banking
firm stating that the transaction is fair to WCI or such  Restricted  Subsidiary
from a financial point of view; (ii) any transaction  solely between WCI and any
of its Wholly  Owned  Restricted  Subsidiaries  or solely  between  Wholly Owned
Restricted  Subsidiaries;  (iii) the payment of reasonable  fees to directors of
WCI who are not  employees  of WCI;  (iv) any  payments  or  other  transactions
pursuant to any  tax-sharing  agreement  between  WCI and any other  Person with
which  WCI  files a  consolidated  tax  return  or with  which  WCI is part of a
consolidated  group  for  tax  purposes;  or (v)  any  Restricted  Payments  not
prohibited by the provisions of Section 4.04 (other than pursuant to clause (iv)
of the  definition  of  "Permitted  Investment"  or  clause  (vi) of the  second
paragraph of Section  4.04).  Notwithstanding  the  foregoing,  any  transaction
covered by the first  paragraph  of this Section 4.08 and not covered by clauses
(ii) through  (iv) of this  paragraph,  the  aggregate  amount of which  exceeds
$250,000  in value,  must be  approved  or  determined  to be fair in the manner
provided for in clause (i)(A) or (B) above.



<PAGE>


                                       38


                  SECTION 4.09.  Limitation on Liens. WCI will not, and will not
permit any Restricted  Subsidiary to, create,  incur,  assume or suffer to exist
any Lien on any of its assets or properties of any  character,  or any shares of
Capital  Stock  or  Indebtedness  of any  Restricted  Subsidiary  (collectively,
"Protected Property"), without making effective provision for the Equipment Note
Guarantee and all other amounts due under this Indenture to be directly  secured
equally and ratably  with (or, if the  obligation  or liability to be secured by
such Lien is  subordinated  in right of payment to the Equipment  Note Guarantee
prior to) the obligation or liability secured by such Lien.

                  The foregoing limitation does not apply to:

               (i) Liens existing on the Issue Date;

               (ii) Liens  granted after the Issue Date on any assets or Capital
          Stock of WCI or its  Restricted  Subsidiaries  created in favor of the
          Holders;

               (iii) Liens with respect to the assets of a Restricted Subsidiary
          granted  by  such  Restricted  Subsidiary  to  WCI or a  Wholly  Owned
          Restricted  Subsidiary  to  secure  Indebtedness  owing to WCI or such
          other Restricted Subsidiary;

               (iv) Liens securing  Indebtedness  which is Incurred to refinance
          secured  Indebtedness  which is permitted to be Incurred  under clause
          (iii) of the second paragraph of Section 4.03; provided, however, that
          such Liens do not extend to or cover any  property or assets of WCI or
          any Restricted  Subsidiary  other than the property or assets securing
          the Indebtedness being refinanced;

               (v) Liens securing  Indebtedness  Incurred  pursuant to the first
          sentence of Section 4.03;

               (vi)  purchase  money or other Liens upon  equipment or inventory
          acquired or held by WCI or any of its Restricted Subsidiaries taken or
          obtained by (A) the seller or lessor of such equipment or inventory to
          secure all or a part of the purchase price or lease payments  therefor
          or (B) the person who makes  advances or incurs  obligations,  thereby
          giving value to WCI to enable it to purchase or acquire rights in such
          equipment or  inventory,  to secure the  repayment of all or a part of
          the advances so made or  obligations so incurred;  provided,  however,
          that such  Liens do not extend to or cover any  property  or assets of
          WCI or any Restricted Subsidiary other than the equipment or inventory
          acquired; or

               (vii) Permitted Liens.




<PAGE>


                                       39


                  SECTION 4.10. Limitation on Sale-Leaseback  Transactions.  WCI
will not,  and will not  permit any  Restricted  Subsidiary  to,  enter into any
sale-leaseback transaction involving any of its assets or properties whether now
owned or hereafter  acquired,  whereby WCI or a Restricted  Subsidiary  sells or
transfers such assets or properties and then or thereafter leases such assets or
properties  or any part thereof or any other assets or  properties  which WCI or
such Restricted Subsidiary, as the case may be, intends to use for substantially
the same purpose or purposes as the assets or properties sold or transferred.

                  The foregoing restriction does not apply to any sale-leaseback
transaction if:

               (i) the lease is for a period,  including  renewal rights, of not
          in excess of three years;

               (ii) the lease  secures  or  relates  to  industrial  revenue  or
          pollution control bonds;

               (iii) the  transaction is solely between WCI and any Wholly Owned
          Restricted  Subsidiary  or  solely  between  Wholly  Owned  Restricted
          Subsidiaries;

               (iv) the assets or properties  are sold and leased back within 30
          days  of the  date  that  the  account  payable  with  respect  to the
          acquisition  by WCI or any  Restricted  Subsidiary  of such  assets or
          properties is due and payable; or

               (v) WCI or such  Restricted  Subsidiary,  within six months after
          the sale or transfer of any assets or properties is completed, applies
          an amount not less than the net  proceeds  received  from such sale in
          accordance  with clause (A) or (B) of the first  paragraph  of Section
          4.11.

                  SECTION  4.11.  Limitation  on Asset Sales.  WCI will not, and
will not permit any Restricted  Subsidiary to, consummate any Asset Sale, unless
(i) the consideration  received by WCI or such Restricted Subsidiary is at least
equal to the fair  market  value of the assets  sold or  disposed of and (ii) at
least 85% of the  consideration  received  consists  of cash or  Temporary  Cash
Investments.  In the event and to the extent that the Net Cash Proceeds received
by WCI or 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 WCI and its  Subsidiaries  has been prepared),  then WCI shall or shall cause
the relevant  Restricted  Subsidiary to (i) within six 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  unsubordinated  Indebtedness  of WCI, or  Indebtedness  of any Restricted
Subsidiary,  in  each  case  owing  to a  Person  other  than  WCI 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 six months after


<PAGE>


                                       40


the date of such  agreement),  in property or assets of a nature or type or that
are used in a business (or in a company  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,  WCI 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
six-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  4.11.  The amount of such excess Net Cash  Proceeds
required to be applied (or to be committed to be applied)  during such six-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 4.11 totals at least  $10,000,000,  WCI or the Company
must commence,  not later than the 15th Business Day after the first day of such
month,  and consummate an Offer to Purchase from the Holders on a pro rata basis
an aggregate principal amount of Securities equal to the Excess Proceeds on such
date,  at a  purchase  price  equal  to 101%  of the  principal  amount  of such
Securities on such date of purchase,  plus accrued and unpaid  interest (if any)
on such amount to the date of purchase.

                  Notwithstanding  the foregoing,  the Company will not, and WCI
will not permit the Company to,  consummate any Asset Sale of Collateral  unless
(A) such Asset Sale complies with clause (i) and (ii) of the first  paragraph of
this Section 4.11 and the Company  applies the Net Cash  Proceeds from the Asset
Sale within 45 days  following  the receipt of such Net Cash Proceeds to acquire
additional  Designated  Equipment  and (B) the  Company  takes such action as is
necessary  to  vest in the  Trustee  a  security  interest  in  such  additional
Designated Equipment pursuant to Section 4.22 and the Security Documents.

                  SECTION  4.12.  Repurchase  of  Securities  upon a  Change  of
Control. The Company must commence, within 30 days of the occurrence of a Change
of Control,  and  consummate  an Offer to Purchase for all the  Securities  then
outstanding,  at a purchase  price equal to 101% of the principal  amount of the
Securities  on the date of purchase and accrued and unpaid  interest (if any) on
such  amount to the date of  purchase.  Prior to the  mailing  of the  notice to
Holders of Securities commencing such Offer to Purchase, but in any event within
30 days following any Change of Control,  WCI covenants to (i) repay in full all
indebtedness  of WCI and the Company that would  prohibit the  repurchase of the
Securities  pursuant  to such Offer to  Purchase  or (ii)  obtain any  requisite
consents  under  instruments  governing  any  such  indebtedness  of WCI and the
Company to permit the repurchase of the Securities.  WCI shall first comply with
the  covenant in the  preceding  sentence  before the Company  shall  repurchase
Securities pursuant to this Section 4.12.



<PAGE>


                                       41


                  WCI may not repurchase any subordinated obligations, including
the Convertible Notes, until the Company has repurchased all Securities tendered
pursuant  to the Offer to  Purchase  Securities  as a result  of such  Change of
Control.  However,  if WCI is unable to repay all of its Indebtedness that would
prohibit repurchase of the Securities or is unable to obtain the consents of the
holders of Indebtedness,  if any, outstanding at the time of a Change of Control
whose consent would be so required to permit the repurchase of Securities of WCI
or the Company or otherwise  fail to purchase any Securities  validly  tendered,
then WCI and the Company  will have  breached  such  covenant.  This breach will
constitute an Event of Default under this Indenture if it continues for a period
of 30  consecutive  days after written notice is given to WCI and the Company by
the Trustee or the Holders of at least 25% in aggregate  principal amount of the
Securities  outstanding.  In addition,  the failure by the Company to repurchase
Securities at the  conclusion of the Offer to Purchase will  constitute an Event
of Default without any waiting period or notice requirements.

                  SECTION 4.13. Existence.  Subject to Articles Four and Five of
this Indenture, WCI will do or cause to be done all things necessary to preserve
and keep in full force and effect its existence and the existence of each of its
Restricted  Subsidiaries  in  accordance  with  the  respective   organizational
documents of WCI and each such  Subsidiary and the rights  (whether  pursuant to
charter,  partnership certificate,  agreement,  statute or otherwise),  material
licenses and franchises of WCI and each such Subsidiary; provided, however, that
WCI shall not be required to preserve any such right,  license or franchise,  or
the  existence  of  any  Restricted  Subsidiary  (other  than  of  WCI),  if the
maintenance or preservation thereof is no longer desirable in the conduct of the
business of WCI and its Restricted  Subsidiaries  taken as a whole. In addition,
WCI agrees to take such actions,  within a reasonable  time after the Issue Date
(and in any event prior to any proceeding initiated regarding the dissolution of
WCI), as may be necessary to ensure that it shall be in good standing  under the
laws of the jurisdiction of its incorporation.

                  SECTION 4.14.  Payment of Taxes and Other Claims. WCI will pay
or discharge and shall cause each of its  Subsidiaries  to pay or discharge,  or
cause to be paid or discharged,  before the same shall become delinquent (i) all
material taxes,  assessments and governmental charges levied or imposed upon (a)
WCI or any such  Subsidiary,  (b) the income or  profits of any such  Subsidiary
which is a  corporation  or (c) the property of WCI or any such  Subsidiary  and
(ii) all material  lawful  claims for labor,  materials  and supplies  that,  if
unpaid,  might  by law  become  a lien  upon  the  property  of WCI or any  such
Subsidiary;  provided,  however,  that  WCI  shall  not  be  required  to pay or
discharge, or cause to be paid or discharged,  any such tax, assessment,  charge
or claim the amount,  applicability  or validity of which is being  contested in
good faith by appropriate  proceedings and for which adequate reserves have been
established.

                  SECTION 4.15.  Maintenance of Properties  and  Insurance.  WCI
will cause all  properties  used or useful in the conduct of its business or the
business of any of its  Restricted  Subsidiaries,  to be maintained  and kept in
reasonable  condition,  repair and working order and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,


<PAGE>


                                       42


replacements,  betterments and improvements  thereof,  all as in the judgment of
WCI may be necessary so that the business carried on in connection therewith may
be properly and advantageously  conducted at all times; provided,  however, that
nothing in this  Section  4.15 shall  prevent  WCI or any such  Subsidiary  from
discontinuing  the use,  operation or maintenance  of any of such  properties or
disposing of any of them, if such discontinuance or disposal is, in the judgment
of WCI, desirable in the conduct of the business of WCI or such Subsidiary.

                  WCI will provide or cause to be  provided,  for itself and its
Restricted  Subsidiaries,   insurance  (including  appropriate   self-insurance)
against loss or damage of the kinds customarily  insured against by corporations
similarly  situated and owning like properties,  including,  but not limited to,
product  liability  insurance and public  liability  insurance,  with  reputable
insurers or with the government of the United States of America, or an agency or
instrumentality  thereof,  in such amounts,  with such  deductibles  and by such
methods  as  shall be  customary  for  corporations  similarly  situated  in the
industry in which WCI or such Restricted Subsidiary, as the case may be, is then
conducting business.

                  SECTION 4.16. Notice of Defaults. In the event that WCI or the
Company becomes aware of any Default or Event of Default, WCI or the Company, as
the case may be,  promptly  after it becomes  aware  thereof,  will give written
notice thereof to the Trustee.

                  SECTION 4.17. Compliance Certificates. (a) Each of WCI and the
Company  shall  deliver  to the  Trustee,  within 90 days after the end of WCI's
fiscal year, an Officers' Certificate stating whether or not the signers know of
any Default or Event of Default  that  occurred  during such fiscal  year.  Such
certificates shall contain a certification from the principal executive officer,
principal  financial  officer  or  principal  accounting  officer of WCI and the
Company that a review has been  conducted of the  activities of WCI, the Company
and the  Restricted  Subsidiaries  and WCI's,  the Company's and the  Restricted
Subsidiaries'  performance  under this Indenture and that, to the best knowledge
of such officer,  each of WCI and the Company has complied  with all  conditions
and covenants  under this  Indenture.  For purposes of this Section  4.17,  such
compliance  shall  be  determined  without  regard  to any  period  of  grace or
requirement of notice provided under this  Indenture.  If they do know of such a
Default or Event of Default,  the certificate shall describe any such Default or
Event of Default and its status.

                  (b) WCI shall (to the  extent  not  prohibited  by  applicable
accounting  rules)  deliver to the Trustee,  within 90 days after the end of its
fiscal  year,  a  certificate  signed  by  WCI's  independent  certified  public
accountants  stating (i) that their audit  examination  has included a review of
the terms of this  Indenture  and the  Securities  as they relate to  accounting
matters,  (ii)  that  they  have  read the  most  recent  Officers'  Certificate
delivered  to the Trustee  pursuant to  paragraph  (a) of this  Section 4.17 and
(iii)  whether,  in connection  with their audit  examination,  anything came to
their attention that caused them to believe that WCI or the Company, as the case
may be, was not in compliance  with any of the terms,  covenants,  provisions or
conditions of Article Four and Section 5.01 of this Indenture as they pertain to
accounting matters and, if any


<PAGE>


                                       43


Default or Event of Default has come to their  attention,  specifying the nature
and  period of  existence  thereof;  provided,  however,  that such  independent
certified public accountants shall not be liable in respect of such statement by
reason  of any  failure  to obtain  knowledge  of any such  Default  or Event of
Default  that  would not be  disclosed  in the  course  of an audit  examination
conducted in accordance with generally  accepted auditing standards in effect at
the date of such examination.

                  (c) Within 90 days  after the end of WCI's  fiscal  year,  WCI
shall deliver to the Trustee a list of all Significant Subsidiaries. The Trustee
shall have no duty with  respect to any such list  except to keep it on file and
available for inspection by the Holders.

                  SECTION 4.18.  SEC Reports and Reports to Holders.  Whether or
not WCI is  required  to file  reports  with  the  SEC,  if any  Securities  are
outstanding,  WCI shall file with the SEC all such reports and other information
as it would be required  to file with the SEC by  Sections  13(a) or 15(d) under
the Exchange  Act. WCI shall supply the Trustee and each Holder of Securities or
shall supply to the Trustee for forwarding to each such Holder,  without cost to
the Trustee or such Holder, copies of such reports or other information.

                  SECTION  4.19.  Waiver of Stay,  Extension or Usury Laws.  The
Company covenants (to the extent that it may lawfully do so) that it will not at
any time insist upon, or plead,  or in any manner  whatsoever  claim or take the
benefit or advantage of, any stay or extension law or any usury law or other law
that would prohibit or forgive the Company from paying all or any portion of the
principal of,  premium,  if any, or interest on the  Securities as  contemplated
herein,  wherever  enacted,  now or at any time hereafter in force,  or that may
affect the covenants or the  performance of this  Indenture;  and (to the extent
that it may lawfully do so) the Company hereby  expressly  waives all benefit or
advantage of any such law and covenants that it will not hinder, delay or impede
the  execution of any power herein  granted to the Trustee,  but will suffer and
permit the execution of every such power as though no such law had been enacted.

               SECTION 4.20.  Limitation on the Company's  Business  Activities.
The Company shall not, and WCI shall not permit the Company to,

               (i)  Incur  any  Indebtedness   other  than  the  Securities  and
          refinancing thereof permitted under Section 4.03; or

               (ii)  engage  in any  business  activities  other  than  (A)  the
          activities  contemplated  in  Sections  4.21  and  4.22,  (B)  leasing
          Designated  Equipment and (C) activities  incidental to the activities
          described in clauses (A) and (B) of this clause (ii).

                  SECTION  4.21.  Use of Proceeds.  The Company  shall,  and WCI
shall  cause the Company to,  apply the gross  proceeds  received by the Company
from the sale of the Securities to acquire Designated  Equipment,  including the
payment of the purchase price therefor and


<PAGE>


                                       44


shipping,  handling,  storage,  transportation,  testing and insurance  charges,
design,   integration  and  site  preparation   expenses  and  installation  and
service/warranty  costs  associated  with  the  acquisition  of  any  Designated
Equipment  (collectively,  "Acquisition  Costs"). On the Issue Date, the Company
shall acquire  Designated  Equipment having an Acquisition Cost of at least $2.5
million.  Any gross proceeds not applied on the Issue Date to acquire Designated
Equipment  pursuant  to this  Section  4.21 shall be  invested by the Company in
Temporary Cash Investments pending application of such gross proceeds to acquire
Designated  Equipment (or application of such gross proceeds pursuant to Section
3.02 of the Securities).

                  SECTION 4.22.  Purchase  Money  Security  Interests.  Upon the
acquisition by the Company of Designated  Equipment,  the Company shall, and WCI
shall  cause the  Company  to,  take such  action as is  required to vest in the
Trustee a security interest in such Designated Equipment, for the benefit of the
Holders of  Securities,  and thereupon all  provisions of this Indenture and the
Security  Documents  relating  to  Collateral  shall be  deemed to relate to and
include such  Designated  Equipment.  On the Issue Date and from time to time if
requested by the Trustee, the Company shall, and WCI shall cause the Company to,
execute such security  instruments and financing statements as may be reasonably
necessary  to vest in the Trustee such  security  interests.  In addition,  with
respect to any  telecommunications  switch that constitutes Designated Equipment
acquired pursuant to Section 4.21, the Company shall post a notice on, or in the
location housing, such telecommunications switch, identifying the Company as the
owner of such telecommunications switch and stating that such telecommunications
switch is subject to the security interest under this Indenture and the Security
Documents.

                  SECTION  4.23.  Impairment of Security  Interest.  The Company
shall,  and WCI shall cause the Company to, on or prior to the date that is four
business days following the Issue Date,  file UCC-1s in each state in the United
States  covering all Designated  Equipment  acquired by the Company  pursuant to
Section 4.21, and to file such UCC-3  continuation  statements from time to time
as may be necessary to continue to vest in the Trustee the security  interest in
such  Designated  Equipment,  and the Company  shall not,  and WCI shall not and
shall not permit any of its Subsidiaries to, grant to any Person (other than the
Collateral  Agent on behalf of Holders of the Securities) any security  interest
in the Collateral.

               SECTION  4.24.  Ownership of the Company.  WCI shall at all times
own all the Capital Stock of the Company.




<PAGE>


                                       45


                                  ARTICLE FIVE
                              SUCCESSOR CORPORATION

                  SECTION 5.01. When WCI or the Company May Merge,  Etc. (a) WCI
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 (other than a consolidation or merger with
or  into a  Wholly  Owned  Restricted  Subsidiary  with a  positive  net  worth;
provided, however, that, in connection with any such merger or consolidation, no
consideration  (other than Common Stock in the surviving Person or WCI) shall be
issued or distributed to the  stockholders of WCI) or permit any Person to merge
with or into WCI unless:

               (i) WCI shall be the continuing  Person,  or the Person (if other
          than WCI) formed by such  consolidation or into which WCI is merged or
          that  acquired  or leased such  property  and assets of WCI shall be a
          corporation  organized  and  validly  existing  under  the laws of the
          United  States  of  America  or any  jurisdiction  thereof  and  shall
          expressly assume, by a supplemental indenture,  executed and delivered
          to the Trustee, all of the obligations of WCI on all of the Securities
          and under this Indenture;

               (ii)  immediately  after giving  effect to such  transaction,  no
          Default or Event of Default shall have occurred and be continuing;

               (iii)  immediately  after giving effect to such  transaction on a
          pro forma basis,  WCI or any Person becoming the successor  obligor of
          the Securities shall have a Consolidated Net Worth equal to or greater
          than  the  Consolidated  Net  Worth of WCI  immediately  prior to such
          transaction;

               (iv) immediately after giving effect to such transaction on a pro
          forma basis WCI, or any Person  becoming the successor  obligor of the
          Securities could Incur at least $1.00 of Indebtedness  under the first
          paragraph of Section 4.03; and

               (v)  WCI  delivers  to  the  Trustee  an  Officers'   Certificate
          (attaching the arithmetic  computations to demonstrate compliance with
          clauses  (iii) and, if  applicable,  (iv)) and Opinion of Counsel,  in
          each case stating that such consolidation, merger or transfer and such
          supplemental  indenture  complies with the  provisions of this Section
          5.01 and that all conditions precedent provided for herein relating to
          such transaction have been complied with;

provided,  however,  that  clauses  (iii) and (iv) above do not apply if, in the
good faith  determination of the Board of Directors of WCI, whose  determination
shall  be  evidenced  by a  Board  Resolution,  the  principal  purpose  of such
transaction is to change the state of incorporation of WCI; provided


<PAGE>


                                       46


further,  however,  that  any  such  transaction  shall  not  have as one of its
purposes the evasion of the foregoing limitations.

                  (b) The  Company  shall not  consolidate  with,  merge with or
into, or sell,  convey,  transfer,  lease (other than in the ordinary  course of
business) or otherwise  dispose of all or substantially  all of its property and
assets to,  any  Person or permit any Person to merge with and into the  Company
unless:  (i) the Company shall be the continuing Person, or the Person (if other
than the  Company)  formed by such  consolidation  or into which the  Company is
merged or that  acquired or leased such property and assets of the Company shall
be a  corporation  organized and validly  existing  under the laws of the United
States of America or any jurisdiction  thereof and shall expressly  assume, by a
supplemental  indenture,  executed  and  delivered  to the  Trustee,  all of the
obligations of the Company on all of the  Securities  and under this  Indenture;
(ii) immediately after giving effect to such transaction, no Default or Event of
Default shall have occurred and be continuing; and (iii) the Company delivers to
the  Trustee an  Officers'  Certificate  and  Opinion of  Counsel,  in each case
stating  that such  consolidation,  merger  or  transfer  and such  supplemental
indenture  complies  with  this  provision  and  that all  conditions  precedent
provided for herein relating to such transaction have been complied with.

                  SECTION 5.02. Successor Substituted. Upon any consolidation or
merger,  or any  sale,  conveyance,  transfer  or  other  disposition  of all or
substantially all of the property and assets of WCI or the Company,  as the case
may be, in accordance with Section 5.01 of this Indenture,  the successor Person
formed by such  consolidation or into which WCI or the Company,  as the case may
be, is merged or to which such sale,  conveyance,  transfer or other disposition
is made shall succeed to, and be  substituted  for, and may exercise every right
and power of, WCI or the Company,  as the case may be, under this Indenture with
the  same  effect  as if such  successor  Person  had  been  named as WCI or the
Company, as the case may be, herein.


                                   ARTICLE SIX
                              DEFAULT AND REMEDIES

               SECTION  6.01.  Events of Default.  An "Event of  Default"  shall
occur with respect to the Securities if:

               (a) the Company  defaults in the payment of the  principal of (or
          premium,  if any,  on) any  Security  when  the same  becomes  due and
          payable upon acceleration, redemption or otherwise;

               (b) the  Company  defaults  in the  payment  of  interest  on any
          Security  when the same  becomes  due and  payable,  and such  default
          continues for a period of 30 days;


<PAGE>


                                       47


                  (c) the  Company  or WCI  defaults  in the  performance  of or
         breaches  any  other  covenant  or  agreement  of  the  Company  or WCI
         contained  in this  Indenture or under the  Securities  or the Security
         Documents  and such  default  or  breach  continues  for a period of 30
         consecutive  days after  written  notice to the  Company and WCI by the
         Trustee or the Holders of 25% or more in aggregate  principal amount of
         the Securities;

                  (d)  there  occurs  with  respect  to any  issue or  issues of
         Indebtedness   of  WCI,  or  any  Significant   Subsidiary   having  an
         outstanding  principal  amount of  $25,000,000 or more in the aggregate
         for all such issues of all such Persons,  whether such Indebtedness now
         exists or shall hereafter be created,  (i) an event of default that has
         caused the holder  thereof to declare such  Indebtedness  to be due and
         payable prior to its Stated Maturity and such Indebtedness has not been
         discharged  in full or such  acceleration  has not  been  rescinded  or
         annulled within 30 days of such acceleration and/or (ii) the failure to
         make a  principal  payment  at the final  (but not any  interim)  fixed
         maturity and such defaulted payment shall not have been made, waived or
         extended within 30 days of such payment default;

                  (e) any final judgment or order (not covered by insurance) for
         the payment of money in excess of  $25,000,000 in the aggregate for all
         such final  judgments or orders against all such Persons  (treating any
         deductibles,  self-insurance  or retention as not so covered)  shall be
         rendered  against WCI or any  Significant  Subsidiary  and shall not be
         paid or  discharged,  and there  shall be any period of 60  consecutive
         days  following  entry of the final  judgment  or order that causes the
         aggregate amount for all such final judgments or orders outstanding and
         not paid or discharged  against all such Persons to exceed  $25,000,000
         during which a stay of enforcement of such final judgment or order,  by
         reason of a pending appeal or otherwise, shall not be in effect;

                  (f) a court  having  jurisdiction  in the  premises  enters  a
         decree or order for (A)  relief in  respect  of WCI or any  Significant
         Subsidiary  in an  involuntary  case under any  applicable  bankruptcy,
         insolvency  or  other  similar  law now or  hereafter  in  effect,  (B)
         appointment of a receiver,  liquidator,  assignee,  custodian, trustee,
         sequestrator or similar  official of WCI or any Significant  Subsidiary
         or for all or  substantially  all of the  property and assets of WCI or
         any Significant  Subsidiary or (C) the winding up or liquidation of the
         affairs of WCI or any  Significant  Subsidiary  and, in each case, such
         decree or order shall remain  unstayed and in effect for a period of 60
         consecutive days;

                  (g)  WCI  or  any  Significant   Subsidiary  (i)  commences  a
         voluntary  case under any  applicable  bankruptcy,  insolvency or other
         similar law now or hereafter in effect,  or consents to the entry of an
         order  for  relief in an  involuntary  case  under  any such law,  (ii)
         consents  to the  appointment  of or taking  possession  by a receiver,
         liquidator,  assignee,  custodian,  trustee,  sequestrator  or  similar
         official of WCI or any Significant Subsidiary or


<PAGE>


                                       48


          for all or  substantially  all of the  property  and assets of WCI any
          Significant Subsidiary or (iii) effects any general assignment for the
          benefit of creditors;

                  (h) any of the  provisions of this  Indenture  relating to the
         Security  Documents or the Security Documents shall cease to be in full
         force and effect or shall cease to give the secured  parties the Liens,
         rights, powers and privileges purported to be created thereby; or

                  (i) the  Equipment  Note  Guarantee  shall cease to be in full
         force and  effect  (other  than in  accordance  with its  terms) or the
         Guarantor shall deny or disaffirm its  obligations  under the Equipment
         Note Guarantee.

                  SECTION 6.02. Acceleration. If an Event of Default (other than
an Event of Default  specified  in clause (f) or (g) of Section 6.01 that occurs
with  respect  to the  Company  or WCI)  occurs  and is  continuing  under  this
Indenture,  the  Trustee or the Holders of at least 25% in  aggregate  principal
amount of the Securities, then outstanding, by written notice to the Company and
WCI (and to the Trustee if such notice is given by the  Holders),  may,  and the
Trustee at the request of such Holders shall, declare the principal of, premium,
if any,  and  accrued  interest  on the  Securities  to be  immediately  due and
payable.  Upon a declaration of acceleration,  such principal,  premium, if any,
and accrued  interest  shall be immediately  due and payable.  In the event of a
declaration of acceleration  because an Event of Default set forth in clause (d)
of Section 6.01 has occurred and is continuing, such declaration of acceleration
shall be automatically rescinded and annulled if the event of default triggering
such Event of Default  pursuant  to clause (d) shall be remedied or cured by the
Company, WCI or the relevant Significant  Subsidiary or waived by the holders of
the relevant  Indebtedness  within 60 days after the declaration of acceleration
with respect thereto.  If an Event of Default  specified in clause (f) or (g) of
Section  6.01  occurs  with  respect to the Company or WCI,  the  principal  of,
premium,  if any, and accrued interest on the Securities then outstanding  shall
ipso facto become and be immediately  due and payable without any declaration or
other act on the part of the Trustee or any Holder.

                  At any time  after such a  declaration  of  acceleration,  but
before a judgment or decree for the  payment of the money due has been  obtained
by the Trustee,  the Holders of at least a majority in  principal  amount of the
outstanding Securities by written notice to the Company, WCI and to the Trustee,
may  waive  all  past  Defaults  and  rescind  and  annul  such  declaration  of
acceleration  and its consequences if (a) the Company has paid or deposited with
the Trustee a sum sufficient to pay (i) all sums paid or advanced by the Trustee
hereunder and the reasonable compensation,  expenses, disbursements and advances
of the  Trustee,  its agents  and  counsel,  (ii) all  overdue  interest  on all
Securities,  (iii) the principal of and premium,  if any, on any Securities that
have become due otherwise than by such declaration or occurrence of acceleration
and interest  thereon at the rate prescribed  therefor by such  Securities,  and
(iv) to the extent  that  payment of such  interest  is  lawful,  interest  upon
overdue interest at the rate prescribed therefor by such


<PAGE>


                                       49


Securities, (b) all existing Events of Default, other than the nonpayment of the
principal of, premium,  if any, and accrued interest on the Securities that have
become due solely by such declaration of acceleration, have been cured or waived
and (c) the rescission would not conflict with any judgment or decree of a court
of competent jurisdiction.

                  SECTION 6.03.  Other  Remedies.  If an Event of Default occurs
and is continuing,  the Trustee may pursue any available remedy by proceeding at
law or in equity to collect the payment of  principal  of,  premium,  if any, or
interest on the Securities or to enforce the performance of any provision of the
Securities, the Security Documents or this Indenture.

                  The  Trustee  may  maintain a  proceeding  even if it does not
possess any of the Securities or does not produce any of them in the proceeding.

                  SECTION  6.04.  Waiver of Past  Defaults.  Subject to Sections
6.02,  6.07 and 9.02, the Holders of at least a majority in principal  amount of
the outstanding Securities, by written notice to the Trustee, may waive all past
Defaults  and  Events  of  Default  and  rescind  and  annul  a  declaration  of
acceleration  (except a Default in the payment of principal of, premium, if any,
or interest on any Security as specified in clause (a) or (b) of Section 6.01 or
in respect of a covenant or provision of this Indenture which cannot be modified
or  amended  without  the  consent of the  holder of each  outstanding  Security
affected) if (i) all existing  Events of Default,  other than the  nonpayment of
principal of,  premium,  if any, or interest on the Securities  that have become
due solely by such  declaration of  acceleration,  have been cured or waived and
(ii) the rescission would not conflict with any judgment or decree of a court of
competent jurisdiction. Upon any such waiver, such Default shall cease to exist,
and any Event of Default  arising  therefrom shall be deemed to have been cured,
for every  purpose of this  Indenture;  but no such waiver  shall  extend to any
subsequent or other  Default or Event of Default or impair any right  consequent
thereto.

                  SECTION 6.05.  Control by Majority.  The Holders of at least a
majority in aggregate principal amount of the outstanding  Securities may direct
the time, method and place of conducting any proceeding for any remedy available
to the  Trustee  or  exercising  any trust or power  conferred  on the  Trustee;
provided,  however,  that the  Trustee may refuse to follow any  direction  that
conflicts with law or this  Indenture,  that may involve the Trustee in personal
liability,  or  that  the  Trustee  determines  in  good  faith  may  be  unduly
prejudicial  to the  rights  of  Holders  not  joining  in the  giving  of  such
direction;  and provided further,  however,  that the Trustee may take any other
action it deems proper that is not  inconsistent  with any  directions  received
from Holders of Securities pursuant to this Section 6.05.

               SECTION 6.06.  Limitation  on Suits.  A Holder or Holders may not
institute any proceeding, judicial or otherwise, with respect to this Indenture,
the Security Documents or the

<PAGE>


                                       50


Securities,  or for the  appointment of a receiver or trustee,  or for any other
remedy hereunder, unless:

               (i) such Holder or Holders have  previously  given to the Trustee
          written notice of a continuing Event of Default;

               (ii) the Holders of at least 25% in aggregate principal amount of
          outstanding  Securities shall have made written request to the Trustee
          to  institute  proceedings  in respect of such Event of Default in its
          own name as Trustee hereunder;

               (iii)  such  Holder  or  Holders  have  offered  to  the  Trustee
          indemnity  reasonably  satisfactory  to the Trustee against any costs,
          liabilities  or  expenses  to be  incurred  in  compliance  with  such
          request;

               (iv) the Trustee  for 60 days after its  receipt of such  notice,
          request  and  offer of  indemnity  has  failed to  institute  any such
          proceeding; and

               (v) during  such  60-day  period,  the  Holders of a majority  in
          aggregate  principal  amount of the  outstanding  Securities  have not
          given the Trustee a direction that is  inconsistent  with such written
          request.

                  For  purposes  of  Section  6.05 of this  Indenture  and  this
Section  6.06,  the Trustee  shall comply with TIA Section  316(a) in making any
determination of whether the Holders of the required aggregate  principal amount
of  outstanding  Securities  have  concurred  in any request or direction of the
Trustee to pursue any  remedy  available  to the  Trustee  or the  Holders  with
respect to this Indenture or the Securities or otherwise under the law.

                  A Holder may not use this Indenture to prejudice the rights of
another Holder or to obtain a preference or priority over such other Holder.

                  SECTION   6.07.   Rights  of  Holders   to  Receive   Payment.
Notwithstanding  any other provision of this Indenture,  the right of any Holder
of a Security to receive payment of principal of,  premium,  if any, or interest
on such Holder's Security on or after the respective due dates expressed on such
Security,  or to bring suit for the  enforcement of any such payment on or after
such respective dates,  shall not be impaired or affected without the consent of
such Holder.

                  SECTION  6.08.  Collection  Suit by  Trustee.  If an  Event of
Default in payment of  principal,  premium or interest  specified in clause (a),
(b) or (c) of Section  6.01  occurs and is  continuing,  the Trustee may recover
judgment in its own name and as trustee of an express  trust against the Company
or any  other  obligor  of the  Securities  for the whole  amount of  principal,
premium,  if any, and accrued interest remaining unpaid,  together with interest
on overdue principal,  premium,  if any, and, to the extent that payment of such
interest is lawful, interest on


<PAGE>


                                       51


overdue  installments  of  interest,  in each case at the rate  specified in the
Securities,  and such further  amount as shall be  sufficient to cover the costs
and expenses of  collection,  including the reasonable  compensation,  expenses,
disbursements and advances of the Trustee, its agents and counsel.

                  SECTION  6.09.  Trustee May File Proofs of Claim.  The Trustee
may file such proofs of claim and other  papers or documents as may be necessary
or advisable in order to have the claims of the Trustee (including any claim for
the  reasonable  compensation,  expenses,  disbursements  and  advances  of  the
Trustee,  its agents and counsel,  and any other  amounts due the Trustee  under
Section 7.07) and the Holders  allowed in any judicial  proceedings  relative to
the Company  (or any other  obligor of the  Securities),  its  creditors  or its
property and shall be entitled and  empowered to collect and receive any monies,
securities or other property  payable or deliverable upon conversion or exchange
of the  Securities or upon any such claims and to distribute  the same,  and any
custodian,  receiver,  assignee,  trustee,  liquidator,  sequestrator  or  other
similar  official in any such judicial  proceeding is hereby  authorized by each
Holder to make such  payments to the Trustee  and, in the event that the Trustee
shall consent to the making of such payments directly to the Holders,  to pay to
the  Trustee  any amount due to it for the  reasonable  compensation,  expenses,
disbursements and advances of the Trustee,  its agent and counsel, and any other
amounts due the Trustee under Section 7.07.  Nothing herein  contained  shall be
deemed to empower the Trustee to  authorize or consent to, or accept or adopt on
behalf of any Holder,  any plan of  reorganization,  arrangement,  adjustment or
composition  affecting the Securities or the rights of any Holder thereof, or to
authorize  the Trustee to vote in respect of the claim of any Holder in any such
proceeding.

               SECTION  6.10.  Priorities.  If the Trustee holds or collects any
money or property  pursuant to this  Article  Six, it shall pay out the money or
property in the following order:

               First:  to the Trustee for all amounts due under Section 7.07 and
          to the  Collateral  Agent  for all  amounts  due  under  the  Security
          Documents;

               Second:  to Holders for amounts then due and unpaid for principal
          of,  premium,  if any,  and interest on the  Securities  in respect of
          which or for the  benefit  of which  such  money  has been  collected,
          ratably,  without preference or priority of any kind, according to the
          amounts due and payable on such Securities for principal,  premium, if
          any, and interest, respectively; and

               Third: to the Company or any other obligors of the Securities, as
          their  interests may appear,  or as a court of competent  jurisdiction
          may direct.

                  The Trustee, upon prior written notice to the Company, may fix
a record  date and  payment  date for any  payment to Holders  pursuant  to this
Section 6.10.



<PAGE>


                                       52


                  SECTION  6.11.  Undertaking  for  Costs.  In any  suit for the
enforcement  of any right or remedy under this  Indenture or in any suit against
the  Trustee  for any  action  taken or omitted  by it as  Trustee,  a court may
require any party  litigant in such suit to file an undertaking to pay the costs
of the suit, and the court may assess  reasonable  costs,  including  reasonable
attorneys' fees, against any party litigant in the suit having due regard to the
merits and good faith of the claims or defenses made by the party litigant. This
Section  6.11  does  not  apply  to a suit by the  Trustee,  a suit by a  Holder
pursuant to Section  6.07 of this  Indenture,  or a suit by Holders of more than
10% in principal amount of the outstanding Securities.

                  SECTION  6.12.  Restoration  of Rights  and  Remedies.  If the
Trustee or any Holder has  instituted  any  proceeding  to enforce  any right or
remedy  under  this  Indenture  and such  proceeding  has been  discontinued  or
abandoned for any reason, or has been determined  adversely to the Trustee or to
such Holder,  then, and in every such case, subject to any determination in such
proceeding, the Company, the Trustee and the Holders shall be restored severally
and respectively to their former  positions  hereunder and thereafter all rights
and remedies of the Company, Trustee and the Holders shall continue as though no
such proceeding has been instituted.

                  SECTION  6.13.  Rights  and  Remedies  Cumulative.  Except  as
otherwise  provided  with respect to the  replacement  or payment of  mutilated,
destroyed,  lost or  wrongfully  taken  Securities  in Section 2.07, no right or
remedy  herein  conferred  upon or  reserved to the Trustee or to the Holders is
intended  to be  exclusive  of any other  right or remedy,  and every  right and
remedy shall,  to the extent  permitted by law, be cumulative and in addition to
every other right and remedy given hereunder or now or hereafter existing at law
or in equity or  otherwise.  The  assertion or employment of any right or remedy
hereunder,  or  otherwise,   shall  not  prevent  the  concurrent  assertion  or
employment of any other appropriate right or remedy.

                  SECTION  6.14.  Delay  or  Omission  Not  Waiver.  No delay or
omission  of the  Trustee  or of any  Holder  to  exercise  any  right or remedy
accruing  upon any Event of  Default  shall  impair  any such right or remedy or
constitute  a waiver of any such Event of Default  or an  acquiescence  therein.
Every right and remedy  given by this Article Six or by law to the Trustee or to
the Holders may be  exercised  from time to time,  and as often as may be deemed
expedient, by the Trustee or by the Holders, as the case may be.


                                  ARTICLE SEVEN
                                     TRUSTEE

                  SECTION 7.01. General.  The duties and responsibilities of the
Trustee shall be as provided by the TIA and as set forth herein.  Whether or not
herein expressly so provided,  every provision of this Indenture relating to the
conduct or affecting  the  liability of or affording  protection  to the Trustee
shall be subject to the provisions of this Article Seven.


<PAGE>


                                       53



               SECTION 7.02. Certain Rights of Trustee.  Subject to TIA Sections
315(a) through (d):

                  (i) the Trustee may rely and shall be  protected  in acting or
         refraining  from acting upon any  resolution,  certificate,  statement,
         instrument,  opinion,  report,  notice,  request,  direction,  consent,
         order, bond,  debenture,  note, other evidence of indebtedness or other
         paper or document  believed by it to be genuine and to have been signed
         or presented by the proper person. The Trustee need not investigate any
         fact  or  matter   stated  in  the  document  and  may  in  good  faith
         conclusively rely as to the truth of the statements and the correctness
         of the opinions therein;

                  (ii) before the Trustee acts or refrains  from acting,  it may
         require an Officers'  Certificate or an Opinion of Counsel. The Trustee
         shall  not be liable  for any  action it takes or omits to take in good
         faith in reliance on such  certificate,  opinion and/or an accountants'
         certificate;

                  (iii) the Trustee may act through its attorneys and agents and
         shall  not be  responsible  for the  misconduct  or  negligence  of any
         attorney or agent appointed with due care;

                  (iv) the Trustee  shall be under no obligation to exercise any
         of the rights or powers vested in it by this  Indenture or the Security
         Documents at the request or  direction  of any of the  Holders,  unless
         such Holders  shall have  offered to the Trustee  security or indemnity
         reasonably   satisfactory  to  it  against  the  costs,   expenses  and
         liabilities  that  might be  incurred  by it in  compliance  with  such
         request or direction;

                  (v) the Trustee shall not be liable for any action it takes or
         omits to take in good faith that it believes to be authorized or within
         its  rights or  powers  or for any  action it takes or omits to take in
         accordance with the direction of the Holders of a majority in principal
         amount of the Outstanding  Securities  relating to the time, method and
         place of  conducting  any  proceeding  for any remedy  available to the
         Trustee,  or exercising any trust or power  conferred upon the Trustee,
         under this Indenture;  provided,  however,  that the Trustee's  conduct
         does not constitute negligence or bad faith;

                  (vi)  whenever in the  administration  of this  Indenture  the
         Trustee shall deem it desirable that a fact or  circumstance  be proved
         or  established  prior to  taking,  suffering  or  omitting  any action
         hereunder,  the Trustee  (unless other evidence be herein  specifically
         prescribed)  may, in the absence of bad faith on its part,  request and
         rely upon an Officer's Certificate;

                  (vii) the Trustee shall not be bound to make any investigation
         into the  facts  or  matters  stated  in any  resolution,  certificate,
         statement, instrument, opinion, report, notice,


<PAGE>


                                       54


         request,  direction,  consent,  order,  bond,  debenture,  note,  other
         evidence of indebtedness  or other paper or document,  but the Trustee,
         in its discretion,  may make such further inquiry or investigation into
         such facts or  matters as it may see fit,  and,  if the  Trustee  shall
         determine to make such further  inquiry or  investigation,  it shall be
         entitled  to examine  the books,  records  and  premises of the Company
         personally or by agent or attorney; and

                  (viii)  any  request or  direction  of the  Company  mentioned
         herein shall be  sufficiently  evidenced by a written Company Order and
         any resolution of the Board of Directors may be sufficiently  evidenced
         by a written Board Resolution.

                  SECTION 7.03.  Individual Rights of Trustee.  The Trustee,  in
its  individual  or any other  capacity,  may  become  the owner or  pledgee  of
Securities and may otherwise  deal with the Company or its  Affiliates  with the
same rights it would have if it were not the Trustee.  Any Agent may do the same
with like rights.  However,  the Trustee is subject to TIA  Sections  310(b) and
311.

                  SECTION 7.04. Trustee's  Disclaimer.  The Trustee (i) makes no
representation as to the validity or adequacy of this Indenture,  the Securities
or the  Collateral,  (ii)  shall not be  accountable  for the  Company's  use or
application of the proceeds from the Securities,  (iii) shall not be responsible
for any statement in the Securities other than its certificate of authentication
and (iv) shall not be responsible  for the perfection of the Lien granted by the
Security Documents in the Collateral.

                  SECTION 7.05.  Notice of Default.  If any Default or any Event
of Default  occurs and is continuing  and if such Default or Event of Default is
known to a trust  officer of the Trustee,  the Trustee shall mail to each Holder
in the manner and to the extent  provided  in TIA Section  313(c)  notice of the
Default or Event of Default  within five Business  Days after it occurs,  unless
such Default or Event of Default has been cured; provided, however, that, except
in the case of a default in the payment of the principal of, premium, if any, or
interest on any  Security,  the Trustee shall be protected in  withholding  such
notice if and so long as the board of directors,  the  executive  committee or a
trust committee of directors  and/or the  Responsible  Officer of the Trustee in
good faith  determines that the withholding of such notice is in the interest of
the Holders.

                  SECTION  7.06.  Reports by Trustee to Holders.  Within 60 days
after each May 15,  beginning  with May 15, 1998, the Trustee shall mail to each
Holder as provided in TIA Section  313(c) a brief report that  complies with TIA
Section 313(a) dated as of such May 15, if required by TIA Section 313(a).

               SECTION 7.07.  Compensation and Indemnity.  The Company shall pay
to  the  Trustee  from  time  to  time  and  upon  the  Trustee's  request  such
compensation as shall be agreed upon in writing for its services in any capacity
hereunder. The compensation of the Trustee shall


<PAGE>


                                       55


not be limited by any law on compensation of a trustee of an express trust.  The
Company   shall   reimburse   the  Trustee  upon  request  for  all   reasonable
out-of-pocket  expenses and advances incurred or made by the Trustee;  provided,
however,  that the Trustee  shall be under no obligation  whatsoever  under this
Indenture or any other document delivered in connection with the Securities,  to
advance or expend its own funds.  Such  expenses  shall  include the  reasonable
compensation and expenses of the Trustee's agents and counsel.

                  The  Company  shall  indemnify  the Trustee  for,  and hold it
harmless  against,  any loss or  liability  or  expense  incurred  by it without
negligence  or bad  faith  on its part in  connection  with  the  acceptance  or
administration  of this  Indenture  and its duties under this  Indenture and the
Securities,  including,  without limitation, the costs and expenses of defending
itself  against any claim or liability and of complying  with any process served
upon it or any of its officers in connection with the exercise or performance of
any of its powers or duties under this Indenture and the Securities.

                  To secure the Company's  payment  obligations  in this Section
7.07,  the  Trustee  shall have a lien prior to the  Securities  on all money or
property  held or collected by the Trustee,  in its capacity as Trustee,  except
money or  property  held in trust to pay  principal  of,  premium,  if any,  and
interest on particular Securities.

                  If the Trustee incurs  expenses or renders  services after the
occurrence  of an Event of  Default  specified  in clause  (f) or (g) of Section
6.01,  the  expenses  and the  compensation  for the  services  are  intended to
constitute  expenses  of  administration  under  Title 11 of the  United  States
Bankruptcy  Code or any  applicable  federal  or  state  law for the  relief  of
debtors.

                  SECTION 7.08. Replacement of Trustee. A resignation or removal
of the Trustee and  appointment  of a successor  Trustee shall become  effective
only upon the successor Trustee's  acceptance of appointment as provided in this
Section 7.08.

                  The Trustee may resign at any time by so notifying the Company
in writing at least 30 days prior to the date of the proposed  resignation.  The
Holders of a majority in  principal  amount of the  outstanding  Securities  may
remove the  Trustee by so  notifying  the  Trustee in writing  and may appoint a
successor  Trustee with the consent of the Company.  The Company may at any time
remove the Trustee, by Company Order given at least 30 days prior to the date of
the proposed removal.

                  If the Trustee  resigns or is removed,  or if a vacancy exists
in the office of Trustee for any reason,  the Company shall  promptly  appoint a
successor Trustee. Within one year after the successor Trustee takes office, the
Holders of a majority in  principal  amount of the  outstanding  Securities  may
appoint a successor  Trustee to replace the successor  Trustee  appointed by the
Company.  If the  successor  Trustee  does not deliver  its  written  acceptance
required by the next  succeeding  paragraph  of this Section 7.08 within 30 days
after the retiring Trustee resigns or is


<PAGE>


                                       56


removed,  the  retiring  Trustee,  the  Company or the  Holders of a majority in
principal  amount  of the  outstanding  Securities  may  petition  any  court of
competent jurisdiction for the appointment of a successor Trustee.

                  A successor Trustee shall deliver a written  acceptance of its
appointment to the retiring  Trustee and to the Company.  Immediately  after the
delivery of such  written  acceptance,  either  subject to the lien  provided in
Section 7.07 or less amounts retained by the retiring Trustee to satisfy amounts
owed to it pursuant to the terms of this Indenture, including but not limited to
Section  7.07  hereof,  as the  retiring  Trustee  determines,  (i) the retiring
Trustee  shall  transfer  all  property  held by it as Trustee to the  successor
Trustee,  (ii) the  resignation or removal of the retiring  Trustee shall become
effective and (iii) the successor Trustee shall have all the rights,  powers and
duties of the  Trustee  under this  Indenture.  A successor  Trustee  shall mail
notice of its succession to each Holder.

                  If the Trustee is no longer  eligible  under Section 7.10, any
Holder who satisfies  the  requirements  of TIA Section  310(b) may petition any
court  of  competent  jurisdiction  for  the  removal  of the  Trustee  and  the
appointment of a successor Trustee.

                  The  Company  shall  give  notice of any  resignation  and any
removal  of the  Trustee  and each  appointment  of a  successor  Trustee to all
Holders.  Each notice shall  include the name of the  successor  Trustee and the
address of its Corporate Trust Office.

                  Notwithstanding  replacement  of the Trustee  pursuant to this
Section  7.08,  the  Company's  obligations  under  Section 7.07 shall  continue
indefinitely for the benefit of the retiring Trustee.

                  SECTION 7.09. Successor Trustee by Merger, Etc. If the Trustee
consolidates  with,  merges or converts into, or transfers all or  substantially
all of its corporate trust business to, another  corporation or national banking
association,  the  resulting,  surviving or transferee  corporation  or national
banking  association without any further act shall be the successor Trustee with
the same  effect  as if the  successor  Trustee  had been  named as the  Trustee
herein.

                  SECTION 7.10. Eligibility.  This Indenture shall always have a
Trustee who satisfies the  requirements  of TIA Section  310(a)(1).  The Trustee
shall have a combined  capital and surplus of at least  $25,000,000 as set forth
in its most recent published annual report of condition.

                  SECTION  7.11.  Money Held in Trust.  The Trustee shall not be
liable for interest on any money  received by it except as the Trustee may agree
in writing  with the  Company.  Money held in trust by the  Trustee  need not be
segregated  from other funds except to the extent required by law and except for
money held in trust under Article Eight of this Indenture.



<PAGE>


                                       57


                  SECTION 7.12. Withholding Taxes. The Trustee, as agent for the
Company,  shall exclude and withhold from each payment of principal and interest
and other amounts due hereunder or under the Securities any and all  withholding
taxes  applicable  thereto as required by law. The Trustee agrees to act as such
withholding agent and, in connection  therewith,  whenever any present or future
taxes or similar charges are required to be withheld with respect to any amounts
payable in respect of the  Securities,  to withhold  such amounts and timely pay
the  same to the  appropriate  authority  in the  name of and on  behalf  of the
holders  of the  Securities,  that it will file any  necessary  withholding  tax
returns or  statements  when due,  and that,  as promptly as possible  after the
payment  thereof,  it will  deliver  to each  Holder of a  Security  appropriate
documentation  showing  the  payment  thereof,  together  with  such  additional
documentary evidence as such Holders may reasonably request from time to time.


                                  ARTICLE EIGHT
                             DISCHARGE OF INDENTURE

               SECTION 8.01.  Termination  of Company's  Obligations.  Except as
otherwise  provided  in  this  Section  8.01,  the  Company  may  terminate  its
obligations under the Securities and this Indenture if:

                  (i) all  Securities  previously  authenticated  and  delivered
         (other  than  destroyed,  lost or  stolen  Securities  that  have  been
         replaced  or  Securities  that are paid  pursuant  to  Section  4.01 or
         Securities for whose payment money or securities have  theretofore been
         held in trust and  thereafter  repaid to the  Company,  as  provided in
         Section 8.05) have been delivered to the Trustee for  cancellation  and
         the Company has paid all sums payable by it hereunder; or

                  (ii) (A) the Securities  mature within one year or all of them
         are to be called for  redemption  within  one year  under  arrangements
         satisfactory  to the Trustee for giving the notice of  redemption,  (B)
         the Company irrevocably  deposits in trust with the Trustee during such
         one-year period,  under the terms of an irrevocable  trust agreement in
         form and substance  satisfactory to the Trustee,  as trust funds solely
         for  the  benefit  of the  Holders  for  that  purpose,  money  or U.S.
         Government  Obligations  sufficient  (in the  opinion  of a  nationally
         recognized  firm  of  independent  public  accountants  expressed  in a
         written  certification  thereof  delivered  to  the  Trustee),  without
         consideration  of any  reinvestment  of any  interest  thereon,  to pay
         principal, premium, if, any, and interest on the Securities to maturity
         or redemption, as the case may be, and to pay all other sums payable by
         it  hereunder,  (C) no Default or Event of Default  with respect to the
         Securities  shall have  occurred and be  continuing on the date of such
         deposit,  (D) such deposit will not result in a breach or violation of,
         or constitute a default under, this Indenture or any other agreement or
         instrument  to which the Company is a party or by which it is bound and
         (E) the Company has  delivered to the Trustee an Officers'  Certificate
         and an Opinion of


<PAGE>


                                       58


         Counsel,  in each case stating that all conditions  precedent  provided
         for herein relating to the satisfaction and discharge of this Indenture
         have been complied with.

                  With  respect  to the  foregoing  clause  (i),  the  Company's
obligations  under  Section 7.07 shall  survive.  With respect to the  foregoing
clause (ii), the Company's obligations in Sections 2.02, 2.03, 2.04, 2.05, 2.06,
2.07,  2.11, 4.01, 4.02, 7.07, 7.08, 8.04, 8.05 and 8.06 shall survive until the
Securities are no longer outstanding. Thereafter, only the Company's obligations
in  Sections  7.07,  8.05 and 8.06  shall  survive.  After any such  irrevocable
deposit,  the Trustee upon request shall acknowledge in writing the discharge of
the Company's  obligations,  as the case may be, under the  Securities  and this
Indenture except for those surviving obligations specified above.

                  SECTION  8.02.  Defeasance  and  Discharge of  Indenture.  The
Company  will be  deemed to have  paid and will be  discharged  from any and all
obligations  in respect of the  Securities  (including the provisions of Article
Eleven by which the  Securities  are  secured by  Collateral  and Article Ten by
which the  Securities  are  Guaranteed by the Equipment  Note  Guarantee) on the
123rd day (or, to the extent  applicable under clause (D) below, one year) after
the date of the deposit referred to in clause (A) of this Section 8.02 if:

                  (A) with  reference  to this  Section  8.02,  the  Company has
         irrevocably  deposited or caused to be  irrevocably  deposited with the
         Trustee (or another trustee satisfying the requirements of Section 7.10
         of this  Indenture) and conveyed all right,  title and interest for the
         benefit  of the  Holders,  under  the  terms  of an  irrevocable  trust
         agreement in form and  substance  satisfactory  to the Trustee as trust
         funds in trust,  specifically pledged to the Trustee for the benefit of
         the Holders as security for payment of the  principal of,  premium,  if
         any, and interest, if any, on the Securities,  and dedicated solely to,
         the benefit of the Holders,  in and to (1) money in an amount, (2) U.S.
         Government Obligations that, through the payment of interest,  premium,
         if any,  and  principal  in respect  thereof in  accordance  with their
         terms, will provide,  not later than one day before the due date of any
         payment  referred to in this  clause  (A),  money in an amount or (3) a
         combination  thereof  in an  amount  sufficient,  in the  opinion  of a
         nationally  recognized firm of independent public accountants expressed
         in a written certification thereof delivered to the Trustee, to pay and
         discharge,  without  consideration of the reinvestment of such interest
         and after  payment  of all  federal,  state  and  local  taxes or other
         charges and assessments in respect thereof payable by the Trustee,  the
         principal of, premium,  if any, and accrued interest on the outstanding
         Securities  at the Stated  Maturity or earlier  optional  redemption of
         such principal or interest;  provided,  however, that the Trustee shall
         have been irrevocably instructed to apply such money or the proceeds of
         such U.S.  Government  Obligations  to the  payment of such  principal,
         premium, if any, and interest with respect to the Securities;



<PAGE>


                                       59


                  (B) such deposit will not result in a breach or violation  of,
         or constitute a default under, this Indenture or any other agreement or
         instrument to which the Company is a party or by which it is bound;

                  (C)  immediately  after giving effect to such deposit on a pro
         forma basis,  no Default or Event of Default shall have occurred and be
         continuing  on the date of such  deposit;  and no  Default  or Event of
         Default  shall occur during the period  ending on the 123rd day (or one
         year) after such date of deposit;

                  (D) the Company shall have delivered to the Trustee (1) either
         (x) a ruling directed to the Trustee received from the Internal Revenue
         Service to the effect that the Holders will not recognize income,  gain
         or loss for federal  income tax  purposes as a result of the  Company's
         exercise of its option  under this  Section 8.02 and will be subject to
         federal income tax on the same amount and in the same manner and at the
         same  times as would  have  been the case if such  option  had not been
         exercised or (y) an Opinion of Counsel to the same effect as the ruling
         described  in clause (x) above  accompanied  by a ruling to that effect
         published  by the  Internal  Revenue  Service,  unless there has been a
         change in the applicable  federal income tax law since the date of this
         Indenture  such that a ruling from the Internal  Revenue  Service is no
         longer  required  and (2) an Opinion of Counsel to the effect  that (x)
         the creation of the  defeasance  trust does not violate the  Investment
         Company Act of 1940 and (y) after the passage of 123 days following the
         deposit (except, with respect to any trust funds for the account of any
         Holder who may be deemed to be an "insider"  for purposes of the United
         States  Bankruptcy  Code,  after one year  following the deposit),  the
         trust  funds will not be  subject  to the effect of Section  547 of the
         United States  Bankruptcy Code or Section 15 of the New York Debtor and
         Creditor Law in a case commenced by or against the Company under either
         such statute,  and either (i) the trust funds will no longer remain the
         property  of the  Company  (and  therefore  will not be  subject to the
         effect of any  applicable  bankruptcy,  insolvency,  reorganization  or
         similar laws affecting  creditors' rights generally) or (ii) if a court
         were to rule  under  any such law in any  case or  proceeding  that the
         trust funds  remained  property of the Company (a) assuming  such trust
         funds  remained in the  possession  of the Trustee  prior to such court
         ruling to the extent not paid to the  Holders,  the Trustee  will hold,
         for the benefit of the Holders, a valid and perfected security interest
         in such trust funds that is not  avoidable in  bankruptcy  or otherwise
         except for the effect of Section 552(b) of the United States Bankruptcy
         Code on interest on the trust funds accruing after the  commencement of
         a case under such  statute  and (b) the  Holders  will be  entitled  to
         receive  adequate  protection of their interests in such trust funds if
         such trust funds are used in such case or proceeding;

                  (E) if the Securities are then listed on a national securities
         exchange, the Company shall have delivered to the Trustee an Opinion of
         Counsel to the effect that such deposit  defeasance  and discharge will
         not cause the Securities to be delisted; and



<PAGE>


                                       60


                  (F) the Company  has  delivered  to the  Trustee an  Officers'
         Certificate  and an Opinion of Counsel,  in each case  stating that all
         conditions  precedent  provided for herein  relating to the  defeasance
         contemplated by this Section 8.02 have been complied with.

                  Notwithstanding the foregoing, prior to the end of the 123-day
(or one year) period referred to in clause  (D)(2)(y) of this Section 8.02, none
of  the  Company's   obligations  under  this  Indenture  shall  be  discharged.
Subsequent  to the end of such 123-day (or one year) period with respect to this
Section 8.02,  the Company's  obligations in Sections 2.02,  2.03,  2.04,  2.05,
2.06,  2.07, 2.11, 4.01, 4.02, 7.07, 7.08, 8.05 and 8.06 shall survive until the
Securities are no longer outstanding. Thereafter, only the Company's obligations
in Sections  7.07,  8.05 and 8.06 shall  survive.  If and when a ruling from the
Internal  Revenue Service or an Opinion of Counsel  referred to in clause (D)(1)
of this Section 8.02 may be provided  specifically without regard to, and not in
reliance upon, the continuance of the Company's  obligations under Section 4.01,
then the Company's obligations under such Section 4.01 shall cease upon delivery
to the  Trustee of such  ruling or Opinion of Counsel  and  compliance  with the
other  conditions  precedent  provided  for herein  relating  to the  defeasance
contemplated by this Section 8.02.

                  After any such irrevocable  deposit,  the Trustee upon written
request shall acknowledge in writing the discharge of the Company's  obligations
under the Securities and this Indenture  except for those surviving  obligations
in the immediately preceding paragraph. Such acknowledgment shall include, among
other things,  the fact that payment of the  Securities  may not be  accelerated
because  of an Event of  Default  and the  Securities  will no  longer  have the
benefit of the Security Documents or the Equipment Note Guarantee.

                  SECTION 8.03.  Defeasance of Certain Obligations.  The Company
may omit to comply with any term,  provision or  condition  set forth in clauses
(iii) and (iv) of Section 5.01 and Sections 4.03 through 4.24, and clause (c) of
Section 6.01 with respect to clauses (iii) and (iv) of Section 5.01 and Sections
4.03 through  4.24,  and clauses (d),  (e), (h) and (i) of Section 6.01 shall be
deemed not to be Events of Default  and the  Securities  will no longer have the
benefit of the Security Documents or the Equipment Note Guarantee,  in each case
with respect to the outstanding Securities if:

                  (i) with  reference  to this  Section  8.03,  the  Company has
         irrevocably  deposited or caused to be  irrevocably  deposited with the
         Trustee (or another  trustee  satisfying  the  requirements  of Section
         7.10) and conveyed all right, title and interest to the Trustee for the
         benefit  of the  Holders,  under  the  terms  of an  irrevocable  trust
         agreement in form and  substance  satisfactory  to the Trustee as trust
         funds in trust,  specifically pledged to the Trustee for the benefit of
         the Holders as security for payment of the  principal of,  premium,  if
         any, and interest, if any, on the Securities,  and dedicated solely to,
         the benefit of the Holders,  in and to (A) money in an amount, (B) U.S.
         Government  Obligations  that,  through  the  payment of  interest  and
         principal  in respect  thereof in  accordance  with their  terms,  will
         provide,  not later  than one day  before  the due date of any  payment
         referred to


<PAGE>


                                       61


         in this clause (i), money in an amount or (C) a combination  thereof in
         an amount sufficient, in the opinion of a nationally recognized firm of
         independent  public  accountants  expressed in a written  certification
         thereof  delivered  to the  Trustee,  to  pay  and  discharge,  without
         consideration of the reinvestment of such interest and after payment of
         all federal,  state and local taxes or other charges and assessments in
         respect thereof payable by the Trustee,  the principal of, premium,  if
         any, and interest on the outstanding  Securities on the Stated Maturity
         or earlier optional redemption of such principal or interest; provided,
         however,  that the Trustee  shall have been  irrevocably  instructed to
         apply such money or the proceeds of such U.S. Government Obligations to
         the payment of such  principal,  premium,  if any,  and  interest  with
         respect to the Securities;

                  (ii) such deposit will not result in a breach or violation of,
         or constitute a default under, this Indenture or any other agreement or
         instrument to which the Company is a party or by which it is bound;

               (iii) no Default or Event of Default  shall have  occurred and be
          continuing on the date of such deposit;

                  (iv) the  Company has  delivered  to the Trustee an Opinion of
         Counsel to the effect  that (A) the  creation of the  defeasance  trust
         does not violate the  Investment  Company Act of 1940,  (B) the Holders
         have a valid  first-priority  security interest in the trust funds, (C)
         the Holders will not recognize income,  gain or loss for federal income
         tax  purposes  as a result of such  deposit and the  defeasance  of the
         obligations referred to in the first paragraph of this Section 8.03 and
         will be  subject to  federal  income tax on the same  amount and in the
         same  manner  and at the same times as would have been the case if such
         deposit and  defeasance  had not  occurred and (D) after the passage of
         123 days following the deposit (except, with respect to any trust funds
         for the account of any Holder who may be deemed to be an "insider"  for
         purposes of the United States Bankruptcy Code, after one year following
         the  deposit),  the trust  funds  will not be  subject to the effect of
         Section 547 of the United States  Bankruptcy  Code or Section 15 of the
         New York Debtor and Creditor Law in a case  commenced by or against the
         Company under either such statute,  and either (1) the trust funds will
         no longer remain the property of the Company (and therefore will not be
         subject  to  the  effect  of  any  applicable  bankruptcy,  insolvency,
         reorganization  or similar laws affecting  creditors' rights generally)
         or (2) if a court  were to  rule  under  any  such  law in any  case or
         proceeding  that the trust funds  remained  property of the Company (x)
         assuming  such trust funds  remained in the  possession  of the Trustee
         prior to such court ruling to the extent not paid to the  Holders,  the
         Trustee  will  hold,  for the  benefit  of the  Holders,  a  valid  and
         perfected  security  interest in such trust funds that is not avoidable
         in bankruptcy or otherwise  (except for the effect of Section 552(b) of
         the  United  States  Bankruptcy  Code on  interest  on the trust  funds
         accruing after the commencement of a case under such statute),  (y) the
         Holders  will be  entitled  to  receive  adequate  protection  of their
         interests in such trust funds if such trust funds are used in such case
         or proceeding and (z)


<PAGE>


                                       62


         no  property,  rights in  property  or other  interests  granted to the
         Trustee or the Holders in exchange  for, or with respect to, such trust
         funds  will  be  subject  to any  prior  rights  of  holders  of  other
         Indebtedness of the Company or any of its Subsidiaries;

                  (v) if the Securities are then listed on a national securities
         exchange, the Company shall have delivered to the Trustee an Opinion of
         Counsel to the effect that such deposit  defeasance  and discharge will
         not cause the Securities to be delisted; and

                  (vi) the Company  has  delivered  to the Trustee an  Officers'
         Certificate  and an Opinion of Counsel,  in each case  stating that all
         conditions  precedent  provided for herein  relating to the  defeasance
         contemplated by this Section 8.03 have been complied with.

                  SECTION 8.04.  Application of Trust Money.  Subject to Section
8.06,  the Trustee or Paying Agent shall hold in trust money or U.S.  Government
Obligations  deposited  with it pursuant to Section  8.01,  8.02 or 8.03, as the
case may be,  and shall  apply  the  deposited  money  and the  money  from U.S.
Government  Obligations in accordance  with the Securities and this Indenture to
the payment of principal of,  premium,  if any, and interest on the  Securities;
but such money need not be  segregated  from  other  funds  except to the extent
required by law.

                  SECTION 8.05. Repayment to Company.  Subject to Sections 7.07,
8.01,  8.02 and 8.03, the Trustee and the Paying Agent shall promptly pay to the
Company upon request set forth in an Officers' Certificate any excess money held
by them at any time and  thereupon  shall be relieved  from all  liability  with
respect to such money. The Trustee and the Paying Agent shall pay to the Company
upon request any money held by them for the payment of  principal,  premium,  if
any, or interest that remains unclaimed for two years;  provided,  however, that
the Trustee or such Paying Agent before being required to make any payment shall
cause to be  published  at the  expense of the Company  once in a  newspaper  of
general  circulation in the City of New York or mail to each Holder  entitled to
such money at such  Holder's  address  (as set forth in the  Security  Register)
notice that such money remains unclaimed and that after a date specified therein
(which shall be at least 30 days from the date of such  publication  or mailing)
any  unclaimed  balance  of such  money  then  remaining  will be  repaid to the
Company. After payment to the Company,  Holders entitled to such money must look
to the  Company  for  payment  as general  creditors  unless an  applicable  law
designates  another  Person,  and all  liability  of the Trustee and such Paying
Agent with respect to such money shall cease.

                  SECTION 8.06. Reinstatement. If the Trustee or Paying Agent is
unable to apply any money or U.S.  Government  Obligations  in  accordance  with
Section  8.01,  8.02 or  8.03,  as the  case  may be,  by  reason  of any  legal
proceeding  or by reason of any order or judgment  of any court or  governmental
authority enjoining,  restraining or otherwise prohibiting such application, the
Company's  obligations  under this Indenture and the Securities shall be revived
and reinstated as though no deposit had occurred  pursuant to Section 8.01, 8.02
or 8.03,  as the case may be,  until such time as the Trustee or Paying Agent is
permitted to apply all such money or U.S.


<PAGE>


                                       63


Government  Obligations  in accordance  with Section 8.01,  8.02 or 8.03, as the
case may be;  provided,  however,  that,  if the Company has made any payment of
principal  of,  premium,  if any, or interest on any  Securities  because of the
reinstatement of its obligations,  the Company shall be subrogated to the rights
of the Holders of such Securities to receive such payment from the money or U.S.
Government Obligations held by the Trustee or Paying Agent.

                  SECTION 8.07.  Insiders.  With respect to the determination of
the Persons  constituting  beneficial  owners of Securities and whether any such
Person is an "insider" for purposes of Sections  8.02(D)(2)(y)  and 8.03(iv)(D),
the Trustee may rely on an Officers' Certificate.


                                  ARTICLE NINE
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

                  SECTION 9.01.  Without Consent of Holders.  The Company,  when
authorized by resolutions  of its Board of Directors,  and the Trustee may amend
or supplement this Indenture or the Securities  without notice to or the consent
of any Holder:

               (a) to  cure  any  ambiguity,  defect  or  inconsistency  in this
          Indenture;  provided,  however,  that such  amendments or  supplements
          shall  not  adversely  affect  the  interests  of the  Holders  in any
          material respect;

               (b) to comply with Article Five;

               (c) to comply with any requirements of the SEC in connection with
          the qualification of this Indenture under the TIA;

               (d) to evidence  and provide for the  acceptance  of  appointment
          hereunder by a successor Trustee; or

               (e) to make any  change  that,  in the  opinion  of the  Board of
          Directors  of the Company  evidenced by a Board  Resolution,  does not
          materially and adversely affect the rights of any Holder.

                  SECTION  9.02.  With  Consent of Holders.  Subject to Sections
6.04 and 6.07 and  without  prior  notice  to the  Holders,  the  Company,  when
authorized by its Board of Directors (as evidenced by a Board  Resolution),  and
the Trustee may amend this Indenture and the Securities with the written consent
of the  Holders  of a  majority  in  principal  amount  of the  Securities  then
outstanding, and the Holders of a majority in principal amount of the Securities
then outstanding by written notice to the Trustee may waive future compliance by
the Company with any provision of this Indenture or the Securities.


<PAGE>


                                       64



                  Notwithstanding  the provisions of this Section 9.02,  without
the consent of each Holder affected, an amendment or waiver,  including a waiver
pursuant to Section 6.04, may not:

                  (i) change the Stated  Maturity  of the  principal  of, or any
         installment  of  interest  on, any  Security,  or reduce the  principal
         amount thereof or the rate of interest  thereon or any premium  payable
         upon the redemption thereof, or adversely affect any right of repayment
         at the option of any Holder of any Security,  or the currency in which,
         any  Security or any  premium or the  interest  thereon is payable,  or
         impair  the right to  institute  suit for the  enforcement  of any such
         payment on or after the Stated  Maturity  thereof  (or,  in the case of
         redemption, on or after the Redemption Date);

                  (ii) reduce the percentage in principal  amount of outstanding
         Securities  the  consent  of whose  Holders  is  required  for any such
         supplemental  indenture,  for any  waiver of  compliance  with  certain
         provisions of this Indenture or certain Defaults and their consequences
         provided for in this Indenture;

               (iii) waive a Default in the payment of principal of, premium, if
          any, or interest on, any Security;

                  (iv) modify any of the provisions of this Section 9.02, except
         to  increase  any such  percentage  or to provide  that  certain  other
         provisions of this  Indenture  cannot be modified or waived without the
         consent of the Holder of each outstanding Security affected thereby; or

                  (v)  amend  the  Equipment  Note  Guarantee  or  the  Security
         Documents  or  otherwise  affect  the  interests  of any  Holder in the
         Collateral,  in each case in any  manner  that  adversely  affects  the
         rights of any Holder or the Trustee.

                  It shall not be necessary for the consent of the Holders under
this Section  9.02 to approve the  particular  form of any  proposed  amendment,
supplement or waiver,  but it shall be  sufficient if such consent  approves the
substance thereof.

                  After an  amendment,  supplement  or waiver under this Section
9.02 becomes effective, the Company shall mail to the Holders affected thereby a
notice briefly describing the amendment,  supplement or waiver. The Company will
mail supplemental indentures to Holders upon request. Any failure of the Company
to mail such  notice,  or any defect  therein,  shall not,  however,  in any way
impair or affect the validity of any such supplemental indenture or waiver.

                  SECTION  9.03.  Revocation  and  Effect of  Consent.  Until an
amendment  or  waiver  becomes  effective,  a  consent  to it by a  Holder  is a
continuing  consent by the Holder and every  subsequent  Holder of a Security or
portion  of a  Security  that  evidences  the same debt as the  Security  of the
consenting Holder, even if notation of the consent is not made on any Security.


<PAGE>


                                       65


However,  any such Holder or subsequent  Holder may revoke the consent as to its
Security or portion of its Security.  Such revocation shall be effective only if
the Trustee  receives the notice of  revocation  before the date the  amendment,
supplement or waiver becomes effective. An amendment, supplement or waiver shall
become  effective on receipt by the Trustee of written consents from the Holders
of the requisite percentage in principal amount of the outstanding Securities.

                  The Company may,  but shall not be obligated  to, fix a record
date for the  purpose of  determining  the  Holders  entitled  to consent to any
amendment,   supplement   or  waiver.   If  a  record   date  is  fixed,   then,
notwithstanding the last two sentences of the immediately  preceding  paragraph,
those  persons who were  Holders at such  record date (or their duly  designated
proxies) and only those persons shall be entitled to consent to such  amendment,
supplement or waiver or to revoke any consent  previously given,  whether or not
such  persons  continue to be Holders  after such record  date.  No such consent
shall be valid or effective for more than 90 days after such record date.

                  After an amendment, supplement or waiver becomes effective, it
shall bind every Holder unless it is of the type described in any of clauses (i)
through  (v) of  Section  9.02.  In case of an  amendment  or waiver of the type
described in clauses (i) through (v) of Section  9.02,  the  amendment or waiver
shall bind each Holder who has consented to it and every subsequent  Holder of a
Security that evidences the same  indebtedness as the Security of the consenting
Holder.

                  SECTION  9.04.  Notation on or Exchange of  Securities.  If an
amendment, supplement or waiver changes the terms of a Security, the Trustee may
require  the Holder to deliver  such  Security to the  Trustee.  The Trustee may
place an appropriate notation on the Security about the changed terms and return
it to the  Holder  and the  Trustee  may place an  appropriate  notation  on any
Security thereafter authenticated.  Alternatively, if the Company or the Trustee
so  determines,  the Company in exchange  for the  Security  shall issue and the
Trustee shall authenticate a new Security that reflects the changed terms.

                  SECTION  9.05.  Trustee to Sign  Amendments,  Etc. The Trustee
shall be entitled to receive,  and shall be fully  protected in relying upon, an
Opinion of Counsel  stating that the execution of any  amendment,  supplement or
waiver  authorized  pursuant to this Article Nine is  authorized or permitted by
this Indenture.  Subject to the preceding sentence,  the Trustee shall sign such
amendment, supplement or waiver if the same does not adversely affect the rights
of the Trustee. The Trustee may, but shall not be obligated to, execute any such
amendment, supplement or waiver that affects the Trustee's own rights, duties or
immunities under this Indenture or otherwise.

                  SECTION  9.06.  Conformity  with Trust  Indenture  Act.  Every
supplemental  indenture  executed pursuant to this Article Nine shall conform to
the requirements of the TIA as then in effect.


<PAGE>


                                       66




                                   ARTICLE TEN
                            EQUIPMENT NOTE GUARANTEE

                  SECTION 10.01.  Guarantee.  The Guarantor  unconditionally and
irrevocably  guarantees to each Holder and to the Trustee and its successors and
assigns (a) the full and  punctual  payment of  principal of and interest on the
Securities  when due,  whether at maturity,  by  acceleration,  by redemption or
otherwise,  and  all  other  monetary  obligations  of the  Company  under  this
Indenture and the  Securities and (b) the full and punctual  performance  within
applicable  grace  periods of all other  obligations  of the Company  under this
Indenture and the Securities (all the foregoing being  hereinafter  collectively
called the  "Guaranteed  Obligations").  The Guarantor  further  agrees that the
Guaranteed  Obligations may be extended or renewed, in whole or in part, without
notice or further assent from the Guarantor,  and that the Guarantor will remain
bound under this  Article Ten  notwithstanding  any  extension or renewal of any
Guaranteed Obligation.

                  The Guarantor waives  presentation to, demand of, payment from
and protest to the Company of any of the Guaranteed  Obligations and also waives
notice of protest for  nonpayment.  The  Guarantor  waives notice of any default
under the  Securities or the  Guaranteed  Obligations.  The  obligations  of the
Guarantor  hereunder  shall not be  affected by (a) the failure of any Holder or
the  Trustee  to assert  any claim or demand or to  enforce  any right or remedy
against the Company or any other Person under this Indenture,  the Securities or
any other agreement or other-

wise; (b) any extension or renewal of any thereof;  (c) any rescission,  waiver,
amendment or  modification  of any of the terms or provisions of this Indenture,
the Securities or any other  agreement;  (d) the release of any security held by
any Holder or the Trustee for the Guaranteed Obligations or any of them; (e) the
failure of any Holder or the Trustee to exercise any right or remedy against any
other  guarantor  of the  Guaranteed  Obligations;  or  (f)  any  change  in the
ownership of the Guarantor.

                  The  Guarantor   further  agrees  that  its  Guarantee  herein
constitutes a guarantee of payment, performance and compliance when due (and not
a guarantee  of  collection)  and waives any right to require that any resort be
had by any  Holder  or the  Trustee  to any  security  held for  payment  of the
Guaranteed Obligations.

                  Except as expressly set forth in Sections  8.02 and 8.03,  the
obligations  of the Guarantor  hereunder  shall not be subject to any reduction,
limitation,  impairment or  termination  for any reason,  including any claim of
waiver, release,  surrender,  alteration or compromise, and shall not be subject
to any defense of setoff, counterclaim,  recoupment or termination whatsoever or
by reason of the invalidity,  illegality or  unenforceability  of the Guaranteed
Obligations or otherwise.  Without limiting the generality of the foregoing, the
obligations  of the  Guarantor  herein  shall not be  discharged  or impaired or
otherwise  affected  by the  failure of any Holder or the  Trustee to assert any
claim or demand or to enforce any remedy under this Indenture, the Securities or
any other  agreement,  by any  waiver or  modification  of any  thereof,  by any
default,


<PAGE>


                                       67


failure or delay,  willful or otherwise,  in the performance of the obligations,
or by any other act or thing or  omission  or delay to do any other act or thing
which may or might in any manner or to any extent vary the risk of the Guarantor
or would otherwise operate as a discharge of the Guarantor as a matter of law or
equity.

                  The Guarantor  further agrees that its Guarantee  herein shall
continue to be  effective or be  reinstated,  as the case may be, if at any time
payment,  or any part  thereof,  of principal  of or interest on any  Guaranteed
Obligation  is  rescinded  or must  otherwise  be  restored by any Holder or the
Trustee upon the bankruptcy or reorganization of the Company or otherwise.

                  In  furtherance  of the foregoing and not in limitation of any
other right which any Holder or the Trustee has at law or in equity  against the
Guarantor by virtue hereof, upon the failure of the Company to pay the principal
of or interest on any  Guaranteed  Obligation  when and as the same shall become
due,  whether at maturity,  by acceleration,  by redemption or otherwise,  or to
perform or comply with any other  Guaranteed  Obligation,  the Guarantor  hereby
promises to and will,  upon receipt of written demand by the Trustee,  forthwith
pay, or cause to be paid, in cash, to the Holders or the Trustee an amount equal
to the sum of (i) the unpaid amount of such Guaranteed Obligations, (ii) accrued
and unpaid interest on such Guaranteed  Obligations  (but only to the extent not
prohibited by law) and (iii) all other  monetary  Guaranteed  Obligations of the
Company to the Holders and the Trustee.

                  The  Guarantor  agrees  that it shall not be  entitled  to any
right of subrogation in respect of any Guaranteed  Obligations guaranteed hereby
until  payment in full of all  Guaranteed  Obligations.  The  Guarantor  further
agrees that, as between it, on the one hand, and the Holders and the Trustee, on
the other hand, (x) the maturity of the Guaranteed Obligations guaranteed hereby
may  be  accelerated  as  provided  in  Article  Six  for  the  purposes  of the
Guarantor's  Guarantee  herein,  notwithstanding  any stay,  injunction or other
prohibition   preventing   such   acceleration  in  respect  of  the  Guaranteed
Obligations  guaranteed  hereby,  and (y) in the  event  of any  declaration  of
acceleration  of such  obligations  as provided in Article Six, such  Guaranteed
Obligations  (whether or not due and  payable)  shall  forthwith  become due and
payable by the Guarantor for the purposes of this Section.

                  The  Guarantor  also  agrees  to pay  any and  all  costs  and
expenses (including  reasonable  attorneys' fees) incurred by the Trustee or any
Holder in enforcing any rights under this Section.

                  SECTION 10.02.  Successors and Assigns. This Article Ten shall
be binding upon the Guarantor and its  successors and assigns and shall enure to
the benefit of the successors and assigns of the Trustee and the Holders and, in
the event of any transfer or  assignment of rights by any Holder or the Trustee,
the rights and privileges conferred upon that party in this Indenture and in the
Securities  shall  automatically  extend to and be vested in such  transferee or
assignee, all subject to the terms and conditions of this Indenture.


<PAGE>


                                       68



                  SECTION 10.03. No Waiver. Neither a failure nor a delay on the
part of either the  Trustee or the  Holders in  exercising  any right,  power or
privilege under this Article Ten shall operate as a waiver thereof,  nor shall a
single or partial exercise thereof preclude any other or further exercise of any
right, power or privilege.  The rights, remedies and benefits of the Trustee and
the Holders herein  expressly  specified are cumulative and not exclusive of any
other rights,  remedies or benefits which either may have under this Article Ten
at law, in equity, by statute or otherwise.

                  SECTION 10.04.  Modification.  No  modification,  amendment or
waiver of any provision of this Article Ten, nor the consent to any departure by
the Guarantor  therefrom,  shall in any event be effective unless the same shall
be in writing and signed by the Trustee,  and then such waiver or consent  shall
be effective only in the specific  instance and for the purpose for which given.
No notice to or demand on the  Guarantor in any case shall entitle the Guarantor
to any  other  or  further  notice  or  demand  in the  same,  similar  or other
circumstances.


                                 ARTICLE ELEVEN
                               SECURITY DOCUMENTS

                  SECTION  11.01.  Collateral  and  Security  Documents.  (a) To
secure the due and punctual payment of the obligations of the Company under this
Indenture and the Securities,  the Grantor, the Trustee and the Collateral Agent
have entered into the Security  Documents to create the security  interests  and
related matters.  The Trustee and the Company hereby  acknowledge and agree that
the  Collateral  Agent holds the  Collateral  in trust for the equal and ratable
benefit of the Holders and the Trustee and the other  parties  secured under the
Security Documents pursuant to the terms of the Security Documents.

                  (b) Each  Holder,  by  accepting  a Security,  authorizes  the
Collateral Agent to execute and deliver the Security Documents, agrees to all of
the terms and provisions of the Security  Documents,  as the same may be amended
from time to time pursuant to the provisions of the Security  Documents and this
Indenture,  and  authorizes  and  directs  the  Collateral  Agent to perform its
obligations  and exercise its rights under the Security  Documents in accordance
therewith;  provided,  however, that if any provisions of the Security Documents
limit, qualify or conflict with the duties imposed by the provisions of the TIA,
the TIA will control.

                  (c) As set forth in and  governed by the  Security  Documents,
the Collateral as now or hereafter  constituted  shall be held for the equal and
ratable  benefit of the Secured  Parties (as defined in the Security  Agreement)
without  preference,  priority or  distinction  of any thereof over any other by
reason of difference in time of issuance, sale or otherwise, as security for the
Secured  Obligations  (as  defined  in the  Security  Agreement).  As among  the
Holders,  the Collateral  shall be held for the equal and ratable benefit of the
Holders  without  preference,  priority or  distinction  of any thereof over any
other.


<PAGE>


                                       69



                  SECTION  11.02.  Release  of  Collateral.  Collateral  may  be
released  from the security  interest  created by the Security  Documents at any
time or from time to time in  accordance  with the  provisions  of the  Security
Documents.  The  release  of any  Collateral  from the terms  hereof  and of the
Security  Documents or the release of, in whole or in part, the Liens created by
the Security Documents,  will not be deemed to impair the Lien on the Collateral
in contravention of the provisions hereof if and to the extent the Collateral or
Liens are released pursuant to the applicable Security Documents and pursuant to
the  terms  of  this  Article  Eleven.  The  Trustee  and  each  of the  Holders
acknowledge  that a release of Collateral or a Lien strictly in accordance  with
the terms of the  Security  Documents  and of this  Article  Eleven  will not be
deemed for any  purpose to be an  impairment  of the Lien on the  Collateral  in
contravention  of the terms of this  Indenture.  To the extent  applicable,  the
Company and each  obligor on the  Securities  shall cause ss.  314(d) of the TIA
relating to the release of  property or  securities  from the Lien hereof and of
the Security  Documents to be complied with. Any certificate or opinion required
by ss.  314(d) of the TIA may be made by an  Officer of the  Company,  except in
cases which ss. 314(d) of the TIA requires that such  certificate  or opinion be
made by an independent person.

               SECTION 11.03.  Certificates and Opinions.  (a) The Company shall
          deliver to the Trustee:

                  (i)  promptly   after  the  execution  and  delivery  of  this
         Indenture,  an Opinion of Counsel either stating that in the opinion of
         such  counsel this  Indenture  and the  Security  Documents  (including
         financing statements or other instruments) grant to the Secured Parties
         a security  interest in the Collateral to the extent  described  herein
         and therein and that filings have been (or,  within four  Business Days
         following the Issue Date,  will be) made in each of the fifty states of
         the United States to record the existence of such security  interest or
         stating that in the opinion of such counsel no such action is necessary
         to make such security interest effective; and

                (ii) on or  before  March  1 of each  year,  (A) an  Opinion  of
         Counsel  either stating that in the opinion of such counsel such action
         has been taken with respect to the recording,  filing, re-recording and
         re-filing  of  such  of the  Security  Documents  (including  financing
         statements  or other  instruments)  as is  necessary  to  maintain  the
         security interest intended to be created thereby for the benefit of the
         Securityholders,  and reciting  the details of such action,  or stating
         that in the  opinion of such  counsel no such  action is  necessary  to
         maintain  such  security  interest  and (B) a  Status  Certificate  (as
         defined in the Security  Agreement) prepared by the Company and current
         in all respects as of such March 1.

                  (b) The Company shall comply with TIA ss. 314(d), relating to,
among other  matters,  the release of  Collateral  from the Lien of the Security
Documents and Officers'  Certificates or other documents regarding fair value of
the Collateral, to the extent such provisions are applicable. Any certificate or
opinion  required by TIA ss.  314(d) may be executed and delivered by an Officer
of the Company to the extent permitted by TIA ss. 314(d).


<PAGE>


                                       70




                                 ARTICLE TWELVE
                                  MISCELLANEOUS

               SECTION 12.01.  Trust Indenture Act of 1939. This Indenture shall
be subject to the  provisions  of the TIA that are required to be a part of this
Indenture and shall, to the extent applicable, be governed by such provisions.

               SECTION  12.02.  Notices.  Any notice or  communication  shall be
sufficiently  given if in  writing  and  delivered  in person or mailed by first
class mail addressed as follows:

                  if to the Company:

                           WinStar Equipment II Corp.
                           1577 Spring Hill Road
                           Sixth Floor
                           Vienna, Virginia 22182
                           Attention:  General Counsel

                  if to the Guarantor (or WCI):

                           WinStar Communications, Inc.
                           230 Park Avenue
                           New York, New York 10169
                           Attention: Chief Financial Officer

                  if to the Trustee:

                           United States Trust Company of New York
                           114 West 47th Street
                           New York, New York  10036-1532
                           Attention:  Corporate Trust Division

                  The  Company  or  the  Trustee  by  notice  to the  other  may
designate   additional  or  different   addresses  for  subsequent   notices  or
communications.

                  Any notice or communication mailed to a Holder shall be mailed
at the Company's  expense to such Holder's address as it appears on the Security
Register by first class mail and shall be  sufficiently  given to such Holder if
so mailed within the time prescribed. Copies of any such communication or notice
to a Holder shall also be mailed to the Trustee and each Agent at the same time.



<PAGE>


                                       71


                  Failure to mail a notice or  communication  to a Holder or any
defect in it shall not affect its  sufficiency  with  respect to other  Holders.
Except for a notice to the Trustee,  which is deemed  given only when  received,
and except as otherwise provided in this Indenture, if a notice or communication
is mailed in the  manner  provided  in this  Section  12.02,  it is duly  given,
whether or not the addressee receives it.

                  Where this Indenture  provides for notice in any manner,  such
notice may be waived in writing by the Person  entitled to receive  such notice,
either  before or after the event,  and such waiver shall be the  equivalent  of
such notice. Waivers of notice by Holders shall be in writing and filed with the
Trustee,  but such filing shall not be a condition  precedent to the validity of
any action taken in reliance upon such waiver.

                  In case by reason of the suspension of regular mail service or
by reason of any other  cause it shall be  impracticable  to give such notice by
mail,  then such  notification as shall be made with the approval of the Trustee
shall constitute a sufficient notification for every purpose hereunder.

                  SECTION  12.03.  Certificate  and  Opinion  as  to  Conditions
Precedent. Upon any request or application by the Company to the Trustee to take
any action under this Indenture, the Company shall furnish to the Trustee:

                  (i) an Officers'  Certificate  stating that, in the opinion of
         the signers,  all conditions  precedent,  if any,  provided for in this
         Indenture relating to the proposed action have been complied with; and

                  (ii) an Opinion of Counsel  stating  that,  in the  opinion of
         such Counsel, all such conditions precedent have been complied with.

                  SECTION 12.04.  Statements Required in Certificate or Opinion.
Each  certificate  or opinion  with  respect to  compliance  with a condition or
covenant provided for in this Indenture shall include:

               (i) a statement  that each person  signing  such  certificate  or
          opinion has read such covenant or condition and the definitions herein
          relating thereto;

               (ii)  a  brief  statement  as to  the  nature  and  scope  of the
          examination  or  investigation  upon  which the  statement  or opinion
          contained in such certificate or opinion is based;

               (iii) a statement  that,  in the opinion of each such person,  he
          has made such  examination or  investigation as is necessary to enable
          him to express an informed  opinion as to whether or not such covenant
          or condition has been complied with; and


<PAGE>


                                       72



               (iv) a  statement  as to whether or not,  in the  opinion of each
          such  person,  such  condition  or covenant  has been  complied  with;
          provided,  however,  that, with respect to matters of fact, an Opinion
          of Counsel may rely on an Officers'  Certificate  or  certificates  of
          public officials.

               SECTION 12.05. Rules by Trustee,  Paying Agent or Registrar.  The
Trustee may make reasonable rules for action by or at a meeting of Holders.  The
Paying Agent or Registrar may make reasonable rules for its functions.

                  SECTION  12.06.  Payment Date Other Than a Business Day. If an
Interest Payment Date,  Redemption Date,  Change of Control Payment Date, Excess
Proceeds Payment Date, Stated Maturity or date of maturity of any Security shall
not be a Business  Day,  then  payment of  principal  of,  premium,  if any,  or
interest  on such  Security,  as the case may be, need not be made on such date,
but may be made on the next  succeeding  Business  Day with the same  force  and
effect as if made on the Interest Payment Date,  Change of Control Payment Date,
Excess Proceeds  Payment Date, or Redemption  Date, or at the Stated Maturity or
date of maturity of such  Security;  provided,  however,  that no interest shall
accrue  for the period  from and after such  Interest  Payment  Date,  Change of
Control Payment Date,  Excess Proceeds  Payment Date,  Redemption  Date,  Stated
Maturity or date of maturity, as the case may be.

                  SECTION   12.07.   Governing   Law.  This  Indenture  and  the
Securities shall be governed by the laws of the State of New York, excluding (to
the extent  permissible by law) any rule of law that would cause the application
of the laws of any jurisdiction other than the State of New York.

                  SECTION 12.08. No Adverse  Interpretation of Other Agreements.
This  Indenture  may not be used to interpret  another  indenture,  loan or debt
agreement of the WCI or any of its  Subsidiaries.  Any such  indenture,  loan or
debt agreement may not be used to interpret this Indenture.

                  SECTION 12.09. No Recourse Against Others. No recourse for the
payment  of the  principal  of,  premium,  if  any,  or  interest  on any of the
Securities,  or for any claim based thereon or otherwise in respect thereof, and
no recourse under or upon any  obligation,  covenant or agreement of the Company
contained  in this  Indenture,  or in any of the  Securities,  or because of the
creation  of any  Indebtedness  represented  thereby,  shall be had  against any
incorporator, stockholder, officer, director, employee or controlling person, as
such,  of the  Company or of any  successor  Person  thereof  in such  capacity;
provided,  however,  that the foregoing shall not affect WCI's  obligations with
respect to the Equipment Note Guarantee;  it being expressly understood that all
such liability is hereby expressly waived and released as a condition of, and as
a  consideration  for,  the  execution  of this  Indenture  and the issue of the
Securities.



<PAGE>


                                       73


               SECTION 12.10. Successors.  All agreements of WCI and the Company
in this Indenture and the Securities shall bind their respective successors. All
agreements of the Trustee in this Indenture shall bind its successors.

               SECTION  12.11.  Duplicate  Originals.  The  parties may sign any
number of copies of this Indenture.  Each signed copy shall be an original,  but
all of them together represent the same agreement.

               SECTION  12.12.  Separability.  In  case  any  provision  in this
Indenture or in the Securities 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.

                  SECTION 12.13. Table of Contents,  Headings, Etc. The Table of
Contents,  Cross-Reference  Table and  headings of the  Articles and Sections of
this Indenture have been inserted for  convenience of reference only, are not to
be  considered  a part hereof and shall in no way modify or restrict  any of the
terms and provisions hereof.

                                   SIGNATURES

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Indenture to be duly executed, all as of the date first written above.


                                       WINSTAR EQUIPMENT II CORP.,
                                         as Issuer


                                       By:
                                          ---------------------------
                                           Name:
                                           Title:


                                       WINSTAR COMMUNICATIONS, INC.,
                                         as Guarantor


                                       By:
                                          ---------------------------
                                           Name:
                                           Title:




<PAGE>


                                       74


                                       UNITED STATES TRUST COMPANY OF
                                         NEW YORK, as Trustee


                                       By:
                                          ---------------------------
                                           Name:
                                           Title:





<PAGE>


                                       A-1


                                                                    EXHIBIT A


               [FACE OF EXCHANGE NOTE OR PRIVATE EXCHANGE NOTE] (1/2)

                           WINSTAR EQUIPMENT II CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

                                                             CUSIP _________
No. R-                                                            $_________




                  WINSTAR  EQUIPMENT  II  CORP.,  a  Delaware  corporation  (the
"Company",  which term  includes any successor  under the Indenture  hereinafter
referred  to),  for  value  received,  promises  to pay to  __________  , or its
registered assigns,  the principal sum of  ___________________  ($__________) on
March 15, 2004.

               Interest  Payment  Dates:  March 15 and September 15,  commencing
          September 15, 1997.

               Regular Record Dates: March 1 and September 1.

               Reference is hereby made to the further  provisions  of this Note
set forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

- --------
1. If the  Security  is to be issued in global  form add the  Global  Securities
Legend from Exhibit 1 to the Rule  144A/Regulation S Appendix and the attachment
from such Exhibit I caption "[TO BE ATTACHED TO GLOBAL  SECURITIES]--SCHEDULE OF
INCREASES OR DECREASES IN GLOBAL SECURITY".

2. If the Security is a Private  Exchange  Security issued in a Private Exchange
to an Initial Purchaser holding an unsold portion of its initial allotment,  add
the Restricted  Securities  Legend from Exhibit I to the Rule  144A/Regulation S
Appendix  and  replace  the  Assignment  Form  included  in this  Exhibit A with
Assignment Form included in such Exhibit I.


<PAGE>


                                       A-2


         IN WITNESS  WHEREOF,  the  Company  has  caused  this Note to be signed
manually or by facsimile by its duly authorized officer.

                                             WINSTAR EQUIPMENT II CORP.


                                             By:
                                                ------------------------------
                                                Name:
                                                Title:


                (Form of Trustee's Certificate of Authentication)

             This is one of the 12 1/2% Guaranteed Senior Secured Notes Due 2004
described in the within-mentioned Indenture.


Date:__________________ , 1997               UNITED STATES TRUST COMPANY OF NEW
                                             YORK, as Trustee


                                             By:
                                                ------------------------------
                                                    Authorized Signatory



<PAGE>


                                       A-3


            [REVERSE SIDE OF EXCHANGE NOTE OR PRIVATE EXCHANGE NOTE]

                           WINSTAR EQUIPMENT II CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

1.  Principal and Interest.

                  The Company  will pay the  principal of this Note on March 15,
2004.

                  The Company  promises to pay interest on the principal  amount
of this Note on each Interest  Payment Date, as set forth below, at the rate per
annum shown above.

                  Interest  will be  payable  semiannually  (to the  holders  of
record of the  Notes at the close of  business  on the March 1 and  September  1
immediately  preceding  the relevant  Interest  Payment  Date) on each  Interest
Payment Date, commencing September 15, 1997.

                  Interest  on the  Notes  will  accrue  from  the  most  recent
Interest Payment Date; provided,  however, that, if there is no existing default
in the  payment of  interest  and this Note is  authenticated  between a Regular
Record  Date  referred to on the face  hereof and the next  succeeding  Interest
Payment Date,  interest shall accrue from such Interest  Payment Date.  Interest
will be  computed  on the  basis of a  360-day  year of  twelve  30-day  months.
Notwithstanding  the above,  (i) if a  Registration  Default  (as defined in the
Registration  Rights Agreement) occurs,  additional interest will accrue on this
Note at a rate of 0.50% per annum from and  including the date on which any such
Registration Default shall occur to but excluding the earlier of (x) the date on
which all  Registration  Defaults  have been cured and (y) the date on which all
Notes become freely transferable by Holders other than Affiliates of the Company
without further registration under the Securities Act.

                  The  Company  shall pay  interest  on  overdue  principal  and
premium, if any, and (to the extent lawful) interest on overdue  installments of
interest.

2.  Method of Payment.

         The Company will pay principal as provided  above and interest  (except
defaulted  interest) on the principal  amount of the Notes as provided  above on
each March 15 and  September 15 to the persons who are Holders (as  reflected in
the  Security  Register at the close of business on the March 1 and  September 1
immediately preceding the relevant Interest Payment Date), in each case, even if
the Note is cancelled on  registration  of transfer or  registration of exchange
after such record date; provided,  however, that, with respect to the payment of
principal,  the Company will not make payment to the Holder  unless this Note is
surrendered to a Paying Agent.



<PAGE>


                                       A-4


         The  Company  will pay  principal  and  interest in money of the United
States  that at the time of  payment is legal  tender for  payment of public and
private  debts.  Payments in respect of the Notes  represented  by a global Note
(including  principal,  premium and  interest)  will be made by wire transfer of
immediately  available funds to the accounts  specified by The Depository  Trust
Company.  The Company will make all payments in respect of a  certificated  Note
(including principal, premium and interest) by mailing a check to the registered
address  of  each  Holder  thereof;  provided,   however,  that  payments  on  a
certificated  Note  will  be  made by wire  transfer  to a U.S.  dollar  account
maintained  by the payee with a bank in the United  States if such Holder elects
payment by wire transfer by giving  written  notice to the Trustee or the Paying
Agent to such effect  designating such account no later than 30 days immediately
preceding  the  relevant due date for payment (or such other date as the trustee
may accept in its discretion).

3.  Paying Agent and Registrar.

                  Initially,  United  States  Trust  Company  of New  York  (the
"Trustee") will act as  authenticating  agent,  Paying Agent and Registrar.  The
Company may change any authenticating  agent,  Paying Agent or Registrar without
notice.  The Company,  any Subsidiary or any Affiliate of any of them may act as
Paying Agent, Registrar or co-Registrar.

4.  Indenture.

                  The Company  issued the Notes under an  Indenture  dated as of
August 1, 1997 (the  "Indenture"),  among the Company,  WinStar  Communications,
Inc., as guarantor (the "Guarantor"),  and the Trustee. Capitalized terms herein
are used as defined in the Indenture  unless otherwise  indicated.  The terms of
the Notes  include  those  stated in the  Indenture  and those  made part of the
Indenture by reference to the Trust  Indenture Act. The Notes are subject to all
such terms,  and Holders are referred to the Indenture  and the Trust  Indenture
Act for a statement of all such terms.  To the extent  permitted  by  applicable
law,  in the event of any  inconsistency  between the terms of this Note and the
terms of the Indenture, the terms of the Indenture shall control.

                  The Notes are secured senior indebtedness of the Company.  The
Indenture  limits  the  original  aggregate  principal  amount  of the  Notes to
$50,000,000 (subject to Section 2.07 of the Indenture).

5.  Optional Redemption.

                  The Notes  will not be  redeemable  prior to March  15,  2002.
Thereafter,  the Notes will be redeemable,  at the Company's option, in whole at
any time or in part  from time to time on or after  March 15,  2002 and prior to
maturity,  upon not less than 30 nor more than 60 days' prior  notice  mailed by
first-class  mail to each  Holders'  last  address as it appears in the Security
Register,  at the following  Redemption Prices (expressed as a percentage of the
principal amount


<PAGE>


                                       A-5


of the Notes,  plus accrued and unpaid  interest,  if any, on such amount to the
Redemption  Date  (subject  to the right of  Holders  of record on the  relevant
Regular  Record  Date  that is on or prior  to the  Redemption  Date to  receive
interest  due on the  relevant  Interest  Payment  Date if  redeemed  during the
12-month period commencing on March 15 of the years set forth below:

                  Year                                      Redemption Price
                  ----                                      ----------------
                  2002                                          106.250%
                  2003 and thereafter                           103.125%

6.  Mandatory Redemption.

                  In the event that by August 8,  1999,  the  Company  shall not
have applied at least $50.0 million to fund the Acquisition  Costs of Designated
Equipment  pursuant to the Indenture  ($50.0  million less the amount so applied
being herein  called the "Unused  Equipment  Amount"),  the Company shall redeem
Notes in an aggregate principal amount equal to the Unused Equipment Amount at a
Redemption  Price of 112.5% of such  principal  amount,  plus accrued and unpaid
interest  thereon to the  Redemption  Date  (subject  to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to  receive  interest  due on the  relevant  Interest  Payment  Date).  The
mandatory redemption shall occur no later than August 23, 1999.

                  Selection of the Notes for mandatory  redemption  will be made
on a pro rata  basis;  provided,  however,  that no Note of $1,000 in  principal
amount or less shall be  redeemed  in part.  If any Notes are to be  redeemed in
part  only,  a new Note in  principal  amount  equal to the  unredeemed  portion
thereof will be issued in the name of the Holder  thereof upon  cancellation  of
the original Note.

7.  Notice of Redemption.

                  Notice  of any  optional  redemption  will  be  mailed  by the
Company at least 30 days but not more than 60 days before a Redemption Date, and
notice of a  mandatory  redemption  will be mailed  by the  Company  at least 10
Business  Days but not more than 15 Business  Days before a Redemption  Date, in
each case,  to each  Holder of Notes to be  redeemed  at his last  address as it
appears in the Security Register.  Notes in original  denominations  larger than
$1,000  may be  redeemed  in part;  provided,  however,  that Notes will only be
issued  in  denominations  of $1,000  principal  amount  or  integral  multiples
thereof.  On and after the Redemption  Date,  interest ceases to accrue on Notes
(or portions of Notes) called for redemption, unless the Company defaults in the
payment of the Redemption Price.

8.  Repurchase upon Change in Control.



<PAGE>


                                       A-6


                  Upon the occurrence of a Change of Control,  each Holder shall
have the right to require  the  repurchase  of its Notes by the  Company in cash
pursuant to the offer  described in the  Indenture at a purchase  price equal to
101% of the  principal  amount  of such  Notes on such  date of  purchase,  plus
accrued and unpaid interest, if any, on such amount to the date of purchase (the
"Change of Control Payment").

                  A notice of such  Change of Control  will be mailed  within 30
days after any Change of Control occurs to each Holder at his last address as it
appears in the Security Register.  Notes in original  denominations  larger than
$1,000 may be sold to the Company in part;  provided,  however,  that Notes will
only be issued  in  denominations  of $1,000  principal  amount at  maturity  or
integral  multiples  thereof.  On and after the Change of Control  Payment Date,
interest ceases to accrue on Notes or portions of Notes surrendered for purchase
by the  Company,  unless the  Company  defaults  in the payment of the Change of
Control Payment.

9.  Guarantee.

                  The Notes are guaranteed on a senior  unsubordinated  basis by
the Guarantor to the extent provided in the Indenture.

10.  Collateral and Security Documents.

                  To secure the due and punctual  payment of the  principal  of,
premium if any, and interest on the Notes and all other  amounts  payable by the
Company  under the Indenture and the Notes when and as the same shall be due and
payable,  whether at maturity,  by  acceleration  or otherwise,  the Grantor has
granted  security  interests in the Collateral to the  Collateral  Agent for the
benefit of the Holders of Notes pursuant to the Security Documents.

11.  Denominations; Transfer; Exchange.

                  The  Notes  are  in   registered   form  without   coupons  in
denominations of $1,000 of principal amount and integral  multiples  thereof.  A
Holder may  register the  transfer or exchange of Notes in  accordance  with the
Indenture.  The Registrar may require a Holder,  among other things,  to furnish
appropriate  endorsements  and transfer  documents and to pay any taxes and fees
required by law or permitted by the  Indenture.  The Registrar need not register
the transfer or exchange of any Notes selected for redemption. Also, it need not
register  the transfer or exchange of any Notes for a period of 15 days before a
selection of Notes to be redeemed is made.

12.  Persons Deemed Owners.

                  A  Holder  shall  be  treated  as the  owner of a Note for all
purposes.

13.  Unclaimed Money.


<PAGE>


                                       A-7



                  If money for the  payment of  principal,  premium,  if any, or
interest remains  unclaimed for two years, the Trustee and the Paying Agent will
pay the money back to the Company at its request.  After that,  Holders entitled
to the money must look to the  Company for  payment,  unless an  applicable  law
designates  another  Person,  and all  liability  of the Trustee and such Paying
Agent with respect to such money shall cease.

14.  Discharge Prior to Redemption or Maturity.

                  Subject to certain conditions,  the Company may terminate some
or all of its  obligations  under the  Notes,  the  Indenture  and the  Security
Documents,  and the Guarantor may terminate its obligations  under the Equipment
Note  Guarantee,  if the  Company  deposits  with  the  Trustee  money  or  U.S.
Government Obligations for the payment of principal and interest on the Notes to
redemption or maturity, as the case may be.

15.  Amendment; Supplement; Waiver.

                  Subject to certain exceptions,  the Indenture or the Notes may
be  amended  or  supplemented  with the  consent  of the  Holders  of at least a
majority in  principal  amount of the Notes then  outstanding,  and any existing
default or  compliance  with any provision may be waived with the consent of the
Holders  of  at  least  a  majority  in  principal  amount  of  the  Notes  then
outstanding. Without notice to or the consent of any Holder, the parties thereto
may amend or supplement the Indenture or the Notes to, among other things,  cure
any ambiguity,  defect or inconsistency and make any change that, in the opinion
of the Board of Directors  of the Company,  does not  materially  and  adversely
affect the rights of any Holder.

16.  Restrictive Covenants.

                  The Indenture  imposes  certain  limitations on the ability of
the  Guarantor and its  Restricted  Subsidiaries,  among other things,  to incur
additional  indebtedness;  create liens; engage in sale-leaseback  transactions;
pay  dividends or make  distributions  in respect of their capital  stock;  make
investments or make certain other  restricted  payments;  sell assets;  issue or
sell stock of Restricted Subsidiaries; enter into transactions with stockholders
or affiliates;  or, with respect to the Company, to incur any indebtedness other
than the  Notes;  engage  in any  other  business  activities;  apply  the gross
proceeds  from  the sale of the  Notes to uses  other  than the  acquisition  of
Designated  Equipment;  fail to take  action to vest a security  interest in the
Designated  Equipment  in the  Trustee;  fail to file proper  UCC-1s and UCC-3s;
consolidate,  merge or sell all or  substantially  all of its assets.  Within 90
days after the end of the last fiscal  quarter of each year,  the  Company  must
report to the Trustee on compliance with such limitations.



<PAGE>


                                       A-8


17.  Successor Persons.

                  Generally, when a successor person or other entity assumes all
the  obligations  of its  predecessor  under the Notes  and the  Indenture,  the
predecessor person will be released from those obligations.

18.  Defaults and Remedies.

                  The following events constitute  "Events of Default" under the
Indenture:  (a) default in the payment of principal of (or premium,  if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise;  (b)  default in the  payment of  interest  on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company or WCI defaults in the performance of or breaches any other covenant
or  agreement  of the Company or WCI in the  Indenture or under the Notes or the
Security  Documents  and such  default  or breach  continues  for a period of 30
consecutive  days after  written  notice by the Trustee or the Holders of 25% or
more in aggregate  principal  amount of the Notes; (d) there occurs with respect
to any issue or  issues of  Indebtedness  of WCI or any  Significant  Subsidiary
having an outstanding  principal  amount of $25,000,000 or more in the aggregate
for all such issues of all such Persons, whether such Indebtedness now exists or
shall  hereafter be created,  (i) an event of default that has caused the holder
thereof to declare such  Indebtedness  to be due and payable prior to its Stated
Maturity  and  such  Indebtedness  has  not  been  discharged  in  full  or such
acceleration  has  not  been  rescinded  or  annulled  within  30  days  of such
acceleration  and/or (ii) the  failure to make a principal  payment at the final
(but not any interim) fixed  maturity and such defaulted  payment shall not have
been made,  waived or extended within 30 days of such payment  default;  (e) any
final  judgment or order (not covered by insurance)  for the payment of money in
excess of  $25,000,000  in the aggregate for all such final  judgments or orders
against all such Persons (treating any deductibles,  self-insurance or retention
as not so covered) shall be rendered  against WCI or any Significant  Subsidiary
and  shall  not be paid or  discharged,  and  there  shall be any  period  of 60
consecutive  days following entry of the final judgment or order that causes the
aggregate amount for all such final judgments or orders outstanding and not paid
or discharged against all such Persons to exceed $25,000,000 during which a stay
of enforcement of such final judgment or order, by reason of a pending appeal or
otherwise,  shall  not be in  effect;  (f) a court  having  jurisdiction  in the
premises  enters a decree  or order  for (i)  relief  in  respect  of WCI or any
Significant  Subsidiary in an involuntary case under any applicable  bankruptcy,
insolvency or other similar law now or hereafter in effect,  (ii) appointment of
a receiver,  liquidator,  assignee,  custodian, trustee, sequestrator or similar
official of WCI or any Significant Subsidiary or for all or substantially all of
the  property  and  assets  of WCI or any  Significant  Subsidiary  or (iii) the
winding up or  liquidation of the affairs of WCI or any  Significant  Subsidiary
and, in each case,  such decree or order shall remain unstayed and in effect for
a period of 60 consecutive  days; or (g) WCI or any  Significant  Subsidiary (i)
commences a voluntary case under any applicable bankruptcy,  insolvency or other
similar law now or hereafter in effect, or consents to the entry of an order for
relief in an involuntary case under any such law, (ii) consents


<PAGE>


                                       A-9


to the appointment of or taking possession by a receiver, liquidator,  assignee,
custodian,  trustee,  sequestrator or similar official of WCI or any Significant
Subsidiary or for all or substantially  all of the property and assets of WCI or
any  Significant  Subsidiary  or (iii)  effects any general  assignment  for the
benefit of creditors; (h) any of the provisions of the Indenture relating to the
Security Documents or the Security Documents shall cease to be in full force and
effect or shall cease to give the secured parties the Liens,  rights,  power and
privileges  purported to be created thereby; or (i) the Equipment Note Guarantee
shall cease to be in full force and effect  (other than in  accordance  with its
terms) or the  Guarantor  shall  deny or  disaffirm  its  obligations  under the
Equipment Note Guarantee.

         If an Event of Default  (other  than an Event of Default  specified  in
clause (f) or (g) above that occurs  with  respect to the Company or WCI) occurs
and is continuing  under the  Indenture,  the Trustee or the Holders of at least
25% in aggregate  principal amount of the Notes,  then  outstanding,  by written
notice  to the  Company  (and to the  Trustee  if such  notice  is  given by the
Holders), may, and the Trustee at the request of such Holders shall, declare the
principal of, premium, if any, and accrued interest,  if any, on the Notes to be
immediately due and payable.  If a bankruptcy or insolvency default with respect
to the  Company  or any  Restricted  Subsidiary  occurs and is  continuing,  the
principal amount of the Notes automatically becomes due and payable. Holders may
not enforce the Indenture or the Notes except as provided in the Indenture.  The
Trustee  may  require  indemnity  satisfactory  to it  before  it  enforces  the
Indenture or the Notes.  Subject to certain  limitations,  Holders of at least a
majority  in  principal  amount of the Notes  then  outstanding  may  direct the
Trustee in its exercise of any trust or power.

19.  Trustee Dealings with Company.

                  The Trustee  under the  Indenture,  in its  individual  or any
other capacity, may make loans to, accept deposits from and perform services for
the Company or its  Affiliates  and may  otherwise  deal with the Company or its
Affiliates as if it were not the Trustee.

20.  No Recourse Against Others.

                  No incorporator,  stockholder,  officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such  obligations or their creation  provided,  however,  that the foregoing
shall not affect the Guarantor's  obligations with respect to the Equipment Note
Guarantee.  Each  Holder  by  accepting  a Note  waives  and  releases  all such
liability.  Such  waiver  and  release  are  part of the  consideration  for the
issuance of the Notes.



<PAGE>


                                      A-10


21.  Authentication.

                  This  Note   shall  not  be  valid   until  the   Trustee   or
authenticating  agent signs the certificate of  authentication on the other side
of this Note.

22.  Holders' Compliance with Registration Rights Agreement.

                  Each Holder of a Note, by acceptance hereof,  acknowledges and
agrees  to the  provisions  of the  Registration  Rights  Agreement,  including,
without   limitation,   the  obligations  of  the  Holders  with  respect  to  a
registration  and the  indemnification  of the  Company to the  extent  provided
therein.

23.  Abbreviations.

                  Customary abbreviations may be used in the name of a Holder or
an assignee,  such as: TEN COM (= tenants in common),  TEN ENT (= tenants by the
entireties),  JT TEN (= joint  tenants  with  right of  survivorship  and not as
tenants in common),  CUST (=  Custodian)  and U/G/M/A (= Uniform Gifts to Minors
Act).

24.  Governing Law.

                  The  Indenture  and the Notes shall be governed by the laws of
the State of New York,  excluding (to the extent permissible by law) any rule of
law that would cause the application of the laws of any jurisdiction  other than
the State of New York.

                  The Company will  furnish to any Holder upon  written  request
and  without  charge a copy of the  Indenture.  Requests  may be made to WinStar
Equipment II Corp., 1577 Spring Hill Road, Sixth Floor, Vienna,  Virginia 22182,
Attention: General Counsel.



<PAGE>


                                      A-11


                                 ASSIGNMENT FORM


I or we assign and transfer this Note to:



Please insert social security or other identifying number of assignee


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

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


Print or type name,  address and zip code of assignee  and  irrevocably  appoint
__________________, as agent, to transfer this Note on the books of the Company.

The agent may substitute another to act for him.

Dated  ____________                     Signed __________________________


(Sign exactly as name appears on the other side of this Note)


Signature Guarantee _________________________(3)

- --------
3. The Holder's  signature  must be  guaranteed by a member firm of a registered
national  securities  exchange  or of the  National  Association  of  Securities
Dealers,  Inc.,  a  commercial  bank  or  trust  company  having  an  office  or
correspondent  in the United States or an "eligible  guarantor  institution"  as
defined by Rule 17Ad-15 under the Exchange Act.


<PAGE>


                                      A-12


                       OPTION OF HOLDER TO ELECT PURCHASE


     If you wish to have this Note purchased by the Company  pursuant to Section
4.11 or Section 4.12 of the Indenture, check the Box:   |_|

     If you  wish to  have a  portion  of this  Note  purchased  by the  Company
pursuant to Section 4.11 or Section 4.12 of the Indenture,  state the amount (in
principal amount):
$__________________

Date: _________________

Your Signature: _____________________________________________________________
             (Sign exactly as your name appears on the other side of this Note)

Signature Guarantee:  ___________________________(4)



- --------
4. The Holder's  signature  must be  guaranteed by a member firm of a registered
national  securities  exchange  or of the  National  Association  of  Securities
Dealers,  Inc.,  a  commercial  bank  or  trust  company  having  an  office  or
correspondent  in the United States or an "eligible  guarantor  institution"  as
defined by Rule 17Ad-15 under the Exchange Act.


<PAGE>


                                      AP-1


                                               RULE 144A/REGULATION S APPENDIX



        FOR OFFERINGS TO QUALIFIED INSTITUTIONAL BUYERS PURSUANT TO RULE
         144A, INSTITUTIONAL "ACCREDITED INVESTORS" (AS DEFINED IN RULE
         501(A)(1), (2), (3) OR (7)) AND TO CERTAIN PERSONS IN OFFSHORE
                    TRANSACTIONS IN RELIANCE ON REGULATION S.

                   PROVISIONS RELATING TO INITIAL SECURITIES,
                           PRIVATE EXCHANGE SECURITIES
                             AND EXCHANGE SECURITIES

         1. Definitions

         1.1  Definitions

         For the purposes of this  Appendix the  following  terms shall have the
meanings indicated below:

                  "Definitive  Security" means a certificated  Initial  Security
bearing the restricted  securities  legend set forth in Section 2.3(d) and which
is held by an IAI in accordance with Section 2.1(c).

                  "Depositary" means The Depository Trust Company,  its nominees
and their respective successors.

                  "Exchange  Securities"  means  the 12 1/2%  Guaranteed  Senior
Secured  Notes Due 2004 to be issued  pursuant to this  Indenture in  connection
with a Registered Exchange Offer pursuant to the Registration Rights Agreement.

                  "IAI"  means  an   institutional   "accredited   investor"  as
described  in Rule  501(a)(1),  (2),  (3) or (7)  under the  Securities  Act and
Regulation D promulgated thereunder.

                    "Initial   Purchasers"  means  Credit  Suisse  First  Boston
Corporation and BT Securities Corporation.

                  "Initial  Securities"  means  the 12  1/2%  Guaranteed  Senior
Secured Notes Due 2004, issued under this Indenture on or about the date hereof.

                  "Private Exchange" means the offer by the Company, pursuant to
the  Registration  Rights  Agreement,  to the  Initial  Purchasers  to issue and
deliver to each Initial Purchaser, in


<PAGE>


                                      AP-2


exchange for the Initial Securities held by the Initial Purchaser as part of its
initial  distribution,  a like aggregate  principal  amount of Private  Exchange
Securities.

                  "Private  Exchange  Securities"  means the 12 1/2%  Guaranteed
Senior  Secured  Notes Due 2004 to be issued  pursuant to this  Indenture to the
Initial Purchasers in a Private Exchange.

                  "Purchase Agreement" means the Purchase Agreement dated August
8, 1997, among the Company and the Initial Purchasers.

                  "QIB" means a  "qualified  institutional  buyer" as defined in
Rule 144A under the Securities Act.

                  "Registered  Exchange  Offer"  means the offer by the Company,
pursuant to the  Registration  Rights  Agreement,  to certain Holders of Initial
Securities,  to issue and deliver to such  Holders,  in exchange for the Initial
Securities,  a like aggregate principal amount of Exchange Securities registered
under the Securities Act.

                  "Registration  Rights Agreement" means the Registration Rights
Agreement dated August 8, 1997, among the Company, the Guarantor and the Initial
Purchasers.

                  "Securities"  means  the  Initial  Securities,   the  Exchange
Securities and the Private Exchange Securities, treated as a single class.

                  "Securities Act" means the Securities Act of 1933.

                  "Securities  Custodian"  means the custodian with respect to a
Global  Security  (as  appointed by the  Depositary),  or any  successor  person
thereto and shall initially be the Trustee.

                  "Shelf   Registration   Statement"   means  the   registration
statement  issued  by the  Company,  in  connection  with the  offer and sale of
Initial Securities or Private Exchange Securities,  pursuant to the Registration
Rights Agreement.

                  "Transfer Restricted  Securities" means Definitive  Securities
and Securities that bear or are required to bear the legend set forth in Section
2.3(d) hereto.



<PAGE>


                                      AP-3




         1.2  Other Definitions

                                                                 Defined in
     Term                                                         Section:

"Agent Members".....................................................2.1(b)
"Global Security"...................................................2.1(a)
"Regulation S"......................................................2.1(a)
"Rule 144A".........................................................2.1(a)

         2.       The Securities.

         2.1  Form and Dating.

                  The  Initial  Securities  are  being  offered  and sold by the
Company pursuant to the Purchase Agreement.

     (a) Global  Securities.  Initial  Securities  offered  and sold to a QIB in
reliance on Rule 144A under the  Securities  Act ("Rule 144A") or in reliance on
Regulation S under the Securities Act ("Regulation S"), in each case as provided
in the Purchase Agreement,  shall be issued initially in the form of one or more
permanent  global  Securities  in  definitive,  fully  registered  form  without
interest  coupons with the global  securities  legend and restricted  securities
legend set forth in Exhibit 1 hereto (each, a "Global Security"), which shall be
deposited  on behalf of the  purchasers  of the Initial  Securities  represented
thereby  with  the  Trustee,  at its  New  York  office,  as  custodian  for the
Depositary  (or with such other  custodian as the  Depositary  may direct),  and
registered in the name of the  Depositary or a nominee of the  Depositary,  duly
executed  by the  Company  and  authenticated  by  the  Trustee  as  hereinafter
provided.  The aggregate  principal amount at maturity of the Global  Securities
may from time to time be  increased  or  decreased  by  adjustments  made on the
records  of the  Trustee  and  the  Depositary  or its  nominee  as  hereinafter
provided.

     (b) Book-Entry Provisions. This Section 2.1(b) shall apply only to a Global
Security deposited with or on behalf of the Depositary.

                  The Company shall execute and the Trustee shall, in accordance
with this Section 2.1(b),  authenticate and deliver initially one or more Global
Securities  that (a) shall be registered in the name of the  Depositary for such
Global  Security or Global  Securities or the nominee of such Depositary and (b)
shall be  delivered  by the  Trustee  to such  Depositary  or  pursuant  to such
Depositary's   instructions  or  held  by  the  Trustee  as  custodian  for  the
Depositary.


<PAGE>


                                      AP-4



                  Members  of,  or  participants  in,  the  Depositary   ("Agent
Members")  shall have no rights under this  Indenture with respect to any Global
Security  held on  their  behalf  by the  Depositary  or by the  Trustee  as the
custodian of the  Depositary or under such Global  Security,  and the Depositary
may be treated by the  Company,  the Trustee and any agent of the Company or the
Trustee  as the  absolute  owner  of  such  Global  Security  for  all  purposes
whatsoever.  Notwithstanding  the  foregoing,  nothing  herein shall prevent the
Company,  the  Trustee or any agent of the  Company or the  Trustee  from giving
effect to any written certification,  proxy or other authorization  furnished by
the Depositary or impair,  as between the Depositary and its Agent Members,  the
operation of customary  practices of such  Depositary  governing the exercise of
the rights of a holder of a beneficial interest in any Global Security.

                  (c)  Certificated  Securities.  Except  as  provided  in  this
Section  2.1 or Section 2.3 or 2.4,  owners of  beneficial  interests  in Global
Securities  will not be entitled to receive  physical  delivery of  certificated
Securities.  Purchasers of Initial Securities who are IAI's and are not QIBs and
did not  purchase  Initial  Securities  sold in  reliance on  Regulation  S will
receive Definitive  Securities;  provided,  however,  that upon transfer of such
Definitive  Securities to a QIB, such  Definitive  Securities  will,  unless the
Global Security has previously been exchanged, be exchanged for an interest in a
Global Security pursuant to the provisions of Section 2.3.

         2.2  Authentication.  The Trustee shall  authenticate and deliver:  (1)
Initial  Securities  for  original  issue in an  aggregate  principal  amount of
$50,000,000 and (2) Exchange Securities or Private Exchange Securities for issue
only  in a  Registered  Exchange  Offer  or a  Private  Exchange,  respectively,
pursuant to the Registration  Rights  Agreement,  for a like principal amount of
Initial  Securities,  in each case upon a written order of the Company signed by
two Officers or by an Officer and either an Assistant  Treasurer or an Assistant
Secretary of the Company.  Such order shall specify the amount of the Securities
to be authenticated and the date on which the original issue of Securities is to
be  authenticated  and  whether  the  Securities  are to be Initial  Securities,
Exchange  Securities or Private  Exchange  Securities.  The aggregate  principal
amount of Securities  outstanding at any time may not exceed  $50,000,000 except
as provided in Section 2.07 of this Indenture.

     2.3  Transfer  and  Exchange.  (a)  Transfer  and  Exchange  of  Definitive
Securities.  When  Definitive  Securities  are  presented to the  Registrar or a
co-registrar with a request:

     (x)  to register the transfer of such Definitive Securities; or

     (y)  to exchange such Definitive  Securities for an equal principal  amount
          of Definitive Securities of other authorized denominations,



<PAGE>


                                      AP-5


the Registrar or  co-registrar  shall register the transfer or make the exchange
as  requested  if its  reasonable  requirements  for such  transaction  are met;
provided,  however, that the Definitive  Securities  surrendered for transfer or
exchange:

                  (i)  shall  be  duly  endorsed  or  accompanied  by a  written
         instrument of transfer in form  reasonably  satisfactory to the Company
         and the Registrar or co-registrar,  duly executed by the Holder thereof
         or his attorney duly authorized in writing; and

                (ii) are being transferred or exchanged pursuant to an effective
         registration  statement under the Securities  Act,  pursuant to Section
         2.3(b) or pursuant to clause (A), (B) or (C) below, and are accompanied
         by the following additional information and documents, as applicable:

                           (A) if such Definitive Securities are being delivered
                  to the Registrar by a Holder for  registration  in the name of
                  such  Holder,  without  transfer,  a  certification  from such
                  Holder to that effect (in the form set forth on the reverse of
                  the Security); or

                           (B)  if  such   Definitive   Securities   are   being
                  transferred to the Company, a certification to that effect (in
                  the form set forth on the reverse of the Security); or

                           (C)  if  such   Definitive   Securities   are   being
                  transferred (w) pursuant to an exemption from  registration in
                  accordance  with  Rule  144;  or (x) in  reliance  on  another
                  exemption from the registration requirements of the Securities
                  Act: (i) a certification to that effect (in the form set forth
                  on the reverse of the Secu-

                  rity) and (ii) if the Company or  Registrar  so  requests,  an
                  opinion of counsel or other evidence  reasonably  satisfactory
                  to them as to the compliance with the  restrictions  set forth
                  in the legend set forth in Section 2.3(d)(i).

                  (b)  Restrictions  on Transfer of a Definitive  Security for a
Beneficial  Interest in a Global  Security.  A  Definitive  Security  may not be
exchanged  for  a  beneficial   interest  in  a  Global   Security  except  upon
satisfaction of the requirements set forth below. Upon receipt by the Trustee of
a Definitive Security,  duly endorsed or accompanied by appropriate  instruments
of transfer, in form satisfactory to the Trustee, together with:

                  (i) certification, in the form set forth on the reverse of the
         Security,  that such Definitive  Security is being transferred (A) to a
         QIB in  accordance  with Rule 144A, or (B) outside the United States in
         an  offshore  transaction  within the  meaning of  Regulation  S and in
         compliance with Rule 904 under the Securities Act; and



<PAGE>


                                      AP-6


             (ii)  written  instructions  directing  the Trustee to make,  or to
         direct the Securities Custodian to make, an adjustment on its books and
         records with respect to such Global  Security to reflect an increase in
         the aggregate  principal  amount of the  Securities  represented by the
         Global Security, such instructions to contain information regarding the
         Depositary account to be credited with such increase,

then the Trustee shall cancel such Definitive  Security and cause, or direct the
Securities Custodian to cause, in accordance with the standing  instructions and
procedures  existing  between the Depositary and the Securities  Custodian,  the
aggregate  principal amount of Securities  represented by the Global Security to
be increased by the aggregate  principal amount of the Definitive Security to be
exchanged  and shall credit or cause to be credited to the account of the Person
specified  in such  instructions  a beneficial  interest in the Global  Security
equal to the principal  amount of the  Definitive  Security so cancelled.  If no
Global Securities are then outstanding,  the Company shall issue and the Trustee
shall  authenticate,  upon  written  order  of the  Company  in the  form  of an
Officers'  Certificate,  a new  Global  Security  in the  appropriate  principal
amount.

                  (c)  Transfer  and  Exchange  of  Global  Securities.  (i) The
transfer and exchange of Global Securities or beneficial interests therein shall
be effected through the Depositary, in accordance with this Indenture (including
applicable restrictions on transfer set forth herein, if any) and the procedures
of the Depositary  therefor.  A transferor of a beneficial  interest in a Global
Security shall deliver to the Registrar a written order given in accordance with
the Depositary's  procedures  containing  information  regarding the participant
account of the  Depositary  to be  credited  with a  beneficial  interest in the
Global  Security.  The Registrar  shall, in accordance  with such  instructions,
instruct the Depositary to credit to the account of the Person specified in such
instructions  a  beneficial  interest  in the Global  Security  and to debit the
account of the Person making the transfer the beneficial  interest in the Global
Security being transferred.

                (ii)   Notwithstanding   any  other   provisions  of  this  Rule
         144A/Regulation  S Appendix  (other  than the  provisions  set forth in
         Section  2.4),  a Global  Security  may not be  transferred  as a whole
         except by the Depositary to a nominee of the Depositary or by a nominee
         of  the  Depositary  to  the  Depositary  or  another  nominee  of  the
         Depositary  or by the  Depositary  or any such  nominee to a  successor
         Depositary or a nominee of such successor Depositary.

              (iii)  In the  event  that a  Global  Security  is  exchanged  for
         Securities  in  definitive  registered  form pursuant to Section 2.4 or
         Section 2.09 of the Indenture prior to the consummation of a Registered
         Exchange Offer or the effectiveness of a Shelf  Registration  Statement
         with respect to such Securities,  such Securities may be exchanged only
         in accordance with such procedures as are substantially consistent with
         the  provisions  of  this  Section  2.3  (including  the  certification
         requirements set forth on


<PAGE>


                                      AP-7


         the  reverse of the  Initial  Securities  intended  to ensure that such
         transfers  comply with Rule 144A or  Regulation  S, as the case may be)
         and such  other  procedures  as may from time to time be adopted by the
         Company.

                  (d)  Legends.

                  (i) Except as  permitted  by the  following  paragraphs  (ii),
         (iii)  and  (iv),  each  Security  certificate  evidencing  the  Global
         Securities and the Definitive  Securities (and all Securities issued in
         exchange  therefor or in  substitution  thereof) shall bear a legend in
         substantially the following form:

                  "THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
                  TRANSACTION  EXEMPT FROM REGISTRATION  UNDER THE UNITED STATES
                  SECURITIES  ACT OF  1933  (THE  "SECURITIES  ACT"),  AND  THIS
                  SECURITY MAY NOT BE OFFERED, SOLD, OR OTHERWISE TRANSFERRED IN
                  THE ABSENCE OF SUCH  REGISTRATION  OR AN APPLICABLE  EXEMPTION
                  THEREFROM.  EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED
                  THAT  THE  SELLER  OF  THIS  SECURITY  MAY BE  RELYING  ON THE
                  EXEMPTION  FROM THE  PROVISIONS OF SECTION 5 OF THE SECURITIES
                  ACT PROVIDED BY RULE 144A THEREUNDER.

                  THE  HOLDER OF THIS  SECURITY  AGREES  FOR THE  BENEFIT OF THE
                  COMPANY THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED
                  OR OTHERWISE  TRANSFERRED ONLY (i) TO A PERSON WHOM THE SELLER
                  REASONABLY BELIEVES IS A "QUALIFIED  INSTITUTIONAL  BUYER" (AS
                  DEFINED  IN  RULE  144A  UNDER  THE   SECURITIES   ACT)  IN  A
                  TRANSACTION  MEETING THE REQUIREMENTS OF RULE 144A, (ii) IN AN
                  OFFSHORE  TRANSACTION  IN  ACCORDANCE  WITH RULE 904 UNDER THE
                  SECURITIES   ACT,   (iii)   PURSUANT  TO  AN  EXEMPTION   FROM
                  REGISTRATION  UNDER THE  SECURITIES  ACT  PROVIDED BY RULE 144
                  THEREUNDER (IF AVAILABLE), (iv) TO THE ISSUER, OR (v) PURSUANT
                  TO AN EFFECTIVE  REGISTRATION  STATEMENT  UNDER THE SECURITIES
                  ACT, IN EACH OF CASES (i) THROUGH (v) IN  ACCORDANCE  WITH ANY
                  APPLICABLE  SECURITIES LAWS OF ANY STATE OF THE UNITED STATES,
                  AND (B)  THE  HOLDER  WILL,  AND  EACH  SUBSEQUENT  HOLDER  IS
                  REQUIRED TO,  NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF
                  THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

                  Each   Definitive   Security  will  also  bear  the  following
additional legend:


<PAGE>


                                      AP-8



                  "IN CONNECTION  WITH ANY TRANSFER,  THE HOLDER WILL DELIVER TO
                  THE REGISTRAR AND TRANSFER AGENT SUCH  CERTIFICATES  AND OTHER
                  INFORMATION AS SUCH TRANSFER  AGENT MAY REASONABLY  REQUIRE TO
                  CONFIRM  THAT  THE  TRANSFER   COMPLIES   WITH  THE  FOREGOING
                  RESTRICTIONS."

                  (ii)  Upon  any  sale or  transfer  of a  Transfer  Restricted
         Security (including any Transfer  Restricted Security  represented by a
         Global Security) pursuant to Rule 144 under the Securities Act:

                           (A) in the case of any Transfer  Restricted  Security
                  that is a Definitive Security,  the Registrar shall permit the
                  Holder thereof to exchange such Transfer  Restricted  Security
                  for a certificated  Security that does not bear the legend set
                  forth  above and rescind any  restriction  on the  transfer of
                  such Transfer Restricted Security; and

                           (B) in the case of any Transfer  Restricted  Security
                  that is represented by a Global Security,  the Registrar shall
                  permit the Holder thereof to exchange such Transfer Restricted
                  Security for a  certificated  Security  that does not bear the
                  legend set forth  above and  rescind  any  restriction  on the
                  transfer of such Transfer Restricted  Security,  if the Holder
                  certifies  in writing to the  Registrar  that its  request for
                  such   exchange  was  made  in  reliance  on  Rule  144  (such
                  certification  to be in the form set forth on the  reverse  of
                  the Security).

              (iii)  After a  transfer  of any  Initial  Securities  or  Private
         Exchange  Securities  during the period of the effectiveness of a Shelf
         Registration  Statement  with  respect to such  Initial  Securities  or
         Private  Exchange  Securities,  as the  case may be,  all  requirements
         pertaining to legends on such Initial Security or such Private Exchange
         Security  will  cease to apply,  the  requirements  requiring  any such
         Initial  Security or such Private  Exchange  Security issued to certain
         Holders  to be  issued  in  global  form  will  cease to  apply,  and a
         certificated  Initial  Security or Private  Exchange  Security  without
         legends  will be  available  to the  transferee  of the  Holder of such
         Initial Securities or Private Exchange Securities upon exchange of such
         transferring Holder's certificated Initial Security or Private Exchange
         Security or directions to transfer such Holder's interest in the Global
         Security, as applicable.

                (iv) Upon the  consummation of a Registered  Exchange Offer with
         respect to the Initial  Securities  pursuant  to which  Holders of such
         Initial  Securities  are offered  Exchange  Securities  in exchange for
         their Initial Securities,  all requirements  pertaining to such Initial
         Securities that Initial  Securities issued to certain Holders be issued
         in global form will cease to apply and certificated  Initial Securities
         with the  Restricted  Securities  Legend  set forth in Exhibit 1 hereto
         will be available to Holders of such


<PAGE>


                                      AP-9


         Initial Securities that do not exchange their Initial  Securities,  and
         Exchange Securities in certificated or global form will be available to
         Holders  that  exchange  such  Initial  Securities  in such  Registered
         Exchange Offer.

                  (v) Upon the  consummation of a Private  Exchange with respect
         to the Initial  Securities  pursuant to which  Holders of such  Initial
         Securities  are offered  Private  Exchange  Securities  in exchange for
         their Initial Securities,  all requirements  pertaining to such Initial
         Securities that Initial  Securities issued to certain Holders be issued
         in global form will still apply,  and Private  Exchange  Securities  in
         global form with the Restricted  Securities Legend set forth in Exhibit
         1 hereto  will be  available  to Holders  that  exchange  such  Initial
         Securities in such Private Exchange.

                  (e)  Cancellation  or Adjustment of Global  Security.  At such
time as all beneficial interests in a Global Security have either been exchanged
for certificated or Definitive  Securities,  redeemed,  repurchased or canceled,
such Global  Security shall be returned to the Depositary  for  cancellation  or
retained and canceled by the Trustee. At any time prior to such cancellation, if
any beneficial  interest in a Global  Security is exchanged for  certificated or
Definitive Securities,  redeemed,  repurchased or canceled, the principal amount
at maturity of Securities  represented by such Global  Security shall be reduced
and an  adjustment  shall be made on the books and records of the Trustee (if it
is then the Securities  Custodian for such Global Security) with respect to such
Global  Security,  by the Trustee or the Securities  Custodian,  to reflect such
reduction.

               (f)  Obligations  with  Respect to  Transfers  and  Exchanges  of
Securities.

                  (i) To permit  registrations  of transfers and exchanges,  the
         Company shall execute and the Trustee shall  authenticate  certificated
         Securities,   Definitive   Securities  and  Global  Securities  at  the
         Registrar's or co-registrar's request.

                (ii) No service  charge  shall be made for any  registration  of
         transfer or  exchange,  but the  Company  may require  payment of a sum
         sufficient   to  cover  any  transfer  tax,   assessments   or  similar
         governmental  charge  payable in connection  therewith  (other than any
         such transfer taxes, assessments or similar governmental charge payable
         upon exchange or transfer  pursuant to Sections  3.08,  4.11,  4.12 and
         9.04 of the Indenture).

              (iii) The  Registrar  or  co-registrar  shall not be  required  to
         register  the  transfer  of or  exchange  of (a)  any  certificated  or
         Definitive  Security  selected  for  redemption  in  whole  or in  part
         pursuant  to Article  Three of this  Indenture,  except the  unredeemed
         portion of any  certificated  or Definitive  Security being redeemed in
         part,  or (b) any  Security  for a period  beginning  15 Business  Days
         before the mailing of a notice of an


<PAGE>


                                      AP-10


         offer to repurchase or redeem  Securities or 15 Business Days before an
         interest payment date.

                (iv) Prior to the due  presentation for registration of transfer
         of any  Security,  the Company,  the  Trustee,  the Paying  Agent,  the
         Registrar  or any  co-registrar  may deem and treat the person in whose
         name a Security is  registered  as the absolute  owner of such Security
         for the purpose of  receiving  payment of  principal of and interest on
         such  Security and for all other  purposes  whatsoever,  whether or not
         such  Security is overdue,  and none of the Company,  the Trustee,  the
         Paying Agent,  the Registrar or any  co-registrar  shall be affected by
         notice to the contrary.

                  (v) All  Securities  issued  upon  any  transfer  or  exchange
         pursuant to the terms of this  Indenture  shall  evidence the same debt
         and shall be entitled to the same benefits  under this Indenture as the
         Securities surrendered upon such transfer or exchange.

                  (g)  No Obligation of the Trustee.

                  (i) The Trustee shall have no  responsibility or obligation to
         any beneficial owner of a Global Security, a member of or a participant
         in the  Depositary  or other Person with respect to the accuracy of the
         records  of the  Depositary  or its  nominee or of any  participant  or
         member thereof with respect to any ownership interest in the Securities
         or with respect to the delivery to any participant,  member, beneficial
         owner  or  other  Person  (other  than the  Depositary)  of any  notice
         (including any notice of redemption) or the payment of any amount under
         or with respect to such Securities.  All notices and  communications to
         be given to the  Holders and all  payments to be made to Holders  under
         the Securities  shall be given or made only to or upon the order of the
         registered Holders (which shall be the Depositary or its nominee in the
         case of a Global  Security).  The  rights of  beneficial  owners in any
         Global Security shall be exercised only through the Depositary  subject
         to the applicable  rules and procedures of the Depositary.  The Trustee
         may rely and  shall be fully  protected  in  relying  upon  information
         furnished by the Depositary  with respect to its members,  participants
         and any beneficial owners.

                (ii) The Trustee  shall have no  obligation  or duty to monitor,
         determine or inquire as to compliance with any restrictions on transfer
         imposed under this  Indenture or under  applicable  law with respect to
         any transfer of any interest in any Security  (including  any transfers
         between or among Depositary participants,  members or beneficial owners
         in any  Global  Security)  other  than  to  require  delivery  of  such
         certificates  and other  documentation  or  evidence  as are  expressly
         required by, and to do so if and when expressly  required by, the terms
         of this  Indenture,  and to examine the same to  determine  substantial
         compliance as to form with the express requirements hereof.


<PAGE>


                                      AP-11



         2.4  Certificated Securities.

                  (a) A Global  Security  deposited  with the Depositary or with
the Trustee as  custodian  for the  Depositary  pursuant to Section 2.1 shall be
transferred  to the  beneficial  owners  thereof  in the  form  of  certificated
Securities in an aggregate  principal  amount equal to the  principal  amount of
such  Global  Security,  in  exchange  for such  Global  Security,  only if such
transfer  complies with Section 2.3 and (i) the Depositary  notifies the Company
that it is  unwilling  or unable  to  continue  as  Depositary  for such  Global
Security  or if at any time such  Depositary  ceases to be a  "clearing  agency"
registered under the Exchange Act and a successor depositary is not appointed by
the  Company  within 90 days of such  notice,  or (ii) an Event of  Default  has
occurred  and is  continuing  or (iii)  the  Company,  in its  sole  discretion,
notifies  the  Trustee  in  writing  that it  elects to cause  the  issuance  of
certificated Securities under this Indenture.

                  (b) Any Global Security that is transferable to the beneficial
owners  thereof  pursuant to this Section shall be surrendered by the Depositary
to the Trustee located in the Borough of Manhattan,  The City of New York, to be
so transferred,  in whole or from time to time in part,  without charge, and the
Trustee shall  authenticate  and deliver,  upon such transfer of each portion of
such  Global  Security,  an equal  aggregate  principal  amount of  certificated
Initial Securities of authorized denominations. Any portion of a Global Security
transferred  pursuant  to this  Section  shall be  executed,  authenticated  and
delivered  only in  denominations  of $1,000  principal  amount and any integral
multiple  thereof and registered in such names as the  Depositary  shall direct.
Any certificated  Initial Security  delivered in exchange for an interest in the
Global Security shall,  except as otherwise provided by Section 2.3(d), bear the
Restricted Securities Legend set forth in Exhibit 1 hereto.

                  (c)  Subject  to  the  provisions  of  Section   2.4(b),   the
registered Holder of a Global Security may grant proxies and otherwise authorize
any Person,  including Agent Members and Persons that may hold interests through
Agent Members,  to take any action which a Holder is entitled to take under this
Indenture or the Securities.

                  (d) In the event of the  occurrence  of  either of the  events
specified in Section  2.4(a),  the Company will promptly  make  available to the
Trustee a reasonable  supply of  certificated  Securities in  definitive,  fully
registered form without interest coupons.


<PAGE>


                                       E-1


                                                        EXHIBIT I
                                                           to
                                              Rule 144A/REGULATION S APPENDIX


                             [FACE OF INITIAL NOTE]

                           [Global Securities Legend]

                  UNLESS  THIS   CERTIFICATE   IS  PRESENTED  BY  AN  AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION  ("DTC"),
TO THE COMPANY (AS DEFINED  BELOW) OR ITS AGENT FOR  REGISTRATION  OF  TRANSFER,
EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS  REGISTERED IN THE NAME OF
CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
DTC  (AND  ANY  PAYMENT  IS MADE TO CEDE & CO.  OR TO SUCH  OTHER  ENTITY  AS IS
REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR  OTHERWISE  BY OR TO ANY PERSON IS WRONGFUL  INASMUCH AS
THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

                  UNLESS  AND  UNTIL  IT IS  EXCHANGED  IN  WHOLE OR IN PART FOR
SECURITIES  IN  DEFINITIVE   REGISTERED   FORM,  THIS  CERTIFICATE  MAY  NOT  BE
TRANSFERRED  EXCEPT AS A WHOLE BY DTC TO A NOMINEE OF DTC OR BY A NOMINEE OF DTC
TO DTC OR ANOTHER  NOMINEE OF DTC OR BY DTC OR ANY SUCH  NOMINEE TO A  SUCCESSOR
DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.

                  THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY  ISSUED IN A
TRANSACTION  EXEMPT FROM REGISTRATION  UNDER THE UNITED STATES SECURITIES ACT OF
1933 (THE  "SECURITIES  ACT"),  AND THIS  SECURITY  MAY NOT BE OFFERED,  SOLD OR
OTHERWISE  TRANSFERRED  IN THE  ABSENCE OF SUCH  REGISTRATION  OR AN  APPLICABLE
EXEMPTION THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE
SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION  FROM THE  PROVISIONS OF
SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

                  THE  HOLDER OF THIS  SECURITY  AGREES  FOR THE  BENEFIT OF THE
COMPANY  THAT (A) THIS  SECURITY  MAY BE OFFERED,  RESOLD,  PLEDGED OR OTHERWISE
TRANSFERRED  ONLY  (i) TO A PERSON  WHOM THE  SELLER  REASONABLY  BELIEVES  IS A
"QUALIFIED  INSTITUTIONAL  BUYER" (AS DEFINED IN RULE 144A UNDER THE  SECURITIES
ACT) IN A TRANSACTION MEETING THE


<PAGE>


                                       E-2


REQUIREMENTS  OF RULE 144A,  (ii) IN AN OFFSHORE  TRANSACTION IN ACCORDANCE WITH
RULE  904  UNDER  THE  SECURITIES  ACT,  (iii)  PURSUANT  TO AN  EXEMPTION  FROM
REGISTRATION  UNDER THE  SECURITIES  ACT  PROVIDED  BY RULE 144  THEREUNDER  (IF
AVAILABLE),  (iv) TO THE ISSUER,  OR (v) PURSUANT TO AN  EFFECTIVE  REGISTRATION
STATEMENT  UNDER  THE  SECURITIES  ACT,  IN EACH OF  CASES  (i)  THROUGH  (v) IN
ACCORDANCE  WITH ANY  APPLICABLE  SECURITIES  LAWS OF ANY  STATE  OF THE  UNITED
STATES,  AND (B) THE HOLDER  WILL,  AND EACH  SUBSEQUENT  HOLDER IS REQUIRED TO,
NOTIFY  ANY  PURCHASER  OF  THIS  SECURITY  FROM IT OF THE  RESALE  RESTRICTIONS
REFERRED TO IN (A) ABOVE.

                  IN CONNECTION  WITH ANY  TRANSFER,  THE HOLDER WILL DELIVER TO
THE REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH
TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH
THE FOREGOING RESTRICTIONS.




<PAGE>


                                       E-3


                           WINSTAR EQUIPMENT II CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

                                                           CUSIP
No. QIB-                                                        $___________



                  WINSTAR  EQUIPMENT  II  CORP.,  a  Delaware  corporation  (the
"Company",  which term  includes any successor  under the Indenture  hereinafter
referred  to),  for  value  received,  promises  to pay to  __________  , or its
registered  assigns,  the  principal sum of  ____________  ($_____) on March 15,
2004.

                  Interest Payment Dates:  March 15 and September 15, commencing
September 15, 1997.

                  Regular Record Dates:  March 1 and September 1.

                  Reference  is hereby  made to the further  provisions  of this
Note set forth on the reverse  hereof,  which further  provisions  shall for all
purposes have the same effect as if set forth at this place.



<PAGE>


                                       E-4


         IN WITNESS  WHEREOF,  the  Company  has  caused  this Note to be signed
manually or by facsimile by its duly authorized officer.

                                       WINSTAR EQUIPMENT II CORP.


                                       By:
                                          --------------------------------
                                         Name:
                                         Title:


                (Form of Trustee's Certificate of Authentication)

               This is one of the 12 1/2%  Guaranteed  Senior  Secured Notes Due
2004 described in the within-mentioned Indenture.


Date: _______________ , 1997           UNITED STATES TRUST COMPANY
                                       OF NEW YORK, as Trustee


                                       By:
                                          ---------------------------------
                                                  Authorized Signatory




<PAGE>


                                       E-5

                             [REVERSE SIDE OF NOTE]

                           WINSTAR EQUIPMENT II CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

1.  Principal and Interest.

                  The Company  will pay the  principal of this Note on March 15,
2004.

                  The Company  promises to pay interest on the principal  amount
of this Note on each Interest  Payment Date, as set forth below, at the rate per
annum shown above.

                  Interest  will be  payable  semiannually  (to the  holders  of
record of the  Notes at the close of  business  on the March 1 and  September  1
immediately  preceding  the relevant  Interest  Payment  Date) on each  Interest
Payment Date, commencing September 15, 1997.

                  Interest  on the  Notes  will  accrue  from  the  most  recent
Interest Payment Date; provided,  however, that, if there is no existing default
in the  payment of  interest  and this Note is  authenticated  between a Regular
Record  Date  referred to on the face  hereof and the next  succeeding  Interest
Payment Date,  interest shall accrue from such Interest  Payment Date.  Interest
will be  computed  on the  basis of a  360-day  year of  twelve  30-day  months.
Notwithstanding  the above,  (i) if a  Registration  Default  (as defined in the
Registration  Rights Agreement) occurs,  additional interest will accrue on this
Note at a rate of 0.50% per annum from and  including the date on which any such
Registration Default shall occur to but excluding the earlier of (x) the date on
which all  Registration  Defaults  have been cured and (y) the date on which all
Notes become freely transferable by Holders other than Affiliates of the Company
without further registration under the Securities Act.

                  The  Company  shall pay  interest  on  overdue  principal  and
premium, if any, and (to the extent lawful) interest on overdue  installments of
interest.

2.  Method of Payment.

         The Company will pay principal as provided  above and interest  (except
defaulted  interest) on the principal  amount of the Notes as provided  above on
each March 15 and  September 15 to the persons who are Holders (as  reflected in
the  Security  Register at the close of business on the March 1 and  September 1
immediately preceding the relevant Interest Payment Date), in each case, even if
the Note is cancelled on  registration  of transfer or  registration of exchange
after such record date; provided,  however, that, with respect to the payment of
principal,  the Company will not make payment to the Holder  unless this Note is
surrendered to a Paying Agent.


<PAGE>


                                       E-6



         The  Company  will pay  principal  and  interest in money of the United
States  that at the time of  payment is legal  tender for  payment of public and
private  debts.  Payments in respect of the Notes  represented  by a global Note
(including  principal,  premium and  interest)  will be made by wire transfer of
immediately  available funds to the accounts  specified by The Depository  Trust
Company.  The Company will make all payments in respect of a  certificated  Note
(including principal, premium and interest) by mailing a check to the registered
address  of  each  Holder  thereof;  provided,   however,  that  payments  on  a
certificated  Note  will  be  made by wire  transfer  to a U.S.  dollar  account
maintained  by the payee with a bank in the United  States if such Holder elects
payment by wire transfer by giving  written  notice to the Trustee or the Paying
Agent to such effect  designating such account no later than 30 days immediately
preceding  the  relevant due date for payment (or such other date as the trustee
may accept in its discretion).

3.  Paying Agent and Registrar.

                  Initially,  United  States  Trust  Company  of New  York  (the
"Trustee") will act as  authenticating  agent,  Paying Agent and Registrar.  The
Company may change any authenticating  agent,  Paying Agent or Registrar without
notice.  The Company,  any Subsidiary or any Affiliate of any of them may act as
Paying Agent, Registrar or co-Registrar.

4.  Indenture.

                  The Company  issued the Notes under an  Indenture  dated as of
August  1,1997 (the  "Indenture"),  among the Company,  WinStar  Communications,
Inc., as guarantor (the  "Guarantor") and the Trustee.  Capitalized terms herein
are used as defined in the Indenture  unless otherwise  indicated.  The terms of
the Notes  include  those  stated in the  Indenture  and those  made part of the
Indenture by reference to the Trust  Indenture Act. The Notes are subject to all
such terms,  and Holders are referred to the Indenture  and the Trust  Indenture
Act for a statement of all such terms.  To the extent  permitted  by  applicable
law,  in the event of any  inconsistency  between the terms of this Note and the
terms of the Indenture, the terms of the Indenture shall control.

                  The Notes are secured senior indebtedness of the Company.  The
Indenture  limits  the  original  aggregate  principal  amount  of the  Notes to
$50,000,000 (subject to Section 2.07 of the Indenture).

5.  Optional Redemption.

                  The Notes  will not be  redeemable  prior to March  15,  2002.
Thereafter,  the Notes will be redeemable,  at the Company's option, in whole at
any time or in part  from time to time on or after  March 15,  2002 and prior to
maturity,  upon not less than 30 nor more than 60 days' prior  notice  mailed by
first-class mail to each Holders' last address as it appears in


<PAGE>


                                       E-7


the Security  Register,  at the  following  Redemption  Prices  (expressed  as a
percentage  of the  principal  amount of the  Notes,  plus  accrued  and  unpaid
interest, if any, on such amount to the Redemption Date (subject to the right of
Holders of record on the relevant Regular Record Date that is on or prior to the
Redemption Date to receive interest due on the relevant Interest Payment Date if
redeemed  during the  12-month  period  commencing  on March 15 of the years set
forth below:

                      Year                             Redemption Price
                     ------                            -----------------
                      2002                                  106.250%
                      2003 and thereafter                   103.125%

6.  Mandatory Redemption.

                  In the event that by August 8,  1999,  the  Company  shall not
have applied at least $50.0 million to fund the Acquisition  Costs of Designated
Equipment  pursuant to the Indenture  ($50.0  million less the amount so applied
being herein  called the "Unused  Equipment  Amount"),  the Company shall redeem
Notes in an aggregate principal amount equal to the Unused Equipment Amount at a
redemption  price of 112.5% of such  principal  amount,  plus accrued and unpaid
interest  thereon to the  Redemption  Date  (subject  to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to  receive  interest  due on the  relevant  Interest  Payment  Date).  The
mandatory redemption shall occur no later than August 23, 1999.

                  Selection of the Notes for mandatory  redemption  will be made
on a pro rata  basis;  provided,  however,  that no Note of $1,000 in  principal
amount or less shall be  redeemed  in part.  If any Notes are to be  redeemed in
part  only,  a new Note in  principal  amount  equal to the  unredeemed  portion
thereof will be issued in the name of the Holder  thereof upon  cancellation  of
the original Note.

7.  Notice of Redemption.

                  Notice  of any  optional  redemption  will  be  mailed  by the
Company at least 30 days but not more than 60 days before a Redemption Date, and
notice of a  mandatory  redemption  will be mailed  by the  Company  at least 10
Business  Days but not more than 15 Business  Days before a Redemption  Date, in
each case,  to each  Holder of Notes to be  redeemed  at his last  address as it
appears in the Security Register.  Notes in original  denominations  larger than
$1,000  may be  redeemed  in part;  provided,  however,  that Notes will only be
issued  in  denominations  of $1,000  principal  amount  or  integral  multiples
thereof.  On and after the Redemption  Date,  interest ceases to accrue on Notes
(or portions of Notes) called for redemption, unless the Company defaults in the
payment of the Redemption Price.

8.  Repurchase upon Change in Control.


<PAGE>


                                       E-8



         Upon the occurrence of a Change of Control,  each Holder shall have the
right to require the  repurchase of its Notes by the Company in cash pursuant to
the offer  described in the  Indenture at a purchase  price equal to 101% of the
principal amount of such Notes on such date of purchase, plus accrued and unpaid
interest, if any, on such amount to the date of purchase (the "Change of Control
Payment").

         A notice of such Change of Control will be mailed  within 30 days after
any Change of Control occurs to each Holder at his last address as it appears in
the Security Register. Notes in original denominations larger than $1,000 may be
sold to the Company in part; provided,  however,  that Notes will only be issued
in denominations  of $1,000  principal amount at maturity or integral  multiples
thereof.  On and after the Change of Control  Payment Date,  interest  ceases to
accrue on Notes or portions of Notes  surrendered  for  purchase by the Company,
unless the Company defaults in the payment of the Change of Control Payment.

9.  Guarantee.

         The  Notes  are  guaranteed  on a  senior  unsubordinated  basis by the
Guarantor to the extent provided in the Indenture.

10.  Collateral and Security Documents.

         To secure the due and punctual  payment of the principal of, premium if
any,  and  interest  on the Notes and all other  amounts  payable by the Company
under the Indenture and the Notes when and as the same shall be due and payable,
whether at  maturity,  by  acceleration  or  otherwise,  the Grantor has granted
security  interests in the Collateral to the Collateral Agent for the benefit of
the Holders of Notes pursuant to the Security Documents.

11.  Denominations; Transfer; Exchange.

                  The  Notes  are  in   registered   form  without   coupons  in
denominations of $1,000 of principal amount and integral  multiples  thereof.  A
Holder may  register the  transfer or exchange of Notes in  accordance  with the
Indenture.  The Registrar may require a Holder,  among other things,  to furnish
appropriate  endorsements  and transfer  documents and to pay any taxes and fees
required by law or permitted by the  Indenture.  The Registrar need not register
the transfer or exchange of any Notes selected for redemption. Also, it need not
register  the transfer or exchange of any Notes for a period of 15 days before a
selection of Notes to be redeemed is made.

12.  Persons Deemed Owners.

         A Holder shall be treated as the owner of a Note for all purposes.



<PAGE>


                                       E-9


13.  Unclaimed Money.

         If money for the  payment of  principal,  premium,  if any, or interest
remains  unclaimed for two years,  the Trustee and the Paying Agent will pay the
money back to the Company at its request.  After that,  Holders  entitled to the
money must look to the Company for payment,  unless an applicable law designates
another  Person,  and all  liability  of the Trustee and such Paying  Agent with
respect to such money shall cease.

14.  Discharge Prior to Redemption or Maturity.

         Subject to certain  conditions,  the Company at any time may  terminate
some or all of its obligations  under the Notes,  the Indenture and the Security
Documents,  and the Guarantor may terminate its obligations  under the Equipment
Note  Guarantee,  if the  Company  deposits  with  the  Trustee  money  or  U.S.
Government  Obligations  for payment of  principal  and interest on the Notes to
redemption or maturity, as the case may be.

15.  Amendment; Supplement; Waiver.

                  Subject to certain exceptions,  the Indenture or the Notes may
be  amended  or  supplemented  with the  consent  of the  Holders  of at least a
majority in  principal  amount of the Notes then  outstanding,  and any existing
default or  compliance  with any provision may be waived with the consent of the
Holders  of  at  least  a  majority  in  principal  amount  of  the  Notes  then
outstanding. Without notice to or the consent of any Holder, the parties thereto
may amend or supplement the Indenture or the Notes to, among other things,  cure
any ambiguity,  defect or inconsistency and make any change that, in the opinion
of the Board of Directors  of the Company,  does not  materially  and  adversely
affect the rights of any Holder.

16.  Restrictive Covenants.

                  The Indenture  imposes  certain  limitations on the ability of
the  Guarantor and its  Restricted  Subsidiaries,  among other things,  to incur
additional  indebtedness;  create liens; engage in sale-leaseback  transactions;
pay  dividends or make  distributions  in respect of their capital  stock;  make
investments or make certain other  restricted  payments;  sell assets;  issue or
sell stock of Restricted Subsidiaries; enter into transactions with stockholders
or affiliates;  or, with respect to the Company, to incur any indebtedness other
than the  Notes;  engage  in any  other  business  activities;  apply  the gross
proceeds  from  the sale of the  Notes to uses  other  than the  acquisition  of
Designated  Equipment;  fail to take  action to vest a security  interest in the
Designated  Equipment  in the  Trustee;  fail to file proper  UCC-1s and UCC-3s;
consolidate,  merge or sell all or  substantially  all of its assets.  Within 90
days after the end of the last fiscal  quarter of each year,  the  Company  must
report to the Trustee on compliance with such limitations.



<PAGE>


                                      E-10


17.  Successor Persons.

                  Generally, when a successor person or other entity assumes all
the  obligations  of its  predecessor  under the Notes  and the  Indenture,  the
predecessor person will be released from those obligations.

18.  Defaults and Remedies.

                  The following events constitute  "Events of Default" under the
Indenture:  (a) default in the payment of principal of (or premium,  if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise;  (b)  default in the  payment of  interest  on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company or WCI defaults in the performance of or breaches any other covenant
or  agreement  of the Company or WCI in the  Indenture or under the Notes or the
Security  Documents  and such  default  or breach  continues  for a period of 30
consecutive  days after  written  notice by the Trustee or the Holders of 25% or
more in aggregate  principal  amount of the Notes; (d) there occurs with respect
to any issue or  issues of  Indebtedness  of WCI or any  Significant  Subsidiary
having an outstanding  principal  amount of $25,000,000 or more in the aggregate
for all such issues of all such Persons, whether such Indebtedness now exists or
shall  hereafter be created,  (i) an event of default that has caused the holder
thereof to declare such  Indebtedness  to be due and payable prior to its Stated
Maturity  and  such  Indebtedness  has  not  been  discharged  in  full  or such
acceleration  has  not  been  rescinded  or  annulled  within  30  days  of such
acceleration  and/or (ii) the  failure to make a principal  payment at the final
(but not any interim) fixed  maturity and such defaulted  payment shall not have
been made,  waived or extended within 30 days of such payment  default;  (e) any
final  judgment or order (not covered by insurance)  for the payment of money in
excess of  $25,000,000  in the aggregate for all such final  judgments or orders
against all such Persons (treating any deductibles,  self-insurance or retention
as not so covered) shall be rendered  against WCI or any Significant  Subsidiary
and  shall  not be paid or  discharged,  and  there  shall be any  period  of 60
consecutive  days following entry of the final judgment or order that causes the
aggregate amount for all such final judgments or orders outstanding and not paid
or discharged against all such Persons to exceed $25,000,000 during which a stay
of enforcement of such final judgment or order, by reason of a pending appeal or
otherwise,  shall  not be in  effect;  (f) a court  having  jurisdiction  in the
premises  enters a decree  or order  for (i)  relief  in  respect  of WCI or any
Significant  Subsidiary in an involuntary case under any applicable  bankruptcy,
insolvency or other similar law now or hereafter in effect,  (ii) appointment of
a receiver,  liquidator,  assignee,  custodian, trustee, sequestrator or similar
official of WCI or any Significant Subsidiary or for all or substantially all of
the  property  and  assets  of WCI or any  Significant  Subsidiary  or (iii) the
winding up or  liquidation of the affairs of WCI or any  Significant  Subsidiary
and, in each case,  such decree or order shall remain unstayed and in effect for
a period of 60  consecutive  days;  (g) WCI or any  Significant  Subsidiary  (i)
commences a voluntary case under any applicable bankruptcy, insolvency or


<PAGE>


                                      E-11


other  similar law now or  hereafter  in effect,  or consents to the entry of an
order for relief in an involuntary  case under any such law, (i) consents to the
appointment  of  or  taking  possession  by a  receiver,  liquidator,  assignee,
custodian,  trustee,  sequestrator or similar official of WCI or any Significant
Subsidiary or for all or substantially  all of the property and assets of WCI or
any  Significant  Subsidiary  or (iii)  effects any general  assignment  for the
benefit of creditors; (h) any of the provisions of the Indenture relating to the
Security Documents or the Security Documents shall cease to be in full force and
effect or shall cease to give the secured parties the Liens,  rights,  power and
privileges  purported to be created thereby; or (i) the Equipment Note Guarantee
shall cease to be in full force and effect  (other than in  accordance  with its
terms) or the  Guarantor  shall  deny or  disaffirm  its  obligations  under the
Equipment Note Guarantee.

         If an Event of Default  (other  than an Event of Default  specified  in
clause (f) or (g) above that occurs  with  respect to the Company or WCI) occurs
and is continuing  under the  Indenture,  the Trustee or the Holders of at least
25% in aggregate  principal amount of the Notes,  then  outstanding,  by written
notice  to the  Company  (and to the  Trustee  if such  notice  is  given by the
Holders), may, and the Trustee at the request of such Holders shall, declare the
principal of, premium, if any, and accrued interest,  if any, on the Notes to be
immediately due and payable.  If a bankruptcy or insolvency default with respect
to the  Company  or any  Restricted  Subsidiary  occurs and is  continuing,  the
principal amount of the Notes automatically becomes due and payable. Holders may
not enforce the Indenture or the Notes except as provided in the Indenture.  The
Trustee  may  require  indemnity  satisfactory  to it  before  it  enforces  the
Indenture or the Notes.  Subject to certain  limitations,  Holders of at least a
majority  in  principal  amount of the Notes  then  outstanding  may  direct the
Trustee in its exercise of any trust or power.

19.  Trustee Dealings with Company.

                  The Trustee  under the  Indenture,  in its  individual  or any
other capacity, may make loans to, accept deposits from and perform services for
the Company or its  Affiliates  and may  otherwise  deal with the Company or its
Affiliates as if it were not the Trustee.

20.  No Recourse Against Others.

                  No incorporator,  stockholder,  officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such  obligations or their creation  provided,  however,  that the foregoing
shall not affect the Guarantor's  obligations with respect to the Equipment Note
Guarantee.  Each  Holder  by  accepting  a Note  waives  and  releases  all such
liability.  Such  waiver  and  release  are  part of the  consideration  for the
issuance of the Notes.



<PAGE>


                                      E-12


21.  Authentication.

                  This  Note   shall  not  be  valid   until  the   Trustee   or
authenticating  agent signs the certificate of  authentication on the other side
of this Note.

22.  Holders' Compliance with Registration Rights Agreement.

                  Each Holder of a Note, by acceptance hereof,  acknowledges and
agrees  to the  provisions  of the  Registration  Rights  Agreement,  including,
without   limitation,   the  obligations  of  the  Holders  with  respect  to  a
registration  and the  indemnification  of the  Company to the  extent  provided
therein.

23.  Abbreviations.

         Customary  abbreviations  may be used in the  name  of a  Holder  or an
assignee,  such as:  TEN COM (= tenants  in  common),  TEN ENT (= tenants by the
entireties),  JT TEN (= joint  tenants  with  right of  survivorship  and not as
tenants in common),  CUST (=  Custodian)  and U/G/M/A (= Uniform Gifts to Minors
Act).

24.  Governing Law.

         The  Indenture and the Notes shall be governed by the laws of the State
of New York,  excluding (to the extent  permissible by law) any rule of law that
would cause the application of the laws of any jurisdiction other than the State
of New York.

         The Company will furnish to any Holder upon written request and without
charge a copy of the  Indenture.  Requests  may be made to WinStar  Equipment II
Corp., 1577 Spring Hill Road, Sixth Floor,  Vienna,  Virginia 22182,  Attention:
General Counsel.





<PAGE>


                                      E-13


                                 ASSIGNMENT FORM


I or we assign and transfer this Note to:



Please insert social security or other identifying number of assignee


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

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


Print or type name,  address and zip code of assignee  and  irrevocably  appoint
____________________,  as  agent,  to  transfer  this  Note on the  books of the
Company.

The agent may substitute another to act for him.

Dated  ____________________            Signed ____________________________




___________________________________________________________________________
      (Sign exactly as name appears on the other side of this Note)


Signature Guarantee ______________________________(1)

In  connection  with any  transfer of any of the  Securities  evidenced  by this
certificate  occurring prior to the expiration of the period referred to in Rule
144(k) under the Securities Act after the later of the date of original issuance
of such Securities and the last date, if any, on which
- --------
1. The Holder's  signature  must be  guaranteed by a member firm of a registered
national  securities  exchange  or of the  National  Association  of  Securities
Dealers,  Inc.,  a  commercial  bank  or  trust  company  having  an  office  or
correspondent  in the United States or an "eligible  guarantor  institution"  as
defined by Rule 17Ad-15 under the Exchange Act.


<PAGE>


                                      E-14


such Securities  were owned by the Company or any Affiliate of the Company,  the
undersigned  confirms that such  Securities are being  transferred in accordance
with its terms:

CHECK ONE BOX BELOW

     (1)  |_| to the Company; or

     (2)  |_|  pursuant  to  an  effective   registration  statement  under  the
          Securities Act of 1933; or

     (3)  |_| inside the United States to a "qualified  institutional buyer" (as
          defined in Rule 144A under the  Securities Act of 1933) that purchases
          for its own account or for the  account of a  qualified  institutional
          buyer to whom  notice is given  that such  transfer  is being  made in
          reliance on Rule 144A, in each case pursuant to and in compliance with
          Rule 144A under the Securities Act of 1933; or

     (4)  |_| outside the United  States in an offshore  transaction  within the
          meaning of Regulation S under the  Securities  Act in compliance  with
          Rule 904 under the Securities Act of 1933; or

     (5)  |_| pursuant to another available exemption from registration provided
          by Rule 144 under the Securities Act of 1933.

         Unless one of the boxes is checked, the Trustee will refuse to register
         any of the Securities  evidenced by this certificate in the name of any
         person other than the registered  holder  thereof;  provided,  however,
         that if box (4) or (5) is checked,  the Trustee may  require,  prior to
         registering any such transfer of the  Securities,  such legal opinions,
         certifications  and other  information  as the Company  has  reasonably
         requested  to confirm that such  transfer is being made  pursuant to an
         exemption


<PAGE>


                                      E-15


         from, or in a transaction not subject to, the registration requirements
         of the Securities Act of 1933,  such as the exemption  provided by Rule
         144 under such Act.




                                                     ------------------------
                                                       Signature

Signature Guarantee:

- ---------------------                           --------------------------
Signature must be guaranteed                            Signature

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


              TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED.

                  The undersigned  represents and warrants that it is purchasing
this  Security  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
Securities  Act of  1933,  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 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: ________________                        ______________________________
                                                NOTICE: To be executed by
                                                        an executive officer




<PAGE>


                                      E-16


                      [TO BE ATTACHED TO GLOBAL SECURITIES]

              SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

                  The following  increases or decreases in this Global  Security
have been made:
<TABLE>
<CAPTION>

<S>                              <C>                         <C>                       <C>                           <C>   
                          Amount of decrease in     Amount of increase in     Principal amount of this      Signature of authorized
Date of                   Principal  Amount of this Principal Amount of this  Global Security following      officer of Trustee or
Exchange                  Global Security           Global Security           such decrease or increase)      Securities Custodian

</TABLE>





<PAGE>


                                      E-17

                       OPTION OF HOLDER TO ELECT PURCHASE


     If you wish to have this Note purchased by the Company  pursuant to Section
4.11 or Section 4.12 of the Indenture, check the Box: |_|

     If you  wish to  have a  portion  of this  Note  purchased  by the  Company
pursuant to Section 4.11 or Section 4.12 of the Indenture,  state the amount (in
principal amount):
$_______________

Date: _________________

Your Signature: _____________________________________________________________
            (Sign exactly as your name appears on the other side of this Note)

Signature Guarantee: __________________________(2)

- --------
2. The Holder's  signature  must be  guaranteed by a member firm of a registered
national  securities  exchange  or of the  National  Association  of  Securities
Dealers,  Inc.,  a  commercial  bank  or  trust  company  having  an  office  or
correspondent  in the United States or an "eligible  guarantor  institution"  as
defined by Rule 17Ad-15 under the Exchange Act.


<PAGE>



                                                               EXECUTION COPY


                                   $50,000,000

                           WINSTAR EQUIPMENT II CORP.

          $50,000,000 12 1/2% Guaranteed Senior Secured Notes Due 2004


                          REGISTRATION RIGHTS AGREEMENT


                                                               August 8, 1997

Credit Suisse First Boston Corporation
BT Securities Corporation
c/o Credit Suisse First Boston Corporation
         Eleven Madison Avenue
         New York, New York  10010

Ladies and Gentlemen:

         WinStar Equipment II Corp., a Delaware corporation (the "Issuer"),  has
agreed  to issue and sell to  Credit  Suisse  First  Boston  Corporation  and BT
Securities Corporation (the "Initial Purchasers"), upon the terms set forth in a
purchase agreement of even date herewith (the "Purchase  Agreement"),$50,000,000
aggregate  principal  amount of the Issuer's 12 1/2%  Guaranteed  Senior Secured
Notes Due 2004 (the"Notes").  The Notes will be unconditionally  guaranteed on a
senior  basis (the  "Guarantee")  by WinStar  Communications,  Inc.,  a Delaware
corporation  (the  "Guarantor").  The  Notes  will  be  issued  pursuant  to  an
Indenture,  dated as of August 1, 1997 (the "Indenture"),  among the Issuer, the
Guarantor  and United States Trust  Company of New York (the  "Trustee").  As an
inducement to the Initial  Purchasers,  the Issuer and the Guarantor  agree with
the Initial Purchasers,  for the benefit of the holders of the Notes (including,
without limitation, the Initial Purchasers), the Exchange Securities (as defined
below) and the Private Exchange Securities (as defined below)  (collectively the
"Holders"), as follows:

         1. Registered  Exchange Offer.  The Issuer and the Guarantor  shall, at
the Guarantor's cost,  prepare and, not later than 45 days after (or if the 45th
day is not a  business  day,  the first  business  day  thereafter)  the date of
original  issue of the Notes (the "Issue  Date"),  file with the  Securities and
Exchange  Commission (the "Commission") a registration  statement (the "Exchange
Offer  Registration  Statement") on an appropriate form under the Securities Act
of 1933, as amended (the  "Securities  Act"),  with respect to a proposed  offer
(the  "Registered  Exchange  Offer") to the  Holders  of the Notes,  who are not
prohibited by any law or policy of the Commission from participating in such a


<PAGE>


                                                                         2

Registered Exchange Offer, to issue and deliver to such Holders, in exchange for
their Notes, a like aggregate  principal amount of debt securities of the Issuer
(the  "Exchange  Securities")  issued under the  Indenture  and identical in all
material respects to the Notes (except for the transfer restrictions relating to
the Notes),  that would be registered under the Securities Act. The Issuer shall
use its best  efforts to cause such  Exchange  Offer  Registration  Statement to
become  effective  under the Securities Act within 150 days (or if the 150th day
is not a business day, the first business day  thereafter)  after the Issue Date
of the Notes and shall keep the Exchange Offer Registration  Statement effective
for not less than 30 days (or longer,  if required by applicable  law) after the
date notice of the  Registered  Exchange  Offers is mailed to the Holders  (such
period being called the "Exchange Offer Registration Period").

         If the Issuer and the Guarantor  effect the Registered  Exchange Offer,
the Issuer  will be  entitled to close such  Registered  Exchange  Offer 30 days
after the  commencement  thereof  provided  that the Issuer has accepted all the
Notes theretofore validly tendered in
accordance with the terms of the Registered Exchange Offer.

         Following the  declaration of the  effectiveness  of the Exchange Offer
Registration Statement, the Issuer and the Guarantor shall promptly commence the
Registered  Exchange Offer,  it being the objective of such Registered  Exchange
Offer to enable  each Holder of the Notes  electing  to exchange  such Notes for
Exchange Securities (assuming that such Holder is not an affiliate of the Issuer
or the Guarantor within the meaning of the Securities Act, acquires the Exchange
Securities  in  the  ordinary  course  of  such  Holder's  business  and  has no
arrangements  with any person to participate in the distribution of the Exchange
Securities  and is not  prohibited by any law or policy of the  Commission  from
participating  in  the  Registered  Exchange  Offers)  to  trade  such  Exchange
Securities  from and after their receipt without any limitations or restrictions
under the Securities Act and without material  restrictions under the securities
laws of the several states of the United States.

         The Issuer and the  Guarantor  acknowledge  that,  pursuant  to current
interpretations by the Commission's staff of Section 5 of the Securities Act, in
the absence of an  applicable  exemption  therefrom,  (i) each Holder which is a
broker-dealer  electing to  exchange  Notes,  acquired  for its own account as a
result of market making  activities or other  trading  activities,  for Exchange
Securities  (an  "Exchanging  Dealer"),  is  required  to  deliver a  prospectus
containing the  information set forth in Annex A hereto on the cover, in Annex B
hereto in the  "Exchange  Offer  Procedures"  section  and the  "Purpose  of the
Exchange  Offer"  section,  and in Annex C hereto in the "Plan of  Distribution"
section  of such  prospectus  in  connection  with a sale of any  such  Exchange
Securities  received by such Exchanging Dealer pursuant to a Registered Exchange
Offer and (ii) an Initial  Purchaser  that  elects to sell  Exchange  Securities
acquired in exchange for Notes  constituting  any portion of an unsold allotment
is required to deliver a prospectus


<PAGE>


                                                                         3

containing the information  required by Items 507 or 508 of Regulation S-K under
the Securities Act, as applicable, in connection with such sale.

         The Issuer and the  Guarantor  shall use their best efforts to keep the
Exchange Offer Registration  Statement effective and to amend and supplement the
prospectus  contained therein, in order to permit such prospectus to be lawfully
delivered by all persons subject to the prospectus delivery  requirements of the
Securities  Act for such  period of time as such  persons  must comply with such
requirements in order to resell the Exchange Securities; provided, however, that
(i) in the case where such  prospectus  and any amendment or supplement  thereto
must be delivered by an Exchanging Dealer or an Initial  Purchaser,  such period
shall be the lesser of 180 days and the date on which all Exchanging Dealers and
the Initial  Purchasers  have sold all Exchange  Securities held by them (unless
such period is extended  pursuant to Section 3(j) below) and (ii) the Issuer and
the  Guarantor  shall  make such  prospectus  and any  amendment  or  supplement
thereto, available to any broker-dealer for use in connection with any resale of
any  Exchange  Securities  for  a  period  not  less  than  90  days  after  the
consummation of the Registered Exchange Offer.

         If, upon  consummation of the Registered  Exchange  Offer,  any Initial
Purchaser  holds Notes acquired by it as part of its initial  distribution,  the
Issuer,  simultaneously with the delivery of the Exchange Securities pursuant to
the Registered Exchange Offer, shall issue and deliver to such Initial Purchaser
upon the written  request of such Initial  Purchaser,  in exchange (the "Private
Exchange") for the Notes held by such Initial Purchaser, a like principal amount
of debt securities of the Issuer issued under the Indenture and identical in all
material respects (including the existence of restrictions on transfer under the
Securities  Act and the  securities  laws of the  several  states of the  United
States)  to the Notes  (the  "Private  Exchange  Securities").  The  Notes,  the
Exchange  Securities and the Private Exchange Securities are herein collectively
called the "Securities".

     In  connection  with the  Registered  Exchange  Offer,  the  Issuer and the
Guarantor shall:

         (a) mail to each Holder a copy of the  prospectus  forming  part of the
Exchange Offer  Registration  Statement,  together with an appropriate letter of
transmittal and related documents;

         (b) keep the  Registered  Exchange Offer open for not less than 30 days
(or  longer,  if required by  applicable  law) after the date notice  thereof is
mailed to the Holders;

         (c) utilize the services of a depositary  for the  Registered  Exchange
Offer with an address in the Borough of Manhattan,  The City of New York,  which
may be the Trustee


<PAGE>


                                                                         4

or an affiliate of the Trustee;

         (d) permit Holders to withdraw  tendered Notes at any time prior to the
close  of  business,  New  York  time,  on the last  business  day on which  the
Registered Exchange Offer shall remain open; and

         (e)  otherwise comply with all applicable laws.

         As soon as practicable after the close of the Registered Exchange Offer
or Private Exchange, as the case may be, the Issuer shall:

         (x)  accept  for  exchange  all  the  Notes  validly  tendered  and not
withdrawn pursuant to the Registered Exchange Offer or the Private Exchange,  as
the  case  may be  (such  acceptance  constituting  the  "consummation"  of such
Registered Exchange Offer notwithstanding the fact that not all of the Notes may
have been so tendered);

     (y) deliver to the Trustee for  cancellation  all the Notes so accepted for
exchange; and

         (z) cause the  Trustee to  authenticate  and  deliver  promptly to each
Holder which validly  tendered Notes,  Exchange  Securities or Private  Exchange
Securities,  as the case may be, equal in principal  amount to the Notes of such
Holder so accepted for exchange.

         The Indenture will provide that the Exchange  Securities subject to the
Indenture  will not be subject to the  transfer  restrictions  set forth in such
Indenture.  The  Indenture  will  also  provide  that  all the  Notes,  Exchange
Securities and Private Exchange  Securities  subject to such Indenture will vote
and  consent  together  on all  matters as one class and that none of the Notes,
Exchange  Securities or Private  Exchange  Securities  subject to such Indenture
will have the right to vote or consent as a separate  class from one  another on
any matter.

         Interest on each Exchange  Security or Private Exchange Security issued
pursuant to a Registered Exchange Offer or Private Exchange will accrue from the
last interest payment date on which interest was paid on the Note surrendered in
exchange  therefor or, if no interest has been paid on such Note,  from the date
of original issue of such Note.

         Each Holder  tendering  Notes in a Registered  Exchange  Offer shall be
required to represent to the Issuer that at the time of the consummation of such
Registered  Exchange Offer (i) any Exchange  Securities  received by such Holder
will be acquired in the ordinary course of business,  (ii) such Holder will have
no  arrangements  or  understanding  with  any  person  to  participate  in  the
distribution of the Notes or the Exchange  Securities  within the meaning of the
Securities Act, (iii) such Holder is not an "affiliate," as defined in Rule


<PAGE>


                                                                         5

405  of the  Securities  Act,  of the  Issuer  or the  Guarantor  or if it is an
affiliate, such Holder will comply with the registration and prospectus delivery
requirements of the Securities Act to the extent applicable, (iv) if such Holder
is not a broker-dealer, that it is not engaged in, and does not intend to engage
in, the  distribution  of the  Exchange  Securities  and (v) if such Holder is a
broker-dealer,  that it will receive Exchange  Securities for its own account in
exchange for Notes that were acquired as a result of market-making activities or
other trading  activities  and that it will be required to  acknowledge  that it
will  deliver a  prospectus  in  connection  with any  resale  of such  Exchange
Securities.

         Notwithstanding  any  other  provisions  hereof,  the  Issuer  and  the
Guarantor will ensure that (i) the Exchange Offer Registration Statement and any
amendment  thereto and any prospectus  forming a part thereof and any supplement
thereto complies in all material  respects with the Securities Act and the rules
and regulations  thereunder,  (ii) the Exchange Offer Registration Statement and
any  amendment  thereto does not, when it becomes  effective,  contain an untrue
statement  of a material  fact or omit to state a material  fact  required to be
stated  therein or necessary to make the  statements  therein not misleading and
(iii) any prospectus forming part of the Exchange Offer Registration  Statement,
and any supplement to such prospectus, does not include an untrue statement of a
material fact or omit to state a material fact required to be stated  therein or
necessary  in  order  to  make  the  statements  therein,  in the  light  of the
circumstances under which they were made, not misleading.

         2.  Shelf  Registration.  If,  (i)  because  of any change in law or in
applicable  interpretations  thereof by the staff of the Commission,  the Issuer
and the Guarantor are not permitted to effect the Registered  Exchange Offer, as
contemplated  by Section 1 hereof,  (ii) the  Registered  Exchange  Offer is not
consummated  within 180 days of the Issue Date,  (iii) any Initial  Purchaser so
requests  with  respect to the Notes (or the Private  Exchange  Securities)  not
eligible to be exchanged for Exchange  Securities in a Registered Exchange Offer
and held by it following  consummation of the Registered Exchange Offers or (iv)
any  Holder of Notes  (other  than an  Exchanging  Dealer)  is not  eligible  to
participate  in the  Registered  Exchange  Offer or,  in the case of any  Holder
(other than an Exchanging  Dealer) that participates in the Registered  Exchange
Offer, such Holder does not receive freely tradeable Exchange  Securities on the
date of the  exchange,  the Issuer and the  Guarantor  shall take the  following
actions:

         (a) The Issuer and the Guarantor  shall,  at their cost, as promptly as
practicable  (but in no event more than 30 days after so required  or  requested
pursuant to this Section 2) file with the Commission  and  thereafter  shall use
their best efforts to cause to be declared effective a registration statement or
statements (the "Shelf  Registration  Statement" and, together with the Exchange
Offer Registration Statement, a "Registration Statement") on an appropriate form
under  the  Securities  Act  relating  to the  offer  and  sale of the  Transfer
Restricted Securities (as defined in Section 6 hereof) by the Holders thereof


<PAGE>


                                                                         6

from time to time in accordance  with the methods of  distribution  set forth in
the  Shelf  Registration  Statement  and  Rule  415  under  the  Securities  Act
(hereinafter,  the  "Shelf  Registration");  provided,  however,  that no Holder
(other than an Initial  Purchaser) shall be entitled to have the Securities held
by it covered by such Shelf Registration  Statement unless such Holder agrees in
writing to be bound by all the provisions of this Agreement
applicable to such Holder.

         (b) The Issuer and the  Guarantor  shall use their best efforts to keep
the Shelf Registration  Statement  continuously effective in order to permit the
prospectus  included  therein to be  lawfully  delivered  by the  Holders of the
Securities,  for a period of two years (or for such  longer  period if  extended
pursuant  to Section  3(j)  below)  from the date of its  effectiveness  or such
shorter period that will terminate when all the Securities  covered by the Shelf
Registration  Statement (i) have been sold pursuant thereto or (ii) are eligible
for sale  under  Rule  144(k)  under the  Securities  Act.  The  Issuer  and the
Guarantor  shall be deemed not to have used their best efforts to keep the Shelf
Registration Statement effective during the requisite period if they voluntarily
take any  action  (other  than any  action  permitted  to be  taken  under  this
Agreement) that would result in Holders of Securities  covered thereby not being
able to offer and sell such Securities during that period, unless such action is
required by applicable law.

         (c)  Notwithstanding  any other  provisions  of this  Agreement  to the
contrary,  the  Issuer  and the  Guarantor  shall  cause the Shelf  Registration
Statement and the related prospectus and any amendment or supplement thereto, as
of the  effective  date  of  the  Shelf  Registration  Statement,  amendment  or
supplement,  (i)  to  comply  in  all  material  respects  with  the  applicable
requirements  of the  Securities  Act  and  the  rules  and  regulations  of the
Commission  and (ii) not to contain any untrue  statement of a material  fact or
omit to state a material  fact  required to be stated  therein or  necessary  in
order to make the statements  therein, in light of the circumstances under which
they were made, not misleading.

         3. Registration  Procedures.  In connection with any Shelf Registration
contemplated by Section 2 hereof and, to the extent  applicable,  any Registered
Exchange Offer contemplated by Section 1 hereof, the following  provisions shall
apply:

         (a) The  Issuer and the  Guarantor  shall (i)  furnish to each  Initial
Purchaser,  prior  to the  filing  thereof  with the  Commission,  a copy of the
Registration  Statement and each amendment thereof and each supplement,  if any,
to the prospectus  included therein and, in the event that an Initial  Purchaser
(with respect to any portion of an unsold allotment from the original  offering)
is  participating  in the Registered  Exchange Offer or the Shelf  Registration,
shall use their best  efforts to  reflect in each such  document,  when so filed
with the  Commission,  such comments as such Initial  Purchaser  reasonably  and
timely may propose;  (ii) include the information set forth in Annex A hereto on
the cover, in Annex B hereto in the "Exchange Offer Procedures"  section and the
"Purpose of the Exchange


<PAGE>


                                                                         7

Offer"  section and in Annex C hereto in the "Plan of  Distribution"  section of
the prospectus forming a part of the Exchange Offer  Registration  Statement and
include the information set forth in Annex D hereto in the Letter of Transmittal
delivered  pursuant to such Registered  Exchange Offer; (iii) if requested by an
Initial  Purchaser,  include  the  information  required  by Items 507 or 508 of
Regulation  S-K under the  Securities  Act,  as  applicable,  in the  prospectus
forming a part of the Exchange Offer Registration Statement; (iv) include within
the prospectus contained in the Exchange Offer Registration  Statement a section
entitled  "Plan  of   Distribution,"   reasonably   acceptable  to  the  Initial
Purchasers,  which shall contain a summary  statement of the positions  taken or
policies  made by the staff of the  Commission  with  respect  to the  potential
"underwriter"  status  of any  broker-dealer  that is the  beneficial  owner (as
defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the
"Exchange Act")) of Exchange  Securities  received by such broker-dealer in such
Registered  Exchange  Offer  (a  "Participating  Broker-Dealer"),  whether  such
positions  or  policies  have  been  publicly  disseminated  by the staff of the
Commission  or such  positions or policies,  in the  reasonable  judgment of the
Initial Purchasers based upon advice of counsel (which may be in-house counsel),
represent the prevailing  views of the staff of the  Commission;  and (v) in the
case of a Shelf Registration,  include the names of the Holders,  who propose to
sell  Securities  pursuant  to the  Shelf  Registration  Statement,  as  selling
securityholders.

         (b) The  Issuer and the  Guarantor  shall  give  written  notice to the
Initial  Purchasers,  the  Holders  of  the  Securities  and  any  Participating
Broker-Dealer  from whom the Issuer or  Guarantor  has  received  prior  written
notice that it will be a Participating  Broker-Dealer  in a Registered  Exchange
Offer (which notice pursuant to clauses  (ii)-(v) hereof shall be accompanied by
an instruction to suspend the use of the prospectus until the requisite  changes
have been made):

     (i) when the Registration Statement or any amendment thereto has been filed
with the Commission and when the  Registration  Statement or any  post-effective
amendment thereto has become effective;

     (ii) of any request by the  Commission for amendments or supplements to the
Registration  Statement or the  prospectus  included  therein or for  additional
information;

     (iii) of the issuance by the  Commission of any stop order  suspending  the
effectiveness of the Registration Statement or the initiation of any proceedings
for that purpose;

     (iv) of the receipt by the Issuer or the  Guarantor or their legal  counsel
of any notification  with respect to the suspension of the  qualification of the
Securities for sale in any  jurisdiction or the initiation or threatening of any
proceeding for such purpose; and



<PAGE>


                                                                         8

     (v) of the happening of any event that requires the Issuer or the Guarantor
to make changes in the  Registration  Statement or the  prospectus in order that
the  Registration  Statement  or the  prospectus  does  not  contain  an  untrue
statement of a material  fact nor omit to state a material  fact  required to be
stated therein or necessary to make the  statements  therein (in the case of the
prospectus,  in light of the  circumstances  under  which  they  were  made) not
misleading.

         (c) The Issuer and the Guarantor shall make every reasonable  effort to
obtain the withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Registration Statement.

         (d) The  Issuer  and the  Guarantor  shall  furnish  to each  Holder of
Securities  included  within the  coverage  of the Shelf  Registration,  without
charge,  at  least  one  copy  of  the  Shelf  Registration  Statement  and  any
post-effective amendment thereto,  including financial statements and schedules,
and,  if the Holder so  requests in writing,  all  exhibits  thereto  (including
those, if any, incorporated by reference).

         (e) The  Issuer and the  Guarantor  shall  deliver  to each  Exchanging
Dealer and each  Initial  Purchaser,  and to any other  Holder who so  requests,
without charge, at least one copy of the Exchange Offer  Registration  Statement
and any post-effective  amendment thereto,  including  financial  statements and
schedules,  and,  if any Initial  Purchaser  or any such  Holder  requests,  all
exhibits thereto (including those incorporated by reference).

         (f) The Issuer and the Guarantor shall,  during the Shelf  Registration
Period, deliver to each Holder of Securities included within the coverage of the
Shelf Registration,  without charge, as many copies of the prospectus (including
each preliminary  prospectus)  included in the Shelf Registration  Statement and
any amendment or supplement thereto as such person may reasonably  request.  The
Issuer and the Guarantor  consent,  subject to the provisions of this Agreement,
to the use of the  prospectus or any amendment or supplement  thereto by each of
the selling  Holders of the Securities in connection  with the offering and sale
of the  Securities  covered by the  prospectus,  or any  amendment or supplement
thereto, included in the Shelf Registration Statement.

         (g) The  Issuer  and  the  Guarantor  shall  deliver  to  each  Initial
Purchaser, any Exchanging Dealer, any Participating Broker-Dealer and such other
persons  required to deliver a  prospectus  following  the  Registered  Exchange
Offers,  without charge, as many copies of the final prospectus  included in the
Exchange Offer Registration Statement and any amendment or supplement thereto as
such  persons may  reasonably  request.  The Issuer and the  Guarantor  consent,
subject to the provisions of this Agreement, to the use of the prospectus or any
amendment or supplement  thereto by any Initial  Purchaser,  if  necessary,  any
Participating  Broker-Dealer  and such  other  persons  required  to  deliver  a
prospectus  following the  Registered  Exchange  Offers in  connection  with the
offering and sale of the


<PAGE>


                                                                         9

Exchange  Securities  covered by the prospectus,  or any amendment or supplement
thereto, included in such Exchange Offer Registration Statement.

         (h) Prior to any public  offering  of the  Securities,  pursuant to any
Registration  Statement,  the Issuer and the Guarantor shall register or qualify
or  cooperate  with the  Holders of the  Securities  included  therein and their
respective  counsel in connection with the  registration or qualification of the
Securities  for offer and sale under the  securities  or "blue sky" laws of such
states of the United States as any Holder of the Securities  reasonably requests
in writing and do any and all other acts or things  necessary  or  advisable  to
enable the offer and sale in such  jurisdictions  of the  Securities  covered by
such  Registration  Statement;  provided,  however,  that  the  Issuer  and  the
Guarantor  shall not be required to (i) qualify  generally to do business in any
jurisdiction  where they are not then so qualified or (ii) take any action which
would  subject  them  to  general  service  of  process  or to  taxation  in any
jurisdiction where they are not then so subject.

         (i) The Issuer and the Guarantor  shall  cooperate  with the Holders of
the Securities to facilitate the timely preparation and delivery of certificates
representing  the Securities to be sold pursuant to any  Registration  Statement
free of any restrictive legends and in such denominations and registered in such
names as the Holders may request a  reasonable  period of time prior to sales of
the Securities pursuant to such Registration Statement.

         (j) Upon the occurrence of any event  contemplated  by paragraphs  (ii)
through (v) of Section 3(b) above during the period for which the Issuer and the
Guarantor  are required to maintain an  effective  Registration  Statement,  the
Issuer  and the  Guarantor  shall  promptly  prepare  and file a  post-effective
amendment to the Registration Statement or a supplement (by way of incorporation
by reference from an Exchange Act report or otherwise) to the related prospectus
and any other required  document so that, as thereafter  delivered to Holders of
the Notes or purchasers of Securities, the prospectus will not contain an untrue
statement of a material  fact or omit to state any material  fact required to be
stated  therein or necessary  to make the  statements  therein,  in light of the
circumstances  under which they were made, not misleading.  If the Issuer or the
Guarantor notify the Initial  Purchasers,  the Holders of the Securities and any
known Participating Broker-Dealer in accordance with paragraphs (ii) through (v)
of Section 3(b) above to suspend the use of the  prospectus  until the requisite
changes to the  prospectus  have been made,  then the  Initial  Purchasers,  the
Holders  of the  Securities  and any  such  Participating  Broker-Dealers  shall
suspend use of such  prospectus,  and the period of  effectiveness  of the Shelf
Registration  Statement provided for in Section 2(b) above (unless and until the
Securities  covered  thereby are  eligible  for sale under Rule 144(k) under the
Securities  Act) or the Exchange Offer  Registration  Statement  provided for in
Section 1 above,  as the case may be,  shall be  extended  by the number of days
from and  including  the date of the giving of such notice to and  including the
date when the Initial  Purchasers,  the Holders of the  Securities and any known
Participating Broker-Dealer shall have received such amended


<PAGE>


                                                                         10

or supplemented prospectus pursuant to this Section 3(j).

         (k) Not later than the effective  date of the  applicable  Registration
Statement,  the Issuer and the  Guarantor  will  provide  CUSIP  numbers for the
Notes, the Exchange Securities or the Private Exchange  Securities,  as the case
may be, and provide the  applicable  trustee with printed  certificates  for the
Notes, the Exchange Securities or the Private Exchange  Securities,  as the case
may be, in forms eligible for deposit with The Depository Trust Company.

         (l) The  Issuer  and the  Guarantor  will  comply  with all  rules  and
regulations  of the  Commission to the extent and so long as they are applicable
to the Registered  Exchange Offers or the Shelf  Registration  and the Guarantor
will make  generally  available  to the Issuer's  and the  Guarantor's  security
holders (or otherwise provide in accordance with Section 11(a) of the Securities
Act) an earnings  statement  satisfying  the  provisions of Section 11(a) of the
Securities  Act, no later than 45 days after the end of a 12-month period (or 90
days,  if such period is a fiscal  year)  beginning  with the first month of the
Guarantor's  first fiscal  quarter  commencing  after the effective  date of the
Registration Statement, which statement shall cover such 12-month period.

         (m) The  Issuer  and the  Guarantor  shall  cause the  Indenture  to be
qualified under the Trust Indenture Act of 1939, as amended,  in a timely manner
and  containing   such  changes,   if  any,  as  shall  be  necessary  for  such
qualification.   In  the  event  that  such  qualification   would  require  the
appointment of a new trustee under the  Indenture,  the Issuer and the Guarantor
shall appoint a new trustee thereunder pursuant to the applicable  provisions of
such Indenture.

         (n) The Issuer and the  Guarantor may require each Holder of Securities
to be sold pursuant to the Shelf Registration Statement to furnish to the Issuer
and the Guarantor such information regarding the Holder, his or her ownership of
Securities  and  the  distribution  of the  Securities  as the  Issuer  and  the
Guarantor  may from time to time  reasonably  require for inclusion in the Shelf
Registration  Statement,  and the Issuer and the Guarantor may exclude from such
registration the Securities of any Holder that fails to furnish such information
within a reasonable time after receiving such request.

         (o) The  Issuer  and the  Guarantor  shall  enter  into such  customary
agreements (including if requested an underwriting  agreement in customary form)
and take all such other action,  if any, as any Holder of the  Securities  shall
reasonably  request in order to facilitate  the  disposition  of the  Securities
pursuant to any Shelf Registration.

         (p) In the case of any Shelf Registration, the Issuer and the Guarantor
shall  (i) make  reasonably  available  for  inspection  by the  Holders  of the
Securities,  any underwriter  participating  in any disposition  pursuant to the
Shelf Registration Statement


<PAGE>


                                                                         11

and any  attorney,  accountant  or other  agent  retained  by the Holders of the
Securities or any such  underwriter  all relevant  financial and other  records,
pertinent corporate documents and properties of the Issuer and the Guarantor and
(ii) cause the  Issuer's and the  Guarantor's  officers,  directors,  employees,
accountants and auditors to supply all relevant information reasonably requested
by the Holders of the Securities or any such underwriter,  attorney,  accountant
or agent in connection with the Shelf Registration  Statement,  in each case, as
shall be reasonably  necessary to enable such  persons,  to conduct a reasonable
investigation  within the meaning of Section 11 of the Securities Act; provided,
however,  that the  foregoing  inspection  and  information  gathering  shall be
coordinated  on behalf  of the  Initial  Purchasers  by you and on behalf of the
other parties,  by one counsel designated by and on behalf of such other parties
as  described  in  Section  4  hereof;  provided,  further,  that  any  records,
documents,  properties or information  that are designated by the Issuer and the
Guarantor as  confidential  at the time of delivery of such records,  documents,
properties or information shall be kept confidential by such persons, unless (i)
such records,  documents,  properties or information are in the public domain or
otherwise  publicly  available,  (ii)  disclosure  of such  records,  documents,
properties or information is required by court or administrative  order or (iii)
disclosure of such records, documents, properties or information, in the written
opinion of counsel to such  person,  is  otherwise  required by law  (including,
without limitation, pursuant to the requirements of the Securities Act).

         (q)  In  the  case  of any  Shelf  Registration,  the  Issuer  and  the
Guarantor, if requested by any Holder of Securities covered thereby, shall cause
(i) their  counsel to deliver an opinion  and  updates  thereof  relating to the
Securities  in  customary  form  addressed  to such  Holders  and  the  managing
underwriters, if any, thereof and dated, in the case of the initial opinion, the
effective  date of such Shelf  Registration  Statement (it being agreed that the
matters to be covered by such opinion shall include, without limitation, the due
incorporation  and  good  standing  of  the  Issuer,  the  Guarantor  and  their
subsidiaries;  the due  authorization,  execution  and  delivery of the relevant
agreement of the type referred to in Section 3(o) hereof; the due authorization,
execution,  authentication and issuance, and the validity and enforceability, of
the applicable Securities;  the absence of governmental approvals required to be
obtained in connection with the Shelf Registration  Statement,  the offering and
sale of the applicable  Securities,  or any agreement of the type referred to in
Section  3(o)  hereof;  the  compliance  as to form of such  Shelf  Registration
Statement  and  any  documents  incorporated  by  reference  therein  and of the
Indentures  with the  requirements of the Securities Act and the Trust Indenture
Act,  respectively;  and, as of the date of the opinion and as of the  effective
date of the Shelf Registration Statement or most recent post-effective amendment
thereto, as the case may be, the absence from such Shelf Registration  Statement
and the prospectus included therein,  as then amended or supplemented,  and from
any  documents  incorporated  by reference  therein of an untrue  statement of a
material  fact or the omission to state  therein a material  fact required to be
stated  therein or necessary to make the  statements  therein not misleading (in
the case of


<PAGE>


                                                                         12

any such documents,  in the light of the circumstances existing at the time that
such  documents were filed with the  Commission  under the Exchange  Act);  (ii)
their officers to execute and deliver all customary  documents and  certificates
and updates thereof  reasonably  requested by any underwriters of the applicable
Securities  and (iii) their  independent  public  accountants  to provide to the
selling  Holders of the  applicable  Securities and any  underwriter  therefor a
comfort  letter in customary form and covering  matters of the type  customarily
covered in comfort  letters in connection with primary  underwritten  offerings,
subject to receipt of appropriate  documentation  as  contemplated,  and only if
permitted, by Statement of Auditing Standards No. 72.

         (r) In the case of the Registered  Exchange  Offer, if requested by any
Initial Purchaser or any known Participating  Broker-Dealer,  the Issuer and the
Guarantor shall cause (i) their counsel to deliver to such Initial  Purchaser or
such  Participating  Broker-  Dealer a signed  opinion  in the form set forth in
Section 6(a) of the  Purchase  Agreement  with such changes as are  customary in
connection  with the  preparation  of a  Registration  Statement  and (ii) their
independent  public  accountants  to deliver to such  Initial  Purchaser or such
Participating  Broker-Dealer  a comfort letter,  in customary form,  meeting the
requirements  as to the  substance  thereof as set forth in Sections 8(a) of the
Purchase Agreement, with appropriate date changes.

         (s) If a  Registered  Exchange  Offer or a  Private  Exchange  is to be
consummated,  upon  delivery  of the  Notes by  Holders  to the  Issuer  and the
Guarantor (or to such other Person as directed by the Issuer and the  Guarantor)
in exchange for the Exchange Securities or the Private Exchange  Securities,  as
the case may be, the Issuer and the Guarantor shall mark, or cause to be marked,
on the Notes so exchanged that such Notes are being canceled in exchange for the
Exchange Securities or the Private Exchange  Securities,  as the case may be; in
no event shall the Notes be marked as paid or otherwise satisfied.

         (t) The Issuer and the Guarantor shall (a) if the Notes have been rated
prior to the initial sale of such Notes,  use their best efforts to confirm such
ratings will apply to the Securities covered by a Registration Statement, or (b)
if the Notes were not previously rated, use commercially  reasonable  efforts to
cause the Securities  covered by a  Registration  Statement to be rated with the
appropriate  rating  agencies,  if so  requested  by Holders  of a  majority  in
aggregate principal amount of Securities covered by such Registration Statement,
or by the managing underwriters, if any.

         (u) In the event that any  broker-dealer  registered under the Exchange
Act  shall   underwrite  any  Securities  or  participate  as  a  member  of  an
underwriting  syndicate or selling group or "assist in the distribution" (within
the meaning of the  Conduct  Rules of the  National  Association  of  Securities
Dealers, Inc. ("NASD")) thereof, whether as a Holder of such Securities or as an
underwriter, a placement or sales agent or a broker or


<PAGE>


                                                                         13

dealer in respect  thereof,  or otherwise,  the Issuer and the  Guarantor  shall
assist such  broker-dealer  in complying with the  requirements  of such Conduct
Rules,  including,  without  limitation,  by (i) if Rule 2720  thereto  shall so
require,  engaging (solely,  except in the case of an Initial Purchaser, at such
broker-dealer's  expense) a "qualified  independent  underwriter" (as defined in
Rule 2720) to  participate  in the  preparation  of the  Registration  Statement
relating to such  Securities,  to exercise  usual  standards of due diligence in
respect  thereto  and,  if any  portion  of the  offering  contemplated  by such
Registration  Statement  is an  underwritten  offering  or  is  made  through  a
placement  or sales  agent,  to  recommend  the yield of such  Securities,  (ii)
indemnifying  any such  qualified  independent  underwriter to the extent of the
indemnification of underwriters provided in Section 5 hereof and (iii) providing
such  information  to such  broker-dealer  as may be  required in order for such
broker-dealer  to comply with the  requirements of the Rules of Fair Practice of
the NASD.

         (v) The Issuer and the  Guarantor  shall use their best efforts to take
all other steps necessary to effect the  registration of the Securities  covered
by a Registration Statement contemplated hereby.

         4.  Registration  Expenses.  The  Guarantor  shall  bear  all  fees and
expenses  incurred  by the  Issuer  and the  Guarantor  in  connection  with the
performance of their obligations  under Sections 1 through 3 hereof,  whether or
not the respective Registered Exchange Offer or a Shelf Registration is filed or
becomes  effective,  and,  in the event of a Shelf  Registration,  shall bear or
reimburse the Holders of the Securities  covered thereby for the reasonable fees
and disbursements of one firm of counsel designated by the Holders of a majority
in principal amount of the Securities  covered thereby to act as counsel for the
Holders of the Securities in connection therewith. Each Holder of the Securities
shall pay all  underwriting  discounts,  if any,  and  commissions  and transfer
taxes, if any, relating to the sale or disposition of such Holder's Securities.

         5.  Indemnification.  (a) The Issuer and the  Guarantor  severally  and
jointly agree to indemnify and hold harmless each Holder of the Securities,  any
Participating  Broker- Dealer and each person,  if any, who controls such Holder
or such Participating Broker- Dealer within the meaning of the Securities Act or
the  Exchange  Act  (each  Holder,  any  Participating  Broker-Dealer  and  such
controlling  persons are referred to collectively as the "Indemnified  Parties")
from and against any losses, claims,  damages or liabilities,  joint or several,
or any actions in respect  thereof  (including,  but not limited to, any losses,
claims,  damages,  liabilities or actions relating to purchases and sales of the
Securities)  to which  each  Indemnified  Party  may  become  subject  under the
Securities Act, the Exchange Act or otherwise,  insofar as such losses,  claims,
damages,  liabilities  or  actions  arise  out of or are based  upon any  untrue
statement  or  alleged  untrue  statement  of a  material  fact  contained  in a
Registration  Statement or prospectus or in any amendment or supplement  thereto
or in any preliminary prospectus relating to a Shelf Registration,  or arise out
of,


<PAGE>


                                                                         14

or are based upon, the omission or alleged  omission to state therein a material
fact required to be stated therein or necessary to make the  statements  therein
not misleading,  and shall reimburse,  as incurred,  the Indemnified Parties for
any legal or other  expenses  reasonably  incurred  by them in  connection  with
investigating or defending any such loss, claim, damage,  liability or action in
respect thereof; provided,  however, that (i) the Issuer and the Guarantor shall
not be liable in any such case to the extent  that such loss,  claim,  damage or
liability  arises out of or is based upon any untrue statement or alleged untrue
statement or omission or alleged  omission made in a  Registration  Statement or
prospectus  or in any  amendment  or  supplement  thereto or in any  preliminary
prospectus  relating to a Shelf  Registration in reliance upon and in conformity
with written  information  pertaining to such Holder and furnished to the Issuer
or the  Guarantor  by or on behalf of such  Holder  specifically  for  inclusion
therein  and (ii) with  respect to any untrue  statement  or omission or alleged
untrue  statement or omission made in any preliminary  prospectus  relating to a
Shelf  Registration  Statement,   the  indemnity  agreement  contained  in  this
subsection  (a) shall not inure to the  benefit of any  Holder or  Participating
Broker-Dealer from whom the person asserting any such losses, claims, damages or
liabilities purchased the Securities concerned,  to the extent that a prospectus
relating  to such  Securities  was  required to be  delivered  by such Holder or
Participating  Broker-Dealer  under the Securities  Act in connection  with such
purchase  and any such  loss,  claim,  damage  or  liability  of such  Holder or
Participating  Broker-Dealer  results  from the fact that  there was not sent or
given to such  person,  at or prior to the written  confirmation  of the sale of
such Securities to such person, a copy of the final prospectus if the Issuer and
the  Guarantor  had  previously  furnished  copies  thereof  to such  Holder  or
Participating  Broker-Dealer;  provided  further,  however,  that this indemnity
agreement  will  be in  addition  to any  liability  which  the  Issuer  and the
Guarantor  may  otherwise  have to such  Indemnified  Party.  The Issuer and the
Guarantor  shall also indemnify  underwriters,  their officers and directors and
each person who controls such underwriters  within the meaning of the Securities
Act or the Exchange Act to the same extent as provided above with respect to the
indemnification of the Holders of the Securities if requested by such Holders.

         (b) Each Holder of the  Securities,  severally  and not  jointly,  will
indemnify and hold  harmless the Issuer and the  Guarantor  and each person,  if
any,  who  controls  the Issuer  and the  Guarantor  within  the  meaning of the
Securities Act or the Exchange Act from and against any losses,  claims, damages
or  liabilities  or any actions in respect  thereof,  to which the Issuer or the
Guarantor or any such controlling person may become subject under the Securities
Act, the Exchange Act or  otherwise,  insofar as such losses,  claims,  damages,
liabilities  or actions  arise out of or are based upon any untrue  statement or
alleged  untrue  statement  of a  material  fact  contained  in  a  Registration
Statement or  prospectus  or in any  amendment or  supplement  thereto or in any
preliminary prospectus relating to a Shelf Registration,  or arise out of or are
based upon the  omission or alleged  omission to state  therein a material  fact
necessary to make the statements  therein not misleading,  but in each case only
to the extent that the untrue statement or omission or


<PAGE>


                                                                         15

alleged untrue statement or omission was made in reliance upon and in conformity
with written  information  pertaining to such Holder and furnished to the Issuer
or the  Guarantor  by or on behalf of such  Holder  specifically  for  inclusion
therein;  and,  subject to the limitation set forth  immediately  preceding this
clause, shall reimburse, as incurred, the Issuer and the Guarantor for any legal
or other expenses reasonably incurred by the Issuer or the Guarantor or any such
controlling  person in  connection  with  investigating  or defending  any loss,
claim, damage,  liability or action in respect thereof. This indemnity agreement
will be in addition to any liability which such Holder may otherwise have to the
Issuer and the Guarantor or any of their controlling persons.

         (c) Promptly after receipt by an indemnified party under this Section 5
of  notice  of the  commencement  of  any  action  or  proceeding  (including  a
governmental investigation),  such indemnified party will, if a claim in respect
thereof is to be made  against  the  indemnifying  party  under this  Section 5,
notify the indemnifying party of the commencement  thereof;  but the omission so
to  notify  the  indemnifying  party  will  not,  in  any  event,   relieve  the
indemnifying  party from any obligations to any indemnified party other than the
indemnification  obligation  provided in paragraph (a) or (b) above. In case any
such  action is brought  against any  indemnified  party,  and it  notifies  the
indemnifying party of the commencement  thereof,  the indemnifying party will be
entitled to  participate  therein  and, to the extent that it may wish,  jointly
with any other  indemnifying  party  similarly  notified,  to assume the defense
thereof,  with counsel  reasonably  satisfactory to such indemnified  party (who
shall not, except with the consent of the  indemnified  party, be counsel to the
indemnifying  party),  and  after  notice  from the  indemnifying  party to such
indemnified  party  of  its  election  so to  assume  the  defense  thereof  the
indemnifying  party  will not be liable to such  indemnified  party  under  this
Section  5 for any  legal or other  expenses,  other  than  reasonable  costs of
investigation,  subsequently  incurred by such  indemnified  party in connection
with the defense thereof. No indemnifying party shall, without the prior written
consent of the  indemnified  party,  effect  any  settlement  of any  pending or
threatened  action in  respect of which any  indemnified  party is or could have
been a party and indemnity could have been sought  hereunder by such indemnified
party  unless  such  settlement  includes  an  unconditional   release  of  such
indemnified  party from all liability on any claims that are the subject  matter
of such action.

         (d)  If  the  indemnification   provided  for  in  this  Section  5  is
unavailable  or  insufficient  to  hold  harmless  an  indemnified  party  under
subsections (a) or (b) above, then each  indemnifying  party shall contribute to
the amount paid or payable by such indemnified  party as a result of the losses,
claims,  damages or liabilities (or actions in respect  thereof)  referred to in
subsection (a) or (b) above (i) in such  proportion as is appropriate to reflect
the relative benefits  received by the indemnifying  party or parties on the one
hand and the indemnified  party on the other from the exchange of the respective
Notes,  pursuant to the  relevant  Registered  Exchange  Offers,  or (ii) if the
allocation  provided by the foregoing  clause (i) is not permitted by applicable
law, in such proportion


<PAGE>


                                                                         16

as is  appropriate  to reflect  not only the  relative  benefits  referred to in
clause  (i)  above  but also the  relative  fault of the  indemnifying  party or
parties  on the one hand and the  indemnified  party on the other in  connection
with the statements or omissions that resulted in such losses,  claims,  damages
or  liabilities  (or actions in respect  thereof) as well as any other  relevant
equitable considerations.  The relative fault of the parties shall be determined
by  reference  to,  among other  things,  whether  the untrue or alleged  untrue
statement  of a material  fact or the  omission  or alleged  omission to state a
material fact relates to information  supplied by the Issuer or the Guarantor on
the one hand or such Holder or such other indemnified party, as the case may be,
on the other, and the parties' relative intent, knowledge, access to information
and  opportunity  to correct or prevent such  statement or omission.  The amount
paid by an  indemnified  party as a result of the  losses,  claims,  damages  or
liabilities  referred to in the first  sentence of this  subsection (d) shall be
deemed  to  include  any legal or other  expenses  reasonably  incurred  by such
indemnified  party in connection with  investigating  or defending any action or
claim which is the subject of this  subsection  (d).  Notwithstanding  any other
provision  of this  Section  5(d),  the Holders of the  Securities  shall not be
required  to  contribute  any  amount in  excess of the  amount by which the net
proceeds received by such Holders from the sale of the Securities  pursuant to a
Registration  Statement  exceeds the amount of damages  which such  Holders have
otherwise  been  required  to pay by reason of such  untrue  or  alleged  untrue
statement  or  omission  or alleged  omission.  No person  guilty of  fraudulent
misrepresentation  (within the meaning of Section 11(f) of the  Securities  Act)
shall be  entitled  to  contribution  from any person who was not guilty of such
fraudulent  misrepresentation.  For purposes of this paragraph (d), each person,
if any, who controls such indemnified party within the meaning of the Securities
Act or the  Exchange  Act shall  have the same  rights to  contribution  as such
indemnified  party and each  person,  if any,  who  controls  the  Issuer or the
Guarantor  within the meaning of the  Securities  Act or the  Exchange Act shall
have the same rights to contribution as the Issuer and the Guarantor.

         (e) The  agreements  contained in this Section 5 shall survive the sale
of the Securities pursuant to a Registration  Statement and shall remain in full
force  and  effect,  regardless  of any  termination  or  cancellation  of  this
Agreement or any investigation made by or on behalf of any indemnified party.

         6.  Additional  Interest  Under Certain  Circumstances.  (a) Additional
interest (the  "Additional  Interest")  with respect to the Securities  shall be
assessed  as follows if any of the  following  events  occur (each such event in
clauses (i) through (iii) below a "Registration Default"):

         (i) If by September 22, 1997,  neither the Exchange Offer  Registration
Statement  nor a  Shelf  Registration  Statement  relating  to  such  series  of
Securities has been filed with the Commission;



<PAGE>


                                                                         17

         (ii) If by February  4, 1997,  neither the  Registered  Exchange  Offer
relating to such series of  Securities is  consummated  nor, if required in lieu
thereof, a Shelf Registration Statement relating to such series of Securities is
declared effective by the Commission; or

         (iii) If, after  February 4, 1997,  and after either the Exchange Offer
Registration  Statement  or the Shelf  Registration  Statement  relating to such
series of  Securities  is declared  effective  (A) such  Registration  Statement
thereafter ceases to be effective (except as permitted in paragraph (b)); or (B)
such  Registration  Statement  or the  related  prospectus  ceases  to be usable
(except as permitted in paragraph  (b)) in  connection  with resales of Transfer
Restricted Securities during the periods specified herein because either (1) any
event  occurs as a result of which the related  prospectus  forming part of such
Registration  Statement would include any untrue statement of a material fact or
omit to state any material fact necessary to make the statements  therein in the
light of the circumstances under which they were made not misleading,  or (2) it
shall be  necessary  to amend such  Registration  Statement  or  supplement  the
related prospectus, to comply with the Securities Act or the Exchange Act or the
respective  rules  thereunder (such period of time during which the Registration
Statement  is  not  effective  or the  Registration  Statement  or  the  related
prospectus is not useable being referred to as a "Blackout Period").

Additional  Interest shall accrue on the Securities  covered by the Registration
Statement to which the Registration  Default relates over and above the interest
set forth in the title of such  Securities  from and including the date on which
any such Registration Default shall occur to but excluding the date on which all
such Registration Defaults relating to the Securities have been cured, at a rate
of 0.50% per annum (the "Additional Interest Rate").

         (b) A Blackout Period referred to in Section  6(a)(iii) shall be deemed
not to be a Registration Default in relation to a Registration  Statement or the
related prospectus if (i) the Blackout Period has occurred solely as a result of
(x)  the  filing  of a  post-effective  amendment  to  such  Shelf  Registration
Statement to incorporate  annual audited  financial  information with respect to
the Issuer or the  Guarantor  where  such  post-effective  amendment  is not yet
effective  and  needs to be  declared  effective  to permit  Holders  to use the
related  prospectus or (y) the occurrence of other material  events with respect
to the  Issuer  or the  Guarantor  that  would  need  to be  described  in  such
Registration  Statement or the related prospectus and (ii) in the case of clause
(y), the Issuer and the Guarantor are  proceeding  promptly and in good faith to
amend or supplement (including by way of filing documents under the Exchange Act
which are  incorporated  by  reference  into the  Registration  Statement)  such
Registration Statement and related prospectus to describe such events; provided,
however, that in any case if such Blackout Period occurs for a continuous period
in excess of 45 days, a Registration Default shall be deemed to have occurred on
the 46th day of such Blackout Period and Additional Interest shall be payable in
accordance  with the  above  paragraph  from the day such  Registration  Default
occurs  until  such  Registration  Default  is cured or until the  Company is no
longer required pursuant to


<PAGE>


                                                                         18

this  Agreement  to  keep  such   Registration   Statement   effective  or  such
Registration Statement or Prospectus useable.

         (c) Any amounts of Additional  Interest due pursuant to clause  (a)(i),
(a)(ii) or (a)(iii) of Section 6 above will be payable in cash, on each Interest
Payment Date (as defined in the indenture governing the Securities),  commencing
with the first such Interest Payment Date following the applicable  Registration
Default. The amount of Additional Interest will be determined by multiplying the
Additional Interest Rate by the principal amount of such Securities,  multiplied
by a  fraction,  the  numerator  of which is the number of days such  Additional
Interest Rate was  applicable  during such period  (determined on the basis of a
360-day year comprised of twelve 30-day months), and the denominator of which is
360.  Payments  of  Additional  Interest on the  Securities  will be made to the
Holders of such Securities on the regular record date immediately  preceding the
relevant Additional Interest payment date .

         (d) "Transfer Restricted  Securities" means each Security until (i) the
date on  which  such  Security  has been  exchanged  by a  person  other  than a
broker-dealer  for a freely  transferrable  Exchange  Security in the Registered
Exchange Offer,  (ii) following the exchange by a broker-dealer  in a Registered
Exchange Offer of such Security for an Exchange Security, the date on which such
Exchange Security is sold to a purchaser who receives from such broker-dealer on
or prior  to the date of such  sale a copy of the  prospectus  contained  in the
Exchange Offer Registration Statement, (iii) the date on which such Security has
been  effectively  registered  under  the  Securities  Act  and  disposed  of in
accordance with the Shelf Registration  Statement or (iv) the date on which such
Security is distributed to the public  pursuant to Rule 144 under the Securities
Act or is saleable pursuant to Rule 144(k) under the Securities Act.

         7. Rules 144 and 144A.  The Issuer  and the  Guarantor  shall use their
best  efforts  to file  the  reports  required  to be filed  by them  under  the
Securities  Act and the Exchange Act in a timely  manner and, if at any time the
Issuer and the Guarantor are not required to file such reports,  they will, upon
the  request of any Holder of  Transfer  Restricted  Securities,  make  publicly
available  other  information  so long as  necessary  to  permit  sales of their
securities pursuant to Rules 144 and 144A. The Issuer and the Guarantor covenant
that they will take such  further  action as any Holder of  Transfer  Restricted
Securities may reasonably request,  all to the extent required from time to time
to  enable  such  Holder  to  sell  Transfer   Restricted   Securities   without
registration  under the  Securities  Act within the limitation of the exemptions
provided by Rules 144 and 144A (including the requirements of Rule  144A(d)(4)).
The  Issuer  and  the  Guarantor  will  provide  a copy  of  this  Agreement  to
prospective  purchasers of Notes (or Private Exchange Securities)  identified to
the Issuer and the Guarantor by the Initial  Purchasers  upon request.  Upon the
request  of any Holder of  Transfer  Restricted  Securities,  the Issuer and the
Guarantor  shall  deliver to such Holder a written  statement as to whether they
have complied with such requirements.


<PAGE>


                                                                         19

Notwithstanding  the  foregoing,  nothing  in this  Section 7 shall be deemed to
require the Issuer and the Guarantor to register any of its securities  pursuant
to the Exchange Act.

         8.  Underwritten  Registrations.  If  any of  the  Transfer  Restricted
Securities  covered by any Shelf  Registration are to be sold in an underwritten
offering,  the investment  banker or investment  bankers and manager or managers
that will administer the offering ("Managing  Underwriters") will be selected by
the  Holders  of a  majority  in  aggregate  principal  amount of such  Transfer
Restricted Securities to be included in such offering.

         No person may participate in any  underwritten  registration  hereunder
unless  such  person  (i)  agrees  to sell  such  person's  Transfer  Restricted
Securities on the basis  reasonably  provided in any  underwriting  arrangements
approved by the persons entitled hereunder to approve such arrangements and (ii)
completes  and executes  all  questionnaires,  powers of attorney,  indemnities,
underwriting  agreements and other documents reasonably required under the terms
of such underwriting arrangements.

         9.  Miscellaneous.

         (a) Amendments and Waivers. The provisions of this Agreement may not be
amended,  modified or  supplemented,  and waivers or consents to departures from
the provisions  hereof may not be given,  except by the Issuer and the Guarantor
and the written consent of the Holders of a majority in principal  amount of the
Securities  affected  by such  amendment,  modification,  supplement,  waiver or
consents.

         (b)  Notices.  All notices  and other  communications  provided  for or
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

                  (1) if to a Holder  of the  Securities,  at the  most  current
address given by such Holder to the Issuer and the Guarantor in accordance  with
the provisions of this Section 9(b).

                  (2)  if to the Initial Purchasers, at the following address:

                           Credit Suisse First Boston Corporation
                           Eleven Madison Avenue
                           New York, NY 10010
                           Fax No.:  (212) 318-0532
                           Attention:  Transactions Advisory Group



<PAGE>


                                                                         20

         with a copy to:

                           Cravath, Swaine & Moore
                           Worldwide Plaza
                           825 Eighth Avenue
                           New York, NY 10019-7475
                           Attention:  Kris F. Heinzelman

                  (3)      if to the Guarantor, at the following address:

                           WinStar Communications, Inc.
                           230 Park Avenue
                           New York, NY 10169
                           Attention:  Timothy Graham

         with a copy to:

                           Graubard Mollen & Miller
                           600 Third Avenue
                           New York, NY  10016
                           Attention:  David A. Miller

                  (4)      if to the Issuer, at the following address:

                           WinStar Equipment II Corp.
                           1577 Spring Hill Road, 6th Floor
                           Vienna, Virginia 22182
                           Attention:  General Counsel

         with a copy to:

                           Graubard Mollen & Miller
                           600 Third Avenue
                           New York, NY 10016
                           Attention:  David A. Miller

         All such notices and  communications  shall be deemed to have been duly
given:  at the time delivered by hand, if personally  delivered;  three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's  facsimile machine operator, if sent by facsimile
transmission;  and on the  day  delivered,  if  sent by  overnight  air  courier
guaranteeing next day delivery.



<PAGE>


                                                                         21

         (c) No Inconsistent Agreements.  The Issuer and the Guarantor have not,
as of the date  hereof,  entered  into,  nor  shall  they,  on or after the date
hereof,  enter into,  any  agreement  with respect to their  securities  that is
inconsistent  with  the  rights  granted  to the  Holders  herein  or  otherwise
conflicts with the provisions hereof.

     (d) Successors and Assigns. This Agreement shall be binding upon the Issuer
and the Guarantor and their successors and assigns.

         (e)  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.

     (f)  Headings.  The  headings  in this  Agreement  are for  convenience  of
reference only and shall not limit or otherwise affect the meaning hereof.

     (g) Governing  Law. THIS  AGREEMENT  SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE  WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

         (h)  Severability.  If 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.

         (i)  Securities  Held by the  Issuer  or the  Guarantor.  Whenever  the
consent or approval of Holders of a specified  percentage of principal amount of
Securities is required hereunder, Securities held by the Issuer or the Guarantor
or their  affiliates  (other  than  subsequent  Holders  of  Securities  if such
subsequent  Holders  are  deemed  to be  affiliates  solely  by  reason of their
holdings of such  Securities)  shall not be counted in determining  whether such
consent or approval was given by the Holders of such required percentage.



<PAGE>


                                                                         22

         If the  foregoing  is in  accordance  with  your  understanding  of our
agreement,  please sign and return to the Issuer and the Guarantor a counterpart
hereof,  whereupon this instrument,  along with all counterparts,  will become a
binding  agreement  among the  several  Initial  Purchasers,  the Issuer and the
Guarantor in accordance with its terms.

                                       Very truly yours,

                                       WINSTAR COMMUNICATIONS, INC., as
                                       Guarantor


                                       By:
                                          ---------------------------
                                          Name:
                                          Title:


                                       WINSTAR EQUIPMENT II CORP., as
                                       Issuer


                                       By:
                                          ---------------------------
                                          Name:
                                          Title:


The foregoing Registration
Rights Agreement is hereby confirmed
and accepted as of the date first
above written.

CREDIT SUISSE FIRST BOSTON CORPORATION
BT SECURITIES CORPORATION

By:  CREDIT SUISSE FIRST BOSTON CORPORATION




         By:
            -----------------------------
            Name:
            Title:



<PAGE>



                                                                     ANNEX A




         Each  broker-dealer  that  receives  Exchange  Securities  for  its own
account  pursuant to an Exchange Offer must  acknowledge  that it will deliver a
prospectus in connection with any resale of such Exchange Securities. The Letter
of Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning  of the  Securities  Act.  This  Prospectus,  as it may  be  amended  or
supplemented  from time to time,  may be used by a  broker-dealer  in connection
with  resales of Exchange  Securities  received in exchange for Notes where such
Notes  were  acquired  by  such  broker-dealer  as  a  result  of  market-making
activities or other trading activities. The Issuer and the Guarantor have agreed
that,  for a period of 180 days after the Expiration  Date (as defined  herein),
they  will  make  this  Prospectus  available  to any  broker-dealer  for use in
connection with any such resale. See "Plan of Distribution."

                                       A-1

<PAGE>



                                                                     ANNEX B



     Each broker-dealer that receives Exchange Securities for its own account in
exchange for Notes,  where such Notes were acquired by such  broker-dealer  as a
result of market-making activities or other trading activities, must acknowledge
that it will deliver a prospectus in connection with any resale of such Exchange
Securities. See "Plan of Distribution."


                                       B-1

<PAGE>



                                                                     ANNEX C



PLAN OF DISTRIBUTION

     Each  broker-dealer  that receives Exchange  Securities for its own account
pursuant to an Exchange Offer must acknowledge that it will deliver a prospectus
in connection with any resale of such Exchange Securities.  This Prospectus,  as
it may be  amended  or  supplemented  from  time  to  time,  may  be  used  by a
broker-dealer  in  connection  with resales of Exchange  Securities  received in
exchange for Notes where such Notes were  acquired as a result of  market-making
activities or other trading activities. The Issuer and the Guarantor have agreed
that,  for a period of 180 days  after the  Expiration  Date,  it will make this
prospectus,  as amended or supplemented,  available to any broker-dealer for use
in connection with any such resale.  In addition,  until  _____________ , 199_ ,
all dealers effecting transactions in the Exchange Securities may be required to
deliver a prospectus.(1)

         The Issuer and the  Guarantor  will not receive any  proceeds  from any
sale of Exchange  Securities by broker-dealers.  Exchange Securities received by
broker-dealers  for their own account  pursuant to an Exchange Offer may be sold
from time to time in one or more transactions in the over-the-counter market, in
negotiated  transactions,  through  the  writing  of  options  on  the  Exchange
Securities  or a  combination  of such  methods  of  resale,  at  market  prices
prevailing at the time of resale,  at prices related to such  prevailing  market
prices or negotiated  prices. Any such resale may be made directly to purchasers
or to or through brokers or dealers who may receive  compensation in the form of
commissions or concessions from any such  broker-dealer or the purchasers of any
such Exchange  Securities.  Any broker-dealer  that resells Exchange  Securities
that were received by it for its own account  pursuant to an Exchange  Offer and
any  broker or dealer  that  participates  in a  distribution  of such  Exchange
Securities  may be deemed  to be an  "underwriter"  within  the  meaning  of the
Securities Act and any profit on any such resale of Exchange  Securities and any
commission  or  concessions  received  by any such  persons  may be deemed to be
underwriting  compensation  under the Securities  Act. The Letter of Transmittal
states  that,  by  acknowledging  that  it  will  deliver  and by  delivering  a
prospectus,  a  broker-dealer  will  not  be  deemed  to  admit  that  it  is an
"underwriter" within the meaning of the Securities Act.

         For a period of 180 days after the  Expiration  Date the Issuer and the
Guarantor  will  promptly  send  additional  copies of this  Prospectus  and any
amendment or supplement to this  Prospectus to any  broker-dealer  that requests
such documents in the Letter of Transmittal. The Guarantor has agreed to pay all
expenses incidental to the Exchange Offers (including the reasonable expenses of
one counsel for the Holders of the Securities)

- --------
1. In addition, the legend required by Item 502(e) of Regulation S-K will appear
on the back cover page of the Exchange Offer prospectus.

                                       C-1

<PAGE>


                                                                

other than  commissions  or  concessions  of any  brokers  or  dealers  and will
indemnify the Holders of the Securities  (including any broker-dealers)  against
certain liabilities, including liabilities under the Securities Act.

                                       C-2

<PAGE>


                                                                     ANNEX D



|_|      CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE
         10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY
         AMENDMENTS OR SUPPLEMENTS THERETO.

                  Name:___________________________________________

                  Address: _______________________________________

                           _______________________________________

If the undersigned is not a broker-dealer, the undersigned represents that it is
not  engaged  in, and does not intend to engage in, a  distribution  of Exchange
Securities.  If the  undersigned is a broker-dealer  that will receive  Exchange
Securities  for its own  account in exchange  for Notes that were  acquired as a
result of market-making activities or other trading activities,  it acknowledges
that it will deliver a prospectus in connection with any resale of such Exchange
Securities;  however,  by so acknowledging  and by delivering a prospectus,  the
undersigned will not be deemed to admit that it is an  "underwriter"  within the
meaning of the Securities Act.

                                       D-1

<PAGE>



                                                               EXECUTION COPY


                                    SECURITY  AGREEMENT  dated as of  August  1,
                           1997,  between WINSTAR EQUIPMENT II CORP., a Delaware
                           corporation (the "Grantor"),  and UNITED STATES TRUST
                           COMPANY OF NEW YORK, a New York  banking  corporation
                           ("U.S.   Trust"),   as  collateral   agent  (in  such
                           capacity,  the  "Collateral  Agent")  for the Secured
                           Parties (as defined herein).

         Reference  is made to the  Indenture  dated as of  August  1,  1997 (as
amended, supplemented or otherwise modified from time to time, the "Indenture"),
among the Grantor, WinStar Communications,  Inc., as guarantor (the "Guarantor")
and U.S. Trust, as trustee (in such capacity, the "Trustee").

         On the date  hereof,  (i) the  Grantor has issued  $50,000,000  12 1/2%
Guaranteed  Senior  Secured  Notes Due 2004 (the  "Notes")  to  various  Initial
Purchasers (as defined in the Indenture) and such Initial Purchasers have agreed
to resell the Notes to various Holders thereof and (ii) the Guarantor has agreed
to guarantee the Notes on a senior unsecured  basis,  each pursuant to, and upon
the terms and  subject  to the  conditions  specified  in,  the  Indenture.  The
Indenture  requires,  among other  things,  the  execution  and  delivery by the
Grantor of an  agreement  in the form hereof to secure (a) the due and  punctual
payment by the Grantor of (i) the principal of and premium, if any, and interest
(including interest accruing during the pendency of any bankruptcy,  insolvency,
receivership  or other  similar  proceeding,  regardless  of whether  allowed or
allowable  in  such  proceeding)  on the  Notes,  when  and as due,  whether  at
maturity,  by  acceleration,  upon  one or  more  dates  set for  redemption  or
otherwise,  (ii)  each  payment  required  to be made by any  obligor  under the
Indenture in respect of any Note, when and as due, including payments in respect
of  reimbursement  of disbursements  and interest  thereon,  and (iii) all other
monetary obligations,  including fees, costs, expenses and indemnities,  whether
primary, secondary,  direct, contingent,  fixed or otherwise (including monetary
obligations  incurred  during  the  pendency  of  any  bankruptcy,   insolvency,
receivership  or other  similar  proceeding,  regardless  of whether  allowed or
allowable in such  proceeding),  of any obligor to the Secured Parties under the
Indenture  and the  other  Security  Documents  and  (b)  the  due and  punctual
performance of all covenants,  agreements,  obligations  and  liabilities of the
obligors  under or pursuant to the  Indenture and the other  Security  Documents
(all the monetary and other  obligations  described in the preceding clauses (a)
and (b) being collectively called the "Obligations").

         Accordingly, the Grantor, the Collateral Agent, on behalf of itself and
each Secured Party, and each of their respective  successors or assigns,  hereby
agree as follows:



<PAGE>


                                                                           2


                                    ARTICLE I

                                   Definitions

         SECTION  1.01.  Definition  of Terms Used  Herein.  Unless the  context
otherwise requires, all capitalized terms used but not defined herein shall have
the meanings set forth in the Indenture.

     SECTION 1.02.  Definition of Certain Terms Used Herein. As used herein, the
following terms shall have the following meanings:


         "Collateral"  shall mean (i) all Designated  Equipment  acquired by the
Grantor pursuant to Section 4.21 of the Indenture; (ii) the Proceeds of any sale
or other disposition  (other than leases in the ordinary course of business,  as
provided in Section 5.01(a) hereof) of such Designated  Equipment (including any
insurance  proceeds from the loss or destruction of such Designated  Equipment);
and (iii) any additional  Designated  Equipment acquired by the Grantor with the
Proceeds of any such sale or other disposition of Designated Equipment.

         "Designated Equipment" shall mean (i)  telecommunications  switches and
related equipment and inventory; (ii) customer premise equipment;  (iii) radios,
antennae  and  cabling;  (iv)  office  and  warehouse  furniture,  fixtures  and
equipment   (including   without   limitation,   computers  and   communications
equipment);  (v) company service vehicles;  and (vi) software related to each of
the  foregoing,  in each case  used in the  telecommunications  business  of the
Guarantor and its subsidiaries.

     "Indenture" shall have the meaning assigned to such term in the preliminary
statement of this Agreement.

         "Holder"  shall mean the person in whose name a Note is  registered  on
the books of the registrar.

     "Obligations"  shall  have  the  meaning  assigned  to  such  term  in  the
preliminary statement of this Agreement.

         "Proceeds"  shall  mean  any  consideration  received  from  the  sale,
exchange,  license,  lease (other than  consideration  received  solely from the
lease of  Designated  Equipment  in the  ordinary  course of  business) or other
disposition  of any asset or property  that  constitutes  Collateral,  any value
received as a consequence  of the  possession of any  Collateral and any payment
received  from any  insurer  or  other  person  or  entity  as a  result  of the
destruction,  loss, theft,  damage or other  involuntary  conversion of whatever
nature of any asset or property that


<PAGE>


                                                                          3

constitutes  Collateral,  and shall include all cash and negotiable  instruments
received or held on behalf of the Collateral Agent and any and all other amounts
from  time to time  paid or  payable  under  or in  connection  with  any of the
Collateral.

         "Secured Parties" shall mean (a) the Holders,  (b) the Trustee, (c) the
Collateral  Agent,  (d) the  beneficiaries  of each  indemnification  obligation
undertaken  by the Grantor  under any Security  Document  and (e) the  permitted
successors and assigns of each of the foregoing.

     "Security Interest" shall have the meaning assigned to such term in Section
2.01.

         "Status Certificate" shall mean a certificate substantially in the form
of Annex 1,  completed  and  supplemented  with the  schedules  and  attachments
contemplated  thereby,  and  duly  executed  by two  executive  officers  of the
Grantor.

     SECTION 1.03. Rules of Construction. The rules of construction specified in
Section 1.03 of the Indenture shall be applicable to this Agreement.


                                   ARTICLE II

                                Security Interest

         SECTION  2.01.  Security  Interest.  As  security  for the  payment  or
performance, as the case may be, in full of the Obligations,  the Grantor hereby
bargains,  sells,  conveys,  assigns,  sets  over,  pledges,   hypothecates  and
transfers to the Collateral  Agent, its successors and assigns,  for the ratable
benefit of the Secured Parties,  and hereby grants to the Collateral  Agent, its
successors  and  assigns,  for the  ratable  benefit of the Secured  Parties,  a
security  interest in all of the Grantor's right,  title and interest in, to and
under the Collateral (the "Security Interest").  In furtherance of such Security
Interest,  and pursuant to Sections 4.22 and 4.23 of the Indenture,  the Grantor
has filed (or, if not filed on or prior to the date  hereof,  will file no later
than  August  14,  1997)  fully  executed  Uniform   Commercial  Code  financing
statements  with the  Secretary of State of all 50 states of the United  States,
or,  where a state does not  provide  for  filing  with the  Secretary  of State
thereof,  in another  appropriate  filing  office,  as more fully  described  in
Section 3.02 hereof.  Without limiting the foregoing,  the Collateral Agent also
is hereby  authorized  to file one or more  financing  statements,  continuation
statements  or  other  documents  for the  purpose  of  perfecting,  confirming,
continuing,  enforcing  or  protecting  the  Security  Interest  granted  by the
Grantor,  without the signature of the Grantor, naming the Grantor as debtor and
the Collateral  Agent as secured party.  The Collateral  Agent shall furnish the
Grantor with copies of any such statements and other documents so filed.



<PAGE>


                                                                          4

         SECTION 2.02. No  Assumption  of  Liability.  The Security  Interest is
granted as security only and shall not subject the Collateral Agent or any other
Secured Party to, or in any way alter or modify,  any obligation or liability of
the Grantor with respect to or arising out of the Collateral.

                                   ARTICLE III

                         Representations and Warranties

         The Grantor  represents  and warrants to the  Collateral  Agent and the
Holders that:

         SECTION  3.01.  Title and  Authority.  The  Grantor  has good and valid
rights in and title to the Collateral  that it has purported to grant a Security
Interest  in  hereunder  and has  full  power  and  authority  to  grant  to the
Collateral Agent the Security Interest in such Collateral pursuant hereto and to
execute,  deliver and perform its  obligations  in accordance  with the terms of
this  Agreement,  without the consent or approval of any other person other than
any consent or approval which has been obtained.

         SECTION 3.02.  Filings.  The Status Certificate has been duly prepared,
completed  and executed  and the  information  set forth  therein is correct and
complete.  Fully executed Uniform Commercial Code financing statements (UCC-1's)
or  other  appropriate  filings,   recordings  or  registrations   containing  a
description of the  Collateral  have been filed (or, if not filed on or prior to
the date hereof, will be filed no later than August 14, 1997) with the Secretary
of State or other  appropriate  office of all 50 states of the United States and
in such other governmental, municipal or other office specified in Schedule 5 to
each Status Certificate (with copies delivered to the Collateral Agent).

         SECTION  3.03.  Validity of Security  Interest.  The Security  Interest
constitutes a legal and valid security  interest in all the Collateral  securing
the payment and  performance  of the  Obligations,  subject to any  requirements
regarding attachment.  The Security Interest in the Collateral will be perfected
only to the extent that the filings  referred to in Section 3.02 are  sufficient
to perfect such Security  Interest.  The Security Interest is prior to any other
Lien on any of the Collateral on the date hereof.

         SECTION 3.04.  Absence of Other Liens.  The  Collateral is owned by the
Grantor  free and clear of any Lien.  The Grantor has not filed or  consented to
the filing of any financing  statement or analogous  document  under the Uniform
Commercial  Code or any other  applicable laws covering any Collateral and which
financing  statement  or analogous  document is still in effect,  except for the
Liens and financing  statements expressly created or permitted by this Agreement
or the Indenture.




<PAGE>


                                                                          5

                                   ARTICLE IV

                                    Covenants

         SECTION 4.01. Change of Name; Location of Collateral; Records; Place of
Business.  (a) The Grantor agrees promptly to notify the Collateral Agent of any
change (i) in its corporate name or in any trade name used to identify it in the
conduct of its  business  or in the  ownership  of its  properties,  (ii) in the
location of its chief executive  office,  its principal  place of business,  any
office in which it maintains books or records relating to Collateral owned by it
or any office or facility at which Collateral owned by it is located  (including
the establishment of any such new office or facility),  (iii) in its identity or
corporate structure or (iv) in its Federal Taxpayer  Identification  Number. The
Grantor agrees to notify the Collateral  Agent, as soon as practicable  after an
executive officer of the Grantor learns thereof,  if any material portion of the
Collateral owned or held by the Grantor is damaged or destroyed.

         (b) The Grantor agrees to maintain,  at its own cost and expense,  such
complete and accurate records with respect to the Collateral owned or held by it
as is consistent with its current  practices and in accordance with such prudent
and standard  practices  used in  industries  that are the same as or similar to
those in which the  Grantor is  engaged,  but in any event to  include  complete
accounting records indicating all payments and proceeds received with respect to
any part of the Collateral,  and, at such time or times as the Collateral  Agent
may reasonably request,  promptly to prepare and deliver to the Collateral Agent
a  duly  certified   schedule  or  schedules  in  form  and  detail   reasonably
satisfactory to the Collateral  Agent showing the identity,  amount and location
of any and all Collateral.

     SECTION 4.02.  Protection of Security.  The Grantor shall,  at its own cost
and expense,  take any and all actions  reasonably  necessary to defend title to
the Collateral against all persons.

         SECTION  4.03.  Continuation  Statements.  The Grantor  agrees,  at its
expense,  to execute,  acknowledge,  deliver and cause to be duly filed all such
continuation  statements  on Form UCC-3 as to maintain  in effect the  financing
statements  filed  pursuant to Section 3.02, and to take all such actions as the
Collateral  Agent may from  time to time  reasonably  request  to  preserve  the
Security  Interest,  including  the  payment of any fees and taxes  required  in
connection  with the execution and delivery of this  Agreement,  the granting of
the  Security  Interest  and the  filing of any  financing  statements  or other
documents in connection herewith.

         SECTION 4.04.  Inspection and  Verification.  The Collateral  Agent and
such persons as the  Collateral  Agent may reasonably  designate  shall have the
right,  at the Grantor's own cost and expense,  to inspect the  Collateral,  all
records  related thereto (and to make extracts and copies from such records) and
the premises upon which any of the Collateral is located, where such premises is
within the control of the Grantor or any affiliate of the Grantor, to


<PAGE>


                                                                          6

discuss  the  Grantor's  affairs  with  the  officers  of the  Grantor  and  its
independent  accountants and to verify under reasonable procedures the validity,
amount, quality,  quantity,  value, condition and status of, or any other matter
relating  to,  the  Collateral,  including,  in the  case of  Collateral  in the
possession of any third person,  by contacting the third party  possessing  such
Collateral  (after two days'  notice to the  Grantor)  for the purpose of making
such a  verification.  Where the premises  upon which any of the  Collateral  is
located  are not within the control of the  Grantor,  Grantor  shall  reasonably
request such person(s)  controlling  such premises to allow the Collateral Agent
and its designees to inspect such premises for the purposes,  and subject to the
limitations,  of the foregoing  sentence.  The  Collateral  Agent shall have the
absolute  right to share  any  information  it gains  from  such  inspection  or
verification with any Secured Party.

         SECTION 4.05. Taxes; Encumbrances. At its option, upon not less than 10
days' prior written notice to the Grantor,  the  Collateral  Agent may discharge
past due taxes,  assessments,  charges, fees, liens, security interests or other
encumbrances  at any time levied or placed on the  Collateral  and not permitted
under the Indenture,  and may pay for the  maintenance  and  preservation of the
Collateral to the extent the Grantor fails to do so as required by the Indenture
or this Agreement,  and the Grantor agrees to reimburse the Collateral  Agent on
demand for any reasonable  payment or other expenses  incurred by the Collateral
Agent pursuant to the foregoing authorization;  provided,  however, that nothing
in  this  Section  shall  be  interpreted  as  excusing  the  Grantor  from  the
performance  of, or  imposing  any  obligation  on the  Collateral  Agent or any
Secured Party to cure or perform, any covenants or other promises of the Grantor
with respect to taxes, assessments,  charges, fees, liens, security interests or
other  encumbrances and maintenance as set forth herein or in the other Security
Documents.

         SECTION 4.06. Continuing  Obligations of the Grantor. The Grantor shall
remain liable to observe and perform all the  conditions  and  obligations to be
observed  and  performed  by it under each  contract,  agreement  or  instrument
relating to the Collateral,  including  Sections 4.22 and 4.23 of the Indenture,
all in accordance with the terms and conditions thereof,  and the Grantor agrees
to indemnify and hold harmless the Collateral Agent and the Secured Parties from
and against any and all liability for such performance.

     SECTION  4.07.  Insurance.  (a)  The  Grantor,  at its own  expense,  shall
maintain or cause to be maintained insurance covering physical loss or damage to
the Designated  Equipment,  including  without  limitation  such insurance as is
required pursuant to Section 4.15 of the Indenture.

         (b) In the event that the  Grantor  at any time or times  shall fail to
obtain or maintain any of the policies of  insurance  required  hereby or to pay
any premium in whole or part relating thereto, the Collateral Agent may, without
waiving or releasing any obligation or liability of the Grantor hereunder or any
Event of Default, in its sole discretion, obtain and


<PAGE>


                                                                          7

maintain  such  policies of  insurance  and pay such  premium and take any other
actions with respect thereto as the Collateral Agent deems  advisable.  All sums
disbursed by the  Collateral  Agent in connection  with this Section,  including
reasonable  attorneys'  fees,  court costs,  expenses and other charges relating
thereto,  shall be payable,  upon demand, by the Grantor to the Collateral Agent
and shall be additional Obligations secured hereby.

         SECTION 4.08.  Posting of Notices.  The Grantor shall,  with respect to
any telecommunications  switch that constitutes Designated Equipment acquired by
the Grantor  pursuant to Section 4.21 of the Indenture,  post a notice on, or in
the location housing, such telecommunications switch, identifying the Grantor as
the   owner  of  the   telecommunications   switch   and   stating   that   such
telecommunication switch is subject to the Security Interest under the Indenture
and the Security Documents.

         SECTION 4.09. FCC Approvals.  Notwithstanding  anything to the contrary
set forth  herein,  the Grantor  agrees that to the extent prior FCC approval is
required  pursuant to the  Communications  Act of 1934, as amended,  for (i) the
operation and effectiveness of any grant, right or remedy hereunder or under the
Indenture  or (ii) taking any action that may be taken by the  Collateral  Agent
hereunder or under the Indenture,  such grant,  right, remedy or actions will be
subject to such prior Federal Communications  Commission ("FCC") approval having
been obtained by or in favor of the Collateral  Agent,  on behalf of the Secured
Parties (and  Grantor  will use its best efforts to obtain any such  approval as
promptly as possible).  Grantor agrees that,  upon and during the continuance of
an Event of Default and at Collateral  Agent's  request,  Grantor will, and will
cause  its  subsidiaries  to,  immediately  file,  or  cause to be  filed,  such
applications  for approval and shall take all other and further actions required
by the  Collateral  Agent,  on behalf of the  Secured  Parties,  to obtain  such
governmental authorizations,  including FCC authorizations,  as are necessary to
transfer ownership and control to the Collateral Agent, on behalf of the Secured
Parties,  or their  successors or assigns,  of the Collateral  held by it or its
subsidiaries, or its interest in any Person holding any such Collateral.

         SECTION 4.10. UCC-1 Filings. The Grantor shall, and the Guarantor shall
cause the  Grantor  to, on or prior to August 14,  1997,  file  UCC-1's or other
appropriate filings, recordings or registrations containing a description of the
Collateral with the Secretary of State or other appropriate office in all states
of the United States (and in such other governmental,  municipal or other office
specified  in  Schedule 5 to each  Status  Certificate)  where the  Grantor  has
heretofore not filed the UCC-1's  required to be filed pursuant to Sections 4.22
and 4.23 of the Indenture.




<PAGE>


                                                                          8

                                    ARTICLE V

                        Transfer and Sales of Collateral

         SECTION 5.01. Transfer and Sales of Collateral.  (a) Grantor shall not,
except as  permitted by the terms of the  Indenture  from time to time in effect
(including  without  limitation  Sections 4.11, 4.23 and 11.02  thereof),  sell,
assign (by  operation of law or  otherwise)  or otherwise  dispose of any of the
Collateral.  For the avoidance of doubt,  Grantor may lease Designated Equipment
in the  ordinary  course of business  without  such lease  constituting  a sale,
assignment or other disposition  prohibited by the preceding  sentence,  and any
consideration  received  by Grantor  in  respect of any such lease  shall not be
subject to a security interest under the Security Documents.

         (b)  As  long  as no  Event  of  Default  shall  have  occurred  and be
continuing,  and no event which,  with the lapse of time or after notice,  would
become an Event of Default shall have occurred and be continuing,  Grantor shall
be entitled from time to time to request the Collateral  Agent to release all or
a portion of the Collateral owned by it and subject to this Agreement; provided,
however,  that such request must be in writing and  accompanied  by an Officers'
Certificate of Grantor and an Opinion of Counsel to Grantor (which counsel shall
be reasonably  satisfactory to the Collateral Agent) stating that all conditions
precedent to the release of such  Collateral  pursuant to this Article V and the
Indenture have been complied with.  Upon  satisfaction of the conditions in this
Article V and the Indenture,  the Lien of this Agreement on all Collateral to be
released  without any further action on the part of the Collateral  Agent or any
other person.  In  furtherance  of the  foregoing,  the  Collateral  Agent shall
execute and deliver to Grantor an instrument or  instruments  acknowledging  the
release of such  Collateral from this Agreement and the discharge of the Lien on
such Collateral  created by this Agreement,  and will duly assign,  transfer and
deliver to Grantor (without recourse and without any representation or warranty)
such Collateral to be released.

         (c) No  Collateral  shall be released  from the Lien of this  Agreement
pursuant to any request  described in paragraph (b) above unless (i) as promptly
as is practicable  thereafter,  the Grantor shall sell such Collateral,  (ii) as
promptly as is practicable thereafter,  the Grantor deposits with the Collateral
Agent cash or cash equivalents,  if any, representing the Net Cash Proceeds from
the sale of such Collateral;  and (iii) Grantor delivers to the Collateral Agent
an  Officers'  Certificate  and an Opinion  of  Counsel  to the effect  that all
conditions  precedent contained in the Indenture to the sale and release of such
Collateral  shall have been  satisfied in full.  On or after deposit of the sums
described  in clause  (ii) of this  paragraph  (c),  Grantor  shall be  entitled
thereafter  to request  release of such cash  proceeds at such times and in such
amounts  in order to,  and only to the  extent  necessary  to,  comply  with its
obligations  under,  or otherwise in accordance  with, the Indenture,  including
without limitation,  its obligation to acquire additional  Designated  Equipment
within 45 days pursuant to Section 4.11 thereof,  as a result of the disposition
of such Collateral. Such releases of Net Cash Proceeds shall not be


<PAGE>


                                                                          9

made until and unless Grantor shall have delivered an Officers'  Certificate and
an Opinion  of  Counsel to the  Collateral  Agent  stating  that all  conditions
precedent to such release set forth in the Indenture shall have been satisfied.

         (d) The  release  of any  Collateral  from the terms  hereof and of the
other  Security  Documents  or the  release  of, in whole or in part,  the Liens
created by the Security Documents,  will not be deemed to impair the Lien on the
Collateral  in  contravention  of the  provisions of the Indenture if and to the
extent the Collateral or Liens are released pursuant to the applicable  Security
Documents  and  pursuant  to the  terms of the  Indenture.  Each of the  Secured
Parties acknowledge that a release of Collateral strictly in accordance with the
terms of the Security  Documents and of the Indenture will not be deemed for any
purpose to be an impairment of the Lien on the  Collateral in  contravention  of
the terms of the Indenture.  To the extent applicable,  Grantor and each obligor
on the Securities shall cause ss. 314(d) of the Trust Indenture Act of 1939 (the
"TIA")  relating to the release of property or  securities  from the Lien of the
Security  Documents and of the Indenture to be complied with. Any certificate or
opinion  required by ss. 314(d) of the TIA may be made by an officer of Grantor,
except in cases which ss.  314(d) of the TIA required that such  certificate  or
opinion be made by an independent person.


                                   ARTICLE VI

                                Power of Attorney

         SECTION  6.01.  Power  of  Attorney.  The  Grantor  irrevocably  makes,
constitutes  and appoints the Collateral  Agent (and all officers,  employees or
agents  designated by the  Collateral  Agent) as the  Grantor's  true and lawful
agent and attorney-in-fact, and in such capacity the Collateral Agent shall have
the right,  with power of substitution for the Grantor and in the Grantor's name
or otherwise,  for the use and benefit of the  Collateral  Agent and the Secured
Parties,  upon the occurrence and during the  continuance of an Event of Default
(a) to receive,  endorse, assign and/or deliver any and all notes,  acceptances,
checks,  drafts,  money  orders or other  evidences  of payment  relating to the
Collateral or any part thereof; (b) to demand, collect, receive payment of, give
receipt for and give  discharges  and releases of all or any of the  Collateral;
(c) to sign the name of the Grantor on any invoice or bill of lading relating to
any of the Collateral;  (d) to commence and prosecute any and all suits, actions
or  proceedings  at law or in equity in any court of competent  jurisdiction  to
collect or otherwise  realize on all or any of the  Collateral or to enforce any
rights in respect of any Collateral; (e) to settle, compromise, compound, adjust
or  defend  any  actions,  suits or  proceedings  relating  to all or any of the
Collateral;  (f) to notify, or to require the Grantor to notify third parties to
make payment  directly to the Collateral  Agent;  and (g) to use, sell,  assign,
transfer,  pledge, make any agreement with respect to or otherwise deal with all
or any of the Collateral, and to do all other acts and things necessary to carry
out the purposes of this Agreement, as


<PAGE>


                                                                          10

fully and completely as though the  Collateral  Agent were the absolute owner of
the  Collateral  for  all  purposes;  provided,  however,  that  nothing  herein
contained shall be construed as requiring or obligating the Collateral  Agent or
any Secured Party to make any commitment or to make any inquiry as to the nature
or  sufficiency of any payment  received by the Collateral  Agent or any Secured
Party,  or to present or file any claim or  notice,  or to take any action  with
respect to the Collateral or any part thereof or the moneys due or to become due
in respect  thereof or any  property  covered  thereby,  and no action  taken or
omitted to be taken by the Collateral Agent or any Secured Party with respect to
the Collateral or any part thereof shall give rise to any defense,  counterclaim
or  offset  in favor  of the  Grantor  or to any  claim or  action  against  the
Collateral  Agent or any Secured  Party.  It is  understood  and agreed that the
appointment of the  Collateral  Agent as the agent and  attorney-in-fact  of the
Grantor  for the  purposes  set forth above is coupled  with an interest  and is
irrevocable.  The  provisions  of this  Section  shall in no event  relieve  the
Grantor of any of its obligations  hereunder or under the Indenture with respect
to the Collateral or any part thereof or impose any obligation on the Collateral
Agent or any Secured Party to proceed in any  particular  manner with respect to
the  Collateral  or any part  thereof,  or in any way limit the  exercise by the
Collateral Agent or any Secured Party of any other or further right which it may
have on the date of this Agreement or hereafter,  whether  hereunder,  under any
other Security Document, by law or otherwise.


                                   ARTICLE VII

                                    Remedies

         SECTION 7.01. Remedies upon Default. Upon the occurrence and during the
continuance  of an Event of Default,  the Grantor agrees to deliver each item of
Collateral  to the  Collateral  Agent  on  demand,  and it is  agreed  that  the
Collateral Agent shall have the right (subject to applicable law) to take any of
or all the  following  actions at the same or different  times:  with or without
legal process and with or without previous notice or demand for performance,  to
take  possession of the Collateral  and without  liability for trespass to enter
any  premises  where the  Collateral  may be located  for the  purpose of taking
possession of or removing the Collateral and, generally, to exercise any and all
rights  afforded to a secured party under the Uniform  Commercial  Code or other
applicable law.  Without  limiting the generality of the foregoing,  the Grantor
agrees that the Collateral Agent shall have the right,  subject to the mandatory
requirements of applicable law, to sell or otherwise  dispose of all or any part
of the  Collateral,  at public or private  sale,  for cash,  upon  credit or for
future  delivery  as the  Collateral  Agent  shall deem  appropriate.  Each such
purchaser at any such sale shall hold the property  sold  absolutely,  free from
any claim or right on the part of the Grantor, and the Grantor hereby waives (to
the extent permitted by law) all rights of redemption,  stay and appraisal which
the  Grantor now has or may at any time in the future have under any rule of law
or statute now existing or hereafter enacted.



<PAGE>


                                                                          11

         The  Collateral  Agent shall give the Grantor 15 days'  written  notice
(which the Grantor  agrees is  reasonable  notice  within the meaning of Section
9-504(3) of the Uniform Commercial Code as in effect in the State of New York or
its equivalent in other  jurisdictions)  of the Collateral  Agent's intention to
make any sale of Collateral.  Such notice,  in the case of a public sale,  shall
state the time and place for such sale.  Any such  public  sale shall be held at
such time or times within ordinary business hours and at such place or places as
the  Collateral  Agent may fix and state in the notice (if any) of such sale. At
any such sale, the Collateral, or portion thereof, to be sold may be sold in one
lot as an entirety or in separate  parcels,  as the Collateral Agent may (in its
sole and  absolute  discretion)  determine.  The  Collateral  Agent shall not be
obligated to make any sale of any Collateral if it shall determine not to do so,
regardless  of the fact that notice of sale of such  Collateral  shall have been
given.  The Collateral  Agent may,  without notice or  publication,  adjourn any
public or private  sale or cause the same to be  adjourned  from time to time by
announcement  at the time and place fixed for sale,  and such sale may,  without
further  notice,  be made at the  time  and  place  to  which  the  same  was so
adjourned.  In case  any sale of all or any  part of the  Collateral  is made on
credit or for future  delivery,  the  Collateral  so sold may be retained by the
Collateral  Agent until the sale price is paid by the  purchaser  or  purchasers
thereof, but the Collateral Agent shall not incur any liability in case any such
purchaser or purchasers shall fail to take up and pay for the Collateral so sold
and, in case of any such failure,  such  Collateral  may be sold again upon like
notice. At any public sale made pursuant to this Section,  any Secured Party may
bid for or  purchase,  free (to the extent  permitted  by law) from any right of
redemption,  stay,  valuation  or appraisal on the part of the Grantor (all said
rights being also hereby  waived and  released to the extent  permitted by law),
the  Collateral  or any part  thereof  offered for sale and may make  payment on
account  thereof by using any claim then due and payable to such  Secured  Party
from the Grantor as a credit against the purchase price,  and such Secured Party
may, upon  compliance with the terms of sale,  hold,  retain and dispose of such
property without further  accountability to the Grantor  therefor.  For purposes
hereof,  a written  agreement to purchase the Collateral or any portion  thereof
shall be treated as a sale thereof;  the Collateral Agent shall be free to carry
out such sale  pursuant to such  agreement and the Grantor shall not be entitled
to the return of the Collateral or any portion thereof subject thereto, notwith-

standing the fact that after the  Collateral  Agent shall have entered into such
an agreement all Events of Default shall have been remedied and the  Obligations
paid in full. As an alternative to exercising the power of sale herein conferred
upon it, the Collateral Agent may proceed by a suit or suits at law or in equity
to foreclose this  Agreement and to sell the  Collateral or any portion  thereof
pursuant  to a  judgment  or  decree  of a  court  or  courts  having  competent
jurisdiction or pursuant to a proceeding by a court-appointed receiver.

     SECTION 7.02. Application of Proceeds. The Collateral Agent shall apply the
proceeds of any collection or sale of the Collateral,  as well as any Collateral
consisting of cash, as follows:

                  FIRST,  to the payment of all costs and  expenses  incurred by
         the Trustee or the Collateral  Agent (in its capacity as such hereunder
         or under any other Security


<PAGE>


                                                                          12

         Document) in  connection  with such  collection or sale or otherwise in
         connection with this Agreement or any of the Obligations, including all
         court  costs and the  reasonable  fees and  expenses  of its agents and
         legal  counsel,  the repayment of all advances  made by the  Collateral
         Agent  hereunder or under any other Security  Document on behalf of the
         Grantor and any other costs or expenses incurred in connection with the
         exercise of any right or remedy  hereunder or under any other  Security
         Document;

     SECOND,  to the payment of the fees and expenses of the Secured  Parties on
an equal and ratable basis;

     THIRD,  to the payment of interest on and fees, if any, with respect to the
Obligations on an equal and ratable basis;

     FOURTH, to the payment of the unpaid principal amount of the Obligations on
an equal and ratable basis;

     FIFTH,  to the payment of costs and  expenses  of, all premiums on, and all
other  amounts  due with  respect  to, the  Obligations  on an equal and ratable
basis; and

     SIXTH,  to the  Grantor,  its  successors  or  assigns,  or as a  court  of
competent jurisdiction may otherwise direct.

The  Collateral  Agent  shall  have  absolute  discretion  as  to  the  time  of
application  of any such  proceeds,  moneys or balances in accordance  with this
Agreement.  Upon any sale of the Collateral by the Collateral  Agent  (including
pursuant to a power of sale granted by statute or under a judicial  proceeding),
the receipt of the Collateral Agent or of the officer making the sale shall be a
sufficient  discharge to the purchaser or  purchasers of the  Collateral so sold
and  such  purchaser  or  purchasers  shall  not  be  obligated  to  see  to the
application of any part of the purchase money paid over to the Collateral  Agent
or such officer or be answerable in any way for the misapplication thereof.


                                  ARTICLE VIII

                                  Miscellaneous

     SECTION 8.01.  Notices.  All  communications  and notices  hereunder  shall
(except as  otherwise  expressly  permitted  herein) be in writing  and given as
provided in Section 12.02 of the Indenture.

     SECTION 8.02.  Security  Interest  Absolute.  All rights of the  Collateral
Agent  hereunder,  the  Security  Interest  and all  obligations  of the Grantor
hereunder  shall be absolute and  unconditional  irrespective of (a) any lack of
validity or enforceability of the Indenture or

<PAGE>


                                                                          13

any  other  Security  Document,  any  agreement  with  respect  to  any  of  the
Obligations  or  any  other  agreement  or  instrument  relating  to  any of the
foregoing,  (b) any change in the time, manner or place of payment of, or in any
other term of, all or any of the  Obligations,  or any other amendment or waiver
of or any  consent  to any  departure  from the  Indenture,  any other  Security
Document or any other agreement or instrument, (c) any exchange, release or non-
perfection  of any Lien on other  collateral,  or any  release or  amendment  or
waiver  of or  consent  under or  departure  from  any  guarantee,  securing  or
guaranteeing all or any of the Obligations,  or (d) any other circumstance which
might  otherwise  constitute  a defense  available  to, or a  discharge  of, the
Grantor in respect of the Obligations or this Agreement.

         SECTION  8.03.  Survival  of  Agreement.  All  covenants,   agreements,
representations   and  warranties   made  by  the  Grantor  herein  and  in  the
certificates  or other  instruments  prepared or delivered in connection with or
pursuant to this Agreement or any other Security Document shall be considered to
have been relied upon by the Holders,  regardless of any  investigation  made by
the  Holders or on their  behalf,  and shall  continue  in full force and effect
until this Agreement shall terminate.

         SECTION 8.04. Binding Effect;  Several Agreement.  This Agreement shall
become effective as to the Grantor when a counterpart  hereof executed on behalf
of the  Grantor  shall  have  been  delivered  to  the  Collateral  Agent  and a
counterpart  hereof shall have been executed on behalf of the Collateral  Agent,
and thereafter  shall be binding upon the Grantor and the  Collateral  Agent and
their respective  successors and assigns,  and shall inure to the benefit of the
Grantor, the Collateral Agent and the other Secured Parties and their respective
successors  and  assigns,  except that the  Grantor  shall not have the right to
assign its rights  hereunder or any interest herein or in the Collateral  except
as expressly contemplated by this Agreement or the Indenture.

         SECTION 8.05. Successors and Assigns. Whenever in this Agreement any of
the parties hereto is referred to, such reference shall be deemed to include the
successors and assigns of such party; and all covenants, promises and agreements
by or on behalf of the Grantor or the  Collateral  Agent that are  contained  in
this  Agreement  shall  bind  and  inure  to the  benefit  of  their  respective
successors and assigns.

         SECTION 8.06.  Collateral  Agent's Fees and Expenses;  Indemnification.
(a) The Grantor agrees to pay upon demand to the Collateral  Agent the amount of
any and all reasonable  expenses,  including the reasonable fees,  disbursements
and other  charges  of its  counsel  and of any  experts  or  agents,  which the
Collateral  Agent may incur in connection  with (i) the  administration  of this
Agreement  (including the customary fees of the Collateral Agent for any ongoing
monitoring or audits conducted by it with respect to the  Collateral),  (ii) the
custody or preservation of, or the sale of, collection from or other realization
upon any of the Collateral, (iii) the exercise, enforcement or protection of any
of the  rights of the  Collateral  Agent  hereunder  or (iv) the  failure of the
Grantor to perform or observe any of the provisions hereof.


<PAGE>


                                                                          14


         (b) Without  limitation of its  indemnification  obligations  under the
other Security Documents,  the Grantor jointly and severally agrees to indemnify
the Collateral Agent and the other Secured Parties (collectively, "Indemnitees")
against,  and hold  each of them  harmless  from,  any and all  losses,  claims,
damages,   liabilities  and  related   expenses,   including   reasonable  fees,
disbursements and other charges of counsel,  incurred by or asserted against any
of them  arising  out of, in any way  connected  with,  or as a result  of,  the
execution,  delivery or performance of this Agreement or any claim,  litigation,
investigation or proceeding relating hereto or to the Collateral, whether or not
any Indemnitee is a party thereto; provided that such indemnity shall not, as to
any Indemnitee,  be available to the extent that such losses,  claims,  damages,
liabilities  or  related  expenses  are  determined  by  a  court  of  competent
jurisdiction by final and nonappealable judgment to have resulted from the gross
negligence or willful misconduct of such Indemnitee.

         (c) Any such amounts payable as provided  hereunder shall be additional
Obligations  secured  hereby.  The  provisions  of  this  Section  shall  remain
operative  and in full force and effect  regardless of the  termination  of this
Agreement,  the  consummation  of  the  transactions  contemplated  hereby,  the
repayment of any of the Notes, the invalidity or unenforceability of any term or
provision of this Agreement or any other Security Document, or any investigation
made by or on behalf of the  Collateral  Agent or any  Holder.  All  amounts due
under this Section shall be payable on written demand therefor.

     SECTION 8.07.  GOVERNING LAW. THIS AGREEMENT  SHALL BE GOVERNED BY THE LAWS
OF THE STATE OF NEW YORK,  EXCLUDING (TO THE EXTENT PERMISSIBLE BY LAW) ANY RULE
OF LAW THAT WOULD CAUSE THE  APPLICATION OF THE LAWS OF ANY  JURISDICTION  OTHER
THAN THE STATE OF NEW YORK.

         SECTION  8.08.  Waivers;  Amendment.  (a) No  failure  or  delay of the
Collateral  Agent in exercising any power or right  hereunder shall operate as a
waiver  thereof,  nor shall any single or partial  exercise of any such right or
power, or any abandonment or  discontinuance of steps to enforce such a right or
power,  preclude  any other or further  exercise  thereof or the exercise of any
other right or power.  The rights and remedies of the Collateral Agent hereunder
and of the  Collateral  Agent,  the  Trustee  and the  Holders  under  the other
Security  Documents  are  cumulative  and are not  exclusive  of any  rights  or
remedies  which they would  otherwise  have. No waiver of any provisions of this
Agreement  or any other  Security  Document or consent to any  departure  by the
Grantor  therefrom  shall in any event be  effective  unless  the same  shall be
permitted  by  paragraph  (b) below,  and then such  waiver or consent  shall be
effective only in the specific  instance and for the purpose for which given. No
notice or demand on the  Grantor in any case shall  entitle  the  Grantor to any
other or further notice or demand in similar or other circumstances.

     (b) Neither this Agreement nor any provision hereof may be waived,  amended
or modified  except  pursuant to an agreement or agreements  in writing  entered
into by the

<PAGE>


                                                                          15

Collateral Agent and the Grantor with respect to which such waiver, amendment or
modification  is to apply,  subject to any consent  required in accordance  with
Section 9.02 of the Indenture.

         SECTION 8.09. WAIVER OF JURY TRIAL. EACH PARTY HERETO HEREBY WAIVES, TO
THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL
BY JURY IN RESPECT OF ANY  LITIGATION  DIRECTLY  OR  INDIRECTLY  ARISING OUT OF,
UNDER  OR IN  CONNECTION  WITH  THIS  AGREEMENT  OR ANY OF  THE  OTHER  SECURITY
DOCUMENTS.  EACH PARTY HERETO (A)  CERTIFIES  THAT NO  REPRESENTATIVE,  AGENT OR
ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED,  EXPRESSLY OR OTHERWISE,  THAT SUCH
OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
WAIVER  AND (B)  ACKNOWLEDGES  THAT IT AND THE OTHER  PARTIES  HERETO  HAVE BEEN
INDUCED  TO ENTER  INTO THIS  AGREEMENT  AND THE OTHER  SECURITY  DOCUMENTS,  AS
APPLICABLE,  BY, AMONG OTHER THINGS,  THE MUTUAL WAIVERS AND  CERTIFICATIONS  IN
THIS SECTION.

         SECTION  8.10.  Severability.  In the  event  any  one or  more  of the
provisions  contained in this Agreement or in any other Security Document should
be held invalid, illegal or unenforceable in any respect, the validity, legality
and  enforceability  of the remaining  provisions  contained  herein and therein
shall not in any way be affected or impaired thereby. The parties shall endeavor
in  good-faith  negotiations  to replace the invalid,  illegal or  unenforceable
provisions with valid  provisions the economic effect of which comes as close as
possible to that of the invalid, illegal or unenforceable provisions.

         SECTION  8.11.   Counterparts.   This  Agreement  may  be  executed  in
counterparts (and by different parties hereto on different  counterparts),  each
of which shall constitute an original but all of which when taken together shall
constitute a single contract,  and shall become effective as provided in Section
8.04.  Delivery of an executed  signature  page to this  Agreement  by facsimile
transmission  shall be as effective as delivery of a manually signed counterpart
of this Agreement.

         SECTION 8.12.  Headings.  Article and Section  headings used herein are
for the  convenience  of reference  only, are not part of this Agreement and are
not to  affect  the  construction  of,  or to be  taken  into  consideration  in
interpreting, this Agreement.

         SECTION  8.13.  Jurisdiction;  Consent to Service of  Process.  (a) The
Grantor  hereby  irrevocably  and  unconditionally  submits,  for itself and its
property,  to the  nonexclusive  jurisdiction  of any New  York  State  court or
Federal court of the United States of America  sitting in New York City, and any
appellate court from any thereof,  in any action or proceeding arising out of or
relating to this Agreement or the other Security  Documents,  or for recognition
or enforcement of any judgment, and each of the parties hereto hereby


<PAGE>


                                                                          16

irrevocably  and  unconditionally  agrees that all claims in respect of any such
action or proceeding  may be heard and  determined in such New York State or, to
the extent  permitted by law, in such Federal court.  Each of the parties hereto
agrees  that a  final  judgment  in any  such  action  or  proceeding  shall  be
conclusive and may be enforced in other jurisdictions by suit on the judgment or
in any other manner provided by law.  Nothing in this Agreement shall affect any
right that the Collateral Agent, the Trustee or any Holder may otherwise have to
bring any action or proceeding  relating to this Agreement or the other Security
Documents   against  the  Grantor  or  its  properties  in  the  courts  of  any
jurisdiction.

         (b) The Grantor hereby irrevocably and  unconditionally  waives, to the
fullest extent it may legally and  effectively do so, any objection which it may
now or hereafter  have to the laying of venue of any suit,  action or proceeding
arising out of or relating to this Agreement or the other Security  Documents in
any New  York  State  or  Federal  court.  Each  of the  parties  hereto  hereby
irrevocably  waives,  to the fullest extent  permitted by law, the defense of an
inconvenient  forum to the  maintenance of such action or proceeding in any such
court.

         (c) Each party to this  Agreement  irrevocably  consents  to service of
process by registered  mail,  postage  prepaid.  Nothing in this  Agreement will
affect the right of any party to this  Agreement  to serve  process in any other
manner permitted by law.

     SECTION  8.14.  Termination  or Release.  (a) Except as provided in Section
8.06,  this  Agreement and the Security  Interest  shall  terminate when all the
Obligations  have  been  indefeasibly  paid in  full  and  the  Grantor  and the
Guarantor have no further obligations to the Holders.

         (b) In connection with any termination pursuant to paragraph (a) above,
upon the request of the Grantor  accompanied  by an  Officers'  Certificate  and
Opinion of Counsel  stating that all conditions  precedent to the termination of
the Lien in the  Collateral  pursuant to this  Agreement and the Indenture  have
been satisfied,  the Collateral  Agent shall execute and deliver to the Grantor,
at the Grantor's expense, all Uniform Commercial Code termination


<PAGE>


                                                                          17

statements and similar  documents which the Grantor shall reasonably  request to
evidence such termination.  Any execution and delivery of termination statements
or  documents  pursuant  to this  Section  8.14 shall be without  recourse to or
warranty by the Collateral Agent.


     IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as
of the day and year first above written.


                                       WINSTAR EQUIPMENT II CORP., as
                                         Grantor,

                                       By:
                                          ---------------------------
                                          Name:
                                          Title:


                                       UNITED STATES TRUST
                                       COMPANY OF NEW YORK,
                                         as Collateral Agent,

                                       By:
                                          ---------------------------
                                          Name:
                                          Title:




<PAGE>



                                                           Annex 1 to the
                                                         Security Agreement



                                    [Form of]

                               STATUS CERTIFICATE


         Reference  is made to the  Indenture  dated as of  August  1,  1997 (as
amended, supplemented or otherwise modified from time to time, the "Indenture"),
among WINSTAR  EQUIPMENT II CORP., a Delaware  corporation  ("WinStar  Equipment
II"), WINSTAR  COMMUNICATIONS,  INC., a Delaware  corporation (the "Guarantor"),
UNITED STATES TRUST COMPANY OF NEW YORK, as trustee (the "Trustee"),  and to the
Security  Agreement dated August 1, 1997 (as amended,  supplemented or otherwise
modified from time to time, the "Security  Agreement"),  among WinStar Equipment
II, as  grantor  (the  "Grantor"),  and the  Trustee  as  collateral  agent (the
"Collateral Agent").  Capitalized terms used herein and not defined herein shall
have the meanings assigned to such terms in the Indenture.

         Under the Security  Agreement,  WinStar  Equipment II is the Grantor of
security interests in the Collateral as defined therein.  In order to facilitate
the perfection of such security  interests,  the Collateral  Agent has requested
that WinStar Equipment II provide the information  specified in this certificate
for the Grantor.

     The undersigned,  executive officers of the Grantor,  hereby certify to the
Collateral Agent and each other Secured Party as follows:

     1. Names. (a) The exact corporate name of the Grantor, as such name appears
in its certificate of incorporation, is as follows:

     (b) Set forth below is each other corporate name the Grantor has had in the
past five years, together with the date of the relevant change:

     (c) Except as set forth in  Schedule 1 hereto,  the Grantor has not changed
its  identity  or  corporate  structure  in any way within the past five  years.
Changes in identity or corporate structure would include mergers, consolidations
and  acquisitions,  as well as any change in the form, nature or jurisdiction of
corporate organization.  If any such change has occurred,  include in Schedule 1
the  information  required  by Sections 1 and 2 of this  certificate  as to each
acquiree or constituent party to a merger or consolidation.

     (d) The  following is a list of all other names  (including  trade names or
similar  appellations)  used by the  Grantor  or any of its  divisions  or other
business  units in connection  with the conduct of its business or the ownership
of its properties at any time during the past five years:

     (e) Set forth below is the Federal  Taxpayer  Identification  Number of the
Grantor: 13-3960835.


<PAGE>


                                                                          2


     2.  Current  Locations.  (a) The chief  executive  office of the Grantor is
located at the address set forth on Schedule 2(a) hereto.

         (b) Set forth on  Schedule  2(b)  hereto  are all  locations  where the
Grantor maintains (or intends to maintain) Collateral having an Acquired Cost of
at least $25,000 in such location.

         (c) Set forth on  Schedule  2(c)  hereto are all the  places  where the
Grantor maintains an office or other facility not identified in paragraph (a) or
(b) above.

     3. Unusual Transactions. All Designated Equipment has been purchased by the
Grantor in the ordinary course of its business.

     4.  UCC  Filings.  Duly  signed  financing  statements  on  Form  UCC-1  in
substantially  the form of Schedule 4 hereto have been  prepared for filing with
the Secretary of State or other  appropriate  office of the states of the United
States listed in Schedule 5.

     5. Schedule of Filings. Attached hereto as Schedule 5 is a schedule setting
forth, with respect to the filings described in Section 4 above, each filing and
the filing office in which such filing is to be made.

     6. Filing Fees.  All filing fees and taxes payable in  connection  with the
filings described in Section 4 above have been paid.


     IN WITNESS  WHEREOF,  the undersigned has duly executed this certificate on
this _____ day of ________________, 199_.

                                       WINSTAR EQUIPMENT II CORP.,

                                       By:
                                          ---------------------------
                                          Name:
                                          Title:


                                       By:
                                          ---------------------------
                                          Name:
                                          Title:





<PAGE>



                                                                    SCHEDULE 1





                                     CHANGES







<PAGE>



                                                               SCHEDULE 2(a)





                             CHIEF EXECUTIVE OFFICE














<PAGE>



                                                                SCHEDULE 2(b)





                             LOCATIONS OF COLLATERAL





<PAGE>



                                                               SCHEDULE 2(c)





                          OFFICES AND OTHER FACILITIES












<PAGE>



                                                                   SCHEDULE 4





                                   FORM UCC-1





<PAGE>


                                                                   SCHEDULE 5





                                  UCC-1 FILINGS





<PAGE>


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