WINSTAR COMMUNICATIONS INC
8-K, 1997-03-27
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)         March 18, 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

                                Page 1 of 5 Pages


<PAGE>



Item 5.           Other Events.

                  Private Placement of Debt Securities

         On March 18, 1997, WinStar Communications, Inc. (the "Company") and its
wholly owned subsidiary, WinStar Equipment Corp. ("WEC"), issued an aggregate of
$300  million of notes in an  institutional  private  placement  (the "1997 Debt
Placement")  conducted  through  Credit Suisse First Boston  Corporation  and BT
Securities  Corporation,  the  initial  purchasers  of such notes (the  "Initial
Purchasers").  In addition,  in order to provide  additional future liquidity to
the Company,  the Company obtained a commitment for a $150 million facility from
affiliates of the Initial  Purchasers which,  subject to the Company  satisfying
various operating and financial  criteria,  may be drawn by the Company on March
31, 1999.

         The 1997 Debt Placement  consisted of (i) $100 million of the Company's
14.5% Senior Deferred Interest Notes due 2005 (the "New Senior Notes"),  ranking
pari passu with the Company's  existing  senior discount notes issued in October
1995 (the "Old Senior Notes"),  and (ii) $200 million of WEC's 12.5%  Guaranteed
Senior Secured Notes due 2004 (the "WEC Notes" and, together with the New Senior
Notes,  the "New  Notes").  The  obligations  of WEC  under  the WEC  Notes  are
unconditionally  guaranteed  by the  Company  and the WEC Notes are secured by a
security interest in the equipment and other property  purchased by WEC with the
proceeds thereof.

         Until  October 15,  2000,  interest on the New Senior Notes will accrue
and  compound  semiannually,  but will not be payable in cash.  Interest  on the
Accumulated  Amount (as defined in the New Indentures  referred to below) of the
New Senior Notes as of October 15, 2000 will be payable  semiannually in cash on
April 15 and  October 15 of each year  commencing  April 15,  2001  until  final
maturity  of the  New  Senior  Notes.  Interest  on the  WEC  Notes  is  payable
semiannually on September 15 and March 15 of each year, commencing September 15,
1997, until final maturity of the WEC Notes.

         The  proceeds  of the New Senior  Notes will be used by the Company for
working   capital   purposes   in  the   development   and   expansion   of  its
telecommunications and other business operations.  The proceeds of the WEC Notes
must be used  by WEC to  acquire  telecommunications  equipment,  inventory  and
related software and other property used in the telecommunications  business for
lease to the  Company's  operating  subsidiaries  and others and to pay  certain
costs,  including  installation  costs,  related thereto.  In the event the $200
million  proceeds  from the sale of the WEC Notes  have not been so  applied  by
March 18,  1999,  WEC is  required  to redeem  outstanding  WEC Notes  having an
aggregate principal amount equal to the amount of such unutilized proceeds,  pro
rata from the  holders  thereof,  at a price  equal to  112.5% of the  principal
amount thereof as of such date.

         Each of the New Senior Notes and the WEC Notes was issued  pursuant to,
and each is governed by, the terms of an indenture (the "New Indentures")  among
the  Company  (as issuer of the New  Senior  Notes and as  guarantor  of the WEC
Notes),  WEC (in the case of the WEC Notes only) and United States Trust Company
of New York,  as  trustee.  Under the New  Indentures,  the  Company and WEC are
subject to restrictions substantially similar to the restrictions on the Company
contained in the  indenture  between the Company and the trustee with respect to
the Old Senior Notes. Such restrictions include, among others, restrictions with
respect to the incurrence of additional  indebtedness,  the creation of liens or
encumbrances,  the making of certain restricted payments,  including investments
outside the Company's  telecommunications  operations,  and sales of assets,  in
each case,  of the  Company  and  certain of its  subsidiaries,  and  changes of
control of the Company.

         Upon  consummation  of the 1997 Debt  Placement,  the  Company  and WEC
entered  into  a  Registration   Rights  Agreement  (the  "Registration   Rights
Agreement")  which requires them to effect a registered  exchange offer pursuant
to which its  respective  New Notes may be exchanged by the holders  thereof for
notes (the "Exchange Notes") having terms substantially identical to such

                                        2

<PAGE>



exchanged New Notes (except with respect to transfer restrictions).  Each of the
Company  and WEC has  agreed to use its best  efforts  to have the  registration
statement in connection with such exchange offer filed by May 2, 1997,  declared
effective by the Securities and Exchange  Commission  ("SEC") by August 15, 1997
and to keep the  exchange  offer  open for not less  than 30 days (or  longer if
required by applicable  law) after the date that notice thereof is mailed to the
holders of the  respective  New Notes.  Each of the  Company and WEC has further
agreed, under certain circumstances,  including,  among others, their failure to
consummate  such  exchange  offer  by  September  15,  1997,  to  file  a  shelf
registration  statement (a "Shelf Registration  Statement")  covering resales of
the applicable New Notes or Exchange  Notes, as the case may be, and to keep the
Shelf  Registration  Statement  effective  until  the time when the New Notes or
Exchange  Notes  covered  thereby can be sold without an effective  registration
statement.  In  the  event  of a  default  by  the  Company  or  WEC  under  the
Registration  Rights Agreement,  interest will accrue on the applicable issue of
New Notes  and  Exchange  Notes  from and  including  the date on which any such
default  shall occur,  but excluding the date on which all defaults with respect
to such New Notes or Exchange Notes have been cured.  Such  additional  interest
will be payable in cash,  semiannually in arrears,  at a rate per annum equal to
 .50% of the principal amount of the applicable New Notes or Exchange Notes (plus
accrued interest in the case of the New Senior Notes).

         Except as  otherwise  described in the New  Indentures,  the New Senior
Notes are not redeemable prior to October 15, 2000.  Thereafter,  the New Senior
Notes will be redeemable,  at the Company's  option, in whole or in part, at the
following redemption prices (expressed as a percentage of the Accumulated Amount
of the New  Senior  Notes at the time of  redemption)  plus  accrued  and unpaid
interest on such Accumulated Amount, if any:


          Year                                         Redemption
                                                          Price
          -----                                        ----------

          2000                                          107.250%
          2001                                          104.833%
          2002                                          102.417%
          2003 and thereafter                           100.000%


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


          Year                                        Redemption
                                                         Price
          ----                                        ----------

          2002                                         106.250%
          2003                                         103.125%


         Pursuant to the New Indentures,  In the event of a change of control of
the Company, each of the Company and WEC must offer to purchase from the holders
thereof all of its  respective New Notes then  outstanding,  at a purchase price
equal to 101% of, in the case of the New Senior Notes, the Accumulated Amount of
such  New  Senior  Notes on the date of  purchase,  and,  in the case of the WEC
Notes, the principal amount of such WEC Notes,  plus, in each case,  accrued and
unpaid interest (if any) on such amount to the date of purchase.




                                        3

<PAGE>




                  Press Release

         The Company issued a press release  announcing the  consummation of the
1997 Debt Placement on March 18, 1997.

                                        4

<PAGE>



                                   SIGNATURES



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


Dated: March 27, 1997                           WINSTAR COMMUNICATIONS, INC.
                                                ----------------------------
                                                (Registrant)


                                                 /s/ Frederic E. von Strange
                                                ----------------------------
                                                Frederic E. von Strange
                                                Executive Vice President


                                        5

<PAGE>


                                  EXHIBIT INDEX


Exhibit Number    Description


    10.1          Purchase Agreement between the Company, WEC and the Initial
                  Purchasers, dated March 13, 1997
    10.2          Senior Deferred Interest Notes Indenture, including form of 
                  Senior Deferred Interest Note, dated March 1, 1997
    10.3          Guaranteed Senior Secured Notes Indenture, including form of
                  Guaranteed Senior Secured Note, dated March 1, 1997
    10.4          Registration Rights Agreement, dated March 13, 1997
    10.5          Security Agreement, dated March 1, 1997
    99.1          Press Release, dated March 18, 1997

                                        6

<PAGE>


                                                                  EXECUTION COPY

                                  $300,000,000

                          WINSTAR COMMUNICATIONS, INC.

          $100,000,000 14 1/2% Senior Deferred Interest Notes Due 2005

                             WINSTAR EQUIPMENT CORP.

          $200,000,000 12 1/2% Guaranteed Senior Secured Notes Due 2004

                               PURCHASE AGREEMENT

                                                                  March 13, 1997

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

Dear Sirs:

      1. Introductory. WinStar Communications, Inc., a Delaware corporation
("WinStar"), and WinStar Equipment Corp., a Delaware corporation ("WinStar
Equipment" and, together with WinStar, the "Issuers"), propose, subject to the
terms and conditions stated herein, to issue and sell to the several initial
purchasers named in Schedule A hereto (the "Purchasers") U.S.$100,000,000
principal amount of WinStar's 14 1/2% Senior Deferred Interest Notes Due 2005
(the "Senior Notes"); and U.S.$200,000,000 principal amount of WinStar
Equipment's 12 1/2% Guaranteed Senior Secured Notes Due 2004 (the "Equipment
Notes" and, together with the Senior Notes, the "Offered Securities"). The
Equipment Notes will be unconditionally guaranteed on a senior basis (the
"Equipment Note Guarantee") by WinStar (in such capacity, the "Guarantor"). Each
of the Senior Notes and the Equipment Notes will be issued under a separate
indenture, dated as of March 1, 1997 (each, an "Indenture" and together, the
"Indentures"), between WinStar or WinStar Equipment, as the case may be, the
Guarantor, in the case of the Indenture governing the Equipment Notes, and
United States Trust Company of New York, as Trustee. The United States
Securities Act of 1933 is herein referred to as the "Securities Act."

      Each of the Issuers hereby agrees with the several Purchasers as follows:

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

      (a) A preliminary offering circular and an offering circular relating to
the Offered Securities to be offered by the Purchasers have been prepared by the
Issuers. Such preliminary offering circular and offering circular, as both are
supplemented as of the date of this Agreement, together with any other document
approved by the Issuers for use in connection with the contemplated resale of
the Offered Securities are hereinafter collectively referred to as the "Offering
Document". On the date of this Agreement, the Offering Document does not include
any untrue statement of a material fact or omit to state any material fact
necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading. The preceding sentence
does not apply to statements in or omissions from the Offering Document based
upon written information furnished to the Issuers by any Purchaser through
Credit Suisse First Boston Corporation ("CSFBC") specifically for use therein,
it being understood and agreed that the only such information is that described
as such in Section 7(b). WinStar's Annual Report on Form 10-KSB most recently
filed with the Securities and Exchange Commission (the "Commission") and all
subsequent reports (collectively, the "Exchange Act Reports") which have been
filed by WinStar with the Commission or sent to stockholders pursuant to the
Securities Exchange Act of 1934 (the "Exchange Act"), when they were filed with
the Commission, conformed in all material respects to the requirements of the
Exchange Act and the rules and regulations of the Commission thereunder.
<PAGE>

                                                                               2
      (b) Each of the Issuers has been duly incorporated and is an existing
corporation in good standing under the laws of the State of Delaware, with
corporate power and authority to own its properties and conduct its business as
described in the Offering Document; and each of the Issuers is duly qualified to
do business as a foreign corporation in good standing in all other jurisdictions
in which its ownership or lease of property or the conduct of its business
requires such qualification, except to the extent that the failure to be so
qualified or be in good standing would not have a material adverse effect on the
condition (financial or other), business, properties or results of operations of
each of the Issuers and their respective subsidiaries, taken as a whole (a
"Material Adverse Effect"). WinStar is qualified to do business as a foreign
corporation in the State of New York. WinStar Equipment is qualified to do
business as a foreign corporation in the States of Nevada and New York.

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

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

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

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

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

      (h) This Agreement has been duly authorized, executed and delivered by
each of the Issuers.
<PAGE>
                                                                               3
      (i) Except as disclosed in the Offering Document, the Issuers and their
subsidiaries have good and marketable title to all real properties and all other
properties and assets owned by them, in each case free from liens, encumbrances
and defects that would materially affect the value thereof or materially
interfere with the use made or to be made thereof by them; and except as
disclosed in the Offering Document, the Issuers and their subsidiaries hold any
leased real or personal property under valid and enforceable leases with no
exceptions that would materially interfere with the use made or to be made
thereof by them.

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

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

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

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

      (n) Except as disclosed in the Offering Document, there are no pending
actions, suits or proceedings against or affecting the Issuers, any of their
subsidiaries or any of their respective properties that, individually or in the
aggregate, could reasonably be expected to have a Material Adverse Effect, or to
materially and adversely affect the ability of either of the Issuers to perform
its obligations under any of the Indentures, the Registration Rights Agreement
or this Agreement, or which are otherwise material in the context of the sale of
the Offered Securities; and to the Issuers' knowledge, no such actions, suits or
proceedings are threatened or contemplated.

      (o) The financial statements included in the Offering Document present
fairly the financial position of WinStar and its consolidated subsidiaries as of
the dates shown and their results of operations and cash flows for the periods
shown, and such financial statements have been prepared in conformity with
generally accepted accounting principles in the United States applied on a
consistent basis; and the assumptions used in preparing the pro forma financial
statements included in the Offering Document provide a reasonable basis for
presenting the significant effects directly attributable to the transactions or
events described therein, the related pro forma adjustments give appropriate
effect to those assumptions, and the pro forma columns therein reflect the
proper application of those adjustments to the corresponding historical
financial statement amounts.

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

                                                                               4
      (q) Neither of the Issuers is an open-end investment company, unit
investment trust or face-amount certificate company that is or is required to be
registered under Section 8 of the United States Investment Company Act of 1940
(the "Investment Company Act"), nor are either of them a closed-end investment
company required to be registered, but not registered, thereunder; and neither
of the Issuers is and, after giving effect to the offering and sale of the
Offered Securities and the application of the proceeds thereof as described in
the Offering Document, will be an "investment company" as defined in the
Investment Company Act.

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

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

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

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

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

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

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

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

      (z) The Issuers and their subsidiaries have duly filed in a timely manner
all material filings, reports, applications, documents, instruments and
information required to be filed by them under the Communications Act, and all
such filings are true, correct and complete in all material respects.
<PAGE>
                                                                               5

      (aa) Neither of the Issuers or any of their subsidiaries have any reason
to believe that any of the Licenses will not be renewed in the ordinary course.

      3. Purchase, Sale and Delivery of Offered Securities. On the basis of the
representations, warranties and agreements herein contained, but subject to the
terms and conditions herein set forth, the Issuers agree to sell to the
Purchasers, and the Purchasers agree, severally and not jointly, to purchase
from the Issuers, the respective principal amounts of Offered Securities set
forth opposite the names of the several Purchasers in Schedule A hereto, at a
purchase price of 96 1/2% of the principal amount thereof for Senior Notes, and
97% of the principal amount thereof for Equipment Notes, in each case plus
accrued interest (if any) from March 18, 1997 to the Closing Date (as
hereinafter defined).

            The Issuers will deliver against payment of the purchase price the
Offered Securities in the form of one or more permanent global securities in
definitive form (the "Global Securities") deposited with the Trustee as
custodian for The Depository Trust Company ("DTC") and registered in the name of
Cede & Co., as nominee for DTC. Interests in any permanent Global Securities
will be held only in book-entry form through DTC, except in the limited
circumstances described in the Offering Document. Payment for the Offered
Securities shall be made by the Purchasers in Federal (same day) funds by wire
transfer to an account previously designated to CSFBC by WinStar at a bank
acceptable to CSFBC, at the office of Cravath, Swaine & Moore, Worldwide Plaza,
825 Eighth Avenue, New York, N.Y. 10019-7475 at 10:00 A.M. (New York time), on
March 18, 1997, or at such other time not later than seven full business days
thereafter as CSFBC and the Issuers determine, such time being herein referred
to as the "Closing Date", against delivery to the Trustee as custodian for DTC
of the Global Securities representing all of the Offered Securities. The Global
Securities will be made available for checking at the offices of Cravath, Swaine
& Moore at least 24 hours prior to the Closing Date.

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

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

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

      "The Securities covered hereby have not been registered under the U.S.
      Securities Act of 1933 (the "Securities Act") and may not be offered or
      sold within the United States or to, or for the account or benefit of,
      U.S. persons (i) as part of their distribution at any time or (ii)
      otherwise until 40 days after the later of the date of the commencement of
      the offering and the closing date, except in either case in accordance
      with Regulation S (or Rule 144A if available) under the Securities Act."

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

      (c) Each Purchaser severally agrees that it and each of its affiliates has
not entered and will not enter into any contractual arrangement with respect to
the distribution of the Offered Securities except for any such arrangements with
the other Purchasers or affiliates of the other Purchasers or with the prior
written consent of the Issuers.
<PAGE>
                                                                               6

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

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

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

      5. Certain Agreements of the Issuers. The Issuers agree with the several
Purchasers that:

      (a) The Issuers will advise CSFBC promptly of any proposal to amend or
supplement the Offering Document and will not effect such amendment or
supplementation without CSFBC's consent (which consent shall not be unreasonably
withheld). If, at any time prior to the completion of the resale of the Offered
Securities by the Purchasers, any event occurs as a result of which the Offering
Document as then amended or supplemented would include an untrue statement of a
material fact or omit to state any material fact necessary in order to make the
statements therein, in the light of the circumstances under which they were
made, not misleading, or if it is necessary at any such time to amend or
supplement the Offering Document to comply with any applicable law, the Issuers
promptly will notify CSFBC of such event and promptly will prepare, at their own
expense, an amendment or supplement which will correct such statement or
omission or effect such compliance. Neither CSFBC's consent to, nor the
Purchasers' delivery to offerees or investors of, any such amendment or
supplement shall constitute a waiver of any of the conditions set forth in
Section 6.

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

      (c) The Issuers will use their best efforts to arrange for the
qualification of the Offered Securities for sale and the determination of their
eligibility for investment under the laws of such jurisdictions in the United
States and Canada as CSFBC reasonably designates and will continue such
qualifications in effect so long as required for the resale of the Offered
Securities by the Purchasers; provided, however, that the
<PAGE>
                                                                               7

Issuers will not be required to qualify as foreign corporations or to file a
general consent to service of process in any such state.

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

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

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

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

      (h) WinStar will pay all expenses incidental to the performance of the
Issuers' obligations under this Agreement and the Indentures, including (i) the
fees and expenses of the Trustee and its professional advisers; (ii) all
expenses in connection with the execution, issue, authentication, packaging and
initial delivery of the Offered Securities, the preparation and printing of this
Agreement, the Offered Securities, the Indentures, the Offering Document and
amendments and supplements thereto, and any other document relating to the
issuance, offer, sale and delivery of the Offered Securities; (iii) the cost of
qualifying the Offered Securities for trading in the Private Offerings, Resale
and Trading through Automated Linkages (PORTAL) market and any expenses
incidental thereto; (iv) the cost of any advertising approved by the Issuers in
connection with the issue of the Offered Securities; (v) any expenses (including
fees and disbursements of counsel) incurred in connection with qualification of
the Offered Securities for sale under the laws of such jurisdictions in the
United States and Canada as CSFBC designates and the printing of memoranda
relating thereto; (vi) any fees charged by investment rating agencies for the
rating of the Offered Securities; and (vii) all expenses incurred in
distributing preliminary offering circulars and the Offering Document (including
any amendments and supplements thereto) to the Purchasers. The Issuers will also
pay or reimburse the Purchasers (to the extent incurred by them) for all travel
expenses of the Issuers' officers and employees and any other expenses of the
Issuers in connection with attending or hosting meetings with prospective
purchasers of the Offered Securities from the Purchasers.

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

      (j) Prior to the Closing Date, the Issuers will not offer, sell, contract
to sell, pledge or otherwise dispose of, directly or indirectly, any United
States dollar-denominated debt securities issued or guaranteed by the Issuers
and having a maturity of more than one year from the date of issue, or publicly
disclose the intention to make any such offer, sale, pledge or disposal, without
the prior written consent of CSFBC. The Issuers will not at any time offer,
sell, contract to sell, pledge or otherwise dispose of, directly or indirectly,
any securities under circumstances where such offer, sale, pledge, contract or
disposition would cause the exemption afforded by Section 4(2) of the Securities
Act or the safe harbor of Regulation S thereunder to cease to be applicable to
the offer and sale of the Offered Securities.

      (k) The Issuers will cause each Offered Security to bear the legend set
forth in the form of Note attached as Exhibit 1 to the Rule 144A/Regulation S
Appendix to the relevant Indenture until such legend
<PAGE>
                                                                              8

shall no longer be necessary or advisable because the Offered Securities are no
longer subject to the restrictions on transfer described therein.

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

      6. Conditions of the Obligations of the Purchasers. The obligations of the
several Purchasers to purchase and pay for the Offered Securities will be
subject to the accuracy of the representations and warranties on the part of the
Issuers herein, to the accuracy of the statements of officers of the Issuers
made pursuant to the provisions hereof, to the performance by the Issuers of
their obligations hereunder and to the following additional conditions
precedent:

      (a) The Purchasers shall have received a letter, dated the date of this
Agreement, of Grant Thornton LLP, in agreed form, confirming that they are
independent public accountants within the meaning of the Securities Act and the
applicable published rules and regulations thereunder ("Rules and Regulations")
and stating to the effect that:

      (i) in their opinion the financial statements examined by them and
included in the Offering Document comply as to form in all material respects
with the applicable accounting requirements of the Securities Act and the
related published Rules and Regulations;

      (ii) on the basis of a reading of the latest available interim financial
statements of the Issuers, inquiries of certain officials of WinStar who have
responsibility for financial and accounting matters and other specified
procedures, nothing came to their attention that caused them to believe that:

            (A) at March 7, 1997, there was any change in the capital stock or
      paid-in capital, increase in long-term debt or any decreases in
      consolidated net current assets or stockholders' equity of the
      consolidated companies as compared with amounts shown on the December 31,
      1996 audited consolidated balance sheet included in the Offering Document;
      or

            (B) for the period from January 1, 1997 to March 7, 1997, there were
      any decreases, as compared with the corresponding period in the preceding
      year, in consolidated operating revenues or in the total or per-share
      amounts of net loss;

except in all cases set forth in clauses (A) and (B) above for changes,
increases or decreases which the Offering Document discloses have occurred or
may occur or which are described in such letter; and

      (iii) they have compared specified dollar amounts (or percentages derived
from such dollar amounts) and other financial information contained in the
Offering Document (in each case to the extent that such dollar amounts,
percentages and other financial information are derived from the general
accounting records of WinStar and its subsidiaries subject to the internal
controls of WinStar's accounting system or are derived directly from such
records by analysis or computation) with the results obtained from inquiries, a
reading of such general accounting records and other procedures specified in
such letter and have found such dollar amounts, percentages and other financial
information to be in agreement with such results, except as otherwise specified
in such letter.

      (b) Subsequent to the execution and delivery of this Agreement, there
shall not have occurred (i) a change in U.S. or international financial,
political or economic conditions or currency exchange rates or exchange controls
as would, in the judgment of CSFBC, be likely to prejudice materially the
success of the proposed issue, sale or distribution of the Offered Securities,
whether in the primary market or in respect of dealings in the secondary market,
or (ii) (A) any change, or any development or event involving a prospective
change, in the condition (financial or other), business, properties or results
of operations of either of the Issuers or their subsidiaries which, in the
judgment of CSFBC, is material and adverse and makes it impractical or
inadvisable to proceed with completion of the offering or the sale of and
payment for the Offered Securities (it being understood that a change in
WinStar's stock price or the continuation of operating losses consistent with
WinStar's historical results shall be deemed not to be, in and of itself, a
material adverse change); (B) any downgrading in the rating of any debt
securities of either of the Issuers by any "nationally recognized statistical
rating organization" (as defined for purposes of Rule 436(g) under the
Securities Act), or any public announcement that any such organization has under
surveillance or review its rating of any debt securities of either of the
Issuers (other than an announcement with positive implications of a possible
upgrading, and no implication of a possible downgrading, of such rating); (C)
any suspension or limitation of trading in securities generally on the New York
Stock Exchange, or any setting of minimum
<PAGE>
                                                                              9
prices for trading on such exchange, or any suspension of trading of any
securities of either of the Issuers on any exchange or in the over-the-counter
market; (D) any banking moratorium declared by U.S. Federal or New York
authorities; or (E) any outbreak or escalation of major hostilities in which the
United States is involved, any declaration of war by Congress or any other
substantial national or international calamity or emergency if, in the judgment
of CSFBC, the effect of any such outbreak, escalation, declaration, calamity or
emergency makes it impractical or inadvisable to proceed with completion of the
offering or sale of and payment for the Offered Securities.

      (c) The Purchasers shall have received an opinion, dated the Closing Date,
of Graubard Mollen & Miller, counsel for the Issuers, substantially to the
effect that:

      (i) Each of the Issuers has been duly incorporated and is an existing
corporation in good standing under the laws of the State of Delaware, with
corporate power and authority to own its properties and conduct its business as
described in the Offering Document;

      (ii) Each of the Indentures and the Registration Rights Agreement has been
duly authorized, executed and delivered; the Offered Securities have been duly
authorized, executed, authenticated, issued and delivered and conform in all
material respects to the description thereof contained in the Offering Document;
and the Indentures, the Offered Securities and the Registration Rights Agreement
constitute valid and legally binding obligations of the Issuers enforceable in
accordance with their terms, subject to bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium and similar laws of general applicability
relating to or affecting creditors' rights and to general equity principles;
and, with respect to the Registration Rights Agreement, except that rights to
indemnity and contribution may be limited by federal and state securities laws
and public policy considerations;

      (iii) Neither of the Issuers is and, after giving effect to the offering
and sale of the Offered Securities and the application of the proceeds thereof
as described in the Offering Document, will be an "investment company" as
defined in the Investment Company Act;

      (iv) No consent, approval, authorization or order of, or filing with, any
governmental agency or body or any court is required for the consummation of the
transactions contemplated by this Agreement in connection with the issuance or
sale of the Offered Securities by the Issuers and the consummation of the
transactions under the Registration Rights Agreement, other than as may be
required under the Securities Act and the Rules and Regulations of the
Commission thereunder with respect to the Registration Rights Agreement and the
transactions contemplated thereunder and such as may be required by securities
or blue sky laws of the various states of the United States and of foreign
jurisdictions in connection with the offer and sale of the Offered Securities;

      (v) The execution, delivery and performance of the Indentures, the
Registration Rights Agreement and this Agreement, and the issuance and sale of
the Offered Securities and compliance with the terms and provisions thereof will
not result in a breach or violation of any of the terms and provisions of, or
constitute a default under, (A) any statute, rule or regulation or any order
known to such counsel of any governmental agency or body or any court having
jurisdiction over either of the Issuers or any subsidiary of the Issuers or any
of their properties, (B) any agreement or instrument listed as an exhibit to
WinStar's Annual Report on Form 10-KSB most recently filed with the Commission
or listed as an exhibit to or filed with any subsequent reports filed by WinStar
under the Exchange Act through December 31, 1996, to which either of the Issuers
or any such subsidiary is a party or by which either of the Issuers or any such
subsidiary is bound or to which any of the properties of either of the Issuers
or any such subsidiary is subject, or (C) the charter or by-laws of either of
the Issuers or any such subsidiary, except, in the case of clause (A) or (B),
breaches, violations or defaults that individually or in the aggregate would not
have a Material Adverse Effect; and each of the Issuers has full power and
corporate authority to authorize, issue and sell the Offered Securities to be
sold by such Issuer as contemplated by this Agreement;

      (vi) Such counsel have no reason to believe that the Offering Document, or
any amendment or supplement thereto, as of the date hereof and as of the Closing
Date, contained any untrue statement of a material fact or omitted to state any
material fact required to be stated therein or necessary to make the statements
therein, in light of the circumstances under which they were made, not
misleading; it being understood that such counsel need express no opinion as to
the financial statements or other financial data contained in the Offering
Document;

      (vii) The descriptions in the Offering Document of statutes, legal and
governmental proceedings and contracts and other documents are accurate in all
material respects and fairly present the information purported to be described
therein;
<PAGE>

                                                                              10

      (viii) This Agreement has been duly authorized, executed and delivered by
each of the Issuers;

      (ix) Based upon the accuracy of the representations and warranties of the
Issuers set forth in Section 2(t) of this Agreement and of the Purchasers in
Section 4 hereof, it is not necessary in connection with (i) the offer, sale and
delivery of the Offered Securities by the Issuers to the several Purchasers
pursuant to this Agreement or (ii) the resales of the Offered Securities by the
several Purchasers in the manner contemplated by this Agreement, to register the
Offered Securities under the Securities Act or to qualify an indenture in
respect thereof under the Trust Indenture Act, other than in connection with the
Issuers' obligations under the Registration Rights Agreement.

      (x) To the best of such counsel's knowledge, the Issuers and their
subsidiaries are in compliance in all material respects with all material terms
and conditions of each License and with all applicable and material rules,
regulations and policies of the FCC pertaining to the Licenses.

      (xi) To the best of such counsel's knowledge, all of the Licenses are
currently valid and in full force and effect, and there is no investigation,
notice of apparent liability, violation, forfeiture or other order or complaint
issued by or before any court or regulatory body, including the FCC, or of any
other proceedings (other than proceedings relating to the wireless
communications industries generally) which could in any manner materially
threaten or adversely affect the validity or continued effectiveness of any of
the Licenses.

      (xii) To the best of such counsel's knowledge, no event has occurred which
(i) results in, or after notice or lapse of time or both would result in,
revocation, suspension, adverse modification, non-renewal, impairment,
restriction or termination of, or order of forfeiture with respect to, any
License or (ii) materially and adversely affects or could reasonably be expected
in the future to materially adversely affect any of the rights of the Issuers or
any of their subsidiaries thereunder.

      (xiii) To the best of such counsel's knowledge, the Issuers and their
subsidiaries have duly filed in a timely manner all material filings, reports,
applications, documents, instruments and information required to be filed by
them under the Communications Act pertaining to the Licenses.

      (xiv) To the best of such counsel's knowledge, there is no reason to
believe that any of the Licenses will not be renewed in the ordinary course.

      The opinions set forth in clauses (x), (xi), (xii), (xiii) and (xiv) may
be given by Willkie Farr & Gallagher, counsel to the Issuers on FCC matters.

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

      (e) The Purchasers shall have received a certificate, dated the Closing
Date, of the Chief Executive Officer or any Vice President and a principal
financial or accounting officer of each of the Issuers in which such officers,
to the best of their knowledge after reasonable investigation, shall state that
the representations and warranties of such Issuer in this Agreement are true and
correct, that such Issuer has complied with all agreements and satisfied all
conditions on its part to be performed or satisfied hereunder at or prior to the
Closing Date, and that, subsequent to the dates of the most recent financial
statements in the Offering Document there has been no material adverse change,
nor any development or event involving a prospective material adverse change, in
the condition (financial or other), business, properties or results of
operations of such Issuer and its subsidiaries taken as a whole except as set
forth in or contemplated by the Offering Document or as described in such
certificate.

      (f) The Purchasers shall have received a letter, dated the Closing Date,
of Grant Thornton LLP which meets the requirements of subsection (a) of this
Section, except that the specified date referred to in such subsection will be a
date not more than five days prior to the Closing Date for the purposes of this
subsection.

      The Issuers will furnish the Purchasers with such conformed copies of such
opinions, certificates, letters and documents as the Purchasers reasonably
request. CSFBC may in its sole discretion waive on
<PAGE>
                                                                              11

behalf of the Purchasers compliance with any conditions to the obligations of
the Purchasers hereunder, whether in respect of the Closing Date or otherwise.

      7. Indemnification and Contribution. (a) The Issuers will jointly and
severally indemnify and hold harmless each Purchaser against any losses, claims,
damages or liabilities, joint or several, to which such Purchaser may become
subject, under the Securities Act or the Exchange Act or otherwise, insofar as
such losses, claims, damages or liabilities (or actions in respect thereof)
arise out of or are based upon any breach of any of the representations and
warranties of the Issuers contained herein or any untrue statement or alleged
untrue statement of any material fact contained in the Offering Document, or any
amendment or supplement thereto, or any related preliminary offering circular,
or arise out of or are based upon the omission or alleged omission to state
therein a material fact necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading, and
will reimburse each Purchaser for any legal or other expenses reasonably
incurred by such Purchaser in connection with investigating or defending any
such loss, claim, damage, liability or action as such expenses are incurred;
provided, however, that the Issuers will not be liable in any such case to the
extent that any such loss, claim, damage or liability arises out of or is based
upon an untrue statement or alleged untrue statement in or omission or alleged
omission from any of such documents in reliance upon and in conformity with
written information furnished to the Issuers by any Purchaser through CSFBC
specifically for use therein, it being understood and agreed that the only such
information consists of the information described as such in subsection (b)
below; provided further, however, that with respect to any untrue statement or
alleged untrue statement in or omission or alleged omission from any preliminary
offering circular, the indemnity agreement contained in this subsection (a)
shall not inure to the benefit of any Purchaser that sold the Offered Securities
concerned to the person asserting any such losses, claims, damages or
liabilities, to the extent that such sale was an initial resale by such
Purchaser and any such loss, claim, damage or liability of such Purchaser
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 Offered Securities to such
person, a copy of the Offering Document if the Issuers had previously furnished
copies thereof to such Purchaser and such Offering Document corrected such
untrue statement or omission or alleged untrue statement or omission.

      (b) Each Purchaser will severally and not jointly indemnify and hold
harmless the Issuers against any losses, claims, damages or liabilities to which
the Issuers may become subject, under the Securities Act or the Exchange Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect thereof) arise out of or are based upon any untrue statement or alleged
untrue statement of any material fact contained in the Offering Document, or any
amendment or supplement thereto, or any related preliminary offering circular,
or arise out of or are based upon the omission or the alleged omission to state
therein a material fact necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading, in
each case to the extent, but only to the extent, that such untrue statement or
alleged untrue statement or omission or alleged omission was made in reliance
upon and in conformity with written information furnished to the Issuers by such
Purchaser through CSFBC specifically for use therein, and will reimburse any
legal or other expenses reasonably incurred by the Issuers in connection with
investigating or defending any such loss, claim, damage, liability or action as
such expenses are incurred, it being understood and agreed that the only such
information furnished by any Purchaser consists of the following information in
the Offering Document furnished on behalf of each Purchaser: the last paragraph
at the bottom of the cover page concerning the terms of the offering by the
Purchasers, the legends concerning over-allotments and stabilizing on the inside
front cover page and, under the caption "Plan of Distribution," (i) the third
sentence of the second paragraph thereunder, (ii) the fourth paragraph
thereunder and (iii) the third sentence in the sixth paragraph thereunder.

      (c) Promptly after receipt by an indemnified party under this Section of
notice of the commencement of any action, such indemnified party will, if a
claim in respect thereof is to be made against the indemnifying party under
subsection (a) or (b) above, notify the indemnifying party of the commencement
thereof; but the omission so to notify the indemnifying party will not relieve
it from any liability which it may have to any indemnified party otherwise than
under subsection (a) or (b) above. In case any such action is brought against
any indemnified party and it notifies the indemnifying party of the commencement
thereof, the indemnifying party will be entitled to participate therein and, to
the extent that it may wish, jointly with any other indemnifying party similarly
notified, to assume the defense thereof, with counsel reasonably satisfactory to
such indemnified party (who shall not, except with the consent of the
indemnified party (which consent shall not be unreasonably withheld), be counsel
to the indemnifying party), and after notice from the indemnifying party to such
indemnified party of its election so to assume the defense thereof, the
indemnifying party will not be liable to such indemnified party under this
Section for any legal or other expenses subsequently incurred by such
indemnified party in connection with the defense thereof other than reasonable
costs of investigation. No indemnifying party shall, without the prior written
<PAGE>
                                                                              12

consent of the indemnified party (which consent shall not be unreasonably
withheld), effect any settlement of any pending or threatened action in respect
of which any indemnified party is or could have been a party and indemnity could
have been sought hereunder by such indemnified party unless such settlement
includes an unconditional release of such indemnified party from all liability
on any claims that are the subject matter of such action.

      (d) If the indemnification provided for in this Section is unavailable or
insufficient to hold harmless an indemnified party under subsection (a) or (b)
above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities referred to in subsection (a) or (b) above (i) in such proportion as
is appropriate to reflect the relative benefits received by the Issuers on the
one hand and the Purchasers on the other from the offering of the Offered
Securities or (ii) if the allocation provided by clause (i) above is not
permitted by applicable law, in such proportion as is appropriate to reflect not
only the relative benefits referred to in clause (i) above but also the relative
fault of the Issuers on the one hand and the Purchasers on the other in
connection with the statements or omissions which resulted in such losses,
claims, damages or liabilities as well as any other relevant equitable
considerations. The relative benefits received by the Issuers on the one hand
and the Purchasers on the other shall be deemed to be in the same proportion as
the total net proceeds from the offering (before deducting expenses but after
deducting the Purchasers' discounts and commissions) received by the Issuers
bear to the total discounts and commissions received by the Purchasers from the
Issuers under this Agreement. The relative fault shall be determined by
reference to, among other things, whether the untrue or alleged untrue statement
of a material fact or the omission or alleged omission to state a material fact
relates to information supplied by the Issuers or the Purchasers and the
parties' relative intent, knowledge, access to information and opportunity to
correct or prevent such untrue statement or omission. The amount paid by an
indemnified party as a result of the losses, claims, damages or liabilities
referred to in the first sentence of this subsection (d) shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in connection with investigating or defending any action or claim which is
the subject of this subsection (d). Notwithstanding the provisions of this
subsection (d), no Purchaser shall be required to contribute any amount in
excess of the amount by which the total price at which the Offered Securities
purchased by it were resold exceeds the amount of any damages which such
Purchaser has otherwise been required to pay by reason of such untrue or alleged
untrue statement or omission or alleged omission. The Purchasers' obligations in
this subsection (d) to contribute are several in proportion to their respective
purchase obligations and not joint.

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

      8. Default of Purchasers. If any Purchaser or Purchasers default in their
obligations to purchase Offered Securities hereunder and the aggregate principal
amount of Offered Securities that such defaulting Purchaser or Purchasers agreed
but failed to purchase does not exceed 10% of the total principal amount of
Offered Securities, CSFBC may make arrangements satisfactory to the Issuers for
the purchase of such Offered Securities by other persons, including any of the
Purchasers, but if no such arrangements are made by the Closing Date, the
non-defaulting Purchasers shall be obligated severally, in proportion to their
respective commitments hereunder, to purchase the Offered Securities that such
defaulting Purchasers agreed but failed to purchase. If any Purchaser or
Purchasers so default and the aggregate principal amount of Offered Securities
with respect to which such default or defaults occur exceeds 10% of the total
principal amount of Offered Securities and arrangements satisfactory to CSFBC
and the Issuers for the purchase of such Offered Securities by other persons are
not made within 36 hours after such default, this Agreement will terminate
without liability on the part of any non-defaulting Purchaser or the Issuers,
except as provided in Section 9. As used in this Agreement, the term "Purchaser"
includes any person substituted for a Purchaser under this Section. Nothing
herein will relieve a defaulting Purchaser from liability for its default.

      9. Survival of Certain Representations and Obligations. The respective
indemnities, agreements, representations, warranties and other statements of the
Issuers or its officers and of the several Purchasers set forth in or made
pursuant to this Agreement will remain in full force and effect, regardless of
any investigation, or statement as to the results thereof, made by or on behalf
of any Purchaser, the Issuers or any of their respective representatives,
officers or directors or any controlling person, and will survive delivery of
and payment for the Offered Securities. If for any reason the purchase of the
Offered Securities by the Purchasers is not consummated, the Issuers shall
remain responsible for the expenses to be paid or
<PAGE>
                                                                              13

reimbursed by them pursuant to Section 5 and the respective obligations of the
Issuers and the Purchasers pursuant to Section 7 shall remain in effect. If the
purchase of the Offered Securities by the Purchasers is not consummated for any
reason other than solely because of the termination of this Agreement pursuant
to Section 8 or solely because of the occurrence of any event specified in
clause (C), (D) or (E) of Section 6(b)(ii), the Issuers will reimburse the
Purchasers for all out-of-pocket expenses (including fees and disbursements of
counsel) reasonably incurred by them in connection with the offering of the
Offered Securities.

      10. Notices. All communications hereunder will be in writing and, if sent
to the Purchasers will be mailed, delivered or telegraphed and confirmed to the
Purchasers, c/o Credit Suisse First Boston Corporation, Eleven Madison Avenue,
New York, NY 10010, Attention: Investment Banking Department-- Transactions
Advisory Group, or, if sent to the Issuers, will be mailed, delivered or
electronically transmitted and confirmed to them at 230 Park Avenue, New York,
NY 10169, Attention: Timothy Graham; provided, however, that any notice to a
Purchaser pursuant to Section 7 will be mailed, delivered or telegraphed and
confirmed to such Purchaser.

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

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

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

      The Issuers hereby submit to the non-exclusive jurisdiction of the Federal
and state courts in the Borough of Manhattan in The City of New York in any suit
or proceeding arising out of or relating to this Agreement or the transactions
contemplated hereby.
<PAGE>
                                                                              14

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

                                        Very truly yours,

                                        WinStar Communications, Inc.


                                        By___________________________________
                                          Name:
                                          Title


                                        WinStar Equipment Corp.


                                        By___________________________________
                                          Name:
                                          Title

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

Credit Suisse First Boston Corporation
BT Securities Corporation

By Credit Suisse First Boston Corporation

        By  _____________________________________
            Name:
            Title:
<PAGE>

                                   SCHEDULE A

                                                          Principal Amount
                                    Principal Amount        of Equipment
Purchaser                            of Senior Notes            Notes
- ---------                            ---------------      ----------------

Credit Suisse First Boston
  Corporation                         $ 60,000,000          $120,000,000
BT Securities Corporation               40,000,000            80,000,000
                                      ------------          ------------
                                      $100,000,000          $200,000,000
                                      ============          ============


                                       A-1
<PAGE>



                                                                  EXECUTION COPY

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





                          WINSTAR COMMUNICATIONS, INC.,
                                    as Issuer

                                       and

                    UNITED STATES TRUST COMPANY OF NEW YORK,
                                   as Trustee

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

                    Senior Deferred Interest Notes Indenture

                            Dated as of March 1, 1997

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

                 14 1/2% Senior Deferred Interest Notes Due 2005





================================================================================
<PAGE>

                              CROSS-REFERENCE TABLE

TIA Sections                                                  Indenture Sections
- ------------                                                  ------------------

ss. 310(a)(1).................................................       7.10
       (a)(2).................................................       7.10
       (b)....................................................       7.08
ss. 313(c)....................................................       7.06; 10.02
ss. 314(a)....................................................       4.18; 10.02
       (a)(4).................................................       4.17; 10.02
       (c)(1).................................................       10.03
       (c)(2).................................................       10.03
       (e)....................................................       10.04
ss.315(b).....................................................       7.05; 10.02
ss. 316(a)(1)(A)..............................................       6.05
       (a)(1)(B)..............................................       6.04
       (b)....................................................       6.07
ss. 317(a)(1).................................................       6.08
       (a)(2).................................................       6.09
ss. 318(a)....................................................       10.01
       (c)....................................................       10.01

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

                                TABLE OF CONTENTS

RECITALS OF THE COMPANY....................................................    1
                                                                              
                                   ARTICLE ONE                                
                   DEFINITIONS AND INCORPORATION BY REFERENCE                 
                                                                              
SECTION 1.01        Definitions............................................    2
SECTION 1.02.       Incorporation by Reference of Trust Indenture Act......   21
SECTION 1.03.       Rules of Construction..................................   21
SECTION 1.04.       Designation of the Securities..........................   22
                                                                              
                                   ARTICLE TWO                                
                                 THE SECURITIES                               
                                                                              
SECTION 2.01.       Form and Dating........................................   22
SECTION 2.02.       Execution and Authentication...........................   22
SECTION 2.03.       Registrar and Paying Agent.............................   23
SECTION 2.04.       Paying Agent to Hold Money in Trust....................   23
SECTION 2.05.       Securityholder Lists...................................   24
SECTION 2.06.       Transfer and Exchange..................................   24
SECTION 2.07.       Replacement Securities.................................   25
SECTION 2.08.       Outstanding Securities.................................   25
SECTION 2.09.       Temporary Securities...................................   26
SECTION 2.10.       Cancellation...........................................   26
SECTION 2.11.       Defaulted Interest26                                      
SECTION 2.12.       CUSIP Numbers..........................................   26
                                                                              
                                  ARTICLE THREE                               
                                   REDEMPTION                                 
                                                                              
SECTION 3.01.       Right of Redemption....................................   27
SECTION 3.02.       Notices to Trustee.....................................   27
SECTION 3.03.       Selection of Securities to Be Redeemed.................   27
SECTION 3.04.       Notice of Redemption...................................   28
SECTION 3.05.       Effect of Notice of Redemption.........................   29
SECTION 3.06.       Deposit of Redemption Price............................   29
SECTION 3.07.       Payment of Securities Called for Redemption............   29
SECTION 3.08.       Securities Redeemed in Part............................   30
                                                                           
- ----------
Note: The Table of Contents shall not for any purposes be deemed to be a part of
     the Indenture.
<PAGE>

                                       ii


                                  ARTICLE FOUR
                                    COVENANTS

SECTION 4.01.       Payment of Securities..................................   30
SECTION 4.02.       Maintenance of Office or Agency........................   30
SECTION 4.03.       Limitation on Indebtedness.............................   31
SECTION 4.04.       Limitation on Restricted Payments......................   33
SECTION 4.05.       Limitation on Dividend and Other Payment                  
                    Restrictions Affecting Restricted Subsidiaries.........   36
SECTION 4.06.       Limitation on the Issuance of Capital Stock of            
                    Restricted Subsidiaries ...............................   38
SECTION 4.07.       Limitation on Issuances of Guarantees by                  
                    Restricted Subsidiaries ...............................   38
SECTION 4.08.       Limitation on Transactions with Shareholders              
                    and Affiliates.........................................   39
SECTION 4.09.       Limitation on Liens....................................   39
SECTION 4.10.       Limitation on Sale-Leaseback Transactions..............   40
SECTION 4.11.       Limitation on Asset Sales..............................   41
SECTION 4.12.       Repurchase of Securities upon a Change of Control......   42
SECTION 4.13.       Existence..............................................   43
SECTION 4.14.       Payment of Taxes and Other Claims......................   43
SECTION 4.15.       Maintenance of Properties and Insurance................   43
SECTION 4.16.       Notice of Defaults.....................................   44
SECTION 4.17.       Compliance Certificates................................   44
SECTION 4.18.       SEC Reports and Reports to Holders.....................   45
SECTION 4.19.       Waiver of Stay, Extension or Usury Laws................   45
                                                                              
                                  ARTICLE FIVE                                
                              SUCCESSOR CORPORATION                           
                                                                              
SECTION 5.01.       When Company May Merge, Etc............................   45
SECTION 5.02.       Successor Substituted..................................   46
                                                                              
                                   ARTICLE SIX                                
                              DEFAULT AND REMEDIES                            
                                                                              
SECTION 6.01.       Events of Default......................................   47
SECTION 6.02.       Acceleration...........................................   48
SECTION 6.03.       Other Remedies.........................................   49
SECTION 6.04.       Waiver of Past Defaults................................   49
SECTION 6.05.       Control by Majority....................................   49
SECTION 6.06.       Limitation on Suits....................................   50
SECTION 6.07.       Rights of Holders to Receive Payment...................   50
                                                                           
<PAGE>

                                       iii


SECTION 6.08.       Collection Suit by Trustee.............................   51
SECTION 6.09.       Trustee May File Proofs of Claim.......................   51
SECTION 6.10.       Priorities.............................................   51
SECTION 6.11.       Undertaking for Costs..................................   52
SECTION 6.12.       Restoration of Rights and Remedies.....................   52
SECTION 6.13.       Rights and Remedies Cumulative.........................   52
SECTION 6.14.       Delay or Omission Not Waiver...........................   52
                                                                              
                                  ARTICLE SEVEN                               
                                     TRUSTEE                                  
                                                                              
SECTION 7.01.       General................................................   53
SECTION 7.02.       Certain Rights of Trustee..............................   53
SECTION 7.03.       Individual Rights of Trustee...........................   54
SECTION 7.04.       Trustee's Disclaimer...................................   54
SECTION 7.05.       Notice of Default......................................   54
SECTION 7.06.       Reports by Trustee to Holders..........................   55
SECTION 7.07.       Compensation and Indemnity.............................   55
SECTION 7.08.       Replacement of Trustee.................................   55
SECTION 7.09.       Successor Trustee by Merger, Etc.......................   56
SECTION 7.10.       Eligibility............................................   57
SECTION 7.11.       Money Held in Trust57                                     
SECTION 7.12.       Withholding Taxes57                                       
                                                                              
                                  ARTICLE EIGHT                               
                             DISCHARGE OF INDENTURE                           
                                                                              
SECTION 8.01.       Termination of Company's Obligations...................   57
SECTION 8.02.       Defeasance and Discharge of Indenture..................   58
SECTION 8.03.       Defeasance of Certain Obligations......................   60
SECTION 8.04.       Application of Trust Money.............................   62
SECTION 8.05.       Repayment to Company...................................   62
SECTION 8.06.       Reinstatement..........................................   63
SECTION 8.07.       Insiders...............................................   63
                                                                              
                                  ARTICLE NINE                                
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS                    
                                                                              
SECTION 9.01.       Without Consent of Holders.............................   63
SECTION 9.02.       With Consent of Holders................................   64
SECTION 9.03.       Revocation and Effect of Consent.......................   65
<PAGE>

                                       iv

SECTION 9.04.       Notation on or Exchange of Securities..................   66
SECTION 9.05.       Trustee to Sign Amendments, Etc........................   66
SECTION 9.06.       Conformity with Trust Indenture Act....................   66
                                                                              
                                          ARTICLE TEN                         
                                         MISCELLANEOUS                        
                                                                              
SECTION 10.01.      Trust Indenture Act of 1939............................   66
SECTION 10.02.      Notices................................................   66
SECTION 10.03.      Certificate and Opinion as to Conditions Precedent.....   67
SECTION 10.04.      Statements Required in Certificate or Opinion..........   68
SECTION 10.05.      Rules by Trustee, Paying Agent or Registrar............   68
SECTION 10.06.      Payment Date Other Than a Business Day.................   68
SECTION 10.07.      Governing Law..........................................   68
SECTION 10.08.      No Adverse Interpretation of Other Agreements..........   69
SECTION 10.09.      No Recourse Against Others.............................   69
SECTION 10.10.      Successors.............................................   69
SECTION 10.11.      Duplicate Originals....................................   69
SECTION 10.12.      Separability...........................................   69
SECTION 10.13.      Table of Contents, Headings, Etc.......................   69

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

Rule 144A/Regulation S Appendix
<PAGE>

            INDENTURE, dated as of March 1, 1997, between WINSTAR
      COMMUNICATIONS, INC., a Delaware corporation, as issuer (the "Company"),
      and UNITED STATES TRUST COMPANY OF NEW YORK, as trustee (the "Trustee").

                            RECITALS OF THE COMPANY

            Each party agrees as follows for the benefit of the other party and
for the equal and ratable benefit of the Holders of the Company's 14 1/2% Senior
Deferred Interest Notes Due 2005 (the "Initial Securities") and, if and when
issued pursuant to a registered exchange for Initial Securities, the Company's
14 1/2% Senior Deferred Interest Notes Due 2005 (the "Exchange Securities") and
if and when issued pursuant to a private exchange for Initial Securities, the
Company's 14 1/2% Senior Deferred Interest Notes Due 2005 (the "Private Exchange
Securities", together with the Exchange Securities and the Initial Securities,
the "Securities"):
<PAGE>

                                        2


                                   ARTICLE ONE
                   DEFINITIONS AND INCORPORATION BY REFERENCE

            SECTION 1.01. Definitions.

            "Accumulated Amount" means, as of any date (the "Specified Date"),
the amount provided below for each $1,000 principal amount of the Securities.

            (i) If the Specified Date occurs on one of the following dates
      (each, a "SemiAnnual Interest Accrual Date"), the Accumulated Amount of a
      Security will equal the amount set forth below for such Security for such
      SemiAnnual Interest Accrual Date:

            SemiAnnual Interest Accrual Date     Accumulated Amount
            --------------------------------     ------------------
            April 15,1997.......................     $1,010.875
            October 15, 1997....................      1,084.163
            April 15, 1998......................      1,162.765
            October 15, 1998....................      1,247.066
            April 15, 1999......................      1,337.478
            October 15, 1999....................      1,434.445
            April 15, 2000......................      1,538.442
            October 15, 2000....................      1,649.980

            (ii) if the Specified Date occurs before the first SemiAnnual
      Interest Accrual Date, the Accumulated Amount will equal the sum of (A)
      $1,000 and (B) an amount equal to the product of (1) the Accumulated
      Amount for the first SemiAnnual Interest Accrual Date less $1,000
      multiplied by (2) a fraction, the numerator of which is the number of days
      elapsed from the Closing Date to the Specified Date, using a 360-day year
      of twelve 30-day months, and the denominator of which is the number of
      days from the Closing Date to the first SemiAnnual Interest Accrual Date,
      using a 360-day year of twelve 30-day months;

            (iii) if the Specified Date occurs between two SemiAnnual Interest
      Accrual Dates, the Accumulated Amount will equal the sum of (A) the
      Accumulated Amount for the SemiAnnual Interest Accrual Date immediately
      preceding such Specified Date and (B) an amount equal to the product of
      (1) the Accumulated Amount for the immediately following SemiAnnual
      Interest Accrual Date less the Accumulated Amount for the immediately
      preceding SemiAnnual Interest Accrual Date multiplied by (2) a fraction,
      the numerator of which is the number of days elapsed from the immediately
      preceding SemiAnnual Interest Accrual Date to the Specified Date, using a
      360-day year of twelve 30-day months, and the denominator of which is 180;
      or

            (iv) if the Specified Date occurs after the last SemiAnnual Interest
      Accrual Date, the Accumulated Amount of a Security will equal $1,649.98.
<PAGE>

                                        3


            "Adjusted Consolidated Net Income" means, for any period, the
aggregate net income (or loss) of the Company and its Restricted Subsidiaries
for such period determined in conformity with GAAP; provided, however, that the
following items shall be excluded in computing Adjusted Consolidated Net Income
(without duplication): (i) the net income of any Person (other than net income
attributable to a Restricted Subsidiary) in which any Person (other than the
Company or any of its Restricted Subsidiaries) has a joint interest and the net
income of any Unrestricted Subsidiary, except to the extent of the amount of
dividends or other distributions actually paid to the Company or any of its
Restricted Subsidiaries by such other Person, including, without limitation, an
Unrestricted Subsidiary during such period; (ii) solely for the purposes of
calculating the amount of Restricted Payments that may be made pursuant to
clause (C) of the first paragraph of Section 4.04 (and, in such case, except to
the extent includable pursuant to clause (i) above), the net income (or loss) of
any Person accrued prior to the date it becomes a Restricted Subsidiary or is
merged into or consolidated with the Company or any of its Restricted
Subsidiaries or all or substantially all of the property and assets of such
Person are acquired by the Company or any of its Restricted Subsidiaries; (iii)
the net income of any Restricted Subsidiary to the extent that the declaration
or payment of dividends or similar distributions by such Restricted Subsidiary
of such net income is not at the time permitted by the operation of the terms of
its charter or any agreement, instrument, judgment, decree, order, statute, rule
or governmental regulation applicable to such Restricted Subsidiary; (iv) any
gains or losses (on an after-tax basis) attributable to Asset Sales; (v) except
for purposes of calculating the amount of Restricted Payments that may be made
pursuant to clause (C) of the first paragraph of Section 4.04, any amount paid
as, or accrued for, cash dividends on Preferred Stock of the Company or any
Restricted Subsidiary owned by Persons other than the Company and any of its
Restricted Subsidiaries; and (vi) all extraordinary gains and extraordinary
losses.

            "Adjusted Consolidated Net Tangible Assets" means the total amount
of assets of the Company and its Restricted Subsidiaries (less applicable
depreciation, amortization and other valuation reserves), except to the extent
resulting from write-ups of capital assets (excluding write-ups in connection
with accounting for acquisitions in conformity with GAAP), after deducting
therefrom (i) all current liabilities of the Company and its Restricted
Subsidiaries (excluding intercompany items) and (ii) all goodwill, trade names,
trademarks, patents, unamortized debt discount and expense and other like
intangibles (other than licenses issued by the FCC), all as set forth on the
quarterly or annual consolidated balance sheet of the Company and its Restricted
Subsidiaries, prepared in conformity with GAAP and most recently filed with the
SEC pursuant to Section 4.18; provided, however, that the value of any licenses
issued by the FCC shall, in the event of an auction for similar licenses, be
equal to the fair market value ascribed thereto in good faith by the Board of
Directors and evidenced by a Board Resolution. As used in this Indenture,
references to financial statements of the Company and its Restricted
Subsidiaries shall be adjusted to exclude Unrestricted Subsidiaries if the
context requires.
<PAGE>

                                        4


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

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

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

            "Asset Sale" means any sale, transfer or other disposition
(including by way of merger, consolidation or sale-leaseback transactions) in
one transaction or a series of related transactions by the Company or any of its
Restricted Subsidiaries to any Person other than the Company or any of its
Restricted Subsidiaries of (i) all or any of the Capital Stock of any Restricted
Subsidiary, (ii) all or substantially all of the property and assets of an
operating unit or business of the Company or any of its Restricted Subsidiaries
or (iii) any other property or assets of the Company or any of its Restricted
Subsidiaries outside the ordinary course of business of the Company or such
Restricted Subsidiary and, in each case, that is not governed by the provisions
of Article Five; provided, however, that the following shall not be included
within the meaning of "Asset Sale": (A) sales or other dispositions of
inventory, receivables and other current assets; (B) sales or other dispositions
of equipment that has become worn out, obsolete or damaged or otherwise
unsuitable for use in connection with the business of the Company or its
Restricted Subsidiaries and (C) a substantially simultaneous exchange of, or a
sale or disposition (other than 85% or more for cash or cash equivalents) by the
Company or any of its Restricted Subsidiaries of, licenses issued by the FCC or
applications or bids therefor; provided, however, that the consideration
received by the Company or any such Restricted Subsidiary in connection with
such exchange, sale or disposition shall be equal to the fair market value of
licenses so exchanged, sold or disposed of, as determined by the Board of
Directors; and (D) except for purposes of the definition of "Indebtedness to
EBITDA Ratio", any sale or other disposition of securities of an Unrestricted
Subsidiary.

            "Average Life" means, at any date of determination with respect to
any debt security, the quotient obtained by dividing (i) the sum of the products
of (a) the number of years
<PAGE>

                                        5


from such date of determination to the dates of each successive scheduled
principal payment of such debt security and (b) the amount of such principal
payment by (ii) the sum of all such principal payments.

            "Board of Directors" means the Board of Directors of the Company or
any committee of such Board of Directors duly authorized to act with respect to
this Indenture.

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

            "Business Day" means any day except a Saturday, Sunday or other day
on which commercial banks in The City of New York, or in the city of the
Corporate Trust Office of the Trustee, are authorized by law to close.

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

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

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

            "Closing Date" means the date on which the Securities are originally
issued under this Indenture.
<PAGE>

                                        6


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

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

            "Company Order" means a written request or order signed in the name
of the Company (i) by its Chairman, a Vice Chairman, its President or a Vice
President and (ii) by its Treasurer, an Assistant Treasurer, its Secretary or an
Assistant Secretary and delivered to the Trustee; provided, however, that such
written request or order may be signed by any two of the officers or directors
listed in clause (i) above in lieu of being signed by one of such officers or
directors listed in such clause (i) and one of the officers listed in clause
(ii) above.

            "Consolidated EBITDA" means, for any period, the sum of the amounts
for such period of (i) Adjusted Consolidated Net Income, (ii) Consolidated
Interest Expense, to the extent such amount was deducted in calculating Adjusted
Consolidated Net Income, (iii) income taxes, to the extent such amount was
deducted in calculating Adjusted Consolidated Net Income (other than income
taxes (either positive or negative) attributable to extraordinary and
nonrecurring gains or losses or sales of assets), (iv) depreciation expense, to
the extent such amount was deducted in calculating Adjusted Consolidated Net
Income, (v) amortization expense, to the extent such amount was deducted in
calculating Adjusted Consolidated Net Income, and (vi) all other noncash items
reducing Adjusted Consolidated Net Income (other than items that will require
cash payments and for which an accrual or reserve is, or is required by GAAP to
be, made), less all noncash items increasing Adjusted Consolidated Net Income,
all as determined on a consolidated basis for the Company and its Restricted
Subsidiaries in conformity with GAAP; provided, however, that, if any Restricted
Subsidiary is not a Wholly Owned Restricted Subsidiary, Consolidated EBITDA
shall be reduced (to the extent not otherwise reduced in accordance with GAAP)
by an amount equal to (A) the amount of the Adjusted Consolidated Net Income
attributable to such Restricted Subsidiary multiplied by (B) the quotient of (1)
the number of shares of outstanding Common Stock of such Restricted Subsidiary
not owned on the last day of such period by the Company or any of its Restricted
Subsidiaries divided by (2) the total number of shares of outstanding Common
Stock of such Restricted Subsidiary on the last day of such period.

            "Consolidated Indebtedness" means the aggregate amount of
Indebtedness of the Company and its Restricted Subsidiaries on a consolidated
basis.
<PAGE>

                                        7


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

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

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

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

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

                                        8


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

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

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

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

            "Equipment Note Guarantee" means the Guarantee of the Equipment
Notes by the Company pursuant to Article Ten of the Guaranteed Senior Secured
Notes Indenture among Winstar Equipment Corp., as issuer, the Company, as
guarantor, and United States Trust Company of New York, as trustee, dated as of
March 1, 1997.

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

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

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

            "fair market value" means the price that would be paid in an
arm's-length transaction between an informed and willing seller under no
compulsion to sell and an informed and willing buyer under no compulsion to buy,
as determined in good faith by the Board of Directors (whose determination shall
be conclusive) and evidenced by a Board Resolution.

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

            "GAAP" means generally accepted accounting principles in the United
States of America as in effect as of the date of this Indenture, including,
without limitation, those set forth in the opinions and pronouncements of the
Accounting Principles Board of the American Institute of Certified Public
Accountants and statements and pronouncements of the Financial Accounting
Standards Board or in such other statements by such other entity as approved by
a significant segment of the accounting profession. All ratios and computations
contained in this Indenture
<PAGE>

                                        9


shall be computed in conformity with GAAP applied on a consistent basis, except
that calculations made for purposes of determining compliance with the terms of
the covenants set forth in Article Four and Article Five and with other
provisions of this Indenture shall be made without giving effect to (i) the
amortization of any expenses incurred in connection with the offering of the
Securities or the Equipment Notes and (ii) except as otherwise provided, the
amortization of any amounts required or permitted by Accounting Principles Board
Opinion Nos. 16 and 17.

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

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

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

            "Incur" means, with respect to any Indebtedness, to incur, create,
issue, assume, Guarantee or otherwise become liable for or with respect to, or
become responsible for, the payment of, contingently or otherwise, such
Indebtedness, including, with respect to the Company and its Restricted
Subsidiaries, an "Incurrence" of Indebtedness by reason of a Person becoming a
Restricted Subsidiary of the Company; provided, however, that neither the
accrual of interest nor the accretion of original issue discount shall be
considered an Incurrence of Indebtedness.

            "Indebtedness" means, with respect to any Person at any date of
determination (without duplication), (i) all indebtedness of such Person for
borrowed money, (ii) all obligations of such Person evidenced by bonds,
debentures, notes or other similar instruments (whether negotiable or
non-negotiable), (iii) all obligations of such Person in respect of letters of
credit or other similar instruments (including reimbursement obligations with
respect thereto), (iv) all obligations of such Person to pay the deferred and
unpaid purchase price of property or services, which purchase price is due more
than six months after the date of placing such property in
<PAGE>

                                       10


service or taking delivery and title thereto or the completion of such services,
except trade payables, (v) all obligations of such Person as lessee under
Capitalized Leases, (vi) all Indebtedness of other Persons secured by a Lien on
any asset of such Person, whether or not such Indebtedness is assumed by such
Person; provided, however, that the amount of such Indebtedness shall be the
lesser of (A) the fair market value of such asset at such date of determination
and (B) the amount of such Indebtedness, (vii) all Indebtedness of other Persons
Guaranteed by such Person to the extent such Indebtedness is Guaranteed by such
Person and (viii) to the extent not otherwise included in this definition,
obligations under Currency Agreements and Interest Rate Agreements. The amount
of Indebtedness of any Person at any date shall be the outstanding balance at
such date of all unconditional obligations as described above and, with respect
to contingent obligations that are included in any of clauses (i) through (viii)
above, the maximum liability upon the occurrence of the contingency giving rise
to the obligation; provided, however, that (A) the amount outstanding at any
time of any Indebtedness issued with original issue discount is (1) for purposes
of determining the Indebtedness to EBITDA Ratio, the face amount of such
Indebtedness less the remaining unamortized portion of the original issue
discount of such Indebtedness at such time as determined in conformity with GAAP
and (2) for all other purposes, the amount determined in clause (1) on the date
such Indebtedness is originally Incurred and (B) Indebtedness shall not include
any liability for federal, state, local or other taxes.

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

                                       11


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

            "Interest Payment Date" means each semiannual interest payment date
on April 15 and October 15 of each year, commencing April 15, 2001.

            "Interest Rate Agreement" means any interest rate protection
agreement, interest rate future agreement, interest rate option agreement,
interest rate swap agreement, interest rate cap agreement, interest rate collar
agreement, interest rate hedge agreement or other similar agreement or
arrangement designed to protect the Company or any of its Restricted
Subsidiaries against fluctuations in interest rates in respect of Indebtedness
to or under which the Company or any of its Restricted Subsidiaries is a party
or a beneficiary on the date of this Indenture or becomes a party or a
beneficiary hereafter; provided, however, that the notional principal amount
thereof does not exceed the principal amount of the Indebtedness of the Company
and its Restricted Subsidiaries that bears interest at floating rates.

            "Investment" in any Person means any direct or indirect advance,
loan or other extension of credit (including, without limitation, by way of
Guarantee or similar arrangement; but excluding advances to customers in the
ordinary course of business that are, in conformity with GAAP, recorded as
accounts receivable on the balance sheet of the Company or its Restricted
Subsidiaries) or capital contribution to (by means of any transfer of cash or
other property to others or any payment for property or services for the account
or use of others), or any purchase or acquisition of Capital Stock, bonds,
notes, debentures or other similar instruments issued by, such Person and shall
include (i) the designation of a Restricted Subsidiary as an Unrestricted
Subsidiary and (ii) the fair market value of the Capital Stock held by the
Company and the Restricted Subsidiaries of any Person that has ceased to be a
Restricted Subsidiary by reason of any transaction permitted by clause (iii) of
Section 4.06. For purposes of the definition of "Unrestricted Subsidiary" and
Section 4.04, (i) "Investment" shall include the fair market value of the assets
(net of liabilities) of any Restricted Subsidiary of the Company at the time
that such Restricted Subsidiary of the Company is designated an Unrestricted
Subsidiary and shall exclude the fair market value of the assets (net of
liabilities) of any Unrestricted Subsidiary at the time that such Unrestricted
Subsidiary is designated a Restricted Subsidiary of the Company and (ii) any
property transferred to or from an Unrestricted Subsidiary shall be valued at
its fair market value at the time of such transfer, in each case as determined
by the Board of Directors in good faith.

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

                                       12


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

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

                                       13


be entitled to withdraw their election if the Paying Agent receives, not later
than the close of business on the third Business Day immediately preceding the
Payment Date, a telegram, facsimile transmission or letter setting forth the
name of such Holder, the principal amount of Securities delivered for purchase
and a statement that such Holder is withdrawing his election to have such
Securities purchased; and (vii) that Holders whose Securities are being
purchased only in part will be issued new Securities equal in principal amount
(and accrued and unpaid interest) to the unpurchased portion thereof; provided,
however, that each Security purchased and each new Security issued shall be in a
principal amount of $1,000 or integral multiples thereof. On the Payment Date,
the Company shall (i) accept for payment on a pro rata basis any Securities or
portions thereof tendered pursuant to an Offer to Purchase; (ii) deposit with
the Paying Agent money sufficient to pay the purchase price of all Securities or
portions thereof so accepted; and (iii) deliver, or cause to be delivered, to
the Trustee all Securities or portions thereof so accepted together with an
Officers' Certificate specifying the Securities or portions thereof accepted for
payment by the Company. The Paying Agent shall promptly mail to the Holders of
the Securities so accepted for payment in an amount equal to the purchase price,
and the Trustee shall promptly authenticate and mail to such Holders a new
Security equal in principal amount to any unpurchased portion of the Securities
surrendered; provided, however, that each Security purchased and each new
Security issued shall be in a principal amount of $1,000 or integral multiples
thereof. The Company will publicly announce the results of an Offer to Purchase
as soon as practicable after the Payment Date. The Trustee shall act as the
Paying Agent for an Offer to Purchase. The Company will comply with Rule 14e-1
under the Exchange Act and any other securities laws and regulations thereunder
to the extent such laws and regulations are applicable, in the event that the
Company is required to repurchase Securities pursuant to an Offer to Purchase.

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

            "Officers' Certificate" means a certificate signed by one Officer
listed in clause (i) of the definition thereof and one Officer listed in clause
(ii) of the definition thereof; provided, however, that any such certificate may
be signed by any two of the Officers listed in clause (i) of the definition
thereof in lieu of being signed by one Officer listed in clause (i) of the
definition thereof and one Officer listed in clause (ii) of the definition
thereof. Each Officers' Certificate (other than certificates provided pursuant
to TIA Section 314(a)(4)) shall include the statements provided for in TIA
Section 314(e).

            "Old Senior Notes" means the 14% Senior Discount Notes due 2005 of
the Company.
<PAGE>

                                       14


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

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

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

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

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

            "Permitted Liens" means (i) Liens for taxes, assessments,
governmental charges or claims that are being contested in good faith by
appropriate legal proceedings promptly instituted and diligently conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in conformity with GAAP shall have been made; (ii) statutory or common
<PAGE>

                                       15


law Liens of landlords and carriers, warehousemen, mechanics, suppliers,
materialmen, repairmen or other similar Liens arising in the ordinary course of
business and with respect to amounts not yet delinquent or being contested in
good faith by appropriate legal proceedings promptly instituted and diligently
conducted and for which a reserve or other appropriate provision, if any, as
shall be required in conformity with GAAP shall have been made; (iii) Liens
incurred or deposits made in the ordinary course of business in connection with
workers' compensation, unemployment insurance and other types of social
security; (iv) Liens incurred or deposits made to secure the performance of
tenders, bids, leases, statutory or regulatory obligations, bankers'
acceptances, surety and appeal bonds, government contracts, performance and
return-of-money bonds and other obligations of a similar nature incurred in the
ordinary course of business (exclusive of obligations for the payment of
borrowed money) and a bank's unexercised right of set-off with respect to
deposits made in the ordinary course; (v) easements, rights-of-way, municipal
and zoning ordinances and similar charges, encumbrances, title defects or other
irregularities that do not materially interfere with the ordinary course of
business of the Company or any of its Restricted Subsidiaries; (vi) Liens
(including extensions and renewals thereof) upon real or personal property
acquired after the Closing Date; provided, however, that (a) such Lien is
created solely for the purpose of securing Indebtedness Incurred in accordance
with Section 4.03 either (1) to finance the cost (including the cost of
improvement or construction) of the item of property or assets subject thereto
and such Lien is created prior to, at the time of or within six months after the
later of the acquisition, the completion of construction or the commencement of
full operation of such property or (2) to refinance any Indebtedness previously
so secured, (b) the principal amount of the Indebtedness secured by such Lien
does not exceed 100% of such cost and (c) any such Lien shall not extend to or
cover any property or assets other than such item of property or assets and any
improvements on such item; (vii) leases or subleases granted to others that do
not materially interfere with the ordinary course of business of the Company and
its Restricted Subsidiaries, taken as a whole; (viii) Liens encumbering property
or assets under construction arising from progress or partial payments by a
customer of the Company or its Restricted Subsidiaries relating to such property
or assets; (ix) any interest or title of a lessor in the property subject to any
Capitalized Lease or operating lease; (x) Liens arising from filing Uniform
Commercial Code financing statements regarding leases; (xi) Liens on property
of, or on shares of stock or Indebtedness of, any corporation existing at the
time such corporation becomes, or becomes a part of, any Restricted Subsidiary;
provided, however, that such Liens do not extend to or cover any property or
assets of the Company or any Restricted Subsidiary other than the property or
assets acquired; (xii) Liens in favor of the Company or any Restricted
Subsidiary; (xiii) Liens arising from the rendering of a final judgment or order
against the Company or any Restricted Subsidiary of the Company that does not
give rise to an Event of Default; (xiv) Liens securing reimbursement obligations
with respect to letters of credit that encumber documents and other property
relating to such letters of credit and the products and proceeds thereof; (xv)
Liens in favor of customs and revenue authorities arising as a matter of law to
secure payment of customs duties in connection with the importation of goods;
(xvi) Liens encumbering customary initial
<PAGE>

                                       16


deposits and margin deposits, and other Liens that are either within the general
parameters customary in the industry and incurred in the ordinary course of
business, in each case, securing Indebtedness under Interest Rate Agreements and
Currency Agreements and forward contracts, options, futures contracts, futures
options or similar agreements or arrangements designed to protect the Company or
any of its Restricted Subsidiaries from fluctuations in the price of
commodities; (xvii) Liens arising out of conditional sale, title retention,
consignment or similar arrangements for the sale of goods entered into by the
Company or any of its Restricted Subsidiaries in the ordinary course of business
in accordance with the past practices of the Company and its Restricted
Subsidiaries prior to the Closing Date; and (xviii) Liens on or sales of
receivables.

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

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

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

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

            "Redeemable Stock" means any class or series of Capital Stock of any
Person that by its terms or otherwise is (i) required to be redeemed prior to
the Stated Maturity of the Securities, (ii) redeemable at the option of the
holder of such class or series of Capital Stock at any time prior to the Stated
Maturity of the Securities (unless the redemption price is, at the Company's
option, without conditions precedent, payable solely in Common Stock (other than
Redeemable Stock) of the Company) or (iii) convertible into or exchangeable for
Capital Stock referred to in clause (i) or (ii) above or Indebtedness having a
scheduled maturity prior to the Stated Maturity of the Securities; provided,
however, that any Capital Stock that would not constitute Redeemable Stock but
for provisions thereof giving holders thereof the right to require such Person
to repurchase or redeem such Capital Stock upon the occurrence of an "asset
sale" or "change of control" occurring prior to the Stated Maturity of the
Securities shall not constitute Redeemable Stock if the "asset sale" or "change
of control" provisions applicable to such Capital Stock are no more favorable to
the holders of such Capital Stock than the provisions of Section 4.11 and
Section 4.12 and such Capital Stock specifically provides that such Person will
not repurchase or redeem any such stock pursuant to such provision prior to the
Company's
<PAGE>

                                       17


repurchase of such Securities as are required to be repurchased pursuant to the
provisions of Section 4.11 and Section 4.12.

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

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

            "Registrar" has the meaning provided in Section 2.03.

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

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

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

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

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

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

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

            "Security Register" has the meaning provided in Section 2.03.
<PAGE>

                                       18


            "Significant Subsidiary" means, at any date of determination, any
Restricted Subsidiary of the Company that, together with its Subsidiaries, (i)
for the most recent fiscal year of the Company, accounted for more than 10% of
the consolidated revenues of the Company and its Restricted Subsidiaries or (ii)
as of the end of such fiscal year, was the owner of more than 10% of the
consolidated assets of the Company and its Restricted Subsidiaries, all as set
forth on the most recently available consolidated financial statements of the
Company for such fiscal year.

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

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

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

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

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

            "Temporary Cash Investment" means any of the following: (i) direct
obligations of the United States or any agency thereof or obligations fully and
unconditionally guaranteed by the United States or any agency thereof; (ii) time
deposit accounts, certificates of deposit and money market deposits maturing
within 180 days of the date of acquisition thereof issued by a
<PAGE>

                                       19


bank or trust company which is organized under the laws of the United States,
any state thereof or any foreign country recognized by the United States, and
which bank or trust company has capital, surplus and undivided profits
aggregating in excess of $50,000,000 (or the foreign currency equivalent
thereof) and has outstanding deposits or debt which is rated "A" (or such
similar equivalent rating) or higher by at least one nationally recognized
statistical rating organization (as defined in Rule 436 under the Securities
Act) or any money-market fund sponsored by a registered broker dealer or mutual
fund distributor; (iii) repurchase obligations with a term of not more than 30
days for underlying securities of the types described in clause (i) above
entered into with a bank meeting the qualifications described in clause (ii)
above; (iv) commercial paper, maturing not more than six months after the date
of acquisition, issued by a corporation (other than an Affiliate of the Company)
organized and in existence under the laws of the United States, any state
thereof or any foreign country recognized by the United States with a rating at
the time as of which any investment therein is made of "P-1" (or higher)
according to Moody's Investors Service, Inc. or "A-1" (or higher) according to
Standard & Poor's Ratings Group; and (v) securities with maturities of six
months or less from the date of acquisition issued or fully and unconditionally
guaranteed by any state, commonwealth or territory of the United States, or by
any political subdivision or taxing authority thereof, and rated at least "A" by
Standard & Poor's Ratings Group or Moody's Investors Service, Inc.; provided,
however, that, notwithstanding the foregoing, the maturity of any of the
foregoing that is applied to provide security in favor of the Indebtedness
referred to in clause (v) of the second paragraph of Section 4.09 may occur as
late as the earliest date that such Indebtedness may be redeemed at the option
of the obligor with respect to such Indebtedness; and provided further, however,
that the Company shall cause such Liens referred to in such clause (v) to be
incurred no later than the first anniversary of the Closing Date.

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

            "Transaction Date" means, with respect to the Incurrence of any
Indebtedness by the Company or any of its Restricted Subsidiaries, the date such
Indebtedness is to be Incurred and, with respect to any Restricted Payment, the
date such Restricted Payment is to be made. "Trustee" means the party named as
such in the first paragraph of this Indenture until a successor replaces it in
accordance with the provisions of Article Seven of this Indenture and thereafter
means such successor.

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

                                       20


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

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

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

                                       21


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

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

            "WinStar Equipment" means WinStar Equipment Corp., a Delaware
corporation and a wholly owned subsidiary of the Company.

            "WinStar Wireless" means WinStar Wireless, Inc.

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

            "indenture securities" means the Securities;

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

            "indenture to be qualified" means this Indenture;

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

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

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

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

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

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

            (iii) "or" is not exclusive;
<PAGE>

                                       22


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

            (v) provisions apply to successive events and transactions;

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

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

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

                                   ARTICLE TWO
                                 THE SECURITIES

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

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

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

                                       23


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

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

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

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

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

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

            SECTION 2.04. Paying Agent To Hold Money in Trust. On or prior to
each due date of the principal and interest on any Security, the Company shall
deposit with the Paying Agent a sum sufficient to pay such principal and
interest when so becoming due. The Company shall require each Paying Agent
(other than the Trustee) to agree in writing that the Paying Agent shall hold in
trust for the benefit of Securityholders or the Trustee all money held by the
<PAGE>

                                       24


Paying Agent for the payment of principal of or interest on the Securities and
shall notify the Trustee of any default by the Company in making any such
payment. If the Company or a Subsidiary acts as Paying Agent, it shall segregate
the money held by it as Paying Agent and hold it as a separate trust fund. The
Company at any time may require a Paying Agent to pay all money held by it to
the Trustee and to account for any funds disbursed by the Paying Agent. Upon
complying with this Section, the Paying Agent shall have no further liability
for the money delivered to the Trustee.

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

            SECTION 2.06. Transfer and Exchange. The Securities shall be issued
in registered form and shall be transferable only upon the surrender of a
Security for registration of transfer. When Securities are presented to the
Registrar or a co-registrar with a request (i) to register a transfer or (ii) to
exchange them for an equal principal amount of Securities of other
denominations, the Registrar shall register the transfer or make the transfer,
as requested if the requirements of Section 8-401(1) of the Uniform Commercial
Code are met; provided, however, that any Security presented or surrendered for
registration of transfer or exchange shall be duly endorsed or accompanied by a
written instrument of transfer in form satisfactory to the Registrar and the
Trustee duly executed by the Holder thereof or by his attorney duly authorized
in writing. To permit registration of transfers and exchanges, the Company shall
execute and the Trustee shall authenticate Securities at the Registrar's or
co-registrar's request. The Company may require payment of a sum sufficient to
pay all taxes, assessments or other governmental charges in connection with any
transfer or exchange pursuant to this Section. The Company shall not be required
to make and the Registrar need not register transfers or exchanges of Securities
selected for redemption (except, in the case of Securities to be redeemed in
part, the portion thereof not to be redeemed) or any Securities for a period of
15 days before a selection of Securities to be redeemed or 15 days before an
interest payment date.

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

                                       25


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

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

            Every replacement Security is an additional obligation of the
Company.

            SECTION 2.08. Outstanding Securities. Securities outstanding at any
time are all Securities authenticated by the Trustee except for those canceled
by it, those delivered to it for cancellation and those described in this
Section as not outstanding. A Security does not cease to be outstanding because
the Company or an Affiliate of the Company holds the Security; provided,
however, that, in determining whether the Holders of the requisite principal
amount of the outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor shall be disregarded and deemed not to be
outstanding, except that, in determining whether the Trustee shall be protected
in relying upon any such request, demand, authorization, direction, notice,
consent or waiver, only Securities which the Trustee knows to be so owned shall
be so disregarded. Securities so owned which have been pledged in good faith may
be regarded as outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's right so to act with respect to such Securities and that
the pledgee is not the Company or any other obligor upon the Securities or any
Affiliate of the Company or of such other obligor.

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

            If the Paying Agent segregates and holds in trust, in accordance
with this Indenture, on a redemption date or maturity date money sufficient to
pay all principal and interest payable on that date with respect to the
Securities (or portions thereof) to be redeemed
<PAGE>

                                       26


or maturing, as the case may be, then on and after that date, such Securities
(or portions thereof) shall cease to be outstanding and interest on them shall
cease to accrue.

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

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

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

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

                                       27


                                  ARTICLE THREE
                                   REDEMPTION

            SECTION 3.01. Right of Redemption. The Securities may be redeemed at
the election of the Company, in whole at any time or in part from time to time
on or after October 15, 2000 and prior to maturity, upon not less than 30 nor
more than 60 days' prior notice mailed by first-class mail to each Holder's last
address as it appears in the Security Register, at the following Redemption
Prices (expressed as a percentage of the Accumulated Amount of the Securities),
plus accrued and unpaid interest, if any, on such Accumulated Amount to the
Redemption Date (subject to the right of Holders of record on the relevant
Regular Record Date that is on or prior to the Redemption Date to receive
interest due on the relevant Interest Payment Date) if redeemed during the
12-month period commencing on October 15 of the years set forth below:

                     ============================================
                     Year                        Redemption Price
                     --------------------------------------------
                     2000                             107.250%
                     --------------------------------------------
                     2001                             104.833%
                     --------------------------------------------
                     2002                             102.417%
                     --------------------------------------------
                     2003 and thereafter              100.000%
                     ============================================

            SECTION 3.02. Notices to Trustee. If the Company elects to redeem
Securities pursuant to Section 3.01, it shall notify the Trustee in writing of
the Redemption Date and the principal amount of Securities to be redeemed plus
interest accrued and premium due thereon, if any, to the Redemption Date.

            The Company shall give each notice provided for in this Section 3.02
in an Officers' Certificate at least five days before mailing the notice to
Holders referred to in Section 3.01.

            SECTION 3.03. Selection of Securities to Be Redeemed. If less than
all of the Securities are to be redeemed at any time, the Trustee shall select
the Securities to be redeemed in compliance with the requirements of the
principal national securities exchange, if any, on which the Securities are
listed or, if the Securities are not listed on a national securities exchange,
on a pro rata basis, by lot or by such other method as the Trustee in its sole
discretion shall deem fair and appropriate; provided, however, that no
Securities of $1,000 in principal amount or less shall be redeemed in part.

            The Trustee shall make the selection from the Securities outstanding
and not previously called for redemption. Securities in denominations of $1,000
in principal amount may only be
<PAGE>

                                       28


redeemed in whole. The Trustee may select for redemption portions (equal to
$1,000 in principal amount or any integral multiple thereof) of Securities that
have denominations larger than $1,000 in principal amount. Provisions of this
Indenture that apply to Securities called for redemption also apply to portions
of Securities called for redemption. The Trustee shall notify the Company and
the Registrar promptly in writing of the Securities or portions of Securities to
be called for redemption.

            SECTION 3.04. Notice of Redemption. With respect to any redemption
of Securities pursuant to Section 3.01, at least 30 days but not more than 60
days before a Redemption Date, the Company shall mail a notice of redemption by
first class mail to each Holder whose Securities are to be redeemed.

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

            (a) the Redemption Date;

            (b) the Redemption Price;

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

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

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

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

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

                                       29


            At the Company's request (which request may be revoked by the
Company at any time prior to the time at which the Trustee shall have given such
notice to the Holders), made in writing to the Trustee at least five days before
mailing the notice to the Holders referred to in this Section 3.04, the Trustee
shall give such notice of redemption in the name and at the expense of the
Company. If, however, the Company gives such notice to the Holders, the Company
shall concurrently deliver to the Trustee an Officers' Certificate stating that
such notice has been given.

            SECTION 3.05. Effect of Notice of Redemption. Once notice of
redemption is mailed, Securities called for redemption become due and payable on
the relevant Redemption Date and at the Redemption Price. Upon surrender of any
Securities to the Paying Agent, such Securities shall be paid at the Redemption
Price, plus accrued interest, if any, to the Redemption Date.

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

            SECTION 3.06. Deposit of Redemption Price. On or prior to any
Redemption Date, the Company shall deposit with the Paying Agent (or, if the
Company is acting as its own Paying Agent, shall segregate and hold in trust as
provided in Section 2.04) money sufficient to pay the Redemption Price of and
accrued interest on all Securities to be redeemed on that date other than
Securities or portions thereof called for redemption on that date that have been
delivered by the Company to the Trustee for cancellation.

            SECTION 3.07. Payment of Securities Called for Redemption. If notice
of redemption has been given in the manner provided above, the Securities or
portion of Securities specified in such notice to be redeemed shall become due
and payable on the Redemption Date at the Redemption Price stated therein,
together with accrued interest to such Redemption Date, and on and after such
date (unless the Company shall default in the payment of such Securities at the
Redemption Price and accrued interest to the Redemption Date, in which case the
principal, until paid, shall bear interest from the Redemption Date at the rate
prescribed in the Securities), such Securities shall cease to accrue interest.
Upon surrender of any Security for redemption in accordance with a notice of
redemption, such Security shall be paid and redeemed by the Company at the
Redemption Price, together with accrued interest, if any, to the Redemption
Date; provided, however, that installments of interest whose Stated Maturity is
on or prior to the Redemption Date shall be payable to the Holders registered as
such at the close of business on the relevant Regular Record Date.
<PAGE>

                                       30


            SECTION 3.08. Securities Redeemed in Part. Upon surrender of any
Security that is redeemed in part, the Company shall execute and the Trustee
shall authenticate and deliver to the Holder a new Security equal in principal
amount to the unredeemed portion of such surrendered Security.

                                  ARTICLE FOUR
                                    COVENANTS

            SECTION 4.01. Payment of Securities. The Company shall pay the
principal of, premium, if any, and interest on the Securities on the dates and
in the manner provided in the Securities and this Indenture. An installment of
principal, premium, if any, or interest shall be considered paid on the date due
if the Trustee or Paying Agent (other than the Company, a Subsidiary of the
Company, or any Affiliate of any of them) holds on that date money designated
for and sufficient to pay the installment. If the Company or any Subsidiary of
the Company or any Affiliate of any of them, acts as Paying Agent, an
installment of principal, premium, if any, or interest shall be considered paid
on the due date if the entity acting as Paying Agent complies with Section 2.04.
As provided in Section 6.09, upon any bankruptcy or reorganization procedure
relative to the Company, the Trustee shall serve as the Paying Agent and
conversion agent, if any, for the Securities.

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

            SECTION 4.02. Maintenance of Office or Agency. The Company will
maintain an office or agency (which may be an office of the Trustee, Registrar
or co-registrar or any Affiliate of any of them) where Securities may be
surrendered for registration of transfer or exchange or for presentation for
payment and where notices and demands to or upon the Company in respect of the
Securities and this Indenture may be served. The Company will give prompt
written notice to the Trustee of the location, and any change in the location,
of such office or agency. If at any time the Company shall fail to maintain any
such required office or agency or shall fail to furnish the Trustee with the
address thereof, such presentations, surrenders, notices and demands may be made
or served at the address of the Trustee set forth in Section 10.02.

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

                                       31


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

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

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

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

            (ii) Indebtedness (A) to the Company evidenced by an unsubordinated
      promissory note or (B) to any of its Restricted Subsidiaries; provided,
      however, that any event which results in any such Restricted Subsidiary
      ceasing to be a Restricted Subsidiary or any subsequent transfer of such
      Indebtedness (other than to the Company or another Restricted Subsidiary)
      shall be deemed, in each case, to constitute an Incurrence of such
      Indebtedness not permitted by this clause (ii);

            (iii) Indebtedness issued in exchange for, or the net proceeds of
      which are used to refinance or refund, then outstanding Indebtedness,
      other than Indebtedness Incurred under clause (i), (ii), (v), (vi) or
      (viii) of this paragraph, and any refinancings thereof in an amount not to
      exceed the amount so refinanced or refunded (plus premiums, accrued
      interest, fees and expenses); provided, however, that Indebtedness the
      proceeds of which are used to refinance or refund the Securities or
      Indebtedness that is pari passu with, or subordinated in right of payment
      to, the Securities shall only be permitted under this clause (iii) if (A)
      in case the Securities are refinanced in part or the Indebtedness to be
      refinanced is pari passu with the Securities, such new Indebtedness, by
      its terms or by the terms of any agreement or instrument pursuant to which
      such new Indebtedness is outstanding, is expressly made pari passu with,
      or subordinate in right of payment to, the remaining Securities, (B) in
      case the Indebtedness to be refinanced is subordinated in right of payment
      to the Securities, such new Indebtedness, by its terms or by the terms of
      any agreement or instrument pursuant to which such new Indebtedness is
      outstanding, is expressly made subordinate in right of payment to the
      Securities at least to the extent that the Indebtedness to be refinanced
      is subordinated to the Securities and (C) such new
<PAGE>

                                       32


      Indebtedness, determined as of the date of Incurrence of such new
      Indebtedness, does not mature prior to the Stated Maturity of the
      Indebtedness to be refinanced or refunded, and the Average Life of such
      new Indebtedness is at least equal to the remaining Average Life of the
      Indebtedness to be refinanced or refunded; provided further, however, that
      in no event may Indebtedness of the Company be refinanced by means of any
      Indebtedness of any Restricted Subsidiary of the Company pursuant to this
      clause (iii);

            (iv) Indebtedness (A) in respect of performance, surety or appeal
      bonds provided in the ordinary course of business, (B) under Currency
      Agreements and Interest Rate Agreements; provided, however, that such
      agreements do not increase the Indebtedness of the obligor outstanding at
      any time other than as a result of fluctuations in foreign currency
      exchange rates or interest rates or by reason of fees, indemnities and
      compensation payable thereunder; and (C) arising from agreements providing
      for indemnification, adjustment of purchase price or similar obligations,
      or from Guarantees or letters of credit, surety bonds or performance bonds
      securing any obligations of the Company or any of the Restricted
      Subsidiaries pursuant to such agreements, in any case Incurred in
      connection with the disposition of any business, assets or Restricted
      Subsidiary of the Company (other than Guarantees of Indebtedness Incurred
      by any Person acquiring all or any portion of such business, assets or
      Restricted Subsidiary of the Company for the purpose of financing such
      acquisition), in a principal amount not to exceed the gross proceeds
      actually received by the Company or any Restricted Subsidiary in
      connection with such disposition;

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

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

            (vii) Indebtedness to the extent such Indebtedness is secured by
      Liens which are purchase money or other Liens upon equipment or inventory
      acquired or held by the Company or any of its Restricted Subsidiaries
      taken or obtained by (A) the seller or
<PAGE>

                                       33


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

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

            (ix) Indebtedness of the Company, to the extent the proceeds thereof
      are immediately used to purchase Securities and the Equipment Notes
      tendered in an Offer to Purchase made as a result of a Change of Control.

            (b) For purposes of determining any particular amount of
Indebtedness under this Section 4.03, Guarantees, Liens or obligations with
respect to letters of credit supporting Indebtedness otherwise included in the
determination of such particular amount shall not be included. For purposes of
determining compliance with this Section 4.03, in the event that an item of
Indebtedness meets the criteria of more than one of the types of Indebtedness
described in the above clauses, the Company, in its sole discretion, shall
classify such item of Indebtedness and only be required to include the amount
and type of such Indebtedness in one of such clauses.

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

            SECTION 4.04. Limitation on Restricted Payments. The Company will
not, and will not permit any Restricted Subsidiary to, directly or indirectly,
(i) declare or pay any dividend or make any distribution on its Capital Stock
(other than dividends or distributions payable solely in shares of its or such
Restricted Subsidiary's Capital Stock (other than Redeemable Stock) held by such
holders or in options, warrants or other rights to acquire such shares of
Capital Stock) other than such Capital Stock held by the Company or any of its
Restricted Subsidiaries (and other than pro rata dividends or distributions on
Common Stock of Restricted Subsidiaries); (ii) repurchase, redeem, retire or
otherwise acquire for value any shares of Capital Stock of the Company
(including options, warrants or other rights to acquire such shares of Capital
Stock) held by Persons other than any Wholly Owned Restricted Subsidiaries of
the Company; (iii) make any voluntary or optional principal payment, or
voluntary or optional redemption, repurchase, defeasance, or other acquisition
or retirement for value, of Indebtedness
<PAGE>

                                       34


of the Company that is subordinated in right of payment to the Securities; or
(iv) make any Investment, other than a Permitted Investment, in any Person (such
payments or any other actions described in clauses (i) through (iv) being
collectively "Restricted Payments") if, at the time of, and after giving effect
to, the proposed Restricted Payment: (A) a Default or Event of Default shall
have occurred and be continuing, (B) except with respect to any Investment
(other than an Investment consisting of the designation of a Restricted
Subsidiary as an Unrestricted Subsidiary), the Company could not Incur at least
$1.00 of Indebtedness under the first paragraph of Section 4.03 or (C) the
aggregate amount expended for all Restricted Payments (the amount so expended,
if other than in cash, to be determined in good faith by the Board of Directors,
whose determination shall be conclusive and evidenced by a Board Resolution)
after the Closing Date shall exceed the sum of (1) 50% of the aggregate amount
of the Adjusted Consolidated Net Income (or, if the Adjusted Consolidated Net
Income is a loss, minus 100% of such amount) (determined by excluding income
resulting from transfers of assets by the Company or a Restricted Subsidiary to
an Unrestricted Subsidiary) accrued on a cumulative basis during the period
(taken as one accounting period) beginning on the first day of the fiscal
quarter immediately following the Closing Date and ending on the last day of the
last fiscal quarter preceding the Transaction Date for which reports have been
filed pursuant to Section 4.18 plus (2) the aggregate Net Cash Proceeds received
by the Company after the Closing Date from the issuance and sale permitted by
this Indenture of its Capital Stock (other than Redeemable Stock) to a Person
who is not a Subsidiary of the Company, or from the issuance to a Person who is
not a Subsidiary of the Company of any options, warrants or other rights to
acquire Capital Stock of the Company (in each case, exclusive of any convertible
Indebtedness, Redeemable Stock or any options, warrants or other rights that are
redeemable at the option of the Holder, or are required to be redeemed, prior to
the Stated Maturity of the Securities) plus (3) an amount equal to the net
reduction in Investments (other than reductions in Permitted Investments and
other than reductions in Investments made pursuant to clauses (vi) or (vii) of
the second paragraph of this Section 4.04) in any Person resulting from payments
of interest on Indebtedness, dividends, repayments of loans or advances, or
other transfers of assets, in each case to the Company or any Restricted
Subsidiary (except to the extent any such payment is included in the calculation
of Adjusted Consolidated Net Income), or from redesignations of Unrestricted
Subsidiaries as Restricted Subsidiaries (valued in each case as provided in the
definition of "Investments"), not to exceed the amount of Investments previously
made by the Company and its Restricted Subsidiaries in such Person.

            The foregoing provision shall not be violated by reason of:

            (i) the payment of any dividend within 60 days after the date of
      declaration thereof if, at said date of declaration, such payment would
      comply with the foregoing paragraph;
<PAGE>

                                       35


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

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

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

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

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

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

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

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

            (x) Investments in entities that directly (or indirectly through
      subsidiaries) own licenses granted by the FCC or any other governmental
      entity with authority to grant
<PAGE>

                                       36


      telecommunications licenses; provided, however, that, in each case the
      Company or a Restricted Subsidiary shall, at the time of making such
      Investment, have an active role in the management or operation of such
      entity and in the provision of telecommunications services by such entity;

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

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

            SECTION 4.05. Limitation on Dividend and Other Payment Restrictions
Affecting Restricted Subsidiaries. The Company will not, and will not permit any
Restricted Subsidiary to, create or otherwise cause or suffer to exist or become
effective any consensual encumbrance or restriction of any kind on the ability
of any Restricted Subsidiary to:

            (i) pay dividends or make any other distributions permitted by
      applicable law on any Capital Stock of such Restricted Subsidiary owned by
      the Company or any other Restricted Subsidiary;

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

            (iii) make loans or advances to the Company or any other Restricted
      Subsidiary that owns, directly or indirectly, any Capital Stock of such
      Restricted Subsidiary; or
<PAGE>

                                       37


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

            The foregoing provisions shall not prohibit any encumbrances or
restrictions:

            (i) existing on the Closing Date in this Indenture or any other
      agreement in effect on the Closing Date, and any extensions, refinancings,
      renewals or replacements of such agreements; provided, however, that the
      encumbrances and restrictions in any such extensions, refinancings,
      renewals or replacements are no less favorable in any material respect to
      the Holders than those encumbrances or restrictions that are then in
      effect and that are being extended, refinanced, renewed or replaced;

            (ii) existing under or by reason of applicable law;

            (iii) existing with respect to any Person or the property or assets
      of such Person acquired by the Company or any Restricted Subsidiary, at
      the time of such acquisition and not incurred in contemplation thereof,
      which encumbrances or restrictions are not applicable to any Person or the
      property or assets of any Person other than such Person or the property or
      assets of such Person so acquired;

            (iv) in the case of clause (iv) of the first paragraph of this
      Section 4.05, (A) that restrict in a customary manner the subletting,
      assignment or transfer of any property or asset that is a lease, license,
      conveyance or contract or similar property or asset, (B) existing by
      virtue of any transfer of, agreement to transfer, option or right with
      respect to, or Lien on, any property or assets of the Company or any
      Restricted Subsidiary not otherwise prohibited by this Indenture or (C)
      arising or agreed to in the ordinary course of business, not relating to
      any Indebtedness, and that do not, individually or in the aggregate,
      detract from the value of property or assets of the Company or any
      Restricted Subsidiary in any manner material to the Company or any
      Restricted Subsidiary; or

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

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

                                       38


            SECTION 4.06. Limitation on the Issuance of Capital Stock of
Restricted Subsidiaries. The Company will not sell, and will not permit any
Restricted Subsidiary, directly or indirectly, to issue or sell any shares of
Capital Stock of a Restricted Subsidiary (including options, warrants or other
rights to purchase shares of such Capital Stock) except:

            (i) to the Company or a Wholly Owned Restricted Subsidiary;

            (ii) issuances or sales to foreign nationals of shares of Capital
      Stock of foreign Restricted Subsidiaries, to the extent required by
      applicable law;

            (iii) if, immediately after giving effect to such issuance or sale,
      such Restricted Subsidiary would no longer constitute a Restricted
      Subsidiary; or

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

            SECTION 4.07. Limitation on Issuances of Guarantees by Restricted
Subsidiaries. The Company will not permit any Restricted Subsidiary, directly or
indirectly, to Guarantee any Indebtedness of the Company ("Guaranteed
Indebtedness"), unless (i) such Restricted Subsidiary simultaneously executes
and delivers a supplemental indenture to this Indenture providing for a
Guarantee (a "Subsidiary Guarantee") of payment of the Securities by such
Restricted Subsidiary and (ii) such Restricted Subsidiary waives and will not in
any manner whatsoever claim or take the benefit or advantage of, any rights of
reimbursement, indemnity or subrogation or any other rights against the Company
or any other Restricted Subsidiary as a result of any payment by such Restricted
Subsidiary under its Subsidiary Guarantee; provided, however, that this
paragraph shall not be applicable to any Guarantee of any Restricted Subsidiary
that (x) existed at the time such Person became a Restricted Subsidiary and (y)
was not Incurred in connection with, or in contemplation of, such Person
becoming a Restricted Subsidiary. If the Guaranteed Indebtedness is (A) pari
passu with the Securities then the Guarantee of such Guaranteed Indebtedness
shall be pari passu with, or subordinated to, the Subsidiary Guarantee or (B)
subordinated to the Securities then the Guarantee of such Guaranteed
Indebtedness shall be subordinated to the Subsidiary Guarantee at least to the
extent that the Guaranteed Indebtedness is subordinated to the Securities.

            Notwithstanding the foregoing, any Subsidiary Guarantee by a
Restricted Subsidiary shall provide by its terms that it shall be automatically
and unconditionally released and discharged upon (i) any sale, exchange or
transfer, to any Person not an Affiliate of the Company of all of the Company's
and each Restricted Subsidiary's Capital Stock in, or all or
<PAGE>

                                       39


substantially all the assets of, such Restricted Subsidiary (which sale,
exchange or transfer is not prohibited by this Indenture) or (ii) the release or
discharge of the Guarantee which resulted in the creation of such Subsidiary
Guarantee, except a discharge or release by or as a result of payment under such
Guarantee.

            SECTION 4.08. Limitation on Transactions with Shareholders and
Affiliates. The Company will not, and will not permit any Restricted Subsidiary
to, directly or indirectly, enter into, renew or extend any transaction
(including, without limitation, the purchase, sale, lease or exchange of
property or assets, or the rendering of any service) with any holder (or any
Affiliate of such holder) of 5% or more of any class of Capital Stock of the
Company or with any Affiliate of the Company or any Restricted Subsidiary,
except upon fair and reasonable terms no less favorable to the Company or such
Restricted Subsidiary than could be obtained, at the time of such transaction
or, if such transaction is pursuant to a written agreement, at the time of the
execution of the agreement providing therefor, in a comparable arm's-length
transaction with a Person that is not such a holder or an Affiliate.

            The foregoing limitation does not limit, and shall not apply to (i)
transactions (A) approved by a majority of the disinterested members of the
Board of Directors or (B) for which the Company or a Restricted Subsidiary
delivers to the Trustee a written opinion of a nationally recognized investment
banking firm stating that the transaction is fair to the Company or such
Restricted Subsidiary from a financial point of view; (ii) any transaction
solely between the Company and any of its Wholly Owned Restricted Subsidiaries
or solely between Wholly Owned Restricted Subsidiaries; (iii) the payment of
reasonable fees to directors of the Company who are not employees of the
Company; (iv) any payments or other transactions pursuant to any tax-sharing
agreement between the Company and any other Person with which the Company files
a consolidated tax return or with which the Company is part of a consolidated
group for tax purposes; or (v) any Restricted Payments not prohibited by the
provisions of Section 4.04 (other than pursuant to clause (iv) of the definition
of "Permitted Investment" or clause (vi) of the second paragraph of Section
4.04). Notwithstanding the foregoing, any transaction covered by the first
paragraph of this Section 4.08 and not covered by clauses (ii) through (iv) of
this paragraph, the aggregate amount of which exceeds $250,000 in value, must be
approved or determined to be fair in the manner provided for in clause (i)(A) or
(B) above.

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

                                       40


            The foregoing limitation does not apply to:

            (i) Liens existing on the Closing Date;

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

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

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

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

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

            (vii) Permitted Liens.

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

                                       41


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

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

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

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

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

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

            SECTION 4.11. Limitation on Assets Sales. The Company will not, and
will not permit any Restricted Subsidiary to, consummate any Asset Sale, unless
(i) the consideration received by the Company or such Restricted Subsidiary is
at least equal to the fair market value of the assets sold or disposed of and
(ii) at least 85% of the consideration received consists of cash or Temporary
Cash Investments. In the event and to the extent that the Net Cash Proceeds
received by the Company or its Restricted Subsidiaries from one or more Asset
Sales occurring on or after the Closing Date in any period of 12 consecutive
months exceed 10% of Adjusted Consolidated Net Tangible Assets (determined as of
the date closest to the commencement of such 12-month period for which a
consolidated balance sheet of the Company and its Subsidiaries has been
prepared), then the Company shall or shall cause the relevant Restricted
Subsidiary to (i) within six months after the date Net Cash Proceeds so received
exceed 10% of Adjusted Consolidated Net Tangible Assets (A) apply an amount
equal to such excess Net Cash Proceeds to permanently repay unsubordinated
Indebtedness of the Company, or Indebtedness of any Restricted Subsidiary, in
each case owing to a Person other than the Company or any of its Restricted
Subsidiaries or (B) invest an equal amount, or the amount not so applied
pursuant to clause (A) (or enter into a definitive agreement committing to so
invest within six months after the date of such agreement), in property or
assets of a nature or type or that are used in a business (or in a company
having property and assets of a nature or type, or engaged in a business)
similar or related to the nature or type of the property and assets of, or the
business of, the Company and its Restricted Subsidiaries existing on the date of
such investment (as determined in good faith by the Board of Directors, whose
determination shall be conclusive and evidenced by a Board Resolution) and (ii)
apply (no later than the end of the six-month period
<PAGE>

                                       42


referred to in clause (i)) such excess Net Cash Proceeds (to the extent not
applied pursuant to clause (i)) as provided in the following paragraph of this
Section 4.11. The amount of such excess Net Cash Proceeds required to be applied
(or to be committed to be applied) during such six-month period as set forth in
clause (i) of the preceding sentence and not applied as so required by the end
of such period shall constitute "Excess Proceeds."

            If, as of the first day of any calendar month, the aggregate amount
of Excess Proceeds not theretofore subject to an Offer to Purchase pursuant to
this Section 4.11 totals at least $10,000,000, the Company must commence, not
later than the 15th Business Day after the first day of such month, and
consummate an Offer to Purchase from the Holders on a pro rata basis an
aggregate principal amount of Securities equal to the Excess Proceeds on such
date, at a purchase price equal to 101% of the Accumulated Amount of such
Securities on such date of purchase, plus accrued and unpaid interest (if any)
on such amount to the date of purchase.

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

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

                                       43


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

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

            SECTION 4.15. Maintenance of Properties and Insurance. The Company
will cause all properties used or useful in the conduct of its business or the
business of any of its Restricted Subsidiaries, to be maintained and kept in
reasonable condition, repair and working order and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in the judgment of
the Company may be necessary so that the business carried on in connection
therewith may be properly and advantageously conducted at all times; provided,
however, that nothing in this Section 4.15 shall prevent the Company or any such
Subsidiary from discontinuing the use, operation or maintenance of any of such
properties or disposing of any of them, if such discontinuance or disposal is,
in the judgment of the Company, desirable in the conduct of the business of the
Company or such Subsidiary.

            The Company will provide or cause to be provided, for itself and its
Restricted Subsidiaries, insurance (including appropriate self-insurance)
against loss or damage of the kinds customarily insured against by corporations
similarly situated and owning like properties,
<PAGE>

                                       44


including, but not limited to, product liability insurance and public liability
insurance, with reputable insurers or with the government of the United States
of America, or an agency or instrumentality thereof, in such amounts, with such
deductibles and by such methods as shall be customary for corporations similarly
situated in the industry in which the Company or such Restricted Subsidiary, as
the case may be, is then conducting business.

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

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

            (b) The Company shall (to the extent not prohibited by applicable
accounting rules) deliver to the Trustee, within 90 days after the end of its
fiscal year, a certificate signed by the Company's independent certified public
accountants stating (i) that their audit examination has included a review of
the terms of this Indenture and the Securities as they relate to accounting
matters, (ii) that they have read the most recent Officers' Certificate
delivered to the Trustee pursuant to paragraph (a) of this Section 4.17 and
(iii) whether, in connection with their audit examination, anything came to
their attention that caused them to believe that the Company, as the case may
be, was not in compliance with any of the terms, covenants, provisions or
conditions of Article Four and Section 5.01 of this Indenture as they pertain to
accounting matters and, if any Default or Event of Default has come to their
attention, specifying the nature and period of existence thereof; provided,
however, that such independent certified public accountants shall not be liable
in respect of such statement by reason of any failure to obtain knowledge of any
such Default or Event of Default that would not be disclosed in the course of an
audit examination conducted in accordance with generally accepted auditing
standards in effect at the date of such examination.
<PAGE>

                                       45


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

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

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

                                  ARTICLE FIVE
                              SUCCESSOR CORPORATION

            SECTION 5.01. When Company May Merge, Etc. The Company shall not
consolidate with, merge with or into, or sell, convey, transfer, lease or
otherwise dispose of all or substantially all of its property and assets (as an
entirety or substantially an entirety in one transaction or a series of related
transactions) to, any Person (other than a consolidation or merger with or into
a Wholly Owned Restricted Subsidiary with a positive net worth; provided,
however, that, in connection with any such merger or consolidation, no
consideration (other than Common Stock in the surviving Person, or the Company)
shall be issued or distributed to the stockholders of the Company) or permit any
Person to merge with or into the Company unless:

            (i) the Company shall be the continuing Person, or the Person (if
      other than the Company) formed by such consolidation or into which the
      Company is merged or that acquired or leased such property and assets of
      the Company shall be a corporation organized and validly existing under
      the laws of the United States of America or any
<PAGE>

                                       46


      jurisdiction thereof and shall expressly assume, by a supplemental
      indenture, executed and delivered to the Trustee, all of the obligations
      of the Company on all of the Securities and under this Indenture;

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

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

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

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

provided, however, that clauses (iii) and (iv) above do not apply if, in the
good faith determination of the Board of Directors of the Company, whose
determination shall be evidenced by a Board Resolution, the principal purpose of
such transaction is to change the state of incorporation of the Company;
provided further, however, that any such transaction shall not have as one of
its purposes the evasion of the foregoing limitations.

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

                                       47


                                   ARTICLE SIX
                              DEFAULT AND REMEDIES

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

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

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

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

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

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

                                       48


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

            (g) the Company or any Significant Subsidiary (i) commences a
      voluntary case under any applicable bankruptcy, insolvency or other
      similar law now or hereafter in effect, or consents to the entry of an
      order for relief in an involuntary case under any such law, (ii) consents
      to the appointment of or taking possession by a receiver, liquidator,
      assignee, custodian, trustee, sequestrator or similar official of the
      Company or any Significant Subsidiary or for all or substantially all of
      the property and assets of the Company or any Significant Subsidiary or
      (iii) effects any general assignment for the benefit of creditors.

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

            At any time after such a declaration of acceleration, but before a
judgment or decree for the payment of the money due has been obtained by the
Trustee, the Holders of at least a majority in principal amount of the
outstanding Securities by written notice to the
<PAGE>

                                             49


Company and to the Trustee, may waive all past Defaults and rescind and annul
such declaration of acceleration and its consequences if (a) the Company has
paid or deposited with the Trustee a sum sufficient to pay (i) all sums paid or
advanced by the Trustee hereunder and the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, (ii) all
overdue interest on all Securities, (iii) the principal of and premium, if any,
on any Securities that have become due otherwise than by such declaration or
occurrence of acceleration and interest thereon at the rate prescribed therefor
by such Securities, and (iv) to the extent that payment of such interest is
lawful, interest upon overdue interest at the rate prescribed therefor by such
Securities, (b) all existing Events of Default, other than the non-payment of
the principal of, premium, if any, and accrued interest on the Securities that
have become due solely by such declaration of acceleration, have been cured or
waived and (c) the rescission would not conflict with any judgment or decree of
a court of competent jurisdiction.

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

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

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

            SECTION 6.05. Control by Majority. The Holders of at least a
majority in aggregate principal amount of the outstanding Securities may direct
the time, method and place of conducting any proceeding for any remedy available
to the Trustee or exercising any trust or power conferred on the Trustee;
provided, however, that the Trustee may refuse to follow any direction that
conflicts with law or this Indenture, that may involve the Trustee in personal
<PAGE>

                                       50


liability, or that the Trustee determines in good faith may be unduly
prejudicial to the rights of Holders not joining in the giving of such
direction; and provided further, however, that the Trustee may take any other
action it deems proper that is not inconsistent with any directions received
from Holders of Securities pursuant to this Section 6.05.

            SECTION 6.06. Limitation on Suits. A Holder or Holders may not
institute any proceeding, judicial or otherwise, with respect to this Indenture
or the Securities, or for the appointment of a receiver or trustee, or for any
other remedy hereunder, unless:

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

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

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

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

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

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

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

            SECTION 6.07. Rights of Holders to Receive Payment. Notwithstanding
any other provision of this Indenture, the right of any Holder of a Security to
receive payment of principal of, premium, if any, or interest on such Holder's
Security on or after the respective due dates expressed on such Security, or to
bring suit for the enforcement of any such payment
<PAGE>

                                       51


on or after such respective dates, shall not be impaired or affected without the
consent of such Holder.

            SECTION 6.08. Collection Suit by Trustee. If an Event of Default in
payment of principal, premium or interest specified in clause (a), (b) or (c) of
Section 6.01 occurs and is continuing, the Trustee may recover judgment in its
own name and as trustee of an express trust against the Company or any other
obligor of the Securities for the whole amount of principal, premium, if any,
and accrued interest remaining unpaid, together with interest on overdue
principal, premium, if any, and, to the extent that payment of such interest is
lawful, interest on overdue installments of interest, in each case at the rate
specified in the Securities, and such further amount as shall be sufficient to
cover the costs and expenses of collection, including the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel.

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

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

            First: to the Trustee for all amounts due under Section 7.07;

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

                                       52


      to the amounts due and payable on such Securities for principal, premium,
      if any, and interest, respectively; and

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

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

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

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

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

            SECTION 6.14. Delay or Omission Not Waiver. No delay or omission of
the Trustee or of any Holder to exercise any right or remedy accruing upon any
Event of Default shall impair any such right or remedy or constitute a waiver of
any such Event of Default or an acquiescence therein. Every right and remedy
given by this Article Six or by law to the Trustee
<PAGE>

                                       53


or to the Holders may be exercised from time to time, and as often as may be
deemed expedient, by the Trustee or by the Holders, as the case may be.

                                  ARTICLE SEVEN
                                     TRUSTEE

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

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

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

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

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

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

            (v) the Trustee shall not be liable for any action it takes or omits
      to take in good faith that it believes to be authorized or within its
      rights or powers or for any action it takes or omits to take in accordance
      with the direction of the Holders of a majority in
<PAGE>

                                       54


      principal amount of the Outstanding Securities relating to the time,
      method and place of conducting any proceeding for any remedy available to
      the Trustee, or exercising any trust or power conferred upon the Trustee,
      under this Indenture; provided, however, that the Trustee's conduct does
      not constitute negligence or bad faith;

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

            (vii) the Trustee shall not be bound to make any investigation into
      the facts or matters stated in any resolution, certificate, statement,
      instrument, opinion, report, notice, request, direction, consent, order,
      bond, debenture, note, other evidence of indebtedness or other paper or
      document, but the Trustee, in its discretion, may make such further
      inquiry or investigation into such facts or matters as it may see fit,
      and, if the Trustee shall determine to make such further inquiry or
      investigation, it shall be entitled to examine the books, records and
      premises of the Company personally or by agent or attorney; and

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

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

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

            SECTION 7.05. Notice of Default. If any Default or any Event of
Default occurs and is continuing and if such Default or Event of Default is
known to a trust officer of the Trustee, the Trustee shall mail to each Holder
in the manner and to the extent provided in TIA Section 313(c) notice of the
Default or Event of Default within five Business Days after it occurs, unless
such Default or Event of Default has been cured; provided, however, that, except
in the case of a default in the payment of the principal of, premium, if any, or
interest on any
<PAGE>

                                       55


Security, the Trustee shall be protected in withholding such notice if and so
long as the board of directors, the executive committee or a trust committee of
directors and/or the Responsible Officer of the Trustee in good faith determines
that the withholding of such notice is in the interest of the Holders.

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

            SECTION 7.07. Compensation and Indemnity. The Company shall pay to
the Trustee from time to time and upon the Trustee's request such compensation
as shall be agreed upon in writing for its services in any capacity hereunder.
The compensation of the Trustee shall not be limited by any law on compensation
of a trustee of an express trust. The Company shall reimburse the Trustee upon
request for all reasonable out-of-pocket expenses and advances incurred or made
by the Trustee; provided, however, that the Trustee shall be under no obligation
whatsoever under this Indenture or any other document delivered in connection
with the Securities, to advance or expend its own funds. Such expenses shall
include the reasonable compensation and expenses of the Trustee's agents and
counsel.

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

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

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

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

                                       56


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

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

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

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

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

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

            SECTION 7.09. Successor Trustee by Merger, Etc. If the Trustee
consolidates with, merges or converts into, or transfers all or substantially
all of its corporate trust business
<PAGE>

                                       57


to, another corporation or national banking association, the resulting,
surviving or transferee corporation or national banking association without any
further act shall be the successor Trustee with the same effect as if the
successor Trustee had been named as the Trustee herein.

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

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

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

                                  ARTICLE EIGHT
                             DISCHARGE OF INDENTURE

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

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

                                       58


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

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

            SECTION 8.02. Defeasance and Discharge of Indenture. The Company
will be deemed to have paid and will be discharged from any and all obligations
in respect of the Securities on the 123rd day (or, to the extent applicable
under clause (D) below, one year) after the date of the deposit referred to in
clause (A) of this Section 8.02 if:

            (A) with reference to this Section 8.02, the Company has irrevocably
      deposited or caused to be irrevocably deposited with the Trustee (or
      another trustee satisfying the requirements of Section 7.10 of this
      Indenture) and conveyed all right, title and interest for the benefit of
      the Holders, under the terms of an irrevocable trust agreement in form and
      substance satisfactory to the Trustee as trust funds in trust,
      specifically pledged to the Trustee for the benefit of the Holders as
      security for payment of the principal of, premium, if any, and interest,
      if any, on the Securities, and dedicated solely to, the benefit of the
      Holders, in and to (1) money in an amount, (2) U.S. Government Obligations
      that, through the payment of interest, premium, if any, and principal in
<PAGE>

                                       59


      respect thereof in accordance with their terms, will provide, not later
      than one day before the due date of any payment referred to in this clause
      (A), money in an amount or (3) a combination thereof in an amount
      sufficient, in the opinion of a nationally recognized firm of independent
      public accountants expressed in a written certification thereof delivered
      to the Trustee, to pay and discharge, without consideration of the
      reinvestment of such interest and after payment of all federal, state and
      local taxes or other charges and assessments in respect thereof payable by
      the Trustee, the principal of, premium, if any, and accrued interest on
      the outstanding Securities at the Stated Maturity or earlier optional
      redemption of such principal or interest; provided, however, that the
      Trustee shall have been irrevocably instructed to apply such money or the
      proceeds of such U.S. Government Obligations to the payment of such
      principal, premium, if any, and interest with respect to the Securities;

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

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

            (D) the Company shall have delivered to the Trustee (1) either (x) a
      ruling directed to the Trustee received from the Internal Revenue Service
      to the effect that the Holders will not recognize income, gain or loss for
      federal income tax purposes as a result of the Company's exercise of its
      option under this Section 8.02 and will be subject to federal income tax
      on the same amount and in the same manner and at the same times as would
      have been the case if such option had not been exercised or (y) an Opinion
      of Counsel to the same effect as the ruling described in clause (x) above
      accompanied by a ruling to that effect published by the Internal Revenue
      Service, unless there has been a change in the applicable federal income
      tax law since the date of this Indenture such that a ruling from the
      Internal Revenue Service is no longer required and (2) an Opinion of
      Counsel to the effect that (x) the creation of the defeasance trust does
      not violate the Investment Company Act of 1940 and (y) after the passage
      of 123 days following the deposit (except, with respect to any trust funds
      for the account of any Holder who may be deemed to be an "insider" for
      purposes of the United States Bankruptcy Code, after one year following
      the deposit), the trust funds will not be subject to the effect of Section
      547 of the United States Bankruptcy Code or Section 15 of the New York
      Debtor and Creditor Law in a case commenced by or against the Company
      under either such statute, and either (i) the trust funds will no longer
      remain the property of the Company (and therefore will not be subject to
      the effect of any applicable bankruptcy, insolvency,
<PAGE>

                                       60


      reorganization or similar laws affecting creditors' rights generally) or
      (ii) if a court were to rule under any such law in any case or proceeding
      that the trust funds remained property of the Company (a) assuming such
      trust funds remained in the possession of the Trustee prior to such court
      ruling to the extent not paid to the Holders, the Trustee will hold, for
      the benefit of the Holders, a valid and perfected security interest in
      such trust funds that is not avoidable in bankruptcy or otherwise except
      for the effect of Section 552(b) of the United States Bankruptcy Code on
      interest on the trust funds accruing after the commencement of a case
      under such statute and (b) the Holders will be entitled to receive
      adequate protection of their interests in such trust funds if such trust
      funds are used in such case or proceeding;

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

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

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

            After any such irrevocable deposit, the Trustee upon written request
shall acknowledge in writing the discharge of the Company's obligations under
the Securities and this Indenture except for those surviving obligations in the
immediately preceding paragraph.

            SECTION 8.03. Defeasance of Certain Obligations. The Company may
omit to comply with any term, provision or condition set forth in clauses (iii)
and (iv) of Section 5.01 and Sections 4.03 through 4.19, and clause (c) of
Section 6.01 with respect to clauses (iii) and (iv) of Section 5.01 and Sections
4.03 through 4.19, and clauses (d) and (e) of Section 6.01 shall
<PAGE>

                                       61


be deemed not to be Events of Default, in each case with respect to the
outstanding Securities if:

            (i) with reference to this Section 8.03, the Company has irrevocably
      deposited or caused to be irrevocably deposited with the Trustee (or
      another trustee satisfying the requirements of Section 7.10) and conveyed
      all right, title and interest to the Trustee for the benefit of the
      Holders, under the terms of an irrevocable trust agreement in form and
      substance satisfactory to the Trustee as trust funds in trust,
      specifically pledged to the Trustee for the benefit of the Holders as
      security for payment of the principal of, premium, if any, and interest,
      if any, on the Securities, and dedicated solely to, the benefit of the
      Holders, in and to (A) money in an amount, (B) U.S. Government Obligations
      that, through the payment of interest and principal in respect thereof in
      accordance with their terms, will provide, not later than one day before
      the due date of any payment referred to in this clause (i), money in an
      amount or (C) a combination thereof in an amount sufficient, in the
      opinion of a nationally recognized firm of independent public accountants
      expressed in a written certification thereof delivered to the Trustee, to
      pay and discharge, without consideration of the reinvestment of such
      interest and after payment of all federal, state and local taxes or other
      charges and assessments in respect thereof payable by the Trustee, the
      principal of, premium, if any, and interest on the outstanding Securities
      on the Stated Maturity or earlier optional redemption of such principal or
      interest; provided, however, that the Trustee shall have been irrevocably
      instructed to apply such money or the proceeds of such U.S. Government
      Obligations to the payment of such principal, premium, if any, and
      interest with respect to the Securities;

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

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

            (iv) the Company has delivered to the Trustee an Opinion of Counsel
      to the effect that (A) the creation of the defeasance trust does not
      violate the Investment Company Act of 1940, (B) the Holders have a valid
      first-priority security interest in the trust funds, (C) the Holders will
      not recognize income, gain or loss for federal income tax purposes as a
      result of such deposit and the defeasance of the obligations referred to
      in the first paragraph of this Section 8.03 and will be subject to federal
      income tax on the same amount and in the same manner and at the same times
      as would have been the case if such deposit and defeasance had not
      occurred and (D) after the passage of 123 days following the deposit
      (except, with respect to any trust funds for the account of any
<PAGE>

                                       62


      Holder who may be deemed to be an "insider" for purposes of the United
      States Bankruptcy Code, after one year following the deposit), the trust
      funds will not be subject to the effect of Section 547 of the United
      States Bankruptcy Code or Section 15 of the New York Debtor and Creditor
      Law in a case commenced by or against the Company under either such
      statute, and either (1) the trust funds will no longer remain the property
      of the Company (and therefore will not be subject to the effect of any
      applicable bankruptcy, insolvency, reorganization or similar laws
      affecting creditors' rights generally) or (2) if a court were to rule
      under any such law in any case or proceeding that the trust funds remained
      property of the Company (x) assuming such trust funds remained in the
      possession of the Trustee prior to such court ruling to the extent not
      paid to the Holders, the Trustee will hold, for the benefit of the
      Holders, a valid and perfected security interest in such trust funds that
      is not avoidable in bankruptcy or otherwise (except for the effect of
      Section 552(b) of the United States Bankruptcy Code on interest on the
      trust funds accruing after the commencement of a case under such statute),
      (y) the Holders will be entitled to receive adequate protection of their
      interests in such trust funds if such trust funds are used in such case or
      proceeding and (z) no property, rights in property or other interests
      granted to the Trustee or the Holders in exchange for, or with respect to,
      such trust funds will be subject to any prior rights of holders of other
      Indebtedness of the Company or any of its Subsidiaries;

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

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

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

            SECTION 8.05. Repayment to Company. Subject to Sections 7.07, 8.01,
8.02 and 8.03, the Trustee and the Paying Agent shall promptly pay to the
Company upon request set forth in an Officers' Certificate any excess money held
by them at any time and thereupon shall be relieved from all liability with
respect to such money. The Trustee and the Paying Agent shall pay to the Company
upon request any money held by them for the payment of
<PAGE>

                                       63


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

            SECTION 8.06. Reinstatement. If the Trustee or Paying Agent is
unable to apply any money or U.S. Government Obligations in accordance with
Section 8.01, 8.02 or 8.03, as the case may be, by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise prohibiting such application, the
Company's obligations under this Indenture and the Securities shall be revived
and reinstated as though no deposit had occurred pursuant to Section 8.01, 8.02
or 8.03, as the case may be, until such time as the Trustee or Paying Agent is
permitted to apply all such money or U.S. Government Obligations in accordance
with Section 8.01, 8.02 or 8.03, as the case may be; provided, however, that, if
the Company has made any payment of principal of, premium, if any, or interest
on any Securities because of the reinstatement of its obligations, the Company
shall be subrogated to the rights of the Holders of such Securities to receive
such payment from the money or U.S. Government Obligations held by the Trustee
or Paying Agent.

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

                                  ARTICLE NINE
                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

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

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

                                       64


            (b) to comply with Article Five;

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

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

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

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

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

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

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

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

            (iv) modify any of the provisions of this Section 9.02, except to
      increase any such percentage or to provide that certain other provisions
      of this Indenture cannot be
<PAGE>

                                       65


      modified or waived without the consent of the Holder of each outstanding
      Security affected thereby.

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

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

            SECTION 9.03. Revocation and Effect of Consent. Until an amendment
or waiver becomes effective, a consent to it by a Holder is a continuing consent
by the Holder and every subsequent Holder of a Security or portion of a Security
that evidences the same debt as the Security of the consenting Holder, even if
notation of the consent is not made on any Security. However, any such Holder or
subsequent Holder may revoke the consent as to its Security or portion of its
Security. Such revocation shall be effective only if the Trustee receives the
notice of revocation before the date the amendment, supplement or waiver becomes
effective. An amendment, supplement or waiver shall become effective on receipt
by the Trustee of written consents from the Holders of the requisite percentage
in principal amount of the outstanding Securities.

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

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

                                       66


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

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

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

                                   ARTICLE TEN
                                  MISCELLANEOUS

            SECTION 10.01. Trust Indenture Act of 1939. This Indenture shall be
subject to the provisions of the TIA that are required to be a part of this
Indenture and shall, to the extent applicable, be governed by such provisions.

            SECTION 10.02. Notices. Any notice or communication shall be
sufficiently given if in writing and delivered in person or mailed by first
class mail addressed as follows:

            if to the Company:

                  WinStar Communications, Inc.
                  230 Park Avenue
                  New York, New York  10169
                  Attention:  General Counsel
<PAGE>

                                       67


            if to the Trustee:

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

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

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

            Failure to mail a notice or communication to a Holder or any defect
in it shall not affect its sufficiency with respect to other Holders. Except for
a notice to the Trustee, which is deemed given only when received, and except as
otherwise provided in this Indenture, if a notice or communication is mailed in
the manner provided in this Section 10.02, it is duly given, whether or not the
addressee receives it.

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

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

            SECTION 10.03. Certificate and Opinion as to Conditions Precedent.
Upon any request or application by the Company to the Trustee to take any action
under this Indenture, the Company shall furnish to the Trustee:

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

                                       68


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

            SECTION 10.04. Statements Required in Certificate or Opinion. Each
certificate or opinion with respect to compliance with a condition or covenant
provided for in this Indenture shall include:

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

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

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

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

            SECTION 10.05. Rules by Trustee, Paying Agent or Registrar. The
Trustee may make reasonable rules for action by or at a meeting of Holders. The
Paying Agent or Registrar may make reasonable rules for its functions.

            SECTION 10.06. Payment Date Other Than a Business Day. If an
Interest Payment Date, Redemption Date, Change of Control Payment Date, Excess
Proceeds Payment Date, Stated Maturity or date of maturity of any Security shall
not be a Business Day, then payment of principal of, premium, if any, or
interest on such Security, as the case may be, need not be made on such date,
but may be made on the next succeeding Business Day with the same force and
effect as if made on the Interest Payment Date, Change of Control Payment Date,
Excess Proceeds Payment Date, or Redemption Date, or at the Stated Maturity or
date of maturity of such Security; provided, however, that no interest shall
accrue for the period from and after such Interest Payment Date, Change of
Control Payment Date, Excess Proceeds Payment Date, Redemption Date, Stated
Maturity or date of maturity, as the case may be.

            SECTION 10.07. Governing Law. This Indenture and the Securities
shall be governed by the laws of the State of New York, excluding (to the extent
permissible by law) any
<PAGE>

                                       69


rule of law that would cause the application of the laws of any jurisdiction
other than the State of New York.

            SECTION 10.08. No Adverse Interpretation of Other Agreements. This
Indenture may not be used to interpret another indenture, loan or debt agreement
of the Company or any Subsidiary of the Company. Any such indenture, loan or
debt agreement may not be used to interpret this Indenture.

            SECTION 10.09. No Recourse Against Others. No recourse for the
payment of the principal of, premium, if any, or interest on any of the
Securities, or for any claim based thereon or otherwise in respect thereof, and
no recourse under or upon any obligation, covenant or agreement of the Company
contained in this Indenture, or in any of the Securities, or because of the
creation of any Indebtedness represented thereby, shall be had against any
incorporator, stockholder, officer, director, employee or controlling person, as
such, of the Company or of any successor Person thereof in such capacity;
provided, however, that the foregoing shall not affect the Company's obligations
with respect to the Equipment Note Guarantee; it being expressly understood that
all such liability is hereby expressly waived and released as a condition of,
and as a consideration for, the execution of this Indenture and the issue of the
Securities.

            SECTION 10.10. Successors. All agreements of the Company in this
Indenture and the Securities shall bind its successors. All agreements of the
Trustee in this Indenture shall bind its successors.

            SECTION 10.11. Duplicate Originals. The parties may sign any number
of copies of this Indenture. Each signed copy shall be an original, but all of
them together represent the same agreement.

            SECTION 10.12. Separability. In case any provision in this Indenture
or in the Securities shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

            SECTION 10.13. Table of Contents, Headings, Etc. The Table of
Contents, Cross-Reference Table and headings of the Articles and Sections of
this Indenture have been inserted for convenience of reference only, are not to
be considered a part hereof and shall in no way modify or restrict any of the
terms and provisions hereof.
<PAGE>

                                       70


                                   SIGNATURES

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


                                        WINSTAR COMMUNICATIONS, INC.


                                        By:___________________________
                                           Name:
                                           Title:


                                        UNITED STATES TRUST COMPANY OF
                                           NEW YORK


                                        By:___________________________
                                           Name:
                                           Title:
<PAGE>

                                      EA-1


                                                                       EXHIBIT A


                       [FACE OF EXCHANGE NOTE OR PRIVATE EXCHANGE NOTE]

*/
**/
***/

                          WINSTAR COMMUNICATIONS, INC.

                 14 1/2% Senior Deferred Interest Note Due 2005

                                                                 CUSIP _________
No. R-                                                                $_________

            WINSTAR COMMUNICATIONS, INC., a Delaware corporation (the "Company",
which term includes any successor under the Indenture hereinafter referred to),
for value received, promises to pay to __________ , or its registered assigns,
the principal sum of ___________________ ($__________) on October 15, 2005.

            SemiAnnual Interest Accrual Date: April 15 and October 15,
commencing April 15, 1997.

            Interest Payment Dates: April 15 and October 15, commencing April
15, 2001.

            Regular Record Dates: April 1 and October 1.

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

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

**/ If the Security is a Private Exchange Security issued in a Private Exchange
to an Initial Purchaser holding an unsold portion of its initial allotment, add
the Restricted Securities Legend from Exhibit 1 to the Rule 144A/Regulation S
Appendix and replace the Assignment Form included in this Exhibit A with
Assignment Form included in such Exhibit 1.

***/ Add the Original Issue Discount Legend from Exhibit 1 to the Rule
144A/Regulation S Appendix.
<PAGE>

                                      EA-2


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

                                        WINSTAR COMMUNICATIONS, INC.


                                        By:___________________________
                                           Name:
                                           Title:


                (Form of Trustee's Certificate of Authentication)

      This is one of the 14 1/2% Senior Deferred Interest Notes Due 2005
described in the within-mentioned Indenture.


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


                                        By:___________________________
                                           Authorized Signatory
<PAGE>

                                      EA-3


            [REVERSE SIDE OF EXCHANGE NOTE OR PRIVATE EXCHANGE NOTE]

                          WINSTAR COMMUNICATIONS, INC.

                 14 1/2% Senior Deferred Interest Note Due 2005

1. Principal and Interest.

            The Company will pay the principal of this Note on October 15, 2005.

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

            Until October 15, 2000, interest on the Notes will accrue at a rate
of 14 1/2% per annum and be compounded semiannually on each SemiAnnual Interest
Accrual Date, but (except as provided below) will not be payable in cash. From
and after October 15, 2000, interest on the Accumulated Amount of each Note will
be payable semiannually (to the holders of record of the Notes at the close of
business on the April 1 or October 1 immediately preceding the relevant Interest
Payment Date) on each Interest Payment Date, commencing April 15, 2001.

            "Accumulated Amount" means, as of any date (the "Specified Date"),
the amount provided below for each $1,000 principal amount of Notes.

            (i) If the Specified Date occurs on one of the following dates
      (each, a "SemiAnnual Interest Accrual Date"), the Accumulated Amount of
      this Note will equal the amount set forth below for such Note for such
      SemiAnnual Interest Accrual Date:

            SemiAnnual Interest Accrual Date   Accumulated Amount
            --------------------------------   ------------------
            April 15,1997....................     $1,010.875
            October 15, 1997.................      1,084.163
            April 15, 1998...................      1,162.765
            October 15, 1998.................      1,247.066
            April 15, 1999...................      1,337.478
            October 15, 1999.................      1,434.445
            April 15, 2000...................      1,538.442
            October 15, 2000.................      1,649.980

            (ii) if the Specified Date occurs before the first SemiAnnual
      Interest Accrual Date, the Accumulated Amount will equal the sum of (A)
      $1,000 and (B) an amount equal to the product of (1) the Accumulated
      Amount for the first SemiAnnual Interest Accrual Date less $1,000
      multiplied by (2) a fraction, the numerator of which is the number of days
      elapsed from the Closing Date to the Specified Date, using a 360-day year
      of twelve 30-day months, and the denominator of which is the number of
      days from the Closing
<PAGE>

                                      EA-4


      Date to the first SemiAnnual Interest Accrual Date, using a 360-day year
      of twelve 30-day months;

            (iii) if the Specified Date occurs between two SemiAnnual Interest
      Accrual Dates, the Accumulated Amount will equal the sum of (A) the
      Accumulated Amount for the SemiAnnual Interest Accrual Date immediately
      preceding such Specified Date and (B) an amount equal to the product of
      (1) the Accumulated Amount for the immediately following SemiAnnual
      Interest Accrual Date less the Accumulated Amount for the immediately
      preceding SemiAnnual Interest Accrual Date multiplied by (2) a fraction,
      the numerator of which is the number of days elapsed from the immediately
      preceding SemiAnnual Interest Accrual Date to the Specified Date, using a
      360-day year or twelve 30-day months, and the denominator of which is 180;
      or

            (iv) if the Specified Date occurs after the last SemiAnnual Interest
      Accrual Date, the Accumulated Amount of this Note will equal $1,649.98.

            Notwithstanding anything to the contrary above, (i) if a
Registration Default (as defined in the Registration Rights Agreement) occurs,
additional interest will accrue on this Note from and including the date on
which any such Registration Default shall occur to but excluding the earlier of
(x) the date on which all Registration Defaults have been cured and (y) the date
on which all Notes become freely transferable by Holders other than Affiliates
of the Company without further registration under the Securities Act. Such
additional interest will be payable in cash semiannually in arrears, at a rate
per annum equal to .50% of the Accumulated Amount of the Notes on the relevant
Interest Payment Date. Such additional interest will be payable on each
SemiAnnual Interest Accrual Date or Interest Payment Date, as the case may be,
commencing with the first SemiAnnual Interest Accrual Date following the
applicable Registration Default. Payments of additional interest on the Notes
will be made to the Holders of Notes on the Regular Record Date (or, if there is
no Regular Record Date, the date 15 days prior to such SemiAnnual Interest
Accrual Date) immediately preceding such SemiAnnual Interest Accrual Date or
Interest Payment Date.

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

2. Method of Payment.

            The Company will pay principal as provided above and interest
(except defaulted interest) on the Accumulated Amount of the Notes as provided
above on each April 15 and October 15, commencing April 15, 2001, to the persons
who are Holders (as reflected in the Security Register) at the close of business
on the April 1 or October 1 immediately preceding the relevant Interest Payment
Date, in each case, even if the Note is cancelled on registration
<PAGE>

                                      EA-5


of transfer or registration of exchange after such record date; provided,
however, that, with respect to the payment of principal, the Company will not
make payment to the Holder unless this Note is surrendered to a Paying Agent.

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

3. Paying Agent and Registrar.

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

4. Indenture.

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

            The Notes are general unsecured senior indebtedness of the Company,
will rank pari passu in right of payment with all existing and future senior
indebtedness of the Company and will be senior in right of payment to all
existing and future subordinated indebtedness of the Company. The Indenture
limits the original aggregate principal amount of the Notes to $100,000,000
(subject to Section 2.07 of the Indenture).
<PAGE>

                                      EA-6


            5. Redemption.

            The Notes will not be redeemable prior to October 15, 2000.
Thereafter, the Notes will be redeemable, at the Company's option, in whole at
any time or in part from time to time upon not less than 30 nor more than 60
days' prior notice mailed by first-class mail to each Holders' last address as
it appears in the Security Register, at the following Redemption Prices
(expressed as a percentage of the Accumulated Amount of the Notes), plus accrued
and unpaid interest, if any, on such Accumulated Amount to the Redemption Date
(subject to the right of Holders of record on the relevant Regular Record Date
that is on or prior to the Redemption Date to receive interest due on the
relevant Interest Payment Date), if redeemed during the 12-month period
commencing October 15 of the years set forth below:

            Year                            Redemption Price
            ----                            ----------------
            2000                                107.250%
            2001                                104.833
            2002                                102.417
            2003 and thereafter                 100.000

6. Notice of Redemption.

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

7. Repurchase upon Change in Control.

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

            A notice of such Change of Control will be mailed within 30 days
after any Change of Control occurs to each Holder at his last address as it
appears in the Security Register. Notes in original denominations larger than
$1,000 may be sold to the Company in part; provided, however, that Notes will
only be issued in denominations of $1,000 principal amount at maturity or
integral multiples thereof. On and after the Change of Control Payment
<PAGE>

                                      EA-7


Date, interest ceases to accrue on Notes or portions of Notes surrendered for
purchase by the Company, unless the Company defaults in the payment of the
Change of Control Payment.

8. Denominations; Transfer; Exchange.

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

9. Persons Deemed Owners.

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

10. Unclaimed Money.

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

11. Discharge Prior to Redemption or Maturity.

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

12. Amendment; Supplement; Waiver.

            Subject to certain exceptions, the Indenture or the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Notes then outstanding, and any existing default or
compliance with any provision may be waived with the consent of the Holders of
at least a majority in principal amount of the Notes then outstanding. Without
notice to or the consent of any Holder, the parties thereto may amend or
supplement the Indenture or the Notes to, among other things, cure any
ambiguity, defect or
<PAGE>

                                      EA-8


inconsistency and make any change that, in the opinion of the Board of Directors
of the Company, does not materially and adversely affect the rights of any
Holder.

13. Restrictive Covenants.

            The Indenture imposes certain limitations on the ability of the
Company and its Restricted Subsidiaries, among other things, to incur additional
indebtedness; create liens; engage in sale-leaseback transactions; pay dividends
or make distributions in respect of their capital stock; make investments or
make certain other restricted payments; sell assets; issue or sell stock of
Restricted Subsidiaries; enter into transactions with stockholders or
affiliates; or, with respect to the Company, consolidate, merge or sell all or
substantially all of its assets. Within 90 days after the end of the last fiscal
quarter of each year, the Company must report to the Trustee on compliance with
such limitations.

14. Successor Persons.

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

15. Defaults and Remedies.

            The following events constitute "Events of Default" under the
Indenture: (a) default in the payment of principal of (or premium, if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise; (b) default in the payment of interest on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company defaults in the performance of or breaches any other covenant or
agreement of the Company in the Indenture or under the Notes and such default or
breach continues for a period of 30 consecutive days after written notice by the
Trustee or the Holders of 25% or more in aggregate principal amount of the
Notes; (d) there occurs with respect to any issue or issues of Indebtedness of
the Company or any Significant Subsidiary having an outstanding principal amount
of $25,000,000 or more in the aggregate for all such issues of all such Persons,
whether such Indebtedness now exists or shall hereafter be created, (i) an event
of default that has caused the holder thereof to declare such Indebtedness to be
due and payable prior to its Stated Maturity and such Indebtedness has not been
discharged in full or such acceleration has not been rescinded or annulled
within 30 days of such acceleration and/or (ii) the failure to make a principal
payment at the final (but not any interim) fixed maturity and such defaulted
payment shall not have been made, waived or extended within 30 days of such
payment default; (e) any final judgment or order (not covered by insurance) for
the payment of money in excess of $25,000,000 in the aggregate for all such
final judgments or orders against all such Persons (treating any deductibles,
self-insurance or retention as not so
<PAGE>

                                      EA-9


covered) shall be rendered against the Company or any Significant Subsidiary and
shall not be paid or discharged, and there shall be any period of 60 consecutive
days following entry of the final judgment or order that causes the aggregate
amount for all such final judgments or orders outstanding and not paid or
discharged against all such Persons to exceed $25,000,000 during which a stay of
enforcement of such final judgment or order, by reason of a pending appeal or
otherwise, shall not be in effect; (f) a court having jurisdiction in the
premises enters a decree or order for (i) relief in respect of the Company or
any Significant Subsidiary in an involuntary case under any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect, (ii)
appointment of a receiver, liquidator, assignee, custodian, trustee,
sequestrator or similar official of the Company or any Significant Subsidiary or
for all or substantially all of the property and assets of the Company or any
Significant Subsidiary or (iii) the winding up or liquidation of the affairs of
the Company or any Significant Subsidiary and, in each case, such decree or
order shall remain unstayed and in effect for a period of 60 consecutive days;
or (g) the Company or any Significant Subsidiary (i) commences a voluntary case
under any applicable bankruptcy, insolvency or other similar law now or
hereafter in effect, or consents to the entry of an order for relief in an
involuntary case under any such law, (ii) consents to the appointment of or
taking possession by a receiver, liquidator, assignee, custodian, trustee,
sequestrator or similar official of the Company or any Significant Subsidiary or
for all or substantially all of the property and assets of the Company or any
Significant Subsidiary or (iii) effects any general assignment for the benefit
of creditors.

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

16. Trustee Dealings with Company.

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

                                      EA-10


17. No Recourse Against Others.

            No incorporator, stockholder, officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such obligations or their creation. Each Holder by accepting a Note waives
and releases all such liability. Such waiver and release are part of the
consideration for the issuance of the Notes.

18. Authentication.

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

19. Holders' Compliance with Registration Rights Agreement.

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

20. Abbreviations.

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

                                      EA-11


21. Governing Law.

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

            The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture. Requests may be made to WinStar
Communications, Inc., 230 Park Avenue, Suite 3126, New York, NY 10169,
Attention: General Counsel.
<PAGE>

                                      EA-12


                                 ASSIGNMENT FORM

I or we assign and transfer this Note to:


Please insert social security or other identifying number of assignee

__________________________________________________________

__________________________________________________________

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

The agent may substitute another to act for him.

Dated ______________________                Signed _________________________


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

Signature Guarantee_____________________________________________(1)

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

                                      EA-13


                       OPTION OF HOLDER TO ELECT PURCHASE

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

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

Date:______________________

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

Signature Guarantee:____________________________________________(2)

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

                                       A-1


                                                 RULE 144A/REGULATION S APPENDIX

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

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

      1. Definitions

      1.1 Definitions

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

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

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

            "Exchange Securities" means the 14 1/2% Senior Deferred Interest
Notes Due 2005 to be issued pursuant to this Indenture in connection with a
Registered Exchange Offer pursuant to the Registration Rights Agreement.

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

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

            "Initial Securities" means the 14 1/2% Senior Deferred Interest
Notes Due 2005, issued under this Indenture on or about the date hereof.
<PAGE>

                                       A-2


            "Private Exchange" means the offer by the Company, pursuant to the
Registration Rights Agreement, to the Initial Purchasers to issue and deliver to
each Initial Purchaser, in exchange for the Initial Securities held by the
Initial Purchaser as part of its initial distribution, a like aggregate
principal amount of Private Exchange Securities.

            "Private Exchange Securities" means the 14 1/2% Senior Deferred
Interest Notes Due 2005 to be issued pursuant to this Indenture to the Initial
Purchasers in a Private Exchange.

            "Purchase Agreement" means the Purchase Agreement dated March 13,
1997, among the Company and the Initial Purchasers.

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

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

            "Registration Rights Agreement" means the Registration Rights
Agreement dated March 18, 1997, among the Company, WinStar Equipment and the
Initial Purchasers.

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

            "Securities Act" means the Securities Act of 1933.

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

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

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

                                       A-3


      1.2 Other Definitions

                                                                      Defined in
           Term                                                        Section:
           ----                                                        --------

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

      2. The Securities.

      2.1 Form and Dating.

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

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

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

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

                                       A-4


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

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

      2.2 Authentication. The Trustee shall authenticate and deliver: (1)
Initial Securities for original issue in an aggregate principal amount of
$100,000,000 and (2) Exchange Securities or Private Exchange Securities for
issue only in a Registered Exchange Offer or a Private Exchange, respectively,
pursuant to the Registration Rights Agreement, for a like principal amount of
Initial Securities, in each case upon a written order of the Company signed by
two Officers or by an Officer and either an Assistant Treasurer or an Assistant
Secretary of the Company. Such order shall specify the amount of the Securities
to be authenticated and the date on which the original issue of Securities is to
be authenticated and whether the Securities are to be Initial Securities,
Exchange Securities or Private Exchange Securities. The aggregate principal
amount of Securities outstanding at any time may not exceed $100,000,000 except
as provided in Section 2.07 of this Indenture.

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

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

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

                                       A-5


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

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

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

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

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

                  (C) if such Definitive Securities are being transferred (w)
            pursuant to an exemption from registration in accordance with Rule
            144; or (x) in reliance on another exemption from the registration
            requirements of the Securities Act: (i) a certification to that
            effect (in the form set forth on the reverse of the Security) and
            (ii) if the Company or Registrar so requests, an opinion of counsel
            or other evidence reasonably satisfactory to them as to the
            compliance with the restrictions set forth in the legend set forth
            in Section 2.3(d)(i).

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

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

                                       A-6


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

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

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

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

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

                                       A-7


      with the provisions of this Section 2.3 (including the certification
      requirements set forth on the reverse of the Initial Securities intended
      to ensure that such transfers comply with Rule 144A or Regulation S, as
      the case may be) and such other procedures as may from time to time be
      adopted by the Company.

            (d) Legends.

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

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

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

                                       A-8


               Each Definitive Security will also bear the following additional
legend:

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

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

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

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

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

            (iv) Upon the consummation of a Registered Exchange Offer with
      respect to the Initial Securities pursuant to which Holders of such
      Initial Securities are offered
<PAGE>

                                       A-9


      Exchange Securities in exchange for their Initial Securities, all
      requirements pertaining to such Initial Securities that Initial Securities
      issued to certain Holders be issued in global form will cease to apply and
      certificated Initial Securities with the Restricted Securities Legend set
      forth in Exhibit 1 hereto will be available to Holders of such Initial
      Securities that do not exchange their Initial Securities, and Exchange
      Securities in certificated or global form will be available to Holders
      that exchange such Initial Securities in such Registered Exchange Offer.

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

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

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

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

            (ii) No service charge shall be made for any registration of
      transfer or exchange, but the Company may require payment of a sum
      sufficient to cover any transfer tax, assessments or similar governmental
      charge payable in connection therewith (other than any such transfer
      taxes, assessments or similar governmental charge payable upon exchange or
      transfer pursuant to Sections 3.07, 4.11, 4.12 and 9.04 of the Indenture).
<PAGE>

                                      A-10


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

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

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

            (g) No Obligation of the Trustee.

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

            (ii) The Trustee shall have no obligation or duty to monitor,
      determine or inquire as to compliance with any restrictions on transfer
      imposed under this Inden-
<PAGE>

                                      A-11


      ture or under applicable law with respect to any transfer of any interest
      in any Security (including any transfers between or among Depositary
      participants, members or beneficial owners in any Global Security) other
      than to require delivery of such certificates and other documentation or
      evidence as are expressly required by, and to do so if and when expressly
      required by, the terms of this Indenture, and to examine the same to
      determine substantial compliance as to form with the express requirements
      hereof.

      2.4 Certificated Securities.

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

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

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

                                      A-12


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

                                      EI-1


                                                                       EXHIBIT 1
                                                                              to
                                                 Rule 144A/REGULATION S APPENDIX

                             [FACE OF INITIAL NOTE]

                           [Global Securities Legend]

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

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

                         [Restricted Securities Legend]

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

                                      EI-2


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

            IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE
REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH
TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH
THE FOREGOING RESTRICTIONS.(1)

                        [Original Issue Discount Legend]

            FOR PURPOSES OF SECTION 1273 OF THE INTERNAL REVENUE CODE OF 1986,
AS AMENDED (THE "CODE"), THIS SECURITY HAS ORIGINAL ISSUE DISCOUNT. FOR PURPOSES
OF SECTION 1273 OF THE CODE, THE ISSUE PRICE IS $1,000.00 AND THE AMOUNT OF
ORIGINAL ISSUE DISCOUNT IS $1,846.22, IN EACH CASE PER $1,000 PRINCIPAL AMOUNT
OF THIS SECURITY. THE AMOUNT OF ORIGINAL ISSUE DISCOUNT ATTRIBUTABLE TO THE
PERIOD COMMENCING MARCH 18, 1997 AND ENDING ON APRIL 15, 1997 IS $10.88. FOR
PURPOSES OF SECTION 1275 OF THE CODE, THE ISSUE DATE OF THIS SECURITY IS MARCH
18, 1997. FOR PURPOSES OF SECTION 1272 OF THE CODE, THE YIELD TO MATURITY
(COMPOUNDED SEMIANNUALLY ON APRIL 15 AND OCTOBER 15) IS 14 1/2%, CALCULATED
BASED ON THE APPROXIMATE METHOD.

- ----------
(1)   Include if a Definitive Security is to be held by an institutional
      "accredited investor" (as defined in Rule 501(a), (1), (2), (3) or (7))
      under the Securities Act.
<PAGE>

                                      EI-3


                          WINSTAR COMMUNICATIONS, INC.

                 14 1/2% Senior Deferred Interest Note Due 2005

                                                               CUSIP 975515 AG 2
No. Q1B                                                             $___________

            WINSTAR COMMUNICATIONS, INC., a Delaware corporation (the "Company",
which term includes any successor under the Indenture hereinafter referred to),
for value received, promises to pay to __________ , or its registered assigns,
the principal sum of ____________ ($_____) on October 15, 2005.

            SemiAnnual Interest Accrual Date: April 15 and October 15,
commencing April 15, 1997.

            Interest Payment Dates: April 15 and October 15, commencing April
15, 2001.

            Regular Record Dates: April 1 and October 1.

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

                                      EI-4


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

                                        WINSTAR COMMUNICATIONS, INC.


                                        By:_________________________________
                                           Name:
                                           Title:

                (Form of Trustee's Certificate of Authentication)

      This is one of the __% Senior Deferred Interest Notes Due 2005 described
in the within-mentioned Indenture.

Date:

                                        UNITED STATES TRUST
                                        COMPANY OF NEW YORK, as
                                        Trustee


                                        By:_________________________________
                                                   Authorized Signatory
<PAGE>

                                      EI-5


                             [REVERSE SIDE OF NOTE]

                          WINSTAR COMMUNICATIONS, INC.

                 14 1/2% Senior Deferred Interest Note Due 2005

1. Principal and Interest.

            The Company will pay the principal of this Note on October 15, 2005.

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

            Until October 15, 2000, interest on the Notes will accrue at a rate
of 14 1/2% per annum and be compounded semiannually on each SemiAnnual Interest
Accrual Date, but (except as provided below) will not be payable in cash. From
and after October 15, 2000, interest on the Accumulated Amount of each Note will
be payable semiannually (to the holders of record of the Notes at the close of
business on the April 1 or October 1 immediately preceding the relevant Interest
Payment Date) on each Interest Payment Date, commencing April 15, 2001.

            "Accumulated Amount" means, as of any date (the "Specified Date"),
the amount provided below for each $1,000 principal amount of Notes.

            (i) If the Specified Date occurs on one of the following dates
      (each, a "SemiAnnual Interest Accrual Date"), the Accumulated Amount of
      this Note will equal the amount set forth below for such Note for such
      SemiAnnual Interest Accrual Date:

                  SemiAnnual Interest Accrual Date      Accumulated Amount
                  --------------------------------      ------------------
                  April 15,1997....................         $1,010.875
                  October 15, 1997.................          1,084.163
                  April 15, 1998...................          1,162.765
                  October 15, 1998.................          1,247.066
                  April 15, 1999...................          1,337.478
                  October 15, 1999.................          1,434.445
                  April 15, 2000...................          1,538.442
                  October 15, 2000.................          1,649.980

            (ii) if the Specified Date occurs before the first SemiAnnual
      Interest Accrual Date, the Accumulated Amount will equal the sum of (A)
      $1,000 and (B) an amount equal to the product of (1) the Accumulated
      Amount for the first
<PAGE>

                                      EI-6


      SemiAnnual Interest Accrual Date less $1,000 multiplied by (2) a fraction,
      the numerator of which is the number of days elapsed from the Closing Date
      to the Specified Date, using a 360-day year of twelve 30-day months, and
      the denominator of which is the number of days from the Closing Date to
      the first SemiAnnual Interest Accrual Date, using a 360-day year of twelve
      30-day months;

            (iii) if the Specified Date occurs between two SemiAnnual Interest
      Accrual Dates, the Accumulated Amount will equal the sum of (A) the
      Accumulated Amount for the SemiAnnual Interest Accrual Date immediately
      preceding such Specified Date and (B) an amount equal to the product of
      (1) the Accumulated Amount for the immediately following SemiAnnual
      Interest Accrual Date less the Accumulated Amount for the immediately
      preceding SemiAnnual Interest Accrual Date multiplied by (2) a fraction,
      the numerator of which is the number of days elapsed from the immediately
      preceding SemiAnnual Interest Accrual Date to the Specified Date, using a
      360-day year or twelve 30-day months, and the denominator of which is 180;
      or

            (iv) if the Specified Date occurs after the last SemiAnnual Interest
      Accrual Date, the Accumulated Amount of this Note will equal $1,649.98.

            Notwithstanding anything to the contrary above, (i) if a
Registration Default (as defined in the Registration Rights Agreement) occurs,
additional interest will accrue on this Note from and including the date on
which any such Registration Default shall occur to but excluding the earlier of
(x) the date on which all Registration Defaults have been cured and (y) the date
on which all Notes become freely transferable by Holders other than Affiliates
of the Company without further registration under the Securities Act. Such
additional interest will be payable in cash semiannually in arrears, at a rate
per annum equal to .50% of the Accumulated Amount of the Notes on the relevant
Interest Payment Date. Such additional interest will be payable on each
SemiAnnual Interest Accrual Date or Interest Payment Date, as the case may be,
commencing with the first SemiAnnual Interest Accrual Date following the
applicable Registration Default. Payments of additional interest on the Notes
will be made to the Holders of Notes on the Regular Record Date (or, if there is
no Regular Record Date, the date 15 days prior to such SemiAnnual Interest
Accrual Date) immediately preceding such SemiAnnual Interest Accrual Date or
Interest Payment Date.

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

                                      EI-7


2. Method of Payment.

            The Company will pay principal as provided above and interest
(except defaulted interest) on the Accumulated Amount of the Notes as provided
above on each April 15 and October 15, commencing April 15, 2001, to the persons
who are Holders (as reflected in the Security Register) at the close of business
on the April 1 or October 1 immediately preceding the relevant Interest Payment
Date, in each case, even if the Note is cancelled on registration of transfer or
registration of exchange after such record date; provided, however, that, with
respect to the payment of principal, the Company will not make payment to the
Holder unless this Note is surrendered to a Paying Agent.

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

3. Paying Agent and Registrar.

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

4. Indenture.

            The Company issued the Notes under an Indenture dated as of March 1,
1997 (the "Indenture"), between the Company and the Trustee. Capitalized terms
herein are used as defined in the Indenture unless otherwise indicated. The
terms of the Notes include those stated in the Indenture and those made part of
the Indenture by reference to the Trust Indenture Act. The Notes are subject to
all such terms, and Holders are referred to the Indenture and the Trust
Indenture Act for a statement of all such terms. To the extent permitted by
applicable law, in the event of any inconsistency between the
<PAGE>

                                      EI-8


terms of this Note and the terms of the Indenture, the terms of the Indenture
shall control.

            The Notes are general unsecured senior indebtedness of the Company,
will rank pari passu in right of payment with all existing and future senior
indebtedness of the Company and will be senior in right of payment to all
existing and future subordinated indebtedness of the Company. The Indenture
limits the original aggregate principal amount of the Notes to $100,000,000
(subject to Section 2.07 of the Indenture).

5. Redemption.

            The Notes will not be redeemable prior to October 15, 2000.
Thereafter, the Notes will be redeemable, at the Company's option, in whole at
any time or in part from time to time upon not less than 30 nor more than 60
days' prior notice mailed by first-class mail to each Holders' last address as
it appears in the Security Register, at the following Redemption Prices
(expressed as a percentage of the Accumulated Amount of the Notes), plus accrued
and unpaid interest, if any, on such Accumulated Amount to the Redemption Date
(subject to the right of Holders of record on the relevant Regular Record Date
that is on or prior to the Redemption Date to receive interest due on the
relevant Interest Payment Date), if redeemed during the 12-month period
commencing October 15 of the years set forth below:

                      Year                     Redemption Price
                      ----                     ----------------
                      2000                         107.250%
                      2001                         104.833
                      2002                         102.417
                      2003 and thereafter          100.000

6. Notice of Redemption.

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

7. Repurchase upon Change in Control.
<PAGE>

                                      EI-9


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

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

8. Denominations; Transfer; Exchange.

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

9. Persons Deemed Owners.

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

10. Unclaimed Money.

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

                                      EI-10


11. Discharge Prior to Redemption or Maturity.

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

12. Amendment; Supplement; Waiver.

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

13. Restrictive Covenants.

            The Indenture imposes certain limitations on the ability of the
Company and its Restricted Subsidiaries, among other things, to incur additional
indebtedness; create liens; engage in sale-leaseback transactions; pay dividends
or make distributions in respect of their capital stock; make investments or
make certain other restricted payments; sell assets; issue or sell stock of
Restricted Subsidiaries; enter into transactions with stockholders or
affiliates; or, with respect to the Company, consolidate, merge or sell all or
substantially all of its assets. Within 90 days after the end of the last fiscal
quarter of each year, the Company must report to the Trustee on compliance with
such limitations.

14. Successor Persons.

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

                                      EI-11


15. Defaults and Remedies.

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

                                      EI-12


similar official of the Company or any Significant Subsidiary or for all or
substantially all of the property and assets of the Company or any Significant
Subsidiary or (iii) effects any general assignment for the benefit of creditors.

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

16. Trustee Dealings with Company.

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

17. No Recourse Against Others.

            No incorporator, stockholder, officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such obligations or their creation. Each Holder by accepting a Note waives
and releases all such liability. Such waiver and release are part of the
consideration for the issuance of the Notes.

18. Authentication.

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

19. Holders' Compliance with Registration Rights Agreement.
<PAGE>

                                      EI-13


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

20. Abbreviations.

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

21. Governing Law.

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

            The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture. Requests may be made to WinStar
Communications, Inc., 230 Park Avenue, Suite 3126, New York, NY 10169,
Attention: General Counsel.
<PAGE>

                                      EI-14


                                 ASSIGNMENT FORM

I or we assign and transfer this Note to:


Please insert social security or other identifying number of assignee


________________________________________________________

________________________________________________________

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

The agent may substitute another to act for him.

Dated_____________________          Signed_______________

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


Signature Guarantee_____________________________________________(1)

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

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

                                      EI-15


of the Company, the undersigned confirms that such Securities are being
transferred in accordance with its terms:

CHECK ONE BOX BELOW

        (1)    |_|    to the Company; or

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

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

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

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

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

                                      EI-16


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


                                            ________________________
                                               Signature

Signature Guarantee:

____________________________        ________________________________
Signature must be guaranteed                Signature

____________________________________________________________

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

            The undersigned represents and warrants that it is purchasing this
Security for its own account or an account with respect to which it exercises
sole investment discretion and that it and any such account is a "qualified
institutional buyer" within the meaning of Rule 144A under the Securities Act of
1933, and is aware that the sale to it is being made in reliance on Rule 144A
and acknowledges that it has received such information regarding the Company as
the undersigned has requested pursuant to Rule 144A or has determined not to
request such information and that it is aware that the transferor is relying
upon the undersigned's foregoing representations in order to claim the exemption
from registration provided by Rule 144A.


Dated: ________________      ______________________________
                                NOTICE: To be executed by
                                        an executive officer
<PAGE>

                                      EI-17


                      [TO BE ATTACHED TO GLOBAL SECURITIES]

              SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

            The following increases or decreases in this Global Security have
      been made:

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

                                      EI-18


                       OPTION OF HOLDER TO ELECT PURCHASE

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

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

Date:_______________________

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

Signature Guarantee:____________________________________________(2)

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



                                                                  EXECUTION COPY

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


                            WINSTAR EQUIPMENT CORP.,
                                    as Issuer


                          WINSTAR COMMUNICATIONS, INC.,
                                  as Guarantor

                                       and


                    UNITED STATES TRUST COMPANY OF NEW YORK,
                                   as Trustee


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

                    Guaranteed Senior Secured Notes Indenture

                            Dated as of March 1, 1997

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


                12 1/2% Guaranteed Senior Secured Notes Due 2004


================================================================================
<PAGE>

                              CROSS-REFERENCE TABLE

TIA Sections                                                  Indenture Sections
- ------------                                                  ------------------

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

- ----------

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

                               TABLE OF CONTENTS


RECITALS OF THE COMPANY......................................................1

                                  ARTICLE ONE
                  DEFINITIONS AND INCORPORATION BY REFERENCE

SECTION 1.01    Definitions..................................................1
SECTION 1.02.   Incorporation by Reference of Trust Indenture Act...........20
SECTION 1.03.   Rules of Construction.......................................21
SECTION 1.04.   Designation of the Securities...............................21

                                  ARTICLE TWO
                                THE SECURITIES

SECTION 2.01.   Form and Dating.............................................21
SECTION 2.02.   Execution and Authentication................................22
SECTION 2.03.   Registrar and Paying Agent..................................22
SECTION 2.04.   Paying Agent to Hold Money in Trust.........................23
SECTION 2.05.   Securityholder Lists........................................23
SECTION 2.06.   Transfer and Exchange.......................................23
SECTION 2.07.   Replacement Securities......................................24
SECTION 2.08.   Outstanding Securities......................................24
SECTION 2.09.   Temporary Securities........................................25
SECTION 2.10.   Cancellation................................................25
SECTION 2.11.   Defaulted Interest..........................................25
SECTION 2.12.   CUSIP Numbers ..............................................26

                                 ARTICLE THREE
                                  REDEMPTION

SECTION 3.01.   Right of Optional Redemption................................26
SECTION 3.02    Mandatory Redemption........................................26
SECTION 3.03.   Notices to Trustee..........................................26
SECTION 3.04.   Selection of Securities to Be Redeemed......................27
SECTION 3.05.   Notice of Redemption........................................27
SECTION 3.06.   Effect of Notice of Redemption..............................28
SECTION 3.07.   Deposit of Redemption Price.................................29
SECTION 3.08.   Payment of Securities Called for Redemption.................29
SECTION 3.09.   Securities Redeemed in Part.................................29

- ----------

Note: The Table of Contents shall not for any purposes be deemed to be a part of
      the Indenture.
<PAGE>

                                      ii

                                 ARTICLE FOUR
                                   COVENANTS

SECTION 4.01.   Payment of Securities.......................................30
SECTION 4.02.   Maintenance of Office or Agency.............................31
SECTION 4.03.   Limitation on Indebtedness..................................31
SECTION 4.04.   Limitation on Restricted Payments...........................33
SECTION 4.05.   Limitation on Dividend and Other Payment Restrictions 
                  Affecting Restricted Subsidiaries.........................36
SECTION 4.06.   Limitation on the Issuance of Capital Stock of 
                  Restricted Subsidiaries ..................................37
SECTION 4.07.   Limitation on Issuances of Guarantees by Restricted 
                  Subsidiaries .............................................37
SECTION 4.08.   Limitation on Transactions with Shareholders and Affiliates.38
SECTION 4.09.   Limitation on Liens.........................................39
SECTION 4.10.   Limitation on Sale-Leaseback Transactions...................40
SECTION 4.11.   Limitation on Asset Sales...................................40
SECTION 4.12.   Repurchase of Securities upon a Change of Control...........42
SECTION 4.13.   Existence...................................................42
SECTION 4.14.   Payment of Taxes and Other Claims...........................43
SECTION 4.15.   Maintenance of Properties and Insurance.....................43
SECTION 4.16.   Notice of Defaults..........................................43
SECTION 4.17.   Compliance Certificates.....................................43
SECTION 4.18.   SEC Reports and Reports to Holders..........................44
SECTION 4.19.   Waiver of Stay, Extension or Usury Laws.....................44
SECTION 4.20.   Limitation on the Company's Business Activities ............45
SECTION 4.21.   Use of Proceeds ............................................45
SECTION 4.22.   Purchase Money Security Interests ..........................45
SECTION 4.23.   Impairment of Security Interest ............................46
SECTION 4.24.   Ownership of the Company ...................................46

                                 ARTICLE FIVE
                             SUCCESSOR CORPORATION

SECTION 5.01.   When WCI or the Company May Merge, Etc......................46
SECTION 5.02.   Successor Substituted.......................................47
<PAGE>

                                     iii


                                  ARTICLE SIX
                             DEFAULT AND REMEDIES

SECTION 6.01.   Events of Default...........................................48
SECTION 6.02.   Acceleration................................................49
SECTION 6.03.   Other Remedies..............................................50
SECTION 6.04.   Waiver of Past Defaults.....................................50
SECTION 6.05.   Control by Majority.........................................51
SECTION 6.06.   Limitation on Suits.........................................51
SECTION 6.07.   Rights of Holders to Receive Payment........................52
SECTION 6.08.   Collection Suit by Trustee..................................52
SECTION 6.09.   Trustee May File Proofs of Claim............................52
SECTION 6.10.   Priorities..................................................53
SECTION 6.11.   Undertaking for Costs.......................................53
SECTION 6.12.   Restoration of Rights and Remedies..........................53
SECTION 6.13.   Rights and Remedies Cumulative..............................53
SECTION 6.14.   Delay or Omission Not Waiver................................54

                                 ARTICLE SEVEN
                                    TRUSTEE

SECTION 7.01.   General.....................................................54
SECTION 7.02.   Certain Rights of Trustee...................................54
SECTION 7.03.   Individual Rights of Trustee................................55
SECTION 7.04.   Trustee's Disclaimer........................................56
SECTION 7.05.   Notice of Default...........................................56
SECTION 7.06.   Reports by Trustee to Holders...............................56
SECTION 7.07.   Compensation and Indemnity..................................56
SECTION 7.08.   Replacement of Trustee......................................57
SECTION 7.09.   Successor Trustee by Merger, Etc............................58
SECTION 7.10.   Eligibility.................................................58
SECTION 7.11.   Money Held in Trust.........................................58
SECTION 7.12.   Withholding Taxes...........................................58

                                 ARTICLE EIGHT
                            DISCHARGE OF INDENTURE

SECTION 8.01.   Termination of Company's Obligations........................59
SECTION 8.02.   Defeasance and Discharge of Indenture.......................60
SECTION 8.03.   Defeasance of Certain Obligations...........................62
SECTION 8.04.   Application of Trust Money..................................64
<PAGE>

                                      iv


SECTION 8.05.   Repayment to Company........................................64
SECTION 8.06.   Reinstatement...............................................64
SECTION 8.07.   Insiders....................................................65

                                 ARTICLE NINE
                      AMENDMENTS, SUPPLEMENTS AND WAIVERS

SECTION 9.01.   Without Consent of Holders..................................65
SECTION 9.02.   With Consent of Holders.....................................65
SECTION 9.03.   Revocation and Effect of Consent............................67
SECTION 9.04.   Notation on or Exchange of Securities.......................67
SECTION 9.05.   Trustee to Sign Amendments, Etc.............................67
SECTION 9.06.   Conformity with Trust Indenture Act.........................68

                                  ARTICLE TEN
                           EQUIPMENT NOTE GUARANTEE

SECTION 10.01.  Guarantee...................................................68
SECTION 10.02.  Successors and Assigns......................................70
SECTION 10.03.  No Waiver.................................................. 70
SECTION 10.04.  Modification................................................70

                                ARTICLE ELEVEN
                              SECURITY DOCUMENTS

SECTION 11.01.  Collateral and Security Documents...........................70
SECTION 11.02.  Release of Collateral.......................................71
SECTION 11.03.  Certificates and Opinions...................................71


                                ARTICLE TWELVE
                                 MISCELLANEOUS

SECTION 12.01.  Trust Indenture Act of 1939.................................72
SECTION 12.02.  Notices.....................................................72
SECTION 12.03.  Certificate and Opinion as to Conditions Precedent..........73
SECTION 12.04.  Statements Required in Certificate or Opinion...............74
SECTION 12.05.  Rules by Trustee, Paying Agent or Registrar.................74
SECTION 12.06.  Payment Date Other Than a Business Day......................74
SECTION 12.07.  Governing Law...............................................74
SECTION 12.08.  No Adverse Interpretation of Other Agreements...............75
<PAGE>

                                      v


SECTION 12.09.  No Recourse Against Others..................................75
SECTION 12.10.  Successors..................................................75
SECTION 12.11.  Duplicate Originals.........................................75
SECTION 12.12.  Separability................................................75
SECTION 12.13.  Table of Contents, Headings, Etc............................75


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

Rule 144A/Regulation S Appendix ......................................... AP-1
<PAGE>

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

                             RECITALS OF THE COMPANY

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

                                  ARTICLE ONE
                  DEFINITIONS AND INCORPORATION BY REFERENCE

            SECTION 1.01. Definitions.

            "Adjusted Consolidated Net Income" means, for any period, the
aggregate net income (or loss) of WCI and its Restricted Subsidiaries for such
period determined in conformity with GAAP; provided, however, that the following
items shall be excluded in computing Adjusted Consolidated Net Income (without
duplication): (i) the net income of any Person (other than net income
attributable to a Restricted Subsidiary) in which any Person (other than WCI or
any of its Restricted Subsidiaries) has a joint interest and the net income of
any Unrestricted Subsidiary, except to the extent of the amount of dividends or
other distributions actually paid to WCI or any of its Restricted Subsidiaries
by such other Person, including, without limitation, an Unrestricted Subsidiary
during such period; (ii) solely for the purposes of calculating the amount of
Restricted Payments that may be made pursuant to clause (C) of the first
paragraph of Section 4.04 (and, in such case, except to the extent includable
pursuant to clause (i) above), the net income (or loss) of any Person accrued
prior to the date it becomes a Restricted Subsidiary or is merged into or
consolidated with WCI or any of its Restricted Subsidiaries or all or
substantially all of the property and assets of such Person are acquired by WCI
or any of its Restricted Subsidiaries; (iii) the net income of any Restricted
Subsidiary to the extent that the declaration or payment of dividends or similar
distributions by such Restricted Subsidiary of such net income is not at the
time permitted by the operation of the terms of its charter or any agreement,
instrument, judgment, decree, order, statute, rule or governmental regulation
<PAGE>
                                       2


applicable to such Restricted Subsidiary; (iv) any gains or losses (on an
after-tax basis) attributable to Asset Sales; (v) except for purposes of
calculating the amount of Restricted Payments that may be made pursuant to
clause (C) of the first paragraph of Section 4.04, any amount paid as, or
accrued for, cash dividends on Preferred Stock of WCI or any Restricted
Subsidiary owned by Persons other than WCI and any of its Restricted
Subsidiaries; and (vi) all extraordinary gains and extraordinary losses.

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

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

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

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

            "Asset Sale" means any sale, transfer or other disposition
(including by way of merger, consolidation or sale-leaseback transactions) in
one transaction or a series of related
<PAGE>
                                       3


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

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

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

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

            "Business Day" means any day except a Saturday, Sunday or other day
on which commercial banks in The City of New York, or in the city of the
Corporate Trust Office of the Trustee, are authorized by law to close.
<PAGE>
                                       4


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

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

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

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

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

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

            "Common Stock" means. with respect to any Person, any and all
shares, interests, participations or other equivalents (however designated,
whether voting or non-voting) of such Person's common stock, whether now
outstanding or issued after the date of this Indenture, including, without
limitation, all series and classes of such common stock.
<PAGE>
                                       5


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

            "Company Order" means a written request or order signed in the name
of WCI or the Company, as the case may be, (i) by its Chairman, a Vice Chairman,
its President or a Vice President and (ii) by its Treasurer, an Assistant
Treasurer, its Secretary or an Assistant Secretary and delivered to the Trustee;
provided, however, that such written request or order may be signed by any two
of the officers or directors listed in clause (i) above in lieu of being signed
by one of such officers or directors listed in such clause (i) and one of the
officers listed in clause (ii) above.

            "Consolidated EBITDA" means, for any period, the sum of the amounts
for such period of (i) Adjusted Consolidated Net Income, (ii) Consolidated
Interest Expense, to the extent such amount was deducted in calculating Adjusted
Consolidated Net Income, (iii) income taxes, to the extent such amount was
deducted in calculating Adjusted Consolidated Net Income (other than income
taxes (either positive or negative) attributable to extraordinary and
nonrecurring gains or losses or sales of assets), (iv) depreciation expense, to
the extent such amount was deducted in calculating Adjusted Consolidated Net
Income, (v) amortization expense, to the extent such amount was deducted in
calculating Adjusted Consolidated Net Income, and (vi) all other noncash items
reducing Adjusted Consolidated Net Income (other than items that will require
cash payments and for which an accrual or reserve is, or is required by GAAP to
be, made), less all noncash items increasing Adjusted Consolidated Net Income,
all as determined on a consolidated basis for WCI and its Restricted
Subsidiaries in conformity with GAAP; provided, however, that, if any Restricted
Subsidiary is not a Wholly Owned Restricted Subsidiary, Consolidated EBITDA
shall be reduced (to the extent not otherwise reduced in accordance with GAAP)
by an amount equal to (A) the amount of the Adjusted Consolidated Net Income
attributable to such Restricted Subsidiary multiplied by (B) the quotient of (1)
the number of shares of outstanding Common Stock of such Restricted Subsidiary
not owned on the last day of such period by WCI or any of its Restricted
Subsidiaries divided by (2) the total number of shares of outstanding Common
Stock of such Restricted Subsidiary on the last day of such period.

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

            "Consolidated Interest Expense" means, for any period, the aggregate
amount of interest in respect of Indebtedness (including amortization of
original issue discount on any Indebtedness and the interest portion of any
deferred payment obligation, calculated in accordance with the effective
interest method of accounting; all commissions, discounts and other fees and
charges owed with respect to letters of credit and bankers' acceptance
financing;
<PAGE>

                                      6


the net costs associated with Interest Rate Agreements; and Indebtedness that is
Guaranteed or secured by WCI or any of its Restricted Subsidiaries) and all but
the principal component of rentals in respect of Capitalized Lease Obligations
paid, accrued or scheduled to be paid or to be accrued by WCI and its Restricted
Subsidiaries during such period; excluding, however, (i) any amount of such
interest of any Restricted Subsidiary if the net income of such Restricted
Subsidiary is excluded in the calculation of Adjusted Consolidated Net Income
pursuant to clause (iii) of the definition thereof (but only in the same
proportion as the net income of such Restricted Subsidiary is excluded from the
calculation of Adjusted Consolidated Net Income pursuant to clause (iii) of the
definition thereof) and (ii) any premiums, fees and expenses (and any
amortization thereof) payable in connection with the offering of the Securities
and the Senior Notes, all as determined on a consolidated basis (without taking
into account Unrestricted Subsidiaries) in conformity with GAAP.

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

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

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

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

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

                                      7


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

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

            "Designated Equipment" means (i) telecommunications switches and
related equipment and inventory; (ii) customer premise equipment; (iii) radios,
antennae and cabling; (iv) office and warehouse furniture, fixtures and
equipment (including without limitation, computers and communications
equipment); (v) company service vehicles; and (vi) software related to each of
the foregoing, in each case used in the telecommunications business of WCI and
its Subsidiaries.

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

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

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

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

            "fair market value" means the price that would be paid in an
arm's-length transaction between an informed and willing seller under no
compulsion to sell and an informed and willing buyer under no compulsion to buy,
as determined in good faith by the Board of Directors (whose determination shall
be conclusive) and evidenced by a Board Resolution.

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

            "GAAP" means generally accepted accounting principles in the United
States of America as in effect as of the date of this Indenture, including,
without limitation, those set forth in the opinions and pronouncements of the
Accounting Principles Board of the American Institute of Certified Public
Accountants and statements and pronouncements of the Financial Accounting
Standards Board or in such other statements by such other entity as approved by
a significant segment of the accounting profession. All ratios and computations
contained in this Indenture shall be computed in conformity with GAAP applied on
a consistent basis, except that calculations made for purposes of determining
compliance with the terms of the covenants set forth in Article Four and Article
Five and with other provisions of this Indenture shall be made without giving
effect to (i) the amortization of any expenses incurred in connection with the
<PAGE>
                                       8


offering of the Securities or the Senior Notes and (ii) except as otherwise
provided, the amortization of any amounts required or permitted by Accounting
Principles Board Opinion Nos. 16 and 17.

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

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

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

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

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

            "Incur" means, with respect to any Indebtedness, to incur, create,
issue, assume, Guarantee or otherwise become liable for or with respect to, or
become responsible for, the payment of, contingently or otherwise, such
Indebtedness, including, with respect to WCI and its Restricted Subsidiaries, an
"Incurrence" of Indebtedness by reason of a Person becoming a Restricted
Subsidiary of WCI; provided, however, that neither the accrual of interest nor
the accretion of original issue discount shall be considered an Incurrence of
Indebtedness.

            "Indebtedness" means, with respect to any Person at any date of
determination (without duplication), (i) all indebtedness of such Person for
borrowed money, (ii) all obligations of such Person evidenced by bonds,
debentures, notes or other similar instruments (whether negotiable or
non-negotiable), (iii) all obligations of such Person in respect of letters of
credit or other similar instruments (including reimbursement obligations with
respect thereto), (iv) all obligations of such Person to pay the deferred and
unpaid purchase price of property or services,
<PAGE>
                                       9


which purchase price is due more than six months after the date of placing such
property in service or taking delivery and title thereto or the completion of
such services, except trade payables, (v) all obligations of such Person as
lessee under Capitalized Leases, (vi) all Indebtedness of other Persons secured
by a Lien on any asset of such Person, whether or not such Indebtedness is
assumed by such Person; provided, however, that the amount of such Indebtedness
shall be the lesser of (A) the fair market value of such asset at such date of
determination and (B) the amount of such Indebtedness, (vii) all Indebtedness of
other Persons Guaranteed by such Person to the extent such Indebtedness is
Guaranteed by such Person and (viii) to the extent not otherwise included in
this definition, obligations under Currency Agreements and Interest Rate
Agreements. The amount of Indebtedness of any Person at any date shall be the
outstanding balance at such date of all unconditional obligations as described
above and, with respect to contingent obligations that are included in any of
clauses (i) through (viii) above, the maximum liability upon the occurrence of
the contingency giving rise to the obligation, provided, however, that (A) the
amount outstanding at any time of any Indebtedness issued with original issue
discount is (1) for purposes of determining the Indebtedness to EBITDA Ratio,
the face amount of such Indebtedness less the remaining unamortized portion of
the original issue discount of such Indebtedness at such time as determined in
conformity with GAAP and (2) for all other purposes, the amount determined in
clause (1) on the date such Indebtedness is originally Incurred and (B)
Indebtedness shall not include any liability for federal, state, local or other
taxes.

            "Indebtedness to EBITDA Ratio" means, as at any date of
determination, the ratio of (i) the aggregate amount of Indebtedness of WCI and
its Restricted Subsidiaries on a consolidated basis ("Consolidated
Indebtedness") as at the date of determination (the "Transaction Date") to (ii)
the Consolidated EBITDA of WCI for the then most recent four full fiscal
quarters for which reports have been filed pursuant to Section 4.18 (such four
full fiscal quarter period being referred to herein as the "Four Quarter
Period"); provided, however, that (x) pro forma effect shall be given to any
Indebtedness Incurred from the beginning of the Four Quarter Period through the
Transaction Date (including any Indebtedness Incurred on the Transaction Date),
to the extent outstanding on the Transaction Date, (y) if during the period
commencing on the first day of such Four Quarter Period through the Transaction
Date (the "Reference Period"), WCI or any of the Restricted Subsidiaries shall
have engaged in any Asset Sale, Consolidated EBITDA for such period shall be
reduced by an amount equal to the EBITDA (if positive), or increased by an
amount equal to the EBITDA (if negative), directly attributable to the assets
which are the subject of such Asset Sale and any related retirement of
Indebtedness as if such Asset Sale and related retirement of Indebtedness had
occurred on the first day of such Reference Period or (z) if during such
Reference Period WCI or any of the Restricted Subsidiaries shall have made any
Asset Acquisition, Consolidated EBITDA of WCI shall be calculated on a pro forma
basis as if such Asset Acquisition and any Incurrence of Indebtedness to finance
such Asset Acquisition had taken place on the first day of such Reference
Period.
<PAGE>
                                       10


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

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

            "Interest Rate Agreement" means any interest rate protection
agreement, interest rate future agreement, interest rate option agreement,
interest rate swap agreement, interest rate cap agreement, interest rate collar
agreement, interest rate hedge agreement or other similar agreement or
arrangement designed to protect WCI or any of its Restricted Subsidiaries
against fluctuations in interest rates in respect of Indebtedness to or under
which WCI or any of its Restricted Subsidiaries is a party or a beneficiary on
the date of this Indenture or becomes a party or a beneficiary hereafter;
provided, however, that the notional principal amount thereof does not exceed
the principal amount of the Indebtedness of WCI and its Restricted Subsidiaries
that bears interest at floating rates.

            "Investment" in any Person means any direct or indirect advance,
loan or other extension of credit (including, without limitation, by way of
Guarantee or similar arrangement; but excluding advances to customers in the
ordinary course of business that are, in conformity with GAAP, recorded as
accounts receivable on the balance sheet of WCI or its Restricted Subsidiaries)
or capital contribution to (by means of any transfer of cash or other property
to others or any payment for property or services for the account or use of
others), or any purchase or acquisition of Capital Stock, bonds, notes,
debentures or other similar instruments issued by, such Person and shall include
(i) the designation of a Restricted Subsidiary as an Unrestricted Subsidiary and
(ii) the fair market value of the Capital Stock held by WCI and the Restricted
Subsidiaries of any Person that has ceased to be a Restricted Subsidiary by
reason of any transaction permitted by clause (iii) of Section 4.06. For
purposes of the definition of "Unrestricted Subsidiary" and Section 4.04, (i)
"Investment" shall include the fair market value of the assets (net of
liabilities) of any Restricted Subsidiary of WCI at the time that such
Restricted Subsidiary of WCI is designated an Unrestricted Subsidiary and shall
exclude the fair market value of the assets (net of liabilities) of any
Unrestricted Subsidiary at the time that such Unrestricted Subsidiary is
designated a Restricted Subsidiary of WCI and (ii) any property transferred to
or from an Unrestricted Subsidiary shall be valued at its fair market value at
the time of such transfer, in each case as determined by the Board of Directors
in good faith.

            "Lien" means any mortgage, pledge, security interest, encumbrance,
lien or charge of any kind (including, without limitation, any conditional sale
or other title retention agreement or lease in the nature thereof, any sale with
recourse against the seller or any Affiliate of the seller, or any agreement to
give any security interest).
<PAGE>
                                       11


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

            "Offer to Purchase" means an offer to purchase Securities by the
Company from the Holders required by Section 4.11 or Section 4.12 which is
commenced by mailing a notice to the Trustee and each Holder stating: (i) the
covenant pursuant to which the offer is being made and that all Securities
validly tendered will be accepted for payment on a pro rata basis; (ii) the
purchase price and the Payment Date; (iii) that any Security not tendered will
continue to accrue interest pursuant to its terms; (iv) that, unless the Company
defaults in the payment of the purchase price, any Security accepted for payment
pursuant to the Offer to Purchase shall cease to accrue interest on and after
the Payment Date; (v) that Holders electing to have a Security purchased
pursuant to the Offer to Purchase will be required to surrender the Security
together with the form entitled "Option of the Holder to Elect Purchase" on the
reverse side thereof completed, to the Paying Agent at the address specified in
the notice prior to the close of business on the Business Day immediately
preceding the Payment Date; (vi) that Holders will be entitled to withdraw their
election if the Paying Agent receives, not later than the close of
<PAGE>
                                       12


business on the third Business Day immediately preceding the Payment Date, a
telegram, facsimile transmission or letter setting forth the name of such
Holder, the principal amount of Securities delivered for purchase and a
statement that such Holder is withdrawing his election to have such Securities
purchased; and (vii) that Holders whose Securities are being purchased only in
part will be issued new Securities equal in principal amount (and accrued and
unpaid interest) to the unpurchased portion thereof; provided, however, that
each Security purchased and each new Security issued shall be in a principal
amount of $1,000 or integral multiples thereof. On the Payment Date, the Company
shall (i) accept for payment on a pro rata basis any Securities or portions
thereof tendered pursuant to an Offer to Purchase; (ii) deposit with the Paying
Agent money sufficient to pay the purchase price of all Securities or portions
thereof so accepted; and (iii) deliver, or cause to be delivered, to the Trustee
all Securities or portions thereof so accepted together with an Officers'
Certificate specifying the Securities or portions thereof accepted for payment
by the Company. The Paying Agent shall promptly mail to the Holders of the
Securities so accepted for payment in an amount equal to the purchase price, and
the Trustee shall promptly authenticate and mail to such Holders a new Security
equal in principal amount to any unpurchased portion of the Securities
surrendered; provided, however, that each Security purchased and each new
Security issued shall be in a principal amount of $1,000 or integral multiples
thereof. The Company will publicly announce the results of an Offer to Purchase
as soon as practicable after the Payment Date. The Trustee shall act as the
Paying Agent for an Offer to Purchase. The Company will comply with Rule 14e-1
under the Exchange Act and any other securities laws and regulations thereunder
to the extent such laws and regulations are applicable, in the event that the
Company is required to repurchase Securities pursuant to an Offer to Purchase.

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

            "Officers' Certificate" means a certificate signed by one Officer
listed in clause (i) of the definition thereof and one Officer listed in clause
(ii) of the definition thereof; provided, however, that any such certificate may
be signed by any two of the Officers listed in clause (i) of the definition
thereof in lieu of being signed by one Officer listed in clause (i) of the
definition thereof and one Officer listed in clause (ii) of the definition
thereof. Each Officers' Certificate (other than certificates provided pursuant
to TIA Section 314(a)(4)) shall include the statements provided for in TIA
Section 314(e).

            "Old Senior Notes" means the 14% Senior Discount Notes due 2005 of
WCI.
<PAGE>
                                       13


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

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

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

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

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

            "Permitted Liens" means (i) Liens for taxes, assessments,
governmental charges or claims that are being contested in good faith by
appropriate legal proceedings promptly instituted and diligently conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in conformity with GAAP shall have been made; (ii) statutory or common law Liens
of landlords and carriers, warehousemen, mechanics, suppliers, materialmen,
<PAGE>
                                       14


repairmen or other similar Liens arising in the ordinary course of business and
with respect to amounts not yet delinquent or being contested in good faith by
appropriate legal proceedings promptly instituted and diligently conducted and
for which a reserve or other appropriate provision, if any, as shall be required
in conformity with GAAP shall have been made; (iii) Liens incurred or deposits
made in the ordinary course of business in connection with workers'
compensation, unemployment insurance and other types of social security; (iv)
Liens incurred or deposits made to secure the performance of tenders, bids,
leases, statutory or regulatory obligations, bankers' acceptances, surety and
appeal bonds, government contracts, performance and return-of-money bonds and
other obligations of a similar nature incurred in the ordinary course of
business (exclusive of obligations for the payment of borrowed money) and a
bank's unexercised right of set-off with respect to deposits made in the
ordinary course; (v) easements, rights-of-way, municipal and zoning ordinances
and similar charges, encumbrances, title defects or other irregularities that do
not materially interfere with the ordinary course of business of WCI or any of
its Restricted Subsidiaries; (vi) Liens (including extensions and renewals
thereof) upon real or personal property acquired after the Closing Date;
provided, however, that (a) such Lien is created solely for the purpose of
securing Indebtedness Incurred in accordance with Section 4.03 either (1) to
finance the cost (including the cost of improvement or construction) of the item
of property or assets subject thereto and such Lien is created prior to, at the
time of or within six months after the later of the acquisition, the completion
of construction or the commencement of full operation of such property or (2) to
refinance any Indebtedness previously so secured, (b) the principal amount of
the Indebtedness secured by such Lien does not exceed 100% of such cost and (c)
any such Lien shall not extend to or cover any property or assets other than
such item of property or assets and any improvements on such item; (vii) leases
or subleases granted to others that do not materially interfere with the
ordinary course of business of WCI and its Restricted Subsidiaries, taken as a
whole; (viii) Liens encumbering property or assets under construction arising
from progress or partial payments by a customer of WCI or its Restricted
Subsidiaries relating to such property or assets; (ix) any interest or title of
a lessor in the property subject to any Capitalized Lease or operating lease;
(x) Liens arising from filing Uniform Commercial Code financing statements
regarding leases; (xi) Liens on property of, or on shares of stock or
Indebtedness of, any corporation existing at the time such corporation becomes,
or becomes a part of, any Restricted Subsidiary; provided, however, that such
Liens do not extend to or cover any property or assets of WCI or any Restricted
Subsidiary other than the property or assets acquired; (xii) Liens in favor of
WCI or any Restricted Subsidiary; (xiii) Liens arising from the rendering of a
final judgment or order against WCI or any Restricted Subsidiary of WCI that
does not give rise to an Event of Default; (xiv) Liens securing reimbursement
obligations with respect to letters of credit that encumber documents and other
property relating to such letters of credit and the products and proceeds
thereof; (xv) Liens in favor of customs and revenue authorities arising as a
matter of law to secure payment of customs duties in connection with the
importation of goods; (xvi) Liens encumbering customary initial deposits and
margin deposits, and other Liens that are either within the general parameters
customary in the industry and incurred in the
<PAGE>
                                       15


ordinary course of business, in each case, securing Indebtedness under Interest
Rate Agreements and Currency Agreements and forward contracts, options, futures
contracts, futures options or similar agreements or arrangements designed to
protect WCI or any of its Restricted Subsidiaries from fluctuations in the price
of commodities; (xvii) Liens arising out of conditional sale, title retention,
consignment or similar arrangements for the sale of goods entered into by WCI or
any of its Restricted Subsidiaries in the ordinary course of business in
accordance with the past practices of WCI and its Restricted Subsidiaries prior
to the Closing Date; and (xviii) Liens on or sales of receivables.

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

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

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

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

            "Redeemable Stock" means any class or series of Capital Stock of any
Person that by its terms or otherwise is (i) required to be redeemed prior to
the Stated Maturity of the Securities, (ii) redeemable at the option of the
holder of such class or series of Capital Stock at any time prior to the Stated
Maturity of the Securities (unless the redemption price is, at WCI's option,
without conditions precedent, payable solely in Common Stock (other than
Redeemable Stock) of WCI) or (iii) convertible into or exchangeable for Capital
Stock referred to in clause (i) or (ii) above or Indebtedness having a scheduled
maturity prior to the Stated Maturity of the Securities; provided, however, that
any Capital Stock that would not constitute Redeemable Stock but for provisions
thereof giving holders thereof the right to require such Person to repurchase or
redeem such Capital Stock upon the occurrence of an "asset sale" or "change of
control" occurring prior to the Stated Maturity of the Securities shall not
constitute Redeemable Stock if the "asset sale" or "change of control"
provisions applicable to such Capital Stock are no more favorable to the holders
of such Capital Stock than the provisions of Section 4.11 and Section 4.12 and
such Capital Stock specifically provides that such Person will not repurchase or
redeem any such stock pursuant to such provision prior to WCI's repurchase of
such Securities as are required to be repurchased pursuant to the provisions of
Section 4.11 and Section 4.12.
<PAGE>
                                       16


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

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

            "Registrar" has the meaning provided in Section 2.03.

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

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

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

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

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

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

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

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

            "Security Documents" means the Security Agreement and any other
agreements, instruments or documents entered into or delivered in connection
with any of the foregoing, as
<PAGE>
                                       17


such agreements, instruments or documents may from time to time be amended in
accordance with the terms hereof and thereof.

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

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

            "Senior Notes Indenture" means the indenture relating to the Senior
Notes, as originally executed or as it may be amended or supplemented from time
to time by one or more indentures supplemental thereto entered into pursuant to
the applicable provisions thereof.

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

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

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

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

            "Telecommunications Assets" means any (i) entity or business
substantially all the revenues of which are derived from (a) providing
transmission of sound, data or video; (b) the sale or provision of phone cards,
"800" services, voice mail, switching, enhanced telecommunications services,
telephone directory or telephone number information services or
telecommunications network intelligence; or (c) any business ancillary or
directly related to the businesses referred to in clause (a) or (b) above and
(ii) any assets used primarily to effect such transmission or provide the
products or services referred to in clause (a) or (b) above and any
<PAGE>
                                       18


directly related or ancillary assets including, without limitation, licenses and
applications, bids and agreements to acquire licenses, or other authority to
provide transmission services previously granted, or to be granted, by the FCC.

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

            "Temporary Cash Investment" means any of the following: (i) direct
obligations of the United States or any agency thereof or obligations fully and
unconditionally guaranteed by the United States or any agency thereof; (ii) time
deposit accounts, certificates of deposit and money market deposits maturing
within 180 days of the date of acquisition thereof issued by a bank or trust
company which is organized under the laws of the United States, any state
thereof or any foreign country recognized by the United States, and which bank
or trust company has capital, surplus and undivided profits aggregating in
excess of $50,000,000 (or the foreign currency equivalent thereof) and has
outstanding deposits or debt which is rated "A" (or such similar equivalent
rating) or higher by at least one nationally recognized statistical rating
organization (as defined in Rule 436 under the Securities Act) or any
money-market fund sponsored by a registered broker dealer or mutual fund
distributor; (iii) repurchase obligations with a term of not more than 30 days
for underlying securities of the types described in clause (i) above entered
into with a bank meeting the qualifications described in clause (ii) above; (iv)
commercial paper, maturing not more than six months after the date of
acquisition, issued by a corporation (other than an Affiliate of WCI) organized
and in existence under the laws of the United States, any state thereof or any
foreign country recognized by the United States with a rating at the time as of
which any investment therein is made of "P-1" (or higher) according to Moody's
Investors Service, Inc. or "A-1" (or higher) according to Standard & Poor's
Ratings Group; and (v) securities with maturities of six months or less from the
date of acquisition issued or fully and unconditionally guaranteed by any state,
commonwealth or territory of the United States, or by any political subdivision
or taxing authority thereof, and rated at least "A" by Standard & Poor's Ratings
Group or Moody's Investors Service, Inc.; provided, however, that,
notwithstanding the foregoing, the maturity of any of the foregoing that is
applied to provide security in favor of the Indebtedness referred to in clause
(v) of the second paragraph of Section 4.09 may occur as late as the earliest
date that such Indebtedness may be redeemed at the option of the obligor with
respect to such Indebtedness; and provided further, however, that WCI shall
cause such Liens referred to in such clause (v) to be incurred no later than the
first anniversary of the Closing Date.

            "TIA" or "Trust Indenture Act" means the Trust Indenture Act of
1939, as amended (15 U.S. Code ss.ss. 77aaa-77bbb), as in effect on the date
this Indenture was executed, except as provided in Section 9.06.
<PAGE>
                                       19


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

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

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

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

            "U.S. Government Obligations" means securities that are (i) direct
obligations of the United States of America for the payment of which its full
faith and credit is pledged or (ii) obligations of a Person controlled or
supervised by and acting as an agency or instrumentality of the United States of
America the payment of which is unconditionally guaranteed as a full faith and
credit obligation by the United States of America, which, in either case, are
not callable or redeemable at the option of the issuer thereof at any time prior
to the
<PAGE>
                                       20


Stated Maturity of the Securities, and shall also include a depositary receipt
issued by a bank or trust company as custodian with respect to any such U.S.
Government Obligation or a specific payment of interest on or principal of any
such U.S. Government Obligation held by such custodian for the account of the
holder of a depositary receipt; provided, however, that (except as required by
law) such custodian is not authorized to make any deduction from the amount
payable to the holder of such depositary receipt from any amount received by the
custodian in respect of the U.S. Government Obligation or the specific payment
of interest on or principal of the U.S. Government Obligation evidenced by such
depositary receipt.

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

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

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

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

            "WinStar Wireless" means WinStar Wireless, Inc.

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

            "indenture securities" means the Securities;

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

            "indenture to be qualified" means this Indenture;

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

            "obligor" on the indenture securities means the Company or any other
      obligor on the Securities.
<PAGE>
                                       21


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

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

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

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

            (iii) "or" is not exclusive;

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

            (v)   provisions apply to successive events and transactions;

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

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

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

                                  ARTICLE TWO
                                THE SECURITIES

            SECTION 2.01. Form and Dating. Provisions relating to the Initial
Securities, the Private Exchange Securities and the Exchange Securities are set
forth in the Rule 144A/Regulation S Appendix attached hereto (the "Appendix")
which is hereby incorporated in and expressly made part of this Indenture. The
Initial Securities and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit 1 to the Appendix (with such appropriate
insertions, omissions, substitutions and other variations as are required by
this Indenture) which is hereby incorporated in and expressly made a part of
this Indenture. The Exchange Securities, the Private Exchange Securities and the
Trustee's certificate of authentication shall be substantially in the form of
Exhibit A (with such appropriate
<PAGE>
                                       22


insertions, omissions, substitutions and other variations as are required by
this Indenture), which is hereby incorporated in and expressly made a part of
this Indenture. The Securities may have notations, legends or endorsements
required by law, stock exchange rule, agreements to which the Company is
subject, if any, or usage (provided that any such notation, legend or
endorsement is in a form acceptable to the Company). Each Security shall be
dated the date of its authentication. The terms of the Securities set forth in
the Appendix and Exhibit A are part of the terms of this Indenture.

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

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

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

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

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

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

            The Company shall enter into an appropriate agency agreement with
any Registrar, Paying Agent or co-registrar not a party to this Indenture, which
shall incorporate the terms of the TIA. The agreement shall implement the
provisions of this Indenture that relate
<PAGE>
                                       23


to such Agent. The Company shall notify the Trustee of the name and address of
any such Agent. If the Company fails to maintain a Registrar or Paying Agent,
the Trustee shall act as such and shall be entitled to appropriate compensation
therefor pursuant to Section 7.07. The Company or any of its domestically
incorporated Wholly Owned Subsidiaries may act as Paying Agent, Registrar,
co-registrar or transfer agent.

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

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

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

            SECTION 2.06. Transfer and Exchange. The Securities shall be issued
in registered form and shall be transferable only upon the surrender of a
Security for registration of transfer. When Securities are presented to the
Registrar or a co-registrar with a request (i) to register a transfer or (ii) to
exchange them for an equal principal amount of Securities of other
denominations, the Registrar shall register the transfer or make the transfer,
as requested if the requirements of Section 8-401(1) of the Uniform Commercial
Code are met; provided, however, that any Security presented or surrendered for
registration of transfer or exchange shall be duly endorsed or accompanied by a
written instrument of transfer in form satisfactory to the Registrar and the
Trustee duly executed by the Holder thereof or by his attorney duly authorized
in writing. To permit registration of transfers and exchanges, the Company shall
execute and the Trustee shall authenticate Securities at the Registrar's or
co-registrar's request. The Company may require payment of a sum sufficient to
pay all taxes, assessments or other governmental
<PAGE>
                                       24


charges in connection with any transfer or exchange pursuant to this Section.
The Company shall not be required to make and the Registrar need not register
transfers or exchanges of Securities selected for redemption (except, in the
case of Securities to be redeemed in part, the portion thereof not to be
redeemed) or any Securities for a period of 15 days before a selection of
Securities to be redeemed or 15 days before an interest payment date.

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

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

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

            Every replacement Security is an additional obligation of the
Company.

            SECTION 2.08. Outstanding Securities. Securities outstanding at any
time are all Securities authenticated by the Trustee except for those canceled
by it, those delivered to it for cancellation and those described in this
Section as not outstanding. A Security does not cease to be outstanding because
the Company or an Affiliate of the Company holds the Security; provided,
however, that, in determining whether the Holders of the requisite principal
amount of the outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor shall be disregarded and deemed not to be
outstanding, except that, in determining whether the Trustee shall be protected
in relying upon any such request, demand, authorization, direction, notice,
consent or waiver,
<PAGE>
                                       25


only Securities which the Trustee knows to be so owned shall be so disregarded.
Securities so owned which have been pledged in good faith may be regarded as
outstanding if the pledgee establishes to the satisfaction of the Trustee the
pledgee's right so to act with respect to such Securities and that the pledgee
is not the Company or any other obligor upon the Securities or any Affiliate of
the Company or of such other obligor.

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

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

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

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

            SECTION 2.11. Defaulted Interest. If and to the extent the Company
defaults in a payment of interest on the Securities, the Company shall pay
defaulted interest (plus interest on such defaulted interest to the extent
lawful) in any lawful manner. The Company may pay the defaulted interest to the
persons who are Securityholders on a subsequent special record date. The Company
shall fix or cause to be fixed any such special record date and payment date to
the reasonable satisfaction of the Trustee and shall promptly mail to each
Securityholder a notice that states the special record date, the payment date
and the amount of defaulted interest to be paid.
<PAGE>
                                       26


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

                                ARTICLE THREE
                                  REDEMPTION

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

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

            SECTION 3.02. Mandatory Redemption. In the event that by March 18,
1999, the Company shall not have applied at least $200.0 million to fund the
Acquisition Costs (as defined in Section 4.21) of Designated Equipment pursuant
to Section 4.21 ($200.0 million less the amount so applied being herein called
the "Unused Equipment Amount"), the Company shall redeem Securities in an
aggregate principal amount equal to the Unused Equipment Amount at a Redemption
Price of 112.5% of such principal amount, plus accrued and unpaid interest
thereon to the Redemption Date (subject to the right of Holders of record on the
relevant Regular Record Date that is on or prior to the Redemption Date to
receive interest due on the relevant Interest Payment Date).

            SECTION 3.03. Notices to Trustee. If the Company elects to redeem
Securities pursuant to Section 3.01 hereof or is required to redeem Securities
pursuant to Section 3.02 hereof, it shall notify the Trustee in writing of the
Redemption Date (which shall occur no later
<PAGE>
                                       27


than April 2, 1999, in the case of a mandatory redemption pursuant to Section
3.02) and the principal amount of Securities to be redeemed (which shall be
equal to the Unused Equipment Amount in the case of a mandatory redemption
pursuant to section 3.02) plus interest accrued and premium due thereon, if any,
to the Redemption Date.

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

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

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

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

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

            (a)   the Redemption Date;

            (b)   the Redemption Price;

            (c)   the name and address of the Paying Agent;
<PAGE>
                                       28


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

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

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

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

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

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

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

            Notice of redemption shall be deemed to be given when mailed,
whether or not the Holder receives the notice. In any event, failure to give
such notice, or any defect therein, shall not affect the validity of the
proceedings for the redemption of Securities held by Holders to whom such notice
was properly given.
<PAGE>
                                       29


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

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

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

                                 ARTICLE FOUR
                                   COVENANTS

            SECTION 4.01. Payment of Securities. The Company shall pay the
principal of, premium, if any, and interest on the Securities on the dates and
in the manner provided in the Securities and this Indenture. An installment of
principal, premium, if any, or interest shall be considered paid on the date due
if the Trustee or Paying Agent (other than the Company, a Subsidiary of the
Company, or any Affiliate of any of them) holds on that date money designated
for and sufficient to pay the installment. If the Company or any Subsidiary of
the Company or any Affiliate of any of them, acts as Paying Agent, an
installment of principal, premium, if any, or interest shall be considered paid
on the due date if the entity acting as Paying Agent complies with Section 2.04.
As provided in Section 6.09, upon any bankruptcy or reorganization procedure
relative to the Company, the Trustee shall serve as the Paying Agent and
conversion agent, if any, for the Securities.
<PAGE>
                                       30


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

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

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

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

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

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

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

            (ii) Indebtedness (A) to WCI evidenced by an unsubordinated
      promissory note or (B) to any of its Restricted Subsidiaries; provided,
      however, that any event which
<PAGE>
                                       31


      results in any such Restricted Subsidiary ceasing to be a Restricted
      Subsidiary or any subsequent transfer of such Indebtedness (other than to
      WCI or another Restricted Subsidiary) shall be deemed, in each case, to
      constitute an Incurrence of such Indebtedness not permitted by this clause
      (ii);

            (iii) Indebtedness issued in exchange for, or the net proceeds of
      which are used to refinance or refund, then outstanding Indebtedness,
      other than Indebtedness Incurred under clause (i), (ii), (v), (vi) or
      (viii) of this paragraph, and any refinancings thereof in an amount not to
      exceed the amount so refinanced or refunded (plus premiums, accrued
      interest, fees and expenses); provided, however, that Indebtedness the
      proceeds of which are used to refinance or refund the Securities or
      Indebtedness that is pari passu with, or subordinated in right of payment
      to, the Equipment Note Guarantee shall only be permitted under this clause
      (iii) if (A) in case the Securities are refinanced in part or the
      Indebtedness to be refinanced is pari passu with the Equipment Note
      Guarantee, such new Indebtedness, by its terms or by the terms of any
      agreement or instrument pursuant to which such new Indebtedness is
      outstanding, is expressly made pari passu with, or subordinate in right of
      payment to, the Equipment Note Guarantee, (B) in case the Indebtedness to
      be refinanced is subordinated in right of payment to the Equipment Note
      Guarantee, such new Indebtedness, by its terms or by the terms of any
      agreement or instrument pursuant to which such new Indebtedness is
      outstanding, is expressly made subordinate in right of payment to the
      Equipment Note Guarantee at least to the extent that the Indebtedness to
      be refinanced is subordinated to the Equipment Note Guarantee and (C) such
      new Indebtedness, determined as of the date of Incurrence of such new
      Indebtedness, does not mature prior to the Stated Maturity of the
      Indebtedness to be refinanced or refunded, and the Average Life of such
      new Indebtedness is at least equal to the remaining Average Life of the
      Indebtedness to be refinanced or refunded; provided further, however, that
      in no event may Indebtedness of WCI be refinanced by means of any
      Indebtedness of any Restricted Subsidiary of WCI pursuant to this clause
      (iii);

            (iv) Indebtedness (A) in respect of performance, surety or appeal
      bonds provided in the ordinary course of business, (B) under Currency
      Agreements and Interest Rate Agreements; provided, however, that such
      agreements do not increase the Indebtedness of the obligor outstanding at
      any time other than as a result of fluctuations in foreign currency
      exchange rates or interest rates or by reason of fees, indemnities and
      compensation payable thereunder; and (C) arising from agreements providing
      for indemnification, adjustment of purchase price or similar obligations,
      or from Guarantees or letters of credit, surety bonds or performance bonds
      securing any obligations of WCI or any of the Restricted Subsidiaries
      pursuant to such agreements, in any case Incurred in connection with the
      disposition of any business, assets or Restricted Subsidiary of WCI (other
      than Guarantees of Indebtedness Incurred by any Person acquiring all or
      any portion of such business, assets or Restricted Subsidiary of WCI for
      the purpose of
<PAGE>
                                       32


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

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

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

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

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

          (ix) Indebtedness of WCI, to the extent the proceeds thereof are
      immediately used to purchase Securities and the Senior Notes tendered in
      an Offer to Purchase made as a result of a Change of Control.
<PAGE>
                                       33


            (b) For purposes of determining any particular amount of
Indebtedness under this Section 4.03, Guarantees, Liens or obligations with
respect to letters of credit supporting Indebtedness otherwise included in the
determination of such particular amount shall not be included. For purposes of
determining compliance with this Section 4.03, in the event that an item of
Indebtedness meets the criteria of more than one of the types of Indebtedness
described in the above clauses, WCI, in its sole discretion, shall classify such
item of Indebtedness and only be required to include the amount and type of such
Indebtedness in one of such clauses.

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

            SECTION 4.04. Limitation on Restricted Payments. WCI will not, and
will not permit any Restricted Subsidiary to, directly or indirectly, (i)
declare or pay any dividend or make any distribution on its Capital Stock (other
than dividends or distributions payable solely in shares of its or such
Restricted Subsidiary's Capital Stock (other than Redeemable Stock) held by such
holders or in options, warrants or other rights to acquire such shares of
Capital Stock) other than such Capital Stock held by WCI or any of its
Restricted Subsidiaries (and other than pro rata dividends or distributions on
Common Stock of Restricted Subsidiaries); (ii) repurchase, redeem, retire or
otherwise acquire for value any shares of Capital Stock of WCI (including
options, warrants or other rights to acquire such shares of Capital Stock) held
by Persons other than any Wholly Owned Restricted Subsidiaries of WCI; (iii)
make any voluntary or optional principal payment, or voluntary or optional
redemption, repurchase, defeasance, or other acquisition or retirement for
value, of Indebtedness of WCI that is subordinated in right of payment to the
Equipment Note Guarantee; or (iv) make any Investment, other than a Permitted
Investment, in any Person (such payments or any other actions described in
clauses (i) through (iv) being collectively "Restricted Payments") if, at the
time of, and after giving effect to, the proposed Restricted Payment: (A) a
Default or Event of Default shall have occurred and be continuing, (B) except
with respect to any Investment (other than an Investment consisting of the
designation of a Restricted Subsidiary as an Unrestricted Subsidiary), WCI could
not Incur at least $1.00 of Indebtedness under the first paragraph of Section
4.03 or (C) the aggregate amount expended for all Restricted Payments (the
amount so expended, if other than in cash, to be determined in good faith by the
Board of Directors, whose determination shall be conclusive and evidenced by a
Board Resolution) after the Closing Date shall exceed the sum of (1) 50% of the
aggregate amount of the Adjusted Consolidated Net Income (or, if the Adjusted
Consolidated Net Income is a loss, minus 100% of such amount) (determined by
excluding income resulting from transfers of assets by WCI or a Restricted
Subsidiary to an Unrestricted Subsidiary) accrued on a cumulative basis during
the period (taken as one accounting period) beginning on the first day of the
fiscal quarter immediately following the Closing Date and ending on the last day
of the last fiscal quarter preceding the Transaction Date for which reports have
been filed pursuant to Section 4.18 plus (2) the aggregate Net Cash Proceeds
received by WCI after the Closing Date from the issuance and sale permitted by
this
<PAGE>
                                       34


Indenture of its Capital Stock (other than Redeemable Stock) to a Person who is
not a Subsidiary of WCI, or from the issuance to a Person who is not a
Subsidiary of WCI of any options, warrants or other rights to acquire Capital
Stock of WCI (in each case, exclusive of any convertible Indebtedness,
Redeemable Stock or any options, warrants or other rights that are redeemable at
the option of the Holder, or are required to be redeemed, prior to the Stated
Maturity of the Securities) plus (3) an amount equal to the net reduction in
Investments (other than reductions in Permitted Investments and other than
reductions in Investments made pursuant to clauses (vi) or (vii) of the second
paragraph of this Section 4.04) in any Person resulting from payments of
interest on Indebtedness, dividends, repayments of loans or advances, or other
transfers of assets, in each case to WCI or any Restricted Subsidiary (except to
the extent any such payment is included in the calculation of Adjusted
Consolidated Net Income), or from redesignations of Unrestricted Subsidiaries as
Restricted Subsidiaries (valued in each case as provided in the definition of
"Investments"), not to exceed the amount of Investments previously made by WCI
and its Restricted Subsidiaries in such Person.

            The foregoing provision shall not be violated by reason of:

            (i) the payment of any dividend within 60 days after the date of
      declaration thereof if, at said date of declaration, such payment would
      comply with the foregoing paragraph;

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

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

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

            (v) payments or distributions, in the nature of satisfaction of
      dissenters' rights, pursuant to or in connection with a consolidation,
      merger or transfer of assets that
<PAGE>
                                       35


      complies with the provisions of this Indenture applicable to mergers,
      consolidations and transfers of all or substantially all of the property
      and assets of WCI;

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

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

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

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

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

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

            Each Restricted Payment permitted pursuant to the preceding
paragraph (other than the Restricted Payment referred to in clause (ii)
thereof), and the Net Cash Proceeds from any issuance and sale of Capital Stock
referred to in clauses (iii) or (iv) shall be included in calculating whether
the conditions of clause (C) of the first paragraph of this Section 4.04 have
been met with respect to any subsequent Restricted Payments. In the event the
proceeds of an issuance of Capital Stock of WCI are used for the redemption,
repurchase or other acquisition of the Securities or Indebtedness that is pari
passu with the Equipment Note Guarantee then the
<PAGE>
                                       36


Net Cash Proceeds of such issuance shall be included in clause (C) of the first
paragraph of this Section 4.04 only to the extent such proceeds are not used for
such redemption, repurchase or other acquisition of Indebtedness.

            SECTION 4.05. Limitation on Dividend and Other Payment Restrictions
Affecting Restricted Subsidiaries. WCI will not, and will not permit any
Restricted Subsidiary to, create or otherwise cause or suffer to exist or become
effective any consensual encumbrance or restriction of any kind on the ability
of any Restricted Subsidiary to:

            (i) pay dividends or make any other distributions permitted by
      applicable law on any Capital Stock of such Restricted Subsidiary owned by
      WCI or any other Restricted Subsidiary;

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

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

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

            The foregoing provisions shall not prohibit any encumbrances or
restrictions:

            (i) existing on the Closing Date in this Indenture or any other
      agreement in effect on the Closing Date, and any extensions, refinancings,
      renewals or replacements of such agreements; provided, however, that the
      encumbrances and restrictions in any such extensions, refinancings,
      renewals or replacements are no less favorable in any material respect to
      the Holders than those encumbrances or restrictions that are then in
      effect and that are being extended, refinanced, renewed or replaced;

            (ii)  existing under or by reason of applicable law;

            (iii) existing with respect to any Person or the property or assets
      of such Person acquired by WCI or any Restricted Subsidiary, at the time
      of such acquisition and not incurred in contemplation thereof, which
      encumbrances or restrictions are not applicable to any Person or the
      property or assets of any Person other than such Person or the property or
      assets of such Person so acquired;
<PAGE>
                                       37


            (iv) in the case of clause (iv) of the first paragraph of this
      Section 4.05, (A) that restrict in a customary manner the subletting,
      assignment or transfer of any property or asset that is a lease, license,
      conveyance or contract or similar property or asset, (B) existing by
      virtue of any transfer of, agreement to transfer, option or right with
      respect to, or Lien on, any property or assets of WCI or any Restricted
      Subsidiary not otherwise prohibited by this Indenture or (C) arising or
      agreed to in the ordinary course of business, not relating to any
      Indebtedness, and that do not, individually or in the aggregate, detract
      from the value of property or assets of WCI or any Restricted Subsidiary
      in any manner material to WCI or any Restricted Subsidiary; or

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

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

            SECTION 4.06. Limitation on the Issuance of Capital Stock of
Restricted Subsidiaries. WCI will not sell, and will not permit any Restricted
Subsidiary, directly or indirectly, to issue or sell any shares of Capital Stock
of a Restricted Subsidiary (including options, warrants or other rights to
purchase shares of such Capital Stock) except:

            (i) to WCI or a Wholly Owned Restricted Subsidiary;

            (ii) issuances or sales to foreign nationals of shares of Capital
      Stock of foreign Restricted Subsidiaries, to the extent required by
      applicable law;

            (iii) if, immediately after giving effect to such issuance or sale,
      such Restricted Subsidiary would no longer constitute a Restricted
      Subsidiary; or

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

            SECTION 4.07. Limitation on Issuances of Guarantees by Restricted
Subsidiaries. WCI will not permit any Restricted Subsidiary, directly or
indirectly, to Guarantee
<PAGE>
                                       38


any Indebtedness of WCI ("Guaranteed Indebtedness"), unless (i) such Restricted
Subsidiary simultaneously executes and delivers a supplemental indenture to this
Indenture providing for a Guarantee (a "Subsidiary Guarantee") of payment of the
Securities by such Restricted Subsidiary and (ii) such Restricted Subsidiary
waives and will not in any manner whatsoever claim or take the benefit or
advantage of, any rights of reimbursement, indemnity or subrogation or any other
rights against WCI or any other Restricted Subsidiary as a result of any payment
by such Restricted Subsidiary under its Subsidiary Guarantee; provided, however,
that this paragraph shall not be applicable to any Guarantee of any Restricted
Subsidiary that (x) existed at the time such Person became a Restricted
Subsidiary and (y) was not Incurred in connection with, or in contemplation of,
such Person becoming a Restricted Subsidiary. If the Guaranteed Indebtedness is
(A) pari passu with the Equipment Note Guarantee, then the Guarantee of such
Guaranteed Indebtedness shall be pari passu with, or subordinated to, the
Subsidiary Guarantee or (B) subordinated to the Equipment Note Guarantee then
the Guarantee of such Guaranteed Indebtedness shall be subordinated to the
Subsidiary Guarantee at least to the extent that the Guaranteed Indebtedness is
subordinated to the Equipment Note Guarantee.

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

            SECTION 4.08. Limitation on Transactions with Shareholders and
Affiliates. WCI will not, and will not permit any Restricted Subsidiary to,
directly or indirectly, enter into, renew or extend any transaction (including,
without limitation, the purchase, sale, lease or exchange of property or assets,
or the rendering of any service) with any holder (or any Affiliate of such
holder) of 5% or more of any class of Capital Stock of WCI or with any Affiliate
of WCI or any Restricted Subsidiary, except upon fair and reasonable terms no
less favorable to WCI or such Restricted Subsidiary than could be obtained, at
the time of such transaction or, if such transaction is pursuant to a written
agreement, at the time of the execution of the agreement providing therefor, in
a comparable arm's-length transaction with a Person that is not such a holder or
an Affiliate.

            The foregoing limitation does not limit, and shall not apply to (i)
transactions (A) approved by a majority of the disinterested members of the
Board of Directors or (B) for which WCI or a Restricted Subsidiary delivers to
the Trustee a written opinion of a nationally recognized investment banking firm
stating that the transaction is fair to WCI or such Restricted Subsidiary from a
financial point of view; (ii) any transaction solely between WCI and any of
<PAGE>
                                       39


its Wholly Owned Restricted Subsidiaries or solely between Wholly Owned
Restricted Subsidiaries; (iii) the payment of reasonable fees to directors of
WCI who are not employees of WCI; (iv) any payments or other transactions
pursuant to any tax-sharing agreement between WCI and any other Person with
which WCI files a consolidated tax return or with which WCI is part of a
consolidated group for tax purposes; or (v) any Restricted Payments not
prohibited by the provisions of Section 4.04 (other than pursuant to clause (iv)
of the definition of "Permitted Investment" or clause (vi) of the second
paragraph of Section 4.04). Notwithstanding the foregoing, any transaction
covered by the first paragraph of this Section 4.08 and not covered by clauses
(ii) through (iv) of this paragraph, the aggregate amount of which exceeds
$250,000 in value, must be approved or determined to be fair in the manner
provided for in clause (i)(A) or (B) above.

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

            The foregoing limitation does not apply to:

            (i) Liens existing on the Closing Date;

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

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

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

            (v) Liens securing Indebtedness Incurred pursuant to the first
      sentence of Section 4.03;
<PAGE>
                                       40


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

            (vii) Permitted Liens.

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

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

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

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

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

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

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

            SECTION 4.11. Limitation on Assets Sales. WCI will not, and will not
permit any Restricted Subsidiary to, consummate any Asset Sale, unless (i) the
consideration received
<PAGE>
                                       41


by WCI or such Restricted Subsidiary is at least equal to the fair market value
of the assets sold or disposed of and (ii) at least 85% of the consideration
received consists of cash or Temporary Cash Investments. In the event and to the
extent that the Net Cash Proceeds received by WCI or its Restricted Subsidiaries
from one or more Asset Sales occurring on or after the Closing Date in any
period of 12 consecutive months exceed 10% of Adjusted Consolidated Net Tangible
Assets (determined as of the date closest to the commencement of such 12-month
period for which a consolidated balance sheet of WCI and its Subsidiaries has
been prepared), then WCI shall or shall cause the relevant Restricted Subsidiary
to (i) within six months after the date Net Cash Proceeds so received exceed 10%
of Adjusted Consolidated Net Tangible Assets (A) apply an amount equal to such
excess Net Cash Proceeds to permanently repay unsubordinated Indebtedness of
WCI, or Indebtedness of any Restricted Subsidiary, in each case owing to a
Person other than WCI or any of its Restricted Subsidiaries or (B) invest an
equal amount, or the amount not so applied pursuant to clause (A) (or enter into
a definitive agreement committing to so invest within six months after the date
of such agreement), in property or assets of a nature or type or that are used
in a business (or in a company having property and assets of a nature or type,
or engaged in a business) similar or related to the nature or type of the
property and assets of, or the business of, WCI and its Restricted Subsidiaries
existing on the date of such investment (as determined in good faith by the
Board of Directors, whose determination shall be conclusive and evidenced by a
Board Resolution) and (ii) apply (no later than the end of the six-month period
referred to in clause (i)) such excess Net Cash Proceeds (to the extent not
applied pursuant to clause (i)) as provided in the following paragraph of this
Section 4.11. The amount of such excess Net Cash Proceeds required to be applied
(or to be committed to be applied) during such six-month period as set forth in
clause (i) of the preceding sentence and not applied as so required by the end
of such period shall constitute "Excess Proceeds."

            If, as of the first day of any calendar month, the aggregate amount
of Excess Proceeds not theretofore subject to an Offer to Purchase pursuant to
this Section 4.11 totals at least $10,000,000, WCI or the Company must commence,
not later than the 15th Business Day after the first day of such month, and
consummate an Offer to Purchase from the Holders on a pro rata basis an
aggregate principal amount of Securities equal to the Excess Proceeds on such
date, at a purchase price equal to 101% of the principal amount of such
Securities on such date of purchase, plus accrued and unpaid interest (if any)
on such amount to the date of purchase.

            Notwithstanding the foregoing, the Company will not, and WCI will
not permit the Company to, consummate any Asset Sale of Collateral unless (A)
such Asset Sale complies with clause (i) and (ii) of the first paragraph of this
Section 4.11 and the Company applies the Net Cash Proceeds from the Asset Sale
within 45 days following the receipt of such Net Cash Proceeds to acquire
additional Designated Equipment and (B) the Company takes such action as is
necessary to vest in the Trustee a security interest in such additional
Designated Equipment pursuant to Section 4.22 and the Security Documents.
<PAGE>
                                       42


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

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

            SECTION 4.13. Existence. Subject to Articles Four and Five of this
Indenture, WCI will do or cause to be done all things necessary to preserve and
keep in full force and effect its existence and the existence of each of its
Restricted Subsidiaries in accordance with the respective organizational
documents of WCI and each such Subsidiary and the rights (whether pursuant to
charter, partnership certificate, agreement, statute or otherwise), material
licenses and franchises of WCI and each such Subsidiary; provided, however, that
WCI shall not be required to preserve any such right, license or franchise, or
the existence of any Restricted Subsidiary (other than of WCI), if the
maintenance or preservation thereof is no longer desirable in the conduct of the
business of WCI and its Restricted Subsidiaries taken as a whole. In addition,
WCI agrees to take such actions, within a reasonable time after the Closing Date
(and in any event prior to any proceeding initiated regarding the dissolution of
WCI), as may be necessary to ensure that it shall be in good standing under the
laws of the jurisdiction of its incorporation.
<PAGE>
                                       43


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

            SECTION 4.15. Maintenance of Properties and Insurance. WCI will
cause all properties used or useful in the conduct of its business or the
business of any of its Restricted Subsidiaries, to be maintained and kept in
reasonable condition, repair and working order and supplied with all necessary
equipment and will cause to be made all necessary repairs, renewals,
replacements, betterments and improvements thereof, all as in the judgment of
WCI may be necessary so that the business carried on in connection therewith may
be properly and advantageously conducted at all times; provided, however, that
nothing in this Section 4.15 shall prevent WCI or any such Subsidiary from
discontinuing the use, operation or maintenance of any of such properties or
disposing of any of them, if such discontinuance or disposal is, in the judgment
of WCI, desirable in the conduct of the business of WCI or such Subsidiary.

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

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

            SECTION 4.17. Compliance Certificates. (a) Each of WCI and the
Company shall deliver to the Trustee, within 90 days after the end of WCI's
fiscal year, an Officers' Certificate stating whether or not the signers know of
any Default or Event of Default that occurred during such fiscal year. Such
certificates shall contain a certification from the principal executive officer,
principal financial officer or principal accounting officer of WCI and the
<PAGE>
                                       44


Company that a review has been conducted of the activities of WCI, the Company
and the Restricted Subsidiaries and WCI's, the Company's and the Restricted
Subsidiaries' performance under this Indenture and that, to the best knowledge
of such officer, each of WCI and the Company has complied with all conditions
and covenants under this Indenture. For purposes of this Section 4.17, such
compliance shall be determined without regard to any period of grace or
requirement of notice provided under this Indenture. If they do know of such a
Default or Event of Default, the certificate shall describe any such Default or
Event of Default and its status.

            (b) WCI shall (to the extent not prohibited by applicable accounting
rules) deliver to the Trustee, within 90 days after the end of its fiscal year,
a certificate signed by WCI's independent certified public accountants stating
(i) that their audit examination has included a review of the terms of this
Indenture and the Securities as they relate to accounting matters, (ii) that
they have read the most recent Officers' Certificate delivered to the Trustee
pursuant to paragraph (a) of this Section 4.17 and (iii) whether, in connection
with their audit examination, anything came to their attention that caused them
to believe that WCI or the Company, as the case may be, was not in compliance
with any of the terms, covenants, provisions or conditions of Article Four and
Section 5.01 of this Indenture as they pertain to accounting matters and, if any
Default or Event of Default has come to their attention, specifying the nature
and period of existence thereof; provided, however, that such independent
certified public accountants shall not be liable in respect of such statement by
reason of any failure to obtain knowledge of any such Default or Event of
Default that would not be disclosed in the course of an audit examination
conducted in accordance with generally accepted auditing standards in effect at
the date of such examination.

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

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

            SECTION 4.19. Waiver of Stay, Extension or Usury Laws. The Company
covenants (to the extent that it may lawfully do so) that it will not at any
time insist upon, or plead, or in any manner whatsoever claim or take the
benefit or advantage of, any stay or extension law or any usury law or other law
that would prohibit or forgive the Company from paying all or any portion of the
principal of, premium, if any, or interest on the Securities as
<PAGE>
                                       45


contemplated herein, wherever enacted, now or at any time hereafter in force, or
that may affect the covenants or the performance of this Indenture; and (to the
extent that it may lawfully do so) the Company hereby expressly waives all
benefit or advantage of any such law and covenants that it will not hinder,
delay or impede the execution of any power herein granted to the Trustee, but
will suffer and permit the execution of every such power as though no such law
had been enacted.

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

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

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

            SECTION 4.21. Use of Proceeds. The Company shall, and WCI shall
cause the Company to, apply the gross proceeds received by the Company from the
sale of the Securities to acquire Designated Equipment, including the payment of
the purchase price therefor and shipping, handling, storage, transportation,
testing and insurance charges, design, integration and site preparation expenses
and installation and service/warranty costs associated with the acquisition of
any Designated Equipment (collectively, "Acquisition Costs"). On the Closing
Date, the Company shall acquire Designated Equipment having an Acquisition Cost
of at least $10.0 million. Any gross proceeds not applied on the Closing Date to
acquire Designated Equipment pursuant to this Section 4.21 shall be invested by
the Company in Temporary Cash Investments pending application of such gross
proceeds to acquire Designated Equipment (or application of such gross proceeds
pursuant to Section 3.02 of the Securities).

            SECTION 4.22. Purchase Money Security Interests. Upon the
acquisition by the Company of Designated Equipment, the Company shall, and WCI
shall cause the Company to, take such action as is required to vest in the
Trustee a security interest in such Designated Equipment, for the benefit of the
Holders of Securities, and thereupon all provisions of this Indenture and the
Security Documents relating to Collateral shall be deemed to relate to and
include such Designated Equipment. On the Closing Date and from time to time if
requested by the Trustee, the Company shall, and WCI shall cause the Company to,
execute such security instruments and financing statements as may be reasonably
necessary to vest in the Trustee such security interests. In addition, with
respect to any telecommunications switch that constitutes Designated Equipment
acquired pursuant to Section 4.21, the Company shall post a notice on, or in the
location housing, such telecommunications switch, identifying the Company as the
<PAGE>
                                       46


owner of such telecommunications switch and stating that such telecommunications
switch is subject to the security interest under this Indenture and the Security
Documents.

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

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

                                 ARTICLE FIVE
                             SUCCESSOR CORPORATION

            SECTION 5.01. When WCI or the Company May Merge, Etc. (a) WCI shall
not consolidate with, merge with or into, or sell, convey, transfer, lease or
otherwise dispose of all or substantially all of its property and assets (as an
entirety or substantially an entirety in one transaction or a series of related
transactions) to, any Person (other than a consolidation or merger with or into
a Wholly Owned Restricted Subsidiary with a positive net worth; provided,
however, that, in connection with any such merger or consolidation, no
consideration (other than Common Stock in the surviving Person or WCI) shall be
issued or distributed to the stockholders of WCI) or permit any Person to merge
with or into WCI unless:

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

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

            (iii) immediately after giving effect to such transaction on a pro
      forma basis, WCI or any Person becoming the successor obligor of the
      Securities shall have a
<PAGE>
                                       47


      Consolidated Net Worth equal to or greater than the Consolidated Net Worth
      of WCI immediately prior to such transaction;

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

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

provided, however, that clauses (iii) and (iv) above do not apply if, in the
good faith determination of the Board of Directors of WCI, whose determination
shall be evidenced by a Board Resolution, the principal purpose of such
transaction is to change the state of incorporation of WCI; provided further,
however, that any such transaction shall not have as one of its purposes the
evasion of the foregoing limitations.

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

            SECTION 5.02. Successor Substituted. Upon any consolidation or
merger, or any sale, conveyance, transfer or other disposition of all or
substantially all of the property and assets of WCI or the Company, as the case
may be, in accordance with Section 5.01 of this Indenture, the successor Person
formed by such consolidation or into which WCI or the Company, as the case may
be, is merged or to which such sale, conveyance, transfer or other disposition
is made shall succeed to, and be substituted for, and may exercise every right
and
<PAGE>
                                       48


power of, WCI or the Company, as the case may be, under this Indenture with the
same effect as if such successor Person had been named as WCI or the Company, as
the case may be, herein.

                                  ARTICLE SIX
                             DEFAULT AND REMEDIES

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

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

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

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

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

            (e) any final judgment or order (not covered by insurance) for the
      payment of money in excess of $25,000,000 in the aggregate for all such
      final judgments or orders against all such Persons (treating any
      deductibles, self-insurance or retention as not so covered) shall be
      rendered against WCI or any Significant Subsidiary and shall not be paid
      or discharged, and there shall be any period of 60 consecutive days
      following entry of the final judgment or order that causes the aggregate
      amount for all such final
<PAGE>
                                       49


      judgments or orders outstanding and not paid or discharged against all
      such Persons to exceed $25,000,000 during which a stay of enforcement of
      such final judgment or order, by reason of a pending appeal or otherwise,
      shall not be in effect;

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

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

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

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

            SECTION 6.02. Acceleration. If an Event of Default (other than an
Event of Default specified in clause (f) or (g) of Section 6.01 that occurs with
respect to the Company or WCI) occurs and is continuing under this Indenture,
the Trustee or the Holders of at least 25% in aggregate principal amount of the
Securities, then outstanding, by written notice to the Company and WCI (and to
the Trustee if such notice is given by the Holders), may, and the Trustee at the
request of such Holders shall, declare the principal of, premium, if any, and
accrued interest on the Securities to be immediately due and payable. Upon a
declaration of acceleration, such principal, premium, if any, and accrued
interest shall be immediately due and payable. In the event of a declaration of
acceleration because an Event of Default set forth in clause (d) of Section 6.01
has occurred and is continuing, such declaration of acceleration shall be
automatically rescinded and annulled if the event of default triggering such
Event of Default
<PAGE>
                                       50


pursuant to clause (d) shall be remedied or cured by the Company, WCI or the
relevant Significant Subsidiary or waived by the holders of the relevant
Indebtedness within 60 days after the declaration of acceleration with respect
thereto. If an Event of Default specified in clause (f) or (g) of Section 6.01
occurs with respect to the Company or WCI, the principal of, premium, if any,
and accrued interest on the Securities then outstanding shall ipso facto become
and be immediately due and payable without any declaration or other act on the
part of the Trustee or any Holder.

            At any time after such a declaration of acceleration, but before a
judgment or decree for the payment of the money due has been obtained by the
Trustee, the Holders of at least a majority in principal amount of the
outstanding Securities by written notice to the Company, WCI and to the Trustee,
may waive all past Defaults and rescind and annul such declaration of
acceleration and its consequences if (a) the Company has paid or deposited with
the Trustee a sum sufficient to pay (i) all sums paid or advanced by the Trustee
hereunder and the reasonable compensation, expenses, disbursements and advances
of the Trustee, its agents and counsel, (ii) all overdue interest on all
Securities, (iii) the principal of and premium, if any, on any Securities that
have become due otherwise than by such declaration or occurrence of acceleration
and interest thereon at the rate prescribed therefor by such Securities, and
(iv) to the extent that payment of such interest is lawful, interest upon
overdue interest at the rate prescribed therefor by such Securities, (b) all
existing Events of Default, other than the non-payment of the principal of,
premium, if any, and accrued interest on the Securities that have become due
solely by such declaration of acceleration, have been cured or waived and (c)
the rescission would not conflict with any judgment or decree of a court of
competent jurisdiction.

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

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

            SECTION 6.04. Waiver of Past Defaults. Subject to Sections 6.02,
6.07 and 9.02, the Holders of at least a majority in principal amount of the
outstanding Securities, by written notice to the Trustee, may waive all past
Defaults and Events of Default and rescind and annul a declaration of
acceleration (except a Default in the payment of principal of, premium, if any,
or interest on any Security as specified in clause (a) or (b) of Section 6.01 or
in respect of a covenant or provision of this Indenture which cannot be modified
or amended without the consent of the holder of each outstanding Security
affected) if (i) all existing Events of Default, other than the nonpayment of
principal of, premium, if any, or interest on the Securities that have become
due solely by such declaration of acceleration, have been cured or waived and
<PAGE>
                                       51


(ii) the rescission would not conflict with any judgment or decree of a court of
competent jurisdiction. Upon any such waiver, such Default shall cease to exist,
and any Event of Default arising therefrom shall be deemed to have been cured,
for every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other Default or Event of Default or impair any right consequent
thereto.

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

            SECTION 6.06. Limitation on Suits. A Holder or Holders may not
institute any proceeding, judicial or otherwise, with respect to this Indenture,
the Security Documents or the Securities, or for the appointment of a receiver
or trustee, or for any other remedy hereunder, unless:

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

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

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

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

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

            For purposes of Section 6.05 of this Indenture and this Section
6.06, the Trustee shall comply with TIA Section 316(a) in making any
determination of whether the Holders of
<PAGE>
                                       52


the required aggregate principal amount of outstanding Securities have concurred
in any request or direction of the Trustee to pursue any remedy available to the
Trustee or the Holders with respect to this Indenture or the Securities or
otherwise under the law.

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

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

            SECTION 6.08. Collection Suit by Trustee. If an Event of Default in
payment of principal, premium or interest specified in clause (a), (b) or (c) of
Section 6.01 occurs and is continuing, the Trustee may recover judgment in its
own name and as trustee of an express trust against the Company or any other
obligor of the Securities for the whole amount of principal, premium, if any,
and accrued interest remaining unpaid, together with interest on overdue
principal, premium, if any, and, to the extent that payment of such interest is
lawful, interest on overdue installments of interest, in each case at the rate
specified in the Securities, and such further amount as shall be sufficient to
cover the costs and expenses of collection, including the reasonable
compensation, expenses, disbursements and advances of the Trustee, its agents
and counsel.

            SECTION 6.09. Trustee May File Proofs of Claim. The Trustee may file
such proofs of claim and other papers or documents as may be necessary or
advisable in order to have the claims of the Trustee (including any claim for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 7.07) and the Holders allowed in any judicial proceedings relative to
the Company (or any other obligor of the Securities), its creditors or its
property and shall be entitled and empowered to collect and receive any monies,
securities or other property payable or deliverable upon conversion or exchange
of the Securities or upon any such claims and to distribute the same, and any
custodian, receiver, assignee, trustee, liquidator, sequestrator or other
similar official in any such judicial proceeding is hereby authorized by each
Holder to make such payments to the Trustee and, in the event that the Trustee
shall consent to the making of such payments directly to the Holders, to pay to
the Trustee any amount due to it for the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agent and counsel, and any other
amounts due the Trustee under Section 7.07. Nothing herein contained shall be
deemed to empower the Trustee to authorize or consent to, or accept or adopt on
behalf of any Holder, any plan of reorganization, arrangement, adjustment or
composition affecting the
<PAGE>
                                       53


Securities or the rights of any Holder thereof, or to authorize the Trustee to
vote in respect of the claim of any Holder in any such proceeding.

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

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

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

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

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

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

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

            SECTION 6.13. Rights and Remedies Cumulative. Except as otherwise
provided with respect to the replacement or payment of mutilated, destroyed,
lost or wrongfully taken
<PAGE>
                                       54


Securities in Section 2.07, no right or remedy herein conferred upon or reserved
to the Trustee or to the Holders is intended to be exclusive of any other right
or remedy, and every right and remedy shall, to the extent permitted by law, be
cumulative and in addition to every other right and remedy given hereunder or
now or hereafter existing at law or in equity or otherwise. The assertion or
employment of any right or remedy hereunder, or otherwise, shall not prevent the
concurrent assertion or employment of any other appropriate right or remedy.

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


                                 ARTICLE SEVEN
                                    TRUSTEE

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

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

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

            (ii) before the Trustee acts or refrains from acting, it may require
      an Officers' Certificate or an Opinion of Counsel. The Trustee shall not
      be liable for any action it takes or omits to take in good faith in
      reliance on such certificate, opinion and/or an accountants' certificate;
<PAGE>
                                       55


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

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

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

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

            (vii) the Trustee shall not be bound to make any investigation into
      the facts or matters stated in any resolution, certificate, statement,
      instrument, opinion, report, notice, request, direction, consent, order,
      bond, debenture, note, other evidence of indebtedness or other paper or
      document, but the Trustee, in its discretion, may make such further
      inquiry or investigation into such facts or matters as it may see fit,
      and, if the Trustee shall determine to make such further inquiry or
      investigation, it shall be entitled to examine the books, records and
      premises of the Company personally or by agent or attorney; and

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

            SECTION 7.03. Individual Rights of Trustee. The Trustee, in its
individual or any other capacity, may become the owner or pledgee of Securities
and may otherwise deal with the Company or its Affiliates with the same rights
it would have if it were not the Trustee. Any
<PAGE>
                                       56


Agent may do the same with like rights. However, the Trustee is subject to TIA
Sections 310(b) and 311.

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

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

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

            SECTION 7.07. Compensation and Indemnity. The Company shall pay to
the Trustee from time to time and upon the Trustee's request such compensation
as shall be agreed upon in writing for its services in any capacity hereunder.
The compensation of the Trustee shall not be limited by any law on compensation
of a trustee of an express trust. The Company shall reimburse the Trustee upon
request for all reasonable out-of-pocket expenses and advances incurred or made
by the Trustee; provided, however, that the Trustee shall be under no obligation
whatsoever under this Indenture or any other document delivered in connection
with the Securities, to advance or expend its own funds. Such expenses shall
include the reasonable compensation and expenses of the Trustee's agents and
counsel.

            The Company shall indemnify the Trustee for, and hold it harmless
against, any loss or liability or expense incurred by it without negligence or
bad faith on its part in connection with the acceptance or administration of
this Indenture and its duties under this Indenture and the Securities,
including, without limitation, the costs and expenses of defending itself
against any claim or liability and of complying with any process served upon it
or any of
<PAGE>
                                       57


its officers in connection with the exercise or performance of any of its powers
or duties under this Indenture and the Securities.

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

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

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

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

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

            A successor Trustee shall deliver a written acceptance of its
appointment to the retiring Trustee and to the Company. Immediately after the
delivery of such written acceptance, either subject to the lien provided in
Section 7.07 or less amounts retained by the retiring Trustee to satisfy amounts
owed to it pursuant to the terms of this Indenture, including but not limited to
Section 7.07 hereof, as the retiring Trustee determines, (i) the retiring
Trustee shall transfer all property held by it as Trustee to the successor
Trustee, (ii) the resignation or removal of the retiring Trustee shall become
effective and (iii) the successor Trustee shall have
<PAGE>
                                       58


all the rights, powers and duties of the Trustee under this Indenture. A
successor Trustee shall mail notice of its succession to each Holder.

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

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

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

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

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

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

            SECTION 7.12. Withholding Taxes. The Trustee, as agent for the
Company, shall exclude and withhold from each payment of principal and interest
and other amounts due hereunder or under the Securities any and all withholding
taxes applicable thereto as required by law. The Trustee agrees to act as such
withholding agent and, in connection therewith, whenever any present or future
taxes or similar charges are required to be withheld with respect to any amounts
payable in respect of the Securities, to withhold such amounts and timely pay
the same to the appropriate authority in the name of and on behalf of the
holders of the Securities, that it will file any necessary withholding tax
returns or statements when due, and that, as promptly as possible after the
payment thereof, it will deliver to each Holder of a
<PAGE>
                                       59


Security appropriate documentation showing the payment thereof, together with
such additional documentary evidence as such Holders may reasonably request from
time to time.

                                 ARTICLE EIGHT
                            DISCHARGE OF INDENTURE

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

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

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

            With respect to the foregoing clause (i), the Company's obligations
under Section 7.07 shall survive. With respect to the foregoing clause (ii), the
Company's obligations in Sections 2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.11,
4.01, 4.02, 7.07, 7.08, 8.04, 8.05 and 8.06 shall survive until the Securities
are no longer outstanding. Thereafter, only the Company's obligations in
Sections 7.07, 8.05 and 8.06 shall survive. After any such irrevocable
<PAGE>
                                       60


deposit, the Trustee upon request shall acknowledge in writing the discharge of
the Company's obligations, as the case may be, under the Securities and this
Indenture except for those surviving obligations specified above.

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

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

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

            (C) immediately after giving effect to such deposit on a pro forma
      basis, no Default or Event of Default shall have occurred and be
      continuing on the date of such deposit; and no Default or Event of Default
      shall occur during the period ending on the 123rd day (or one year) after
      such date of deposit;
<PAGE>
                                       61


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

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

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

            Notwithstanding the foregoing, prior to the end of the 123-day (or
one year) period referred to in clause (D)(2)(y) of this Section 8.02, none of
the Company's obligations under this Indenture shall be discharged. Subsequent
to the end of such 123-day (or one year)
<PAGE>
                                       62


period with respect to this Section 8.02, the Company's obligations in Sections
2.02, 2.03, 2.04, 2.05, 2.06, 2.07, 2.11, 4.01, 4.02, 7.07, 7.08, 8.05 and 8.06
shall survive until the Securities are no longer outstanding. Thereafter, only
the Company's obligations in Sections 7.07, 8.05 and 8.06 shall survive. If and
when a ruling from the Internal Revenue Service or an Opinion of Counsel
referred to in clause (D)(1) of this Section 8.02 may be provided specifically
without regard to, and not in reliance upon, the continuance of the Company's
obligations under Section 4.01, then the Company's obligations under such
Section 4.01 shall cease upon delivery to the Trustee of such ruling or Opinion
of Counsel and compliance with the other conditions precedent provided for
herein relating to the defeasance contemplated by this Section 8.02.

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

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

            (i) with reference to this Section 8.03, the Company has irrevocably
      deposited or caused to be irrevocably deposited with the Trustee (or
      another trustee satisfying the requirements of Section 7.10) and conveyed
      all right, title and interest to the Trustee for the benefit of the
      Holders, under the terms of an irrevocable trust agreement in form and
      substance satisfactory to the Trustee as trust funds in trust,
      specifically pledged to the Trustee for the benefit of the Holders as
      security for payment of the principal of, premium, if any, and interest,
      if any, on the Securities, and dedicated solely to, the benefit of the
      Holders, in and to (A) money in an amount, (B) U.S. Government Obligations
      that, through the payment of interest and principal in respect thereof in
      accordance with their terms, will provide, not later than one day before
      the due date of any payment referred to in this clause (i), money in an
      amount or (C) a combination thereof in an amount sufficient, in the
      opinion of a nationally recognized firm of independent public accountants
      expressed in a written certification thereof delivered to the Trustee, to
      pay and discharge, without consideration of the reinvestment of such
      interest and after payment of all federal, state and local taxes or other
      charges and assessments in respect thereof payable by the Trustee, the
      principal of, premium, if any,
<PAGE>
                                       63


      and interest on the outstanding Securities on the Stated Maturity or
      earlier optional redemption of such principal or interest; provided,
      however, that the Trustee shall have been irrevocably instructed to apply
      such money or the proceeds of such U.S. Government Obligations to the
      payment of such principal, premium, if any, and interest with respect to
      the Securities;

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

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

            (iv) the Company has delivered to the Trustee an Opinion of Counsel
      to the effect that (A) the creation of the defeasance trust does not
      violate the Investment Company Act of 1940, (B) the Holders have a valid
      first-priority security interest in the trust funds, (C) the Holders will
      not recognize income, gain or loss for federal income tax purposes as a
      result of such deposit and the defeasance of the obligations referred to
      in the first paragraph of this Section 8.03 and will be subject to federal
      income tax on the same amount and in the same manner and at the same times
      as would have been the case if such deposit and defeasance had not
      occurred and (D) after the passage of 123 days following the deposit
      (except, with respect to any trust funds for the account of any Holder who
      may be deemed to be an "insider" for purposes of the United States
      Bankruptcy Code, after one year following the deposit), the trust funds
      will not be subject to the effect of Section 547 of the United States
      Bankruptcy Code or Section 15 of the New York Debtor and Creditor Law in a
      case commenced by or against the Company under either such statute, and
      either (1) the trust funds will no longer remain the property of the
      Company (and therefore will not be subject to the effect of any applicable
      bankruptcy, insolvency, reorganization or similar laws affecting
      creditors' rights generally) or (2) if a court were to rule under any such
      law in any case or proceeding that the trust funds remained property of
      the Company (x) assuming such trust funds remained in the possession of
      the Trustee prior to such court ruling to the extent not paid to the
      Holders, the Trustee will hold, for the benefit of the Holders, a valid
      and perfected security interest in such trust funds that is not avoidable
      in bankruptcy or otherwise (except for the effect of Section 552(b) of the
      United States Bankruptcy Code on interest on the trust funds accruing
      after the commencement of a case under such statute), (y) the Holders will
      be entitled to receive adequate protection of their interests in such
      trust funds if such trust funds are used in such case or proceeding and
      (z) no property, rights in property or other interests granted to the
      Trustee or the Holders in exchange for, or with respect to, such trust
      funds will be
<PAGE>
                                       64


      subject to any prior rights of holders of other Indebtedness of the
      Company or any of its Subsidiaries;

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

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

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

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

            SECTION 8.06. Reinstatement. If the Trustee or Paying Agent is
unable to apply any money or U.S. Government Obligations in accordance with
Section 8.01, 8.02 or 8.03, as the case may be, by reason of any legal
proceeding or by reason of any order or judgment of any court or governmental
authority enjoining, restraining or otherwise prohibiting such application, the
Company's obligations under this Indenture and the Securities shall be revived
and reinstated as though no deposit had occurred pursuant to Section 8.01, 8.02
or 8.03, as the case may be, until such time as the Trustee or Paying Agent is
permitted to apply all such
<PAGE>
                                       65


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

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

                                 ARTICLE NINE
                      AMENDMENTS, SUPPLEMENTS AND WAIVERS

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

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

            (b) to comply with Article Five;

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

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

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

            SECTION 9.02. With Consent of Holders. Subject to Sections 6.04 and
6.07 and without prior notice to the Holders, the Company, when authorized by
its Board of Directors (as evidenced by a Board Resolution), and the Trustee may
amend this Indenture and the Securities with the written consent of the Holders
of a majority in principal amount of the Securities then outstanding, and the
Holders of a majority in principal amount of the Securities
<PAGE>
                                       66


then outstanding by written notice to the Trustee may waive future compliance by
the Company with any provision of this Indenture or the Securities.

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

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

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

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

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

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

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

            After an amendment, supplement or waiver under this Section 9.02
becomes effective, the Company shall mail to the Holders affected thereby a
notice briefly describing the amendment, supplement or waiver. The Company will
mail supplemental indentures to Holders upon request. Any failure of the Company
to mail such notice, or any defect therein, shall not, however, in any way
impair or affect the validity of any such supplemental indenture or waiver.
<PAGE>
                                       67


            SECTION 9.03. Revocation and Effect of Consent. Until an amendment
or waiver becomes effective, a consent to it by a Holder is a continuing consent
by the Holder and every subsequent Holder of a Security or portion of a Security
that evidences the same debt as the Security of the consenting Holder, even if
notation of the consent is not made on any Security. However, any such Holder or
subsequent Holder may revoke the consent as to its Security or portion of its
Security. Such revocation shall be effective only if the Trustee receives the
notice of revocation before the date the amendment, supplement or waiver becomes
effective. An amendment, supplement or waiver shall become effective on receipt
by the Trustee of written consents from the Holders of the requisite percentage
in principal amount of the outstanding Securities.

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

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

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

            SECTION 9.05. Trustee to Sign Amendments, Etc. The Trustee shall be
entitled to receive, and shall be fully protected in relying upon, an Opinion of
Counsel stating that the execution of any amendment, supplement or waiver
authorized pursuant to this Article Nine is authorized or permitted by this
Indenture. Subject to the preceding sentence, the Trustee shall sign such
amendment, supplement or waiver if the same does not adversely affect the rights
of the Trustee. The Trustee may, but shall not be obligated to, execute any such
amendment,
<PAGE>
                                       68


supplement or waiver that affects the Trustee's own rights, duties or immunities
under this Indenture or otherwise.

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

                                  ARTICLE TEN
                           EQUIPMENT NOTE GUARANTEE

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

            The Guarantor waives presentation to, demand of, payment from and
protest to the Company of any of the Guaranteed Obligations and also waives
notice of protest for nonpayment. The Guarantor waives notice of any default
under the Securities or the Guaranteed Obligations. The obligations of the
Guarantor hereunder shall not be affected by (a) the failure of any Holder or
the Trustee to assert any claim or demand or to enforce any right or remedy
against the Company or any other Person under this Indenture, the Securities or
any other agreement or otherwise; (b) any extension or renewal of any thereof;
(c) any rescission, waiver, amendment or modification of any of the terms or
provisions of this Indenture, the Securities or any other agreement; (d) the
release of any security held by any Holder or the Trustee for the Guaranteed
Obligations or any of them; (e) the failure of any Holder or the Trustee to
exercise any right or remedy against any other guarantor of the Guaranteed
Obligations; or (f) any change in the ownership of the Guarantor.

            The Guarantor further agrees that its Guarantee herein constitutes a
guarantee of payment, performance and compliance when due (and not a guarantee
of collection) and waives any right to require that any resort be had by any
Holder or the Trustee to any security held for payment of the Guaranteed
Obligations.
<PAGE>
                                       69


            Except as expressly set forth in Sections 8.02 and 8.03, the
obligations of the Guarantor hereunder shall not be subject to any reduction,
limitation, impairment or termination for any reason, including any claim of
waiver, release, surrender, alteration or compromise, and shall not be subject
to any defense of setoff, counterclaim, recoupment or termination whatsoever or
by reason of the invalidity, illegality or unenforceability of the Guaranteed
Obligations or otherwise. Without limiting the generality of the foregoing, the
obligations of the Guarantor herein shall not be discharged or impaired or
otherwise affected by the failure of any Holder or the Trustee to assert any
claim or demand or to enforce any remedy under this Indenture, the Securities or
any other agreement, by any waiver or modification of any thereof, by any
default, failure or delay, willful or otherwise, in the performance of the
obligations, or by any other act or thing or omission or delay to do any other
act or thing which may or might in any manner or to any extent vary the risk of
the Guarantor or would otherwise operate as a discharge of the Guarantor as a
matter of law or equity.

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

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

            The Guarantor agrees that it shall not be entitled to any right of
subrogation in respect of any Guaranteed Obligations guaranteed hereby until
payment in full of all Guaranteed Obligations. The Guarantor further agrees
that, as between it, on the one hand, and the Holders and the Trustee, on the
other hand, (x) the maturity of the Guaranteed Obligations guaranteed hereby may
be accelerated as provided in Article Six for the purposes of the Guarantor's
Guarantee herein, notwithstanding any stay, injunction or other prohibition
preventing such acceleration in respect of the Guaranteed Obligations guaranteed
hereby, and (y) in the event of any declaration of acceleration of such
obligations as provided in Article Six, such Guaranteed Obligations (whether or
not due and payable) shall forthwith become due and payable by the Guarantor for
the purposes of this Section.
<PAGE>
                                       70


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

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

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

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

                                ARTICLE ELEVEN
                              SECURITY DOCUMENTS

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

            (b) Each Holder, by accepting a Security, authorizes the Collateral
Agent to execute and deliver the Security Documents, agrees to all of the terms
and provisions of the Security Documents, as the same may be amended from time
to time pursuant to the provisions
<PAGE>
                                       71


of the Security Documents and this Indenture, and authorizes and directs the
Collateral Agent to perform its obligations and exercise its rights under the
Security Documents in accordance therewith; provided, however, that if any
provisions of the Security Documents limit, qualify or conflict with the duties
imposed by the provisions of the TIA, the TIA will control.

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

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

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

            (i) promptly after the execution and delivery of this Indenture, an
      Opinion of Counsel either stating that in the opinion of such counsel this
      Indenture and the Security Documents (including financing statements or
      other instruments) grant to the Secured Parties a security interest in the
      Collateral to the extent described herein and therein and that filings
      have been made in each of the fifty states of the United States to record
      the existence of such security interest or stating that in the opinion of
      such counsel no such action is necessary to make such security interest
      effective; and
<PAGE>
                                       72


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

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

                                ARTICLE TWELVE
                                 MISCELLANEOUS

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

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

            if to the Company:

                  WinStar Equipment Corp.
                  230 Park Avenue
                  New York, New York  10169
                  Attention:  General Counsel

            if to the Guarantor (or WCI):

                  Winstar Communications, Inc.
                  230 Park Avenue
                  New York, New York 10169
                  Attention: Chief Financial Officer
<PAGE>
                                       73


            if to the Trustee:

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

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

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

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

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

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

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

            (i) an Officers' Certificate stating that, in the opinion of the
      signers, all conditions precedent, if any, provided for in this Indenture
      relating to the proposed action have been complied with; and
<PAGE>
                                       74


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

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

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

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

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

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

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

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

            SECTION 12.07. Governing Law. This Indenture and the Securities
shall be governed by the laws of the State of New York, excluding (to the extent
permissible by law) any
<PAGE>
                                       75


rule of law that would cause the application of the laws of any jurisdiction
other than the State of New York.

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

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

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

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

            SECTION 12.12. Separability. In case any provision in this Indenture
or in the Securities shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

            SECTION 12.13. Table of Contents, Headings, Etc. The Table of
Contents, Cross-Reference Table and headings of the Articles and Sections of
this Indenture have been inserted for convenience of reference only, are not to
be considered a part hereof and shall in no way modify or restrict any of the
terms and provisions hereof.
<PAGE>
                                       76


                                  SIGNATURES

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


                                 WINSTAR EQUIPMENT CORP.,
                                  as Issuer


                                 By:______________________________
                                    Name:
                                    Title:


                                 WINSTAR COMMUNICATIONS, INC.,
                                  as Guarantor


                                 By:______________________________
                                    Name:
                                    Title:


                                 UNITED STATES TRUST COMPANY OF 
                                  NEW YORK, as Trustee


                                 By:______________________________
                                    Name:
                                    Title:
<PAGE>

                                     A-1


                                                                     EXHIBIT A

               [FACE OF EXCHANGE NOTE OR PRIVATE EXCHANGE NOTE]

(1)
(2)
                            WINSTAR EQUIPMENT CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

                                                               CUSIP _________
No. R-                                                              $_________

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

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

                                     A-2


            WINSTAR EQUIPMENT CORP., a Delaware corporation (the "Company",
which term includes any successor under the Indenture hereinafter referred to),
for value received, promises to pay to __________ , or its registered assigns,
the principal sum of ___________________ ($__________) on March 1, 2004.

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

            Regular Record Dates: March 1 and September 1.

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

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

                                 WINSTAR EQUIPMENT CORP.


                                 By:______________________________
                                    Name:
                                    Title:

               (Form of Trustee's Certificate of Authentication)

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

Date:  March 18, 1997            UNITED STATES TRUST COMPANY OF NEW
                                 YORK, as Trustee


                                 By:______________________________
                                    Authorized Signatory
<PAGE>

                                     A-3


            [REVERSE SIDE OF EXCHANGE NOTE OR PRIVATE EXCHANGE NOTE]

                             WINSTAR EQUIPMENT CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

1.  Principal and Interest.

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

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

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

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

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

2. Method of Payment.

      The Company will pay principal as provided above and interest (except
defaulted interest) on the principal amount of the Notes as provided above on
each March 15 and September 15 to the persons who are Holders (as reflected in
the Security Register at the close of business on the March 1 and September 1
immediately preceding the relevant Interest Payment Date), in each case, even if
the Note is cancelled on registration of transfer or registration of exchange
after such record date; provided, however, that, with respect to the payment of
principal, the
<PAGE>

                                     A-4


Company will not make payment to the Holder unless this Note is surrendered to a
Paying Agent.

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

3. Paying Agent and Registrar.

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

4. Indenture.

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

            The Notes are secured senior indebtedness of the Company. The
Indenture limits the original aggregate principal amount of the Notes to
$200,000,000 (subject to Section 2.07 of the Indenture).
<PAGE>

                                     A-5


5. Optional Redemption.

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

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

6. Mandatory Redemption.

            In the event that by March 18, 1999, the Company shall not have
applied at least $200.0 million to fund the Acquisition Costs of Designated
Equipment pursuant to the Indenture ($200.0 million less the amount so applied
being herein called the "Unused Equipment Amount"), the Company shall redeem
Notes in an aggregate principal amount equal to the Unused Equipment Amount at a
Redemption Price of 112.5% of such principal amount, plus accrued and unpaid
interest thereon to the Redemption Date (subject to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to receive interest due on the relevant Interest Payment Date). The
mandatory redemption shall occur no later than April 2, 1999.

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

                                     A-6


7. Notice of Redemption.

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

8. Repurchase upon Change in Control.

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

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

9. Guarantee.

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

10. Collateral and Security Documents.

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

                                     A-7


11. Denominations; Transfer; Exchange.

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

12. Persons Deemed Owners.

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

13. Unclaimed Money.

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

14. Discharge Prior to Redemption or Maturity.

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

15. Amendment; Supplement; Waiver.

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

                                     A-8


16. Restrictive Covenants.

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

17. Successor Persons.

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

18. Defaults and Remedies.

            The following events constitute "Events of Default" under the
Indenture: (a) default in the payment of principal of (or premium, if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise; (b) default in the payment of interest on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company or WCI defaults in the performance of or breaches any other covenant
or agreement of the Company or WCI in the Indenture or under the Notes or the
Security Documents and such default or breach continues for a period of 30
consecutive days after written notice by the Trustee or the Holders of 25% or
more in aggregate principal amount of the Notes; (d) there occurs with respect
to any issue or issues of Indebtedness of WCI or any Significant Subsidiary
having an outstanding principal amount of $25,000,000 or more in the aggregate
for all such issues of all such Persons, whether such Indebtedness now exists or
shall hereafter be created, (i) an event of default that has caused the holder
thereof to declare such Indebtedness to be due and payable prior to its Stated
Maturity and such Indebtedness has not been discharged in full or such
acceleration has not been rescinded or annulled within 30 days of such
acceleration and/or (ii) the failure to make a principal payment at the final
(but not any interim) fixed maturity and such defaulted payment shall not have
been made, waived or extended within 30 days of such payment default; (e) any
final judgment or order (not covered by insurance) for the payment of money in
excess of $25,000,000 in the aggregate for all such
<PAGE>

                                     A-9


final judgments or orders against all such Persons (treating any deductibles,
self-insurance or retention as not so covered) shall be rendered against WCI or
any Significant Subsidiary and shall not be paid or discharged, and there shall
be any period of 60 consecutive days following entry of the final judgment or
order that causes the aggregate amount for all such final judgments or orders
outstanding and not paid or discharged against all such Persons to exceed
$25,000,000 during which a stay of enforcement of such final judgment or order,
by reason of a pending appeal or otherwise, shall not be in effect; (f) a court
having jurisdiction in the premises enters a decree or order for (i) relief in
respect of WCI or any Significant Subsidiary in an involuntary case under any
applicable bankruptcy, insolvency or other similar law now or hereafter in
effect, (ii) appointment of a receiver, liquidator, assignee, custodian,
trustee, sequestrator or similar official of WCI or any Significant Subsidiary
or for all or substantially all of the property and assets of WCI or any
Significant Subsidiary or (iii) the winding up or liquidation of the affairs of
WCI or any Significant Subsidiary and, in each case, such decree or order shall
remain unstayed and in effect for a period of 60 consecutive days; or (g) WCI or
any Significant Subsidiary (i) commences a voluntary case under any applicable
bankruptcy, insolvency or other similar law now or hereafter in effect, or
consents to the entry of an order for relief in an involuntary case under any
such law, (ii) consents to the appointment of or taking possession by a
receiver, liquidator, assignee, custodian, trustee, sequestrator or similar
official of WCI or any Significant Subsidiary or for all or substantially all of
the property and assets of WCI or any Significant Subsidiary or (iii) effects
any general assignment for the benefit of creditors; (h) any of the provisions
of the Indenture relating to the Security Documents or the Security Documents
shall cease to be in full force and effect or shall cease to give the secured
parties the Liens, rights, power and privileges purported to be created thereby;
or (i) the Equipment Note Guarantee shall cease to be in full force and effect
(other than in accordance with its terms) or the Guarantor shall deny or
disaffirm its obligations under the Equipment Note Guarantee.

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

                                     A-10


19. Trustee Dealings with Company.

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

20. No Recourse Against Others.

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

21. Authentication.

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

22. Holders' Compliance with Registration Rights Agreement.

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

23. Abbreviations.

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

24. Governing Law.

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

                                     A-11


            The Company will furnish to any Holder upon written request and
without charge a copy of the Indenture. Requests may be made to WinStar
Equipment Corp., 230 Park Avenue, Suite 3126, New York, NY 10169, Attention:
General Counsel.
<PAGE>

                                     A-12


                                 ASSIGNMENT FORM


I or we assign and transfer this Note to:

Please insert social security or other identifying number of assignee
_________________________________________________
_________________________________________________

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

The agent may substitute another to act for him.

Dated ___________   Signed ________________


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

Signature Guarantee __________________________ (3)

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

                                     A-13


                      OPTION OF HOLDER TO ELECT PURCHASE


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

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

Date:_______________________________

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

Signature Guarantee:______________________________(4)

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

                                     AP-1


                                                 RULE 144A/REGULATION S APPENDIX

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

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

      1. Definitions

      1.1 Definitions

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

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

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

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

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

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

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

                                     AP-2


            "Private Exchange" means the offer by the Company, pursuant to the
Registration Rights Agreement, to the Initial Purchasers to issue and deliver to
each Initial Purchaser, in exchange for the Initial Securities held by the
Initial Purchaser as part of its initial distribution, a like aggregate
principal amount of Private Exchange Securities.

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

            "Purchase Agreement" means the Purchase Agreement dated March 13,
1997, among the Company and the Initial Purchasers.

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

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

            "Registration Rights Agreement" means the Registration Rights
Agreement dated March 18, 1997, among the Company, the Guarantor and the Initial
Purchasers.

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

            "Securities Act" means the Securities Act of 1933.

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

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

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

                                   AP-3


      1.2  Other Definitions

                                                              Defined in
            Term                                               Section:
            ----                                              ----------

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

      2. The Securities.

      2.1  Form and Dating.

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

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

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

            The Company shall execute and the Trustee shall, in accordance with
this Section 2.1(b), authenticate and deliver initially one or more Global
Securities that (a) shall be registered in the name of the Depositary for such
Global Security or Global Securities or the nominee of such Depositary and (b)
shall be delivered by the Trustee to such Depositary 
<PAGE>

                                   AP-4


or pursuant to such Depositary's instructions or held by the Trustee as
custodian for the Depositary.

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

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

      2.2 Authentication. The Trustee shall authenticate and deliver: (1)
Initial Securities for original issue in an aggregate principal amount of
$200,000,000 and (2) Exchange Securities or Private Exchange Securities for
issue only in a Registered Exchange Offer or a Private Exchange, respectively,
pursuant to the Registration Rights Agreement, for a like principal amount of
Initial Securities, in each case upon a written order of the Company signed by
two Officers or by an Officer and either an Assistant Treasurer or an Assistant
Secretary of the Company. Such order shall specify the amount of the Securities
to be authenticated and the date on which the original issue of Securities is to
be authenticated and whether the Securities are to be Initial Securities,
Exchange Securities or Private Exchange Securities. The aggregate principal
amount of Securities outstanding at any time may not exceed $200,000,000 except
as provided in Section 2.07 of this Indenture.

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

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

                                   AP-5


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

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

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

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

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

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

                  (C) if such Definitive Securities are being transferred (w)
            pursuant to an exemption from registration in accordance with Rule
            144; or (x) in reliance on another exemption from the registration
            requirements of the Securities Act: (i) a certification to that
            effect (in the form set forth on the reverse of the Security) and
            (ii) if the Company or Registrar so requests, an opinion of counsel
            or other evidence reasonably satisfactory to them as to the
            compliance with the restrictions set forth in the legend set forth
            in Section 2.3(d)(i).

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

            (i) certification, in the form set forth on the reverse of the
      Security, that such Definitive Security is being transferred (A) to a QIB
      in accordance with Rule 144A, 
<PAGE>

                                   AP-6

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

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

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

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

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

         (iii) In the event that a Global Security is exchanged for Securities
      in definitive registered form pursuant to Section 2.4 or Section 2.09 of
      the Indenture prior to the 
<PAGE>

                                   AP-7

      consummation of a Registered Exchange Offer or the effectiveness of a
      Shelf Registration Statement with respect to such Securities, such
      Securities may be exchanged only in accordance with such procedures as are
      substantially consistent with the provisions of this Section 2.3
      (including the certification requirements set forth on the reverse of the
      Initial Securities intended to ensure that such transfers comply with Rule
      144A or Regulation S, as the case may be) and such other procedures as may
      from time to time be adopted by the Company.

            (d) Legends.

            (i) Except as permitted by the following paragraphs (ii), (iii) and
      (iv), each Security certificate evidencing the Global Securities and the
      Definitive Securities (and all Securities issued in exchange therefor or
      in substitution thereof) shall bear a legend in substantially the
      following form:

            "THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
            TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES
            SECURITIES ACT OF 1933 (THE "SECURITIES ACT"), AND THIS SECURITY MAY
            NOT BE OFFERED, SOLD, OR OTHERWISE TRANSFERRED IN THE ABSENCE OF
            SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH
            PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF
            THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF
            SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

            THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY
            THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE
            TRANSFERRED ONLY (i) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES
            IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER
            THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF
            RULE 144A, (ii) IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE
            904 UNDER THE SECURITIES ACT, (iii) PURSUANT TO AN EXEMPTION FROM
            REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144
            THEREUNDER (IF AVAILABLE), (iv) TO THE ISSUER, OR (v) PURSUANT TO AN
            EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH
            OF CASES (i) THROUGH (v) IN ACCORDANCE WITH ANY APPLICABLE
            SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE
            HOLDER WILL, 
<PAGE>

                                   AP-8


            AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF
            THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A)
            ABOVE.

            Each Definitive Security will also bear the following additional
legend:

            "IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE
            REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION
            AS SUCH TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE
            TRANSFER COMPLIES WITH THE FOREGOING RESTRICTIONS."

            (ii) Upon any sale or transfer of a Transfer Restricted Security
      (including any Transfer Restricted Security represented by a Global
      Security) pursuant to Rule 144 under the Securities Act:

                  (A) in the case of any Transfer Restricted Security that is a
            Definitive Security, the Registrar shall permit the Holder thereof
            to exchange such Transfer Restricted Security for a certificated
            Security that does not bear the legend set forth above and rescind
            any restriction on the transfer of such Transfer Restricted
            Security; and

                  (B) in the case of any Transfer Restricted Security that is
            represented by a Global Security, the Registrar shall permit the
            Holder thereof to exchange such Transfer Restricted Security for a
            certificated Security that does not bear the legend set forth above
            and rescind any restriction on the transfer of such Transfer
            Restricted Security, if the Holder certifies in writing to the
            Registrar that its request for such exchange was made in reliance on
            Rule 144 (such certification to be in the form set forth on the
            reverse of the Security).

         (iii) After a transfer of any Initial Securities or Private Exchange
      Securities during the period of the effectiveness of a Shelf Registration
      Statement with respect to such Initial Securities or Private Exchange
      Securities, as the case may be, all requirements pertaining to legends on
      such Initial Security or such Private Exchange Security will cease to
      apply, the requirements requiring any such Initial Security or such
      Private Exchange Security issued to certain Holders to be issued in global
      form will cease to apply, and a certificated Initial Security or Private
      Exchange Security without legends will be available to the transferee of
      the Holder of such Initial Securities or Private Exchange Securities upon
      exchange of such transferring Holder's 
<PAGE>

                                   AP-9

      certificated Initial Security or Private Exchange Security or directions
      to transfer such Holder's interest in the Global Security, as applicable.

            (iv) Upon the consummation of a Registered Exchange Offer with
      respect to the Initial Securities pursuant to which Holders of such
      Initial Securities are offered Exchange Securities in exchange for their
      Initial Securities, all requirements pertaining to such Initial Securities
      that Initial Securities issued to certain Holders be issued in global form
      will cease to apply and certificated Initial Securities with the
      Restricted Securities Legend set forth in Exhibit 1 hereto will be
      available to Holders of such Initial Securities that do not exchange their
      Initial Securities, and Exchange Securities in certificated or global form
      will be available to Holders that exchange such Initial Securities in such
      Registered Exchange Offer.

            (v) Upon the consummation of a Private Exchange with respect to the
      Initial Securities pursuant to which Holders of such Initial Securities
      are offered Private Exchange Securities in exchange for their Initial
      Securities, all requirements pertaining to such Initial Securities that
      Initial Securities issued to certain Holders be issued in global form will
      still apply, and Private Exchange Securities in global form with the
      Restricted Securities Legend set forth in Exhibit 1 hereto will be
      available to Holders that exchange such Initial Securities in such Private
      Exchange.

            (e) Cancellation or Adjustment of Global Security. At such time as
all beneficial interests in a Global Security have either been exchanged for
certificated or Definitive Securities, redeemed, repurchased or canceled, such
Global Security shall be returned to the Depositary for cancellation or retained
and canceled by the Trustee. At any time prior to such cancellation, if any
beneficial interest in a Global Security is exchanged for certificated or
Definitive Securities, redeemed, repurchased or canceled, the principal amount
at maturity of Securities represented by such Global Security shall be reduced
and an adjustment shall be made on the books and records of the Trustee (if it
is then the Securities Custodian for such Global Security) with respect to such
Global Security, by the Trustee or the Securities Custodian, to reflect such
reduction.

            (f) Obligations with Respect to Transfers and Exchanges of
      Securities.

            (i) To permit registrations of transfers and exchanges, the Company
      shall execute and the Trustee shall authenticate certificated Securities,
      Definitive Securities and Global Securities at the Registrar's or
      co-registrar's request.

          (ii) No service charge shall be made for any registration of transfer
      or exchange, but the Company may require payment of a sum sufficient to
      cover any transfer tax, assessments or similar governmental charge payable
      in connection 
<PAGE>

                                   AP-10

      therewith (other than any such transfer taxes, assessments or similar
      governmental charge payable upon exchange or transfer pursuant to Sections
      3.08, 4.11, 4.12 and 9.04 of the Indenture).

         (iii) The Registrar or co-registrar shall not be required to register
      the transfer of or exchange of (a) any certificated or Definitive Security
      selected for redemption in whole or in part pursuant to Article Three of
      this Indenture, except the unredeemed portion of any certificated or
      Definitive Security being redeemed in part, or (b) any Security for a
      period beginning 15 Business Days before the mailing of a notice of an
      offer to repurchase or redeem Securities or 15 Business Days before an
      interest payment date.

          (iv) Prior to the due presentation for registration of transfer of any
      Security, the Company, the Trustee, the Paying Agent, the Registrar or any
      co-registrar may deem and treat the person in whose name a Security is
      registered as the absolute owner of such Security for the purpose of
      receiving payment of principal of and interest on such Security and for
      all other purposes whatsoever, whether or not such Security is overdue,
      and none of the Company, the Trustee, the Paying Agent, the Registrar or
      any co-registrar shall be affected by notice to the contrary.

            (v) All Securities issued upon any transfer or exchange pursuant to
      the terms of this Indenture shall evidence the same debt and shall be
      entitled to the same benefits under this Indenture as the Securities
      surrendered upon such transfer or exchange.

            (g)  No Obligation of the Trustee.

            (i) The Trustee shall have no responsibility or obligation to any
      beneficial owner of a Global Security, a member of or a participant in the
      Depositary or other Person with respect to the accuracy of the records of
      the Depositary or its nominee or of any participant or member thereof with
      respect to any ownership interest in the Securities or with respect to the
      delivery to any participant, member, beneficial owner or other Person
      (other than the Depositary) of any notice (including any notice of
      redemption) or the payment of any amount under or with respect to such
      Securities. All notices and communications to be given to the Holders and
      all payments to be made to Holders under the Securities shall be given or
      made only to or upon the order of the registered Holders (which shall be
      the Depositary or its nominee in the case of a Global Security). The
      rights of beneficial owners in any Global Security shall be exercised only
      through the Depositary subject to the applicable rules and procedures of
      the Depositary. The Trustee may rely and shall 
<PAGE>

                                   AP-11


      be fully protected in relying upon information furnished by the Depositary
      with respect to its members, participants and any beneficial owners.

            (ii) The Trustee shall have no obligation or duty to monitor,
      determine or inquire as to compliance with any restrictions on transfer
      imposed under this Inden- ture or under applicable law with respect to any
      transfer of any interest in any Security (including any transfers between
      or among Depositary participants, members or beneficial owners in any
      Global Security) other than to require delivery of such certificates and
      other documentation or evidence as are expressly required by, and to do so
      if and when expressly required by, the terms of this Indenture, and to
      examine the same to determine substantial compliance as to form with the
      express requirements hereof.

      2.4 Certificated Securities.

            (a) A Global Security deposited with the Depositary or with the
Trustee as custodian for the Depositary pursuant to Section 2.1 shall be
transferred to the beneficial owners thereof in the form of certificated
Securities in an aggregate principal amount equal to the principal amount of
such Global Security, in exchange for such Global Security, only if such
transfer complies with Section 2.3 and (i) the Depositary notifies the Company
that it is unwilling or unable to continue as Depositary for such Global
Security or if at any time such Depositary ceases to be a "clearing agency"
registered under the Exchange Act and a successor depositary is not appointed by
the Company within 90 days of such notice, or (ii) an Event of Default has
occurred and is continuing or (iii) the Company, in its sole discretion,
notifies the Trustee in writing that it elects to cause the issuance of
certificated Securities under this Indenture.

            (b) Any Global Security that is transferable to the beneficial
owners thereof pursuant to this Section shall be surrendered by the Depositary
to the Trustee located in the Borough of Manhattan, The City of New York, to be
so transferred, in whole or from time to time in part, without charge, and the
Trustee shall authenticate and deliver, upon such transfer of each portion of
such Global Security, an equal aggregate principal amount of certificated
Initial Securities of authorized denominations. Any portion of a Global Security
transferred pursuant to this Section shall be executed, authenticated and
delivered only in denominations of $1,000 principal amount and any integral
multiple thereof and registered in such names as the Depositary shall direct.
Any certificated Initial Security delivered in exchange for an interest in the
Global Security shall, except as otherwise provided by Section 2.3(d), bear the
Restricted Securities Legend set forth in Exhibit 1 hereto.

            (c) Subject to the provisions of Section 2.4(b), the registered
Holder of a Global Security may grant proxies and otherwise authorize any
Person, including Agent 
<PAGE>

                                   AP-12


Members and Persons that may hold interests through Agent Members, to take any
action which a Holder is entitled to take under this Indenture or the
Securities.

            (d) In the event of the occurrence of either of the events specified
in Section 2.4(a), the Company will promptly make available to the Trustee a
reasonable supply of certificated Securities in definitive, fully registered
form without interest coupons.
<PAGE>

                                    E-1


                                                                       EXHIBIT I
                                                                              to
                                                 Rule 144A/REGULATION S APPENDIX

                             [FACE OF INITIAL NOTE]

                           [Global Securities Legend]

            UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE COMPANY
(AS DEFINED BELOW) OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

            UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES
IN DEFINITIVE REGISTERED FORM, THIS CERTIFICATE MAY NOT BE TRANSFERRED EXCEPT AS
A WHOLE BY DTC TO A NOMINEE OF DTC OR BY A NOMINEE OF DTC TO DTC OR ANOTHER
NOMINEE OF DTC OR BY DTC OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A
NOMINEE OF SUCH SUCCESSOR DEPOSITARY.

            THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF
1933 (THE "SECURITIES ACT"), AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR
OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE
EXEMPTION THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE
SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF
SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

            THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY
THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED
ONLY (i) TO A PERSON WHOM THE
<PAGE>

                                    E-2


SELLER REASONABLY BELIEVES IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED IN
RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF
RULE 144A, (ii) IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE
SECURITIES ACT, (iii) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE
SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE), (iv) TO THE
ISSUER, OR (v) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT, IN EACH OF CASES (i) THROUGH (v) IN ACCORDANCE WITH ANY
APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER
WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY PURCHASER OF THIS
SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

            IN CONNECTION WITH ANY TRANSFER, THE HOLDER WILL DELIVER TO THE
REGISTRAR AND TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AS SUCH
TRANSFER AGENT MAY REASONABLY REQUIRE TO CONFIRM THAT THE TRANSFER COMPLIES WITH
THE FOREGOING RESTRICTIONS.
<PAGE>

                                    E-3


                          WINSTAR EQUIPMENT CORP.

               12 1/2% Guaranteed Senior Secured Note Due 2004

                                                               CUSIP 975516 AA 3
No. QIB-                                                       $________________
<PAGE>

                                    E-4


            WINSTAR EQUIPMENT CORP., a Delaware corporation (the "Company",
which term includes any successor under the Indenture hereinafter referred to),
for value received, promises to pay to __________ , or its registered assigns,
the principal sum of ____________ ($_____) on March 15, 2004.

            Interest Payment Dates: March 15 and September 15, commencing
September 15, 1997.

            Regular Record Dates: March 1 and September 1.

            Reference is hereby made to the further provisions of this Note set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

      IN WITNESS WHEREOF, the Company has caused this Note to be signed manually
or by facsimile by its duly authorized officer.

                             WINSTAR EQUIPMENT CORP.


                             By:_________________________________
                                Name:
                                Title:

             (Form of Trustee's Certificate of Authentication)

This is one of the 12 1/2% Guaranteed Senior Secured Notes Due 2004 described in
the within-mentioned Indenture.


Date: March 18, 1997         UNITED STATES TRUST COMPANY
                             OF NEW YORK, as Trustee


                             By:_________________________________
                                   Authorized Signatory
<PAGE>

                                    E-5


                          [REVERSE SIDE OF NOTE]

                          WINSTAR EQUIPMENT CORP.

               12 1/2% Guaranteed Senior Secured Note Due 2004

1.  Principal and Interest.

            The Company will pay the principal of this Note on March 15, 2004.

            The Company promises to pay interest on the principal amount of this
Note on each Interest Payment Date, as set forth below, at the rate per annum
shown above.

            Interest will be payable semiannually (to the holders of record of
the Notes at the close of business on the March 1 and September 1 immediately
preceding the relevant Interest Payment Date) on each Interest Payment Date,
commencing September 15, 1997.

            Interest on the Notes will accrue from the most recent Interest
Payment Date; provided, however, that, if there is no existing default in the
payment of interest and this Note is authenticated between a Regular Record Date
referred to on the face hereof and the next succeeding Interest Payment Date,
interest shall accrue from such Interest Payment Date. Interest will be computed
on the basis of a 360-day year of twelve 30-day months. Notwithstanding the
above, (i) if a Registration Default (as defined in the Registration Rights
Agreement) occurs, additional interest will accrue on this Note at a rate of
0.50% per annum from and including the date on which any such Registration
Default shall occur to but excluding the earlier of (x) the date on which all
Registration Defaults have been cured and (y) the date on which all Notes become
freely transferable by Holders other than Affiliates of the Company without
further registration under the Securities Act.

            The Company shall pay interest on overdue principal and premium, if
any, and (to the extent lawful) interest on overdue installments of interest.

2.  Method of Payment.

      The Company will pay principal as provided above and interest (except
defaulted interest) on the principal amount of the Notes as provided above on
each March 15 and September 15 to the persons who are Holders (as reflected in
the Security Register at the close of business on the March 1 and September 1
immediately preceding the relevant Interest Payment Date), in each case, even if
the Note is cancelled on registration of transfer or registration of exchange
after such record date; provided, however, that, with respect to the payment of
principal, the Company will not make payment to the Holder unless this Note is
surrendered to a Paying Agent.

      The Company will pay principal and interest in money of the United States
that at the time of payment is legal tender for payment of public and private
debts. Payments in respect
<PAGE>

                                    E-6


of the Notes represented by a global Note (including principal, premium and
interest) will be made by wire transfer of immediately available funds to the
accounts specified by The Depository Trust Company. The Company will make all
payments in respect of a certificated Note (including principal, premium and
interest) by mailing a check to the registered address of each Holder thereof;
provided, however, that payments on a certificated Note will be made by wire
transfer to a U.S. dollar account maintained by the payee with a bank in the
United States if such Holder elects payment by wire transfer by giving written
notice to the Trustee or the Paying Agent to such effect designating such
account no later than 30 days immediately preceding the relevant due date for
payment (or such other date as the trustee may accept in its discretion).

3. Paying Agent and Registrar.

            Initially, United States Trust Company of New York (the "Trustee")
will act as authenticating agent, Paying Agent and Registrar. The Company may
change any authenticating agent, Paying Agent or Registrar without notice. The
Company, any Subsidiary or any Affiliate of any of them may act as Paying Agent,
Registrar or coRegistrar.

4. Indenture.

            The Company issued the Notes under an Indenture dated as of March
1,1997 (the "Indenture"), among the Company, WinStar Communications, Inc., as
guarantor (the "Guarantor") and the Trustee. Capitalized terms herein are used
as defined in the Indenture unless otherwise indicated. The terms of the Notes
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act. The Notes are subject to all such terms,
and Holders are referred to the Indenture and the Trust Indenture Act for a
statement of all such terms. To the extent permitted by applicable law, in the
event of any inconsistency between the terms of this Note and the terms of the
Indenture, the terms of the Indenture shall control.

            The Notes are secured senior indebtedness of the Company. The
Indenture limits the original aggregate principal amount of the Notes to
$200,000,000 (subject to Section 2.07 of the Indenture).

5. Optional Redemption.

            The Notes will not be redeemable prior to March 15, 2002.
Thereafter, the Notes will be redeemable, at the Company's option, in whole at
any time or in part from time to time on or after March 15, 2002 and prior to
maturity, upon not less than 30 nor more than 60 days' prior notice mailed by
first-class mail to each Holders' last address as
<PAGE>

                                    E-7


it appears in the Security Register, at the following Redemption Prices
(expressed as a percentage of the principal amount of the Notes, plus accrued
and unpaid interest, if any, on such amount to the Redemption Date (subject to
the right of Holders of record on the relevant Regular Record Date that is on or
prior to the Redemption Date to receive interest due on the relevant Interest
Payment Date if redeemed during the 12-month period commencing on March 15 of
the years set forth below:

                  Year                       Redemption Price
                  ----                       ----------------
                  2002                            106.250%
                  2003 and thereafter             103.125%

6. Mandatory Redemption.

            In the event that by March 18, 1999, the Company shall not have
applied at least $200.0 million to fund the Acquisition Costs of Designated
Equipment pursuant to the Indenture ($200.0 million less the amount so applied
being herein called the "Unused Equipment Amount"), the Company shall redeem
Notes in an aggregate principal amount equal to the Unused Equipment Amount at a
redemption price of 112.5% of such principal amount, plus accrued and unpaid
interest thereon to the Redemption Date (subject to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to receive interest due on the relevant Interest Payment Date). The
mandatory redemption shall occur no later than April 2, 1999.

            Selection of the Notes for mandatory redemption will be made on a
pro rata basis; provided, however, that no Note of $1,000 in principal amount or
less shall be redeemed in part. If any Notes are to be redeemed in part only, a
new Note in principal amount equal to the unredeemed portion thereof will be
issued in the name of the Holder thereof upon cancellation of the original Note.

7. Notice of Redemption.

            Notice of any optional redemption will be mailed by the Company at
least 30 days but not more than 60 days before a Redemption Date, and notice of
a mandatory redemption will be mailed by the Company at least 10 Business Days
but not more than 15 Business Days before a Redemption Date, in each case, to
each Holder of Notes to be redeemed at his last address as it appears in the
Security Register. Notes in original denominations larger than $1,000 may be
redeemed in part; provided, however, that Notes will only be issued in
denominations of $1,000 principal amount or integral multiples thereof. On and
after the Redemption Date, interest ceases to accrue on Notes (or portions of
Notes) called for redemption, unless the Company defaults in the payment of the
Redemption Price.
<PAGE>

                                    E-8


8. Repurchase upon Change in Control.

      Upon the occurrence of a Change of Control, each Holder shall have the
right to require the repurchase of its Notes by the Company in cash pursuant to
the offer described in the Indenture at a purchase price equal to 101% of the
principal amount of such Notes on such date of purchase, plus accrued and unpaid
interest,if any, on such amount to the date of purchase (the "Change of Control
Payment").

      A notice of such Change of Control will be mailed within 30 days after any
Change of Control occurs to each Holder at his last address as it appears in the
Security Register. Notes in original denominations larger than $1,000 may be
sold to the Company in part; provided, however, that Notes will only be issued
in denominations of $1,000 principal amount at maturity or integral multiples
thereof. On and after the Change of Control Payment Date, interest ceases to
accrue on Notes or portions of Notes surrendered for purchase by the Company,
unless the Company defaults in the payment of the Change of Control Payment.

9. Guarantee.

      The Notes are guaranteed on a senior unsubordinated basis by the Guarantor
to the extent provided in the Indenture.

10. Collateral and Security Documents.

      To secure the due and punctual payment of the principal of, premium if
any, and interest on the Notes and all other amounts payable by the Company
under the Indenture and the Notes when and as the same shall be due and payable,
whether at maturity, by acceleration or otherwise, the Grantor has granted
security interests in the Collateral to the Collateral Agent for the benefit of
the Holders of Notes pursuant to the Security Documents.

11. Denominations; Transfer; Exchange.

            The Notes are in registered form without coupons in denominations of
$1,000 of principal amount and integral multiples thereof. A Holder may register
the transfer or exchange of Notes in accordance with the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and to pay any taxes and fees required by
law or permitted by the Indenture. The Registrar need not register the transfer
or exchange of any Notes selected for redemption. Also, it need not register the
transfer or exchange of any Notes for a period of 15 days before a selection of
Notes to be redeemed is made.
<PAGE>

                                    E-9


12. Persons Deemed Owners.

      A Holder shall be treated as the owner of a Note for all purposes.

13. Unclaimed Money.

      If money for the payment of principal, premium, if any, or interest
remains unclaimed for two years, the Trustee and the Paying Agent will pay the
money back to the Company at its request. After that, Holders entitled to the
money must look to the Company for payment, unless an applicable law designates
another Person, and all liability of the Trustee and such Paying Agent with
respect to such money shall cease.

14. Discharge Prior to Redemption or Maturity.

      Subject to certain conditions, the Company at any time may terminate some
or all of its obligations under the Notes, the Indenture and the Security
Documents, and the Guarantor may terminate its obligations under the Equipment
Note Guarantee, if the Company deposits with the Trustee money or U.S.
Government Obligations for payment of principal and interest on the Notes to
redemption or maturity, as the case may be.

15. Amendment; Supplement; Waiver.

            Subject to certain exceptions, the Indenture or the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Notes then outstanding, and any existing default or
compliance with any provision may be waived with the consent of the Holders of
at least a majority in principal amount of the Notes then outstanding. Without
notice to or the consent of any Holder, the parties thereto may amend or
supplement the Indenture or the Notes to, among other things, cure any
ambiguity, defect or inconsistency and make any change that, in the opinion of
the Board of Directors of the Company, does not materially and adversely affect
the rights of any Holder.

16. Restrictive Covenants.

            The Indenture imposes certain limitations on the ability of the
Guarantor and its Restricted Subsidiaries, among other things, to incur
additional indebtedness; create liens; engage in sale-leaseback transactions;
pay dividends or make distributions in respect of their capital stock; make
investments or make certain other restricted payments; sell assets; issue or
sell stock of Restricted Subsidiaries; enter into transactions with stockholders
or affiliates; or, with respect to the Company, to incur any indebtedness other
than the Notes; engage in any other business activities; apply the gross
proceeds from the sale of the Notes to uses
<PAGE>

                                   E-10


other than the acquisition of Designated Equipment; fail to take action to vest
a security interest in the Designated Equipment in the Trustee; fail to file
proper UCC-1s and UCC-3s; consolidate, merge or sell all or substantially all of
its assets. Within 90 days after the end of the last fiscal quarter of each
year, the Company must report to the Trustee on compliance with such
limitations.

17. Successor Persons.

            Generally, when a successor person or other entity assumes all the
obligations of its predecessor under the Notes and the Indenture, the
predecessor person will be released from those obligations.

18. Defaults and Remedies.

            The following events constitute "Events of Default" under the
Indenture: (a) default in the payment of principal of (or premium, if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise; (b) default in the payment of interest on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company or WCI defaults in the performance of or breaches any other covenant
or agreement of the Company or WCI in the Indenture or under the Notes or the
Security Documents and such default or breach continues for a period of 30
consecutive days after written notice by the Trustee or the Holders of 25% or
more in aggregate principal amount of the Notes; (d) there occurs with respect
to any issue or issues of Indebtedness of WCI or any Significant Subsidiary
having an outstanding principal amount of $25,000,000 or more in the aggregate
for all such issues of all such Persons, whether such Indebtedness now exists or
shall hereafter be created, (i) an event of default that has caused the holder
thereof to declare such Indebtedness to be due and payable prior to its Stated
Maturity and such Indebtedness has not been discharged in full or such
acceleration has not been rescinded or annulled within 30 days of such
acceleration and/or (ii) the failure to make a principal payment at the final
(but not any interim) fixed maturity and such defaulted payment shall not have
been made, waived or extended within 30 days of such payment default; (e) any
final judgment or order (not covered by insurance) for the payment of money in
excess of $25,000,000 in the aggregate for all such final judgments or orders
against all such Persons (treating any deductibles, self-insurance or retention
as not so covered) shall be rendered against WCI or any Significant Subsidiary
and shall not be paid or discharged, and there shall be any period of 60
consecutive days following entry of the final judgment or order that causes the
aggregate amount for all such final judgments or orders outstanding and not paid
or discharged against all such Persons to exceed $25,000,000 during which a stay
of enforcement of such final judgment or order, by reason of a pending appeal or
otherwise, shall not be in effect; (f) a court having jurisdiction in the
premises enters a decree or order for (i) relief in respect of WCI or any
Significant Subsidiary in an
<PAGE>

                                   E-11


involuntary case under any applicable bankruptcy, insolvency or other similar
law now or hereafter in effect, (ii) appointment of a receiver, liquidator,
assignee, custodian, trustee, sequestrator or similar official of WCI or any
Significant Subsidiary or for all or substantially all of the property and
assets of WCI or any Significant Subsidiary or (iii) the winding up or
liquidation of the affairs of WCI or any Significant Subsidiary and, in each
case, such decree or order shall remain unstayed and in effect for a period of
60 consecutive days; (g) WCI or any Significant Subsidiary (i) commences a
voluntary case under any applicable bankruptcy, insolvency or other similar law
now or hereafter in effect, or consents to the entry of an order for relief in
an involuntary case under any such law, (i) consents to the appointment of or
taking possession by a receiver, liquidator, assignee, custodian, trustee,
sequestrator or similar official of WCI or any Significant Subsidiary or for all
or substantially all of the property and assets of WCI or any Significant
Subsidiary or (iii) effects any general assignment for the benefit of creditors;
(h) any of the provisions of the Indenture relating to the Security Documents or
the Security Documents shall cease to be in full force and effect or shall cease
to give the secured parties the Liens, rights, power and privileges purported to
be created thereby; or (i) the Equipment Note Guarantee shall cease to be in
full force and effect (other than in accordance with its terms) or the Guarantor
shall deny or disaffirm its obligations under the Equipment Note Guarantee.

      If an Event of Default (other than an Event of Default specified in clause
(f) or (g) above that occurs with respect to the Company or WCI) occurs and is
continuing under the Indenture, the Trustee or the Holders of at least 25% in
aggregate principal amount of the Notes, then outstanding, by written notice to
the Company (and to the Trustee if such notice is given by the Holders), may,
and the Trustee at the request of such Holders shall, declare the principal of,
premium, if any, and accrued interest, if any, on the Notes to be immediately
due and payable. If a bankruptcy or insolvency default with respect to the
Company or any Restricted Subsidiary occurs and is continuing, the principal
amount of the Notes automatically becomes due and payable. Holders may not
enforce the Indenture or the Notes except as provided in the Indenture. The
Trustee may require indemnity satisfactory to it before it enforces the
Indenture or the Notes. Subject to certain limitations, Holders of at least a
majority in principal amount of the Notes then outstanding may direct the
Trustee in its exercise of any trust or power.

19. Trustee Dealings with Company.

            The Trustee under the Indenture, in its individual or any other
capacity, may make loans to, accept deposits from and perform services for the
Company or its Affiliates and may otherwise deal with the Company or its
Affiliates as if it were not the Trustee.
<PAGE>

                                   E-12


20. No Recourse Against Others.

            No incorporator, stockholder, officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such obligations or their creation provided, however, that the foregoing
shall not affect the Guarantor's obligations with respect to the Equipment Note
Guarantee. Each Holder by accepting a Note waives and releases all such
liability. Such waiver and release are part of the consideration for the
issuance of the Notes.

21. Authentication.

            This Note shall not be valid until the Trustee or authenticating
agent signs the certificate of authentication on the other side of this Note.

22. Holders' Compliance with Registration Rights Agreement.

            Each Holder of a Note, by acceptance hereof, acknowledges and agrees
to the provisions of the Registration Rights Agreement, including, without
limitation, the obligations of the Holders with respect to a registration and
the indemnification of the Company to the extent provided therein.

23. Abbreviations.

      Customary abbreviations may be used in the name of a Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (= joint tenants with right of survivorship and not as
tenants in common), CUST (= Custodian) and U/G/M/A (= Uniform Gifts to Minors
Act).

24. Governing Law.

      The Indenture and the Notes shall be governed by the State of New York,
excluding (to the extent permissible by law) any rule of law that would cause
the application of the laws of any jurisdiction other than the State of New
York.

      The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture. Requests may be made to WinStar Equipment Corp.,
230 Park Avenue, Suite 3126, New York, NY 10169, Attention: General Counsel.
<PAGE>

                                      E-13


                                 ASSIGNMENT FORM

I or we assign and transfer this Note to:

Please insert social security or other identifying number of assignee
_________________________________________________
_________________________________________________

Print or type name, address and zip code of assignee and irrevocably appoint
_____________, as agent, to transfer this Note on the books of the Company.

The agent may substitute another to act for him.

Dated ___________   Signed ________________


_________________________________________________
(Sign exactly as name appears on the other side of this Note)

Signature Guarantee __________________________ (1)

In connection with any transfer of any of the Securities evidenced by this
certificate occurring prior to the expiration of the period referred to in Rule
144(k) under the Securities Act after the later of the date of original issuance
of such Securities and the last date, if any, on which such Securities were
owned by the Company or any Affiliate of the

- --------
(1) The Holder's signature must be guaranteed by a member firm of a registered
national securities exchange or of the National Association of Securities
Dealers, Inc., a commercial bank or trust company having an office or
correspondent in the United States or an "eligible guarantor institution" as
defined by Rule 17Ad-15 under the Exchange Act.
<PAGE>

                                  E-14


Company, the undersigned confirms that such Securities are being transferred in
accordance with its terms:

CHECK ONE BOX BELOW

      (1)   |_|   to the Company; or

      (2)   |_|   pursuant to an effective registration statement under the
                  Securities Act of 1933; or

      (3)   |_|   inside the United States to a "qualified institutional buyer"
                  (as defined in Rule 144A under the Securities Act of 1933)
                  that purchases for its own account or for the account of a
                  qualified institutional buyer to whom notice is given that
                  such transfer is being made in reliance on Rule 144A, in each
                  case pursuant to and in compliance with Rule 144A under the
                  Securities Act of 1933; or

      (4)   |_|   outside the United States in an offshore transaction within
                  the meaning of Regulation S under the Securities Act in
                  compliance with Rule 904 under the Securities Act of 1933; or

      (5)   |_|   pursuant to another available exemption from registration
                  provided by Rule 144 under the Securities Act of 1933.

      Unless one of the boxes is checked, the Trustee will refuse to register
      any of the Securities evidenced by this certificate in the name of any
      person other than the registered holder thereof; provided, however, that
      if box (4) or (5) is checked, the Trustee may require, prior to
      registering any such transfer of the Securities, such legal opinions,
      certifications and other information as the Company has reasonably
      requested to confirm that such transfer is being made pursuant to an
<PAGE>

                                  E-15


      exemption from, or in a transaction not subject to, the registration
      requirements of the Securities Act of 1933, such as the exemption provided
      by Rule 144 under such Act.

                                    ______________________________
                                              Signature

Signature Guarantee:

____________________________        ___________________________
Signature must be guaranteed        Signature

- ---------------------------------------------------------------

          TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED.

            The undersigned represents and warrants that it is purchasing this
Security for its own account or an account with respect to which it exercises
sole investment discretion and that it and any such account is a "qualified
institutional buyer" within the meaning of Rule 144A under the Securities Act of
1933, and is aware that the sale to it is being made in reliance on Rule 144A
and acknowledges that it has received such information regarding the Company as
the undersigned has requested pursuant to Rule 144A or has determined not to
request such information and that it is aware that the transferor is relying
upon the undersigned's foregoing representations in order to claim the exemption
from registration provided by Rule 144A.

Dated: ________________       ______________________________
                              NOTICE: To be executed by
                              an executive officer
<PAGE>
                                       77


                  [TO BE ATTACHED TO GLOBAL SECURITIES]

          SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

            The following increases or decreases in this Global Security have
been made:

<TABLE>
<CAPTION>
Date of        Amount of decrease in         Amount of increase in      Principal amount of this      Signature of authorized
Exchange     Principal Amount of this     Principal Amount of this      Global Security following      officer of Trustee or
                 Global Security               Global Security          such decrease or increase)     Securities Custodian
<S>          <C>                          <C>                           <C>                           <C>    

</TABLE>
<PAGE>

                                      E-17


                       OPTION OF HOLDER TO ELECT PURCHASE


            If you wish to have this Note purchased by the Company pursuant to
Section 4.11 or Section 4.12 of the Indenture, check the Box: |_|

            If you wish to have a portion of this Note purchased by the Company
pursuant to Section 4.11 or Section 4.12 of the Indenture, state the amount (in
principal amount): $______________

Date:_______________________________

Your Signature:_________________________________________________________________
              (Sign exactly as your name appears on the other side of this Note)

Signature Guarantee:______________________________(2)

- ----------
(2) The Holder's signature must be guaranteed by a member firm of a registered
national securities exchange or of the National Association of Securities
Dealers, Inc., a commercial bank or trust company having an office or
correspondent in the United States or an "eligible guarantor institution" as
defined by Rule 17Ad-15 under the Exchange Act.
<PAGE>



                                                                  EXECUTION COPY

                              $300,000,000

                      WINSTAR COMMUNICATIONS, INC.

      $100,000,000 14 1/2% Senior Deferred Interest Notes Due 2005

                        WINSTAR EQUIPMENT CORP.

     $200,000,000 12 1/2% Guaranteed Senior Secured Notes Due 2004


                     REGISTRATION RIGHTS AGREEMENT

                                                          March 13, 1997

Credit Suisse First Boston Corporation
BT Securities Corporation
c/o Credit Suisse First Boston Corporation
      Eleven Madison Avenue
      New York, New York  10010

Dear Sirs:

      WinStar Communications, Inc., a Delaware corporation ("WinStar"), and
WinStar Equipment Corp., a Delaware corporation ("WinStar Equipment" and,
together with WinStar, the "Issuers"), propose to issue and sell to Credit
Suisse First Boston Corporation and BT Securities Corporation (the "Initial
Purchasers"), upon the terms set forth in a purchase agreement of even date
herewith (the "Purchase Agreement"), $100,000,000 aggregate principal amount of
WinStar's 14 1/2% Senior Deferred Interest Notes Due 2005 (the "Senior Notes");
and $200,000,000 aggregate principal amount of WinStar Equipment's 12 1/2%
Guaranteed Senior Secured Notes Due 2004 (the "Equipment Notes" and, together
with the Senior Notes, the "Notes"). The Equipment Notes will be unconditionally
guaranteed on a senior basis (the "Equipment Note Guarantee") by WinStar (in
such capacity, the "Guarantor"). Each of the Senior Notes and the Equipment
Notes will be issued pursuant to a separate Indenture, dated as of March 1, 1997
(each, an "Indenture" and collectively, the "Indentures"), among WinStar or
WinStar Equipment, as the case may be, the Guarantor, in the case of the
Indenture governing the Equipment Notes, and United States Trust Company of New
York (the "Trustee"). As an inducement to the Initial Purchasers, the Issuers
agree with the Initial Purchasers, for the benefit of the holders of the Notes
(including, without limitation, the Initial Purchasers), the Exchange Securities
(as defined below) and the Private Exchange Securities (as defined below)
(collectively the "Holders"), as follows:

      1. Registered Exchange Offer. The Issuers shall, at WinStar's cost,
prepare and, not later than 45 days after (or if the 45th day is not a business
day, the first business day thereafter) the date of original issue of the Notes
(the "Issue Date"), file with the Securities and Exchange Commission (the
"Commission") a registration statement or statements (the "Exchange Offer
Registration Statement") on an appropriate form under the Securities Act of
1933, as amended (the "Securities Act"), with respect to a proposed offer (each
a "Registered Exchange Offer" and, collectively, the "Registered Exchange
Offers") to the Holders of each of the Senior Notes and the Equipment Notes, who
are not prohibited by any law or policy of the 
<PAGE>

                                                                               2


Commission from participating in such a Registered Exchange Offer, to issue and
deliver to such Holders, in exchange for their respective Notes, a like
aggregate principal amount of debt securities of the applicable Issuer
(collectively, the "Exchange Securities") issued under the relevant Indenture
and identical in all material respects to the Senior Notes or the Equipment
Notes, as the case may be, (except for the transfer restrictions relating to
such Notes), that would be registered under the Securities Act. The Issuers
shall use their best efforts to cause such Exchange Offer Registration Statement
to become effective under the Securities Act within 150 days (or if the 150th
day is not a business day, the first business day thereafter) after the Issue
Date of the Notes and shall keep the Exchange Offer Registration Statement
effective for not less than 30 days (or longer, if required by applicable law)
after the date notice of the Registered Exchange Offers is mailed to the Holders
(such period being called the "Exchange Offer Registration Period").

      If the Issuers effect the Registered Exchange Offers, the Issuers will be
entitled to close such Registered Exchange Offers 30 days after the commencement
thereof provided that the applicable Issuer has accepted all the Notes
theretofore validly tendered in accordance with the terms of the respective
Registered Exchange Offer.

      Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Issuers shall promptly commence the Registered
Exchange Offers, it being the objective of such Registered Exchange Offers to
enable each Holder of the Notes electing to exchange such Notes for Exchange
Securities (assuming that such Holder is not an affiliate of the Issuers within
the meaning of the Securities Act, acquires the Exchange Securities in the
ordinary course of such Holder's business and has no arrangements with any
person to participate in the distribution of the Exchange Securities and is not
prohibited by any law or policy of the Commission from participating in the
Registered Exchange Offers) to trade such Exchange Securities from and after
their receipt without any limitations or restrictions under the Securities Act
and without material restrictions under the securities laws of the several
states of the United States.

      The Issuers acknowledge that, pursuant to current interpretations by the
Commission's staff of Section 5 of the Securities Act, in the absence of an
applicable exemption therefrom, (i) each Holder which is a broker-dealer
electing to exchange Notes, acquired for its own account as a result of market
making activities or other trading activities, for Exchange Securities (an
"Exchanging Dealer"), is required to deliver a prospectus containing the
information set forth in Annex A hereto on the cover, in Annex B hereto in the
"Exchange Offer Procedures" section and the "Purpose of the Exchange Offer"
section, and in Annex C hereto in the "Plan of Distribution" section of such
prospectus in connection with a sale of any such Exchange Securities received by
such Exchanging Dealer pursuant to a Registered Exchange Offer and (ii) an
Initial Purchaser that elects to sell Exchange Securities acquired in exchange
for Notes constituting any portion of an unsold allotment is required to deliver
a prospectus containing the information required by Items 507 or 508 of
Regulation S-K under the Securities Act, as applicable, in connection with such
sale.

      The Issuers shall use their best efforts to keep the Exchange Offer
Registration Statement effective and to amend and supplement the prospectus
contained therein, in order to permit such prospectus to be lawfully delivered
by all persons subject to the prospectus delivery requirements of the Securities
Act for such period of time as such persons must comply with such requirements
in order to resell the Exchange Securities; provided, however, that (i) in the
case where such prospectus and any amendment or supplement thereto must be
delivered by an Exchanging Dealer or an Initial Purchaser, such period shall be
the lesser of 180 days and the date on which all Exchanging Dealers and the
Initial Purchasers have sold all Exchange Securities held by them (unless such
period is extended pursuant to Section 3(j) below) and (ii) the Issuers shall
make such prospectus and any amendment or supplement thereto, available to any
broker-dealer for 
<PAGE>
                                                                               3


use in connection with any resale of any Exchange Securities for a period not
less than 90 days after the consummation of the Registered Exchange Offers.

      If, upon consummation of the Registered Exchange Offers, any Initial
Purchaser holds Senior Notes or Equipment Notes acquired by it as part of its
initial distribution, the applicable Issuer, simultaneously with the delivery of
the Exchange Securities pursuant to the relevant Registered Exchange Offer,
shall issue and deliver to such Initial Purchaser upon the written request of
such Initial Purchaser, in exchange (each a "Private Exchange" and,
collectively, the "Private Exchanges") for the respective Notes held by such
Initial Purchaser, a like principal amount of debt securities of the applicable
Issuer issued under the relevant Indenture and identical in all material
respects (including the existence of restrictions on transfer under the
Securities Act and the securities laws of the several states of the United
States) to the Senior Notes or the Equipment Notes, as the case may be
(collectively, the "Private Exchange Securities"). The Notes, the Exchange
Securities and the Private Exchange Securities are herein collectively called
the "Securities".

      In connection with each Registered Exchange Offer, the applicable Issuer
shall:

      (a) mail to each Holder a copy of the prospectus forming part of the
Exchange Offer Registration Statement, together with an appropriate letter of
transmittal and related documents;

      (b) keep the Registered Exchange Offer open for not less than 30 days (or
longer, if required by applicable law) after the date notice thereof is mailed
to the Holders;

      (c) utilize the services of a depositary for the Registered Exchange Offer
with an address in the Borough of Manhattan, The City of New York, which may be
the Trustee or an affiliate of the Trustee;

      (d) permit Holders to withdraw tendered Notes at any time prior to the
close of business, New York time, on the last business day on which the
Registered Exchange Offer shall remain open; and

      (e)  otherwise comply with all applicable laws.

      As soon as practicable after the close of a Registered Exchange Offer or
Private Exchange, as the case may be, the applicable Issuer shall:

      (x) accept for exchange all the Notes validly tendered and not withdrawn
pursuant to the Registered Exchange Offer or the Private Exchange, as the case
may be (such acceptance constituting the "consummation" of such Registered
Exchange Offer notwithstanding the fact that not all of the Notes may have been
so tendered);

      (y) deliver to the Trustee for cancellation all the Notes so accepted for
exchange; and

      (z) cause the Trustee to authenticate and deliver promptly to each Holder
which validly tendered Notes, Exchange Securities or Private Exchange
Securities, as the case may be, equal in principal amount to the Notes of such
Holder so accepted for exchange.

      Each Indenture will provide that the Exchange Securities subject to such
Indenture will not be subject to the transfer restrictions set forth in such
Indenture. Each Indenture will also provide that all the Notes, Exchange
Securities and Private Exchange Securities subject to such Indenture will vote
and consent together on all matters as one class and that none of the Notes,
Exchange Securities or Private Exchange 
<PAGE>
                                                                               4


Securities subject to such Indenture will have the right to vote or consent as a
separate class from one another on any matter.

      Interest on each Exchange Security or Private Exchange Security issued
pursuant to a Registered Exchange Offer or Private Exchange will accrue from the
last interest payment date on which interest was paid on the Note surrendered in
exchange therefor or, if no interest has been paid on such Note, from the date
of original issue of such Note.

      Each Holder tendering Notes in a Registered Exchange Offer shall be
required to represent to the applicable Issuer that at the time of the
consummation of such Registered Exchange Offer (i) any Exchange Securities
received by such Holder will be acquired in the ordinary course of business,
(ii) such Holder will have no arrangements or understanding with any person to
participate in the distribution of the Notes or the Exchange Securities within
the meaning of the Securities Act, (iii) such Holder is not an "affiliate," as
defined in Rule 405 of the Securities Act, of such Issuer or if it is an
affiliate, such Holder will comply with the registration and prospectus delivery
requirements of the Securities Act to the extent applicable, (iv) if such Holder
is not a broker-dealer, that it is not engaged in, and does not intend to engage
in, the distribution of the Exchange Securities and (v) if such Holder is a
broker-dealer, that it will receive Exchange Securities for its own account in
exchange for Notes that were acquired as a result of market-making activities or
other trading activities and that it will be required to acknowledge that it
will deliver a prospectus in connection with any resale of such Exchange
Securities.

      Notwithstanding any other provisions hereof, the Issuers will ensure that
(i) any Exchange Offer Registration Statement and any amendment thereto and any
prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations
thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer Registration Statement, and any supplement to
such prospectus, does not include an untrue statement of a material fact or omit
to state a material fact required to be stated therein or necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading.

      2. Shelf Registration. If, (i) because of any change in law or in
applicable interpretations thereof by the staff of the Commission, the Issuers
are not permitted to effect the Registered Exchange Offers, as contemplated by
Section 1 hereof, (ii) the Registered Exchange Offers are not consummated within
180 days of the Issue Date, (iii) any Initial Purchaser so requests with respect
to the Notes (or the Private Exchange Securities) not eligible to be exchanged
for Exchange Securities in a Registered Exchange Offer and held by it following
consummation of the Registered Exchange Offers or (iv) any Holder of Notes
(other than an Exchanging Dealer) is not eligible to participate in the relevant
Registered Exchange Offer or, in the case of any Holder (other than an
Exchanging Dealer) that participates in a Registered Exchange Offer, such Holder
does not receive freely tradeable Exchange Securities on the date of the
exchange, the Issuers shall take the following actions:

      (a) The Issuers shall, at their cost, as promptly as practicable (but in
no event more than 30 days after so required or requested pursuant to this
Section 2) file with the Commission and thereafter shall use their best efforts
to cause to be declared effective a registration statement or statements (the
"Shelf Registration Statement" and, together with the Exchange Offer
Registration Statement, a "Registration Statement") on an appropriate form under
the Securities Act relating to the offer and sale of the Transfer 
<PAGE>
                                                                               5


Restricted Securities (as defined in Section 6 hereof) by the Holders thereof
from time to time in accordance with the methods of distribution set forth in
the Shelf Registration Statement and Rule 415 under the Securities Act
(hereinafter, the "Shelf Registration"); provided, however, that no Holder
(other than an Initial Purchaser) shall be entitled to have the Securities held
by it covered by such Shelf Registration Statement unless such Holder agrees in
writing to be bound by all the provisions of this Agreement applicable to such
Holder.

      (b) The Issuers shall use their best efforts to keep the Shelf
Registration Statement continuously effective in order to permit the prospectus
included therein to be lawfully delivered by the Holders of the relevant
Securities, for a period of two years (or for such longer period if extended
pursuant to Section 3(j) below) from the date of its effectiveness or such
shorter period that will terminate when all the Securities covered by the Shelf
Registration Statement (i) have been sold pursuant thereto or (ii) are eligible
for sale under Rule 144(k) under the Securities Act. The Issuers shall be deemed
not to have used their best efforts to keep the Shelf Registration Statement
effective during the requisite period if they voluntarily take any action (other
than any action permitted to be taken under this Agreement) that would result in
Holders of Securities covered thereby not being able to offer and sell such
Securities during that period, unless such action is required by applicable law.

      (c) Notwithstanding any other provisions of this Agreement to the
contrary, the Issuers shall cause the Shelf Registration Statement and the
related prospectus and any amendment or supplement thereto, as of the effective
date of the Shelf Registration Statement, amendment or supplement, (i) to comply
in all material respects with the applicable requirements of the Securities Act
and the rules and regulations of the Commission and (ii) not to contain any
untrue statement of a material fact or omit to state a material fact required to
be stated therein or necessary in order to make the statements therein, in light
of the circumstances under which they were made, not misleading.

      3. Registration Procedures. In connection with any Shelf Registration
contemplated by Section 2 hereof and, to the extent applicable, any Registered
Exchange Offer contemplated by Section 1 hereof, the following provisions shall
apply:

      (a) The applicable Issuer or Issuers shall (i) furnish to each Initial
Purchaser, prior to the filing thereof with the Commission, a copy of the
Registration Statement and each amendment thereof and each supplement, if any,
to the prospectus included therein and, in the event that an Initial Purchaser
(with respect to any portion of an unsold allotment from the original offering)
is participating in the Registered Exchange Offer or the Shelf Registration,
shall use their best efforts to reflect in each such document, when so filed
with the Commission, such comments as such Initial Purchaser reasonably and
timely may propose; (ii) include the information set forth in Annex A hereto on
the cover, in Annex B hereto in the "Exchange Offer Procedures" section and the
"Purpose of the Exchange Offer" section and in Annex C hereto in the "Plan of
Distribution" section of the prospectus forming a part of the Exchange Offer
Registration Statement and include the information set forth in Annex D hereto
in the Letter of Transmittal delivered pursuant to such Registered Exchange
Offer; (iii) if requested by an Initial Purchaser, include the information
required by Items 507 or 508 of Regulation S-K under the Securities Act, as
applicable, in the prospectus forming a part of the Exchange Offer Registration
Statement; (iv) include within the prospectus contained in the Exchange Offer
Registration Statement a section entitled "Plan of Distribution," reasonably
acceptable to the Initial Purchasers, which shall contain a summary statement of
the positions taken or policies made by the staff of the Commission with respect
to the potential "underwriter" status of any broker-dealer that is the
beneficial owner (as defined in Rule 13d-3 under the Securities Exchange Act of
1934, as amended (the "Exchange Act")) of Exchange Securities received by such
broker-dealer in such Registered Exchange Offer 
<PAGE>
                                                                               6


(a "Participating Broker-Dealer"), whether such positions or policies have been
publicly disseminated by the staff of the Commission or such positions or
policies, in the reasonable judgment of the Initial Purchasers based upon advice
of counsel (which may be in-house counsel), represent the prevailing views of
the staff of the Commission; and (v) in the case of a Shelf Registration,
include the names of the Holders, who propose to sell Securities pursuant to the
Shelf Registration Statement, as selling securityholders.

      (b) The Issuers shall give written notice to the Initial Purchasers, the
Holders of the Securities and any Participating Broker-Dealer from whom the
Issuers have received prior written notice that it will be a Participating
Broker-Dealer in a Registered Exchange Offer (which notice pursuant to clauses
(ii)-(v) hereof shall be accompanied by an instruction to suspend the use of the
prospectus until the requisite changes have been made):

      (i) when the Registration Statement or any amendment thereto has been
filed with the Commission and when the Registration Statement or any
post-effective amendment thereto has become effective;

      (ii) of any request by the Commission for amendments or supplements to the
Registration Statement or the prospectus included therein or for additional
information;

      (iii) of the issuance by the Commission of any stop order suspending the
effectiveness of the Registration Statement or the initiation of any proceedings
for that purpose;

      (iv) of the receipt by the Issuers or their legal counsel of any
notification with respect to the suspension of the qualification of the
Securities for sale in any jurisdiction or the initiation or threatening of any
proceeding for such purpose; and

      (v) of the happening of any event that requires the Issuers to make
changes in the Registration Statement or the prospectus in order that the
Registration Statement or the prospectus does not contain an untrue statement of
a material fact nor omit to state a material fact required to be stated therein
or necessary to make the statements therein (in the case of the prospectus, in
light of the circumstances under which they were made) not misleading.

      (c) The Issuers shall make every reasonable effort to obtain the
withdrawal at the earliest possible time, of any order suspending the
effectiveness of the Registration Statement.

      (d) The Issuers shall furnish to each Holder of Securities included within
the coverage of the Shelf Registration, without charge, at least one copy of the
Shelf Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, and, if the Holder so requests in writing,
all exhibits thereto (including those, if any, incorporated by reference).

      (e) The Issuers shall deliver to each Exchanging Dealer and each Initial
Purchaser, and to any other Holder who so requests, without charge, at least one
copy of the Exchange Offer Registration Statement and any post-effective
amendment thereto, including financial statements and schedules, and, if any
Initial Purchaser or any such Holder requests, all exhibits thereto (including
those incorporated by reference).

      (f) The Issuers shall, during the Shelf Registration Period, deliver to
each Holder of Securities included within the coverage of the Shelf
Registration, without charge, as many copies of the prospectus 
<PAGE>
                                                                               7


(including each preliminary prospectus) included in the Shelf Registration
Statement and any amendment or supplement thereto as such person may reasonably
request. The Issuers consent, subject to the provisions of this Agreement, to
the use of the prospectus or any amendment or supplement thereto by each of the
selling Holders of the Securities in connection with the offering and sale of
the Securities covered by the prospectus, or any amendment or supplement
thereto, included in the Shelf Registration Statement.

      (g) The Issuers shall deliver to each Initial Purchaser, any Exchanging
Dealer, any Participating Broker-Dealer and such other persons required to
deliver a prospectus following the Registered Exchange Offers, without charge,
as many copies of the final prospectus included in the Exchange Offer
Registration Statement and any amendment or supplement thereto as such persons
may reasonably request. The Issuers consent, subject to the provisions of this
Agreement, to the use of the prospectus or any amendment or supplement thereto
by any Initial Purchaser, if necessary, any Participating Broker-Dealer and such
other persons required to deliver a prospectus following the Registered Exchange
Offers in connection with the offering and sale of the Exchange Securities
covered by the prospectus, or any amendment or supplement thereto, included in
such Exchange Offer Registration Statement.

      (h) Prior to any public offering of the Securities, pursuant to any
Registration Statement, the Issuers shall register or qualify or cooperate with
the Holders of the Securities included therein and their respective counsel in
connection with the registration or qualification of the Securities for offer
and sale under the securities or "blue sky" laws of such states of the United
States as any Holder of the Securities reasonably requests in writing and do any
and all other acts or things necessary or advisable to enable the offer and sale
in such jurisdictions of the Securities covered by such Registration Statement;
provided, however, that the Issuers shall not be required to (i) qualify
generally to do business in any jurisdiction where they are not then so
qualified or (ii) take any action which would subject them to general service of
process or to taxation in any jurisdiction where they are not then so subject.

      (i) The Issuers shall cooperate with the Holders of the Securities to
facilitate the timely preparation and delivery of certificates representing the
Securities to be sold pursuant to any Registration Statement free of any
restrictive legends and in such denominations and registered in such names as
the Holders may request a reasonable period of time prior to sales of the
Securities pursuant to such Registration Statement.

      (j) Upon the occurrence of any event contemplated by paragraphs (ii)
through (v) of Section 3(b) above during the period for which the Issuers are
required to maintain an effective Registration Statement, the Issuers shall
promptly prepare and file a post-effective amendment to the Registration
Statement or a supplement (by way of incorporation by reference from an Exchange
Act report or otherwise) to the related prospectus and any other required
document so that, as thereafter delivered to Holders of the Notes or purchasers
of Securities, the prospectus will not contain an untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. If the Issuers notify the Initial
Purchasers, the Holders of the Securities and any known Participating
Broker-Dealer in accordance with paragraphs (ii) through (v) of Section 3(b)
above to suspend the use of the prospectus until the requisite changes to the
prospectus have been made, then the Initial Purchasers, the Holders of the
Securities and any such Participating Broker-Dealers shall suspend use of such
prospectus, and the period of effectiveness of the Shelf Registration Statement
provided for in Section 2(b) above (unless and until the Securities covered
thereby are eligible for sale under Rule 144(k) under the Securities Act) or the
Exchange Offer Registration Statement provided for in Section 1 above, as the
case may be, shall be extended by the number of days from and including the date
of the giving of such notice to and including the date when the Initial
Purchasers, the Holders of the Securities and any known Participating
Broker-Dealer shall have received 
<PAGE>
                                                                               8


such amended or supplemented prospectus pursuant to this Section 3(j).

      (k) Not later than the effective date of the applicable Registration
Statement, the Issuers will provide CUSIP numbers for the Notes, the Exchange
Securities or the Private Exchange Securities, as the case may be, and provide
the applicable trustee with printed certificates for the Notes, the Exchange
Securities or the Private Exchange Securities, as the case may be, in forms
eligible for deposit with The Depository Trust Company.

      (l) The Issuers will comply with all rules and regulations of the
Commission to the extent and so long as they are applicable to the Registered
Exchange Offers or the Shelf Registration and WinStar will make generally
available to the Issuers' security holders (or otherwise provide in accordance
with Section 11(a) of the Securities Act) an earnings statement satisfying the
provisions of Section 11(a) of the Securities Act, no later than 45 days after
the end of a 12-month period (or 90 days, if such period is a fiscal year)
beginning with the first month of WinStar's first fiscal quarter commencing
after the effective date of the Registration Statement, which statement shall
cover such 12-month period.

      (m) The Issuers shall cause the Indentures to be qualified under the Trust
Indenture Act of 1939, as amended, in a timely manner and containing such
changes, if any, as shall be necessary for such qualification. In the event that
such qualification would require the appointment of a new trustee under any of
the Indentures, the Issuers shall appoint a new trustee thereunder pursuant to
the applicable provisions of such Indenture.

      (n) The Issuers may require each Holder of Securities to be sold pursuant
to the Shelf Registration Statement to furnish to the Issuers such information
regarding the Holder, his ownership of Securities and the distribution of the
Securities as the Issuers may from time to time reasonably require for inclusion
in the Shelf Registration Statement, and the Issuers may exclude from such
registration the Securities of any Holder that fails to furnish such information
within a reasonable time after receiving such request.

      (o) The Issuers shall enter into such customary agreements (including if
requested an underwriting agreement in customary form) and take all such other
action, if any, as any Holder of the Securities shall reasonably request in
order to facilitate the disposition of the Securities pursuant to any Shelf
Registration.

      (p) In the case of any Shelf Registration, the Issuers shall (i) make
reasonably available for inspection by the Holders of the Securities, any
underwriter participating in any disposition pursuant to the Shelf Registration
Statement and any attorney, accountant or other agent retained by the Holders of
the Securities or any such underwriter all relevant financial and other records,
pertinent corporate documents and properties of the Issuers and (ii) cause the
Issuers' officers, directors, employees, accountants and auditors to supply all
relevant information reasonably requested by the Holders of the Securities or
any such underwriter, attorney, accountant or agent in connection with the Shelf
Registration Statement, in each case, as shall be reasonably necessary to enable
such persons, to conduct a reasonable investigation within the meaning of
Section 11 of the Securities Act; provided, however, that the foregoing
inspection and information gathering shall be coordinated on behalf of the
Initial Purchasers by you and on behalf of the other parties, by one counsel
designated by and on behalf of such other parties as described in Section 4
hereof; provided, further, that any records, documents, properties or
information that are designated by the Issuers as confidential at the time of
delivery of such records, documents, properties or information shall be kept
confidential by such persons, unless (i) such records, documents, properties or
information are in the public domain or otherwise publicly available, (ii)
disclosure of such records, documents, properties or information is required by
court or administrative order or (iii) disclosure of such records, documents,
<PAGE>
                                                                               9


properties or information, in the written opinion of counsel to such person, is
otherwise required by law (including, without limitation, pursuant to the
requirements of the Securities Act).

      (q) In the case of any Shelf Registration, the Issuers, if requested by
any Holder of Securities covered thereby, shall cause (i) their counsel to
deliver an opinion and updates thereof relating to the Securities in customary
form addressed to such Holders and the managing underwriters, if any, thereof
and dated, in the case of the initial opinion, the effective date of such Shelf
Registration Statement (it being agreed that the matters to be covered by such
opinion shall include, without limitation, the due incorporation and good
standing of the Issuers and their subsidiaries; the due authorization, execution
and delivery of the relevant agreement of the type referred to in Section 3(o)
hereof; the due authorization, execution, authentication and issuance, and the
validity and enforceability, of the applicable Securities; the absence of
governmental approvals required to be obtained in connection with the Shelf
Registration Statement, the offering and sale of the applicable Securities, or
any agreement of the type referred to in Section 3(o) hereof; the compliance as
to form of such Shelf Registration Statement and any documents incorporated by
reference therein and of the Indentures with the requirements of the Securities
Act and the Trust Indenture Act, respectively; and, as of the date of the
opinion and as of the effective date of the Shelf Registration Statement or most
recent post-effective amendment thereto, as the case may be, the absence from
such Shelf Registration Statement and the prospectus included therein, as then
amended or supplemented, and from any documents incorporated by reference
therein of an untrue statement of a material fact or the omission to state
therein a material fact required to be stated therein or necessary to make the
statements therein not misleading (in the case of any such documents, in the
light of the circumstances existing at the time that such documents were filed
with the Commission under the Exchange Act); (ii) their officers to execute and
deliver all customary documents and certificates and updates thereof reasonably
requested by any underwriters of the applicable Securities and (iii) their
independent public accountants to provide to the selling Holders of the
applicable Securities and any underwriter therefor a comfort letter in customary
form and covering matters of the type customarily covered in comfort letters in
connection with primary underwritten offerings, subject to receipt of
appropriate documentation as contemplated, and only if permitted, by Statement
of Auditing Standards No. 72.

      (r) In the case of the Registered Exchange Offer, if requested by any
Initial Purchaser or any known Participating Broker-Dealer, the Issuers shall
cause (i) their counsel to deliver to such Initial Purchaser or such
Participating Broker-Dealer a signed opinion in the form set forth in Section
6(c) of the Purchase Agreement with such changes as are customary in connection
with the preparation of a Registration Statement and (ii) their independent
public accountants to deliver to such Initial Purchaser or such Participating
Broker-Dealer a comfort letter, in customary form, meeting the requirements as
to the substance thereof as set forth in Sections 6(a) and (f) of the Purchase
Agreement, with appropriate date changes.

      (s) If a Registered Exchange Offer or a Private Exchange is to be
consummated, upon delivery of the Notes by Holders to the Issuers (or to such
other Person as directed by the Issuers) in exchange for the Exchange Securities
or the Private Exchange Securities, as the case may be, the Issuers shall mark,
or cause to be marked, on the Notes so exchanged that such Notes are being
canceled in exchange for the Exchange Securities or the Private Exchange
Securities, as the case may be; in no event shall the Notes be marked as paid or
otherwise satisfied.

      (t) The Issuers shall (a) if the Notes have been rated prior to the
initial sale of such Notes, use their best efforts to confirm such ratings will
apply to the Securities covered by a Registration Statement, or (b) if the Notes
were not previously rated, use commercially reasonable efforts to cause the
Securities 
<PAGE>
                                       10


covered by a Registration Statement to be rated with the appropriate rating
agencies, if so requested by Holders of a majority in aggregate principal amount
of Securities covered by such Registration Statement, or by the managing
underwriters, if any.

      (u) In the event that any broker-dealer registered under the Exchange Act
shall underwrite any Securities or participate as a member of an underwriting
syndicate or selling group or "assist in the distribution" (within the meaning
of the Conduct Rules of the National Association of Securities Dealers, Inc.
("NASD")) thereof, whether as a Holder of such Securities or as an underwriter,
a placement or sales agent or a broker or dealer in respect thereof, or
otherwise, the Issuers shall assist such broker-dealer in complying with the
requirements of such Conduct Rules, including, without limitation, by (i) if
Rule 2720 thereto shall so require, engaging (solely, except in the case of an
Initial Purchaser, at such broker-dealer's expense) a "qualified independent
underwriter" (as defined in Rule 2720) to participate in the preparation of the
Registration Statement relating to such Securities, to exercise usual standards
of due diligence in respect thereto and, if any portion of the offering
contemplated by such Registration Statement is an underwritten offering or is
made through a placement or sales agent, to recommend the yield of such
Securities, (ii) indemnifying any such qualified independent underwriter to the
extent of the indemnification of underwriters provided in Section 5 hereof and
(iii) providing such information to such broker-dealer as may be required in
order for such broker-dealer to comply with the requirements of the Rules of
Fair Practice of the NASD.

      (v) The Issuers shall use their best efforts to take all other steps
necessary to effect the registration of the Securities covered by a Registration
Statement contemplated hereby.

      4. Registration Expenses. WinStar shall bear all fees and expenses
incurred by the Issuers in connection with the performance of their obligations
under Sections 1 through 3 hereof, whether or not the respective Registered
Exchange Offer or a Shelf Registration is filed or becomes effective, and, in
the event of a Shelf Registration, shall bear or reimburse the Holders of the
Securities covered thereby for the reasonable fees and disbursements of one firm
of counsel designated by the Holders of a majority in principal amount of the
Securities covered thereby to act as counsel for the Holders of the Securities
in connection therewith. Each Holder of the Securities shall pay all
underwriting discounts, if any, and commissions and transfer taxes, if any,
relating to the sale or disposition of such Holder's Securities.

      5. Indemnification. (a) The Issuers severally and jointly agree to
indemnify and hold harmless each Holder of the Securities, any Participating
Broker-Dealer and each person, if any, who controls such Holder or such
Participating Broker-Dealer within the meaning of the Securities Act or the
Exchange Act (each Holder, any Participating Broker-Dealer and such controlling
persons are referred to collectively as the "Indemnified Parties") from and
against any losses, claims, damages or liabilities, joint or several, or any
actions in respect thereof (including, but not limited to, any losses, claims,
damages, liabilities or actions relating to purchases and sales of the
Securities) to which each Indemnified Party may become subject under the
Securities Act, the Exchange Act or otherwise, insofar as such losses, claims,
damages, liabilities or actions arise out of or are based upon any untrue
statement or alleged untrue statement of a material fact contained in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration, or arise out
of, or are based upon, the omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, and shall reimburse, as incurred, the Indemnified
Parties for any legal or other expenses reasonably incurred by them in
connection with investigating or defending any such loss, claim, damage,
liability or action in respect thereof; provided, however, that (i) the Issuers
shall not be liable in any such case to the extent that such loss, claim, damage
or liability arises out of or is based upon any 
<PAGE>
                                       11


untrue statement or alleged untrue statement or omission or alleged omission
made in a Registration Statement or prospectus or in any amendment or supplement
thereto or in any preliminary prospectus relating to a Shelf Registration in
reliance upon and in conformity with written information pertaining to such
Holder and furnished to the Issuers by or on behalf of such Holder specifically
for inclusion therein and (ii) with respect to any untrue statement or omission
or alleged untrue statement or omission made in any preliminary prospectus
relating to a Shelf Registration Statement, the indemnity agreement contained in
this subsection (a) shall not inure to the benefit of any Holder or
Participating Broker-Dealer from whom the person asserting any such losses,
claims, damages or liabilities purchased the Securities concerned, to the extent
that a prospectus relating to such Securities was required to be delivered by
such Holder or Participating Broker-Dealer under the Securities Act in
connection with such purchase and any such loss, claim, damage or liability of
such Holder or Participating Broker-Dealer results from the fact that there was
not sent or given to such person, at or prior to the written confirmation of the
sale of such Securities to such person, a copy of the final prospectus if the
Issuers had previously furnished copies thereof to such Holder or Participating
Broker-Dealer; provided further, however, that this indemnity agreement will be
in addition to any liability which the Issuers may otherwise have to such
Indemnified Party. The Issuers shall also indemnify underwriters, their officers
and directors and each person who controls such underwriters within the meaning
of the Securities Act or the Exchange Act to the same extent as provided above
with respect to the indemnification of the Holders of the Securities if
requested by such Holders.

      (b) Each Holder of the Securities, severally and not jointly, will
indemnify and hold harmless the Issuers and each person, if any, who controls
the Issuers 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 Issuers or any such controlling person may become subject
under the Securities Act, the Exchange Act or otherwise, insofar as such losses,
claims, damages, liabilities or actions arise out of or are based upon any
untrue statement or alleged untrue statement of a material fact contained in a
Registration Statement or prospectus or in any amendment or supplement thereto
or in any preliminary prospectus relating to a Shelf Registration, or arise out
of or are based upon the omission or alleged omission to state therein a
material fact necessary to make the statements therein not misleading, but in
each case only to the extent that the untrue statement or omission or alleged
untrue statement or omission was made in reliance upon and in conformity with
written information pertaining to such Holder and furnished to the Issuers by or
on behalf of such Holder specifically for inclusion therein; and, subject to the
limitation set forth immediately preceding this clause, shall reimburse, as
incurred, the Issuers for any legal or other expenses reasonably incurred by the
Issuers or any such controlling person in connection with investigating or
defending any loss, claim, damage, liability or action in respect thereof. This
indemnity agreement will be in addition to any liability which such Holder may
otherwise have to the Issuers or any of their controlling persons.

      (c) Promptly after receipt by an indemnified party under this Section 5 of
notice of the commencement of any action or proceeding (including a governmental
investigation), such indemnified party will, if a claim in respect thereof is to
be made against the indemnifying party under this Section 5, notify the
indemnifying party of the commencement thereof; but the omission so to notify
the indemnifying party will not, in any event, relieve the indemnifying party
from any obligations to any indemnified party other than the indemnification
obligation provided in paragraph (a) or (b) above. In case any such action is
brought against any indemnified party, and it notifies the indemnifying party of
the commencement thereof, the indemnifying party will be entitled to participate
therein and, to the extent that it may wish, jointly with any other indemnifying
party similarly notified, to assume the defense thereof, with counsel reasonably
satisfactory to such indemnified party (who shall not, except with the consent
of the indemnified party, be counsel to the indemnifying party), and after
notice from the indemnifying party to such indemnified party 
<PAGE>
                                                                              12


of its election so to assume the defense thereof the indemnifying party will not
be liable to such indemnified party under this Section 5 for any legal or other
expenses, other than reasonable costs of investigation, subsequently incurred by
such indemnified party in connection with the defense thereof. No indemnifying
party shall, without the prior written consent of the indemnified party, effect
any settlement of any pending or threatened action in respect of which any
indemnified party is or could have been a party and indemnity could have been
sought hereunder by such indemnified party unless such settlement includes an
unconditional release of such indemnified party from all liability on any claims
that are the subject matter of such action.

      (d) If the indemnification provided for in this Section 5 is unavailable
or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to in subsection (a) or (b)
above (i) in such proportion as is appropriate to reflect the relative benefits
received by the indemnifying party or parties on the one hand and the
indemnified party on the other from the exchange of the respective Notes,
pursuant to the relevant Registered Exchange Offers, or (ii) if the allocation
provided by the foregoing clause (i) is not permitted by applicable law, in such
proportion 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 Issuers on the one hand or
such Holder or such other indemnified party, as the case may be, on the other,
and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The amount paid by
an indemnified party as a result of the losses, claims, damages or liabilities
referred to in the first sentence of this subsection (d) shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in connection with investigating or defending any action or claim which is
the subject of this subsection (d). Notwithstanding any other provision of this
Section 5(d), the Holders of the Securities shall not be required to contribute
any amount in excess of the amount by which the net proceeds received by such
Holders from the sale of the Securities pursuant to a Registration Statement
exceeds the amount of damages which such Holders have otherwise been required to
pay by reason of such untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. For purposes
of this paragraph (d), each person, if any, who controls such indemnified party
within the meaning of the Securities Act or the Exchange Act shall have the same
rights to contribution as such indemnified party and each person, if any, who
controls the Issuers within the meaning of the Securities Act or the Exchange
Act shall have the same rights to contribution as the Issuers.

      (e) The agreements contained in this Section 5 shall survive the sale of
the Securities pursuant to a Registration Statement and shall remain in full
force and effect, regardless of any termination or cancellation of this
Agreement or any investigation made by or on behalf of any indemnified party.

      6. Additional Interest Under Certain Circumstances. (a) Additional
interest (the "Additional Interest") with respect to a series of the Securities
shall be assessed as follows if any of the following events occur (each such
event in clauses (i) through (iii) below a "Registration Default"):
<PAGE>
                                                                              13


      (i) If by May 2, 1997, neither the Exchange Offer Registration Statement
nor a Shelf Registration Statement relating to such series of Securities has
been filed with the Commission;

      (ii) If by September 15, 1997, neither the Registered Exchange Offer
relating to such series of Securities is consummated nor, if required in lieu
thereof, a Shelf Registration Statement relating to such series of Securities is
declared effective by the Commission; or

      (iii) If, after September 15, 1997, and after either the Exchange Offer
Registration Statement or the Shelf Registration Statement relating to such
series of Securities is declared effective (A) such Registration Statement
thereafter ceases to be effective (except as permitted in paragraph (b)); or (B)
such Registration Statement or the related prospectus ceases to be usable
(except as permitted in paragraph (b)) in connection with resales of Transfer
Restricted Securities during the periods specified herein because either (1) any
event occurs as a result of which the related prospectus forming part of such
Registration Statement would include any untrue statement of a material fact or
omit to state any material fact necessary to make the statements therein in the
light of the circumstances under which they were made not misleading, or (2) it
shall be necessary to amend such Registration Statement or supplement the
related prospectus, to comply with the Securities Act or the Exchange Act or the
respective rules thereunder (such period of time during which the Registration
Statement is not effective or the Registration Statement or the related
prospectus is not useable being referred to as a "Blackout Period").

Additional Interest shall accrue on the Securities covered by the Registration
Statement to which the Registration Default relates over and above the interest
set forth in the title of such Securities from and including the date on which
any such Registration Default shall occur to but excluding the date on which all
such Registration Defaults relating to such Securities have been cured, at a
rate of 0.50% per annum (the "Additional Interest Rate").

      (b) A Blackout Period referred to in Section 6(a)(iii) shall be deemed not
to be a Registration Default in relation to a Registration Statement or the
related prospectus if (i) the Blackout Period has occurred solely as a result of
(x) the filing of a post-effective amendment to such Shelf Registration
Statement to incorporate annual audited financial information with respect to
the Issuers where such post-effective amendment is not yet effective and needs
to be declared effective to permit Holders to use the related prospectus or (y)
the occurrence of other material events with respect to the Issuers that would
need to be described in such Registration Statement or the related prospectus
and (ii) in the case of clause (y), the Issuers are proceeding promptly and in
good faith to amend or supplement (including by way of filing documents under
the Exchange Act which are incorporated by reference into the Registration
Statement) such Registration Statement and related prospectus to describe such
events; provided, however, that in any case if such Blackout Period occurs for a
continuous period in excess of 45 days, a Registration Default shall be deemed
to have occurred on the 46th day of such Blackout Period and Additional Interest
shall be payable in accordance with the above paragraph from the day such
Registration Default occurs until such Registration Default is cured or until
the Company is no longer required pursuant to this Agreement to keep such
Registration Statement effective or such Registration Statement or Prospectus
useable.

      (c) Any amounts of Additional Interest due pursuant to clause (a)(i),
(a)(ii) or (a)(iii) of Section 6 above will be payable in cash, (A) in the case
of the Senior Notes and any Private Exchange Securities exchanged therefor, on
each SemiAnnual Interest Accrual Date or Interest Payment Date (each as defined
in the applicable indenture governing such Securities), as the case may be,
commencing with the first SemiAnnual Interest Accrual Date following the
applicable Registration Default, and (B) in the case of the Equipment Notes and
any Private Exchange Securities exchanged therefor, on each Interest Payment
Date 
<PAGE>
                                                                              14


(as defined in the indenture governing such Securities), commencing with the
first such Interest Payment Date following the applicable Registration Default.
The amount of Additional Interest will be determined by multiplying the
Additional Interest Rate by, (A) in the case of the Senior Notes and any Private
Exchange Securities exchanged therefor, the Accumulated Amount (as defined in
the applicable indenture governing such Securities) of such Securities on the
relevant Additional Interest payment date and (B) in the case of the Equipment
Notes and any Private Exchange Securities exchanged therefor, the principal
amount of such Securities, in each case, multiplied by a fraction, the numerator
of which is the number of days such Additional Interest Rate was applicable
during such period (determined on the basis of a 360- day year comprised of
twelve 30-day months), and the denominator of which is 360. Payments of
Additional Interest on the Securities will be made to the Holders of such
Securities on the regular record date (or, if there is no regular record date,
the date 15 days prior to such Additional Interest payment date) immediately
preceding the relevant Additional Interest payment date .

      (d) "Transfer Restricted Securities" means each Security until (i) the
date on which such Security has been exchanged by a person other than a
broker-dealer for a freely transferrable Exchange Security in the Registered
Exchange Offer, (ii) following the exchange by a broker-dealer in a Registered
Exchange Offer of such Security for an Exchange Security, the date on which such
Exchange Security is sold to a purchaser who receives from such broker-dealer on
or prior to the date of such sale a copy of the prospectus contained in the
Exchange Offer Registration Statement, (iii) the date on which such Security has
been effectively registered under the Securities Act and disposed of in
accordance with the Shelf Registration Statement or (iv) the date on which such
Security is distributed to the public pursuant to Rule 144 under the Securities
Act or is saleable pursuant to Rule 144(k) under the Securities Act.

      7. Rules 144 and 144A. The Issuers shall use their best efforts to file
the reports required to be filed by them under the Securities Act and the
Exchange Act in a timely manner and, if at any time the Issuers are not required
to file such reports, they will, upon the request of any Holder of Transfer
Restricted Securities, make publicly available other information so long as
necessary to permit sales of their securities pursuant to Rules 144 and 144A.
The Issuers covenant that they will take such further action as any Holder of
Transfer Restricted Securities may reasonably request, all to the extent
required from time to time to enable such Holder to sell Transfer Restricted
Securities without registration under the Securities Act within the limitation
of the exemptions provided by Rules 144 and 144A (including the requirements of
Rule 144A(d)(4)). The Issuers will provide a copy of this Agreement to
prospective purchasers of Notes (or Private Exchange Securities) identified to
the Issuers by the Initial Purchasers upon request. Upon the request of any
Holder of Transfer Restricted Securities, the Issuers shall deliver to such
Holder a written statement as to whether they have complied with such
requirements. Notwithstanding the foregoing, nothing in this Section 7 shall be
deemed to require the Issuers to register any of its securities pursuant to the
Exchange Act.

      8. Underwritten Registrations. If any of the Transfer Restricted
Securities covered by any Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("Managing Underwriters") will be selected by
the Holders of a majority in aggregate principal amount of such Transfer
Restricted Securities to be included in such offering.

      No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Transfer Restricted
Securities on the basis reasonably provided in any underwriting arrangements
approved by the persons entitled hereunder to approve such arrangements and (ii)
completes and executes all questionnaires, powers of attorney, indemnities,
underwriting agreements and other 
<PAGE>
                                                                              15


documents reasonably required under the terms of such underwriting arrangements.

      9. Miscellaneous.

      (a) Amendments and Waivers. The provisions of this Agreement may not be
amended, modified or supplemented, and waivers or consents to departures from
the provisions hereof may not be given, except by the Issuers and the written
consent of the Holders of a majority in principal amount of the Securities
affected by such amendment, modification, supplement, waiver or consents.

      (b) Notices. All notices and other communications provided for or
permitted hereunder shall be made in writing by hand delivery, first-class mail,
facsimile transmission, or air courier which guarantees overnight delivery:

            (1) if to a Holder of the Securities, at the most current address
given by such Holder to the Issuers in accordance with the provisions of this
Section 9(b).

            (2)  if to the Initial Purchasers, at the following address:

                  Credit Suisse First Boston Corporation
                  Eleven Madison Avenue
                  New York, NY 10010
                  Fax No.:  (212) 318-0532
                  Attention:  Transactions Advisory Group

      with a copy to:

                  Cravath, Swaine & Moore
                  Worldwide Plaza
                  825 Eighth Avenue
                  New York, NY 10019-7475
                  Attention:  Kris F. Heinzelman

            (3)   if to the Issuers, at their address as follows:

                  WinStar Communications, Inc.
                  WinStar Equipment Corp.
                  230 Park Avenue
                  New York, NY 10169
                  Attention:  Timothy Graham

      with a copy to:

                  Graubard Mollen & Miller
                  600 Third Avenue
                  New York, NY  10016
                  Attention:  David A. Miller

      All such notices and communications shall be deemed to have been duly
given: at the time 
<PAGE>
                                       16


delivered by hand, if personally delivered; three business days after being
deposited in the mail, postage prepaid, if mailed; when receipt is acknowledged
by recipient's facsimile machine operator, if sent by facsimile transmission;
and on the day delivered, if sent by overnight air courier guaranteeing next day
delivery.

      (c) No Inconsistent Agreements. The Issuers have not, as of the date
hereof, entered into, nor shall they, on or after the date hereof, enter into,
any agreement with respect to their securities that is inconsistent with the
rights granted to the Holders herein or otherwise conflicts with the provisions
hereof.

      (d) Successors and Assigns. This Agreement shall be binding upon the
Issuers and their successors and assigns.

      (e) Counterparts. This Agreement may be executed in any number of
counterparts and by the parties hereto in separate counterparts, each of which
when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

      (f) Headings. The headings in this Agreement are for convenience of
reference only and shall not limit or otherwise affect the meaning hereof.

      (g) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES
OF CONFLICTS OF LAWS.

      (h) Severability. If any one or more of the provisions contained herein,
or the application thereof in any circumstance, is held invalid, illegal or
unenforceable, the validity, legality and enforceability of any such provision
in every other respect and of the remaining provisions contained herein shall
not be affected or impaired thereby.

      (i) Securities Held by the Issuers. Whenever the consent or approval of
Holders of a specified percentage of principal amount of Securities is required
hereunder, Securities held by the Issuers or their affiliates (other than
subsequent Holders of Securities if such subsequent Holders are deemed to be
affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.
<PAGE>
                                                                              17


      If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Issuers a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
among the several Initial Purchasers, the Issuers and the Guarantor in
accordance with its terms.

                                   Very truly yours,

                                   WINSTAR COMMUNICATIONS, INC., as an Issuer
                                   and as Guarantor


                                   By:__________________________________________
                                      Name:
                                      Title:


                                   WINSTAR EQUIPMENT CORP., as an Issuer


                                   By:__________________________________________
                                      Name:
                                      Title:

The foregoing Registration Rights
Agreement is hereby confirmed and
accepted as of the date first above
written.

CREDIT SUISSE FIRST BOSTON CORPORATION
BT SECURITIES CORPORATION

By:  CREDIT SUISSE FIRST BOSTON CORPORATION



By:__________________________________________
   Name:                                     
   Title:                                    
<PAGE>

                                                                         ANNEX A

      Each broker-dealer that receives Exchange Securities for its own account
pursuant to an Exchange Offer must acknowledge that it will deliver a prospectus
in connection with any resale of such Exchange Securities. The Letter of
Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of Exchange Securities received in exchange for Notes where such
Notes were acquired by such broker-dealer as a result of market-making
activities or other trading activities. The Issuers have agreed that, for a
period of 180 days after the Expiration Date (as defined herein), they will make
this Prospectus available to any broker-dealer for use in connection with any
such resale. See "Plan of Distribution."


                                       A-1
<PAGE>

                                                                         ANNEX B

      Each broker-dealer that receives Exchange Securities for its own account
in exchange for Notes, where such Notes were acquired by such broker-dealer as a
result of market-making activities or other trading activities, must acknowledge
that it will deliver a prospectus in connection with any resale of such Exchange
Securities. See "Plan of Distribution."


                                       B-1
<PAGE>

                                                                         ANNEX C

PLAN OF DISTRIBUTION

      Each broker-dealer that receives Exchange Securities for its own account
pursuant to an Exchange Offer must acknowledge that it will deliver a prospectus
in connection with any resale of such Exchange Securities. This Prospectus, as
it may be amended or supplemented from time to time, may be used by a
broker-dealer in connection with resales of Exchange Securities received in
exchange for Notes where such Notes were acquired as a result of market-making
activities or other trading activities. The Issuers have agreed that, for a
period of 180 days after the Expiration Date, it will make this prospectus, as
amended or supplemented, available to any broker-dealer for use in connection
with any such resale. In addition, until , 199 , all dealers effecting
transactions in the Exchange Securities may be required to deliver a
prospectus.1

      The Issuers will not receive any proceeds from any sale of Exchange
Securities by broker-dealers. Exchange Securities received by broker-dealers for
their own account pursuant to an Exchange Offer may be sold from time to time in
one or more transactions in the over-the-counter market, in negotiated
transactions, through the writing of options on the Exchange Securities or a
combination of such methods of resale, at market prices prevailing at the time
of resale, at prices related to such prevailing market prices or negotiated
prices. Any such resale may be made directly to purchasers or to or through
brokers or dealers who may receive compensation in the form of commissions or
concessions from any such broker-dealer or the purchasers of any such Exchange
Securities. Any broker-dealer that resells Exchange Securities that were
received by it for its own account pursuant to an Exchange Offer and any broker
or dealer that participates in a distribution of such Exchange Securities may be
deemed to be an "underwriter" within the meaning of the Securities Act and any
profit on any such resale of Exchange Securities and any commission or
concessions received by any such persons may be deemed to be underwriting
compensation under the Securities Act. The Letter of Transmittal states that, by
acknowledging that it will deliver and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

      For a period of 180 days after the Expiration Date the Issuers will
promptly send additional copies of this Prospectus and any amendment or
supplement to this Prospectus to any broker-dealer that requests such documents
in the Letter of Transmittal. WinStar has agreed to pay all expenses incidental
to the Exchange Offers (including the reasonable expenses of one counsel for the
Holders of the Securities) other than commissions or concessions of any brokers
or dealers and will indemnify the Holders of the Securities (including any
broker-dealers) against certain liabilities, including liabilities under the
Securities Act.

- --------
1 In addition, the legend required by Item 502(e) of Regulation S-K will appear
on the back cover page of the Exchange Offer prospectus.


                                       C-1
<PAGE>

                                                                         ANNEX D

|_|   CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10
      ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS
      OR SUPPLEMENTS THERETO.

            Name:_______________________________________________________________

            Address:____________________________________________________________

            ____________________________________________________________________

If the undersigned is not a broker-dealer, the undersigned represents that it is
not engaged in, and does not intend to engage in, a distribution of Exchange
Securities. If the undersigned is a broker-dealer that will receive Exchange
Securities for its own account in exchange for Notes that were acquired as a
result of market-making activities or other trading activities, it acknowledges
that it will deliver a prospectus in connection with any resale of such Exchange
Securities; however, by so acknowledging and by delivering a prospectus, the
undersigned will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.


                                       D-1
<PAGE>



                                                                  EXECUTION COPY

                        SECURITY AGREEMENT dated as of March 1, 1997, between
                  WINSTAR EQUIPMENT CORP., a Delaware corporation (the
                  "Grantor"), and UNITED STATES TRUST COMPANY OF NEW YORK, a New
                  York banking corporation ("U.S. Trust"), as collateral agent
                  (in such capacity, the "Collateral Agent") for the Secured
                  Parties (as defined herein).

      Reference is made to the Indenture dated as of March 1, 1997 (as amended,
supplemented or otherwise modified from time to time, the "Indenture"), among
the Grantor, WinStar Communications, Inc., as guarantor (the "Guarantor") and
U.S. Trust, as trustee (in such capacity, the "Trustee").

      On the date hereof, (i) the Grantor has issued $200,000,000 12 1/2%
Guaranteed Senior Secured Notes Due 2004 ("Notes") to various Initial Purchasers
(as defined in the Indenture) and such Initial Purchasers have agreed to resell
the Notes to various Holders thereof and (ii) the Guarantor has agreed to
guarantee the Notes on a senior unsecured basis, each pursuant to, and upon the
terms and subject to the conditions specified in, the Indenture. The Indenture
requires, among other things, the execution and delivery by the Grantor of an
agreement in the form hereof to secure (a) the due and punctual payment by the
Grantor of (i) the principal of and premium, if any, and interest (including
interest accruing during the pendency of any bankruptcy, insolvency,
receivership or other similar proceeding, regardless of whether allowed or
allowable in such proceeding) on the Notes, when and as due, whether at
maturity, by acceleration, upon one or more dates set for redemption or
otherwise, (ii) each payment required to be made by any obligor under the
Indenture in respect of any Note, when and as due, including payments in respect
of reimbursement of disbursements and interest thereon, and (iii) all other
monetary obligations, including fees, costs, expenses and indemnities, whether
primary, secondary, direct, contingent, fixed or otherwise (including monetary
obligations incurred during the pendency of any bankruptcy, insolvency,
receivership or other similar proceeding, regardless of whether allowed or
allowable in such proceeding), of any obligor to the Secured Parties under the
Indenture and the other Security Documents and (b) the due and punctual
performance of all covenants, agreements, obligations and liabilities of the
obligors under or pursuant to the Indenture and the other Security Documents
(all the monetary and other obligations described in the preceding clauses (a)
and (b) being collectively called the "Obligations").

      Accordingly, the Grantor, the Collateral Agent, on behalf of itself and
each Secured Party, and each of their respective successors or assigns, hereby
agree as follows:

                                  ARTICLE I

                                 Definitions

      SECTION 1.01. Definition of Terms Used Herein. Unless the context
otherwise requires, all capitalized terms used but not defined herein shall have
the meanings set forth in the Indenture.

     SECTION 1.02. Definition of Certain Terms Used Herein. As used herein, the
following terms shall have the following meanings:

      "Collateral" shall mean (i) all Designated Equipment acquired by the
Grantor pursuant to Section 4.21 of the Indenture; (ii) the Proceeds of any sale
or other disposition (other than leases in the
<PAGE>
                                                                               2


ordinary course of business, as provided in Section 5.01(a) hereof) of such
Designated Equipment (including any insurance proceeds from the loss or
destruction of such Designated Equipment); and (iii) any additional Designated
Equipment acquired by the Grantor with the Proceeds of any such sale or other
disposition of Designated Equipment.

      "Designated Equipment" shall mean (i) telecommunications switches and
related equipment and inventory; (ii) customer premise equipment; (iii) radios,
antennae and cabling; (iv) office and warehouse furniture, fixtures and
equipment (including without limitation, computers and communications
equipment); (v) company service vehicles; and (vi) software related to each of
the foregoing, in each case used in the telecommunications business of the
Guarantor and its subsidiaries.

      "Indenture" shall have the meaning assigned to such term in the
preliminary statement of this Agreement.

      "Holder" shall mean the person in whose name a Note is registered on the
books of the registrar.

      "Obligations" shall have the meaning assigned to such term in the
preliminary statement of this Agreement.

      "Proceeds" shall mean any consideration received from the sale, exchange,
license, lease (other than consideration received solely from the lease of
Designated Equipment in the ordinary course of business) or other disposition of
any asset or property that constitutes Collateral, any value received as a
consequence of the possession of any Collateral and any payment received from
any insurer or other person or entity as a result of the destruction, loss,
theft, damage or other involuntary conversion of whatever nature of any asset or
property that constitutes Collateral, and shall include all cash and negotiable
instruments received or held on behalf of the Collateral Agent and any and all
other amounts from time to time paid or payable under or in connection with any
of the Collateral.

      "Secured Parties" shall mean (a) the Holders, (b) the Trustee, (c) the
Collateral Agent, (d) the beneficiaries of each indemnification obligation
undertaken by the Grantor under any Security Document and (e) the permitted
successors and assigns of each of the foregoing.

      "Security Interest" shall have the meaning assigned to such term in
Section 2.01.

      "Status Certificate" shall mean a certificate substantially in the form of
Annex 1, completed and supplemented with the schedules and attachments
contemplated thereby, and duly executed by two executive officers of the
Grantor.

      SECTION 1.03. Rules of Construction. The rules of construction specified
in Section 1.03 of the Indenture shall be applicable to this Agreement.
<PAGE>
                                                                               3


                                 ARTICLE II

                              Security Interest

      SECTION 2.01. Security Interest. As security for the payment or
performance, as the case may be, in full of the Obligations, the Grantor hereby
bargains, sells, conveys, assigns, sets over, pledges, hypothecates and
transfers to the Collateral Agent, its successors and assigns, for the ratable
benefit of the Secured Parties, and hereby grants to the Collateral Agent, its
successors and assigns, for the ratable benefit of the Secured Parties, a
security interest in all of the Grantor's right, title and interest in, to and
under the Collateral (the "Security Interest"). In furtherance of such Security
Interest, and pursuant to Sections 4.22 and 4.23 of the Indenture, the Grantor
has filed fully executed Uniform Commercial Code financing statements with the
Secretary of State of all 50 states of the United States, or, where a state does
not provide for filing with the Security of State thereof, in another
appropriate filing office, as more fully described in Section 3.02 hereof.
Without limiting the foregoing, the Collateral Agent also is hereby authorized
to file one or more financing statements, continuation statements or other
documents for the purpose of perfecting, confirming, continuing, enforcing or
protecting the Security Interest granted by the Grantor, without the signature
of the Grantor, naming the Grantor as debtor and the Collateral Agent as secured
party. The Collateral Agent shall furnish the Grantor with copies of any such
statements and other documents so filed.

      SECTION 2.02. No Assumption of Liability. The Security Interest is granted
as security only and shall not subject the Collateral Agent or any other Secured
Party to, or in any way alter or modify, any obligation or liability of the
Grantor with respect to or arising out of the Collateral.

                                 ARTICLE III

                       Representations and Warranties

      The Grantor represents and warrants to the Collateral Agent and the
Holders that:

      SECTION 3.01. Title and Authority. The Grantor has good and valid rights
in and title to the Collateral that it has purported to grant a Security
Interest in hereunder and has full power and authority to grant to the
Collateral Agent the Security Interest in such Collateral pursuant hereto and to
execute, deliver and perform its obligations in accordance with the terms of
this Agreement, without the consent or approval of any other person other than
any consent or approval which has been obtained.

      SECTION 3.02. Filings. The Status Certificate has been duly prepared,
completed and executed and the information set forth therein is correct and
complete. Fully executed Uniform Commercial Code financing statements (UCC-1's)
or other appropriate filings, recordings or registrations containing a
description of the Collateral have been filed with the Secretary of State or
other appropriate office of all 50 states of the United States and in such other
governmental, municipal or other office specified in Schedule 5 to each Status
Certificate (with copies delivered to the Collateral Agent).

      SECTION 3.03. Validity of Security Interest. The Security Interest
constitutes a legal and valid security interest in all the Collateral securing
the payment and performance of the Obligations, subject to any requirements
regarding attachment. The Security Interest in the Collateral will be perfected
only to the extent that the filings referred to in Section 3.02 are sufficient
to perfect such Security Interest. The Security Interest is prior to any other
Lien on any of the Collateral on the date hereof.
<PAGE>
                                                                               4


      SECTION 3.04. Absence of Other Liens. The Collateral is owned by the
Grantor free and clear of any Lien. The Grantor has not filed or consented to
the filing of any financing statement or analogous document under the Uniform
Commercial Code or any other applicable laws covering any Collateral and which
financing statement or analogous document is still in effect, except for the
Liens and financing statements expressly created or permitted by this Agreement
or the Indenture.

                                 ARTICLE IV

                                  Covenants

      SECTION 4.01. Change of Name; Location of Collateral; Records; Place of
Business. (a) The Grantor agrees promptly to notify the Collateral Agent of any
change (i) in its corporate name or in any trade name used to identify it in the
conduct of its business or in the ownership of its properties, (ii) in the
location of its chief executive office, its principal place of business, any
office in which it maintains books or records relating to Collateral owned by it
or any office or facility at which Collateral owned by it is located (including
the establishment of any such new office or facility), (iii) in its identity or
corporate structure or (iv) in its Federal Taxpayer Identification Number. The
Grantor agrees to notify the Collateral Agent, as soon as practicable after an
executive officer of the Grantor learns thereof, if any material portion of the
Collateral owned or held by the Grantor is damaged or destroyed.

      (b) The Grantor agrees to maintain, at its own cost and expense, such
complete and accurate records with respect to the Collateral owned or held by it
as is consistent with its current practices and in accordance with such prudent
and standard practices used in industries that are the same as or similar to
those in which the Grantor is engaged, but in any event to include complete
accounting records indicating all payments and proceeds received with respect to
any part of the Collateral, and, at such time or times as the Collateral Agent
may reasonably request, promptly to prepare and deliver to the Collateral Agent
a duly certified schedule or schedules in form and detail reasonably
satisfactory to the Collateral Agent showing the identity, amount and location
of any and all Collateral.

      SECTION 4.02. Protection of Security. The Grantor shall, at its own cost
and expense, take any and all actions reasonably necessary to defend title to
the Collateral against all persons.

      SECTION 4.03. Continuation Statements. The Grantor agrees, at its expense,
to execute, acknowledge, deliver and cause to be duly filed all such
continuation statements on Form UCC-3 as to maintain in effect the financing
statements filed pursuant to Section 3.02, and to take all such actions as the
Collateral Agent may from time to time reasonably request to preserve the
Security Interest, including the payment of any fees and taxes required in
connection with the execution and delivery of this Agreement, the granting of
the Security Interest and the filing of any financing statements or other
documents in connection herewith.

      SECTION 4.04. Inspection and Verification. The Collateral Agent and such
persons as the Collateral Agent may reasonably designate shall have the right,
at the Grantor's own cost and expense, to inspect the Collateral, all records
related thereto (and to make extracts and copies from such records) and the
premises upon which any of the Collateral is located, where such premises is
within the control of the Grantor or any affiliate of the Grantor, to discuss
the Grantor's affairs with the officers of the Grantor and its independent
accountants and to verify under reasonable procedures the validity, amount,
quality, quantity,
<PAGE>
                                                                               5


value, condition and status of, or any other matter relating to, the Collateral,
including, in the case of Collateral in the possession of any third person, by
contacting the third party possessing such Collateral (after two days' notice to
the Grantor) for the purpose of making such a verification. Where the premises
upon which any of the Collateral is located are not within the control of the
Grantor, Grantor shall reasonably request such person(s) controlling such
premises to allow the Collateral Agent and its designees to inspect such
premises for the purposes, and subject to the limitations, of the foregoing
sentence. The Collateral Agent shall have the absolute right to share any
information it gains from such inspection or verification with any Secured
Party.

      SECTION 4.05. Taxes; Encumbrances. At its option, upon not less than 10
days' prior written notice to the Grantor, the Collateral Agent may discharge
past due taxes, assessments, charges, fees, liens, security interests or other
encumbrances at any time levied or placed on the Collateral and not permitted
under the Indenture, and may pay for the maintenance and preservation of the
Collateral to the extent the Grantor fails to do so as required by the Indenture
or this Agreement, and the Grantor agrees to reimburse the Collateral Agent on
demand for any reasonable payment or other expenses incurred by the Collateral
Agent pursuant to the foregoing authorization; provided, however, that nothing
in this Section shall be interpreted as excusing the Grantor from the
performance of, or imposing any obligation on the Collateral Agent or any
Secured Party to cure or perform, any covenants or other promises of the Grantor
with respect to taxes, assessments, charges, fees, liens, security interests or
other encumbrances and maintenance as set forth herein or in the other Security
Documents.

      SECTION 4.06. Continuing Obligations of the Grantor. The Grantor shall
remain liable to observe and perform all the conditions and obligations to be
observed and performed by it under each contract, agreement or instrument
relating to the Collateral, including Sections 4.22 and 4.23 of the Indenture,
all in accordance with the terms and conditions thereof, and the Grantor agrees
to indemnify and hold harmless the Collateral Agent and the Secured Parties from
and against any and all liability for such performance.

      SECTION 4.07. Insurance. (a) The Grantor, at its own expense, shall
maintain or cause to be maintained insurance covering physical loss or damage to
the Designated Equipment, including without limitation such insurance as is
required pursuant to Section 4.15 of the Indenture.

      (b) In the event that the Grantor at any time or times shall fail to
obtain or maintain any of the policies of insurance required hereby or to pay
any premium in whole or part relating thereto, the Collateral Agent may, without
waiving or releasing any obligation or liability of the Grantor hereunder or any
Event of Default, in its sole discretion, obtain and maintain such policies of
insurance and pay such premium and take any other actions with respect thereto
as the Collateral Agent deems advisable. All sums disbursed by the Collateral
Agent in connection with this Section, including reasonable attorneys' fees,
court costs, expenses and other charges relating thereto, shall be payable, upon
demand, by the Grantor to the Collateral Agent and shall be additional
Obligations secured hereby.

      SECTION 4.08. Posting of Notices. The Grantor shall, with respect to any
telecommunications switch that constitutes Designated Equipment acquired by the
Grantor pursuant to Section 4.21 of the Indenture, post a notice on, or in the
location housing, such telecommunications switch, identifying the Grantor as the
owner of the telecommunications switch and stating that such telecommunication
switch is subject to the Security Interest under the Indenture and the Security
Documents.
<PAGE>
                                                                               6


      SECTION 4.09. FCC Approvals. Notwithstanding anything to the contrary set
forth herein, the Grantor agrees that to the extent prior FCC approval is
required pursuant to the Communications Act of 1934, as amended, for (i) the
operation and effectiveness of any grant, right or remedy hereunder or under the
Indenture or (ii) taking any action that may be taken by the Collateral Agent
hereunder or under the Indenture, such grant, right, remedy or actions will be
subject to such prior Federal Communications Commission ("FCC") approval having
been obtained by or in favor of the Collateral Agent, on behalf of the Secured
Parties (and Grantor will use its best efforts to obtain any such approval as
promptly as possible). Grantor agrees that, upon and during the continuance of
an Event of Default and at Collateral Agent's request, Grantor will, and will
cause its subsidiaries to, immediately file, or cause to be filed, such
applications for approval and shall take all other and further actions required
by the Collateral Agent, on behalf of the Secured Parties, to obtain such
governmental authorizations, including FCC authorizations, as are necessary to
transfer ownership and control to the Collateral Agent, on behalf of the Secured
Parties, or their successors or assigns, of the Collateral held by it or its
subsidiaries, or its interest in any Person holding any such Collateral.

                                  ARTICLE V

                      Transfer and Sales of Collateral

      SECTION 5.01. Transfer and Sales of Collateral. (a) Grantor shall not,
except as permitted by the terms of the Indenture from time to time in effect
(including without limitation Sections 4.11, 4.23 and 11.02 thereof), sell,
assign (by operation of law or otherwise) or otherwise dispose of any of the
Collateral. For the avoidance of doubt, Grantor may lease Designated Equipment
in the ordinary course of business without such lease constituting a sale,
assignment or other disposition prohibited by the preceding sentence, and any
consideration received by Grantor in respect of any such lease shall not be
subject to a security interest under the Security Documents.

      (b) As long as no Event of Default shall have occurred and be continuing,
and no event which, with the lapse of time or after notice, would become an
Event of Default shall have occurred and be continuing, Grantor shall be
entitled from time to time to request the Collateral Agent to release all or a
portion of the Collateral owned by it and subject to this Agreement; provided,
however, that such request must be in writing and accompanied by an Officers'
Certificate of Grantor and an Opinion of Counsel to Grantor (which counsel shall
be reasonably satisfactory to the Collateral Agent) stating that all conditions
precedent to the release of such Collateral pursuant to this Article V and the
Indenture have been complied with. Upon satisfaction of the conditions in this
Article V and the Indenture, the Lien of this Agreement on all Collateral to be
released without any further action on the part of the Collateral Agent or any
other person. In furtherance of the foregoing, the Collateral Agent shall
execute and deliver to Grantor an instrument or instruments acknowledging the
release of such Collateral from this Agreement and the discharge of the Lien on
such Collateral created by this Agreement, and will duly assign, transfer and
deliver to Grantor (without recourse and without any representation or warranty)
such Collateral to be released.

      (c) No Collateral shall be released from the Lien of this Agreement
pursuant to any request described in paragraph (b) above unless (i) as promptly
as is practicable thereafter, the Grantor shall sell such Collateral, (ii) as
promptly as is practicable thereafter, the Grantor deposits with the Collateral
Agent cash or cash equivalents, if any, representing the Net Cash Proceeds from
the sale of such Collateral; and (iii) Grantor delivers to the Collateral Agent
an Officers' Certificate and an Opinion of Counsel to the effect
<PAGE>
                                                                               7


that all conditions precedent contained in the Indenture to the sale and release
of such Collateral shall have been satisfied in full. On or after deposit of the
sums described in clause (ii) of this paragraph (c), Grantor shall be entitled
thereafter to request release of such cash proceeds at such times and in such
amounts in order to, and only to the extent necessary to, comply with its
obligations under, or otherwise in accordance with, the Indenture, including
without limitation its obligation to acquire additional Designated Equipment
within 45 days pursuant to Section 4.11 thereof, as a result of the disposition
of such Collateral. Such releases of Net Cash Proceeds shall not be made until
and unless Grantor shall have delivered an Officers' Certificate and an Opinion
of Counsel to the Collateral Agent stating that all conditions precedent to such
release set forth in the Indenture shall have been satisfied.

      (d) The release of any Collateral from the terms hereof and of the other
Security Documents or the release of, in whole or in part, the Liens created by
the Security Documents, will not be deemed to impair the Lien on the Collateral
in contravention of the provisions of the Indenture if and to the extent the
Collateral or Liens are released pursuant to the applicable Security Documents
and pursuant to the terms of the Indenture. Each of the Secured Parties
acknowledge that a release of Collateral strictly in accordance with the terms
of the Security Documents and of the Indenture will not be deemed for any
purpose to be an impairment of the Lien on the Collateral in contravention of
the terms of the Indenture. To the extent applicable, Grantor and each obligor
on the Securities shall cause ss. 314(d) of the Trust Indenture Act of 1939
("TIA") relating to the release of property or securities from the Lien of the
Security Documents and of the Indenture to be complied with. Any certificate or
opinion required by ss. 314(d) of the TIA may be made by an officer of Grantor,
except in cases which ss. 314(d) of the TIA required that such certificate or
opinion be made by an independent person.

                                 ARTICLE VI

                              Power of Attorney

      SECTION 6.01. Power of Attorney. The Grantor irrevocably makes,
constitutes and appoints the Collateral Agent (and all officers, employees or
agents designated by the Collateral Agent) as the Grantor's true and lawful
agent and attorney-in-fact, and in such capacity the Collateral Agent shall have
the right, with power of substitution for the Grantor and in the Grantor's name
or otherwise, for the use and benefit of the Collateral Agent and the Secured
Parties, upon the occurrence and during the continuance of an Event of Default
(a) to receive, endorse, assign and/or deliver any and all notes, acceptances,
checks, drafts, money orders or other evidences of payment relating to the
Collateral or any part thereof; (b) to demand, collect, receive payment of, give
receipt for and give discharges and releases of all or any of the Collateral;
(c) to sign the name of the Grantor on any invoice or bill of lading relating to
any of the Collateral; (d) to commence and prosecute any and all suits, actions
or proceedings at law or in equity in any court of competent jurisdiction to
collect or otherwise realize on all or any of the Collateral or to enforce any
rights in respect of any Collateral; (e) to settle, compromise, compound, adjust
or defend any actions, suits or proceedings relating to all or any of the
Collateral; (f) to notify, or to require the Grantor to notify third parties to
make payment directly to the Collateral Agent; and (g) to use, sell, assign,
transfer, pledge, make any agreement with respect to or otherwise deal with all
or any of the Collateral, and to do all other acts and things necessary to carry
out the purposes of this Agreement, as fully and completely as though the
Collateral Agent were the absolute owner of the Collateral for all purposes;
provided, however, that nothing herein contained shall be construed as requiring
or obligating the Collateral Agent or any Secured Party to make any commitment
or to make any inquiry as to the nature or sufficiency of any payment received
by the
<PAGE>
                                                                               8


Collateral Agent or any Secured Party, or to present or file any claim or
notice, or to take any action with respect to the Collateral or any part thereof
or the moneys due or to become due in respect thereof or any property covered
thereby, and no action taken or omitted to be taken by the Collateral Agent or
any Secured Party with respect to the Collateral or any part thereof shall give
rise to any defense, counterclaim or offset in favor of the Grantor or to any
claim or action against the Collateral Agent or any Secured Party. It is
understood and agreed that the appointment of the Collateral Agent as the agent
and attorney-in-fact of the Grantor for the purposes set forth above is coupled
with an interest and is irrevocable. The provisions of this Section shall in no
event relieve the Grantor of any of its obligations hereunder or under the
Indenture with respect to the Collateral or any part thereof or impose any
obligation on the Collateral Agent or any Secured Party to proceed in any
particular manner with respect to the Collateral or any part thereof, or in any
way limit the exercise by the Collateral Agent or any Secured Party of any other
or further right which it may have on the date of this Agreement or hereafter,
whether hereunder, under any other Security Document, by law or otherwise.

                                 ARTICLE VII

                                  Remedies

      SECTION 7.01. Remedies upon Default. Upon the occurrence and during the
continuance of an Event of Default, the Grantor agrees to deliver each item of
Collateral to the Collateral Agent on demand, and it is agreed that the
Collateral Agent shall have the right (subject to applicable law) to take any of
or all the following actions at the same or different times: with or without
legal process and with or without previous notice or demand for performance, to
take possession of the Collateral and without liability for trespass to enter
any premises where the Collateral may be located for the purpose of taking
possession of or removing the Collateral and, generally, to exercise any and all
rights afforded to a secured party under the Uniform Commercial Code or other
applicable law. Without limiting the generality of the foregoing, the Grantor
agrees that the Collateral Agent shall have the right, subject to the mandatory
requirements of applicable law, to sell or otherwise dispose of all or any part
of the Collateral, at public or private sale, for cash, upon credit or for
future delivery as the Collateral Agent shall deem appropriate. Each such
purchaser at any such sale shall hold the property sold absolutely, free from
any claim or right on the part of the Grantor, and the Grantor hereby waives (to
the extent permitted by law) all rights of redemption, stay and appraisal which
the Grantor now has or may at any time in the future have under any rule of law
or statute now existing or hereafter enacted.

      The Collateral Agent shall give the Grantor 15 days' written notice (which
the Grantor agrees is reasonable notice within the meaning of Section 9-504(3)
of the Uniform Commercial Code as in effect in the State of New York or its
equivalent in other jurisdictions) of the Collateral Agent's intention to make
any sale of Collateral. Such notice, in the case of a public sale, shall state
the time and place for such sale. Any such public sale shall be held at such
time or times within ordinary business hours and at such place or places as the
Collateral Agent may fix and state in the notice (if any) of such sale. At any
such sale, the Collateral, or portion thereof, to be sold may be sold in one lot
as an entirety or in separate parcels, as the Collateral Agent may (in its sole
and absolute discretion) determine. The Collateral Agent shall not be obligated
to make any sale of any Collateral if it shall determine not to do so,
regardless of the fact that notice of sale of such Collateral shall have been
given. The Collateral Agent may, without notice or publication, adjourn any
public or private sale or cause the same to be adjourned from time to time by
announcement at the time and place fixed for sale, and such sale may, without
further notice, be made at the time and place to which the same was so
adjourned. In case any sale of all or any part of the Collateral is made on
credit or for future delivery, the Collateral so sold may be retained by the
Collateral Agent until the sale price is paid by
<PAGE>
                                                                               9


the purchaser or purchasers thereof, but the Collateral Agent shall not incur
any liability in case any such purchaser or purchasers shall fail to take up and
pay for the Collateral so sold and, in case of any such failure, such Collateral
may be sold again upon like notice. At any public sale made pursuant to this
Section, any Secured Party may bid for or purchase, free (to the extent
permitted by law) from any right of redemption, stay, valuation or appraisal on
the part of the Grantor (all said rights being also hereby waived and released
to the extent permitted by law), the Collateral or any part thereof offered for
sale and may make payment on account thereof by using any claim then due and
payable to such Secured Party from the Grantor as a credit against the purchase
price, and such Secured Party may, upon compliance with the terms of sale, hold,
retain and dispose of such property without further accountability to the
Grantor therefor. For purposes hereof, a written agreement to purchase the
Collateral or any portion thereof shall be treated as a sale thereof; the
Collateral Agent shall be free to carry out such sale pursuant to such agreement
and the Grantor shall not be entitled to the return of the Collateral or any
portion thereof subject thereto, notwithstanding the fact that after the
Collateral Agent shall have entered into such an agreement all Events of Default
shall have been remedied and the Obligations paid in full. As an alternative to
exercising the power of sale herein conferred upon it, the Collateral Agent may
proceed by a suit or suits at law or in equity to foreclose this Agreement and
to sell the Collateral or any portion thereof pursuant to a judgment or decree
of a court or courts having competent jurisdiction or pursuant to a proceeding
by a court-appointed receiver.

      SECTION 7.02. Application of Proceeds. The Collateral Agent shall apply
the proceeds of any collection or sale of the Collateral, as well as any
Collateral consisting of cash, as follows:

            FIRST, to the payment of all costs and expenses incurred by the
      Trustee or the Collateral Agent (in its capacity as such hereunder or
      under any other Security Document) in connection with such collection or
      sale or otherwise in connection with this Agreement or any of the
      Obligations, including all court costs and the reasonable fees and
      expenses of its agents and legal counsel, the repayment of all advances
      made by the Collateral Agent hereunder or under any other Security
      Document on behalf of the Grantor and any other costs or expenses incurred
      in connection with the exercise of any right or remedy hereunder or under
      any other Security Document;

            SECOND, to the payment of the fees and expenses of the Secured
      Parties on an equal and ratable basis;

            THIRD, to the payment of interest on and fees, if any, with respect
      to the Obligations on an equal and ratable basis;

            FOURTH, to the payment of the unpaid principal amount of the
      Obligations on an equal and ratable basis;

            FIFTH, to the payment of costs and expenses of, all premiums on, and
      all other amounts due with respect to, the Obligations on an equal and
      ratable basis; and

            SIXTH, to the Grantor, its successors or assigns, or as a court of
      competent jurisdiction may otherwise direct.

The Collateral Agent shall have absolute discretion as to the time of
application of any such proceeds, moneys or balances in accordance with this
Agreement. Upon any sale of the Collateral by the Collateral Agent (including
pursuant to a power of sale granted by statute or under a judicial proceeding),
the receipt of the Collateral Agent or of the officer making the sale shall be a
sufficient discharge to the purchaser or purchasers of the Collateral so sold
and such purchaser or purchasers shall not be obligated to see to the
<PAGE>
                                                                              10


application of any part of the purchase money paid over to the Collateral Agent
or such officer or be answerable in any way for the misapplication thereof.

                                ARTICLE VIII

                                Miscellaneous

      SECTION 8.01. Notices. All communications and notices hereunder shall
(except as otherwise expressly permitted herein) be in writing and given as
provided in Section 12.02 of the Indenture.

      SECTION 8.02. Security Interest Absolute. All rights of the Collateral
Agent hereunder, the Security Interest and all obligations of the Grantor
hereunder shall be absolute and unconditional irrespective of (a) any lack of
validity or enforceability of the Indenture or any other Security Document, any
agreement with respect to any of the Obligations or any other agreement or
instrument relating to any of the foregoing, (b) any change in the time, manner
or place of payment of, or in any other term of, all or any of the Obligations,
or any other amendment or waiver of or any consent to any departure from the
Indenture, any other Security Document or any other agreement or instrument, (c)
any exchange, release or non-perfection of any Lien on other collateral, or any
release or amendment or waiver of or consent under or departure from any
guarantee, securing or guaranteeing all or any of the Obligations, or (d) any
other circumstance which might otherwise constitute a defense available to, or a
discharge of, the Grantor in respect of the Obligations or this Agreement.

      SECTION 8.03. Survival of Agreement. All covenants, agreements,
representations and warranties made by the Grantor herein and in the
certificates or other instruments prepared or delivered in connection with or
pursuant to this Agreement or any other Security Document shall be considered to
have been relied upon by the Holders, regardless of any investigation made by
the Holders or on their behalf, and shall continue in full force and effect
until this Agreement shall terminate.

      SECTION 8.04. Binding Effect; Several Agreement. This Agreement shall
become effective as to the Grantor when a counterpart hereof executed on behalf
of the Grantor shall have been delivered to the Collateral Agent and a
counterpart hereof shall have been executed on behalf of the Collateral Agent,
and thereafter shall be binding upon the Grantor and the Collateral Agent and
their respective successors and assigns, and shall inure to the benefit of the
Grantor, the Collateral Agent and the other Secured Parties and their respective
successors and assigns, except that the Grantor shall not have the right to
assign its rights hereunder or any interest herein or in the Collateral except
as expressly contemplated by this Agreement or the Indenture.

      SECTION 8.05. Successors and Assigns. Whenever in this Agreement any of
the parties hereto is referred to, such reference shall be deemed to include the
successors and assigns of such party; and all covenants, promises and agreements
by or on behalf of the Grantor or the Collateral Agent that are contained in
this Agreement shall bind and inure to the benefit of their respective
successors and assigns.

      SECTION 8.06. Collateral Agent's Fees and Expenses; Indemnification. (a)
The Grantor agrees to pay upon demand to the Collateral Agent the amount of any
and all reasonable expenses, including the reasonable fees, disbursements and
other charges of its counsel and of any experts or agents, which the Collateral
Agent may incur in connection with (i) the administration of this Agreement
(including the customary fees of the Collateral Agent for any ongoing monitoring
or audits conducted by it with respect to
<PAGE>
                                                                              11


the Collateral), (ii) the custody or preservation of, or the sale of, collection
from or other realization upon any of the Collateral, (iii) the exercise,
enforcement or protection of any of the rights of the Collateral Agent hereunder
or (iv) the failure of the Grantor to perform or observe any of the provisions
hereof.

      (b) Without limitation of its indemnification obligations under the other
Security Documents, the Grantor jointly and severally agrees to indemnify the
Collateral Agent and the other Secured Parties (collectively, "Indemnitees")
against, and hold each of them harmless from, any and all losses, claims,
damages, liabilities and related expenses, including reasonable fees,
disbursements and other charges of counsel, incurred by or asserted against any
of them arising out of, in any way connected with, or as a result of, the
execution, delivery or performance of this Agreement or any claim, litigation,
investigation or proceeding relating hereto or to the Collateral, whether or not
any Indemnitee is a party thereto; provided that such indemnity shall not, as to
any Indemnitee, be available to the extent that such losses, claims, damages,
liabilities or related expenses are determined by a court of competent
jurisdiction by final and nonappealable judgment to have resulted from the gross
negligence or willful misconduct of such Indemnitee.


      (c) Any such amounts payable as provided hereunder shall be additional
Obligations secured hereby. The provisions of this Section shall remain
operative and in full force and effect regardless of the termination of this
Agreement, the consummation of the transactions contemplated hereby, the
repayment of any of the Notes, the invalidity or unenforceability of any term or
provision of this Agreement or any other Security Document, or any investigation
made by or on behalf of the Collateral Agent or any Holder. All amounts due
under this Section shall be payable on written demand therefor.

      SECTION 8.07. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY THE LAWS
OF THE STATE OF NEW YORK, EXCLUDING (TO THE EXTENT PERMISSIBLE BY LAW) ANY RULE
OF LAW THAT WOULD CAUSE THE APPLICATION OF THE LAWS OF ANY JURISDICTION OTHER
THAN THE STATE OF NEW YORK.

      SECTION 8.08. Waivers; Amendment. (a) No failure or delay of the
Collateral Agent in exercising any power or right hereunder shall operate as a
waiver thereof, nor shall any single or partial exercise of any such right or
power, or any abandonment or discontinuance of steps to enforce such a right or
power, preclude any other or further exercise thereof or the exercise of any
other right or power. The rights and remedies of the Collateral Agent hereunder
and of the Collateral Agent, the Trustee and the Holders under the other
Security Documents are cumulative and are not exclusive of any rights or
remedies which they would otherwise have. No waiver of any provisions of this
Agreement or any other Security Document or consent to any departure by the
Grantor therefrom shall in any event be effective unless the same shall be
permitted by paragraph (b) below, and then such waiver or consent shall be
effective only in the specific instance and for the purpose for which given. No
notice or demand on the Grantor in any case shall entitle the Grantor to any
other or further notice or demand in similar or other circumstances.

      (b) Neither this Agreement nor any provision hereof may be waived, amended
or modified except pursuant to an agreement or agreements in writing entered
into by the Collateral Agent and the Grantor with respect to which such waiver,
amendment or modification is to apply, subject to any consent required in
accordance with Section 9.02 of the Indenture.

      SECTION 8.09.  WAIVER OF JURY TRIAL.  EACH PARTY HERETO HEREBY WAIVES, TO
THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A
TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT
<PAGE>
                                                                              12


OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY OF THE OTHER SECURITY
DOCUMENTS. EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR
ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH
OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING
WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN
INDUCED TO ENTER INTO THIS AGREEMENT AND THE OTHER SECURITY DOCUMENTS, AS
APPLICABLE, BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN
THIS SECTION.

      SECTION 8.10. Severability. In the event any one or more of the provisions
contained in this Agreement or in any other Security Document should be held
invalid, illegal or unenforceable in any respect, the validity, legality and
enforceability of the remaining provisions contained herein and therein shall
not in any way be affected or impaired thereby. The parties shall endeavor in
good-faith negotiations to replace the invalid, illegal or unenforceable
provisions with valid provisions the economic effect of which comes as close as
possible to that of the invalid, illegal or unenforceable provisions.

      SECTION 8.11. Counterparts. This Agreement may be executed in counterparts
(and by different parties hereto on different counterparts), each of which shall
constitute an original but all of which when taken together shall constitute a
single contract, and shall become effective as provided in Section 8.04.
Delivery of an executed signature page to this Agreement by facsimile
transmission shall be as effective as delivery of a manually signed counterpart
of this Agreement.

      SECTION 8.12. Headings. Article and Section headings used herein are for
the convenience of reference only, are not part of this Agreement and are not to
affect the construction of, or to be taken into consideration in interpreting,
this Agreement.

      SECTION 8.13. Jurisdiction; Consent to Service of Process. (a) The Grantor
hereby irrevocably and unconditionally submits, for itself and its property, to
the nonexclusive jurisdiction of any New York State court or Federal court of
the United States of America sitting in New York City, and any appellate court
from any thereof, in any action or proceeding arising out of or relating to this
Agreement or the other Security Documents, or for recognition or enforcement of
any judgment, and each of the parties hereto hereby irrevocably and
unconditionally agrees that all claims in respect of any such action or
proceeding may be heard and determined in such New York State or, to the extent
permitted by law, in such Federal court. Each of the parties hereto agrees that
a final judgment in any such action or proceeding shall be conclusive and may be
enforced in other jurisdictions by suit on the judgment or in any other manner
provided by law. Nothing in this Agreement shall affect any right that the
Collateral Agent, the Trustee or any Holder may otherwise have to bring any
action or proceeding relating to this Agreement or the other Security Documents
against the Grantor or its properties in the courts of any jurisdiction.

      (b) The Grantor hereby irrevocably and unconditionally waives, to the
fullest extent it may legally and effectively do so, any objection which it may
now or hereafter have to the laying of venue of any suit, action or proceeding
arising out of or relating to this Agreement or the other Security Documents in
any New York State or Federal court. Each of the parties hereto hereby
irrevocably waives, to the fullest extent permitted by law, the defense of an
inconvenient forum to the maintenance of such action or proceeding in any such
court.
<PAGE>
                                                                              13


      (c) Each party to this Agreement irrevocably consents to service of
process by registered mail, postage prepaid. Nothing in this Agreement will
affect the right of any party to this Agreement to serve process in any other
manner permitted by law.

      SECTION 8.14. Termination or Release. (a) Except as provided in Section
8.06, this Agreement and the Security Interest shall terminate when all the
Obligations have been indefeasibly paid in full and the Grantor and the
Guarantor have no further obligations to the Holders.

      (b) In connection with any termination pursuant to paragraph (a) above,
upon the request of the Grantor accompanied by an Officers' Certificate and
Opinion of Counsel stating that all conditions precedent to the termination of
the Lien in the Collateral pursuant to this Agreement and the Indenture have
been satisfied, the Collateral Agent shall execute and deliver to the Grantor,
at the Grantor's expense, all Uniform Commercial Code termination statements and
similar documents which the Grantor shall reasonably request to evidence such
termination. Any execution and delivery of termination statements or documents
pursuant to this Section 8.14 shall be without recourse to or warranty by the
Collateral Agent.

      IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement
as of the day and year first above written.


                           WINSTAR EQUIPMENT CORP., as
                             Grantor,

                             by_______________________________
                               Name:
                               Title:


                           UNITED STATES TRUST COMPANY OF
                             NEW YORK, as Collateral Agent,

                             by_______________________________
                               Name:
                               Title:
<PAGE>

                                                                  Annex 1 to the
                                                              Security Agreement

                                  [Form of]

                             STATUS CERTIFICATE

      Reference is made to the Indenture dated as of March 1, 1997 (as amended,
supplemented or otherwise modified from time to time, the "Indenture"), among
WINSTAR EQUIPMENT CORP., a Delaware corporation ("WinStar Equipment"), WINSTAR
COMMUNICATIONS, INC., a Delaware corporation (the "Guarantor"), UNITED STATES
TRUST COMPANY OF NEW YORK, as trustee (the "Trustee"), and to the Security
Agreement dated March 1, 1997 (as amended, supplemented or otherwise modified
from time to time, the "Security Agreement"), among Winstar Equipment, as
grantor (the "Grantor"), and the Trustee as collateral agent (the "Collateral
Agent"). Capitalized terms used herein and not defined herein shall have the
meanings assigned to such terms in the Indenture.

      Under the Security Agreement, WinStar Equipment is the Grantor of security
interests in the Collateral as defined therein. In order to facilitate the
perfection of such security interests, the Collateral Agent has requested that
WinStar Equipment provide the information specified in this certificate for the
Grantor.

      The undersigned, executive officers of the Grantor, hereby certify to the
Collateral Agent and each other Secured Party as follows:

      1. Names. (a) The exact corporate name of the Grantor, as such name
appears in its certificate of incorporation, is as follows:

      (b) Set forth below is each other corporate name the Grantor has had in
the past five years, together with the date of the relevant change:

      (c) Except as set forth in Schedule 1 hereto, the Grantor has not changed
its identity or corporate structure in any way within the past five years.
Changes in identity or corporate structure would include mergers, consolidations
and acquisitions, as well as any change in the form, nature or jurisdiction of
corporate organization. If any such change has occurred, include in Schedule 1
the information required by Sections 1 and 2 of this certificate as to each
acquiree or constituent party to a merger or consolidation.

      (d) The following is a list of all other names (including trade names or
similar appellations) used by the Grantor or any of its divisions or other
business units in connection with the conduct of its business or the ownership
of its properties at any time during the past five years:

      (e) Set forth below is the Federal Taxpayer Identification Number of the
Grantor: 13-3932469

      2. Current Locations. (a) The chief executive office of the Grantor is
located at the address set forth on Schedule 2(a) hereto.

      (b) Set forth on Schedule 2(b) hereto are all locations where the Grantor
maintains (or intends to maintain) Collateral having an Acquired Cost of at
least $25,000 in such location.

      (c) Set forth on Schedule 2(c) hereto are all the places where the Grantor
maintains an office or other facility not identified in paragraph (a) or (b)
above.
<PAGE>

                                                                               2


      3. Unusual Transactions. All Designated Equipment has been purchased by
the Grantor in the ordinary course of its business.

      4. UCC Filings. Duly signed financing statements on Form UCC-1 in
substantially the form of Schedule 4 hereto have been prepared for filing with
the Secretary of State or other appropriate office of all 50 states of the
United States.

      5. Schedule of Filings. Attached hereto as Schedule 5 is a schedule
setting forth, with respect to the filings described in Section 4 above, each
filing and the filing office in which such filing is to be made.

      6. Filing Fees. All filing fees and taxes payable in connection with the
filings described in Section 4 above have been paid.

      IN WITNESS WHEREOF, the undersigned has duly executed this certificate on
this day of March, 1997.

                           WINSTAR EQUIPMENT CORP.,

                             by_______________________________
                               Name:
                               Title:


                             by_______________________________
                               Name:
                               Title:
<PAGE>

                                                                  SCHEDULE 1

                                     CHANGES
<PAGE>

                                                               SCHEDULE 2(a)

                             CHIEF EXECUTIVE OFFICE

230 Park Avenue
Suite 3126
New York, NY 10169
<PAGE>

                                                               SCHEDULE 2(b)

                           LOCATIONS OF COLLATERAL

99 Summer St., 11th Floor       (Suffolk County)
Boston, MA 02110

600 West Broadway              (San Diego County)
3rd Floor
San Diego, CA 92101

7799 Leesburg Pike, Ste. 401-S  (Fairfax County)
Falls Church, VA 22043

700 South Flower St.          (Los Angeles County)
Los Angeles, CA 90017

101 N. Wacker Drive               (Cook County)
Chicago, IL 60606

Oklahoma City Works             (Oklahoma County)
7725 West Reno
Oklahoma City, OK 73126
<PAGE>

                                                               SCHEDULE 2(c)

                          OFFICES AND OTHER FACILITIES

None.
<PAGE>

                                                                  SCHEDULE 4

                                   FORM UCC-1

See attached.
<PAGE>

                                                                  SCHEDULE 5

                                  UCC-1 FILINGS

See attached.
<PAGE>

            UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE COMPANY
(AS DEFINED BELOW) OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

            UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES
IN DEFINITIVE REGISTERED FORM, THIS CERTIFICATE MAY NOT BE TRANSFERRED EXCEPT AS
A WHOLE BY DTC TO A NOMINEE OF DTC OR BY A NOMINEE OF DTC TO DTC OR ANOTHER
NOMINEE OF DTC OR BY DTC OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A
NOMINEE OF SUCH SUCCESSOR DEPOSITARY.

            THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A
TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF
1933 (THE "SECURITIES ACT"), AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR
OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE
EXEMPTION THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE
SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF
SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

            THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY
THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED
ONLY (i) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A "QUALIFIED
INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (ii) IN AN OFFSHORE
TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (iii) PURSUANT
TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144
THEREUNDER (IF AVAILABLE), (iv) TO THE ISSUER, OR (v) PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH OF CASES (i) THROUGH
(v) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED
STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO,
NOTIFY ANY PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS
REFERRED TO IN (A) ABOVE.
<PAGE>

                                    EA-2


                            WINSTAR EQUIPMENT CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

                                                               CUSIP 975516 AA 3
No. QIB-01                                                          $200,000,000

            WINSTAR EQUIPMENT CORP., a Delaware corporation (the "Company",
which term includes any successor under the Indenture hereinafter referred to),
for value received, promises to pay to CEDE & CO., or its registered assigns,
the principal sum of TWO HUNDRED MILLION DOLLARS ($200,000,000) on March 15,
2004.

            Interest Payment Dates: March 15 and September 15, commencing
September 15, 1997.

            Regular Record Dates: March 1 and September 1.

            Reference is hereby made to the further provisions of this Note set
forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.
<PAGE>

                                    EA-3


      IN WITNESS WHEREOF, the Company has caused this Note to be signed manually
or by facsimile by its duly authorized officer.

                             WINSTAR EQUIPMENT CORP.


                             By:________________________________________________
                                Name:
                                Title:

               (Form of Trustee's Certificate of Authentication)

This is one of the 12 1/2% Guaranteed Senior Secured Notes Due 2004 described in
the within-mentioned Indenture.


Date: March 18, 1997         UNITED STATES TRUST COMPANY OF NEW YORK, as Trustee


                             By:________________________________________________
                                Authorized Signatory
<PAGE>

                                    EA-4


                            WINSTAR EQUIPMENT CORP.

                 12 1/2% Guaranteed Senior Secured Note Due 2004

1. Principal and Interest.

            The Company will pay the principal of this Note on March 15, 2004.

            The Company promises to pay interest on the principal amount of this
Note on each Interest Payment Date, as set forth below, at the rate per annum
shown above.

            Interest will be payable semiannually (to the holders of record of
the Notes at the close of business on the March 1 and September 1 immediately
preceding the relevant Interest Payment Date) on each Interest Payment Date,
commencing September 15, 1997.

            Interest on the Notes will accrue from the most recent Interest
Payment Date; provided, however, that, if there is no existing default in the
payment of interest and this Note is authenticated between a Regular Record Date
referred to on the face hereof and the next succeeding Interest Payment Date,
interest shall accrue from such Interest Payment Date. Interest will be computed
on the basis of a 360-day year of twelve 30-day months. Notwithstanding the
above, (i) if a Registration Default (as defined in the Registration Rights
Agreement) occurs, additional interest will accrue on this Note at a rate of
0.50% per annum from and including the date on which any such Registration
Default shall occur to but excluding the earlier of (x) the date on which all
Registration Defaults have been cured and (y) the date on which all Notes become
freely transferable by Holders other than Affiliates of the Company without
further registration under the Securities Act.

            The Company shall pay interest on overdue principal and premium, if
any, and (to the extent lawful) interest on overdue installments of interest.

2.  Method of Payment.

      The Company will pay principal as provided above and interest (except
defaulted interest) on the principal amount of the Notes as provided above on
each March 15 and September 15 to the persons who are Holders (as reflected in
the Security Register at the close of business on the March 1 and September 1
immediately preceding the relevant Interest Payment Date), in each case, even if
the Note is cancelled on registration of transfer or registration of exchange
after such record date; provided, however, that, with respect to the payment of
principal, the Company will not make payment to the Holder unless this Note is
surrendered to a Paying Agent.

      The Company will pay principal and interest in money of the United States
that at the time of payment is legal tender for payment of public and private
debts. Payments in respect of the Notes represented by a 
<PAGE>
                                      EA-5


global Note (including principal, premium and interest) will be made by wire
transfer of immediately available funds to the accounts specified by The
Depository Trust Company. The Company will make all payments in respect of a
certificated Note (including principal, premium and interest) by mailing a check
to the registered address of each Holder thereof; provided, however, that
payments on a certificated Note will be made by wire transfer to a U.S. dollar
account maintained by the payee with a bank in the United States if such Holder
elects payment by wire transfer by giving written notice to the Trustee or the
Paying Agent to such effect designating such account no later than 30 days
immediately preceding the relevant due date for payment (or such other date as
the trustee may accept in its discretion).

3. Paying Agent and Registrar.

            Initially, United States Trust Company of New York (the "Trustee")
will act as authenticating agent, Paying Agent and Registrar. The Company may
change any authenticating agent, Paying Agent or Registrar without notice. The
Company, any Subsidiary or any Affiliate of any of them may act as Paying Agent,
Registrar or co-Registrar.

4. Indenture.

            The Company issued the Notes under an Indenture dated as of March
1,1997 (the "Indenture"), among the Company, WinStar Communications, Inc., as
guarantor (the "Guarantor") and the Trustee. Capitalized terms herein are used
as defined in the Indenture unless otherwise indicated. The terms of the Notes
include those stated in the Indenture and those made part of the Indenture by
reference to the Trust Indenture Act. The Notes are subject to all such terms,
and Holders are referred to the Indenture and the Trust Indenture Act for a
statement of all such terms. To the extent permitted by applicable law, in the
event of any inconsistency between the terms of this Note and the terms of the
Indenture, the terms of the Indenture shall control.

            The Notes are secured senior indebtedness of the Company. The
Indenture limits the original aggregate principal amount of the Notes to
$200,000,000 (subject to Section 2.07 of the Indenture).

5. Optional Redemption.

            The Notes will not be redeemable prior to March 15, 2002.
Thereafter, the Notes will be redeemable, at the Company's option, in whole at
any time or in part from time to time on or after March 15, 2002 and prior to
maturity, upon not less than 30 nor more than 60 days' prior notice mailed by
first-class mail to each Holders' last address as it appears in the Security
Register, at the following Redemption Prices (expressed as a percentage of the
principal amount of the Notes, plus accrued and unpaid interest, if any, on such
amount to the Redemption Date (subject to the right of Holders of record on the
relevant Regular Record Date that is on or prior to the Redemption Date to
receive interest due on the relevant Interest Payment Date if redeemed during
the 12-month period commencing on March 15 of the years set forth below:
<PAGE>
                                      EA-6


                  Year                       Redemption Price
                  ----                       ----------------
                  2002                         106.250%
                  2003 and thereafter          103.125%

6. Mandatory Redemption.

            In the event that by March 18, 1999, the Company shall not have
applied at least $200.0 million to fund the Acquisition Costs of Designated
Equipment pursuant to the Indenture ($200.0 million less the amount so applied
being herein called the "Unused Equipment Amount"), the Company shall redeem
Notes in an aggregate principal amount equal to the Unused Equipment Amount at a
redemption price of 112.5% of such principal amount, plus accrued and unpaid
interest thereon to the Redemption Date (subject to the right of Holders of
record on the relevant Regular Record Date that is on or prior to the Redemption
Date to receive interest due on the relevant Interest Payment Date). The
mandatory redemption shall occur no later than April 2, 1999.

            Selection of the Notes for mandatory redemption will be made on a
pro rata basis; provided, however, that no Note of $1,000 in principal amount or
less shall be redeemed in part. If any Notes are to be redeemed in part only, a
new Note in principal amount equal to the unredeemed portion thereof will be
issued in the name of the Holder thereof upon cancellation of the original Note.

7. Notice of Redemption.

            Notice of any optional redemption will be mailed by the Company at
least 30 days but not more than 60 days before a Redemption Date, and notice of
a mandatory redemption will be mailed by the Company at least 10 Business Days
but not more than 15 Business Days before a Redemption Date, in each case, to
each Holder of Notes to be redeemed at his last address as it appears in the
Security Register. Notes in original denominations larger than $1,000 may be
redeemed in part; provided, however, that Notes will only be issued in
denominations of $1,000 principal amount or integral multiples thereof. On and
after the Redemption Date, interest ceases to accrue on Notes (or portions of
Notes) called for redemption, unless the Company defaults in the payment of the
Redemption Price.

8. Repurchase upon Change in Control.

      Upon the occurrence of a Change of Control, each Holder shall have the
right to require the repurchase of its Notes by the Company in cash pursuant to
the offer described in the Indenture at a purchase price equal to 101% of the
principal amount of such Notes on such date of purchase, plus accrued and unpaid
interest,if any, on such amount to the date of purchase (the "Change of Control
Payment").

      A notice of such Change of Control will be mailed within 30 days after any
Change of Control occurs to each Holder at his last address as it appears in the
Security Register. Notes in original denominations larger than $1,000 may be
sold to the Company in part; provided, however, that Notes will only be issued
in 
<PAGE>
                                      EA-7


denominations of $1,000 principal amount at maturity or integral multiples
thereof. On and after the Change of Control Payment Date, interest ceases to
accrue on Notes or portions of Notes surrendered for purchase by the Company,
unless the Company defaults in the payment of the Change of Control Payment.

9. Guarantee.

      The Notes are guaranteed on a senior unsubordinated basis by the Guarantor
to the extent provided in the Indenture.

10. Collateral and Security Documents.

      To secure the due and punctual payment of the principal of, premium if
any, and interest on the Notes and all other amounts payable by the Company
under the Indenture and the Notes when and as the same shall be due and payable,
whether at maturity, by acceleration or otherwise, the Grantor has granted
security interests in the Collateral to the Collateral Agent for the benefit of
the Holders of Notes pursuant to the Security Documents.

11. Denominations; Transfer; Exchange.

            The Notes are in registered form without coupons in denominations of
$1,000 of principal amount and integral multiples thereof. A Holder may register
the transfer or exchange of Notes in accordance with the Indenture. The
Registrar may require a Holder, among other things, to furnish appropriate
endorsements and transfer documents and to pay any taxes and fees required by
law or permitted by the Indenture. The Registrar need not register the transfer
or exchange of any Notes selected for redemption. Also, it need not register the
transfer or exchange of any Notes for a period of 15 days before a selection of
Notes to be redeemed is made.

12. Persons Deemed Owners.

      A Holder shall be treated as the owner of a Note for all purposes.

13. Unclaimed Money.

      If money for the payment of principal, premium, if any, or interest
remains unclaimed for two years, the Trustee and the Paying Agent will pay the
money back to the Company at its request. After that, Holders entitled to the
money must look to the Company for payment, unless an applicable law designates
another Person, and all liability of the Trustee and such Paying Agent with
respect to such money shall cease.
<PAGE>
                                      EA-8


14. Discharge Prior to Redemption or Maturity.

      Subject to certain conditions, the Company at any time may terminate some
or all of its obligations under the Notes, the Indenture and the Security
Documents, and the Guarantor may terminate its obligations under the Equipment
Note Guarantee, if the Company deposits with the Trustee money or U.S.
Government Obligations for payment of principal and interest on the Notes to
redemption or maturity, as the case may be.

15. Amendment; Supplement; Waiver.

            Subject to certain exceptions, the Indenture or the Notes may be
amended or supplemented with the consent of the Holders of at least a majority
in principal amount of the Notes then outstanding, and any existing default or
compliance with any provision may be waived with the consent of the Holders of
at least a majority in principal amount of the Notes then outstanding. Without
notice to or the consent of any Holder, the parties thereto may amend or
supplement the Indenture or the Notes to, among other things, cure any
ambiguity, defect or inconsistency and make any change that, in the opinion of
the Board of Directors of the Company, does not materially and adversely affect
the rights of any Holder.

16. Restrictive Covenants.

            The Indenture imposes certain limitations on the ability of the
Guarantor and its Restricted Subsidiaries, among other things, to incur
additional indebtedness; create liens; engage in sale-leaseback transactions;
pay dividends or make distributions in respect of their capital stock; make
investments or make certain other restricted payments; sell assets; issue or
sell stock of Restricted Subsidiaries; enter into transactions with stockholders
or affiliates; or, with respect to the Company, to incur any indebtedness other
than the Notes; engage in any other business activities; apply the gross
proceeds from the sale of the Notes to uses other than the acquisition of
Designated Equipment; fail to take action to vest a security interest in the
Designated Equipment in the Trustee; fail to file proper UCC-1s and UCC-3s;
consolidate, merge or sell all or substantially all of its assets. Within 90
days after the end of the last fiscal quarter of each year, the Company must
report to the Trustee on compliance with such limitations.

17. Successor Persons.

            Generally, when a successor person or other entity assumes all the
obligations of its predecessor under the Notes and the Indenture, the
predecessor person will be released from those obligations.

18. Defaults and Remedies.

            The following events constitute "Events of Default" under the
Indenture: (a) default in the payment of principal of (or premium, if any, on)
any Note when the same becomes due and payable, upon acceleration, redemption or
otherwise; (b) default in the payment of interest on any Note when the same
becomes due and payable, and such default continues for a period of 30 days; (c)
the Company or WCI defaults 
<PAGE>
                                      EA-9


in the performance of or breaches any other covenant or agreement of the Company
or WCI in the Indenture or under the Notes or the Security Documents and such
default or breach continues for a period of 30 consecutive days after written
notice by the Trustee or the Holders of 25% or more in aggregate principal
amount of the Notes; (d) there occurs with respect to any issue or issues of
Indebtedness of WCI or any Significant Subsidiary having an outstanding
principal amount of $25,000,000 or more in the aggregate for all such issues of
all such Persons, whether such Indebtedness now exists or shall hereafter be
created, (i) an event of default that has caused the holder thereof to declare
such Indebtedness to be due and payable prior to its Stated Maturity and such
Indebtedness has not been discharged in full or such acceleration has not been
rescinded or annulled within 30 days of such acceleration and/or (ii) the
failure to make a principal payment at the final (but not any interim) fixed
maturity and such defaulted payment shall not have been made, waived or extended
within 30 days of such payment default; (e) any final judgment or order (not
covered by insurance) for the payment of money in excess of $25,000,000 in the
aggregate for all such final judgments or orders against all such Persons
(treating any deductibles, self-insurance or retention as not so covered) shall
be rendered against WCI or any Significant Subsidiary and shall not be paid or
discharged, and there shall be any period of 60 consecutive days following entry
of the final judgment or order that causes the aggregate amount for all such
final judgments or orders outstanding and not paid or discharged against all
such Persons to exceed $25,000,000 during which a stay of enforcement of such
final judgment or order, by reason of a pending appeal or otherwise, shall not
be in effect; (f) a court having jurisdiction in the premises enters a decree or
order for (i) relief in respect of WCI or any Significant Subsidiary in an
involuntary case under any applicable bankruptcy, insolvency or other similar
law now or hereafter in effect, (ii) appointment of a receiver, liquidator,
assignee, custodian, trustee, sequestrator or similar official of WCI or any
Significant Subsidiary or for all or substantially all of the property and
assets of WCI or any Significant Subsidiary or (iii) the winding up or
liquidation of the affairs of WCI or any Significant Subsidiary and, in each
case, such decree or order shall remain unstayed and in effect for a period of
60 consecutive days; (g) WCI or any Significant Subsidiary (i) commences a
voluntary case under any applicable bankruptcy, insolvency or other similar law
now or hereafter in effect, or consents to the entry of an order for relief in
an involuntary case under any such law, (i) consents to the appointment of or
taking possession by a receiver, liquidator, assignee, custodian, trustee,
sequestrator or similar official of WCI or any Significant Subsidiary or for all
or substantially all of the property and assets of WCI or any Significant
Subsidiary or (iii) effects any general assignment for the benefit of creditors;
(h) any of the provisions of the Indenture relating to the Security Documents or
the Security Documents shall cease to be in full force and effect or shall cease
to give the secured parties the Liens, rights, power and privileges purported to
be created thereby; or (i) the Equipment Note Guarantee shall cease to be in
full force and effect (other than in accordance with its terms) or the Guarantor
shall deny or disaffirm its obligations under the Equipment Note Guarantee.

      If an Event of Default (other than an Event of Default specified in clause
(f) or (g) above that occurs with respect to the Company or WCI) occurs and is
continuing under the Indenture, the Trustee or the Holders of at least 25% in
aggregate principal amount of the Notes, then outstanding, by written notice to
the Company (and to the Trustee if such notice is given by the Holders), may,
and the Trustee at the request of such Holders shall, declare the principal of,
premium, if any, and accrued interest, if any, on the Notes to be immediately
due and payable. If a bankruptcy or insolvency default with respect to the
Company or any Restricted 
<PAGE>
                                     EA-10


Subsidiary occurs and is continuing, the principal amount of the Notes
automatically becomes due and payable. Holders may not enforce the Indenture or
the Notes except as provided in the Indenture. The Trustee may require indemnity
satisfactory to it before it enforces the Indenture or the Notes. Subject to
certain limitations, Holders of at least a majority in principal amount of the
Notes then outstanding may direct the Trustee in its exercise of any trust or
power.

19. Trustee Dealings with Company.

            The Trustee under the Indenture, in its individual or any other
capacity, may make loans to, accept deposits from and perform services for the
Company or its Affiliates and may otherwise deal with the Company or its
Affiliates as if it were not the Trustee.

20. No Recourse Against Others.

            No incorporator, stockholder, officer, director, employee or
controlling person as such, of the Company or of any successor Person thereof in
such capacity, shall have any liability for any obligations of the Company under
the Notes or the Indenture or for any claim based on, in respect of or by reason
of, such obligations or their creation provided, however, that the foregoing
shall not affect the Guarantor's obligations with respect to the Equipment Note
Guarantee. Each Holder by accepting a Note waives and releases all such
liability. Such waiver and release are part of the consideration for the
issuance of the Notes.

21. Authentication.

            This Note shall not be valid until the Trustee or authenticating
agent signs the certificate of authentication on the other side of this Note.

22. Holders' Compliance with Registration Rights Agreement.

            Each Holder of a Note, by acceptance hereof, acknowledges and agrees
to the provisions of the Registration Rights Agreement, including, without
limitation, the obligations of the Holders with respect to a registration and
the indemnification of the Company to the extent provided therein.

23. Abbreviations.

      Customary abbreviations may be used in the name of a Holder or an
assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the
entireties), JT TEN (= joint tenants with right of survivorship and not as
tenants in common), CUST (= Custodian) and U/G/M/A (= Uniform Gifts to Minors
Act).

24. Governing Law.
<PAGE>
                                     EA-11


      The Indenture and the Notes shall be governed by the State of New York,
excluding (to the extent permissible by law) any rule of law that would cause
the application of the laws of any jurisdiction other than the State of New
York.

      The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture. Requests may be made to WinStar Equipment Corp.,
230 Park Avenue, Suite 3126, New York, NY 10169, Attention: General Counsel.
<PAGE>
                                     EA-12


                                ASSIGNMENT FORM

I or we assign and transfer this Note to:


Please insert social security or other identifying number of assignee
________________________________________________________________________________
________________________________________________________________________________

Print or type name, address and zip code of assignee and irrevocably appoint
_____________, as agent, to transfer this Note on the books of the Company.

The agent may substitute another to act for him.

Dated ___________   Signed ________________

________________________________________________________________________________
(Sign exactly as name appears on the other side of this Note)

Signature Guarantee __________________________ (1)

In connection with any transfer of any of the Securities evidenced by this
certificate occurring prior to the expiration of the period referred to in Rule
144(k) under the Securities Act after the later of the date of original issuance
of such Securities and the last date, if any, on which such Securities were
owned by the Company or 

- ----------

(1) The Holder's signature must be guaranteed by a member firm of a registered
national securities exchange or of the National Association of Securities
Dealers, Inc., a commercial bank or trust company having an office or
correspondent in the United States or an "eligible guarantor institution" as
defined by Rule 17Ad-15 under the Exchange Act.
<PAGE>
                                     EA-13


any Affiliate of the Company, the undersigned confirms that such Securities are
being transferred in accordance with its terms:

CHECK ONE BOX BELOW

      (1)   |_|   to the Company; or

      (2)   |_|   pursuant to an effective registration statement under the
                  Securities Act of 1933; or

      (3)   |_|   inside the United States to a "qualified institutional buyer"
                  (as defined in Rule 144A under the Securities Act of 1933)
                  that purchases for its own account or for the account of a
                  qualified institutional buyer to whom notice is given that
                  such transfer is being made in reliance on Rule 144A, in each
                  case pursuant to and in compliance with Rule 144A under the
                  Securities Act of 1933; or

      (4)   |_|   outside the United States in an offshore transaction within
                  the meaning of Regulation S under the Securities Act in
                  compliance with Rule 904 under the Securities Act of 1933; or

      (5)   |_|   pursuant to another available exemption from registration
                  provided by Rule 144 under the Securities Act of 1933.

      Unless one of the boxes is checked, the Trustee will refuse to register
      any of the Securities evidenced by this certificate in the name of any
      person other than the registered holder thereof; provided, however, that
      if box (4) or (5) is checked, the Trustee may require, prior to
      registering any such transfer of the Securities, such legal opinions,
      certifications and other information as the Company has reasonably
      requested to confirm that such transfer is being made pursuant to an
<PAGE>
                                     EA-14


      exemption from, or in a transaction not subject to, the registration
      requirements of the Securities Act of 1933, such as the exemption provided
      by Rule 144 under such Act.


                                    ______________________________
                                              Signature

Signature Guarantee:

____________________________        ___________________________
Signature must be guaranteed        Signature

_______________________________________________________________

          TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED.

            The undersigned represents and warrants that it is purchasing this
Security for its own account or an account with respect to which it exercises
sole investment discretion and that it and any such account is a "qualified
institutional buyer" within the meaning of Rule 144A under the Securities Act of
1933, and is aware that the sale to it is being made in reliance on Rule 144A
and acknowledges that it has received such information regarding the Company as
the undersigned has requested pursuant to Rule 144A or has determined not to
request such information and that it is aware that the transferor is relying
upon the undersigned's foregoing representations in order to claim the exemption
from registration provided by Rule 144A.

Dated: ________________       ______________________________
                              NOTICE: To be executed by
                              an executive officer
<PAGE>
                                     EA-15


          SCHEDULE OF INCREASES OR DECREASES IN GLOBAL SECURITY

            The following increases or decreases in this Global Security have
been made:

<TABLE>
<CAPTION>
Date of        Amount of decrease in        Amount of increase in        Principal amount of this      Signature of authorized
Exchange     Principal Amount of this     Principal Amount of this      Global Security following       officer of Trustee or
                 Global Security              Global Security           such decrease or increase)      Securities Custodian
<S>          <C>                          <C>                           <C>                           <C>    

</TABLE>
<PAGE>
                                     EA-16


                      OPTION OF HOLDER TO ELECT PURCHASE

            If you wish to have this Note purchased by the Company pursuant to
Section 4.11 or Section 4.12 of the Indenture, check the Box: |_|

            If you wish to have a portion of this Note purchased by the Company
pursuant to Section 4.11 or Section 4.12 of the Indenture, state the amount (in
principal amount): $________________

Date:_______________________________

Your Signature:_________________________________________________________________
              (Sign exactly as your name appears on the other side of this Note)

Signature Guarantee:______________________________(2)

- ----------
(2) The Holder's signature must be guaranteed by a member firm of a registered
national securities exchange or of the National Association of Securities
Dealers, Inc., a commercial bank or trust company having an office or
correspondent in the United States or an "eligible guarantor institution" as
defined by Rule 17Ad-15 under the Exchange Act.
<PAGE>



                    WINSTAR COMPLETES $300 MILLION FINANCING
                  AND OBTAINS $150 MILLION FACILITY COMMITMENT

                     WinStar's Plan Funded to the Year 2000


     NEW YORK - MARCH 18, 1997,  WINSTAR  COMMUNICATIONS,  INC.  (NASDAQ - WCII)
today announced that it has raised $300 million in a 144A institutional  private
placement,  and also obtained a $150 million facility commitment in 1999 for its
capital  needs  beyond  the  next  24  to  30  months  from  affiliates  of  its
underwriters,  Credit Suisse First Boston and BT  Securities,  a unit of Bankers
Trust.  There was no equity  associated  with the  offering or the $150  million
facility.  The  proceeds of the  offering and the  facility,  combined  with the
company's  recent  placement of $100  million in  convertible  preferred  stock,
brings WinStar's cash position to approximately $450 million and its total funds
potentially available to $600 million.

     WinStar expects to spend up to $500 million on capital  expenditures during
the next three years as it continues to roll out its competitive  local exchange
carrier  (CLEC)  business.  The company has opened sales offices in 12 cities so
far and is currently  installing  Lucent 5ESS switches in Chicago,  Los Angeles,
Boston, and San Diego. The four new switches will go into operation this spring,
when the company will also cover Newark,  New Jersey with switched services from
its New York switch,  which went into operation last fall. By year end,  WinStar
plans to cover  approximately 16 major markets with switched services.  Over the
next three years, the company plans to provide  switched  services in all thirty
major markets in which it owns four or more 100 MHz channels of 38 GHz spectrum.

     WinStar sold the  following  notes,  neither of which is  convertible  into
equity of the company:

o    $100  million of Senior  Notes of the company due 2005,  ranking pari passu
     with the company's  existing senior discount notes, and bearing interest at
     14.5%.

o    $200 million of Guaranteed  Senior  Secured Notes due 2004 of the company's
     subsidiary, WinStar Equipment Corp., bearing interest at 12.5%

     Interest  on  the   company's   Senior   Notes  will  accrue  and  compound
semi-annually, but will not be payable in cash until April 2001. Interest on the
Guaranteed  Senior  Secured  Notes of WinStar  Equipment  Corp.  will be payable
semi-annually  commencing  September 1, 1997. The  Guaranteed  Secured Notes are
unconditionally  guaranteed  by  the  company.  The  notes  are  expected  to be
registered under the The Securities Act of 1933 within six months.

     "We are delighted that Credit Suisse First Boston and BT Securities devised
an innovative approach to financing our company during a difficult bond market,"
commented William J. Rouhana, Jr., Chairman and Chief Executive Officer, WinStar
Communications.   "The   structure  of  this   transaction   saves  our  company
considerable  interest  expense  and  provides us with the comfort of a financed
business plan, so that we can focus on execution. We are especially pleased that
we were able to raise this capital without diluting our shareholders."



<PAGE>


     WinStar  Communications,  Inc. is a national local  communications  company
serving business  customers,  long distance  carriers,  fiber-based  competitive
access providers,  mobile communications  companies,  local telephone companies,
and other  customers  with broadband  local  communications  needs.  The company
provides  its  Wireless  Fiber(TM)  services  using its  licenses  in the 38 GHz
spectrum.  The company  also  provides  long  distance  and various  information
services and entertainment content.

     Except  for  any  historical  information  contained  herein,  the  matters
discussed in this press release contain forward-looking  statements that involve
risks and  uncertainties  which are  described  in the  company's  SEC  reports,
including  the 10-KSB for the period  ended  December 31, 1995 and the 10-Qs for
the periods ended March 31, June 30, and September 30, 1996.

     Wireless Fiber is a service mark of WinStar Communications, Inc.


<PAGE>




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