WINSTAR COMMUNICATIONS INC
8-K, 1997-02-14
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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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)          February 10, 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) 687-7577



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





                              Exhibit Index -- Page 5

                                 Page 1 of Pages



                                                   


<PAGE>



Item 5.           Other Events.

         On February 6, 1997, WinStar Communications,  Inc. and its wholly owned
subsidiary   WinStar   Credit   Corp.   ("WCC"  and,   together   with   WinStar
Communications,   Inc.,  the  "Company")  entered  into  a  Securities  Purchase
Agreement ("Securities Purchase Agreement") with certain purchasers, pursuant to
which the Company  agreed to sell to such  purchasers  an aggregate of 4,000,000
shares of the  Company's  6% Series A  Cumulative  Convertible  Preferred  Stock
("Preferred  Shares") and warrants to purchase 1,600,000 shares of the Company's
common  stock  ("Warrants"  and,   together  with  the  Preferred  Shares,   the
"Securities") for an aggregate  purchase price of $100 million.  The sale of the
Securities was  consummated on February 11, 1997. The sale of the Securities was
conducted as an institutional  private  placement  ("Preferred Stock Placement")
through Credit Suisse First Boston  Corporation,  which acted as placement agent
and received fees equal to 4% of the aggregate  purchase price of the Securities
for  acting in this  capacity.  The  principal  purpose of the  Preferred  Stock
Placement  was to  raise  proceeds  to  fund  the  expansion  of  the  Company's
telecommunications and other operations.

         Each  Preferred  Share has a stated value of $25  ("Stated  Value") and
entitles the holder thereof to receive from the Company  dividends at a rate per
annum equal to 6% of the Stated Value.  Dividends accrue and are cumulative from
the date of issuance  and are payable in arrears  quarterly as of March 31, June
30,  September  30 and  December  31 of each year to the  record  holders of the
Preferred  Shares  as of  March  15,  June 15,  September  15 and  December  15,
respectively, of each year. The Company may pay such dividends in either cash or
through the issuance of additional Preferred Shares, at its election.

         The  Preferred  Shares  are  convertible  into  shares of Common  Stock
commencing  August  11,  1997 by  dividing  the  aggregate  Stated  Value of the
Preferred Shares being converted by the "Conversion  Price;" provided,  however,
that from August 11, 1997 through  November 10, 1997,  only 50% of the Preferred
Shares may be converted.  Subject to certain adjustments, the "Conversion Price"
will be: (i) with respect to any conversion of Preferred  Shares occurring prior
to February 11,  1998,  the lesser of (x) $25 and (y) the average of the closing
bid prices for the Company's  common stock for the 20  consecutive  trading days
immediately  preceding  the date of  conversion,  and (ii) with  respect  to any
conversion  of Preferred  Shares  occurring on or after  February 11, 1998,  the
lesser of (x) $25 and (y) the  average  of the  closing  bid  prices  for the 20
consecutive   trading   days   immediately    preceding   February   11,   1998.
Notwithstanding  the  foregoing,   if  a  holder  of  Preferred  Stock  requests
conversion  at a time when the  Conversion  Price is less than $15.00,  then the
Company may (subject to certain notice requirements), in lieu of converting such
shares of Preferred Stock into shares of Common Stock,  pay such holder in cash,
an amount equal to 110% of the Liquidation  Preference (as defined  below),  for
each share of Preferred  Stock  requested to be converted.  On February 11, 2002
("Mandatory  Conversion  Date"), any Preferred Shares still outstanding shall be
automatically  converted into shares of the Company's  common stock,  unless the
Company  deermines to pay cash therefor,  in an amount equal to the Stated Value
thereof,  plus all  accrued  and  unpaid  dividends  thereon  (the  "Liquidation
Preference").  Unless  paid  for in  cash,  such  mandatory  conversion  will be
effected by delivery of shares of Common Stock to the holders of Preferred Stock
having a value,  based upon the closing bid prices for the Common  Stock for the
20  consecutive  trading  days ending one  trading day prior to such  conversion
date, equal to the Liquidation Preference.

         The  Warrants  entitle the holders  thereof to purchase an aggregate of
1,600,000  shares of the  Company's  common  stock for $25 per share at any time
commencing  February  11, 1998 and ending  February  11,  2002.  The Company may
accelerate  the  expiration  date at any time  after  February  11,  2000 if the
Company's  Common  Stock  trades at $40 or more for a period  of 20  consecutive
days.




                                                   

<PAGE>



         The Company and the purchasers also entered into a Registration  Rights
Agreement, dated February 6, 1997, pursuant to which the Company is obligated to
file a registration  statement under the Securities Act of 1933, as amended (the
"Act"), registering the (i) resale of the Preferred Shares and Warrants and (ii)
the issuance by the Company of the shares of Common  Stock upon  exercise of the
Warrants,  and to have such  registration  statement  declared  effective by the
Securities  and Exchange  Commission  ("SEC") on or prior to August 15, 1997. If
such registration  statement is not declared  effective by the SEC by August 15,
1997, the dividend rate of the Preferred Shares shall increase to 6.5% per annum
until  the  default   under  the   Registration   Rights   Agreement  is  cured.
Additionally, under the Registration Rights Agreement, at any time after May 11,
1997,  each holder of the Preferred  Shares may demand that the Company file and
have declared  effective within 90 days of such demand a registration  statement
registering the resale of the shares of Common Stock issuable upon conversion of
the Preferred Shares by the holders thereof;  provided that the Company will not
be  required  to file more than two such  registration  statements.  If any such
latter  registration  statement is not declared  effective by the SEC within the
applicable 90-day period,  the Company will be required to pay to the holders of
the Preferred Stock who gave the demand an amount equal to 2% of the Liquidation
Preference of their Preferred  Shares for each month until the default under the
Registration  Rights  Agreement  is cured.  Such  penalty  is payable in cash or
additional shares of Preferred Stock, at the Company's election.

         On February 10, 1997, the Company issued a press release announcing the
execution of the Securities Purchase Agreement and the transactions contemplated
thereby. A copy of such press is annexed hereto as an exhibit.





<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: February 14, 1997                         WINSTAR COMMUNICATIONS, INC.
                                                       (Registrant)


                                                 By:  /s/ Timothy R. Graham
                                                    --------------------------
                                                        Timothy R. Graham
                                                     Executive Vice President




<PAGE>


                                  EXHIBIT INDEX


Exhibit Number           Description

       2.7               Securities Purchase Agreement

       3.6               Certificate of Elimination of Series A,B,C,D,E 
                         Preferred Stock

       3.7               Certificate of Designations, Rights and Preferences of
                         6% Series A Cumulative Convertible Preferred Stock

       4.9               Form of Series A Preferred Stock Certificate

      4.10               Form of Warrant

     10.85               Registration Rights Agreement




<PAGE>




                          SECURITIES PURCHASE AGREEMENT

                  SECURITIES PURCHASE AGREEMENT (this "Agreement"),  dated as of
February  6,  1997,  by and  among  WinStar  Communications,  Inc.,  a  Delaware
corporation  (the "Company"),  WinStar Credit Corp., a Delaware  corporation and
wholly owned  subsidiary of the Company  ("WCC" and,  together with the Company,
the "Sellers"),  and each of the purchasers  (individually,  a "Purchaser"  and,
collectively,  the  "Purchasers")  set forth on the execution  pages hereof (the
"Execution Pages").


                  WHEREAS, the Company, WCC and the Purchasers are executing and
delivering  this  Agreement  in  reliance  upon the  exemption  from  securities
registration  afforded by the  provisions of Regulation D  ("Regulation  D"), as
promulgated by the United States Securities and Exchange  Commission (the "SEC")
under the Securities Act of 1933, as amended (the "Securities Act");

                  WHEREAS, each of the Purchasers desires to purchase,  upon the
terms and conditions stated in this Agreement, the number of units (the "Units")
set forth on Schedule  1(a)  hereto,  each Unit  consisting  of (a) one thousand
shares of the Company's 6% Series A Cumulative  Convertible Preferred Stock, par
value  $0.01  per  share  (the  "Preferred   Stock"),   and  (b)  warrants  (the
"Warrants"), in the form attached hereto as Exhibit B, to purchase 400 shares of
the Company's common stock, par value $0.01 per share (the Common Stock),  at an
exercise price of $25.00 per share,  subject to adjustment as provided  therein.
The rights,  preferences  and privileges of the Preferred  Stock,  including the
terms upon which such Preferred Stock is convertible into shares of Common Stock
are set forth in the form of Certificate of Designations, Preferences and Rights
attached hereto as Exhibit A (the "Certificate of  Designation").  The shares of
Preferred Stock to be issued and sold hereunder are  hereinafter  referred to as
the "Preferred Shares";

                  WHEREAS,  immediately  prior to the  Closing  Date the Company
will make a  contribution  to the capital of WCC consisting of 416,670 shares of
Preferred Stock and 166,668 Warrants to provide for WCC's sale of such Preferred
Stock and Warrants to the Purchasers pursuant to this Agreement;




<PAGE>


                                                                                


                  WHEREAS,  contemporaneous  with the  execution and delivery of
this  Agreement the parties  hereto are executing and  delivering a Registration
Rights  Agreement,  in the form attached hereto as Exhibit C (the  "Registration
Rights Agreement"),  pursuant to which the Company has agreed to provide certain
registration  rights  under the  Securities  Act and the  rules and  regulations
promulgated thereunder, and applicable state securities laws;

                  NOW,  THEREFORE,  the Company,  WCC and the Purchasers  hereby
agree as follows:

     1. Purchase and Sale of the Units.

     (a) Purchase of the Units.  Subject to the satisfaction (or waiver) of the
conditions  thereto set forth in Section 6 and Section 7 below,  on February 11,
1997 (the "Closing  Date") the Company shall issue and the Sellers shall sell to
each Purchaser and each Purchaser shall purchase from the Sellers that number of
Units set forth next to such  Purchaser's name on Schedule 1(a) attached hereto.
The purchase  price for each Unit shall be $25,000.

     (b) Form of  Payment.  On the  Closing  Date each  Purchaser  shall pay the
aggregate  purchase  price for the Units  purchased  by such  Purchaser  by wire
transfer  to the  Company  or WCC,  as the case may be, in  accordance  with the
appropriate  Seller's  written  wiring  instructions,  against  delivery of duly
executed  certificates  representing  the  Preferred  Shares  and  the  Warrants
comprising the Units,  and the Sellers shall deliver such  certificates  against
delivery of such aggregate purchase price.

     2. Purchasers'  Representations and Warranties. Each Purchaser, solely with
respect to such Purchaser, represents and warrants to the Sellers that:

     (a) Investment  Purpose.  Purchaser is purchasing the Preferred Shares, the
shares of Common Stock  issuable  upon  conversion  of the  Preferred  Shares or
otherwise pursuant to the Certificate of Designation (the "Conversion  Shares"),
the  Warrants  and the shares of Common  Stock  issuable  upon  exercise  of the
Warrants (the "Warrant Shares" and,  collectively with the Preferred Shares, the
Conversion  Shares and the Warrants,  the  "Securities"))  for  Purchaser's  own
account,  for  investment  purposes  only and not with a view towards the public
sale or distribution thereof,  except pursuant to sales that are exempt from the
registration


<PAGE>


                                                                                


requirements of the Securities Act or sales registered under the Securities Act.
Purchaser  understands  that  Purchaser  must  bear  the  economic  risk of this
investment  indefinitely,  unless the Securities are registered  pursuant to the
Securities  Act and any  applicable  state  securities  or blue  sky  laws or an
exemption  from such  registration  is  available,  and that the  Company has no
present  intention of registering any such Securities other than as contemplated
by the Registration Rights Agreement.

     (b) Accredited  Investor Status.  Purchaser is an "Accredited  Investor" as
that term is defined in Rule 501(a)(1), (2), (3) (5) or (7) of Regulation D.

     (c) Reliance on Exemptions.  Purchaser understands that the Units are being
offered and sold to  Purchaser in reliance  upon  specific  exemptions  from the
registration requirements of United States Federal and state securities laws and
that the Sellers are relying  upon the truth and  accuracy  of, and  Purchaser's
compliance with, the representations,  warranties,  agreements,  acknowledgments
and  understandings  of Purchaser  set forth  herein in order to  determine  the
availability  of such exemptions and the eligibility of Purchaser to acquire the
Preferred Shares and the Warrants.

     (d) Information. Purchaser and its counsel, if any, have been furnished all
materials  relating to the  business,  finances  and  operations  of the Company
(including without  limitation,  the SEC Documents (as hereinafter  defined))and
materials  relating  to the offer  and sale of the  Securities  which  have been
requested by Purchaser or its counsel.  Purchaser and its counsel,  if any, have
been afforded the  opportunity to ask questions of the Company and have received
what  Purchaser  believes  to be  satisfactory  answers  to any such  inquiries.
Neither such  inquiries nor any other due diligence  investigation  conducted by
Purchaser or its counsel or any of its  representatives  shall modify,  amend or
affect Purchaser's right to rely on the Sellers'


<PAGE>


representations  and  warranties   contained  in  Section  3  below.   Purchaser
understands that Purchaser's investment in the Securities involves a high degree
of risk.

     (e)  Governmental  Review.  Purchaser  understands  that no  United  States
Federal  or state  agency or any other  government  or  governmental  agency has
passed  upon the  merits of or made any  recommendation  or  endorsement  of the
Securities.

     (f) Transfer or Resale.  Purchaser understands that (i) the Securities have
not been and, except as provided in the Registration  Rights Agreement,  are not
being  registered under the Securities Act or any state securities laws, and may
not be offered,  sold, pledged or otherwise  transferred unless (a) subsequently
registered  thereunder,  or (b) Purchaser shall have delivered to the Company an
opinion of counsel (which opinion and counsel shall be reasonably  acceptable to
the Company) to the effect that the Securities to be sold or transferred  may be
sold or transferred  pursuant to an exemption from such  registration  (together
with, if requested by the Company, a certificate from the transferee  containing
representations  consistent  with the  conclusions  contained in such opinion in
form and substance reasonably acceptable to the Company) or (c) sold pursuant to
Rule 144  promulgated  under the  Securities  Act (or a successor  rule)  ("Rule
144"); (ii) any sale of such Securities made in reliance on Rule 144 may be made
only in accordance with the terms of said Rule and further,  if said Rule is not
applicable,  any  resale of such  Securities  under  circumstances  in which the
seller  (or the  person  through  whom the sale is made)  may be deemed to be an
underwriter  (as  that  term is  defined  in the  Securities  Act)  may  require
compliance  with some other  exemption under the Securities Act or the rules and
regulations of the SEC  thereunder;  and (iii) neither the Company nor any other
person is under any obligation to register such Securities  under the Securities
Act or any state  securities  laws or to comply with the terms and conditions of
any exemption thereunder,  in each case, other than pursuant to the Registration
Rights Agreement.

<PAGE>

     (g) Legends.  Purchaser understands that the Preferred Shares, the Warrants
and the  certificates  for the Conversion  Shares and Warrant Shares (until such
time as the Conversion  Shares and Warrant Shares have been registered under the
Securities Act as contemplated by the Registration Rights Agreement or otherwise
may be sold by Purchaser  pursuant to Rule 144 without any restriction as to the
public resale  thereof)  shall bear a restrictive  legend in  substantially  the
following form (and a stop-transfer  order may be placed against transfer of the
certificates for such Securities):

             THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT
              BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
               AMENDED (THE "SECURITIES ACT"). THE SECURITIES HAVE
             BEEN ACQUIRED FOR INVESTMENT PURPOSES ONLY AND MAY NOT
      BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO
                         (A) AN EFFECTIVE REGISTRATION
              STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT
     AND ANY APPLICABLE STATE SECURITIES LAW, (B) AN OPINION OF COUNSEL, IN
      FORM, SUBSTANCE AND SCOPE REASONABLY ACCEPTABLE TO THE COMPANY, THAT
     REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT OR ANY APPLICABLE
         STATE SECURITIES LAW OR (C) RULE 144 UNDER THE SECURITIES ACT.

     The legend set forth above  shall be removed and the Company  shall issue a
certificate  without such legend to the holder of any Security  upon which it is
stamped, if, unless otherwise required by state securities laws, (a) the sale of
such  Security  is  registered  under the  Securities  Act,  or (b) such  holder
provides the Company with an opinion of counsel,  in form,  substance  and scope
reasonably  acceptable  to the  Company,  to the  effect  that a public  sale or
transfer of such Security may be made without  registration under the Securities
Act or (c) such holder provides the Company with reasonable assurances that such
Security  can be sold  pursuant to Rule 144 without  any  restriction  as to the
number  of  Securities  acquired  as of a  particular  date  that  can  then  be
immediately  sold.  Purchaser  agrees to sell all  Securities,  including  those
represented by a certificate(s) from which the legend has been removed, pursuant
to an effective  registration  statement and in accordance  with the  prospectus
delivery  requirements  set  forth  in the  rules  promulgated  by the SEC or in
compliance  with an exemption from the  registration  requirements of applicable
securities  law. In the event the above  legend is removed from any Security and
thereafter the effectiveness of a registration  statement covering such Security
is suspended or the Company determines that a supplement or amendment thereto is
required by applicable  securities laws, then upon reasonable  advance notice to
Purchaser  the Company may require  that the above  legend be placed on any such
Security  that  cannot  then  be  sold  pursuant  to an  effective  registration
statement or Rule 144 (without any  restriction  as to the number of  Securities
acquired  as of a  particular  date that can then be  immediately  sold),  which
legend  shall be removed  when such  Security  may again be sold  pursuant to an
effective  registration  statement  or  Rule  144  (without  the  aforementioned
restriction).

<PAGE>

     (h)  Authorization;  Enforcement.  Purchaser  has  full  right,  power  and
authority to enter into this Agreement and the Registration Rights Agreement and
to consummate  the  transactions  contemplated  hereunder and  thereunder.  This
Agreement  and the  Registration  Rights  Agreement  have been duly and  validly
authorized,  executed and  delivered  on behalf of  Purchaser  and are valid and
binding agreements of Purchaser enforceable in accordance with their terms.

     (i)  Residency;  Citizenship.  Purchaser  is a resident  of the state and a
citizen of the country set forth next to Purchaser's name on Schedule 1(a).

     (j) Acknowledgments  Regarding Placement Agent. Purchaser acknowledges that
Credit  Suisse  First  Boston  Corporation  is acting as  placement  agent  (the
"Placement  Agent")  for  the  Securities  being  offered  hereby  and  will  be
compensated  by the  Company  for  acting in such  capacity.  Purchaser  further
acknowledges  that the  Placement  Agent has acted solely as placement  agent in
connection  with  the  offering  of the  Securities  by the  Sellers,  that  the
information  and data provided to Purchaser  and referred to in  subsection  (d)
above have not been  subjected  to  independent  verification  by the  Placement
Agent,  and that the Placement  Agent makes no  representation  or warranty with
respect to the  accuracy  or  completeness  of such  information,  data or other
related disclosure  material.  Purchaser further acknowledges that in making its
decision to enter into this  Agreement and purchase the Securities it has relied
on its own  examination  of the  Company  and the  terms  of,  and the risks and
consequences, of holding, the Securities.

     (k)  Acknowledgment  of Use of Proceeds.  The  Purchaser  acknowledges  and
understands that the Company and WCC intend to use the proceeds derived from the
sale of the Securities for working capital for the Company's  telecommunications
and non-telecommunications  businesses and to make investments in, acquire, make
loans to, or otherwise enter into business  arrangements  with,  companies which
may  or  may  not  be  involved  in the  telecommunications  business.  In  that
connection,  the Company and/or WCC may contribute  such proceeds to WinStar New
Media Company, Inc. and other subsidiaries of the Company which acquire, produce
and  distribute  information  and  entertainment  content  or  engage  in  other
non-telecommunication businesses.

<PAGE>

     (l) 10% Owner.  After giving effect to the purchase of Preferred  Stock and
Warrants  hereunder,  such  Purchaser  will  not own  10% or more of the  voting
securities of the Company.

     3.  Representations  and Warranties of the Company.  The Company represents
and warrants to each Purchaser that:

     (a)   Organization  and   Qualification.   The  Company  and  each  of  its
subsidiaries is a corporation duly organized and existing in good standing under
the laws of the jurisdiction in which it is incorporated,  and has the requisite
corporate  power to own its properties and to carry on its business as now being
conducted.  The  Company and each of its  subsidiaries  is duly  qualified  as a
foreign corporation to do business and is in good standing in every jurisdiction
in which the nature of the  business  conducted  by it makes such  qualification
necessary  and where the  failure  so to qualify  would have a Material  Adverse
Effect.  "Material  Adverse  Effect"  means any material  adverse  effect on the
operations,  properties, financial condition or prospects of the Company and its
direct and indirect  subsidiaries on a consolidated basis or on the transactions
contemplated hereby.

     (b)  Authorization;  Enforcement.  (i)(a) The  Sellers  have the  requisite
corporate power and authority to enter into and perform this Agreement,  and the
Company  has the  requisite  corporate  power and  authority  to enter  into and
perform the  Registration  Rights Agreement and the Warrants and (b) the Company
has the  requisite  corporate  power and authority to issue and the Sellers have
the requisite corporate power and authority to sell the Preferred Shares and the
Warrants in  accordance  with the terms hereof and the Company has the requisite
corporate power and authority to issue the Conversion  Shares and Warrant Shares
upon  conversion  of  the  Preferred   Shares  and  exercise  of  the  Warrants,
respectively,  in  accordance  with the terms  thereof;  (ii) the  execution and
delivery of this  Agreement by the Sellers and the execution and delivery by the
Company  of  the  Registration   Rights  Agreement  and  the  Warrants  and  the
consummation by the Sellers of the transactions  contemplated hereby and thereby
(including  without  limitation  the  issuance by the  Company of the  Preferred
Shares and the Warrants and the  issuance  and  reservation  for issuance by the
Company of the Conversion Shares and Warrant Shares issuable upon conversion and
exercise  thereof) have been duly  authorized by the Company's or WCC's Board of
Directors,  as the case may be, and no further consent or  authorization  of the
Sellers, each of their Board or Directors or its stockholders is required (under
Rule 4460(i) promulgated by the National  Association of Securities Dealers (the
"NASD") or otherwise); (iii) this Agreement has been duly executed and delivered
by the Sellers;  and (iv) this  Agreement  constitutes,  and, upon execution and
delivery by the Company of the  Registration  Rights  Agreement and the Warrants
such agreements will  constitute,  valid and binding  obligations of the Company
and/or WCC, as the case may be, and will be  enforceable  against the Company or
WCC, as the case may be, in accordance with their terms.

<PAGE>

     (c)  Capitalization.  The  capitalization  of the  Company  as of the  date
hereof,  including the authorized  capital stock and the number of shares issued
and outstanding  (including the number of shares reserved for issuance  pursuant
to the  Company's  stock  option  plans and the  number of shares  reserved  for
issuance  pursuant  to  securities  (other  than the  Preferred  Shares  and the
Warrants) exercisable for, or convertible into or exchangeable for any shares of
Common Stock) is set forth on Schedule 3(c). All of such  outstanding  shares of
capital stock have been, or upon issuance will be,  validly  issued,  fully paid
and  nonassessable.  No shares of capital  stock of the Company  (including  the
Preferred  Shares,  the Conversion Shares and the Warrant Shares) are subject to
preemptive rights or any other similar rights of the stockholders of the Company
or any  liens or  encumbrances.  Except  as  disclosed  in  Schedule  3(c) or as
contemplated  herein,  as of the  date  of  this  Agreement,  (i)  there  are no
outstanding  options,   warrants,  scrip,  rights  to  subscribe  to,  calls  or
commitments  of any  character  whatsoever  relating to, or securities or rights
convertible into or exchangeable for, any shares of capital stock of the Company
or any of its  subsidiaries,  or arrangements by which the Company or any of its
subsidiaries is or may become bound to issue additional  shares of capital stock
of the Company or any of its  subsidiaries,  and (ii) there are no agreements or
arrangements  under which the Company or any of its subsidiaries is obligated to
register the sale of any of its or their  securities  under the  Securities  Act
(except the Registration  Rights Agreement and agreements  pursuant to which the
Company has already filed registration statements). The Company has furnished to
counsel for the Purchasers true and correct copies of the Company's  Certificate
of   Incorporation   as  in  effect  on  the  date   hereof   ("Certificate   of
Incorporation")  and the Company's  By-laws as in effect on the date hereof (the
"By-laws").  Prior to the Closing Date, the Certificate of  Designation,  in the
form attached as Exhibit A hereto,  will have been duly filed with the Secretary
of State of Delaware and, on and after the Closing Date, the Purchasers  will be
entitled to the rights set forth therein.  The Sellers shall provide  Purchasers
with a  written  update of this  representation  signed  by the  Seller's  Chief
Executive Officer, Chief Financial Officer or Executive Vice President on behalf
of the Company as of the Closing Date.

     (d) Issuance of Shares.  The Preferred Shares are duly authorized and, upon
issuance in accordance with the terms of this Agreement, will be validly issued,
fully  paid and  non-assessable,  and free from all  taxes,  liens,  claims  and
encumbrances and will not be subject to or in violation of preemptive  rights or
other similar rights of stockholders of the Company.  The Conversion  Shares and
Warrant  Shares  are duly  authorized  and  reserved  for  issuance,  and,  upon
conversion  of the  Preferred  Shares and exercise of the Warrants in accordance
with the terms thereof,  will be validly issued,  fully paid and non-assessable,
and free from all taxes,  liens, claims and encumbrances and will not be subject
to or in violation of preemptive  rights or other similar rights of stockholders
of the Company.

<PAGE>

     (e) No Conflicts. The execution, delivery and performance of this Agreement
by the Sellers,  the execution,  delivery and  performance  of the  Registration
Rights Agreement and the Warrants by the Company, the performance by the Company
of its obligations under the Certificate of Designation, and the consummation by
the  Sellers of the  transactions  contemplated  hereby and  thereby  (including
without  limitation the issuance by the Company of the Preferred  Shares and the
Warrants  and the issuance  and  reservation  for issuance by the Company of the
Preferred Shares (as payment of a dividend or otherwise),  Conversion Shares and
Warrant  Shares)  will not (i)  conflict  with or result in a  violation  of the
Certificate of Incorporation or By-laws (although Purchaser understands that the
Company   currently  has  75,000,000  shares  of  Common  Stock  authorized  and
49,505,119  shares  of  Common  Stock  outstanding  after  giving  effect to the
exercise  of  all  outstanding  options  and  warrants  and  conversion  of  all
convertible  securities  as of the date  hereof  and that,  accordingly,  if the
market price of the Common Stock  decreases  significantly,  the Company may not
have a  sufficient  number of shares of Common  Stock  authorized  to issue upon
conversion of the Preferred Stock or exercise of the Warrants, in which case the
Company shall use its best efforts to promptly  increase its  authorized  Common
Stock to accommodate such  issuances),  (ii) conflict with or result in a breach
or violation of any terms or provisions of, or constitute a default (or an event
which with  notice or lapse of time or both would  become a default)  under,  or
give  to  others  any  rights  of   termination,   amendment,   acceleration  or
cancellation  of, any  agreement,  indenture  or other  instrument  to which the
Company or any of its subsidiaries is a party, or (iii) result in a violation of
any law or any  rule,  regulation,  order,  judgment  or  decree of any court or
governmental   agency   (including   federal  and  state   securities  laws  and
regulations)  applicable to the Company or any of its  subsidiaries  or by which
any  property  or asset of the  Company or any of its  subsidiaries  is bound or
affected (except for, in the case of both (ii) and (iii) above,  such conflicts,
defaults, terminations, amendments, accelerations,  cancellations and violations
as would not, individually or in the aggregate, have a Material Adverse Effect).
Neither  the  Company  nor  any  of  its  subsidiaries  is in  violation  of its
Certificate  of  Incorporation,  By-laws or other  organizational  documents and
neither the Company nor any of its  subsidiaries is in default (and no event has
occurred which,  with notice or lapse of time or both,  would put the Company or
any of its  subsidiaries  in default)  under,  nor has there  occurred any event
giving others (with notice or lapse of time or both) any rights of  termination,
amendment,   acceleration  or  cancellation  of,  any  agreement,  indenture  or
instrument to which the Company or any of its  subsidiaries  is a party,  except
for possible defaults or rights as would not,  individually or in the aggregate,
have  a  Material  Adverse  Effect.  The  businesses  of  the  Company  and  its
subsidiaries  are not being  conducted,  and shall not be conducted so long as a
Purchaser  owns any of the  Securities,  in violation  of any law,  ordinance or
regulation  of any  governmental  entity,  except for  possible  violations  the
sanctions for which either singly or in the aggregate  would not have a Material
Adverse  Effect.  Except as  specifically  contemplated by this Agreement and as
required  under the Securities Act and any  applicable  state  securities  laws,
neither of the Sellers is required to obtain any consent, authorization or order
of, or make any filing or registration with, any court or governmental agency or
any regulatory or self-regulatory agency in order for it to execute,  deliver or
perform any of its obligations  under this Agreement,  the  Registration  Rights
Agreement or the Warrants or to perform its obligations under the Certificate of
Designation,  in each case in accordance  with the terms hereof or thereof.  The
Company is not in violation of the listing  requirements  of the Nasdaq National
Market ("NASDAQ") and does not reasonably  anticipate that the Common Stock will
be delisted from NASDAQ for the foreseeable future.

<PAGE>

     (f) SEC  Documents,  Financial  Statements.  Since  December 31, 1995,  the
Company has timely filed all reports,  schedules,  forms,  statements  and other
documents  required  to be filed by it with the SEC  pursuant  to the  reporting
requirements  of the Securities  Exchange Act of 1934, as amended (the "Exchange
Act") (all of the  foregoing  filed  prior to the date  hereof and all  exhibits
included  therein and financial  statements and schedules  thereto and documents
(other than exhibits)  incorporated by reference  therein,  taken together with,
and as supplemented by, the Company's preliminary  prospectus dated December 20,
1996) being hereinafter referred to herein as the "SEC Documents").  The Sellers
have delivered to counsel for the Purchasers true and complete copies of the SEC
Documents, except for such exhibits, schedules and incorporated documents. As of
their respective dates, the SEC Documents complied in all material respects with
the  requirements  of the Exchange Act and the rules and  regulations of the SEC
promulgated  thereunder  applicable  to the SEC  Documents,  and none of the SEC
Documents  at the time  they  were  filed  with  the SEC  contained  any  untrue
statement of a material  fact or omitted 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.  As of their
respective  dates,  the financial  statements of the Company included in the SEC
Documents  complied  as  to  form  in  all  material  respects  with  applicable
accounting  requirements and the published rules and regulations of the SEC with
respect thereto. Such financial statements have been prepared in accordance with
generally  accepted  accounting  principles,  consistently  applied,  during the
periods  involved  (except (i) as may be otherwise  indicated in such  financial
statements  or the  notes  thereto,  or (ii) in the  case of  unaudited  interim
statements,  to the extent they may include  footnotes  or may be  condensed  or
summary statements) and fairly present in all material respects the consolidated
financial  position of the Company and its  consolidated  subsidiaries as of the
dates thereof and the  consolidated  results of their  operations and cash flows
for the periods then ended  (subject,  in the case of unaudited  statements,  to
normal  year-end  audit  adjustments).  Except  as set  forth  in the  financial
statements  of the Company  included in the SEC Documents or except as set forth
on Schedule 3(f), the Company has no liabilities, contingent or otherwise, other
than (i) liabilities  incurred in the ordinary course of business  subsequent to
the date of such financial  statements and (ii) obligations  under contracts and
commitments  incurred in the ordinary  course of business and not required under
generally  accepted  accounting  principles  to be reflected  in such  financial
statements,  which,  individually  or in the aggregate,  are not material to the
financial  condition or operating  results of the Company.  The Sellers have not
provided to any Purchaser any  information  which,  according to applicable law,
rule or regulation, should have been disclosed publicly by the Sellers but which
has not been so disclosed;  provided;  however, that the Purchasers  acknowledge
that the Company has  disclosed to them  preliminary  estimates of its operating
results for the year ended December 31, 1996 ("96 Results").

     (g) Absence of Certain Changes. Since September 30, 1996, there has been no
material  adverse  change and no material  adverse  development in the business,
properties,  operations, financial condition, results of operations or prospects
of the Company, except as disclosed in the SEC Documents. Purchaser acknowledges
that  the 96  Results  do not  constitute  such a  material  adverse  change  or
development.

     (h) Absence of Litigation.  Except as disclosed in the SEC Documents, there
is  no  action,  suit,  proceeding,   inquiry  or  investigation  (collectively,
"Proceedings")  before  or  by  any  court,  public  board,  government  agency,
self-regulatory organization or body pending or, to the knowledge of the Company
or any of its subsidiaries,  threatened against or affecting the Company, any of
its  subsidiaries,  or any of their  respective  directors  or officers in their
capacities as such, except for such Proceedings  which, if determined  adversely
to the Company,  would not, singly or in the aggregate,  have a Material Adverse
Effect.

<PAGE>

     (i) Disclosure.  All information  relating to or concerning the Sellers set
forth in this Agreement,  taken together with, and as  supplemented  by, the SEC
Documents, is true and correct in all material respects and the Sellers have not
omitted to state any material  fact  necessary  in order to make the  statements
made  herein or  therein,  in light of the  circumstances  under which they were
made,  not  misleading.  No event or  circumstance  has  occurred or exists with
respect  to  the  Company  or  any  of  its  subsidiaries  or  their  respective
businesses,  properties,  prospects,  operations or financial conditions, which,
under  applicable  law,  rule  or  regulation,  requires  public  disclosure  or
announcement  by the  Company but which has not been so  publicly  announced  or
disclosed.

     (j) Acknowledgment  Regarding  Purchasers' Purchase of the Securities.  The
Sellers  acknowledges  and agree that the Purchasers are not acting as financial
advisors or fiduciaries of the Sellers (or in any similar capacity) with respect
to this Agreement and the transactions contemplated hereby, and any advice given
by  Purchasers,  or  any of  their  respective  representatives  or  agents,  in
connection  with this  Agreement  and the  transactions  contemplated  hereby is
merely  incidental to the Purchasers'  purchase of the Preferred  Shares and the
Warrants.  The Sellers  further  represent to the  Purchasers  that the Sellers'
decision to enter into this  Agreement has been based solely on the  independent
evaluation of the Sellers and their representatives.

     (k)  Current  Public  Information.  The  Company is  currently  eligible to
register the resale of its Common Stock on a registration  statement on Form S-3
under the Securities Act.

     (l) No General  Solicitation.  Neither of the Sellers nor, to either of the
Seller's knowledge, any distributor  participating on the Sellers' behalf in the
transactions  contemplated  hereby  (if  any),  nor to  either  of the  Seller's
knowledge  any  person  acting  for the  Sellers  or any such  distributor,  has
conducted any "general  solicitation,"  as such term is defined in Regulation D,
with respect to any of the Securities being offered hereby.

     (m)  No  Integrated  Offering.  Neither  the  Sellers,  nor  any  of  their
affiliates,  nor any person  acting on its or their  behalf,  has,  directly  or
indirectly,  made any offers or sales of any security or solicited any offers to
buy any security  under  circumstances  that would require  registration  of the
Securities being offered hereby under the Securities Act.

<PAGE>

     (n) No Brokers.  Neither of the  Sellers  has taken any action  which would
give rise to any claim by any person for brokerage commissions, finder's fees or
similar payments by any Purchaser relating to this Agreement or the transactions
contemplated  hereby,  except  for  dealings  with the  Placement  Agent,  whose
customary fee and certain expenses will be paid by the Company.

     4. Covenants.

     (a) Best  Efforts.  The  parties  shall use their  best  efforts  timely to
satisfy each of the conditions described in Section 6 and 7 of this Agreement.

     (b) Form D; Blue Sky Laws. The Company agrees to file a Form D with respect
to the Securities as required  under  Regulation D and to provide a copy thereof
to each Purchaser  promptly after such filing.  The Company shall,  on or before
the Closing Date, take such action as the Company shall reasonably  determine is
necessary  to  qualify  the  Preferred  Stock and the  Warrants  for sale to the
Purchasers  pursuant to this Agreement under any applicable  securities or "blue
sky" laws of the states of the United States or obtain exemption therefrom,  and
shall provide evidence of any such action so taken to each Purchaser on or prior
to such Closing Date.

     (c) Reporting Status. So long as the Purchasers beneficially own any of the
Securities  and such  Securities  represent  more than the right to receive only
cash from the Company (or its  successor)  upon  exercise  thereof,  the Company
shall timely file all reports  required to be filed with the SEC pursuant to the
Exchange  Act,  and the  Company  shall not  terminate  its  status as an issuer
required to file reports  under the Exchange Act even if the Exchange Act or the
rules and regulations thereunder would permit such termination.

     (d) Use of Proceeds.  The Sellers  shall use the proceeds  from the sale of
the Units for general corporate purposes.

     (e) Financial Information. The Company agrees to send the following reports
to each Purchaser  until such Purchaser  transfers,  assigns or sells all of its
interest in the Securities: (i) within ten days after the filing with the SEC, a
copy of its Annual  Report on Form 10-K,  its proxy  statements,  its  Quarterly
Reports on Form 10-Q and any  Current  Reports on Form 8-K;  and (ii) within two
days after their release, copies of all press releases issued by the Company.

     (f) Reservation of Shares.  Except as set forth in Section  (3)(e)(i),  the
Company  shall at all times have  authorized  and  reserved  for the  purpose of
issuance a  sufficient  number of shares of Common Stock to provide for the full
conversion of the  outstanding  Preferred  Shares and issuance of the Conversion
Shares in  connection  therewith  and the full  exercise of the Warrants and the
issuance  of the Warrant  Shares in  connection  therewith.  In that  regard,  a
"sufficient  number of shares"  with  respect to the  Preferred  Shares shall be
deemed to be equal to such number of Conversion  Shares issuable upon conversion
of the outstanding  Preferred  Shares if the Conversion Price (as defined in the
Certificate of Designation) were 50% of the Conversion Price then in effect. The
Company  shall not reduce  the number of shares  reserved  for  issuance  of the
Conversion  Shares and the  Warrant  Shares  without  the consent of each of the
Purchasers, which consent will not be unreasonably withheld.

<PAGE>

     (g)  Listing.  The  Company  shall  promptly  secure  the  listing  of  the
Conversion Shares and Warrant Shares upon each national  securities  exchange or
automated  quotation  system,  if any, upon which the shares of Common Stock are
then listed (subject to official notice of issuance) and shall maintain, so long
as any other  shares of Common  Stock  shall be so listed,  such  listing of all
Conversion  Shares from time to time issuable  upon  conversion of the Preferred
Shares and  Warrant  Shares  from time to time  issuable  upon  exercise  of the
Warrants.

     (h) Corporate  Existence.  So long as any Purchaser  beneficially  owns any
Preferred  Shares or Warrants and such Securities  represent more than the right
to receive only cash from the Company (or its successor) upon exercise  thereof,
the Company  shall  maintain its corporate  existence,  except in the event of a
merger,  consolidation  or sale  of all or  substantially  all of the  Company's
assets where the surviving or successor entity in such transaction or the parent
thereof assumes the Company's obligations hereunder and under the agreements and
instruments entered into in connection herewith regardless of whether or not the
Company would have had a sufficient  number of shares of Common Stock authorized
and  available  for issuance in order to affect the  conversion of all Preferred
Shares and exercise in full of all Warrants  outstanding  as of the date of such
transaction.

     (i)  Expenses.  The Company  shall pay all expenses  incurred in connection
with the  negotiation,  execution,  delivery and  performance of this Agreement,
including the fees and expenses of Cravath,  Swaine & Moore, special counsel for
the Purchasers.

     5. Transfer  Agent  Instructions.  The Company shall  instruct its transfer
agent to issue certificates, registered in the name of the appropriate Purchaser
or its nominee,  for the Conversion Shares and Warrant Shares in such amounts as
specified from time to time by such Purchaser to the Company upon  conversion of
the Preferred  Shares or exercise of the Warrants.  Prior to registration of the
Conversion  Shares and Warrant Shares under the Securities Act or resale of such
Securities  under Rule 144,  all such  certificates  shall bear the  restrictive
legend specified in Section 2(g) of this Agreement. The Company warrants that no
instruction other than such instructions  referred to in this Section 5 and stop
transfer  instructions to give effect to Section 2(f) hereof, in the case of the
Conversion  Shares and Warrant  Shares prior to  registration  of the Conversion
Shares and Warrant Shares under the Securities Act, will be given by the Company
to its transfer agent and that the Securities shall, except as may be limited by
applicable  securities laws,  otherwise be freely  transferable on the books and
records of the Company as and to the extent  provided in this  Agreement and the
Registration  Rights Agreement.  Nothing in this Section shall affect in any way
the  Purchasers'  obligation  as set forth in Section  2(f) hereof to resell the
Securities  pursuant to an effective  registration  statement  and in accordance
with the prospectus delivery  requirements set forth in the rules promulgated by
the SEC or in compliance with an exemption from the registration requirements of
any  applicable  securities  laws.  If a Purchaser  provides the Company with an
opinion of counsel,  which opinion of counsel shall be reasonably  acceptable to
the Company,  to the effect that the Securities to be sold or transferred may be
sold or  transferred  pursuant to an exemption  from  registration,  the Company
shall permit the transfer, and, in the case of the Conversion Shares and Warrant
Shares,  shall  promptly  instruct  its  transfer  agent  to  issue  one or more
certificates  in  such  name  and in such  denominations  as  specified  by such
Purchaser.

<PAGE>

     6.  Conditions to the Company's  Obligation to Sell.  The obligation of the
Company hereunder to issue and the obligation of each of the Sellers to sell the
Units  to  each  of the  Purchasers  on  the  Closing  Date  is  subject  to the
satisfaction,  or the waiver by the applicable Seller, on or before such Closing
Date, of each of the following conditions:

     (a) Purchaser  shall have executed the signature page to this Agreement and
the Registration Rights Agreement, and delivered the same to the Sellers;

     (b) Purchaser  shall have  delivered the aggregate  purchase  price for the
Units purchased in accordance with Section 1(b) above;

     (c) Each  representation  and warranty of the  Purchaser,  on and as of the
Closing Date,  shall be true and correct in all material  respects with the same
effect as though made on and as of the Closing Date (except for  representations
and  warranties  that  speak as of a  specific  date) and  Purchaser  shall have
performed,  satisfied and complied in all material  respects with the covenants,
agreements and conditions required by this Agreement to be performed,  satisfied
or complied with by Purchaser on or prior to the Closing Date;

     (d) No  statute,  rule,  regulation,  executive  order,  decree,  ruling or
injunction  shall have been  enacted,  entered,  promulgated  or endorsed by any
court or governmental authority of competent jurisdiction or any self-regulatory
organization  having  authority  over  the  matters  contemplated  hereby  which
prohibits  the  consummation  of any of the  transactions  contemplated  by this
Agreement.

     7. Conditions to each Purchaser's Obligation to Purchase. The obligation of
each of the  Purchasers  hereunder  to purchase the Units on the Closing Date is
subject to the satisfaction,  or waiver by each of the Purchasers,  on or before
the Closing Date, of each of the following conditions:

     (a) Each of the Sellers shall have executed this  Agreement and the Company
shall have executed the Registration Rights Agreement, and delivered the same to
the Purchasers;

     (b) The Certificate of Designation shall have been accepted for filing with
the  Secretary  of  State  of  Delaware,  and a copy  thereof  certified  by the
Secretary of State shall have been delivered to counsel for the Purchasers;

<PAGE>

     (c) The  Sellers  shall have  delivered  to each  Purchaser  duly  executed
certificates  representing  the Preferred Shares and Warrants being purchased in
accordance with Section 1(b) above;

     (d) The Common  Stock shall  continue to be  authorized  for  quotation  on
NASDAQ and trading in the Common Stock (or NASDAQ generally) shall not have been
suspended by the SEC or NASD;

     (e) (i) Each representation and warranty of the Sellers shall be, on and as
of the Closing  Date,  true and correct in all material  respects  with the same
effect as though made on and as of the Closing Date (except for  representations
and  warranties  that speak as of a specific date other than the Closing  Date),
(ii) the Sellers  shall have  performed,  satisfied and complied in all material
respects  with  the  covenants,  agreements  and  conditions  required  by  this
Agreement to be performed, satisfied or complied with by the Sellers on or prior
to the Closing Date and (iii) the Purchasers  shall have received a certificate,
executed by an appropriate  executive officer of the respective Seller and dated
as of the Closing Date, to the foregoing  effect and as to such other matters as
may be reasonably requested by the Purchasers;

     (f) No  statute,  rule,  regulation,  executive  order,  decree,  ruling or
injunction  shall have been  enacted,  entered,  promulgated  or endorsed by any
court or governmental authority of competent jurisdiction or any self-regulatory
organization  having  authority  over the  matters  contemplated  hereby,  which
prohibits  the  consummation  of any of the  transactions  contemplated  by this
Agreement;

     (g) The Purchasers shall have received the officer's  certificate described
in Section 3(c) above, dated as of the Closing Date; and

     (h) The Purchasers shall have received  opinions of the Company's  counsel,
dated as of the Closing  Date,  (i) with  respect to Federal  telecommunications
matters, in form, scope and substance reasonably satisfactory to the Purchasers,
and (ii) with respect to other matters, in substantially the form of Exhibit D-1
attached hereto.

     8. Governing Law; Miscellaneous. (a) Governing Law. THIS AGREEMENT SHALL BE
GOVERNED BY AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK
WITHOUT  REGARD TO THE PRINCIPLES OF CONFLICT OF LAWS. THE PARTIES HERETO HEREBY
SUBMIT TO THE EXCLUSIVE JURISDICTION OF THE UNITED STATES FEDERAL COURTS LOCATED
IN NEW YORK CITY WITH RESPECT TO ANY DISPUTE ARISING UNDER THIS  AGREEMENT,  THE
AGREEMENTS ENTERED INTO IN CONNECTION HEREWITH OR THE TRANSACTIONS  CONTEMPLATED
HEREBY OR THEREBY.

<PAGE>

     (b)   Counterparts.   This  Agreement  may  be  executed  in  two  or  more
counterparts,  all of which shall be considered  one and the same  agreement and
shall  become  effective  when  counterparts  have been signed by each party and
delivered to the other party.

     (c)  Headings.  The  headings  of this  Agreement  are for  convenience  of
reference  and shall not form part of, or affect  the  interpretation  of,  this
Agreement.

     (d)  Severability.  If any provision of this Agreement  shall be invalid or
unenforceable in any jurisdiction, such invalidity or unenforceability shall not
affect the validity or  enforceability of the remainder of this Agreement or the
validity or enforceability of this Agreement in any other jurisdiction.

     (e)  Entire  Agreement;  Amendments.  This  Agreement  and the  instruments
referenced  herein contain the entire  understanding of the parties with respect
to the matters covered herein and therein and, except as specifically  set forth
herein  or  therein,   neither  of  the  Sellers  or  the  Purchasers  make  any
representation,  warranty, covenant or undertaking with respect to such matters.
No provision of this  Agreement  may be waived  other than by an  instrument  in
writing signed by the party to be charged with  enforcement  and no provision of
this  Agreement may be amended other than by an instrument in writing  signed by
each of the Sellers and all of the Purchasers.

<PAGE>

     (f) Notices.  Any notices required or permitted to be given under the terms
of this Agreement  shall be sent by certified or registered mail (return receipt
requested) or delivered  personally or by courier or by confirmed telecopy,  and
shall be effective three days after being placed in the mail, if mailed, or upon
receipt  or  refusal  of  receipt,  if  delivered  personally  or by  courier or
confirmed telecopy, in each case addressed as follows:

                          If to either of the Sellers:

                          WinStar Communications, Inc.
                                 230 Park Avenue
                               New York, NY 10169
                         Attn: Timothy Graham, Executive
                       Vice President and General Counsel

                                  with copy to:

                            Graubard Mollen & Miller
                                600 Third Avenue
                               New York, NY 10016
                          Attn: David Alan Miller, Esq.

                  If to a Purchaser,  to the address set forth immediately below
such Purchaser's name on the Execution Pages.

                  Each party shall  provide  notice to the other  parties of any
change in address.

     (g) Successors and Assigns.  This Agreement shall be binding upon and inure
to the benefit of the parties and their  successors and assigns.  Neither of the
Sellers  or  the  Purchasers  shall  assign  this  Agreement  or any  rights  or
obligations   hereunder   without  the  prior  written  consent  of  the  other.
Notwithstanding  the  foregoing,  each of the  Purchasers  may assign its rights
hereunder to any of such Purchaser's "affiliates", as that term is defined under
the Exchange Act, to the extent such affiliate  acquires the Preferred Stock and
Warrants from such  Purchaser,  without the consent of the  appropriate  Seller.
This  provision  shall not limit a Purchaser's  right to transfer the Securities
pursuant to the terms of the Certificate of  Designation,  the Warrants and this
Agreement  or to  assign  such  Purchaser's  rights  under  the  Certificate  of
Designation,  the Warrants and the Registration Rights Agreement (but not this 4
Agreement) to any such transferee.

     (h) Third Party  Beneficiaries.  This Agreement is intended for the benefit
of the parties hereto and their respective permitted successors and assigns, and
is not for the benefit  of, nor may any  provision  hereof be  enforced  by, any
other person.

     (i) Survival.  The  representations  and  warranties of the Sellers and the
agreements  and  covenants set forth in Sections 3, 4, 5 and 8 shall survive the
Closing Date hereunder notwithstanding any due diligence investigation conducted
by or on behalf of the  Purchasers.  The Company  agrees to  indemnify  and hold
harmless  each  of  the  Purchasers  and  each  of  such  Purchaser's  officers,
directors, employees, partners, agents and affiliates and each of the Purchasers
agrees to  indemnify  and hold  harmless  each of the  Sellers  and each of such
Seller's officers,  directors,  employees,  partners,  agents and affiliates for
loss or damage  arising as a result of or related to any breach (or, in the case
of a claim by anyone against any such person, any alleged breach) by the Sellers
(for purposes of the Sellers'  indemnification)  or such Purchaser (for purposes
of such Purchaser's  indemnification) of any of its representations or covenants
set forth herein, including advancement of expenses as they are incurred.

<PAGE>

     (j) Publicity.  The Company and each of the Purchasers shall have the right
to approve  before  issuance  any press  releases,  SEC,  NASDAQ,  NASD or other
regulatory  filings,  or  any  other  public  statements  with  respect  to  the
transactions  contemplated  hereby or the identity of the Purchasers;  provided,
however,  that the Company shall be entitled,  without the prior approval of the
Purchasers,  to make any press release or SEC, NASDAQ,  NASD or other regulatory
filings with respect to such  transactions  as is required by applicable law and
regulations.  The  parties  hereto  agree that the press  release in the form of
Exhibit E hereto shall be released promptly after execution hereof.

     (k) Further  Assurances.  Each party shall do and  perform,  or cause to be
done and  performed,  all such  further acts and things,  and shall  execute and
deliver all such other agreements,  certificates,  instruments and documents, as
the other  party may  reasonably  request  in order to carry out the  intent and
accomplish  the  purposes  of  this  Agreement  and  the   consummation  of  the
transactions contemplated hereby.

     (l) Personal and Other Liability. The Purchasers understand and acknowledge
that  no  recourse  under  or upon  any  obligation,  covenant,  representation,
warranty or agreement of the Company hereunder,  or in the Warrant,  Certificate
of Designations or Registration  Rights  Agreement,  shall be had against WCC or
against  any  incorporator,   shareholder,   officer,   director,   employee  or
controlling  person of the Company or WCC or of any  successor  person  thereof.
Each  Purchaser,  by  accepting  the  Preferred  Stock and  Warrant,  waives and
releases all such liability.




<PAGE>


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


                                           WINSTAR COMMUNICATIONS, INC.,


                                           by: /s/
                                              -------------------------
                                         Name:
                                        Title:
 
                                             WINSTAR CREDIT CORP.


                                           by:  /s/
                                              --------------------------
                                         Name:
                                        Title:


                                                  THE PURCHASERS:
                                     BY CREDIT SUISSE FIRST BOSTON CORPORATION


                                           by: /s/
                                              -------------------------
                                         Name:
                                        Title:

<PAGE>



                          WINSTAR COMMUNICATIONS, INC.

                          CERTIFICATE OF ELIMINATION OF

                     SERIES A, SERIES B, SERIES C, SERIES D
                          AND SERIES E PREFERRED STOCK

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


                         Pursuant to Section 151 of the
                        Delaware General Corporation Law

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



                  WinStar  Communications,  Inc., a  corporation  organized  and
existing   under  the  General   Corporation   Law  of  the  State  of  Delaware
("Corporation"),


                  DOES HEREBY CERTIFY:


     FIRST: The name of the Corporation is: WinStar Communications, Inc.

     SECOND:  That the  Corporation  was originally  incorporated in Delaware on
September 28, 1990 under the name Robern  Apparel,  Inc. and changed its name to
"Robern   Industries,   Inc."  on  October   9,  1992  and  again  to   "WinStar
Communications, Inc." on December 2, 1993.

     THIRD:  That a class of Series A Preferred  Stock, par value $.01 per share
("Series A Preferred Stock"),  was established by the Corporation's  Certificate
of Incorporation as filed with the Delaware  Secretary of State on September 28,
1990, with such terms and conditions as set forth in such Certificate.

     FOURTH:  That a class of Series B Preferred Stock, par value $.01 per share
("Series B Preferred  Stock"),  was  established by the  Corporation's  Restated
Certificate of  Incorporation  as filed with the Delaware  Secretary of State on
April 2, 1991, with such terms and conditions as set forth in such Certificate.

     FIFTH:  That a class of Series C Preferred  Stock, par value $.01 per share
("Series C Preferred Stock"),  was established by the Corporation's  Certificate
of  Designations,  Preferences  and Rights of 6% Series C Convertible  Preferred
Stock as filed with the Delaware  Secretary  of State on August 27,  1991,  with
such terms and conditions as set forth in such Certificate.

     SIXTH:  That a class of Series D Preferred  Stock, par value $.01 per share
("Series D Preferred Stock"),  was established by the Corporation's  Certificate
of Designations,  Preferences and Rights of Series D Convertible Preferred Stock
as filed with the Delaware  Secretary  of State on February 15, 1994,  with such
terms and conditions as set forth in such Certificate.

     SEVENTH: That a class of Series E Preferred Stock, par value $.01 per share
("Series E Preferred Stock"),  was established by the Corporation's  Certificate
of Designations,  Preferences and Rights of Series E Convertible Preferred Stock
as filed with the Delaware  Secretary of State on September 21, 1994,  with such
terms and conditions as set forth in such Certificate.

     EIGHTH: That no issued shares of the Series A, Series B, Series C, Series D
or Series E Preferred  Stock remain  outstanding  and the  Corporation no longer
desires to issue any shares of such Preferred Stock.

     NINTH:  That  pursuant to the authority so vested in the board of directors
pursuant to Section 151(g) of the Delaware General Corporation Law, the board of
directors by unanimous  written consent dated February 4, 1997, duly adopted the
following resolution:

     RESOLVED, that, since none of the previously designated Series A, Series B,
Series C, Series D or Series E Preferred  Stock are outstanding and none will be
issued  in  accordance  with  the  Corporation's  Certificate  of  Incorporation
previously


<PAGE>



filed and supplemented by Certificates of Designations,  Rights and Preferences,
which  established  the  Series  A,  Series B,  Series  C,  Series D or Series E
Preferred Stock, the Corporation's Board of Directors, pursuant to the authority
vested  in it by the  provisions  of  Section  151(g)  of the  Delaware  General
Corporation  Law,  hereby  eliminates  from  the  Corporation's  Certificate  of
Incorporation,  as amended and supplemented,  all matters set forth therein with
respect to the previously  designated  Series A, Series B, Series C, Series D or
Series E Preferred Stock and the Corporation,  by its Board of Directors,  deems
such  previously  designated  Series A, Series B, Series C, Series D or Series E
Preferred Stock to be cancelled.

     IN WITNESS  WHEREOF,  we have  executed this  Certificate  on behalf of the
Corporation,  under penalties of perjury, and believe the facts stated herein to
be true, this 5th day of February 1997.


                                           WINSTAR COMMUNICATIONS, INC.



                                             By: /s/ Timothy R. Graham
                                                --------------------------      
                                                    Timothy R. Graham
                                                  Executive Vice President


                                             By: /s/ Kenneth J. Zinghini
                                                --------------------------
                                                   Kenneth J. Zinghini
                                                   Assistant Secretary










                                                         

<PAGE>


                           CORPORATE ACKNOWLEDGEMENTS


STATE OF New York)
                                    : ss.:
COUNTY OF New York)


                  On the 5th day of February  1997,  before me  personally  came
Timothy R. Graham,  to me known, who, being by me duly sworn, did depose and say
that he believes the facts stated in the  Certificate of Elimination to be true;
that he is the Executive  Vice  President of WinStar  Communications,  Inc., the
corporation described in and which executed the foregoing  instrument;  and that
he  signed  his  name  thereto  by  order  of the  board  of  directors  of said
corporation.



- -----------------------------                      ---------------------------
Notary Public                                      Commission Expiration Date



STATE OF New York)
                                    : ss.:
COUNTY OF New York)


                  On the 5th day of February  1997,  before me  personally  came
Kenneth J. Zinghini,  to me known,  who, being by me duly sworn,  did depose and
say that he believes the facts stated in the  Certificate  of  Elimination to be
true; that he is the Assistant  Secretary of WinStar  Communications,  Inc., the
corporation described in and which executed the foregoing  instrument;  and that
he  signed  his  name  thereto  by  order  of the  board  of  directors  of said
corporation.




- -----------------------------                      ---------------------------
Notary Public                                       Commission Expiration Date


Pursuant to Section 151(g) of the Delaware General Corporation Law, at such time
as the above  Certificate  is filed and  accepted by the  Delaware  Secretary of
State,  the Certificate  will  automatically  become effective and will have the
effect  of  eliminating   from  the   Corporation's   Restated   Certificate  of
Incorporation,  as amended,  all matters set forth  therein  with respect to the
Series A, Series B, Series C, Series D and Series E Preferred Stock.







<PAGE>







                          CERTIFICATE OF DESIGNATIONS,
                             PREFERENCES AND RIGHTS

                                       of

               6% SERIES A CUMULATIVE CONVERTIBLE PREFERRED STOCK

                                       of

                          WINSTAR COMMUNICATIONS, INC.

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




                  WinStar  Communications,  Inc., a  corporation  organized  and
existing  under  the  General  Corporation  Law of the  State of  Delaware  (the
"Corporation"),  hereby certifies that,  pursuant to the authority vested in the
Board of  Directors  of the  Corporation  (the "Board of  Directors")  under its
Articles of  Incorporation,  and in accordance  with Section 151 of the Delaware
General  Corporation  Law,  the Board of  Directors  has adopted  the  following
resolution:

                  RESOLVED, that pursuant to the authority granted to and vested
in the Board of Directors of this  Corporation in accordance with the provisions
of its Articles of  Incorporation,  the Board of Directors  does hereby  create,
authorize  and  provide  for  the  issuance  of a  series  of the  Corporation's
preferred  stock,  par value $0.01 per share,  and hereby states the designation
and number of shares,  and fixes the relative rights,  preferences,  privileges,
powers and restrictions thereof as follows:

                           6% Series A Cumulative Convertible Preferred Stock:

                    Designation  and Amount.  The  designation  of this  series,
which  consists  of  6,000,000  shares of  Preferred  Stock,  is the 6% Series A
Cumulative  Convertible  Preferred Stock (the "Preferred  Stock") and the stated
value shall be Twenty-Five Dollars ($25.00) per share (the "Stated Value").

                    Rank.  All  shares of the  Preferred  Stock  shall  rank (i)
senior to the Corporation's common stock, par value $0.01 per share (the "Common
Stock") and to any other  class of capital  stock or series of  preferred  stock
established  hereafter  by the  Board of  Directors,  the  terms of which do not
expressly provide that it ranks senior to or pari passu with the Preferred Stock
(collectively,  the  "Junior  Securities"),  (ii) pari  passu  with any class or
series of preferred stock established  hereafter by the Board of Directors,  the
terms of which  expressly  provide  that it ranks pari passu with the  Preferred
Stock (the "Pari Passu Securities"), and (iii) junior to any class or series of


<PAGE>



Preferred  Stock  of the  Corporation  established  hereafter  by the  Board  of
Directors,  the terms of which expressly  provide that such class or series will
rank senior to the Preferred Stock (the "Senior  Securities"),  in each case, as
to the distribution of assets upon liquidation, dissolution or winding up of the
Corporation, whether voluntary or involuntary or, with respect to the payment of
dividends.

                    Dividends.  (a)  The  Corporation  shall  pay  out of  funds
legally  available  therefor  a fixed  dividend  on each  outstanding  share  of
Preferred  Stock at a rate per annum equal to 6.0% of the Stated  Value (or 6.5%
during the occurrence of a Registration  Default (as such term is defined in and
according to the terms of, the Registration Rights Agreement,  dated February 6,
1997, between the Corporation and the parties thereto)).  Dividends on shares of
Preferred Stock shall accrue and be cumulative from the date of issuance of such
shares. Dividends shall be payable in arrears quarterly as of March 31, June 30,
September  30 and December 31 of each year (each a "Dividend  Payment  Date") to
the holders of record of the Preferred Stock on the preceding March 15, June 15,
September  15 and  December  15  (each a  "Regular  Dividend  Date").  Dividends
accruing for any period less than a full dividend period will be computed on the
basis of a 360-day  year  comprised  of 12  30-day  months.  Dividends  shall be
payable,  on a cumulative  basis, such that any unpaid dividends will accumulate
and the arrearage shall be paid in full prior to any dividends being paid to the
holders of Junior Securities.

                  (b) Any dividend on the  Preferred  Stock  pursuant to Section
3(a) shall be, at the  option of the  Corporation,  payable  (i) in cash or (ii)
through the issuance of a number of  additional  shares  (rounded to the nearest
whole share) of Preferred Stock (the "Additional  Shares") equal to the dividend
amount divided by the Stated Value of such Additional Shares.

                  (c) All dividends paid with respect to shares of the Preferred
Stock  pursuant to Section  3(a) shall be paid pro rata to the holders  entitled
thereto.

                  (d) In the  event  that  full  dividends  are not paid or made
available to the holders of all outstanding shares of Preferred Stock and of any
Pari Passu  Securities  and funds  available  for payment of dividends  shall be
insufficient  to permit payment in full to holders of all such stock of the full
preferential  amounts to which they are then  entitled,  then the entire  amount
available for payment of dividends  shall be distributed  ratably among all such
holders of Preferred Stock and of any Pari Passu Securities in proportion to the
full amount to which they would otherwise be respectively entitled.

                  (e) Preferred  Stock  surrendered  for  conversion  during the
period from the close of business on any Regular  Dividend  Date next  preceding
any Dividend  Payment Date must be  accompanied by payment in cash or Additional
Shares, as the case may be, in an amount equal to the accrued and


<PAGE>



unpaid dividend  thereon which the holder thereof is to receive on such Dividend
Payment Date in respect of the Preferred Stock so surrendered.

                  Liquidation Preference.  (a) If the Corporation shall commence
a  voluntary  case under the  Federal  bankruptcy  laws or any other  applicable
Federal or State bankruptcy,  insolvency or similar law, or consent to the entry
of an  order  for  relief  in an  involuntary  case  under  any  law  or to  the
appointment   of  a  receiver,   liquidator,   assignee,   custodian,   trustee,
sequestrator  (or  other  similar   official)  of  the  Corporation  or  of  any
substantial  part of its property,  or make an assignment for the benefit of its
creditors,  or admit in writing its inability to pay its debts generally as they
become due, or if a decree or order for relief in respect of the Corpora-

tion shall be entered  by a court  having  jurisdiction  in the  premises  in an
involuntary  case  under the  Federal  bankruptcy  laws or any other  applicable
Federal  or  State  bankruptcy,  insolvency  or  similar  law  resulting  in the
appointment   of  a  receiver,   liquidator,   assignee,   custodian,   trustee,
sequestrator  (or  other  similar   official)  of  the  Corporation  or  of  any
substantial  part of its property,  or ordering the winding up or liquidation of
its affairs,  and any such decree or order shall be unstayed and in effect for a
period of 60 consecutive  days and, on account of any such event (a "Liquidation
Event"),  the  Corporation  shall  liquidate,  dissolve  or wind  up,  or if the
Corporation  shall  otherwise  liquidate,  dissolve or wind up, no  distribution
shall be made to the holders of any shares of Common Stock or Junior  Securities
upon liquidation,  dissolution or winding up unless prior thereto the holders of
shares of the Preferred Stock shall have received the Liquidation Preference (as
defined in Section 4(b)) with respect to each share. If upon the occurrence of a
Liquidation  Event,  the assets and funds available for  distribution  among the
holders of the  Preferred  Stock and holders of Pari Passu  Securities  shall be
insufficient to permit the payment to such holders of the Liquidation Preference
(as defined  below)  payable  thereon,  then the entire  assets and funds of the
Corporation  legally  available for  distribution to the Preferred Stock and the
Pari  Passu  Securities  shall be  distributed  ratably  among  such  shares  in
proportion  to the ratio that the  Liquidation  Preference  payable on each such
share bears to the aggregate Liquidation Preference payable on all such shares.

                  (b) For purposes hereof,  "Liquidation  Preference"  means (i)
with respect to a share of Preferred  Stock,  the Stated Value  thereof plus the
amount of any accrued and unpaid dividends as of the date of final  distribution
to the  holder  thereof or with  respect  to any other  event as of the date the
measurement  of such  Liquidation  Preference is relevant to such event and (ii)
with respect to any Pari Passu  Securities,  as set forth in the  Certificate of
Designation filed in respect thereof.

                    Conversion Rights.  (a) (i) Subject to the limitations
contained in Section 5(a)(ii) below, each holder of shares of the Preferred 
Stock may, at any time and from time to time upon surrender of the certificates
therefor,


<PAGE>



convert any or all of its shares of Preferred Stock into shares of Common Stock.
Each share of  Preferred  Stock shall be  convertible  into such number of fully
paid and  nonassessable  shares of Common Stock as is determined by dividing (x)
the  Liquidation  Preference  thereof by (y) the  Conversion  Price (as  defined
below) then in effect.

                (ii)  Conversion of shares of the Preferred Stock
shall be subject to the following limitations:

                           (a)  Prior to August 11, 1997, holders of the
Preferred  Stock may not convert any shares of Preferred Stock and any Notice of
Conversion (as defined below)  delivered to the  Corporation  prior to such time
will be void and of no effect.

                           (b)  On and after August 11, 1997 and prior
to November  11,  1997,  holders of the  Preferred  Stock may convert  shares of
Preferred  Stock in  accordance  with the  procedures  set forth in Section 5(f)
below subject, however, to the following additional conditions:

                  (1)  any  holder  electing  to  convert  any  such  shares  of
         Preferred  Stock  shall  be  required  to  surrender   Preferred  Stock
         Certificates  (as defined in Section 5(f) below)  constituting  200% of
         the number of shares of Preferred Stock to be converted as set forth in
         the related  Notice of  Conversion  (as defined in Section 5(f) below);
         and

                  (2)  upon  honoring  any  such  Notice  of   Conversion,   the
         Corporation   shall   place  a  legend   upon  the  share   certificate
         representing  the balance of such shares prior to returning  such share
         certificate  to such holder,  which legend will prohibit the conversion
         of the shares of Preferred Stock represented  thereby prior to November
         11, 1997, and thereupon the balance of such shares may not be converted
         prior to such  date  and any  Notice  of  Conversion  delivered  to the
         Corporation with respect to such shares prior to such date will be void
         and of no effect.

                           (C)  Notwithstanding clauses (A) and (B)
above,  on and after the Change of  Control  Date (as  defined  in Section  6(b)
below), all of the shares of Preferred Stock may be converted without limitation
as to date or amount;  provided,  however,  that for purposes of this  paragraph
(C), the  definition  of "Change of Control"  shall be deemed to not include the
exception for the Permitted Investor.

                           (D)      If a holder of Preferred Stock requests
a  conversion  of such  shares  and the  Conversion  Price  (as  defined  below)
applicable  to such  conversion  is less  than  $15.00  (as such  amount  may be
adjusted from time to time pursuant to Section 5(e) below, the "Minimum Price"),
the  Corporation  may, in lieu of converting such shares of Preferred Stock into
shares of Common  Stock,  pay such holder in cash an amount equal to 110% of the
Liquidation  Preference for each such share of Preferred  Stock  requested to be
converted; provided, however, that the Corporation may


<PAGE>



not  exercise  such cash payment  option  after  February 11, 1998 unless (1) at
least 30 days and not more than 60 days prior thereto the Corporation shall have
notified the holders of the Preferred  Stock in good faith that the  Corporation
intends to exercise such option with respect to any such  conversion  within the
applicable  period;  provided further,  however,  that the giving of such notice
will not obligate the  Corporation  to exercise  such option at any time and (2)
during the applicable period the conversion of the Preferred Stock and resale of
the Common Stock issued upon such  conversion does not require the delivery of a
statutory  prospectus under the Securities Act or, if it does, such a prospectus
is then available.  Notwithstanding the foregoing,  in order for the Corporation
to exercise  any such cash  payment  option at any time,  the  Corporation  must
notify  the holder of such  Preferred  Stock (to the fax number set forth on the
related  Notice of Conversion) of such election not later than 10:00 p.m. on the
next Trading Date following  receipt of such Notice of Conversion.  In the event
that the  Corporation  receives  a notice by 8:30 a.m.  on any day from a holder
indicating an interest in converting  Preferred  Stock,  the Corporation may not
elect to utilize the cash pay option  referred to in the  preceding  sentence in
connection  with any  conversion  of such holder's  Preferred  Stock on such day
unless the  Corporation  notifies such holder by 9:30 a.m. that the  Corporation
intends to elect to utilize  such option with respect to such  Preferred  Stock.
The notice to the Corporation  shall be made by fax to a number specified by the
Corporation in writing prior to the initial  conversion  date to all the holders
of the  Preferred  Stock,  and such notice to any such  holder  shall be made by
telephone  to  the  number  specified  by  such  holder  in  its  notice  to the
Corporation.

                  (b)  Conversion  Price.  Subject to Section  5(c)  below,  the
"Conversion  Price"  shall be (i) with  respect to any  conversion  of Preferred
Stock  occurring on a  Conversion  Date (as defined in Section  5(f)(iv)  below)
prior to  February  11,  1998,  the lesser of (x) $25.00 (as such  amount may be
adjusted  from time to time  pursuant  to Section  5(c),  the  "Initial  Maximum
Price") and (y) the average of the  closing  bid prices  (subject to  adjustment
pursuant  to  Section  5(d)) for the  Common  Stock as  reported  by the  Nasdaq
National Market, or the principal securities exchange or other securities market
on which the Common  Stock is then being traded (the  "Closing Bid Price"),  for
the Trading Period (as defined below) ending on the last Trading Day immediately
preceding  the  Conversion  Date,  and (ii) with  respect to any  conversion  of
Preferred  Stock occurring on a Conversion Date that is on or after February 11,
1998 the lesser of (x) the Initial  Maximum Price on the Trading Day immediately
preceding  February  11,  1998 and (y) the average of the Closing Bid Prices for
the Trading Period ending on the last Trading Day immediately preceding February
11, 1998 (the Conversion Price determined in accordance with clause (ii), as the
same may be adjusted from time to time  pursuant to Section  5(c),  being herein
called the "Final Conversion Price").  For purposes of this Agreement,  "Trading
Day" shall  mean any day on which the  Common  Stock is traded for any period on
the Nasdaq National Market or on the principal


<PAGE>



securities exchange or other securities market on which the Common Stock is then
being traded and "Trading  Period" shall mean 20  consecutive  Trading Days. The
Corporation will promptly notify the holders of the Preferred Stock of the
Final Conversion Price.

                  (c)  Conversion Price Adjustments.  The then Applicable
Conversion Price (as defined below) shall be subject to adjustment from time to
time as follows:

     (i) Adjustment Due to Stock Split, Stock Dividend, Etc. If at any time when
any  shares of  Preferred  Stock  are  issued  and  outstanding,  the  number of
outstanding  shares  of  Common  Stock  is  increased  by a stock  split,  stock
dividend,  combination,  reclassification or other similar event, the Applicable
Conversion  Price  shall  be  proportionately  reduced,  or  if  the  number  of
outstanding  shares of Common  Stock is  decreased  by a  reverse  stock  split,
combination  or   reclassification  of  shares,  or  other  similar  event,  the
Applicable Conversion Price shall be proportionately  increased.  In such event,
the Corporation  shall notify the Transfer Agent of such change on or before the
effective date thereof. The "Applicable Conversion Price" shall mean, (i) during
the period prior to February 11, 1998, the Initial  Maximum Price (as such price
may be  adjusted  from  time to time)  and (ii)  during  the  period on or after
February 11,  1998,  the Final  Conversion  Price (as such price may be adjusted
from time to time).

     (ii) Adjustment Due to Merger, Consolidation, Etc. If, at any time when any
shares of  Preferred  Stock are issued and  outstanding,  there shall be (i) any
reclassifica-  tion or change of the  outstanding  shares of Common Stock (other
than a change in par value,  or from par value to no par  value,  or from no par
value to par value, or as a result of a subdivision or combination  described in
Section 5(c)(i) above), (ii) any consolidation or merger of the Corporation with
any other  corporation  (other  than a merger in which  the  Corporation  is the
surviving or continuing  entity and its capital stock is  unchanged),  (iii) any
sale or transfer of all or substantially all of the assets of the Corporation or
(iv) any share  exchange  pursuant to which all of the out-  standing  shares of
Common Stock are converted into other  securities or property,  then the holders
of Preferred Stock shall thereafter have the right to receive upon conversion of
their  Preferred  Stock,  upon  the  basis  and upon the  terms  and  conditions
specified  herein  and in  lieu  of  the  shares  of  Common  Stock  immediately
theretofore  issuable upon conver- sion,  such shares of stock,  securities  and
other  property as may be issued or payable  with  respect to or in exchange for
the  number of  shares of Common  Stock  immediately  theretofore  issuable  and
receivable  upon the conversion of the Preferred  Stock held by such holders had
such merger, consolidation, exchange of shares, recapitalization, reorganization
or other  similar  event  not  taken  place,  and in any such  case  appropriate
provisions shall be made with respect to the rights and interests of the holders
of the  Preferred  Stock to the effect that the  provisions  hereof  (including,
without limitation, provisions for adjustment of the Applicable Conversion Price
and the corresponding number of shares of


<PAGE>



Common Stock issuable upon conversion of the Preferred  Stock) shall  thereafter
be  applicable,  as nearly as may be  practicable  in  relation to any shares of
stock or securities  thereafter  deliverable  upon the conversion  thereof.  The
Corporation  shall not effect any transaction  described in this subsection (ii)
unless (x) each holder of the Preferred  Stock has been mailed written notice of
such  transaction  at least 20 days prior  thereto and in no event later than 10
days prior to the record date for the determination of shareholders  entitled to
vote with respect thereto,  and (y) the resulting  successor or acquiring entity
(if not the Corporation)  assumes by written  instrument the obligations of this
subsection  (ii). The above  provisions shall apply regardless of whether or not
there would have been a sufficient  number of shares of Common Stock  authorized
and  available for issuance  upon  conversion  of the shares of Preferred  Stock
outstanding as of the date of such trans- action,  and shall  similarly apply to
successive reclassi- fications,  consolidations,  mergers,  sales,  transfers or
share exchanges.

     (iii) Adjustment Due to Distribution. In the event that at any time or from
time to time the Corporation shall distribute to all holders of Common Stock (i)
any  dividend or other  distribution  of cash,  evidences  of its  indebtedness,
shares of its capital  stock or any other  properties  or securities or (ii) any
options,  warrants or other rights to subscribe for or purchase any of the fore-
going  (other  than,  in each  case,  (w) the  issuance  of any  rights  under a
shareholder  rights plan, (x) any dividend or distribution  described in Section
5(c)(i),  (y) any rights,  options,  warrants or securities described in Section
5(c)(iv) and (z) any cash dividends or other cash  distributions from current or
retained earnings) (a  "Distribution"),  then, in each such case, after the date
of record for determining shareholders entitled to such Distribution,  but prior
to the date of  Distribution,  the holders of Preferred Stock shall be entitled,
upon  conversion  of shares of  Preferred  Stock,  to receive the amount of such
assets  which  would have been  payable to the holder had such  holder  been the
holder of such shares of Common  Stock on the record date for the  determination
of shareholders  entitled to such Distribution.  The Applicable Conversion Price
for shares of Preferred  Stock not converted  prior to the date of  Distribution
will be reduced to a price  determined by decreasing the  Applicable  Conversion
Price in effect immediately prior to the record date of the Distribu- tion by an
amount equal to the fair market value of the assets so distributed  per share of
Common  Stock  (calculated  as if all  shares  of  Common  Stock  issuable  upon
conversion of outstanding shares of Preferred Stock had been converted as of the
record date of the  Distribution).  For purposes of determining  the fair market
value  of any  assets  so  distributed,  the  fair  market  value  of  any  cash
distributed  shall be the  amount of such  cash and the fair  value of any other
assets  so  distributed  shall  be  determined  in good  faith  by the  Board of
Directors of the Corporation,  whose determination shall be evidenced by a board
resolution,  a copy of which will be sent to the holders of the Preferred  Stock
upon request.


<PAGE>




     (iv)  Adjustment  Due to  Rights  Issue.  If,  at any time  when  shares of
Preferred Stock are issued and outstanding,  the Corporation shall distribute to
all holders of its Common Stock any rights,  options or warrants  entitling  the
holders  thereof  to  subscribe  for  shares  of  Common  Stock,  or  securities
convertible into or exchangeable or exercisable for Common Stock  (collectively,
"Rights")  at a price per share that is less than the Current  Market  Value (as
defined in Section  5(g)) as of the date such Right  first  becomes  exercisable
(the "Exercisability  Date"), then the Applicable Conversion Price for shares of
Preferred Stock not converted prior to such Exercisability Date shall be reduced
to a price  determined by multiplying the Applicable  Conversion Price in effect
immediately prior to the Exercisability Date by a fraction, (i) the numerator of
which is an amount  equal to the sum of (x) the number of shares of Common Stock
actually  outstanding  immediately prior to the Exercisability Date plus (y) the
quotient  (expressed as a number) obtained by dividing (A) the aggregate minimum
consideration  receivable  by the  Corporation  upon  the  exercise  of all such
Rights,  by (B) the  Current  Market  Value in effect  immediately  prior to the
Exercisability  Date and (ii) the  denominator  of which is the total  number of
shares of Common Stock Deemed  Outstanding (as defined below)  immediately after
the  Exercisability  Date. For purposes of this Section 5(c)(iv),  "Common Stock
Deemed  Outstanding"  shall mean the number of shares of Common  Stock  actually
outstanding  plus the maximum  total number of shares of Common  Stock  issuable
upon the exercise,  conversion or exchange of all Rights or securities  issuable
upon exercise of Rights.

     (v) Other Events. If any event occurs as to which the foregoing  provisions
of this  Section 5(c) are not strictly  applicable  or, if strictly  applicable,
would  not,  in the  good  faith  judgment  of the  Board  of  Directors  of the
Corporation,  fairly  and  adequately  protect  the  conversion  rights  of  the
Preferred Stock in accordance  with the essential  intent and principles of such
provisions,  then the Board of  Directors  shall  make such  adjustments  in the
application of such  provisions,  in accordance  with such essential  intent and
principles,  as shall be reasonably necessary,  in the good faith opinion of the
Board of Directors,  to protect such conversion  rights as aforesaid,  but in no
event shall any such  adjustment  have the effect of increasing  the  Applicable
Conversion  Price or  decreasing  the number of shares of Common Stock  issuable
upon conversion of any shares of Preferred Stock.

                  (d)  Adjustment  of Closing Bid Prices.  In the event that the
Applicable  Conversion  Price is adjusted  pursuant  to Section  5(c) during any
Trading  Period being  utilized to calculate the  Conversion  Price  pursuant to
Section 5(b) or during any period of 10 consecutive  Trading Days being utilized
to calculate  Current  Market Value,  the Closing Bid Price for each Trading Day
being  utilized  for  such  calculation  and  ending  prior  to the date of such
Applicable  Conversion Price adjustment shall be adjusted upward or downward, as
appropriate, in an amount


<PAGE>



proportionate to such Applicable Conversion Price adjustment.

                  (e)  Adjustment  of the Minimum  Price.  In the event that the
Applicable  Conversion  Price is adjusted  pursuant to Section 5(c), the Minimum
Price  shall be  adjusted  upward  or  downward,  as  appropriate,  in an amount
proportionate to such Applicable Conversion Price
adjustment.

     (f) Conversion  Procedures.  In order to convert shares of Preferred  Stock
into full shares of Common Stock,  a holder shall:  (i) prior to 10:00 p.m., New
York City time (the "Conversion Notice Deadline") on the Conversion Date, fax or
otherwise  deliver a copy of the fully executed notice of conversion in the form
attached  hereto as Exhibit 1 ("Notice of Conversion") to the Corporation at the
office of the  Corporation  that the holder  elects to convert  the same,  which
notice shall  specify the number of shares of Preferred  Stock to be  converted,
the  applicable  Conversion  Price and a calculation  of the number of shares of
Common Stock  issuable  upon such  conversion  and (ii)  surrender  the original
certificates  representing  the Preferred  Stock being converted (the "Preferred
Stock  Certificates"),  duly  endorsed,  along  with a copy  of  the  Notice  of
Conversion within three Trading Days thereafter to the office of the Corporation
or the Transfer Agent, if any, for the Preferred  Stock.  The Corporation  shall
not be obligated  to issue  certificates  evidencing  the shares of Common Stock
issuable upon such conversion unless either the Preferred Stock Certificates are
delivered to the  Corporation  or its Transfer Agent as provided  above,  or the
holder  notifies the  Corporation or its Transfer  Agent that such  certificates
have  been  lost,  stolen  or  destroyed  (subject  to  the  require-  ments  of
subparagraph  (i) below).  In the case of a dispute as to the calculation of the
Conversion  Price other than manifest error by a holder,  the Corporation  shall
promptly  issue such number of shares of Common  Stock that are not  disputed in
accordance  with  subparagraph  (ii) below.  The  Corporation  shall  submit the
disputed  calculations  to its  outside  accountant  via  facsimile  within  two
business days of receipt of the Notice of Conversion. The accountant shall audit
the  calculations  and notify the  Corporation  and the holder of the results no
later  than  two   business   days  from  the  time  it  receives  the  disputed
calculations.  The accountant's  calculation shall be deemed conclusive,  absent
manifest error.

                           (i)      Lost or Stolen Certificates.  Upon
receipt by the  Corporation  of  evidence  of the loss,  theft,  destruction  or
mutilation of any Preferred Stock Certificates  representing shares of Preferred
Stock,  and (in the case of loss, theft or destruction) of indemnity or security
reasonably  satisfactory to the Corporation,  and upon surrender and cancelation
of the Preferred  Stock  Certificate(s),  if mutilated,  the  Corporation  shall
execute and deliver new Preferred Stock  Certificate(s)  of like tenor and date.
However,  the Corporation  shall not be obligated to reissue such lost or stolen
Preferred Stock Certificate(s) if the holder contemporaneously delivers to


<PAGE>



the Corporation a Notice of Conversion electing to convert such shares of
Preferred Stock.

     (ii)  Delivery  of Common  Stock Upon  Conversion.  Upon the  surrender  of
Preferred  Stock  Certificates as described above by a holder of Preferred Stock
accompanied by a Notice of Conversion,  the Corporation  shall issue and, within
three business days after the later of the Conversion  Date and the date of such
surrender  (or, in the case of lost,  stolen or  destroyed  certificates,  after
provision of agreement and  indemnification  pursuant to subparagraph (i) above)
(the  "Delivery  Period"),  deliver  to or upon the order of the holder (i) that
number of  shares  of  Common  Stock  applicable  to that  portion  of shares of
Preferred  Stock  converted as shall be determined in accor- dance  herewith and
(ii) a certificate representing the balance of the shares of Preferred Stock not
converted, if any or, if the Corporation has validly elected, in connection with
such conversion and in accordance  with Section  5(a)(ii)(D) to pay cash in lieu
of delivery shares of Common Stock,  the  Corporation  shall pay the appropriate
cash  amount.  Upon  delivery of a Notice of  Conversion  and  surrender  of the
Preferred Stock Certificate related thereto (or an indemnification  agreement if
required  pursuant to paragraph  (i) above),  the  Corporation's  obligation  to
deliver  shares of Common  Stock shall be  absolute  and  unconditional  and the
Corporation  agrees  not to assert  (and  hereby  waives to the  fullest  extent
permitted by law) any defenses against its obligation to so deliver such shares.
In the event the  Corporation  fails to deliver  such  shares,  the  Corporation
understands  that the holder will be entitled to pursue actual damages  (whether
or not such  failure  is caused  by the  Corporation's  failure  to  maintain  a
sufficient  number of authorized  shares of Common Stock as required pursuant to
the terms of  Section  5(g)  hereof),  and each  holder  shall have the right to
pursue  all  remedies  available  at law or in  equity  (including  a decree  of
specific performance or injunctive relief).

     (iii) No Fractional  Shares.  If any  conversion  of Preferred  Stock would
result in a fractional  share of Common Stock,  such  fractional  share shall be
disregarded  and the  number  of  shares  of  Common  Stock  issuable  upon  the
conversion of the  Preferred  Stock shall be rounded to the nearest whole number
of shares.

     (iv) Conversion Date. The "Conversion  Date" shall be the date specified in
the Notice of Conversion;  provided,  however, that if the copy of the Notice of
Conversion is not submitted by facsimile (or by other means resulting in notice)
to the Corporation before 10:00 p.m., New York City time, on the Conversion Date
indicated in the Notice of  Conversion,  then the  Conversion  Date shall be the
next day.  Upon  submission  by a holder of the  Preferred  Stock of a Notice of
Conversion  with  respect to shares of  Preferred  Stock,  such shares  shall be
irrevocably deemed converted into shares of Common Stock and the holder's rights
as a holder of such converted shares of Preferred


<PAGE>



Stock  shall  cease  and   terminate,   excepting  only  the  right  to  receive
certificates  for such shares of Common Stock in accordance  with and subject to
this Section 5(f). Notwithstanding the foregoing, if the holder has not received
certificates  for such  shares of Common  Stock prior to the tenth day after the
later of the  Conversion  Date and the  delivery by the holder of the  Preferred
Stock  Certificates and any agreement and indemnity required by Section 5(f)(ii)
above, then the holder may notify the Corporation in writing of such failure and
if the holder has not  received  certificates  for such  shares of Common  Stock
prior to the tenth day after the date of such notice,  then (x) the holder shall
regain the rights of a holder of  Preferred  Stock with respect to the shares to
which the Notice of  Conversion  relates and shall  retain all of such  holder's
rights and remedies  with respect to the  Corporation's  failure to deliver such
shares of Common  Stock and (y) the  Conversion  Price in respect of each of the
shares  identified in the Notice of Conversion shall thereafter be the lesser of
(i) the Conversion  Price on the Conversion Date set forth in the initial Notice
of Conversion and (ii) the Conversion Price on the Conversion Date  subsequently
selected by the holder in respect  thereof by submission to the Corporation of a
subsequent Notice of Conversion.

     (g)  Reservation  of  Shares.  A number  of shares  of the  authorized  but
unissued Common Stock  sufficient to provide for the conversion of the Preferred
Stock  outstanding  at the then current  Conversion  Price shall at all times be
reserved by the Corporation,  free from preemptive  rights, for such conversion.
If the Corporation  shall issue any securities or make any change in its capital
structure  which  would  change the number of shares of Common  Stock into which
each share of the  Preferred  Stock  shall be  convertible  at the then  current
Conversion  Price,  the  Corporation  shall at the same time  also  make  proper
provision so that  thereafter  there shall be a  sufficient  number of shares of
Common  Stock  authorized  and  reserved,   free  from  preemptive  rights,  for
conversion of the out- standing  Preferred  Stock on such new basis.  If, at any
time, a holder of shares of Preferred  Stock submits a Notice of Conversion  and
the  Corporation  does not have  sufficient  authorized  but unissued  shares of
Common  Stock  available  to  effect  such  conversion  in  accordance  with the
provisions of this Section, the Corporation shall issue to the holder all of the
shares of Common Stock which are available to effect such  conversion  and shall
thereafter use its best efforts to obtain,  as soon as practicable,  shareholder
approval to  authorize  the  issuance of  sufficient  shares of Common  Stock to
effect conversion of the Preferred Stock outstanding.

                  (h)  Calculation  of  Adjustment.  Upon the occurrence of each
adjustment or readjustment  of the Conversion  Price pursuant to this Section 5,
the  Corporation,  at its expense,  shall  promptly  compute such  adjustment or
readjustment in accordance with the terms hereof and prepare and furnish to each
holder of  Preferred  Stock a  certificate  setting  forth  such  adjustment  or
readjustment and showing in detail the facts upon which such


<PAGE>



adjustment or readjustment is based.  The  Corporation  shall,  upon the written
request at any time of any  holder of  Preferred  Stock,  furnish or cause to be
furnished to such holder a like certificate setting forth (i) such adjustment or
readjustment,  (ii) the  Conversion  Price at the time in  effect  and (iii) the
number of shares of Common Stock and the amount,  if any, of other securities or
properties  which at the time should be received  upon  conversion of a share of
Preferred Stock.

                  (i) Current Market Value.  For purposes of this Certificate of
Designation,  "Current  Market  Value"  per share of  Common  Stock or any other
security  at any date  means (i) if the  security  is not  registered  under the
Exchange  Act, (a) the value of the  security,  determined  in good faith by the
Board  of  Directors  and  certified  in a board  resolution,  based on the most
recently completed arm's-length transaction between the Corporation and a Person
other than an affiliate of the Corporation (or between any two such Persons) and
the  closing  of which  occurs on such date or shall  have  occurred  within the
six-month period  preceding such date, or (b) if no such transaction  shall have
occurred on such date or within such six-month period, the value of the security
as  determined  by an  independent  financial  expert or (ii) if the security is
registered  under the  Exchange  Act,  the average of the Closing Bid Prices for
each Trading Day during the period  commencing  10 Trading Days before such date
and ending on the date one day prior to such date,  or if the  security has been
registered  under the  Exchange  Act for less than 10  consecutive  Trading Days
before  such date,  the average of the Closing Bid Prices for all of the Trading
Days  before  such  date for which  daily  Closing  Bid  Prices  are  available;
provided,  however,  that if the  Closing Bid Price is not  determinable  for at
least five  Trading  Days in such  period,  the  "Current  Market  Value" of the
security,  shall be determined as if the security were not registered  under the
Exchange Act.

     6. Mandatory  Conversion.(a)  All outstanding shares of the Preferred Stock
will be subject to  mandatory  conversion  on February  11, 2002 (the  "Maturity
Date"), at a price (the "Mandatory  Conversion Price") equal to the then current
Liquidation  Preference of such Preferred Stock. The Mandatory  Conversion Price
shall be paid by issuance of such number of shares of Common Stock with a value,
based upon the average of the Closing  Bid Prices for such Common  Stock  during
the Trading Period ending one Trading Day prior to the Maturity  Date,  equal to
the Mandatory Conversion Price;  provided,  however, that in lieu of issuance of
Common Stock, the Corporation may at its option make payment of all or a portion
of the Mandatory Conversion Price in cash.

     (b) If a Change of Control  occurs (the date of such  occurrence  being the
"Change of Control Date"),  then the Corporation shall notify the holders of the
Preferred Stock in writing of such occurrence and shall make an offer to convert
all or any part of such  holders  shares  of  Preferred  Stock  pursuant  to the
provisions of this Section 6(b) (the "Change of Control Offer") at an offer


<PAGE>



price,  payable  in  Common  Stock,  equal  to 101% of the  Stated  Value of the
Preferred Stock plus accrued and unpaid  dividends,  if any, thereon to the date
of  conversion  (the  "Change  of  Control  Conversion").  The Change of Control
Conversion  shall be made by issuance  of such number of shares of Common  Stock
with a value,  based upon the  average of the Closing Bid Prices for such Common
Stock  during the  Trading  Period  ending one  Trading Day prior to the date of
purchase, equal to the Change of Control Conversion;  provided, however, that in
lieu of issuance of Common Stock, the Corporation may at its option make payment
of all or a portion of the Change of Control Conversion in cash.

                  Within  30  days   following   any  Change  of  Control,   the
Corporation will mail a notice to each holder of Preferred Stock at such holders
last registered address, which notice shall state:

                  (i) that the Change of Control Offer is being made pursuant to
         this  Section  6(b) and that all  shares of  Preferred  Stock  properly
         tendered will be accepted for payment;

                  (ii) the purchase price and the purchase  date,  which will be
         no  earlier  than 45 days nor later  than 60 days from the date of such
         notice is mailed (the "Change of Control Conversion Date");

                  (iii) that any shares of Preferred Stock not properly tendered
         (unless  the  Corporation  determines,  at its  option,  to accept such
         tender) will continue to accrue dividends;

                  (iv) that,  unless the Corporation  defaults in the payment of
         the  Change  of  Control  Conversion,  all  shares of  Preferred  Stock
         accepted for payment pursuant to the Change of Control Offer will cease
         to accrue dividends after the Change of Control Conversion Date;

                  (v) that  holders  electing  to have any  shares of  Preferred
         Stock purchased  pursuant to a Change of Control Offer will be required
         to surrender  the shares of  Preferred  Stock or transfer the shares of
         Preferred  Stock to the  Corporation  at the address  specified  in the
         notice  prior to the  close  of  business  on the  third  Business  day
         preceding the Change of Control Conversion Date;

                  (vi) that holders will be entitled to withdraw  their election
         if the  Corporation  receives,  not later than the close of business on
         the second  Business  Day  preceding  the Change of Control  Conversion
         Date, a telegram, telex, facsimile transmission or letter setting forth
         the name of the holder,  the amount of Preferred  Stock  delivered  for
         purchase,  and a statement that such holder is withdrawing its election
         to have such shares of Preferred Stock purchased; and

                  (vii) that holders whose shares of Preferred Stock   are being
         purchased only in part will be issued new


<PAGE>



         certificates  of  Preferred  Stock  equal in amount to the  unpurchased
         portion  of  the  Preferred   Stock   surrendered  (or  transferred  by
         book-entry).

                  On the  Change of Control  Conversion  Date,  the  Corporation
shall,  to the extent  lawful:  (1) accept for payment  all shares of  Preferred
Stock or portions  thereof properly  tendered  pursuant to the Change of Control
Offer,  (2)  pay to the  holders  an  amount  equal  to the  Change  of  Control
Conversion in respect of all shares of their Preferred Stock or portions thereof
so tendered and (3) deliver or cause to be delivered to the holders of Preferred
Stock so accepted an  officers'  certificate  stating  the  aggregate  amount of
Preferred Stock or portions thereof being purchased by the Corporation.

                  The Corporation  will comply with any tender offer rules under
the Exchange Act which may then be applicable,  including Rules 13e-4 and 14e-1,
in  connection  with  any  offer  required  to be  made  by the  Corporation  to
repurchase the Preferred Stock as a result of a Change of Control. To the extent
that  the  provisions  of any  securities  laws  or  regulations  conflict  with
provisions of this  Certificate of  Designations,  the Corporation  shall comply
with the applicable  securities  laws and regulations and shall not be deemed to
have breached its obligations hereunder by virtue thereof.

                  On  the  Change  of  Control   Conversion  Date,   unless  the
Corporation  defaults in the payment for the shares of Preferred  Stock tendered
and not  withdrawn  pursuant  to the Change of Control  Offer,  all rights  with
respect to such shares shall forthwith cease and terminate,  except the right of
the  holder  thereof  to  receive  payment  therefor,  on the  Change of Control
Conversion Date.

                  "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  Securities
Exchange Act of 1934,  as amended  ("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 February 11, 1997  constitute  the Board of Directors of the
Corporation  (together  with any new  directors  whose  election by the Board of
Directors  of  the   Corporation  or  whose   nomination  for  election  by  the
Corporation's  stockholders was approved by a vote of at least two-thirds of the
members of the Board of Directors of the  Corporation  then in office who either
were members of the Board of Directors of the  Corporation  on February 11, 1997
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
of the Corporation then in office.

                  (c) If at any time when the  Corporation  is  obligated  under
this Section 6 to pay any amount by issuing shares of Common Stock in payment of
such amount the


<PAGE>



Corporation  is unable to satisfy  such  obligation  with the  delivery  of such
shares, the Corporation will be required to make such payment in cash.

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

     7. Voting Rights.  The holders of record of shares of Preferred Stock shall
be entitled to the following voting rights:

                  (i) those voting rights required by applicable
         law; and

                (ii) the right to vote  together  with the holders of the Common
         Stock upon any matter  submitted  to such  holders  for a vote (but the
         Preferred  Stock  shall not be  entitled  to vote as a separate  class)
         except as otherwise  expressly required by the General  Corporation Law
         of the State of Delaware.

                  Each issued and outstanding  share of Preferred Stock shall be
entitled to one vote when voting  together with the Common Stock and if entitled
to vote as a separate  class. If for any reason holders of Preferred Stock shall
be entitled to vote as a separate  class,  the holders of a majority in interest
of the Preferred Stock entitled to vote shall bind the entire class of Preferred
Stock. The Corporation shall give the holders of the Preferred Stock at least 30
days' prior notice of any matter to be submitted to such holders for a vote.

     8.  Cancelation  of Preferred  Stock.  In the event any shares of Preferred
Stock shall be converted pursuant to Section 5, the shares so converted shall be
canceled,  shall return to the status of  unauthorized,  but unissued  preferred
stock of no designated  series,  and shall not be issuable by the Corporation as
Preferred Stock.

     9.  Amendments and Other Actions.  So long as shares of Preferred Stock are
outstanding, the Corporation shall not, without first obtaining the approval (by
vote or  written  consent)  of the  holders  of at  least  66  2/3% of the  then
outstanding shares of Preferred Stock:

                  (a) alter or change the rights,  preferences  or privileges of
the  Preferred  Stock or any other  capital  stock of the  Corporation  so as to
affect adversely the Preferred Stock;

                  (b) create any new class or series of Senior Securities;

                  (c)  increase  the  authorized  number of shares of  Preferred
Stock  (except  where  necessary  to satisfy  obligations  to the holders of the
outstanding shares of Preferred Stock); or

                  (d)  issue any shares of Preferred Stock other
than pursuant to the Securities Purchase Agreement dated as


<PAGE>



of February 6, 1997, by and among the Corporation and the initial  purchasers of
the  Preferred  Stock,  pursuant  to  Section  3 hereof  or as  required  by the
Registration  Rights  Agreement  dated  February  6,  1997,  by  and  among  the
Corporation and the initial purchasers of the Preferred Stock.

                  In  the  event  holders  of at  least  66  2/3%  of  the  then
outstanding shares of Preferred Stock agree to allow the Corporation to alter or
change the rights,  preferences or privileges of the shares of Preferred  Stock,
pursuant to subsection (a) above, so as to affect the Preferred Stock,  then the
Corporation  will deliver  notice of such approved  change to the holders of the
Preferred Stock that did not agree to such alteration or change (the "Dissenting
Holders") and Dissenting Holders shall have the right for a period of 30 days to
convert  pursuant to the terms of this  Certificate of Designation as they exist
prior to such alteration or change or continue to hold their shares of Preferred
Stock.

                  Notwithstanding the foregoing, the Corporation when authorized
by  resolutions  of  its  Board  of  Directors  may  amend  or  supplement  this
Certificate without the consent of, any Holder to cure any ambiguity,  defect or
inconsistency  or make  any  other  change  provided  that  such  amendments  or
supplements shall not adversely affect the interests of the Holders.

                  10. Registration and Transfer.  The Corporation shall maintain
at its principal executive offices (or at the principal executive offices of its
transfer  agent or such  other  office or agency  of the  Corporation  as it may
designate by notice to the holders of the Preferred  Stock) a stock register for
the  Preferred  Stock in which  the  Corporation  shall  record  the  names  and
addresses of person in whose name the shares of Preferred  Stock are issued,  as
well as the name and address of each transferee.  Holders of share  certificates
for the Preferred Stock may present such  certificates for transfer and exchange
at such offices.

                  Prior to due presentment  for  registration of transfer of any
Preferred Stock, the Corporation may deem and treat the person in whose name any
Preferred  Stock is registered as the absolute owner of such Preferred Stock and
the Corporation shall not be affected by notice to the contrary.

                  No service charge shall be made to a holder of Preferred Stock
for any registration, transfer or exchange.

                  11.  Transfer  Without  Registration.  If,  at the time of the
surrender of any share  certificate in connection  with any transfer or exchange
of shares of  Preferred  Stock,  such shares shall not be  registered  under the
Securities Act of 1933, as amended (the  "Securities  Act") and under applicable
state  securities or blue sky laws, the Corporation may require,  as a condition
of allowing such transfer or exchange (i) that the holder or transferee,  as the
case may be, furnish to the Corporation a written


<PAGE>



opinion of counsel (which opinion and counsel shall be reasonably  acceptable to
the  Corporation)  to the effect  that such  transfer  or  exchange  may be made
without  registration  under  the  Securities  Act and  under  applicable  state
securities  or blue sky laws,  (ii) that the holder or  transferee  execute  and
deliver to the  Corporation  a letter in form and  substance  acceptable  to the
Corporation  stating that the transferee is acquiring such shares for investment
purposes  only and not with a view towards  distribution  thereof and (iii) that
the transferee be an "accredited investor" as defined in Rule 501(a) promulgated
under the Securities Act;  provided,  however,  that no such opinion,  letter or
status as an  "accredited  investor"  shall be  required  in  connection  with a
transfer pursuant to Rule 144 under the Securities Act (but such other customary
documentation reasonably requested by the Corporation shall be required).

                  12. Method of Payment. The Preferred Stock will be payable (if
cash  payment  is  elected  by  the  Corporation)  as  to  dividends,  Mandatory
Conversion payments,  Change of Control Conversions,  Liquidation Preference and
all other  payments  by wire  transfer  of  immediately  available  funds to the
accounts specified by the holders thereof or, if no such account is specified by
a holder, by mailing a check to such holder's registered address.

                  The  Corporation  may  satisfy  its  obligations  to make cash
payments under Section 5(a)(ii)(D), 6(a) and 6(b) by causing a subsidiary of the
Corporation to make such payment.


                  IN WITNESS WHEREOF,  WINSTAR  COMMUNICATIONS,  INC. has caused
this  Certificate  of  Designations  to be duly executed by its  Executive  Vice
President,   who  affirms  that  the  information  contained  in  the  foregoing
Certificate  of  Designations  is true under the penalties of perjury this tenth
day of February, 1997.


                                   WinStar Communications, Inc.,


                                              by: /s/ Timothy R. Graham
                                                 ------------------------
                                            Name: Timothy R. Graham
                                           Title: Executive Vice President




<PAGE>


                                                                EXHIBIT 1
                                                                 to
                                                                Certificate
                                                                of Designation







                              NOTICE OF CONVERSION

                    (To be Executed by the Registered Holder
                in order to Convert the Series A Preferred Stock)

The undersigned hereby  irrevocably elects to convert (the "Conversion")  shares
of 6% Series A Cumulative  Convertible  Preferred Stock (the "Preferred Stock"),
represented by stock certificate  Nos(s).  ______________  (the "Preferred Stock
Certificates")   into  shares  of  common  stock  ("Common  Stock")  of  WinStar
Communications,  Inc.  (the  "Corporation")  according to the  conditions of the
Certificate of Designations,  Preferences and Rights of the Preferred Stock (the
"Certificate of Designation"), as of the date written below. If shares are to be
issued in the name of a person other than the undersigned,  the undersigned will
pay all transfer taxes payable with respect  thereto and is delivering  herewith
such  certificates.  No fee will be charged  to the  holder for any  conversion,
except for transfer taxes, if any. A copy of each Preferred Stock Certificate is
attached hereto (or evidence of loss, theft or destruction thereof).

The  undersigned  represents  and  warrants  that all  offers  and  sales by the
undersigned  of the shares of Common  Stock  issuable  to the  undersigned  upon
conversion of the Preferred  Stock shall be made pursuant to registration of the
Common  Stock under the  Securities  Act of 1933,  as amended  (the  "Act"),  or
pursuant to an exemption from registration under the Act.

                                    Date of Conversion:_____________________

                                    Applicable Conversion Price:____________

                                    Number of shares of
                                    Common Stock to be Issued:______________

                                    Signature:______________________________

                                    Name:___________________________________

                                    Address:________________________________

                                    Fax No.:________________________________

* The  Corporation  is not  required to issue  shares of Common  Stock until the
original  Preferred  Stock   Certificate(s)  (or  evidence  of  loss,  theft  or
destruction  thereof) to be  converted  are received by the  Corporation  or its
Transfer Agent.  The Corporation  shall issue and deliver shares of Common Stock
to an overnight  courier not later than three business days following receipt of
the original Preferred Stock Certificate(s) to be converted.


<PAGE>



 Number           6% SERIES A CUMULATIVE CONVERTIBLE PREFERRED STOCK    Shares
 

================================================================================
                          WINSTAR COMMUNICATIONS, INC.
================================================================================

Incorporated Under The Laws Of The      See Reverse Side For Certain Definitions
State of Delaware
                    TOTAL AUTHORIZED ISSUE 90,000,000 SHARES

75,000,000 SHARES, $.01 PAR VALUE EACH, 15,000,000 SHARES, PAR VALUE $.01 EACH, 
           COMMON STOCK                                PREFERRED STOCK
                                               6,000,000 SHARES DESIGNATED AS
                                        6% SERIES A CUMULATIVE PREFERRED STOCK


         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE,  "SECURITIES  ACT").
         THE SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT  PURPOSES ONLY AND MAY
         NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED, EXCEPT PURSUANT
         TO (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE
         SECURITIES ACT AND ANY APPLICABLE  STATE SECURITIES LAW, (B) AN OPINION
         OF COUNSEL,  IN FORM,  SUBSTANCE  AND SCOPE  REASONABLY  ACCEPTABLE  TO
         WINSTAR  COMMUNICATIONS,  INC., THAT REGISTRATION IS NOT REQUIRED UNDER
         THE SECURITIES ACT OR ANY APPLICABLE  STATE SECURITIES LAWS OR (C) RULE
         144 UNDER THE SECURITIES ACT.


This is to Certify that                                       is the owner of
                        ------------------------------------                

                                    ---------
   FULLY PAID AND NON-ASSESSABLE SHARES OF 6% SERIES A CUMULATIVE CONVERTIBLE
       PREFERRED STOCK OF WINSTAR COMMUNICATIONS, INC. (the "Corporation")

transferable on the books of the Corporation by the holder hereof,  in person or
by duly  authorized  attorney,  upon  surrender  of this  Certificate,  properly
endorsed.
         The Corporation  will furnish without charge to each stockholder who so
requests,  the powers,  designations,  preferences and relative,  participating,
optional,  or other  special  rights of the 6% Series A  Cumulative  Convertible
Preferred Stock and of any other series of preferred stock which the Corporation
may  establish,  and the  qualifications,  limitations or  restrictions  of such
preferences and/or rights.

IN WITNESS  WHEREOF,  the seal of the Corporation and the signatures of its duly
authorized officers.

Dated: February 11, 1997



   ---------------------                            --------------------------- 
    Kenneth Zinghini                                   Fredric E. von Stange
   Assistant Secratary                                Executive Vice President




<PAGE>







THIS  WARRANT,  AND THE SHARES  ISSUABLE  UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES
ACT").  THE  SECURITIES  REPRESENTED  HEREBY HAVE BEEN  ACQUIRED FOR  INVESTMENT
PURPOSES  ONLY AND MAY NOT BE OFFERED,  SOLD,  PLEDGED OR OTHERWISE  TRANSFERRED
EXCEPT PURSUANT TO (A) AN EFFECTIVE  REGISTRATION STATEMENT UNDER THE SECURITIES
ACT AND ANY APPLICABLE STATE SECURITIES LAW, (B) AN OPINION OF COUNSEL, IN FORM,
SUBSTANCE AND SCOPE REASONABLY  ACCEPTABLE TO THE COMPANY,  THAT REGISTRATION IS
NOT REQUIRED UNDER THE SECURITIES ACT OR ANY APPLICABLE  STATE SECURITIES LAW OR
(C) RULE 144 UNDER THE SECURITIES ACT.



                                                                     Right to
                                                                     Purchase
                                                                  -------------
                                                                    Shares of
                                                                 Common Stock
                                                              $0.01 par value

Date:  February 11, 1997


                          WINSTAR COMMUNICATIONS, INC.
                             STOCK PURCHASE WARRANT

                  THIS CERTIFIES THAT, for value received,  _________________ or
its  registered  assigns,  is entitled to purchase from WINSTAR  COMMUNICATIONS,
INC., a Delaware  corporation (the "Company"),  at any time or from time to time
during the period specified in Section 2 hereof ________________________________
(____________)  fully,  paid and  non-assessable  shares of the Company's Common
Stock, par value $0.01 per share (the "Common Stock"), at an exercise price (the
"Exercise  Price")  of $25.00 per  share.  The number of shares of Common  Stock
issuable upon exercise  hereunder (the "Warrant  Shares") and the Exercise Price
are subject to adjustment as provided in Section 4 hereof.  The term  "Warrants"
means this Warrant and the other warrants of the Company issued  pursuant to the
Securities Purchase Agreement,  dated as of February 6, 1997, by and between the
Company  and  the  Purchasers   listed  on  the  execution  pages  thereof  (the
"Securities Purchase Agreement"). The term "Warrant Period" as used herein means
the period commencing on the date this Warrant is issued and delivered  pursuant
to the terms of the Securities  Purchase  Agreement and ending at the Expiration
Time (as defined herein).



<PAGE>



                  This Warrant is subject to the following terms, provisions and
conditions:

                  1. Manner of Exercise;  Issuance of Certificates;  Payment for
Shares.  Subject to the provisions  hereof,  including without  limitation,  the
limitations  contained in Section 7 hereof, this Warrant may be exercised by the
holder hereof,  in whole or in part, by the surrender of this Warrant,  together
with a completed  election to purchase in the form attached  hereto as Exhibit 1
(the  "Election  to  Exercise"),  to the Company on or before  10:00 p.m. on any
Business Day at the Company's  principal  executive offices or such other office
or agency of the Company as it may designate by notice to the holder hereof) and
upon (i) payment to the Company in cash,  by certified or official bank check or
by wire transfer for the account of the Company,  of the Exercise Price for each
of the Warrant Shares  specified in the Election to Exercise or (ii) delivery to
the Company of a written notice of an election to effect a Cashless Exercise (as
defined in Section 12(c) below) for the Warrant Shares specified in the Election
to Exercise. The Warrant Shares so purchased shall be deemed to be issued to the
holder hereof or such holder's designee,  as the record owner of such shares, as
of the close of  business  on the date on which  this  Warrant  shall  have been
surrendered,  the completed  Election to Exercise  shall have been delivered and
payment  shall have been made for such shares as set forth  above.  Certificates
for the Warrant Shares so purchased, representing the aggregate number of shares
specified in the Election to Exercise,  shall be delivered to the holder  hereof
within a reasonable  time, not exceeding five business days,  after this Warrant
shall have been so exercised.  The  certificates  so delivered  shall be in such
denominations  as may be requested by the holder  hereof and shall be registered
in the name of such  holder or such  other name as shall be  designated  by such
holder.  If this Warrant shall have been  exercised only in part,  then,  unless
this  Warrant has expired,  the Company  shall,  at its expense,  at the time of
delivery of such certificates,  deliver to the holder a new Warrant representing
the number of shares with respect to which this Warrant shall not then have been
exercised.

                  Upon  delivery of an Election to Exercise  and payment for the
Warrant  Shares to be purchased  thereby,  the  Company's  obligation to deliver
certificates for such Warrant Shares shall be absolute and unconditional and the
Company agrees not to assert (and hereby waives to the fullest extent  permitted
by law) any defenses against its obligation to so deliver such certificates.  In
the  event  the  Company  fails  to  deliver  such  certificates,   the  Company
understands  that the holder will be entitled to pursue actual damages  (whether
or not such failure is caused by the Company's  failure to maintain a sufficient
number of authorized shares of Common Stock as required pursuant to the terms of
Section 4(f) of the Securities Purchase Agreement and Section 3(b) hereof),  and
each holder shall have the right to pursue all  remedies  available at law or in
equity (including a decree of specific performance or injunctive relief).


<PAGE>




                  2. Period of Exercise.  This Warrant shall be  exercisable  at
any time on or after  February  11, 1998 (or earlier upon a Change of Control as
defined in Section 11 hereof) and prior to the Expiration  Time. The "Expiration
Time" shall  initially be 5:00 p.m. New York City time on the  Expiration  Date,
which  initially  shall be February 11, 2002. The Expiration Date can be changed
by the Company to any date prior to such date if

                  (i) after  February  11,  2000,  the closing bid price for the
         Common Stock on the NASDAQ  National  Market (or the last sale price of
         the Common Stock on the principal exchange on which the Common Stock is
         then traded) has exceeded the  Specified  Price (as defined  below) per
         share for 20 consecutive trading days (which 20 days may commence prior
         to February 11, 2000);  provided,  however,  that the  Specified  Price
         shall  initially be $40.00 but the  Specified  Price shall be adjusted,
         from  time to time  upon the  occurrence  of each  event  requiring  an
         adjustment  under  Section 4, in the same  relative  proportion  as the
         number of Warrant  Shares  issuable  upon  exercise of this  Warrant is
         adjusted under Section 4;

                  (ii) the  Company  notifies  the holders of the Warrant of its
         election to change the Expiration  Date and of the new Expiration  Date
         (which shall not be earlier than the  fifteenth  Business Day following
         the date of such notice);

                  (iii) the  notice  described  in clause  (ii) is given  within
         three  Business  Days of a period when the  condition  in clause (i) is
         satisfied; and

                  (iv) during the 20  consecutive  Trading Days prior to the new
         Expiration Date, the exercise of this Warrant and resale of the Warrant
         Shares  issued upon such  exercise  does not require the  delivery of a
         statutory  prospectus  under the Securities Act or, if it does,  such a
         prospectus is available therefor.

                  3.  Certain Agreements of the Company.  The Company hereby
covenants and agrees as follows:

                  (a) Shares to be Fully  Paid.  All  Warrant  Shares  will upon
issuance in accordance with the terms of this Warrant, be validly issued,  fully
paid,  and   non-assessable  and  free  from  all  taxes,   liens,   claims  and
encumbrances.

                  (b)  Reservation  of Shares.  During the Warrant  Period,  the
Company  shall at all times have  authorized,  and  reserved  for the purpose of
issuance upon exercise of this Warrant,  a sufficient number of shares of Common
Stock to provide for the exercise of this Warrant.

                  (c) Listing.  The Company shall promptly secure the listing of
the shares of Common  Stock  issuable  upon  exercise of this  Warrant upon each
national  securities  exchange or automated quotation system, if any, upon which
shares of Common Stock are then listed or become listed


<PAGE>



(subject to official notice of issuance upon exercise of this Warrant) and shall
maintain,  so long as any other shares of Common Stock shall be so listed,  such
listing  of all  shares of Common  Stock  from  time to time  issuable  upon the
exercise  of  this  Warrant;  and the  Company  shall  so list on each  national
securities exchange or automated quotation system, as the case may be, and shall
maintain  such  listing  of, any other  shares of capital  stock of the  Company
issuable  upon the  exercise of this Warrant if and so long as any shares of the
same class shall be listed on such  national  securities  exchange or  automated
quotation system.

     (d) Certain Actions  Prohibited.  The Company will not, by amendment of its
charter or  through a  reorganiza-  tion,  transfer  of  assets,  consolidation,
merger,  dissolu- tion,  issuance or sale of securities,  or any other voluntary
action, avoid or seek to avoid the observance or performance of any of the terms
to be observed or  performed  by it here-  under,  but will at all times in good
faith assist in the carrying  out of all the  provisions  of this Warrant and in
the taking of all such action as may  reasonably  be  requested by the holder of
this  Warrant in order to protect the  exercise  privilege of the holder of this
Warrant  against  dilution or other  impairment,  consistent  with the tenor and
purpose of this Warrant.  Without limiting the generality of the foregoing,  the
Company  (i) will not  increase  the par value of any  shares  of  Common  Stock
receivable  upon the exercise of this Warrant  above the Exercise  Price then in
effect and (ii) will take all such actions as may be necessary or appropriate in
order  that  the  Company   may  validly  and  legally   issue  fully  paid  and
non-assessable shares of Common Stock upon the exercise of this Warrant.

                  (e) Successors and Assigns.  This Warrant will be binding upon
any entity succeeding to the Company by merger or consolidation.

                  4.  Antidilution  Provisions.  During the Warrant Period,  the
Exercise Price and the number of Warrant  Shares  issuable upon exercise of this
Warrant  shall be subject to  adjustment  from time to time as  provided in this
Section 4.

     (a) Changes in Common Stock.  In the event that at any time or from time to
time the Company shall (i) pay a dividend or make a  distribution  on its Common
Stock in shares of its Common Stock (ii)  subdivide  its  outstanding  shares of
Common Stock into a larger number of shares of Common  Stock,  (iii) combine its
outstanding  shares of Common  Stock  into a smaller  number of shares of Common
Stock or (iv)  increase  or  decrease  the  number of  shares  of  Common  Stock
outstanding by  reclassification  of its Common Stock, then the number of shares
of Common Stock  issuable  upon exercise of each Warrant  immediately  after the
happening of such event shall be adjusted to a number  determined by multiplying
the number of shares of Common  Stock that such holder  would have owned or have
been  entitled  to  receive  upon  exercise  had such  Warrants  been  exercised
immediately  prior to the  happening of the events  described  above (or, in the
case of a dividend or  distribution  of Common  Stock  immediately  prior to the
record date therefor) by a


<PAGE>



fraction,  the  numerator of which shall be the total number of shares of Common
Stock outstanding immediately after the happening of the events described above,
and the denominator of which shall be the total number of shares of Common Stock
outstanding  immediately  prior to the happening of the events  described above;
and  subject  to  Section  4(g) the  Exercise  Price for each  Warrant  shall be
adjusted to a number determined by dividing the Exercise Price immediately prior
to such event by such fraction. An adjustment made pursuant to this Section 4(a)
shall  become  effective  immediately  after the  effective  date of such event,
retroactive  to the record date  therefor in the case of a dividend or distribu-
tion in shares of Common Stock or other shares of the
Company's capital stock.

     (b) Cash Dividends and Other  Distributions.  In the event that at any time
or from time to time the Company shall distribute to all holders of Common Stock
(i) any dividend or other  distribution of cash,  evidences of its indebtedness,
shares of its capital  stock or any other  properties  or securities or (ii) any
options,  warrants  or other  rights to  subscribe  for or  purchase  any of the
foregoing  (other  than,  in each case,  (w) the  issuance of any rights under a
shareholder  rights plan, (x) any dividend or distribution  described in Section
4(a), (y) any rights, options,  warrants or securities described in Section 4(c)
and (z) any cash dividends or other cash  distributions from current or retained
earnings),  then the number of shares of Common Stock issuable upon the exercise
of each Warrant  shall be increased to a number  determined by  multiplying  the
number of shares of Common  Stock  issuable  upon the  exercise of such  Warrant
immediately  prior to the record date for any such dividend or distribution by a
fraction,  the  numerator  of  which  shall  be the  Current  Market  Value  (as
hereinafter  defined)  per share of  Common  Stock on the  record  date for such
dividend or  distribution,  and the  denominator  of which shall be such Current
Market Value per share of Common  Stock on the record date for such  dividend or
distribution  less the sum of (x) the amount of cash,  if any,  distributed  per
share of Common Stock and (y) the fair value (as determined in good faith by the
Board  of  Directors,   whose  determination  shall  be  evidenced  by  a  board
resolution,  a copy  of  which  will be sent to the  holders  of  Warrants  upon
request) of the portion, if any, of the distribution  applicable to one share of
Common  Stock  consisting  of  evidences  of  indebtedness,   shares  of  stock,
securities,  other  property,  warrants,  options or  subscription  or  purchase
rights;  and subject to Section 4(g) the  Exercise  Price shall be adjusted to a
number  determined  by dividing the  Exercise  Price  immediately  prior to such
record date by the above fraction.  Such adjustments  shall be made whenever any
distribution is made and shall become  effective as of the date of distribution,
retroactive to the record date for any such distribution. Except as set forth in
Section 4(f),  no  adjustment  shall be made pursuant to this Section 4(b) which
shall  have the  effect of  decreasing  the  number  of  shares of Common  Stock
issuable upon exercise of each Warrant or increasing the Exercise Price.



<PAGE>



     (c)  Rights  Issue.  In the event that at any time or from time to time the
Company shall issue rights, options or warrants entitling the holders thereof to
subscribe  for  shares  of  Common  Stock,  or  securities  convertible  into or
exchangeable  or  exercisable  for Common  Stock to all holders of Common  Stock
(other than in connection with the adoption of a shareholder  rights plan by the
Company) without any charge, entitling such holders to subscribe for or purchase
shares of Common  Stock at a price per share that as of the record date for such
issuance is less than the then Current  Market Value per share of Common  Stock,
the number of shares of Common Stock  issuable upon the exercise of each Warrant
shall be increased to a number determined by multiplying the number of shares of
Common Stock  theretofore  issuable upon exercise of each Warrant by a fraction,
the  numerator  of which  shall be the  number of shares  of Common  Stock  out-
standing on the date of issuance of such rights, options, warrants or securities
plus the number of additional shares of Common Stock offered for subscription or
purchase or into or for which such securities that are issued are conver- tible,
exchangeable or exercisable, and the denominator of which shall be the number of
shares of Common  Stock out-  standing on the date of  issuance of such  rights,
options,  warrants or securities plus the total number of shares of Common Stock
which  the  aggregate  consideration  expected  to be  received  by the  Company
(assuming the exercise or conver- sion of all such rights, options,  warrants or
securities)  would purchase at the then Current Market Value per share of Common
Stock.  Subject  to  Section  4(g),  in the  event of any such  adjustment,  the
Exercise Price shall be adjusted to a number determined by dividing the Exercise
Price  immediately  prior to such date of issuance by the  aforementioned  frac-
tion. Such adjustment  shall be made immediately  after such rights,  options or
warrants are issued and shall become  effective,  retroactive to the record date
for the  determina-  tion of  stockholders  entitled  to  receive  such  rights,
options,  warrants  or  securities.  Except as set  forth in  Section  4(f),  no
adjustment  shall be made  pursuant  to this  Section  4(c) which shall have the
effect of  decreasing  the  number of shares of Common  Stock  purchasable  upon
exercise of each Warrant or of increasing the Exercise Price.

     (d)  Combination;  Liquidation.  (i) Except as provided in Section 4(d)(ii)
below,  in the event of a  Combination  (as defined  below),  each holder of the
Warrants  shall have the right to receive  upon  exercise  of the War- rants the
kind and amount of shares of capital stock or other securities or property which
such  holder  would have been  entitled  to receive  upon or as a result of such
Combination  had such Warrant been  exercised  immediately  prior to such event.
Unless paragraph (ii) is applicable to a Combination,  the Company shall provide
that the  surviving  or  acquiring  Person  (the  "Successor  Company")  in such
Combination  will  assume by written  instrument  the  obliga-  tions under this
Section 4 and the  obligations  to deliver to the  holder of this  Warrant  such
shares of stock,  securities  or assets  as, in  accordance  with the  foregoing
provisions,  the holder may be  entitled  to  acquire.  The  provisions  of this
Section 4(d)(i) shall similarly apply to successive  Combinations  involving any
Successor Company. "Combination"


<PAGE>



means an event in which the Company  consolidates  with, merges with or into, or
sells all or substantially  all of its assets to another Person,  where "Person"
means any individual, corporation, partnership, joint venture, limited liability
company,  association,  joint-stock company, trust, unincorporated organization,
government or any agency or political subdivision thereof or any other entity.

     (ii) In the event of (x) a Combination  where  consideration to the holders
of Common Stock in exchange  for their  shares is payable  solely in cash or (y)
the dissolu- tion,  liquidation or winding-up of the Company, the holders of the
Warrants  shall be  entitled  to  receive,  upon  surrender  of their  Warrants,
distributions  on an equal  basis  with the  holders  of  Common  Stock or other
securities  issuable upon exercise of the Warrants,  as if the Warrants had been
exercised  immediately  prior to such event, less the Exercise Price. In case of
any Combination  described in this Section 4(d)(ii),  the surviving or acquiring
Person and, in the event of any  dissolution,  liquidation  or winding-up of the
Company,  the Company,  shall deposit  promptly with an agent or trustee for the
benefit of the holders of the  Warrants the funds,  if any,  necessary to pay to
the holders of the  Warrants the amounts to which they are entitled as described
above. After such funds and the surrendered  Warrants are received,  the Company
is required to deliver a check in such amount as is appropriate (or, in the case
of consideration other than cash, such other consideration as is appropriate) to
such  Person  or  Persons  as it may  be  directed  in  writing  by the  holders
surrendering such Warrants.

                  (e)  Other  Events.  If  any  event  occurs  as to  which  the
foregoing  provisions  of this  Section  4 are not  strictly  applicable  or, if
strictly  applicable,  would  not,  in the good faith  judgment  of the Board of
Directors,  fairly and adequately protect the purchase rights of the Warrants in
accordance  with the essential  intent and principles of such  provisions,  then
such Board shall make such adjustments in the application of such provisions, in
accordance  with such essential  intent and  principles,  as shall be reasonably
necessary, in the good faith opinion of such Board of Directors, to protect such
purchase rights as aforesaid, but in no event shall any such adjustment have the
effect of increasing  the Exercise  Price or decreasing  the number of shares of
Common Stock issuable upon exercise of any Warrant.

                  (f) Superseding Adjustment. Upon the expiration of any rights,
options,  warrants  or  conversion  or  exchange  privileges  which  resulted in
adjustments  pursuant  to this  Section  4, if any  thereof  shall not have been
exercised,  the number of Warrant  Shares  issuable  upon the  exercise  of each
Warrant shall be readjusted  pursuant to the applicable  section of Section 4 as
if (i) the only shares of Common Stock  issuable  upon  exercise of such rights,
options,  warrants,  conversion or exchange privileges were the shares of Common
Stock,  if any,  actually  issued  upon the  exercise of such  rights,  options,
warrants or  conversion or exchange  privileges  and (ii) shares of Common Stock
actually issued,


<PAGE>



if any, were  issuable for the  consideration  actually  received by the Company
upon such exercise plus the aggregate  consideration,  if any, actually received
by the  Company for the  issuance,  sale or grant of all such  rights,  options,
warrants or conversion or exchange  privileges  whether or not exercised and the
Exercise Price shall be readjusted  inversely;  provided,  however, that no such
readjustment  shall have the effect of decreasing  the number of Warrant  Shares
purchasable  upon the exercise of each Warrant or increasing  the Exercise Price
by an amount in excess of the amount of the adjustment initially made in respect
of the issuance, sale or grant of such rights,  options,  warrants or conversion
or exchange privileges.

                  (g)  Minimum  Adjustment.  The  adjustments  required  by  the
preceding  Sections of this Section 4 shall be made whenever and as often as any
specified event requiring an adjustment  shall occur,  except that no adjustment
of the  Exercise  Price or the number of shares of Common  Stock  issuable  upon
exercise of Warrants that would  otherwise be required  shall be made unless and
until such adjustment  either by itself or with other adjustments not previously
made  increases or decreases by at least 1% the Exercise  Price or the number of
shares of Common Stock issuable upon exercise of the Warrants  immediately prior
to the making of such adjustment.  Any adjustment  representing a change of less
than such  minimum  amount  shall be  carried  forward  and made as soon as such
adjustment, together with other adjustments  required by this  Section 4 and not
previously  made,  would result in a minimum adjustment. For the purpose of any
adjustment, any specified event shall be deemed to have occurred  at the  close 
of  business on the date of its occurrence. In computing adjustments under this
Section 4, fractional interests in Common  Stock shall be taken into account to 
the nearest  one-hundredth  of a share (but,  upon exercise,  the Company shall
round to the nearest whole number of shares)and any  adjustments to the Exercise
Price resulting in a fraction of a cent shall be rounded to the nearest cent.

                  (h) Notice of  Adjustment.  Whenever the Exercise Price or the
number of shares of Common  Stock  and other  property,  if any,  issuable  upon
exercise of the  Warrants is adjusted,  as herein  provided,  the Company  shall
deliver  to  the  holders  of  the  Warrants  in  accordance  with  Section  9 a
certificate  of  the  Company's  Chief  Financial   Officer  setting  forth,  in
reasonable  detail,  the event  requiring the adjustment and the method by which
such  adjustment was  calculated  (including a description of the basis on which
(i) the  Board of  Directors  determined  the fair  value  of any  evidences  of
indebtedness,  other  securities  or  property  or  warrants,  options  or other
subscription  or purchase rights and (ii) the Current Market Value of the Common
Stock was  determined,  if either of such  determinations  were  required),  and
specifying  the Exercise Price and the number of shares of Common Stock issuable
upon exercise of Warrants after giving effect to such adjustment.

                  (i)      Notice of Certain Transactions.  In the event
that the Company shall propose (a) to pay any dividend


<PAGE>



payable in securities of any class to the holders of its Common Stock or to make
any other non-cash  dividend or distribution to the holders of its Common Stock,
(b) to offer the  holders  of its Common  Stock  rights to  subscribe  for or to
purchase  any  securities  convertible  into shares of Common Stock or shares of
stock of any class or any other securities, rights or options, (c) to effect any
capital reorganization,  reclassification, consolidation or merger affecting the
class of Common Stock, as a whole, or (d) to effect the voluntary or involuntary
dissolution, liquidation or winding-up of the Company, the Company shall, within
the time limits specified below, send to each holder of the Warrants a notice of
such proposed action or offer. Such notice shall be mailed to the holders of the
Warrants at their  addresses as they appear in the Warrant  Register (as defined
in Section  7(e)),  which shall specify the record date for the purposes of such
dividend,  distribution or rights, or the date such issuance or event is to take
place and the date of  participation  therein by the holders of Common Stock, if
any such date is to be fixed,  and shall  briefly  indicate  the  effect of such
action on the Common  Stock and on the  number  and kind of any other  shares of
stock and on other  property,  if any,  and the number of shares of Common Stock
and other  property,  if any,  issuable  upon  exercise of each  Warrant and the
Exercise Price after giving effect to any adjustment pursuant to Section 4 which
will be  required  as a result of such  action.  Such  notice  shall be given as
promptly as possible and (x) in the case of any action  covered by clause (a) or
(b) above, at least 10 days prior to the record date for determining  holders of
the Common  Stock for  purposes  of such  action or (y) in the case of any other
such action,  at least 20 days prior to the date of the taking of such  proposed
action or the date of  participation  therein by the  holders  of Common  Stock,
whichever shall be the earlier.

     (j) Adjustment to Warrant Certificate. The face of this Warrant need not be
changed  because  of any  adjust-  ment made  pursuant  to this  Section  4, and
Warrants  issued after such adjustment may state the same Exercise Price and the
same number of shares of Common Stock  issuable upon exercise of this Warrant as
are stated on the face of this Warrant  when  initially  issued  pursuant to the
Securities Purchase Agreement. The Company, however, may at any time in its sole
discretion  make  any  change  in the  form of  this  Warrant  that it may  deem
appropriate  to give  effect to such  adjustments  and that does not  affect the
substance of this Warrant,  and any Warrant  thereafter issued or countersigned,
whether in exchange or substitution for an outstanding Warrant or otherwise, may
be in the form as so changed.

                  (k) Current Market Value.  "Current Market Value" per share of
Common Stock or any other  security at any date means (i) if the security is not
registered under the Securities  Exchange Act of 1934, as amended (the "Exchange
Act"),  (a) the value of the security,  determined in good faith by the Board of
Directors  and  certified  in a board  resolution,  based on the  most  recently
completed  arm's-length  transaction between the Company and a Person other than
an affiliate of the Company or between any two


<PAGE>



such Persons and the closing of which occurs on such date or shall have occurred
within the six-month  period  preceding such date, or (b) if no such transaction
shall have occurred on such date or within such six-month  period,  the value of
the security as determined  by an  independent  financial  expert or (ii) if the
security is registered  under the Exchange Act, the average of the daily closing
bid prices (or the  equivalent in an  over-the-counter  market) for each Trading
Day during the period  commencing 10 Trading Days before such date and ending on
the date one day prior to such  date,  or if the  security  has been  registered
under the  Exchange  Act for less than 10  consecutive  Trading Days before such
date, the average of the daily closing bid prices (or such  equivalent)  for all
of the Trading  Days  before  such date for which  daily  closing bid prices are
available;  provided, however, that if the closing bid price is not determinable
for at least five Trading Days in such period, the "Current Market Value" of the
security,  shall be determined as if the security were not registered  under the
Exchange Act.

                  5. Issue Tax. The issuance of certificates  for Warrant Shares
upon the exercise of this Warrant shall be made without  charge to the holder of
this  Warrant or such  shares  for any  issuance  tax or other  costs in respect
thereof,  provided  that the Company  shall not be required to pay any tax which
may be payable in respect of any transfer  involved in the issuance and delivery
of any certificate in a name other than the holder of this Warrant.

     6. No Rights or  Liabilities  as  Shareholder.  The holders of  unexercised
Warrants  are not  entitled,  by  virtue  of  being  such  holders,  to  receive
dividends,  to vote, to receive notice of shareholders'  meetings or to exercise
any other rights whatsoever as shareholders of the Company. No provision of this
Warrant,  in the absence of affirmative  action by the holder hereof to exercise
this Warrant for Warrant Shares, and no mere enumeration herein of the rights or
privileges of the holder hereof, shall give rise to any liability of such holder
for  the  Exercise  Price  or as a  shareholder  of the  Company,  whether  such
liability is asserted by the Company or by creditors of the Company.

                  7.  Transfer, Exchange, and Replacement of Warrant.

     (a)  Restriction  on Transfer.  This Warrant and the rights  granted to the
holder  hereof are  transferable,  in whole or in part,  upon  surrender of this
Warrant,  together  with a properly  executed  assignment  in the form  attached
hereto,  at the office or agency of the  Company  referred  to in  Section  7(e)
below;  provided,  however,  that any transfer or assignment shall be subject to
the conditions  set forth in this Section 7 and to the applicable  provisions of
the Securities  Purchase  Agreement.  Until due presentment for  registration of
transfer  on the books of the  Company,  the  Company  may treat the  registered
holder hereof as the owner and holder  hereof for all purposes,  and the Company
shall not be affected by any notice to the contrary. Notwithstanding anything to
the contrary contained herein,


<PAGE>



the  registration  rights  described  in  Section  8 are  assign  able  only  in
accordance with the provisions of that certain  Registration  Rights  Agreement,
dated as of February 6, 1997, by and among the Company and the other signatories
thereto (the "Registration Rights Agreement").

     (b) Warrant  Exchangeable  for  Different  Denominations.  This  Warrant is
exchangeable,  upon the  surrender  hereof by the holder hereof at the office or
agency of the Company  referred to in Section  7(e) below,  for new  Warrants of
like tenor of different denominations representing in the aggregate the right to
purchase the number of shares of Common Stock which may be purchased  hereunder,
each of such new  Warrants to  represent  the right to  purchase  such number of
shares  as  shall  be  designated  by the  holder  hereof  at the  time  of such
surrender.

     (c)   Replacement   of  Warrant.   Upon  receipt  of  evidence   reasonably
satisfactory to the Company of the loss,  theft,  destruction,  or mutilation of
this  Warrant and, in the case of any such loss,  theft,  or  destruction,  upon
delivery of an indemnity agreement reasonably satisfactory in form and amount to
the  Company,  or,  in the  case of any  such  mutilation,  upon  surrender  and
cancellation  of this  Warrant,  the Company,  at its expense,  will execute and
deliver, in lieu thereof, a new Warrant of like tenor.

     (d) Cancellation;  Payment of Expenses.  Upon the surrender of this Warrant
in connection  with any transfer,  exchange or  replacement  as provided in this
Section 7, this Warrant shall be promptly  canceled by the Company.  The Company
shall  pay all  taxes  (other  than  securities  transfer  taxes)  and all other
expenses  (other  than  legal  expenses,  if  any,  incurred  by the  Holder  or
transferees) and charges payable in connection with the  preparation,  execution
and delivery of Warrants pursuant to this Section 7.

     (e) Warrant  Register.  The Company  shall  main-  tain,  at its  principal
executive  offices (or at the offices of the transfer  agent for the Warrants or
such other office or agency of the Company as it may  designate by notice to the
holder hereof), a register for this Warrant (the "Warrant  Register"),  in which
the Company  shall  record the name and address of the person in whose name this
Warrant has been issued,  as well as the name and address of each transferee and
each prior owner of this Warrant.

     (f)  Exercise  or  Transfer  Without  Registration.  If, at the time of the
surrender  of this  Warrant  in  connec-  tion with any  exercise,  transfer  or
exchange of this  Warrant,  this Warrant (or, in the case of any  exercise,  the
Warrant Shares issuable hereunder), shall not be registered under the Securities
Act and under  applicable  state  securities  or blue sky laws,  the Company may
require,  as a condition of allowing such  exercise,  transfer,  or exchange (i)
that the holder or transferee of this  Warrant,  as the case may be,  furnish to
the Company a written  opinion of counsel  (which  opinion and counsel  shall be
reasonably acceptable to the Company) to the effect that such exercise, transfer
or exchange may be made without registration under


<PAGE>



the Securities Act and under  applicable state securities or blue sky laws, (ii)
that the holder or  transferee  execute  and  deliver to the Company a letter in
form and  substance  acceptable  to the Company  stating that the  transferee is
acquiring this Warrant for investment  purposes only and not with a view towards
distribution  thereof and (iii) that the transferee be an "accredited  investor"
as  defined in Rule  501(a)  promulgated  under the  Securities  Act;  provided,
however,  that no such  opinion,  letter or status as an  "accredited  investor"
shall be required in connection  with a transfer  pursuant to Rule 144 under the
Securities Act (but such other customary  documentation  reasonably requested by
the Company shall be required).


     8.  Registration  Rights.  The holder of this  Warrant is  entitled  to the
benefit of such registration  rights in respect of the Warrant Shares as are set
forth in the Registration Rights Agreement.

                  9.  Notices.  Any notices  required or  permitted  to be given
under the terms of this Warrant  shall be sent by certified or  registered  mail
(return receipt requested) or delivered personally or by courier or by confirmed
telecopy,  and shall be  effective  three days after being placed in the mail if
mailed,  or upon receipt or refusal of receipt,  if delivered  personally  or by
courier or confirmed telecopy,  in each case addressed to a party. The addresses
for such communications shall be:

                               If to the Company:

                          WinStar Communications, Inc.
                                 230 Park Avenue
                               New York, NY 10169
                      Attn: Timothy Graham, Executive Vice
                          President and General Counsel
                            Telecopy: (212) 922-1637

                                 with a copy to:

                            Graubard Mollen & Miller
                                600 Third Avenue
                               New York, NY 10016
                          Attn: David Alan Miller, Esq.
                            Telecopy: (212) 687-6989

and if to the  holder,  at such  address as such holder  shall have  provided in
writing to the Company, or at such other address as each such party furnishes by
notice given in accordance with this Section 9.

                  10.  Governing  Law.  THIS  WARRANT  SHALL BE  GOVERNED BY AND
CONSTRUED AND ENFORCED IN ACCORDANCE  WITH THE INTERNAL LAWS OF THE STATE OF NEW
YORK WITHOUT REGARD TO THE BODY OF LAW CONTROLLING  CONFLICTS OF LAW. THE UNITED
STATES FEDERAL COURTS LOCATED IN NEW YORK CITY SHALL HAVE EXCLUSIVE JURISDICTION
WITH RESPECT TO ANY DISPUTE ARISING UNDER THIS WARRANT.



<PAGE>



                  11.  Certain Definitions.

                  "Business Day" means each day that is not a Saturday, a Sunday
or a day on which banking  institutions are not required to be open in the State
of New York.

                  "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  Securities
Exchange Act of 1934,  as amended  ("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 February 11, 1997  constitute  the Board of Directors of the
Corporation  (together  with any new  directors  whose  election by the Board of
Directors  of  the   Corporation  or  whose   nomination  for  election  by  the
Corporation's  stockholders was approved by a vote of at least two-thirds of the
members of the Board of Directors of the  Corporation  then in office who either
were members of the Board of Directors of the  Corporation  on February 11, 1997
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
of the Corporation then in office.

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

                  "Trading  Day"  means  any day on which  the  Common  Stock is
traded  for  any  period  on the  Nasdaq  National  Market  or on the  principal
securities  exchange  or other  securities  market on which the Common  Stock is
being traded.

                  12.  Miscellaneous.

     (a) Amendments.  This Warrant and any provision  hereof may only be amended
by an instrument in writing signed by the Company and the holder hereof.

     (b) Descriptive Headings.  The descriptive headings of the several Sections
of this Warrant are inserted for purposes of reference only and shall not affect
the meaning of construction of any of the provision hereof.

     (c) Cashless Exercise.  Notwithstanding  anything to the contrary contained
in this Warrant,  to the extent permitted by Section 1 hereof,  this Warrant may
be exercised by presentation and surrender of this Warrant to the Company at its
principal  executive offices with a written notice of the holder's  intention to
effect a cashless  exercise,  including a  calculation  of the number of Warrant
Shares  specified  by the holder as subject to such  cashless  exercise  and the
number of shares of Common stock to be issued upon such  exercise in  accordance
with the  terms  hereof (a  "Cashless  Exercise").  In the  event of a  Cashless
Exercise,  in lieu of paying the Exercise  Price in cash and issuing all Warrant
Shares  specified  by the holder as subject to such  exercise,  the holder shall
surrender this Warrant for that


<PAGE>



number of shares of Common Stock determined by multiplying the number of Warrant
Shares  specified  by the  holder as  subject  to such  Cashless  Exercise  by a
fraction,  the  numerator of which shall be the  difference  between the Current
Market  Value  per  share  of  Common  Stock  and the  Exercise  Price,  and the
denominator  of which  shall be the  Current  Market  Value  per share of Common
Stock.  If the holder at any time  effects a Cashless  Exercise  with respect to
less than all the  remaining  Warrant  Shares,  a new Warrant  representing  all
Warrant  Shares that have not been  specified  as subject to  exercise  shall be
issued.



                  IN WITNESS WHEREOF,  the Company has caused this Warrant to be
signed by its duly authorized officer.


                              WINSTAR COMMUNICATIONS, INC.



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





<PAGE>



                                                                  EXHIBIT 1
                                                               to the Warrant









                          FORM OF ELECTION TO PURCHASE

                          (To be Executed by the Holder
                        in order to exercise the Warrant)

                  The  undersigned  hereby  irrevocably  exercises  the right to
purchase _______ of the shares of Common Stock of WinStar Communications,  Inc.,
a Delaware  corporation (the "Company"),  evidenced by the attached Warrant, and
herewith  makes  payment of the  Exercise  Price with  respect to such shares in
full, all in accordance with the conditions and provisions of said Warrant.

         i. The Undersigned  agrees not to offer, sell,  transfer,  or otherwise
dispose of any Common Stock  obtained on exercise of the  Warrant,  except under
circumstances that will not result in a violation of the Securities Act of 1933,
as amended,  or any state  securities laws, and agrees that the following legend
may be affixed to the stock  certificate for the Common Stock hereby  subscribed
for if  resale  of such  Common  Stock is not  registered  or if Rule  144(k) is
unavailable:

                  THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE HAVE NOT BEEN
                  REGISTERED  UNDER THE  SECURITIES ACT OF 1933, AS AMENDED (THE
                  "SECURITIES  ACT").  THE  SECURITIES  HAVE BEEN  ACQUIRED  FOR
                  INVESTMENT PURPOSES ONLY AND MAY NOT BE OFFERED, SOLD, PLEDGED
                  OR OTHERWISE  TRANSFERRED  EXCEPT PURSUANT TO (A) AN EFFECTIVE
                  REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES
                  ACT AND ANY APPLICABLE STATE SECURITIES LAW, (B) AN OPINION OF
                  COUNSEL, IN FORM, SUBSTANCE AND SCOPE REASONABLY ACCEPTABLE TO
                  THE  COMPANY,  THAT  REGISTRATION  IS NOT  REQUIRED  UNDER THE
                  SECURITIES ACT OR ANY APPLICABLE  STATE  SECURITIES LAW OR (C)
                  RULE 144 UNDER THE SECURITIES ACT.

         ii. The undersigned requests that stock certificates for such shares be
issued,  and a Warrant  representing  any unexercised  portion hereof be issued,
pursuant  to the  Warrant  in  the  name  of the  Holder  and  delivered  to the
undersigned at the address set forth below:


Dated:_______________                       -------------------------
                                            Signature of Holder

                                            --------------------------
                                            Name of Holder (Print)


                                            Address:

                                            ==========================
                                            ==========================
                                            ==========================

<PAGE>




                          WinStar Communications, Inc.

                  6% Cumulative Convertible Preferred Stock and
                        Warrants to Purchase Common Stock


                          REGISTRATION RIGHTS AGREEMENT


                                                          February 6, 1997

The Purchasers
c/o Credit Suisse First Boston Corporation
    Eleven Madison Avenue
    New York, New York  10010

Ladies and Gentlemen:

                  WinStar  Communications,  Inc.,  a Delaware  corporation  (the
"Company"), proposes to issue and sell to Credit Suisse First Boston Corporation
and such  other  purchasers  as are set  forth  on the  signature  pages  hereto
(collectively,  the  "Purchasers"),  upon the terms  set  forth in a  securities
purchase agreement of even date herewith (the "Purchase  Agreement"),  shares of
6% Series A Cumulative Convertible Preferred Stock (the "Preferred Stock", which
term includes any Other Shares (as defined herein) and any Additional Shares (as
defined in the Certificate of Designation with respect to the Preferred  Stock))
of the Company and Warrants (the "Warrants") to purchase shares of Common Stock,
par value $0.01 per share,  of the Company (the "Common  Stock").  The Preferred
Stock  will be  issued to the  Purchasers  upon the  terms  and  subject  to the
limitations set forth in the Certificate of Designations, Rights and Preferences
of such Preferred Stock (the "Certificate of Designation").  As an inducement to
the  Purchasers to enter into the Purchase  Agreement and in  satisfaction  of a
condition to the Purchasers' obligations thereunder, the Company agrees with the
Purchasers,  (i) for the benefit of the  Purchasers  and (ii) for the benefit of
the registered holders of the Preferred Stock and the Common Stock issuable upon
conversion  of, or  pursuant  to a Change of  Control  Offer (as  defined in the
Certificate  of   Designation)   with  respect  to,  the  Preferred  Stock  (the
"Conversion  Shares")  and for the  benefit  of the  registered  holders  of the
Warrants  and the Common  Stock  issuable  upon  exercise of the  Warrants  (the
"Warrant  Shares" and,  collectively  with the  aforementioned  securities,  the
"Securities") from time to time until such time as such


<PAGE>


                                                                                


Securities  have been sold  pursuant  to a  Registration  Statement  (as defined
below)  (each of the  foregoing a "Holder" and  together  the  "Holders")  or as
otherwise set forth herein, as follows:

                  1.   Filing   of   Registration   Statements.    (a)   Initial
Registration. Following the Closing Date, the Company shall, at its own cost, be
required  to use its best  reasonable  efforts to file with the  Securities  and
Exchange Commission (the "Commission"), promptly, and to have declared effective
by August 15, 1997 (i) a registration statement covering the resale of shares of
Preferred Stock from time to time (the "Preferred Stock Registration Statement")
and (ii) a registration  statement covering the resale of the Warrants from time
to time and the issuance of Warrant  Shares as such Warrants are exercised  from
time  to  time  (the  "Warrant  Registration   Statement").   In  the  Company's
discretion,   the  Preferred  Stock  Registration   Statement  and  the  Warrant
Registration Statement may be combined into one Registration Statement.

                  (b) Demand Registration.  At any time after May 11, 1997, each
Holder of the Preferred Stock shall have the right, upon written demand given to
the Company  (the  "Demand  Notice"),  to request  the Company to register  such
Holder's  Conversion Shares other than Conversion  Shares  underlying  Preferred
Stock which has been sold by means of the Preferred Stock Registration Statement
("Registered  Preferred  Stock").  Upon receipt of a Demand Notice,  the Company
shall, at its cost and within 30 days,  prepare and file with the Commission and
thereafter  shall use its best efforts to cause to be declared  effective within
90 days  following the date of such Demand Notice,  a registration  statement (a
"Common Stock  Registration  Statement")  covering the resale of the  Conversion
Shares  by such  Holder  from time to time in  accordance  with the  methods  of
distribution set forth in the Common Stock  Registration  Statement and Rule 415
under the Securities Act of 1933, as amended (the  "Securities  Act"). Not later
than 30  days  prior  to the  effectiveness  of any  Common  Stock  Registration
Statement,  the Company  will notify the Holders of the  Preferred  Stock of the
pending Registration  Statement and will include in such Registration  Statement
the shares of Preferred  Stock of each Holder who elects to join therein  within
10 days by  motion  to the  Company.  Notwithstanding  anything  else  contained
herein,  the Company  will not be  obligated  to file more than two Common Stock
Registration Statements.



<PAGE>


                                                                                


                  (c)  Maintain  Effectiveness.  The Company  shall use its best
efforts  to  keep  the  Preferred  Stock  Registration  Statement,  the  Warrant
Registration  Statement and the Common Stock  Registration  Statement  (each,  a
"Registration  Statement",  and,  collectively,  the "Registration  Statements")
continuously  effective,  in order to permit the prospectus  included in each of
the Registration Statements to be lawfully delivered by or to the Holders of the
relevant  Securities,  until  such  time as all the  Securities  covered  by the
Registration  Statements have been sold pursuant  thereto or may be sold without
limitation  pursuant to Rule 144 under the Securities Act (or any successor rule
thereof),  assuming for this purpose that the Holders thereof are not affiliates
of the Company (in any such case,  such period  being  called the  "Registration
Period");  provided,  however,  that no Holder (other than a Purchaser) shall be
entitled  to  have  the  Securities  held  by it  covered  by  such  any  of the
Registration  Statements unless such Holder agrees in writing to be bound by all
the provisions of this Agreement applicable to such Holder. The Company shall be
deemed  not to have  used  its  best  efforts  to keep  any of the  Registration
Statements  effective  during the requisite  period if it voluntarily  takes any
action that would result in Holders of Securities covered thereby not being able
to offer and sell such Securities during that period,  unless (i) such action is
required by applicable law or (ii) upon the occurrence of any event contemplated
by paragraph  2(b)(iv) below,  such action is taken by the Company in good faith
and for valid business reasons and the Company thereafter promptly complies with
the  requirements  of paragraph 2(h) below if the Company has determined in good
faith that there are no material legal or commercial impediments in so doing.

                  (d)  Comply   with  SEC  Rules.   Notwithstanding   any  other
provisions  of this  Agreement to the  contrary,  the Company shall cause (other
than with respect to information  required to be supplied by the selling Holders
pursuant to this  Agreement)  (i) each of the  Registration  Statements  and the
prospectus  related thereto and any amendment or supplement thereto to comply in
all material respects with the applicable requirements of the Securities Act and
the  rules  and  regulations  of the  Commission  thereunder,  (ii)  each of the
Registration  Statements  and any  amendment  thereto  not to  contain,  when it
becomes  effective,  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


<PAGE>


                                                                                


forming  a part of any of the  Registration  Statements,  and any  amendment  or
supplement to such prospectus, not to contain, as of the date of such prospectus
or amendment or supplement,  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.

                  2.   Registration   Procedures.   In   connection   with   the
Registration   Statements   contemplated  by  Section  1  hereof  the  following
provisions shall apply to each of the Registration Statements:

                  (a) The Company shall (i) furnish to each Purchaser,  prior to
the filing thereof with the Commission, a copy of the Registration Statement and
each  amendment  thereof  and  each  amendment  or  supplement,  if any,  to the
prospectus  included therein and, in the event that a Purchaser (with respect to
any portion of an unsold allotment from the original  offering) is participating
in the Registration  Statement,  shall consider in good faith reflecting in each
such  document,  when so  filed  with  the  Commission,  such  comments  as such
Purchaser  reasonably may propose through  Designated Counsel and (ii) from time
to time  include  the  names of the  Holders,  who  propose  to sell  Securities
pursuant to such Registration Statement, as selling security holders.

                  (b) The Company  shall give written  notice to the  Purchasers
and the Holders  (which  notice  pursuant to clauses  (ii)-(iv)  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 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;

     (iii)  of  the  receipt  by  the  Company  or  its  legal  counsel  of  any
notification with respect to the suspension of the


<PAGE>


                                                                                


qualification  of the Securities for sale in any  jurisdiction or the initiation
or threatening of any proceeding for such purpose; and

     (iv) of the  happening  of any event  that the  Company  has in good  faith
determined  requires it to make  changes in the  Registration  Statement  or the
prospectus  in order that the  Registration  Statement or the  prospectus do 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, which written notice need not provide any detail as to the
nature of such event.

                  (c) The Company  shall use  reasonable  commercial  efforts to
obtain the withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Registration Statement.

                  (d) The Company  shall  furnish to each  Holder of  Securities
included within the coverage of the  Registration,  without charge,  one copy of
the Registration Statement and any post-effective  amendment thereto,  including
financial  statements and schedules,  and, if the Holder so requests in writing,
all exhibits thereto (other than those, if any, incorporated by reference).

                  (e) The Company shall, during the Registration Period, deliver
to each Holder of Securities  included  within the coverage of the  Registration
Statement,  without  charge,  as many copies of the prospectus  (including  each
preliminary prospectus) included in the Registration Statement and any amendment
or  supplement  thereto  as such  Holder may  reasonably  request.  The  Company
consents,  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
in  connection  with the  offering  and sale of the  Securities  covered  by the
prospectus, or any amendment or supplement thereto, included in the Registration
Statement.

                  (f) Prior to any public offering of the  Securities,  pursuant
to the  Registration  Statement,  the  Company  shall  register  or  qualify  or
cooperate  with  the  Holders  of the  Securities  included  therein  and  their
respective counsel in


<PAGE>


                                                                                


connection with the  registration or  qualification of such Securities for offer
and sale under the  securities  or "blue sky" laws of such  states of the United
States as any such  Holder  reasonably  requests  in writing  and do any and all
other acts or things  reasonably  necessary or advisable to enable the offer and
sale  in  such  jurisdictions  of the  Securities  covered  by the  Registration
Statement;  provided,  however,  that the  Company  shall not be required to (i)
qualify  generally  to do business in any  jurisdiction  where it is not then so
qualified or (ii) take any action which would  subject it to general  service of
process or to taxation in any jurisdiction where it is not then so subject.

                  (g) The  Company  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 the  Registration  Statements
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 the Registration Statements.

                  (h)  Upon  the  occurrence  of  any  event   contemplated   by
paragraphs  (ii)  through (iv) of Section 2(b) above during the period for which
the Company is required to maintain an  effective  Registration  Statement,  the
Company  shall  promptly  prepare  and  file  post-effective  amendments  to the
Registration  Statements or an amendment or supplement to the related prospectus
and any other  required  document  or file the  appropriate  document  under the
Exchange Act which is deemed to so amend or  supplement,  so that, as thereafter
delivered  to Holders 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
Company  notifies the  Purchasers or the Holders in accordance  with  paragraphs
(ii)  through  (iv) of Section  2(b) above to suspend the use of the  prospectus
until  the  requisite  changes  to the  prospectus  have  been  made,  then  the
Purchasers and the Holders shall immediately suspend use of such prospectus.

                  (i) The Company will comply with all rules and  regulations of
the  Commission  to the  extent  and so  long  as  they  are  applicable  to the
Registrations.



<PAGE>


                                                                                


                  (j) The Company may require  each Holder of  Securities  to be
sold  pursuant to the  Registration  Statements  to furnish to the Company  such
information  regarding the Holder and the  distribution of the Securities as the
Company  may  from  time  to  time  reasonably  require  for  inclusion  in  the
Registration Statements,  and the Company may exclude from such registration the
Securities  of any  Holder  that  fails to  furnish  such  information  within a
reasonable time after receiving such request.

                  (k) The  Company  shall  (i)  make  reasonably  available  for
inspection  by the Holders of the  Securities  and any  attorney,  accountant or
other agent retained by the Holders of the Securities all relevant financial and
other records,  pertinent  corporate documents and properties of the Company and
(ii)  cause  the  Company's  officers,  directors,  employees,  accountants  and
auditors to supply all relevant information  reasonably requested by the Holders
of the Securities or any such attorney, accountant or agent in connection with a
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 (i) shall be coordinated on behalf of the
Purchasers by Cravath, Swaine & Moore (the "Designated Counsel"), (ii) shall not
be available  for any such Holder that is a competitor  of the Company and (iii)
shall be maintained as  confidential  by the Holders and the Designated  Counsel
pursuant to customary confidentiality agreements.

                  (l) The Company, if requested by the Designated Counsel, shall
cause (i) its counsel to deliver an opinion and updates thereof  relating to the
Securities in customary form, including customary and reasonable qualifications,
assumptions and limitations,  addressed to such Holders,  and dated, in the case
of the initial opinion,  the effective date of such  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 Company and
its  subsidiaries;  the  qualification  of the Company and its  subsidiaries  to
transact business as foreign  corporations;  the due  authorization,  execution,
authentication  and  issuance,  and  the  validity  and  enforceability,  of the
applicable Securities; the absence of material legal or governmental proceedings


<PAGE>


                                                                                


involving  the  Company  and  its  subsidiaries;  the  absence  of  governmental
approvals required to be obtained in connection with the Registration Statement,
or the offering and sale of the applicable Securities; the compliance as to form
of such  Registration  Statement  and any  documents  incorporated  by reference
therein;  and, as of the date of the opinion and as of the effective date of the
Registration  Statement or most recent post-effective  amendment thereto, as the
case may be, the absence from such  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 any such
documents,  in the  light of the  circumstances  existing  at the time that such
documents  were filed with the Commission  under the Securities  Exchange Act of
1934, as amended (the "Exchange Act")), (ii) its officers to execute and deliver
all customary  documents and certificates  and updates thereof  requested by the
Designated  Counsel  and  (iii)  its  independent  public  accountants  and  the
independent  public  accountants  with  respect  to any other  entity  for which
financial  information is provided in the  Registration  Statement to provide to
the selling  Holders of the applicable  Securities 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.

                  (m) The Company  shall use  reasonable  commercial  efforts to
take all other steps  necessary  to effect the  registration  of the  Securities
covered by the Registration Statement contemplated hereby.

                  3. Registration  Expenses. The Company shall bear all fees and
expenses  incurred in connection with the  performance of its obligations  under
Sections  1  through  2  hereof,  whether  or not  the  applicable  Registration
Statement is filed or becomes effective, and shall bear or reimburse the Holders
of the Securities covered by such Registration Statement for the reasonable fees
and disbursements of the Designated Counsel (provided that Holders of Conversion
Shares issued upon the  conversion of the Preferred  Stock shall be deemed to be
Holders of the Preferred Stock from which such Conversion Shares were


<PAGE>


                                                                                


converted) to act as counsel for the Holders in connection
therewith.

                  4.  Indemnification.  (a) The Company  agrees to indemnify and
hold  harmless  each Holder and each person,  if any,  who controls  such Holder
within the meaning of the  Securities  Act or the  Exchange Act (each Holder 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 becomes  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 the
applicable   Registration  Statement  or  prospectus  or  in  any  amendment  or
supplement   thereto  or  in  any  preliminary   prospectus   relating  to  such
Registration  Statement,  or arise out of, 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 subject to
subsection (c) below, 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 Company 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 (x) the use of any  prospectus  in violation of the last
sentence  of  Section  2(h),  or (y) any  untrue  statement  or  alleged  untrue
statement or omission or alleged  omission made in the  applicable  Registration
Statement or  prospectus  or in any  amendment or  supplement  thereto or in any
preliminary  prospectus relating to such Registration Statement in reliance upon
and in  conformity  with  written  information  pertaining  to such  Holder  and
furnished  to the  Company  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 the applicable Registration  Statement,  the indemnity agreement contained in
this  subsection  (a) shall not inure to the benefit of any Holder from whom the
person asserting any such losses,  claims,  damages or liabilities purchased the
Securities


<PAGE>


                                                                                


concerned,  to the extent  that a  prospectus  relating to such  Securities  was
required to be delivered by such Holder under the  Securities  Act in connection
with such purchase and any such loss, claim,  damage or liability of such Holder
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 Company had previously  furnished  copies
thereof to such Holder; provided further, however, that this indemnity agreement
will be in addition to any  liability  which the Company may  otherwise  have to
such Indemnified Party.

     (b)  Each  Holder,  severally  and not  jointly,  will  indemnify  and hold
harmless  the Company and each person,  if any, who controls the Company  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  Company or any such  controlling  person  becomes  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 alleged
untrue  statement or omission was made in reliance upon and in  conformity  with
written information pertaining to such Holder and furnished to the Company by or
on behalf of such Holder specifically for inclusion therein; and, subject to the
limitation set forth  immediately  preceding this clause,  and to subsection (c)
below, shall reimburse, as incurred, the Company for any legal or other expenses
reasonably  incurred by the Company or any such controlling person in connection
with investigating or defending any loss, claim, damage,  liability or action in
respect thereof; provided, however, that no such Holder shall be required to pay
any amount  pursuant to this subsection (b) in excess of the amount by which the
net proceeds received by such Holder from the sale of the Securities pursuant to
the applicable  Registration  Statement exceeds the amount of damages which such
Holder has  otherwise  been  required to pay by reason of such untrue or alleged
untrue statement or omission or alleged omission. This


<PAGE>


                                                                                


indemnity  agreement will be in addition to any liability  which such Holder may
otherwise have to the Company or any of its controlling persons.

                  (c) Promptly after receipt by an indemnified  party under this
Section 4 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 4,
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 subsections (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  if the  representation  of both  such  parties  by the same
counsel  would  constitute  a conflict of  interest),  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  4 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 4 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


<PAGE>


                                                                                


to in subsections  (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 registration of the
Securities,  pursuant to the applicable  Registration  Statement, or (ii) if the
allocation  provided by the foregoing  clause (i) 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
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 Company
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 4(d),  no Holder shall be required to  contribute  any
amount in excess of the amount by which the net proceeds received by such Holder
from  the  sale  of  the  Securities  pursuant  to the  applicable  Registration
Statement  exceeds the amount of damages  which such Holder has  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 Company  within the meaning of
the  Securities  Act  or  the  Exchange  Act  shall  have  the  same  rights  to
contribution as the Company.


<PAGE>


                                                                                



                  (e) The  agreements  contained in this Section 4 shall survive
the sale of the Securities pursuant to the applicable 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.

                  5.  Registration Defaults.  (a)  The occurrence of any
of the following events constitutes a "Registration Default":

                  (i)  if  by  August  15,  1997  either  the  Preferred   Stock
         Registration  Statement or the Warrant  Registration  Statement has not
         been declared effective by the Commission;

                (ii) if on the date 90 days following the receipt by the Company
         of a Demand Notice, the applicable Common Stock Registration  Statement
         has not been declared effective by the Commission; or

              (iii) with respect to any of the Registration Statements, if after
         a Registration  Statement is declared  effective (A) such  Registration
         Statement  thereafter ceases to be effective;  or (B) such Registration
         Statement or the related  prospectus  ceases to be usable (in each case
         except as  permitted  in paragraph  (c) below) in  connection  with the
         issuance or resales of the  Securities  covered  thereby in  accordance
         with and 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.

                  (b)      Upon the occurrence of a Registration Default

                  (i) with respect to the Preferred Stock Registration Statement
or  the  Warrant  Registration  Statement,  the  dividend  rate  payable  on the
Preferred  Stock as set forth in Section 3(a) of the  Certificate of Designation
will increase to 6.5% until


<PAGE>


                                                                                


such time as the  Registration  Default  has been  cured  (or such  Registration
Statement is no longer  required to be effective  pursuant to the terms hereof);
and

                (ii) with respect to a Common Stock  Registration  Statement the
Company will be required to pay to the holders of the Preferred  Stock that gave
the Demand  Notice  with  respect  thereto or that  joined  therein  pursuant to
Section 1(b), on each share of Preferred  Stock then owned by such holder (other
than  Registered  Preferred  Stock),  an amount  equal to 2% of the  Liquidation
Preference of such Preferred Stock (as defined in the Certificate of Designation
with respect  thereto) (the  "Registration  Default  Amount"),  payable for each
month  during which there has  occurred a  Registration  Default for at least 15
days  until  such  time as such  Registration  Default  has been  cured (or such
Registration  Statement is no longer  required to be  effective  pursuant to the
terms  hereof).  With respect to each month for which the  Registration  Default
Amount is payable, such payment will be made within five business days following
the end of such month (i) by  certified  check or bank check or (ii) through the
issuance of a number of additional  shares (or  fractional  shares) of Preferred
Stock (the "Other Shares") equal to the  Registration  Default Amount divided by
the Stated  Value (as defined in the  Certificate  of  Designation  with respect
thereto)  of the  Preferred  Stock,  to the holders of  Preferred  Stock at such
address as appears for the holder on the record books of the Company (or at such
other  address as such  holder  shall  hereafter  give to the Company by written
notice).

                  (c) A Registration  Default  referred to in Section  5(a)(iii)
shall be deemed  not to have  occurred  and be  continuing  in  relation  to the
applicable  Registration  Statement  or  the  related  prospectus  if  (i)  such
Registration  Default  has  occurred  solely as a result of (x) the  filing of a
post-effective  amendment to such Registration  Statement to incorporate  annual
audited   financial   information   with  respect  to  the  Company  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) other  material  events,
with respect to the Company that would need to be described in such Registration
Statement  or the related  prospectus  and (ii) in the case of clause  (y),  the
Company  proceeds  promptly  and in good  faith  to  amend  or  supplement  such
Registration  Statement  and related  prospectus  to describe such events if the
Company has determined


<PAGE>


                                                                                


in good faith that there are no material  legal or commercial  impediments in so
doing;  provided,  however, that in any case if such Registration Default occurs
for a continuous  period in excess of 45 days, a  Registration  Default shall be
deemed to have occurred and the applicable dividend rate or Registration Default
Amount shall be payable in accordance  with the above  paragraph  following such
date.

                  (d) A  Registration  Default  with respect to the Common Stock
Registration Statement shall be deemed not to have occurred and be continuing if
(i) such  Registration  Default  consists  of the  failure of the  Common  Stock
Registration  Statement to be declared  effective by the  Commission  due to the
refusal  of the  Commission  to  allow  the  Company  to use  the  Common  Stock
Registration  Statement  for its  intended  purposes  and (ii) at such  time the
Preferred Stock Registration Statement is effective and there is no Registration
Default  referred to in Section  5(a)(iii)  with respect to the Preferred  Stock
Registration Statement; provided, however, if the failure described in cause (i)
continues  beyond  90 days,  a  Registration  Default  shall be  deemed  to have
occurred and the Registration Default Amount shall be payable in accordance with
paragraph (b) above following such date.

                  6. Rule 144.  The Company  shall use its best  efforts to file
the reports required to be filed by it under the Securities Act and the Exchange
Act in a timely  manner and, if at any time the Company is not  required to file
such  reports,  it will,  upon the  request  of any Holder of  Securities,  make
publicly  available  other  information  so long as necessary to permit sales of
their  securities  pursuant to Rule 144. The Company  covenants  that, if in the
event the Company is no longer  subject to Sections 13 or 15(d) of the  Exchange
Act and the  Securities  represent  more  than the  right to  receive  cash upon
exercise and conversion  thereof, it will take such further action as any Holder
of Securities may reasonably  request,  all to the extent  required from time to
time to enable such Holder to sell  Securities  without  registration  under the
Securities Act within the limitation of the exemptions provided by Rule 144. The
Company  will  provide a copy of this  Agreement to  prospective  purchasers  of
Securities   identified  to  the  Company  by  the   Purchasers   upon  request.
Notwithstanding  the  foregoing,  nothing  in this  Section 6 shall be deemed to
require the Company to register any of its  securities  pursuant to the Exchange
Act.


<PAGE>


                                                                                



     7.  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 Company
and upon the written consent of the Holders of a majority of shares of Preferred
Stock (provided that Holders of Conversion  Shares issued upon conversion of the
Preferred  Stock  shall be  deemed  to be  Holders  of the  number  of shares of
Preferred  Stock from which such Common  Stock was  converted)  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:

                  if to the Company, at its address as follows:

                          WinStar Communications, Inc.
                                 230 Park Avenue
                               New York, NY 10169
                             Fax No.: (212) 922-1637
                          Attention: Timothy R. Graham,
                            Executive Vice President

                                 with a copy to:

                            Graubard Mollen & Miller
                                600 Third Avenue
                               New York, NY 10116
                             Fax No.: (212) 687-6989
                       Attention: David Alan Miller, Esq.

             if to one of the Purchasers, at the addresses set forth
           on the applicable signature page of the Purchase Agreement;

                  All such  notices and  communications  shall be deemed to have
been duly given: at the time delivered by hand, if personally  delivered;  three
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>


                                                                                


                  (c) No Inconsistent Agreements;  Damages. The Company has not,
as of the date hereof,  entered into, nor shall it, on or after the date hereof,
enter into,  any  agreement  with respect to its  securities  that  violates the
rights granted to the Holders herein or otherwise  conflicts with the provisions
hereof. Notwithstanding anything to the contrary contained in this Agreement, it
is hereby  acknowledged  and agreed that the Company shall have no liability for
monetary  damages to the Purchasers or any Holder for any breaches,  failures to
comply  or  violations  by it of  Section  1 or 2 of this  Agreement  except  as
expressly  provided in Section 4 or 5 hereof;  provided,  however,  in the event
that the Company breaches, fails to comply or violates the provisions of Section
1 or 2 hereof,  the  Holders  shall be entitled  to, and the  Company  shall not
oppose the granting of,  equitable  relief,  including  injunction  and specific
performance.

                  (d) Successors and Assigns.  This Agreement shall inure to the
benefit  of and be  binding  upon  the  successors  and  assigns  of each of the
parties, including, without the need for an express assignment or any consent by
the Company thereto, subsequent Holders of Securities. The Company hereby agrees
to extend the  benefits of this  Agreement to any Holder of  Securities  and any
such Holder may  specifically  enforce the provisions of this Agreement as if an
original party hereto  subject to its  compliance  with the provision of Section
2(j).

                  (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.

                  By the execution and delivery of this  Agreement,  the Company
submits to the  nonexclusive  jurisdiction  of any federal or state court in the
State of New York.



<PAGE>


                                                                                


                  (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 Company.  Whenever the consent or
approval  of Holders of a  specified  percentage  of the  outstanding  shares of
Preferred  Stock is required  hereunder,  Preferred Stock held by the Company or
its  affiliates  (other  than  subsequent  Holders  of  Preferred  Stock if such
subsequent  Holders  are  deemed  to be  affiliates  solely  by  reason of their
holdings of such Preferred  Stock) shall not be counted in determining  whether
such consent or approval was given by the Holders of such required percentage.

<PAGE>

                  If the foregoing is in accordance with your  understanding  of
our  agreement,  please  sign and return to the  Company a  counterpart  hereof,
whereupon this instrument,  along with all  counterparts,  will become a binding
agreement  among the several  Purchasers and the Company in accordance  with its
terms.

                                                  Very truly yours,

                                                  WINSTAR COMMUNICATIONS, INC.


                                                  By: /s/
                                                     ---------------------
                                                Name:
                                               Title:



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



                                                CREDIT SUISSE FIRST BOSTON
                                                     CORPORATION

                                                   By: /s/
                                                      ----------------------
                                                 Name:
                                                Title:





<PAGE>


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