WINSTAR COMMUNICATIONS INC
8-K, 1998-07-23
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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)  July 10, 1998


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



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



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



Registrant's telephone number, including area code:(212) 584-4000



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


                                Page 1 of 3 Pages



                                                   


<PAGE>



Item 5.           Other Events.

                  On July 10, 1998, WinStar  Communications,  Inc.  (Registrant)
entered into an Agreement to Purchase LMDS License with CellularVision USA, Inc.
("CVUSA")  and  CellularVision  of New York,  L.P.  ("CVNY")  pursuant  to which
Registrant  has agreed to  purchase  from CVNY a license  granted by the Federal
Communications  Commission  ("FCC") for 850 MHz of  bandwidth  in New York City.
This  bandwidth  will be  disaggregated  from CVNY's  license and combined  with
Registrant's  existing 38 GHz licenses to establish a total spectrum position of
1.750 MHz in New York City.  Registrant  will pay $32.5  million in cash for the
license.  The transaction is subject to the receipt of consent of the FCC to the
transfer of the license,  compliance with  provisions of the Hart-Scott-  Rodino
Antitrust  Improvements  Act of 1976,  approval of the stockholders of CVUSA and
other conditions usual to transactions of such nature.

                  Registrant  also has agreed to lend CVNY $3.5  million  (which
was advanced on July 17, 1998) and an additional $2.0 million upon completion of
necessary  filings  with  the  FCC and  the  granting  of  approval  by  CVUSA's
stockholders.  Registrant  may lend  CVNY up to an  additional  $7.0 in  certain
circumstances.  Payment  of the  loans to CVNY is  guaranteed  by  CVUSA  and is
secured  by  pledges  of all of the  assets  of both  CVUSA  and CVNY as well as
pledges  of the  stock of the  general  partner  of CVNY and all of the  limited
partnership interests of CVNY.


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

         (a)      Financial Statements.

                           Not applicable.

         (b)      Pro Forma Financial Information.

                           Not applicable.

         (c)      Exhibits.

                  1.  Agreement to Purchase  LMDS License dated July 10, 1998 by
and between Registrant, CVUSA and CVNY.

                  2. Loan  Agreement  dated July 10, 1998 among CVNY,  CVUSA and
Registrant.

                  3. Security  Agreement  dated July 10, 1998 by and among CVNY,
CVUSA and Registrant.

                  4. Press Release of Registrant issued July 13, 1998.





                                        2


<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: July 23, 1998                            WINSTAR COMMUNICATIONS, INC.
                                                ----------------------------
                                                (Registrant)


                                                  /s/ Frederic E. Rubin
                                                 ------------------------------
                                                  Frederic E. Rubin
                                                  Vice President and Treasurer




                                        3



                                                                EXECUTION COPY

                       AGREEMENT TO PURCHASE LMDS LICENSE



     AGREEMENT  TO  PURCHASE  LMDS  LICENSE,  dated  as of July 10,  1998  (this
"Agreement") by and between WinStar Communications, Inc., a Delaware corporation
the "Purchaser"), CellularVision USA, Inc., a Delaware corporation ("CVUSA") and
CellularVision of New York, L.P., a Delaware limited partnership ("Seller"),

     WHEREAS,  Seller holds the LMDS A Block  License (the  "License")  from the
Federal  Communications   Commission  (the  "FCC")  for  the  New  York  Primary
Metropolitan  Statistical Area (i.e.,  the five boroughs  comprising the City of
New York, and the contiguous  New York State counties of  Westchester,  Rockland
and  Putnam),  free and  clear of all  liens,  claims,  rights of usage by third
parties and other encumbrances (collectively, "Liens"),

     WHEREAS, Seller and CVUSA have retained Wasserstein Perella & Co., Inc.
to advise them on the marketing and sale of the 850 MHz License and  Wasserstein
Perella & Co., Inc. has managed the sale process,  which  included,  among other
things,  contacting  a large number of  potential  purchasers  as well as active
negotiations  with certain  potential  purchasers,  all of which resulted in the
offer of the Purchase  Price and the Loans (as  hereinafter  defined) all on the
terms and  conditions  set forth herein,  which CVUSA deems to be the best offer
currently available for the 850 MHz License;

     WHEREAS,  Seller intends to disaggregate 850 MHz of the spectrum covered by
the License,  comprised of the frequencies  between 27.5 and 28.35 GHz and to be
conveyed to Purchaser pursuant to a license granted by the FCC thereto (the "850
MHz  License") and  Purchaser  wishes to purchase the 850 MHz License,  upon the
terms and  subject to the  conditions  set forth  herein,  free and clear of all
Liens.

     WHEREAS,  holders of not less than 39% of the outstanding  shares of common
stock  of  CVUSA  wish  to  irrevocably   consent  to  this  Agreement  and  the
transactions contemplated hereby;

     NOW, THEREFORE, in consideration of the premises, and the mutual conditions
and obligations set forth herein, the parties hereto hereby agree as follows:


<PAGE>

     1. Purchase  Price;  Loan.  (a) The purchase  price for the 850 MHz License
shall be $32,500,000,  of which a portion will be payable by offset of the total
outstanding principal amount and accrued interest on the Loan (as defined below)
and the  remainder  of which  will be payable by wire  transfer  of  immediately
available funds to Seller at the Closing (defined in Section 3).

     (b) As promptly as practicable following the execution and delivery of this
Agreement  by the parties  hereto  (including  the voting  agreement  of certain
holders  owning not less than 39% of the  outstanding  shares of common stock of
CVUSA),  Purchaser  will make an initial loan to Seller (the "Initial  Loan") in
the amount of  $3,500,000,  and,  when  Seller  shall have made the FCC  filings
contemplated  by Section  2(a) and CVUSA  shall have  obtained  the  stockholder
approval  contemplated by Section 13,  Purchaser will make an additional loan in
the amount of  $2,000,000  (such loan,  together  with the Initial  Loan and the
loans that  Purchaser may, in its sole  discretion,  make pursuant to Section 6,
the "Loans") at 7.5% per annum,  with interest and principal  payable in full at
the Closing by way of offset  against the  purchase  price then due, as provided
above, or on such earlier date as this Agreement may be terminated in accordance
with its terms, provided that in the event of such a termination,  such interest
rate  will be 18% per  annum.  The Loans  will be  secured  by a first  priority
perfected  security  interest  on all of the  assets  of  Seller  as to  which a
security interest may be granted,  including,  without limitation,  the proceeds
from such assets as well as from the sale or other transfer of FCC licenses,  it
being  understood  and agreed that (i) a vendor's  security  interest in certain
equipment has been assigned to NewStart Factors,  Inc. and (ii) the FCC licenses
may not be  subject  to  security  interests  as a  matter  of law.  Purchaser's
security  interest  will  extend to  after-acquired  property  and to  proceeds,
provided that Borrower will retain the right to enter into vendor  financing and
equivalent  secured financing  arrangements  with respect to equipment  acquired
after the date hereof.  CVUSA will  guarantee the repayment in full of the Loans
in accordance with its terms, and will secure its guarantee with a pledge of all
of the outstanding  shares of stock of  CellularVision  Capital Corp.,  the sole
general  partner  of  Seller,  and all of the  outstanding  limited  partnership
interests  in  Seller,  all of which are owned by CVUSA.  The  parties  agree to
prepare,  review  and  negotiate  in good  faith  and  execute  as  promptly  as
practicable  (and in any  event  prior to the  funding  of the  Loans)  mutually
acceptable  definitive  documentation  ((the "Loan Documents") in customary form
for  these  financing  transactions,   including,  without  limitation,  a  Loan
Agreement  (including  guaranty  provisions),   a  Note,  a  Security  Agreement
(including  pledge  provisions),  and UCC-1  forms.  To the  extent  there is an
inconsistency  between the Loan Documents and this Agreement with respect to the
Loans and related security arrangements, the Loan Documents shall control.


<PAGE>

     2.  Government  Approvals;  Transition.  (a)  As  promptly  as  practicable
following  the execution  and delivery of this  Agreement,  Seller and Purchaser
will (i) file appropriate applications for the disaggregation of the License and
assignment  of the 850 MHz License to Purchaser and (ii) make such filings under
the  Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976 and the  rules  and
regulations (collectively, the "HSR Act") as may be legally required in order to
consummate the transactions  contemplated herein, with the filing fee related to
any such filing to be shared by Purchaser and CVNY on a 50%/50% basis. Following
the making of such  applications  and  filings,  both  parties  will  diligently
attempt to obtain  successful  results  with  respect  thereto in a manner  that
permits the  consummation  of the  transactions  contemplated  herein as soon as
practicable.

     (b) Prior to the Closing,  and in accordance with all applicable  legal and
regulatory  requirements,  Seller will clear its  operations  from the  spectrum
covered by the 850 MHz  License,  such  transition  to be completed in any event
within 90 days of the date of FCC Approval (as herein defined).

     3.  Closing.  The  closing of the  transactions  contemplated  herein  (the
"Closing")  shall occur on the first business day (the "Closing Date") following
the first date upon which all of the following conditions are satisfied: (i) the
FCC shall have granted its consent to the  assignment  of the 850 MHz License to
Purchaser  and,  unless  waived by  Purchaser,  such consent shall have become a
final,  nonappealable order no longer subject to review or reconsideration ("FCC
Approval"); (ii) CVUSA shall have obtained the approval of its stockholders with
respect  to the  transactions  contemplated  hereby;  and (iii)  any  applicable
waiting  period  under the HSR Act shall have  expired  without  action taken to
prevent  the  consummation  of  the  transactions  contemplated  herein.  At the
closing,  Seller shall assign the 850 MHz License to Purchaser free and clear of
all Liens against payment of the Purchase Price as contemplated by Section 1.

     4.  Representations  and  Warranties.  (a) Each party  (the  "Representer")
hereby  represents  and warrants to the other that (i) the  Representer  has all
requisite  power and authority to execute this  Agreement and the Loan Documents
and perform its  obligations  hereunder and  thereunder,  (ii) all corporate and
partnership action necessary for the authorization, execution and performance by
the  Representer of its  obligations  hereunder and thereunder  have been taken,
except that,  in the case of CVUSA,  stockholder  approval may be required,  and
(iii) subject to obtaining the consent and approvals  referred to in paragraph 3
above,  the execution,  delivery and  performance of this Agreement and the Loan
Documents  does not and will not  require  the  consent  of any other  person or
entity, contravene the certificate of incorporation or by-laws or certificate of
limited partnership or partnership agreement of the Representer or conflict with
or result in a breach  or  violation  by the  Representer  of any law,  court or
administrative order or contract to which the Representer is a party or by which
the Representer is bound.

     (b) Seller and CVUSA hereby  represent  and warrant that Seller is the sole
legal and  beneficial  owner  and  holder of the  License,  has the right  under
applicable  law and FCC  regulations  to effect the  disaggregation  of spectrum
contemplated  hereby and that the License  is, and the 850 MHz License  will be,
held by Seller  free and clear of all Liens.  Without  limiting  the  foregoing,
Seller hereby represents and warrants that no person or entity other than Seller
has or will have the right to use all or any  portion of the  License or the 850
MHz License.  Seller hereby  further  represents  and warrants that (i) it is in
compliance  in all material  respects  with the  Communications  Act of 1934, as
amended,  and the rules,  regulations  and policies of the FCC,  (ii) Seller has
satisfied all build-out,  renewal,  construction  and other material  regulatory
requirements, and (iii) there are no pending complaints,  challenges, petitions,
appeals  or  other  regulatory  encumbrances  pending  or,  to the  best  of the
knowledge of Seller or CVUSA, threatened, against Seller or the License.


<PAGE>

     (c) Each party will use all commercially reasonable efforts to cause all of
its  representations and warranties in this Agreement to remain true and correct
at all times through the Closing Date and to cause all  conditions to Closing to
be satisfied.

     5.  Closing  Conditions.  (a) Each  Party's  obligation  to close  shall be
subject to the following  conditions (i) the other party's  representations  and
warranties  hereunder and under the Loan Documents  shall be true and correct on
and as of the Closing  Date as if made again on that date,  (ii) the other party
shall  have  performed  all  covenants  to have  been  performed  hereunder  and
thereunder  and (iii) the other party shall have  delivered a  certificate  of a
senior  officer as to the  matters in clauses (i) and (ii) above dated as of the
Closing Date.

     (b) Purchaser's obligation to close shall be subject to the conditions that
(i) the conditions referred to in Sections 2(b) and 3 shall have been satisfied,
(ii) there shall be no  injunction  or order of any court or  government  agency
restraining or invalidating any of the  transactions  contemplated  hereby,  and
(iii) Purchaser shall have received opinions of Seller's counsel dated as of the
date  hereof  and as of the  Closing  date  in  form  and  substance  reasonably
satisfactory  to Purchaser and covering  such portion of the matters  covered by
Seller's and CVUSA's representations contained herein as are customarily covered
in legal opinions and subject to customary qualifications,  including an opinion
of FCC counsel substantially in the form attached.

     6.  Termination.  Either party which is not then in material  breach of its
obligations  hereunder may terminate this Agreement without liability by written
notice to the other  party if the  Closing  Date shall not have  occurred  on or
before January 31, 1999, provided,  however,  that upon Purchaser's notice given
at  least  10 days  prior  to the  date  that  termination  would  otherwise  be
permitted,  such date shall be  extended to June 30,  1999 and,  thereafter,  to
December 31, 1999 if (i) Purchaser is not in material  breach of its obligations
hereunder and (ii) on each such occasion  Purchaser  makes an additional Loan of
$3.5 million in principal amount to the Seller on  substantially  the same terms
as the Loans.  Purchaser may terminate  this  Agreement at any time if CVUSA has
not obtained stockholder approval of this transaction by October 10, 1998.

     7. Transaction  Expenses.  Except as otherwise provided in Section 2(a) and
Section 13, each of the parties hereto will be responsible  for its own expenses
(including  fees and expenses of legal counsel)  incurred in connection with the
transactions  contemplated  hereby,  provided  that as of the  Closing  Date (or
earlier  termination of this Agreement in accordance with its terms in a case in
which the expense reimbursement provision of Section 13 do not apply) Seller and
CVUSA  will  reimburse  Purchaser's  reasonable  fees and  expenses  of  counsel
incurred in connection  with the  negotiation  and  preparation of the documents
relating to the transactions  contemplated hereby,  including the Loans, and the
prosecution  of the FCC  applications  contemplated  hereby,  provided  that the
amount  of  such  fees  and  expenses  related  to  the   documentation  of  the
transactions  through the funding of the Initial Loan and prosecution of the FCC
applications contemplated hereby shall not exceed $50,000. Each party represents
to the other that it has not incurred any  liability  for a broker's or finder's
fee in connection with the transactions  contemplated hereby, except that Seller
is liable to  Wasserstein  Perella & Co., Inc. for fees in connection  with such
transactions.

     8.  Publicity;  Disclosure.  Without the prior approval of the other party,
neither of the parties hereto shall disclose to the public or to any third party
any information  concerning the  transactions  contemplated  hereby,  other than
disclosures to their  financial,  legal and other  advisors and to  governmental
authorities or the public as may, in the opinion of counsel, be required by law.
Notwithstanding the foregoing,  CVUSA shall be permitted to include in the proxy
statement  described  in  Section 13 hereof,  such  details of the  transactions
contemplated  hereby as may be required by law;  provided that  Purchaser  shall
have the right to review and comment  thereon prior to the proxy statement being
filed with the SEC or distributed. The parties will cooperate in the preparation
of a joint press release or coordinated  but separate press releases  announcing
the effectiveness of this Agreement as soon as it occurs pursuant to Section 12.
<PAGE>

     9. Access. Until the Closing,  CVUSA and Seller will give Purchaser and its
representatives  all access during  ordinary  business hours to the premises and
personnel of Seller and CVUSA and to all accounting, financial and other records
applicable  to Seller as  Purchaser  may  reasonably  request for the purpose of
confirming  compliance  with this  Agreement  and CVUSA  and shall  furnish  all
information  with respect to the business and affairs of Seller as Purchaser may
reasonably  request  for  such  purpose.  CVUSA  and  Seller  will  cause  their
executives, employees, attorneys and accountants to make themselves available to
provide reasonable cooperation to Purchaser in connection therewith.

     10.  Exclusivity.  Neither CVUSA nor Seller shall (nor shall either of them
permit their  representatives or stockholders to) discuss a possible sale, lease
or other  disposition  of or by  Seller  or CVUSA  (whether  by sale of stock or
assets or otherwise)  that is not  consistent  with the sale to Purchaser of the
850 MHz License  contemplated  hereby or provide any  information  in connection
therewith to any other party or enter into any  agreements or  commitments to do
the same.

     11.  Assignment.  This  Agreement  is  intended  to be a binding  agreement
between  Purchaser,  CVUSA and Seller and shall bind and inure to the benefit of
the successors  and assigns of such parties;  provided that CVUSA and Seller may
not  assign  their  rights  or  delegate  their  obligations  hereunder  without
Purchaser's prior written consent,  which will not be unreasonably withheld. The
Purchaser may assign its rights hereunder to any of its wholly-owned or majority
controlled  subsidiaries,  provided that no such  assignment of its rights shall
relieve Purchaser of any of its obligations hereunder.

     12.  Effectiveness.  Simultaneously with the execution and delivery of this
Agreement the following are expected to occur, upon the occurrence of which this
Agreement will come into full force and effect:

     (a)  Holders of not less than 39% of the issued and  outstanding  shares of
Common Stock of CVUSA shall have agreed to vote their shares as provided below;

     (b)  Seller  shall  have  executed  and  delivered  to  Purchaser  the Loan
Documentation, including arrangements with existing creditors as Purchaser shall
deem appropriate;

     (c) Purchaser  shall have received such opinions of Seller's  counsel as it
shall  reasonably  require in  connection  with FCC and  corporate  matters with
respect to the Loan  Documents,  the License and the  transactions  contemplated
hereby,   including,   if  Purchaser  so  requires,  a  favorable  opinion  from
Purchaser's FCC counsel to the effect that there is no reason to expect (i) that
the  transactions  contemplated  hereby  will  materially  adversely  affect the
regulatory  status  of  any of the  FCC  wireless  licenses  currently  held  by
Purchaser or any of its subsidiaries or (ii) that there is any reason to believe
that the disaggregation of spectrum is not permissible under applicable law.

     13. Shareholder Approval; Break-up fee; Events of Bankruptcy.

     (a) CVUSA has obtained the approval of a majority of its board of directors
to the transactions  contemplated hereby, and its board has recommended and will
continue to recommend,  so long as such  recommendation is consistent with their
fiduciary duties under applicable law, that its stockholders vote to approve the
transactions  contemplated  hereby.  CVUSA  will call a special  meeting  of its
stockholders  as  promptly as  practicable  for the  purpose of  obtaining  such
approval,  will file a preliminary proxy statement with respect thereto with the
Securities  and  Exchange  Commission  within  five  (5)  business  days  of the
execution of this Agreement and will distribute a definitive  proxy statement to
stockholders in accordance with applicable law, and use its best efforts to hold
such meeting and obtain such approval as quickly as possible.

     (b) In the event a petition for relief under 11 U.S.C.  ss.101 et seq. (the
"Bankruptcy Code") or similar State insolvency  statute,  is filed by or against
Seller or CVUSA, each Seller and CVUSA agree to (i) consent to entry of an order
for relief under Chapter 11 of the Bankruptcy Code; (ii) continue to comply with
the terms of this  Agreement;  and (iii) to the extent  necessary  for Seller or
CVUSA to continue to comply with the terms of this  Agreement,  seek  Bankruptcy
Court  approval of the sale  contemplated  by this  Agreement or take such other
action as may be necessary or advisable to allow Seller and CVUSA to continue to
comply with the terms of this Agreement.

     (c) in the  event  at any time on or  prior  to the  Closing  Date (i) this
Agreement is terminated by Seller or CVUSA (other than as a result of a material
breach  by  Purchaser)  and a court  determines  that  specific  enforcement  in
accordance  with the  provisions of Section 14(b) is not available to Purchaser,
or (ii) Purchaser  terminates this Agreement because CVUSA stockholder  approval
has not been obtained by October 10, 1998,  then Purchaser  shall be entitled to
the following as liquidated damages, and not as a penalty:

     (i) Expense  Reimbursement:  Seller and CVUSA jointly and  severally  shall
reimburse Purchaser for its actual and reasonable out-of-pocket expenses, not to
exceed  $325,000  (exclusive  of the  amounts  payable  pursuant  to  Section 7)
incurred in  furtherance  of this  Agreement and the  transactions  contemplated
herein,  including without limitation,  attorneys' fees and expenses incurred by
Purchaser for services of outside  counsel in negotiating  this  Agreement,  the
Loan Documents and all related  agreements,  performance  of due  diligence,  or
otherwise (the "Expense  Reimbursement").  Purchaser  shall submit to Seller and
CVUSA an itemized statement reflecting such actual reasonable  expenses.  Within
five (5) days thereafter,  Seller and CVUSA shall make an Expense Reimbursement.
This obligation  shall survive any  termination of this Agreement,  and shall be
secured  by the  collateral  under the  security  agreement  being  executed  in
relation to the Loans.


<PAGE>

     (ii) Termination Fee. Seller and CVUSA jointly and severally shall,  within
five  (5)  days  of such  termination,  pay  $1,625,000  to the  Purchaser  as a
termination  fee   ("Termination   Fee").  This  obligation  shall  survive  any
termination of this Agreement,  and shall be secured by the collateral under the
security agreement being executed in relation to the Loans.

     14.  Specific  Performance;   Miscellaneous;   Conflict  Waiver.  (a)  This
Agreement  shall be construed and enforced in accordance  with the internal laws
of the  State of New York.  This  Agreement  may be  executed  in any  number of
counterparts,  each of which  shall be an  original,  but which  together  shall
constitute one instrument.

     (b)  Notwithstanding  the  provisions  of Section  13(c)(i) and (ii), it is
understood  and agreed that money damages would not be an adequate  remedy for a
breach of the Agreement by Seller or CVUSA and that Purchaser  shall be entitled
to specific performance and injunctive or other equitable relief as a remedy for
any such  breach.  Seller  and  CVUSA  agree to waive  any  requirement  for the
securing  or posting of any bond in  connection  with such  remedy.  Such remedy
shall not be deemed to be the exclusive remedy for any such breach, but shall be
in addition to all other remedies available to Purchaser at law or in equity.

     (c) Each of the parties hereto  acknowledges  that Willkie Farr & Gallagher
regularly  acts as counsel for each of them,  and  consents to the fact that the
New York  office of such firm will  provide  corporate  (but not FCC)  advice to
CVUSA and Seller  (which  will  receive  FCC advice  from  other  counsel),  its
Washington  office will  provide FCC (but not  corporate)  advice to  Purchaser,
which is also represented by other counsel in this matter.

                            [Signature page follows]


<PAGE>




     IN WITNESS WHEREOF,  the undersigned have executed this Agreement as of the
date first above written.




                                 WINSTAR COMMUNICATIONS, INC.



                                 By:________________________
                                    Title:


Accepted and agreed as of July 10, 1998


CELLULARVISION USA, INC.




By:_______________________
   Printed name:
   Title:

         CELLULARVISION OF NEW YORK, L.P.

         By: CELLULARVISION CAPITAL CORP.,
                  its General Partner

         By:_____________________________
                  Title:





     Voting Agreement by Stockholders

     In consideration of the Purchaser executing the Agreement, the undersigned,
being the holders of not less than 39% outstanding  shares of the voting capital
stock of  CellularVision  USA, Inc.  which is entitled to vote a the approval of
the transactions  described  herein,  hereby expressly and irrevocably  agree to
vote all such  shares  in favor of  approval  of the  transactions  contemplated
hereby at any special  meeting of stockholders to be called for such purpose and
do hereby  agree to take such  actions as Purchaser  may  reasonably  request in
order to further evidence such approval and consent.



                                --------------------------------
                                 Shant Hovnanian



                                --------------------------------
                                 Vahak Hovnanian

        







                                 LOAN AGREEMENT


                            dated as of July 10, 1998


                                      among


                        CELLULARVISION OF NEW YORK, L.P.
                                (the "Borrower"),

                            CELLULARVISION USA, INC.
                                (the "Guarantor")

                                       and


                          WINSTAR COMMUNICATIONS, INC.
                                 (the "Lender")





<PAGE>



                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                                                               Page

<S>                                                                                                            <C>
ARTICLE 1.  DEFINITIONS; ACCOUNTING TERMS.........................................................................1
         Section 1.01.     Definitions............................................................................1
         Section 1.02.     Accounting Terms.......................................................................7

ARTICLE 2.  THE LOANS.............................................................................................8
         Section 2.01.     Loans..................................................................................8
         Section 2.02.     The Notes..............................................................................8
         Section 2.03.     Purpose................................................................................8
         Section 2.04.     Prepayments............................................................................8
         Section 2.05.     Interest and Principal.................................................................9

ARTICLE 3.  CONDITIONS PRECEDENT..................................................................................9
         Section 3.01.     Documentary Conditions Precedent.......................................................9

ARTICLE 4.  REPRESENTATIONS AND WARRANTIES.......................................................................11
         Section 4.01.     Organization, Good Standing and Due Qualification.....................................11
         Section 4.02.     Power and Authority of Borrower; No Conflicts.........................................11
         Section 4.03.     Corporate Power and Authority of Guarantor; No Conflicts..............................12
         Section 4.04.     Legally Enforceable Agreements........................................................12
         Section 4.05.     Litigation............................................................................13
         Section 4.06.     Ownership and Liens...................................................................13
         Section 4.07.     Taxes.................................................................................13
         Section 4.08.     ERISA.................................................................................13
         Section 4.09.     Subsidiaries and Affiliates...........................................................13
         Section 4.10.     Agreements............................................................................14
         Section 4.11.     Operation of Business.................................................................14
         Section 4.12.     No Default on Outstanding Judgments or Orders.........................................14
         Section 4.13.     No Defaults on Other Agreements.......................................................14
         Section 4.14.     Labor Disputes and Acts of God........................................................15
         Section 4.15.     Governmental Regulation...............................................................15
         Section 4.16.     No Forfeiture.........................................................................15

ARTICLE 5.  AFFIRMATIVE COVENANTS................................................................................15
         Section 5.01.     Maintenance of Existence..............................................................15
         Section 5.02.     Conduct of Business...................................................................15
         Section 5.03.     Maintenance of Properties.............................................................16
         Section 5.04.     Maintenance of Records................................................................16
         Section 5.05.     Maintenance of Insurance..............................................................16
         Section 5.06.     Compliance with Laws..................................................................16
         Section 5.07.     Right of Inspection...................................................................16
         Section 5.08.     Reporting Requirements................................................................16


                                        i

<PAGE>



ARTICLE 6.  NEGATIVE COVENANTS...................................................................................18
         Section 6.01.     Debt..................................................................................18
         Section 6.02.     Guaranties............................................................................18
         Section 6.03.     Liens.................................................................................19
         Section 6.04.     Sale and Leaseback....................................................................19
         Section 6.05.     Investments...........................................................................20
         Section 6.06.     Distributions.........................................................................20
         Section 6.07.     Sale of Assets........................................................................20
         Section 6.08.     Subsidiary Capital Stock..............................................................21
         Section 6.09.     Transactions with Affiliates and Subsidiaries.........................................21
         Section 6.10.     Mergers, Etc..........................................................................21
         Section 6.11.     Acquisitions..........................................................................22
         Section 6.12.     No Activities Leading to Forfeiture...................................................22
         Section 6.13.     Restrictions..........................................................................22

ARTICLE 7.  EVENTS OF DEFAULT....................................................................................22
         Section 7.01.     Events of Default.....................................................................22
         Section 7.02.     Remedies..............................................................................24

ARTICLE 8.  GUARANTY AND OTHER RIGHTS AND UNDERTAKINGS...........................................................25
         Section 8.01.  Guarantied Obligations...................................................................25
         Section 8.02.  Performance Under This Agreement.........................................................25
         Section 8.03.  Waivers..................................................................................26
         Section 8.04.  Releases.................................................................................27
         Section 8.05.  Marshaling...............................................................................28
         Section 8.06.  Liability................................................................................29
         Section 8.07.  Unconditional Obligation.................................................................29
         Section 8.08.  Election to Perform Obligations..........................................................29
         Section 8.09.  No Election..............................................................................29
         Section 8.10.  Severability.............................................................................30
         Section 8.11.  Other Enforcement Rights.................................................................30
         Section 8.12.  Delay or Omission; No Waiver.............................................................30
         Section 8.13.  Restoration of Rights and Remedies.......................................................30
         Section 8.14.  Cumulative Remedies......................................................................31
         Section 8.15.  Survival.................................................................................31

ARTICLE 9.  MISCELLANEOUS........................................................................................31
         Section 9.01.  Amendments and Waivers...................................................................31
         Section 9.02.  Usury....................................................................................31
         Section 9.03.  Expenses.................................................................................31
         Section 9.04.  Survival.................................................................................32
         Section 9.05.  Assignment...............................................................................32
         Section 9.06.  Notices..................................................................................32
         Section 9.07.  JURISDICTION; IMMUNITIES.................................................................33
         Section 9.08.  Subordination............................................................................34
         Section 9.09.  Table of Contents; Headings..............................................................34
         Section 9.10.  Severability.............................................................................34

                                       ii

<PAGE>



         Section 9.11.  Counterparts.............................................................................35
         Section 9.12.  Integration..............................................................................35
         Section 9.13.  GOVERNING LAW............................................................................36


EXHIBITS
         Exhibit A         Note
         Exhibit B         Security Agreement
         Exhibit C         Opinion of Counsel to the Obligors


SCHEDULES
         Schedule I        Subsidiaries and Affiliates
         Schedule II       Loan Arrangements; Liens
         Schedule III      Existing Guaranties
         Schedule IV       Litigation
</TABLE>


                                       iii

<PAGE>



                                 LOAN AGREEMENT

     LOAN AGREEMENT dated as of July 10, 1998 among  CELLULARVISION OF NEW YORK,
L.P., a limited  partnership  organized  under the laws of the State of Delaware
(the "Borrower"),  CELLULARVISION  USA, INC., a corporation  organized under the
laws of the State of Delaware (the "Guarantor" and,  together with the Borrower,
the "Obligors") and WINSTAR COMMUNICATIONS,  INC., a corporation organized under
the laws of the State of Delaware (the "Lender").

     The Obligors have  requested  that the Lender extend credit to the Borrower
and make loans to the Borrower,  the  repayment  which will be guarantied by the
Guarantor,  as provided in this  Agreement.  The Guarantor  will receive  direct
economic and financial  benefits from the Debt incurred under this Agreement and
the  incurrence  of such Debt is in the best  interests of the  Guarantor.  Each
Obligor  acknowledges that the Lender would not provide the financing  hereunder
but  for  the  obligations  of  such  Obligor  hereunder  with  respect  hereto.
Accordingly, the parties hereto agree as follows:

                    ARTICLE 1. DEFINITIONS; ACCOUNTING TERMS.

     Section 1.01.  Definitions.  As used in this Agreement the following  terms
have the following meanings (terms defined in the singular to have a correlative
meaning when used in the plural and vice versa):

     "Accounts"  shall have the meaning  assigned  to such term in the  Security
Agreement.

     "Acquisition"  means any  transaction  pursuant  to which any  Obligor  (a)
acquires equity securities (or warrants, options or other rights to acquire such
securities)  of any  Person,  (b) causes or permits any Person to be merged into
the Borrower or any  Subsidiary,  in any case pursuant to a merger,  purchase of
assets or any  reorganization  providing  for the  delivery  or  issuance to the
holders of such  Person's  then  outstanding  securities,  in exchange  for such
securities,  of cash or securities of any Obligor, or a combination  thereof, or
(c) purchases all or substantially all of the business or assets of any Person.


                                        1

<PAGE>



     "Affiliate" means any Person which directly or indirectly  controls,  or is
controlled by, or is under common control with, any Obligor.  The term "control"
means the  possession,  directly or indirectly,  of the power to direct or cause
the direction of the  management and policies of a Person,  whether  through the
ownership of voting securities, by contract, or otherwise.

     "Agreement"  means this Loan  Agreement,  as amended,  modified,  extended,
supplemented,  restated  and/or  replaced  from  time  to  time.  References  to
Articles,  Sections,  Exhibits,  Schedules  and the like refer to the  Articles,
Sections,  Exhibits,  Schedules and the like of this Agreement  unless otherwise
indicated.

     "Business  Day"  means for all  purposes,  any day other  than a  Saturday,
Sunday or legal  holiday on which  banks in New York,  New York are open for the
conduct of a substantial part of their commercial banking business.

     "Capital  Lease" means any lease which has been or should be capitalized on
the books of the lessee in accordance with GAAP.

     "Cash  Equivalents"  means (a) direct  obligations  of the United States of
America or any agency thereof with  maturities of one year or less from the date
of acquisition;  (b) commercial  paper of a domestic issuer rated at least "A-1"
by Standard & Poor's  Corporation or "P-1" by Moody's Investors  Service,  Inc.;
(c) certificates of deposit with maturities of one year or less from the date of
acquisition  issued by any commercial bank operating within the United States of
America  having  capital  and  surplus in excess of  $500,000,000;  or (d) money
market or mutual  funds whose sole  investments  are  comprised  of  investments
permitted under the foregoing clauses (a) through (c).

     "Closing Date" shall have the meaning assigned to such term in the Purchase
Agreement.

     "Code"  means  the  Internal  Revenue  Code  of  1986  and  the  rules  and
regulations  thereunder,  collectively,  as amended or supplemented from time to
time and remain in effect.


                                        2

<PAGE>



     "Collateral"  means all Property that is subject or is to be subject to the
Lien granted to the Lender by the Security Agreement.

     "Debt" means,  with respect to any Person:  (a) indebtedness of such Person
for borrowed money; (b) indebtedness for the deferred purchase price of Property
or services  (except trade  payables in the ordinary  course of  business);  (c)
Unfunded Benefit Liabilities of such Person; (d) liabilities under Guaranties of
Debt of any other  Person;  (e)  obligations  secured by any Lien on Property of
such Person; and (f) obligations of such Person as lessee under Capital Leases.

     "Default" means any event which with the giving of notice or lapse of time,
or both, would become an Event of Default.

     "Default  Rate" means,  with respect to the  principal of the Loans and, to
the extent  permitted  by law,  any other  amount  payable by any Obligor or the
Guarantor under this Agreement or any other Facility Document,  or any Note that
is not paid when due (whether at stated maturity, by acceleration or otherwise),
a rate per  annum  during  the  period  from and  including  the due date to but
excluding  the date on which such  amount is paid in full equal to four  percent
per annum above the interest rate established pursuant to Section 2.05.

     "Distribution"  means,  with  respect to any  Person,  the  declaration  or
payment of any dividends by such Person, or the purchase, redemption, retirement
or other  acquisition  for value of any of its  capital  stock now or  hereafter
outstanding,  or the making of any distribution of assets to its stockholders as
such whether in cash, assets or in obligations of such Person, or the allocation
or  other  setting  apart  of  any  sum  for  the  payment  of any  dividend  or
distribution on, or for the purchase,  redemption or retirement of any shares of
its capital  stock,  or the making of any other  distribution  by  reduction  of
capital or otherwise in respect of any shares of its capital stock.

     "Dollars"  and the sign "$" mean  lawful  money  of the  United  States  of
America.

     "ERISA"  means the Employee  Retirement  Income  Security  Act of 1974,  as
supplemented and amended from time to time,  including any rules and regulations
promulgated thereunder.

                                        3

<PAGE>



     "ERISA Affiliate" means any domestic United States  corporation or trade or
business  which is a member  of any  group of  organizations  (i)  described  in
Section  414(b)  or (c) of the Code of which  any  Borrower  or  Affiliate  is a
member,  or (ii)  solely for  purposes  of  potential  liability  under  Section
302(c)(11)  of ERISA and  Section  412(c)(11)  of the Code and the lien  created
under  Section  302(f) of ERISA and  Section  412(n) of the Code,  described  in
Section  414(m)  or (o) of the Code of which  any  Borrower  or  Affiliate  is a
member.

     "Event of Default" has the meaning given such term in Section 7.01.

     "Facility  Documents"  means  this  Agreement,   the  Notes,  the  Security
Agreement,  stock powers  executed by the  Guarantor,  UCC financing  statements
executed by the Borrower and the  Guarantor,  as debtor,  and all  certificates,
affidavits and other documents executed by the Borrower and/or the Guarantor and
relating to the  transactions  set forth in this  Agreement,  together  with any
amendments thereto as may from time to time be executed.

     "Forfeiture  Proceeding"  means any  action,  proceeding  or  investigation
affecting any Obligor or any of their  respective  Affiliates  before any court,
governmental department,  commission,  board, bureau, agency or instrumentality,
domestic or foreign, or the receipt of notice by any such party that any of them
is a suspect in or a target of any governmental inquiry or investigation,  which
may result in an  indictment  of any of them or the seizure or forfeiture of any
of their respective Properties.

     "GAAP" means generally accepted accounting  principles in the United States
of America as in effect from time to time, applied on a consistent basis.

     "Governmental Authority" means any nation or government, any state or other
political subdivision thereof and any entity exercising executive,  legislative,
judicial, regulatory or administrative functions of or pertaining to government.

     "Guaranty"  means,  with  respect to any Person,  guaranties,  endorsements
(other  than for  collection  in the  ordinary  course  of  business)  and other
contingent  obligations  of such Person with respect to the  obligations  of any

                                        4

<PAGE>


other  Person  (including,  but not limited  to, an  agreement  to purchase  any
obligation,  stock, assets, goods or services or to supply or advance any funds,
assets,  goods or services,  or an agreement to maintain or cause such Person to
maintain  a minimum  working  capital  or net worth or  otherwise  to assure the
creditors of any such other Person against loss).

     "Investment" as applied to the Borrower, the Guarantor and Affiliates means
the purchase or acquisition of any share of capital stock, partnership interest,
evidence of indebtedness or other equity security of any other person or entity,
any loan,  advance or extension of credit to, or contribution to the capital of,
any other  person or entity,  any real estate held for sale or  investment,  any
commodities  futures  contracts  held  other than in  connection  with bona fide
hedging  transactions,  any other investment in any other person or entity,  and
the making of any commitment or acquisition of any option to make an Investment.

     "Lien"  means  any  lien  (statutory  or  otherwise),   security  interest,
mortgage,  deed of trust,  priority,  pledge,  charge,  conditional  sale, title
retention  agreement,  financing lease or other  encumbrance or similar right of
others, or any agreement to give any of the foregoing.

     "Loan"  means an advance of funds to be made by the Lender to the  Borrower
pursuant to the terms of this Agreement.

     "Material  Adverse  Effect"  means any material  adverse  effect on (a) the
business,  profits,  Properties or condition of the Obligors and the Affiliates,
taken as a whole,  (b) the  ability of any  Obligor to perform  its  obligations
under each of the  Facility  Documents  to which it is a party,  (c) the binding
nature,  validity or enforceability of any of the Facility Documents and (d) the
validity,  perfection,  priority or  enforceability of the Liens in favor of the
Lender  securing  the Loans  hereunder  which,  in each case,  arises  from,  or
reasonably  could be expected to arise from, any action or omission of action on
the part of any Obligor or the  occurrence  of any event or the existence of any
fact or  condition  in  respect of any  Obligor,  an  Affiliate  or any of their
respective Properties.

     "Maturity  Date" means the  earliest of (i) the date on which the  Purchase
Agreement is terminated in accordance  with its terms,  (ii) the Closing Date or
(iii) January 31, 1999, as such date may be extended pursuant to Section 2.01.

                                        5

<PAGE>



     "Multiemployer Plan" means a Plan defined as such in Section 3(37) of ERISA
to which  contributions  have been made by any Borrower or any Subsidiary or any
ERISA Affiliate and which is covered by Title IV of ERISA.

     "Notes" means the promissory Notes of the Borrower in the form of Exhibit A
hereto  evidencing  the Loans made by the Lender  hereunder  and all  promissory
notes delivered in substitution or exchange therefor, as amended or supplemented
from time to time.

     "PBGC"  means the  Pension  Benefit  Guaranty  Corporation  and any  entity
succeeding to any or all of its functions under ERISA.

     "Person" means an individual,  partnership,  corporation,  business  trust,
joint  stock  company,  trust,   unincorporated   association,   joint  venture,
Governmental Authority or other entity of whatever nature.

     "Plan" means any employee  benefit or other plan established or maintained,
or to which  contributions  have been made, by any Borrower or Subsidiary or any
ERISA  Affiliate  and  which  is  covered  by Title IV of  ERISA,  other  than a
Multiemployer Plan.

     "Property"  means any  interest in any kind of  property or asset,  whether
real, personal or mixed, and whether tangible or intangible.

     "Purchase  Agreement"  means the Agreement to Purchase LMDS Licenses  dated
July 10, 1998 by and between the Lender, the Guarantor and the Borrower.

     "Purchase Money Lien" means a Lien on any Property  acquired by any Obligor
or Affiliate or placed on any  Property in order to finance the  acquisition  or
construction of such Property or the  construction  of  improvements  located on
such Property, or the assumption of any Lien on Property existing at the time of
the  acquisition  of such  Property or of the Person  holding such Property or a
Lien incurred in connection with any  conditional  sale or other title retention
agreement or a Capital Lease.

                                        6

<PAGE>



     "Regulation U" means  Regulation U of the Board of Governors of the Federal
Reserve System as the same may be amended or supplemented from time to time.

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

     "Security  Agreement" means the Security Agreement in the form of Exhibit B
to be  delivered  by the  Borrower  and the  Guarantor  under  the terms of this
Agreement, as amended or supplemented from time to time.

     "Subsidiary"  means,  with respect to any Person,  any corporation or other
entity  of  which at  least a  majority  of the  securities  or other  ownership
interest  having  ordinary  voting power  (absolutely or  contingently)  for the
election of directors or other persons  performing  similar functions are at the
time owned directly or indirectly by such Person.

     "Unconditional  Guaranty"  shall have the meaning  assigned to such term in
Section 10.01(a) of this Agreement.

     "Unfunded Benefit  Liabilities" means, with respect to any Plan, the amount
(if any) by which the  present  value of all  benefit  liabilities  (within  the
meaning of Section 4001 (a)(16) of ERISA) under the Plan exceeds the fair market
value of all Plan assets allocable to such benefit liabilities, as determined on
the most recent valuation date of the Plan and in accordance with the provisions
of ERISA for calculating the potential liability of any Borrower,  Subsidiary or
any ERISA Affiliate under Title IV of ERISA.

     Section 1.02.  Accounting  Terms.  All  accounting  terms not  specifically
defined  herein shall be construed in  accordance  with GAAP,  and all financial
data required to be delivered  hereunder  shall be prepared in  accordance  with
GAAP.


                                        7

<PAGE>



                              ARTICLE 2. THE LOANS.

     Section 2.01. Loans. Subject to the terms and conditions of this Agreement,
the Lender agrees to make an initial Loan to the Borrower on the Closing Date in
the amount of Three Million Five Hundred  Thousand Dollars  ($3,500,000.00).  In
addition, at the request of Borrower, given on five Business Days' prior written
notice at any time  after the  Borrower  has made the  filings  contemplated  by
Section 2(a)(i) of the Purchase  Agreement and the approval of the  stockholders
of the Guarantor  referred to in Sections 3 and 13 of the Purchase Agreement has
been obtained,  the Lender shall make an additional  Loan to the Borrower in the
amount  of Two  Million  Dollars  ($2,000,000.00).  If the  Lender,  in its sole
discretion,  extends the date before  which the  Purchase  Agreement  may not be
terminated  to June 30,  1999,  the  Lender  shall  make a  further  Loan to the
Borrower and if the Lender, in its sole discretion, extends such date thereafter
to  December  31,  1999,  the  Lender  shall make a second  further  Loan to the
Borrower,  each such  Loan to be in the  amount of Three  Million  Five  Hundred
Thousand Dollars  ($3,500,00.00),  and, in each such instance, the Maturity Date
shall likewise be extended.

     Section 2.02. The Notes.  Each Loan shall be evidenced by a promissory note
(the "Notes") in favor of the Lender in the form of Exhibit A, dated the date on
which such Loan is advanced to the Borrower,  and payable on the Maturity  Date,
as the same may be  extended  pursuant  to  Section  2.01,  duly  completed  and
executed by the Borrower and delivered by the Borrower to the Lender.

     Section 2.03. Purpose. The Borrower shall use the proceeds of the Loans for
general corporate purposes,  including working capital.  Such proceeds shall not
be used for the purpose, whether immediate, incidental or ultimate, of buying or
carrying "margin stock" within the meaning of Regulation U.

     Section 2.04.  Prepayments.  The Loans may be prepaid at any time,  without
premium or penalty,  upon one Business Day's Notice. Any interest accrued on the
amounts so prepaid to the date of such  payment  must be paid at the time of any
such prepayment.


                                        8

<PAGE>



     Section 2.05. Interest and Principal.

     (a) Interest shall accrue on the outstanding and unpaid principal amount of
the Loans for the period from the date on which it is  advanced to the  Borrower
to but  excluding  the Maturity  Date,  as the same may be extended  pursuant to
Section  2.01.  The Loans  shall  bear  interest  at a rate per  annum  equal to
eighteen percent,  except that they shall bear interest at the rate of seven and
one-half  percent per annum if the  transactions  contemplated  by the  Purchase
Agreement  are  consummated  on or before the Maturity  Date, as the same may be
extended  pursuant to Section 2.01. If the principal amount of the Loans and any
other  amount  payable by any  Obligor  hereunder,  under the Notes or under any
other  Facility  Document  shall not be paid when due (at  stated  maturity,  by
acceleration or otherwise),  interest shall accrue on such amount to the fullest
extent  permitted by law from and  including  such due date to but excluding the
date such  amount is paid in full at the  Default  Rate.  In no event  shall the
interest rate exceed the maximum amount allowed by law.

     (b) On the Maturity  Date, as the same may be extended  pursuant to Section
2.01,  the  Borrower  shall pay the  entire  amount of the Loans  together  with
interest accrued thereon and all other sums outstanding  hereunder and under the
Facility  Documents.  If, on or before  the  Maturity  Date,  as the same may be
extended pursuant to Section 2.01, the transactions contemplated by the Purchase
Agreement are consummated,  payment shall be made by the offset by the Lender of
amounts due it  hereunder  and under the Notes  against  amounts  payable by the
Lender pursuant to the Purchase Agreement.

                        ARTICLE 3. CONDITIONS PRECEDENT.

     Section 3.01.  Documentary  Conditions  Precedent.  The  obligations of the
Lender to make the initial Loan are subject to the condition  precedent that the
Lender shall have received on or before the Closing Date each of the  following,
in form and substance reasonably satisfactory to the Lender and its counsel:

     (a)  counterparts of this Agreement  executed by each of the Borrower,  the
Guarantor and the Lender;

                                        9

<PAGE>



     (b) a Note duly executed by the Borrower;

     (c) the Security Agreement duly executed by the Borrower, the Guarantor and
the Lender together with (i) executed copies of the financing statements (UCC-1)
in recordable form necessary for filing under the Uniform Commercial Code of all
jurisdictions  necessary or, in the opinion of the Lender,  desirable to perfect
the security  interests of the Lender in and to the Collateral  described in the
Security  Agreement;  (ii) stock  certificates  representing  all of the capital
stock of  CellularVision  Capital Corp., a New Jersey  corporation  which is the
sole general partner of the Borrower; (iii) certificates representing all of the
outstanding limited partnership interests of the Borrower; and (iv) stock powers
executed in blank by the holders of the preceding items (ii) and (iii);

     (d)  certificates  of the  Secretary or Assistant  Secretary of each of the
Borrower  and the  Guarantor,  dated the  Closing  Date,  (i)  attesting  to all
corporate action taken by such Borrower and the Guarantor, including resolutions
of its Board of Directors authorizing the execution, delivery and performance of
each of the Facility Documents to which it is a party and each other document to
be delivered by the Borrower and the Guarantor pursuant to this Agreement,  (ii)
certifying the names and true signatures of the officers of the Borrower and the
Guarantor  authorized to sign the Facility  Documents to which it is a party and
each other document to be delivered by the Borrower and the Guarantor under this
Agreement and (iii)  verifying that the agreement of limited  partnership or the
charter and by-laws, as appropriate,  of the Borrower and the Guarantor attached
thereto are true, correct and complete as of the date thereof;

     (e) a  certificate  of a duly  authorized  officer of the  Borrower and the
Guarantor,  dated  the  Closing  Date,  stating  that  the  representations  and
warranties  in Article 4 are true and correct on such date as though made on and
as of  such  date  and  that no  event  has  occurred  and is  continuing  which
constitutes a Default or Event of Default;

     (f)  good  standing  certificates,  tax  good  standing  certificates,  and
certified  copies of all charter  documents with respect to the Borrower and the
Guarantor  certified by the appropriate  public official of its  jurisdiction of
incorporation, and evidence that the Borrower and the Guarantor

                                       10

<PAGE>



each is qualified as a foreign limited partnership or corporation in every other
jurisdiction in which it does business;

     (g) a favorable opinion of Willkie Farr & Gallagher, counsel to each of the
Obligors,  dated the Closing Date, in substantially the form of Exhibit C and as
to such other matters as the Lender may reasonably request; and

     (h) the Borrower shall have made arrangements  with its existing  creditors
as the Lender shall deem appropriate.

     The  obligations  of the Lender to make a Loan other than the initial  Loan
shall be subject to the condition  precedent that the Lender shall have received
on or before the date such Loan is to be  advanced a  certificate  to the effect
set forth in paragraph (e), above.

                   ARTICLE 4. REPRESENTATIONS AND WARRANTIES.

     Each of the Obligors hereby represents and warrants that:

     Section  4.01.  Organization,  Good  Standing  and Due  Qualification.  The
Borrower and the Guarantor each is duly organized,  validly existing and in good
standing under the laws of the jurisdiction of its  organization,  has the power
and  authority to own its assets and to transact the business in which it is now
engaged or proposed to be engaged,  and is duly  qualified as a foreign  limited
partnership  or  corporation  and in good standing  under the laws of each other
jurisdiction in which such qualification is required.

     Section 4.02. Power and Authority of Borrower; No Conflicts. The execution,
delivery  and  performance  by the  Borrower  of this  Agreement  and the  other
Facility  Documents  to which it is a party  have  been duly  authorized  by all
necessary partnership action and do not and will not: (a) require any consent or
approval of its partners not heretofore  obtained;  (b) contravene its agreement
of limited  partnership;  (c)  violate any  provision  of, or require any filing
(other than the filing of financing statements required pursuant to the terms of

                                       11

<PAGE>


the Security Agreement), registration, consent or approval under, any law, rule,
regulation (including, without limitation, Regulation U), order, writ, judgment,
injunction,   decree,   determination   or  award  presently  in  effect  having
applicability to it; (d) subject to the completion of the arrangements  referred
to in Section 3.01(h),  result in a breach of or constitute a default or require
any  consent  under  any  indenture  or loan or credit  agreement,  or any other
agreement,  lease  or  instrument  to  which it is a party or by which it or its
Properties may be bound or affected;  (e) result in, or require, the creation or
imposition  of any Lien (other than as created  under the  Security  Agreement),
upon or with respect to any of the Properties now owned or hereafter acquired by
it; or (f) cause it to be in  default  under  any such  law,  rule,  regulation,
order, writ, judgment,  injunction,  decree,  determination or award or any such
indenture, agreement, lease or instrument.

     Section 4.03. Corporate Power and Authority of Guarantor; No Conflicts. The
execution,  delivery and  performance by the Guarantor of this Agreement and the
other Facility Documents to which it is a party have been duly authorized by all
necessary  corporate  action and do not and will not: (a) require any consent or
approval of its stockholders; (b) contravene its charter or by-laws; (c) violate
any  provision  of, or require any filing  (other  than the filing of  financing
statements   required  pursuant  to  the  terms  of  the  Security   Agreement),
registration,  consent or approval under, any law, rule, regulation  (including,
without limitation,  Regulation U), order, writ, judgment,  injunction,  decree,
determination  or award  presently  in effect  having  applicability  to it; (d)
result in a breach of or  constitute a default or require any consent  under any
indenture  or loan  or  credit  agreement,  or any  other  agreement,  lease  or
instrument to which it is a party or by which it or its  Properties may be bound
or affected;  (e) result in, or require,  the creation or imposition of any Lien
(other than as created  under the Security  Agreement),  upon or with respect to
any of the Properties now owned or hereafter  acquired by it; or (f) cause it to
be in default  under any such law,  rule,  regulation,  order,  writ,  judgment,
injunction,  decree,  determination  or award or any such indenture,  agreement,
lease or instrument.

     Section 4.04.  Legally  Enforceable  Agreements.  Each Facility Document to
which any Obligor is a party is, or when delivered under this Agreement will be,
a legal, valid and binding obligation of such Obligor  enforceable  against such
Obligor in accordance with its terms, except to the extent that such enforcement
may be limited by  applicable  bankruptcy,  insolvency  and other  similar  laws
affecting creditors' rights generally.

                                       12

<PAGE>



     Section  4.05.  Litigation.  Except as listed in Schedule  IV, there are no
material  actions,  suits or  proceedings  pending or, to the  knowledge  of any
Obligor, threatened,  against or affecting such Obligor or any of its Affiliates
before any court, Governmental Authority or arbitrator.

     Section 4.06.  Ownership  and Liens.  The Borrower , the Guarantor and each
Affiliate has title to, or valid leasehold  interests in, all of its Properties,
and none of the  Properties  owned or  leased by any of them is  subject  to any
Lien,  except as may be permitted  hereunder and except for the Liens created by
the Security Agreement.

     Section 4.07.  Taxes. Each of the Obligors and its Affiliates has filed all
tax  returns  (federal,  state and local)  required to be filed and has paid all
taxes,  assessments  and  governmental  charges and levies  thereon then due and
payable, including interest and penalties, if applicable.

     Section 4.08.  ERISA.  Each Plan and, to the best knowledge of any Obligor,
Multiemployer Plan, is in compliance in all material respects with, and has been
administered  in all  material  respects  in  compliance  with,  the  applicable
provisions of ERISA, the Code and any other applicable Federal or state law, and
no event or condition is occurring or exists concerning which the Borrower,  the
Guarantor or any  Affiliate  would be under an obligation to furnish a report to
the Lender in  accordance  with Section  6.08(k)  hereof.  As of the most recent
valuation date for each Plan, each Plan was "fully  funded",  which for purposes
of this  Section 4.08 shall mean that the fair market value of the assets of the
Plan  is not  less  than  the  present  value  of the  accrued  benefits  of all
participants  in the Plan,  computed on a Plan  termination  basis.  To the best
knowledge of any  Obligor,  no Plan has ceased being fully funded as of the date
these representations are made with respect to any Loan under this Agreement.

     Section 4.09.  Subsidiaries and Affiliates.  Schedule I sets forth the name
of each Subsidiary of the Guarantor and each Affiliate, in each case showing the
jurisdiction of its  incorporation or organization and showing the percentage of
each  Person's  ownership  of  the  outstanding  stock  of  such  Subsidiary  or
Affiliate.  All of the outstanding  shares of capital stock of each  Subsidiary,
either directly or indirectly, are validly issued, fully paid and nonassessable,
and all such shares or  interests  are owned free and clear of all Liens  (other


                                       13

<PAGE>



than as created under the Security  Agreement).  Except as set forth on Schedule
I, no Obligor  or  Affiliate  owns or holds the right to  acquire  any shares of
stock or any other security or interest in any other Person.

     Section 4.10. Agreements. Schedule II is a complete and correct list of all
credit  agreements,   indentures,   purchase  agreements  (except  for  purchase
agreements of inventory in the ordinary course of business), guaranties, Capital
Leases and other investments, agreements and arrangements presently in effect in
excess of  $50,000  (the  "Loan  Arrangements")  providing  for or  relating  to
extensions of credit (including  agreements and arrangements for the issuance of
letters of credit or for  acceptance  financing) in respect of which any Obligor
or any of its Affiliates is in any manner  directly or  contingently  obligated;
and the maximum principal or face amounts of the credit in question, outstanding
and which can be outstanding,  are correctly stated, and all Liens of any nature
given or agreed to be given as security  therefor  are  correctly  described  or
indicated in such Schedule.

     Section 4.11. Operation of Business.  The Borrower,  the Guarantor and each
Affiliate  possesses all licenses,  permits,  franchises,  patents,  copyrights,
trademarks  and  trade  names,  or  rights  thereto,  to  conduct  the  business
substantially  as  conducted  and as  presently  proposed to be  conducted,  and
neither the  Borrower,  the  Guarantor  nor any Affiliate is in violation of any
valid rights of others with respect to any of the foregoing.

     Section 4.12. No Default on  Outstanding  Judgments or Orders.  Each of the
Obligors and its  respective  Affiliates  has  satisfied  all  judgments  and no
Obligor or Affiliate is in default  with  respect to any final  judgment,  writ,
injunction,  decree,  rule or  regulation  of any court,  arbitrator or federal,
state,  municipal or other Governmental  Authority,  commission,  board, bureau,
agency or instrumentality, domestic or foreign.

     Section 4.13. No Defaults on Other Agreements. No Obligor or Affiliate is a
party to any indenture, loan or credit agreement or any lease or other agreement
or instrument or subject to any charter or other  restriction which could have a
Material Adverse Effect. No Obligor or Affiliate is in default in any respect in
the performance, observance or fulfillment of any of the  obligations, covenants

                                       14

<PAGE>



or conditions  contained in any agreement or instrument material to its business
to which it is a party.

     Section 4.14.  Labor Disputes and Acts of God. Neither the business nor the
Properties of the  Borrower,  the Guarantor or any Affiliate are affected by any
fire,  explosion,  accident,  strike,  lockout or other labor dispute,  drought,
storm,  hail,  earthquake,  embargo,  act of God or of the public enemy or other
casualty  (whether  or not  covered by  insurance),  which could have a Material
Adverse Effect.

     Section 4.15. Governmental Regulation.  Neither the Borrower, the Guarantor
or any  Affiliate  is subject to  regulation  under the Public  Utility  Holding
Company Act of 1935, the Investment Company Act of 1940, the Interstate Commerce
Act, the Federal Power Act or any statute or regulation  limiting its ability to
incur indebtedness for money borrowed as contemplated hereby.

     Section 4.16. No Forfeiture.  Neither any Obligor nor any of its Affiliates
is  engaged in or  proposes  to be engaged  in the  conduct of any  business  or
activity  which  could  result  in a  Forfeiture  Proceeding  and no  Forfeiture
Proceeding against any of them is pending or threatened.

                        ARTICLE 5. AFFIRMATIVE COVENANTS.

     So long as the Notes shall remain  unpaid,  each Obligor and its respective
Affiliates shall:

     Section 5.01. Maintenance of Existence. Preserve and maintain its existence
and good  standing  in the  jurisdiction  of its  organization,  and qualify and
remain  qualified  as a  foreign  corporation  or  limited  partnership  in each
jurisdiction in which such qualification is required.

     Section  5.02.  Conduct of Business.  Continue to engage in the business of
the same general type as conducted by it on the date of this Agreement.


                                       15

<PAGE>



     Section 5.03. Maintenance of Properties. Maintain, keep and preserve all of
its Properties necessary or useful in the proper conduct of its business in good
working order and condition, ordinary wear and tear excepted.

     Section 5.04.  Maintenance of Records.  Keep adequate  records and books of
account,  in  which  complete  entries  will be made in  accordance  with  GAAP,
reflecting all financial transactions of Borrower,  each Subsidiary Guarantor or
Affiliate.

     Section  5.05.  Maintenance  of  Insurance.  Maintain  business  insurance,
liability  insurance and insurance against fire and other risks with financially
sound and  reputable  insurance  companies or  associations  in such amounts and
covering such risks as are usually carried by companies engaged in the same or a
similar  business and  similarly  situated but no less than that required by law
and satisfactory to the Lender.

     Section  5.06.  Compliance  with  Laws.  Comply  in all  respects  with all
applicable  laws,  rules,  regulations  and orders,  such compliance to include,
without  limitation,  paying  before  the  same  become  delinquent  all  taxes,
assessments and governmental charges imposed upon it or upon its property.

     Section 5.07.  Right of  Inspection.  Annually and at any other  reasonable
time and from time to time,  permit  the  Lender or any agent or  representative
thereof,  at Borrower's  reasonable  cost and expense to examine and make copies
and abstracts from the records and books of account of, and visit the Properties
and  inspect  the  Collateral  of, such  Obligor,  and to discuss  the  affairs,
finances and accounts of such Obligor with him, its officers and  directors  and
independent accountants, as applicable.

     Section 5.08. Reporting Requirements. Furnish directly to the Lender:

     (a)  promptly  after  the  commencement  thereof,  notice  of all  material
actions,  suits,  and  proceedings  before any court or  Governmental  Authority
affecting any Obligor or its Affiliates;


                                       16

<PAGE>



     (b) as  soon  as  possible  and in any  event  within  10  days  after  the
occurrence  of each Default or Event of Default a written  notice  setting forth
the details of such Default or Event of Default and the action which is proposed
to be taken by the applicable Obligor with respect thereto;

     (c) copies of all reports  and forms  filed with  respect to all pension or
other employee  benefit plans under ERISA,  except as filed in the normal course
of business and that would not result in an adverse  action to be taken by ERISA
and each annual  report  filed  pursuant to Section 104 of ERISA with respect to
each Plan  (including,  to the  extent  required  by Section  104 of ERISA,  the
related  financial and actuarial  statements  and opinions and other  supporting
statements,  certifications,  schedules and  information  referred to in Section
103) and each annual  report filed with respect to each Plan under  Section 4065
of ERISA;  provided,  however,  that in the case of a  Multiemployer  Plan, such
annual  reports  shall be furnished  only if they are available to any Borrower,
Subsidiary Guarantor or an ERISA Affiliate;

     (d)  promptly  after the  sending  or filing  thereof,  copies of all proxy
statements,  financial statements and reports which the Borrower,  the Guarantor
or Affiliate sends to its  stockholders or partners,  and copies of all regular,
periodic  and  special  reports,  and  all  registration  statements  which  the
Borrower,  the  Guarantor or Affiliate  files with the  Securities  and Exchange
Commission or any Governmental  Authority which may be substituted  therefor, or
with any  national  securities  exchange  except  those as prepaid in the normal
course of business and that would not result in an adverse action to be taken by
any such agencies;

     (e) promptly after the  commencement  thereof or promptly after any Obligor
knows  of  the  commencement  or  threat  thereof,   notice  of  any  Forfeiture
Proceeding; and

     (f)  within  thirty  (30)  days of a  request  by the  Lender,  such  other
information respecting the condition or operations,  financial or otherwise,  of
any Obligor or Affiliate as the Lender may from time to time reasonably request,
including but not limited to,  schedules  detailing  operating  costs,  accounts
receivables agings, projections and inventory summary schedules.


                                       17

<PAGE>



                         ARTICLE 6. NEGATIVE COVENANTS.

     So  long  as the  Notes  shall  remain  unpaid,  no  Obligor  or any of its
respective  Affiliates  shall directly or indirectly,  without the prior written
consent of the Lender;

     Section 6.01. Debt. Create,  incur,  assume,  suffer or permit to exist any
Debt, except:

     (a) Debt under this Agreement, the Notes and the other Facility Documents;

     (b) Debt outstanding on the Closing Date and set forth on Schedule II;

     (c) Debt consisting of Guaranties permitted pursuant to Section 6.02;

     (d) Debt  secured by a Purchase  Money Lien for the  purchase of  equipment
after the date of this Agreement:

     (e) Debt  that is  unsecured  and  fully  subordinated  to Debt owed to the
Lender in a manner satisfactory to the Lender in its sole discretion; and

     (f) Debt owed to the Lender.

     Section 6.02. Guaranties.  Assume,  guarantee,  endorse or otherwise become
directly or contingently responsible or liable for any Guaranty except:

     (a) the Unconditional Guaranty by the Guarantor hereunder;

     (b)  Guaranties by  endorsement  of negotiable  instruments  for deposit or
collection or similar transactions in the ordinary course of business;

     (c) existing  Guaranties of Debt set forth on Schedule III, which shall not
be increased or modified; and

                                       18

<PAGE>



     (d)  Guaranties  by the  Borrower,  the  Guarantor  or an  Affiliate  of an
obligation  of a Subsidiary  of the Borrower or a Subsidiary of the Guarantor or
Affiliate  issuing the Guaranty,  provided the obligation that is the subject of
the Guaranty is not an obligation that the Borrower,  the Guarantor or Affiliate
is  prohibited  from  entering into pursuant to the terms of any of the Facility
Documents.

     Section 6.03.  Liens.  Create,  incur,  assume or suffer to exist any Lien,
upon or with respect to any of its Properties,  now owned or hereafter acquired,
except:

     (a) Liens in favor of the Lender;

     (b) Liens for taxes or assessments or other government charges or levies if
not yet due and payable;

     (c) Liens imposed by law, such as  mechanic's,  materialmen's,  landlord's,
warehousemen's   and  carrier's  Liens,   and  other  similar  Liens,   securing
obligations  incurred in the ordinary  course of business which are not past due
for more than 60 days;

     (d) Liens under  workmen's  compensation,  unemployment  insurance,  social
security or similar legislation (other than ERISA);

     (e) Purchase Money Liens granted with respect to equipment  purchased after
the date of this Agreement; and

     (f) Existing Liens described on Schedule II.

     Section 6.04. Sale and Leaseback.  Sell,  transfer or otherwise  dispose of
any  real  or  personal  Property  to any  Person  and  thereafter  directly  or
indirectly lease back the same or similar Property.


                                       19

<PAGE>



     Section 6.05. Investments. Make any Investment, except:

     (a) cash or Cash Equivalents;

     (b) Property to be used or useful in the ordinary course of business of the
Borrower or the Guarantor or Affiliate; and

     (c) for customary collection arrangements for accounts receivable.

     Section 6.06. Distributions. Make any Distribution, except that:

     (a) the Borrower may make Distributions payable solely in its common stock;
and

     (b) any Subsidiary may make Distributions to the Borrower.

     Section 6.07. Sale of Assets.  Sell, lease,  assign,  transfer or otherwise
dispose of any of its now owned or hereafter acquired assets (including, without
limitation,  shares  of  stock  and  indebtedness,   receivables  and  leasehold
interests); except:

     (a) the licenses to be sold pursuant to the Purchase Agreement;

     (b)  assets  used  exclusively  in  connection  with  Borrower's  broadcast
television business;

     (c) for inventory disposed of in the ordinary course of business; and

     (d) the sale or other disposition of assets no longer used or useful in the
conduct of its business.


                                       20

<PAGE>



     Section 6.08.  Subsidiary Capital Stock. Issue, sell or exchange,  agree or
obligate itself to issue, sell or exchange, any additional shares of its capital
stock,  sell or otherwise  dispose of any shares of capital  stock of any of its
Subsidiaries,  or permit any such  Subsidiary to issue any additional  shares of
its capital stock, or form or acquire any additional Subsidiaries.

     Section 6.09.  Transactions with Affiliates and Subsidiaries.  (a) Make any
Investment in an Affiliate or a Subsidiary of any Obligor;  (b) transfer,  sell,
lease,  assign or  otherwise  dispose  of any  Property  to any  Affiliate  or a
Subsidiary of the Borrower or the Guarantor;  (c) merge into or consolidate with
or  purchase or acquire  Property  from any  Affiliate  or a  Subsidiary  of the
Borrower or the Guarantor;  or (d) enter into any other transaction  directly or
indirectly  with or for the  benefit of any  Affiliate  or a  Subsidiary  of the
Borrower  or  the  Guarantor  (including,  without  limitation,  guaranties  and
assumption  of  obligations  of any Affiliate or a Subsidiary of the Borrower or
the  Guarantor);  provided that (x) any Affiliate who is an individual may serve
as a director,  officer or employee of the Borrower or the Guarantor and receive
reasonable  compensation  for his or her  services in such  capacity and (y) the
Borrower or the Guarantor may enter into transactions (other than Investments by
the Borrower or the Guarantor in any Affiliate or the Subsidiary of the Borrower
or the Guarantor)  providing for the sale of inventory and other Property in the
ordinary  course of business if the monetary or business  consideration  arising
therefrom  would  be  substantially  as  advantageous  to  the  Borrower  or the
Guarantor  as the  monetary or business  consideration  which would  obtain in a
comparable  arm's  length  transaction  with  a  Person  not an  Affiliate  or a
Subsidiary  of the Borrower or the  Guarantor,  provided  that the Guarantor may
acquire issued and outstanding  shares of VisionStar,  Inc. in exchange for Debt
permitted  pursuant  to Section  6.01(e)  and any  Obligor  may  accept  capital
contributions, in kind or in cash, from Affiliates.

     Section 6.10.  Mergers,  Etc. Merge or consolidate  with, or sell,  assign,
lease or  otherwise  dispose of  (whether in one  transaction  or in a series of
transactions)  all or  substantially  all of its  assets  (whether  now owned or
hereafter  acquired) to, any Person,  or acquire all or substantially all of the
assets or the  business of any Person (or enter into any  agreement to do any of
the foregoing), except as may be set forth in the Purchase Agreement.


                                       21

<PAGE>



     Section 6.11. Acquisitions. Make any Acquisition other than the acquisition
of shares of  VisionStar,  Inc. and interests in  CellularVision  Technologies &
Telecommunications,  L.P., its general  partner,  as a contribution  to capital,
pursuant to Section 6.09.

     Section 6.12. No Activities Leading to Forfeiture.  Engage in or propose to
be engaged in the conduct of any business or activity which could  reasonably be
expected to result in a Forfeiture Proceeding.

     Section  6.13.  Restrictions.  Enter into or suffer to exist any  agreement
with any Person  that  prohibits,  requires  the  consent of such  Person for or
limits the ability of (i) the  Borrower or the  Guarantor  or  Affiliate  to pay
dividends or make other  distributions  or pay Debt owed to any other Obligor or
Affiliate,  make loans or advances to any other Obligor or Affiliate or transfer
any of its  Property  which  constitutes  Collateral  to any  other  Obligor  or
Affiliate,  (ii) any Obligor or Affiliate to create,  incur, assume or suffer to
exist any Lien upon any of its Property or revenues which constitute  Collateral
under the Security Agreement,  whether now owned or hereafter acquired, or (iii)
any Obligor or Affiliate to enter into any  modification  or  supplement  of the
Facility Documents.


                          ARTICLE 7. EVENTS OF DEFAULT.

     Section 7.01.  Events of Default.  Any of the following  events shall be an
"Event of Default":

     (a) the Borrower  shall fail to pay the  principal or interest of a Note on
or before the date when due and payable;

     (b) any representation or warranty made or deemed made in this Agreement or
in any  other  Facility  Document  or which  is  contained  in any  certificate,
document,  opinion,  financial or other statement furnished at any time under or
in connection  with any Facility  Document shall prove to have been incorrect in
any material respect on or as of the date made or deemed made;


                                       22

<PAGE>



     (c) (i) any Obligor  shall fail to observe  any  covenant on its part to be
observed in Article 6 of this  Agreement  and such  failure  shall  continue for
fifteen (15)  consecutive  days; or (ii) any Obligor (other than as specifically
referred  to  elsewhere  in this  Section  7.01) fails to perform or observe any
term,  covenant  or  agreement  on its part to be  performed  or observed in any
Facility Document.

     (d) any Obligor or Affiliate  shall:  (i) fail to pay any  indebtedness  in
excess of $50,000,  including but not limited to indebtedness for borrowed money
(other than the payment obligations  described in (a) above), of such Obligor or
Affiliate,  or any interest or premium  thereon,  when due (whether by scheduled
maturity, required prepayment,  acceleration, demand or otherwise); or (ii) fail
to  perform  or  observe  any  term,  covenant  or  condition  on its part to be
performed or observed  under any  agreement or  instrument  relating to any such
indebtedness,  when required to be performed or observed,  if the effect of such
failure to perform or observe is to  accelerate,  or to permit the  acceleration
of, after the giving of notice or passage of time, or both, the maturity of such
indebtedness;  or any such indebtedness shall be declared to be due and payable,
or  required  to be  prepaid  (other  than  by a  regularly  scheduled  required
prepayment), prior to the stated maturity thereof;

     (e) any Obligor, or Affiliate: (i) shall generally not, or be unable to, or
shall admit in writing its inability to, pay its debts as such debts become due;
or (ii) shall make an assignment for the benefit of creditors, petition or apply
to any tribunal for the  appointment of a custodian,  receiver or trustee for it
or a  substantial  part of its assets;  or (iii) shall  commence any  proceeding
under  any  bankruptcy,  reorganization,   arrangement,  readjustment  of  debt,
dissolution or liquidation  law or statute of any  jurisdiction,  whether now or
hereafter  in effect;  or (iv) shall have had any such  petition or  application
filed or any such proceeding shall have been commenced,  against it, in which an
adjudication  or  appointment  is made or order for relief is entered,  or which
petition,  application or proceeding remains undismissed for a period of 30 days
or more; or shall be the subject of any proceeding under which its assets may be
subject to seizure,  forfeiture  or  divestiture;  or (v) by any act or omission
shall indicate its consent to, approval of or acquiescence in any such petition,
application or proceeding or order for relief or the appointment of a custodian,


                                       23

<PAGE>


receiver or trustee for all or any  substantial  part of its  Property;  or (vi)
shall suffer any such  custodianship,  receivership  or  trusteeship to continue
undischarged for a period of 30 days or more;

     (f) one or more  judgments,  decrees or orders for the  payment of money in
excess of $50,000 in the aggregate  shall be rendered  against any Obligor,  the
Individual Guarantor or Affiliate;

     (g) The Unfunded  Benefit  Liabilities  of one or more Plans have increased
after the date of this Agreement in an amount which is material;

     (h) (i)  CellularVision  Capital  Corp.  shall  have  ceased to be the sole
general partner of the Borrower;  or (ii) the Guarantor shall have ceased to own
all of the outstanding capital stock of CellularVision Capital Corp.;

     (i) (i) any Forfeiture  Proceeding  shall have been commenced;  or (ii) the
Lender has a good faith basis to believe that a Forfeiture  Proceeding  has been
threatened or commenced;

     (j) the  Security  Agreement  shall at any time  after  its  execution  and
delivery and for any reason  cease:  (i) to create a valid and  perfected  first
priority  security  interest in and to the  Property  purported to be subject to
such agreement; or (ii) to be in full force and effect or shall be declared null
and void,  or the validity or  enforceability  thereof shall be contested by any
Obligor or other  Person or any  Obligor or other  Person  shall deny it has any
further  liability or obligation under the Security  Agreement or any Obligor or
other Person shall fail to perform any of its obligations thereunder; or

     (k) the  Purchase  Agreement  shall have been  terminated  or either of the
Borrower or the Guarantor  shall be in material breach of any of its obligations
under the Purchase Agreement.

     Section  7.02.  Remedies.  If any  Event  of  Default  shall  occur  and be
continuing,  the Lender may by notice to the  Borrower  declare the  outstanding
principal  of all of the  Notes,  all  interest  thereon  and all other  amounts
payable under this Agreement and the  Notes  to  be  forthwith  due and payable,

                                       24

<PAGE>



whereupon the Notes,  all such interest and all such amounts shall become and be
forthwith  due and  payable,  without  presentment,  demand,  protest or further
notice of any kind, all of which are hereby expressly waived by the Borrower and
the Guarantor;  provided that, in the case of an Event of Default referred to in
Section 7.01(e) or Section 7.01(k) above,  the Notes,  all interest  thereon and
all other amounts  payable under this  Agreement  shall be  immediately  due and
payable without notice, presentment, demand, protest or other formalities of any
kind,  all of  which  are  hereby  expressly  waived  by the  Borrower  and  the
Guarantor.

             ARTICLE 8. GUARANTY AND OTHER RIGHTS AND UNDERTAKINGS.

     Section 8.01. Guarantied  Obligations.  The Guarantor,  in consideration of
the execution and delivery of this Agreement by the Lender,  hereby  irrevocably
and  unconditionally  guarantees to the Lender,  as and for the  Guarantor's own
debt, until final payment has been made:

     (a) the due and punctual  payment by the Borrower of the  principal of, and
interest on, the Notes at any time  outstanding  and all other amounts  payable,
and all other indebtedness  owing, by each of the Obligors under (i) each of the
Facility  Documents to which it is a party and (ii) the Purchase  Agreement (all
such  obligations  so  guarantied  are herein  collectively  referred  to as the
"Guarantied  Obligations"),  in each case when and as the same shall  become due
and payable, whether at maturity,  pursuant to mandatory or optional prepayment,
by  acceleration  or otherwise,  all in accordance with the terms and provisions
hereof and thereof,  it being the intent of the Guarantor  that the guaranty set
forth in this Section 8.01 (the "Unconditional Guaranty") shall be a guaranty of
payment and not a guaranty of collection; and

     (b)  the  punctual  and  faithful  performance,  keeping,  observance,  and
fulfillment by any Obligor of all duties, agreements,  covenants and obligations
of such Obligor  contained  in each of the  Facility  Documents to which it is a
party and the Purchase Agreement.

     Section 8.02.  Performance Under This Agreement.  In the event the Borrower
fails to make, on or before the due date  thereof,  any payment of the principal
of, or  interest  on, the Notes or of any other  amounts  payable,  or any other
indebtedness  owing, under  any  of  the  Facility  Documents  or  the  Purchase
                                       25

<PAGE>



Agreement or if the Borrower shall fail to perform,  keep,  observe,  or fulfill
any other  obligation  referred  to in clause (a) or clause (b) of Section  8.01
hereof in the  manner  provided  in the  Notes or in any of the  other  Facility
Documents or the Purchase  Agreement,  the Guarantor shall cause forthwith to be
paid the moneys, or to be performed,  kept, observed,  or fulfilled each of such
obligations, in respect of which such failure has occurred.

     Section  8.03.  Waivers.  To the  fullest  extent  permitted  by  law,  the
Guarantor does hereby waive:

     (a) notice of acceptance of the Unconditional Guaranty;

     (b)  notice  of any  borrowings  under  this  Agreement,  or the  creation,
existence or acquisition of any of the  Guarantied  Obligations,  subject to the
Guarantor's  right to make inquiry of the Lender to ascertain  the amount of the
Guarantied Obligations at any reasonable time;

     (c)  notice of the  amount of the  Guarantied  Obligations,  subject to the
Guarantor's  right to make inquiry of the Lender to ascertain  the amount of the
Guarantied Obligations at any reasonable time;

     (d) notice of adverse  change in the  financial  condition of the Borrower,
any other Guarantor or any other fact that might increase the  Guarantor's  risk
hereunder;

     (e) notice of presentment for payment,  demand, protest, and notice thereof
as to the Notes or any other instrument;

     (f) notice of any Default or Event of Default;

     (g) all other notices and demands to which the Guarantor might otherwise be
entitled (except if such notice or demand is specifically  otherwise required to
be given to the Guarantor hereunder or under the other Facility Documents);


                                       26

<PAGE>



     (h) the right by statute or  otherwise  to require the Lender to  institute
suit  against the  Borrower or to exhaust the rights and  remedies of the Lender
against the Borrower,  the Guarantor  being bound to the payment of each and all
Guarantied Obligations,  whether now existing or hereafter accruing, as fully as
if  such  Guarantied  Obligations  were  directly  owing  to the  Lender  by the
Guarantor;

     (i) any defense arising by reason of any disability or other defense (other
than the  defense  that the  Guarantied  Obligations  shall  have been fully and
finally  performed  and  indefeasibly  paid) of the Borrower or by reason of the
cessation from any cause  whatsoever of the liability of the Borrower in respect
thereof; and

     (j) any stay  (except  in  connection  with a pending  appeal),  valuation,
appraisal,  redemption  or extension  law now or at any time  hereafter in force
which,  but for this waiver,  might be applicable to any sale of Property of the
Guarantor made under any judgment,  order or decree based on this Agreement, and
the Guarantor covenants that it will not at any time insist upon or plead, or in
any manner claim or take the benefit or advantage of such law.

Until all of the  Guarantied  Obligations  shall  have  been  paid in full,  the
Guarantor  hereby agrees to  completely  subordinate  any right of  subrogation,
reimbursement,  or  indemnity  whatsoever  in respect  thereof  and any right of
recourse to or with respect to any assets or Property of the  Borrower.  Nothing
shall discharge or satisfy the obligations of the Guarantor hereunder except the
full  and  final   performance  and  indefeasible   payment  of  the  Guarantied
Obligations by the Guarantor as provided  herein and the Facility  Documents and
the Purchase Agreement,  upon which the Lender agrees to transfer and assign its
interest in the Notes to the  Guarantors  without  recourse,  representation  or
warranty  of any kind  (other  than that the Lender  owns the Notes and that the
Notes is free of Liens created by the Lender). All of the Guarantied Obligations
shall in the  manner  and  subject to the  limitations  provided  herein for the
acceleration of the Notes forthwith become due and payable without notice.

     Section 8.04.  Releases.  The Guarantor  consents and agrees that,  without
notice to or by it and  without  affecting  or  impairing  the joint and several
obligations of the Guarantor hereunder or under any other Facility Document, the


                                       27

<PAGE>



the Lender, in the manner provided herein, by action or inaction, may:

     (a) compromise or settle, extend the period of duration or the time for the
payment,  or discharge the  performance  of, or may refuse to, or otherwise not,
enforce,  or may, by action or inaction,  release all or any one or more parties
to, the Notes or the other Facility Documents;

     (b) grant other indulgences to the Borrower in respect thereof;

     (c) amend or modify  in any  manner  and at any time (or from time to time)
the Notes and the other  Facility  Documents in accordance  with Section 9.01 or
otherwise;

     (d) release or substitute any one or more of the endorsers or guarantors of
the Guaranteed  Obligations  whether parties hereto or any Facility  Document or
not; and

     (e)  exchange,  enforce,  waive,  or release,  by action or  inaction,  any
security for the Guarantied Obligations (including,  without limitation,  any of
the collateral therefor) or any other guaranty of the Notes.

     Section 8.05. Marshaling. The Guarantor consents and agrees that:

     (a) the Lender shall be under no  obligation to marshal any assets in favor
of the  Guarantor  or  against  or in  payment  of any or all of the  Guarantied
Obligations; and

     (b) to the extent the  Borrower  makes a payment or payments to the Lender,
which  payment or payments or any part  thereof  are  subsequently  invalidated,
declared to be fraudulent or  preferential,  set aside, or required,  for any of
the foregoing  reasons or for any other  reason,  to be repaid or paid over to a
custodian,  trustee,  receiver,  or any other  party under any  bankruptcy  law,
common law, or equitable cause, then to the extent of such payment or repayment,
the obligation or part thereof intended to be satisfied thereby shall be revived


                                       28

<PAGE>


and  continued  in full force and effect as if said  payment or payments had not
been made and the Guarantor shall be primarily liable for such obligation.

     Section 8.06. Liability.  The Guarantor agrees that its liability shall not
be  contingent  upon the  exercise  or  enforcement  by the  Lender of  whatever
remedies  the Lender may have  against  the  Borrower  or the  Guarantor  or the
enforcement of any Lien or  realization  upon any security the Lender may at any
time possess.

     Section 8.07.  Unconditional  Obligation.  The  Unconditional  Guaranty set
forth  in  this  Article  8  is  an  absolute,  unconditional,   continuing  and
irrevocable  guaranty of payment and  performance and shall remain in full force
and  effect  until  the full and final  payment  of the  Guarantied  Obligations
without respect to future changes in conditions,  including change of law or any
invalidity  or  irregularity  with respect to the issuance or  assumption of any
obligations (including, without limitation, the Notes) of or by the Borrower, or
with respect to the execution and delivery of any agreement (including,  without
limitation, the Notes and the other Facility Documents) of the Borrower.

     Section  8.08.  Election  to  Perform  Obligations.  Any  election  by  the
Guarantor to pay or  otherwise  perform any of the  obligations  of the Borrower
under the Notes or under any of the other Facility  Documents,  whether pursuant
to this Article 8 or otherwise,  shall not release the Borrower or the Guarantor
from such obligations or any of its other  obligations  under the Notes or under
any of the other Facility Documents.

     Section 8.09. No Election. The Lender shall have the right to seek recourse
against  the  Guarantor  to the  fullest  extent  provided  for  herein  for the
Guarantor's  obligations under this Agreement  (including,  without  limitation,
this  Article 8) in respect of the Notes.  No election to proceed in one form of
action  or  proceeding,  or  against  any  party,  or on any  obligation,  shall
constitute a waiver of the Lender's right to proceed in any other form of action
or proceeding or against  other parties  unless the Lender has expressly  waived
such right in writing.  Specifically, but without limiting the generality of the
foregoing,  no action or proceeding by the Lender against the Borrower under any
document or  instrument  evidencing obligations  of  the  Borrower to the Lender

                                       29

<PAGE>



shall serve to diminish the  liability  of the  Guarantor  under this  Agreement
(including,  without  limitation,  this Article 8) except to the extent that the
Lender finally and unconditionally shall have realized payment by such action or
proceeding, notwithstanding the effect of any such action or proceeding upon the
Guarantor's right of subrogation against the Borrower.

     Section 8.10. Severability. Subject to Article 7 hereof and applicable law,
each of the rights and remedies  granted  under this Article 8 to the Lender may
be exercised by the Lender without notice by the Lender to, or the consent of or
any other action by, the Lender.

     Section 8.11. Other Enforcement Rights. The Lender may proceed, as provided
in Article 8 hereof, to protect and enforce the  Unconditional  Guaranty by suit
or suits or proceedings in equity, at law or in bankruptcy,  and whether for the
specific  performance of any covenant or agreement  contained herein (including,
without  limitation,  in this  Article  8) or in  execution  or aid of any power
herein  granted;  or for the  recovery of judgment  for the  obligations  hereby
guarantied or for the enforcement of any other proper, legal or equitable remedy
available under applicable law.

     Section  8.12.  Delay or Omission;  No Waiver.  No course of dealing on the
part of the Lender  and no delay or  failure  on the part of any such  Person to
exercise any right hereunder  (including,  without  limitation,  this Article 8)
shall  impair  such  right or  operate  as a waiver of such  right or  otherwise
prejudice such Person's rights,  powers and remedies hereunder.  Every right and
remedy  given  by the  Unconditional  Guaranty  or by law to the  Lender  may be
exercised from time to time as often as may be deemed expedient by such Person.

     Section 8.13.  Restoration of Rights and Remedies. If the Lender shall have
instituted any proceeding to enforce any right or remedy under the Unconditional
Guaranty,  the Notes, the Security  Agreement or any other Facility  Document or
the Purchase  Agreement,  and such  proceeding  shall have been  discontinued or
abandoned for any reason, or shall have been determined adversely to the Lender,
then and in every such case the Lender,  the Borrower and each Guarantor  shall,
except as may be limited or affected by any determination in such proceeding, be
restored severally and respectively to its respective former positions hereunder
and thereunder, and thereafter, subject as  aforesaid,  the rights and  remedies

                                       30

<PAGE>



of the Lender shall continue as though no such proceeding had been instituted.

     Section  8.14.   Cumulative  Remedies.   No  remedy  under  this  Agreement
(including,  without limitation,  this Article 8), the Notes or any of the other
Facility Documents is intended to be exclusive of any other remedy, but each and
every remedy shall be  cumulative  and in addition to any and every other remedy
given hereunder this Agreement (including,  without limitation, this Article 8),
under the Notes or under any of the other  Facility  Documents  or the  Purchase
Agreement.

     Section 8.15.  Survival.  So long as the Guarantied  Obligations  shall not
have been fully and finally performed and indefeasibly  paid, the obligations of
the  Guarantor  under this Article 10 shall  survive the transfer and payment of
the Notes.

                            ARTICLE 9. MISCELLANEOUS.

     Section 9.01. Amendments and Waivers. No provision of this Agreement may be
amended,  waived or modified  unless such  amendment,  waiver or modification is
evidenced by an instrument in writing signed by the Obligors and the Lender.  No
failure on the part of the Lender to exercise,  and no delay in exercising,  any
right  hereunder  shall  operate as a waiver  thereof or  preclude  any other or
further exercise thereof or the exercise of any other right. The remedies herein
provided are cumulative and not exclusive of any remedies provided by law.

     Section 9.02. Usury. Anything herein to the contrary  notwithstanding,  the
obligations  of the Borrower under this Agreement and the Notes shall be subject
to the limitation  that payments of interest shall not be required to the extent
that receipt  thereof would be contrary to  provisions of law  applicable to the
Lender  limiting  rates of  interest  which may be charged or  collected  by the
Lender.

     Section 9.03.  Expenses.  Each Obligor shall reimburse the Lender on demand
for all reasonable costs, expenses, and charges (including,  without limitation,
reasonable  fees and charges of external  legal  counsel and costs  allocated by
internal  legal  departments)  incurred  by the  Lender in  connection  with the
performance or enforcement of this Agreement or  the other Facility Documents or

                                       31

<PAGE>



the  Purchase  Agreement.  Each Obligor  agrees to indemnify  the Lender and its
directors,  officers,  employees and agents from, and hold each of them harmless
against, any and all losses,  liabilities,  claims, damages or expenses incurred
by any of them arising out of or by reason of any investigation or litigation or
other proceedings (including any threatened investigation or litigation or other
proceedings)  relating to or arising out of this Agreement or the other Facility
Documents or the  Purchase  Agreement  or any of the  transactions  contemplated
thereunder or any remedial or other action taken by any Obligor or the Lender in
connection  with  compliance  by  any  Obligor,   or  any  of  their  respective
Properties,   with  any  law,  including  without   limitation,   the  fees  and
disbursements of counsel  incurred in connection with any such  investigation or
litigation or other  proceedings  (but  excluding any such losses,  liabilities,
claims, damages or expenses incurred by reason of the gross negligence or wilful
misconduct of the Person to be indemnified).

     Section 9.04. Survival.  The obligations of the Obligors under Section 9.03
shall survive the repayment of the Loans.

     Section 9.05.  Assignment.  This Agreement shall be binding upon, and shall
inure  to  the  benefit  of,  Obligors  and  the  Lender  and  their  respective
successors,  assigns,  heirs and rep resentatives,  as applicable except that no
Obligor may assign or transfer their rights or obligations hereunder. The Lender
may assign all or any part of its rights and  obligations  under this  Agreement
(including,  without limitation, all or a portion of the Loans and the Notes) to
any entity, in which event in the case of an assignment,  upon notice thereof by
the Lender to the  Borrower,  the  assignee  shall  have,  to the extent of such
assignment (unless otherwise provided  therein),  the same rights,  benefits and
obligations as it would have if it were the Lender hereunder.

     Section 9.06.  Notices.  Unless the party to be notified otherwise notifies
the other party in writing as provided in this Section,  and except as otherwise
provided in this  Agreement,  notices shall be given to the Lender by telephone,
confirmed by telex,  telecopy or other writing,  and to the Obligors by ordinary
mail,  return receipt  requested,  or telecopier  addressed to such party at its
address on the signature page of this Agreement. Notices shall be effective: (a)
if given by mail,  72 hours after  deposit in the mails with first class postage
prepaid,  addressed  as  aforesaid;  and (b) if  given by  telecopier,  when the
telecopy is transmitted to the  telecopier  number  as  aforesaid; provided that

                                       32

<PAGE>



notices to the Lender shall be effective upon receipt.  A copy of any notices to
an Obligor  relating to an Event of Default shall be delivered to Willkie Farr &
Gallagher, 787 Seventh Avenue, New York, New York 10019-6099;  Attention:  Bruce
R. Kraus, Esq.;  provided however,  that failure to provide such copy to Willkie
Farr & Gallagher will not otherwise  affect the validity or effectiveness of the
notice delivered to an Obligor.

     Section 9.07. JURISDICTION; IMMUNITIES. (a) EACH OBLIGOR HEREBY IRREVOCABLY
SUBMITS TO THE JURISDICTION OF ANY NEW YORK STATE OR UNITED STATES FEDERAL COURT
SITTING IN NEW YORK  COUNTY  OVER ANY  ACTION OR  PROCEEDING  ARISING  OUT OF OR
RELATING TO THIS AGREEMENT,  THE NOTES OR THE OTHER FACILITY DOCUMENTS, AND EACH
OBLIGOR HEREBY  IRREVOCABLY  AGREES THAT ALL CLAIMS IN RESPECT OF SUCH ACTION OR
PROCEEDING  MAY BE HEARD AND DETERMINED IN SUCH NEW YORK STATE OR FEDERAL COURT.
EACH OBLIGOR  IRREVOCABLY  CONSENTS TO THE SERVICE OF ANY AND ALL PROCESS IN ANY
SUCH  ACTION OR  PROCEEDING  BY THE  MAILING  OF COPIES OF SUCH  PROCESS TO SUCH
OBLIGOR AT ITS ADDRESS  SPECIFIED IN SECTION  9.06.  EACH OBLIGOR  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. EACH OBLIGOR FURTHER WAIVES ANY OBJECTION TO VENUE IN THE STATE
OF NEW YORK AND ANY  OBJECTION TO AN ACTION OR  PROCEEDING  IN NEW YORK STATE ON
THE BASIS OF FORUM NON  CONVENIENS.  EACH OBLIGOR FURTHER AGREES THAT ANY ACTION
OR PROCEEDING  BROUGHT  AGAINST THE BANK SHALL BE BROUGHT ONLY IN NEW YORK STATE
OR UNITED  STATES  FEDERAL COURT  SITTING IN NEW YORK.  EACH OBLIGOR  WAIVES ANY
RIGHT IT MAY HAVE TO JURY TRIAL.

     (b) Nothing in this  Section  9.07 shall  affect the right of the Lender to
serve legal process in any other manner  permitted by law or affect the right of
the  Lender to bring any  action or  proceeding  against  any  Obligor  or their
respective Properties in the courts of any other jurisdictions.

                                       33

<PAGE>



     (c) To the  extent  that any  Obligor  has or  hereafter  may  acquire  any
immunity from  jurisdiction of any court or from any legal process (whether from
service or notice, attachment prior to judgment, attachment in aid of execution,
execution or  otherwise)  with respect to itself or its  Property,  each Obligor
hereby irrevocably waives such immunity in respect of its obligations under this
Agreement, the Notes and the other Facility Documents.

     Section 9.08.  Subordination.  Each Obligor  hereby agrees that any Debt or
other  intercompany  receivable  or advance of any other  Obligor,  directly  or
indirectly,  in favor of such Obligor of whatever nature at any time outstanding
shall be completely subordinate in right of payment to the prior payment in full
of the  Notes  and all  other  obligations  owing by such  Obligor  or any other
Obligor under each of the Facility Documents to which it is a party, and that no
payment on any such Debt or  intercompany  receivables or advances shall be made
except intercompany  receivables and advances permitted pursuant to the terms of
this  Agreement  may be repaid in the ordinary  course of business so long as no
Default or Event of Default shall have occurred and be continuing.  In the event
that any payment on any such Debt or intercompany receivable or advance shall be
received by such  Obligor  other than as  permitted  by this Section 9.08 before
payment in full of the Notes and all other  obligations owing by such Obligor or
any other Obligor  under each of the Facility  Documents to which it is a party,
such  Obligor  shall  receive  such  payment and hold the same in trust for, and
shall  immediately pay over to, the Lender all such sums to the extent necessary
so that the  Lender  shall  have paid all  obligations  owed or which may become
owing to it under the Notes or any other Facility Document.

     Section 9.09.  Table of Contents;  Headings.  Any table of contents and the
headings and captions  hereunder are for  convenience  only and shall not affect
the interpretation or construction of this Agreement.

     Section 9.10.  Severability.  The provisions of this Agreement are intended
to be severable. If for any reason any provision of this Agreement shall be held
invalid or unenforceable in whole or in part in any jurisdiction, such provision
shall, as to such jurisdiction,  be ineffective to the extent of such invalidity
or   unenforceability   without  in  any  manner   affecting   the  validity  or
enforceability  thereof in any other  jurisdiction  or the remaining  provisions

                                       34

<PAGE>


hereof in any jurisdiction.  Without limiting the foregoing,  to the extent that
mandatory  and  non-waivable  provisions of applicable  law  (including  but not
limited to any  applicable  laws  pertaining  to fraudulent  conveyance  and any
applicable business  corporation laws) otherwise would render the full amount of
any  Obligor's  obligations  hereunder  and under the other  Facility  Documents
invalid or  unenforceable,  such Obligor's  obligations  hereunder and under the
other Facility  Documents  shall be limited to the maximum amount which does not
result in such invalidity of the foregoing.

     Section 9.11. Counterparts. This Agreement may be executed in any number of
counterparts,  all of which taken  together  shall  constitute  one and the same
instrument,  and any party hereto may execute this Agreement by signing any such
counterpart.

     Section  9.12.  Integration.  The Facility  Documents  set forth the entire
agreement  among the parties hereto  relating to the  transactions  contemplated
thereby and  supersede any prior oral or written  statements or agreements  with
respect to such transactions.

     [The balance of this page is intentionally blank]

                                       35

<PAGE>



     Section  9.13.  GOVERNING  LAW.  THIS  AGREEMENT  SHALL BE GOVERNED BY, AND
INTERPRETED AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

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

                                  CELLULARVISION OF NEW YORK, L.P.
                                  By: CELLULARVISION CAPITAL CORP.,
                                        General Partner


                                   By:_________________________________________
                                   Name:   Shant Hovnanian
                                   Title:  Chairman & Chief Executive Officer


                                  CELLULARVISION USA, INC.


                                  By:__________________________________________
                                  Name:   Shant Hovnanian
                                  Title:  Chairman & Chief Executive Officer

                              Address for Notices (for Borrower and Guarantor):
                              140 58th Street -- Lot 7E
                              Brooklyn, New York 11220
                              Telephone:  718-489-1227
                              FAX: 718-489-1235


                                  WINSTAR COMMUNICATIONS, INC.


                                  By:__________________________________________
                                  Name:      Timothy R. Graham
                                  Title:     Executive Vice President

                              Address for Notices:
                              230 Park Avenue, Suite 3126
                              New York, New York 10169
                              Telephone: 212-584-4000
                              FAX:       212-922-1637

                                       36

<PAGE>


 

                               SECURITY AGREEMENT

     SECURITY  AGREEMENT  (the  "Agreement"),  dated as of July 10, 1998, by and
among  CELLULARVISION  OF NEW YORK,  L.P., a Delaware  limited  partnership (the
"Company"),  CELLULARVISION USA, INC., a Delaware  corporation  ("Parent"),  and
WINSTAR  COMMUNICATIONS,  INC., a  corporation  organized  under the laws of the
State of Delaware ("Lender").

     WHEREAS,  the  Company,  Parent and the Lender have entered into (i) a Loan
Agreement (as may be amended from time to time, the "Loan  Agreement")  dated as
of the date hereof,  providing for, among other things, the making of loans (the
"Loans" and the  promissory  notes issued by the Company to the Lender  pursuant
thereto  are herein  referred to as the  "Notes"),  in the  aggregate  principal
amount of up to  $12,500,000,  and (ii) a Purchase  Agreement (as defined in the
Loan Agreement)  providing for the sale by the Company to the lender of the "850
MHz License" (as defined in the Purchase Agreement);

     WHEREAS,  the  Company,  Parent  and the  lender  have  entered  into  this
Agreement for the purpose of granting a security  interest in the Collateral (as
defined in this  Agreement)  in order to secure the  Obligations  (as defined in
this Agreement) for the benefit of the Lender;

     NOW, THEREFORE,  in consideration of the premises, the terms and conditions
set forth  herein and other good and  valuable  consideration,  the  receipt and
sufficiency to which are hereby acknowledged, the parties hereto hereby agree as
follows:

1.       GENERAL DEFINITIONS.

     1.1  Defined  Terms.  When  used  herein,  the  following  terms  have  the
respective  meanings  set  forth  below  or set  forth  in the  Section  of this
Agreement following such term:

     Accounts -- Section 2.1 (a)(i).

     Affiliate -- has the meaning given such term in the Loan Agreement.

                                        1

<PAGE>



     Agreement -- this Security Agreement, as may be amended from time to time.

     Collateral -- Section 2.1 (c).

     Company -- the first paragraph of this Agreement.

     Control -- means the  possession,  directly or indirectly,  of the power to
direct  or cause the  direction  of the  management  and  policies  of a Person,
whether through the ownership of voting securities, by contract or otherwise.

     850 MHz  License  -- has  the  meaning  given  such  term  in the  Purchase
Agreement.

     Event of Default -- Section 3.1.

     Fair Market  Value -- at any time with respect to any  Property,  means the
sale value of such  Property that would be realized in an  arm's-length  sale at
such time  between an informed  and willing  buyer,  and an informed and willing
seller, under no compulsion to buy or sell, respectively.

     FCC -- Federal Communications Commission.

     Insurance  Policies -- insurance  policies  covering  loss or damage to the
Collateral by fire, theft,  explosion,  spoilage and all other hazards and risks
against which the Company insures the Collateral.

     Interests -- Section 2.1(b)(i).

     Inventory -- Section 2.1 (a)(ii).


                                        2

<PAGE>



     Investments  -- all  investments,  made in cash or by delivery of Property,
whether by acquisition of stock,  indebtedness or other  obligation or Security,
or by loan, advance or capital contribution, or otherwise.

     Lender -- the first paragraph of this Agreement.

     Lien -- any interest in Property securing an obligation owed to, or a claim
by, a Person  other than the owner of the  Property,  whether  such  interest is
based on the common law,  statute or contract,  and including but not limited to
the security interest or lien arising from a mortgage, assignment,  encumbrance,
pledge,  conditional  sale or trust receipt or a lease,  consignment or bailment
for security purposes.  The term "Lien" shall include reservations,  exceptions,
encroachments,  easements, rights-of-way,  covenants, conditions,  restrictions,
leases and other title exceptions and encumbrances affecting Property owned by a
Person.  For the purposes of this Agreement,  a Person shall be deemed to be the
owner of any Property  which it has acquired or holds  subject to a  conditional
sale agreement or other arrangement  pursuant to which title to the Property has
been retained by or vested in some other Person for security purposes.

     Loan Agreement - the first recital of this Agreement.

     Loans -- the first recital of this Agreement.

     Notes -- the first recital of this Agreement.

     Obligations  --  collectively,  (i) the unpaid  principal  of, and interest
(including,  without  limitation,  interest  accruing  at the  default  rate and
interest  accruing at the applicable rate on or after the filing of any petition
in bankruptcy,  or the  commencement of any insolvency,  reorganization  or like
proceeding,  relating  to the  Company  or  Parent,  whether  or not a claim for
post-filing  or  post-petition  interest is allowed in such  proceeding)  on the
Notes and all other obligations and liabilities of the Company and Parent to the
Lender, whether direct  or  indirect, absolute  or  contingent, due or to become

                                        3

<PAGE>



due, or now existing or hereafter incurred, which may arise under, out of, or in
connection  with, the Loan  Agreement,  the Notes,  this Agreement and any other
document made, delivered or given in connection  therewith or herewith,  whether
on account of principal, interest, reimbursement obligations, fees, indemnities,
costs,  expenses (including,  without limitation,  all fees and disbursements of
counsel to the Lender) or  otherwise  and (ii) any and all  payments  due to the
Lender from the Company and Parent pursuant to the Purchase Agreement including,
without  limitation,  the "Expense  Reimbursement" and the "Termination Fee" (as
each is defined therein).

     Parent -- the first paragraph of this Agreement.

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

     Pledged Securities -- Section 2.1 (b)(i).

     Property -- any  interest in any kind of property or asset,  whether  real,
personal or mixed, or tangible or intangible.

     Purchase Agreement -- the first recital of this Agreement.

     Security -- shall have the same meaning as set forth in Section 2(1) of the
Securities Act of 1933, as amended.

     Security  Interest -- shall mean the  security  interest in the  Collateral
granted to the Lender hereunder.

     Shares -- Section 2.1 (b)(i).


                                        4

<PAGE>



     Subsidiary  -- at any time means a  corporation  of which the Parent  owns,
directly  or  indirectly,  more than  fifty  percent  (50%) of all of the equity
Securities (and Securities convertible into equity Securities) and Voting Stock.

     Voting  Stock  --  means  capital  stock  of  any  class  or  classes  of a
corporation   the   holders  of  which  are   ordinarily,   in  the  absence  of
contingencies,  entitled  to elect a majority  of the  corporate  directors  (or
Persons performing similar functions).

     1.2 Other Terms.  All other terms  contained in this Agreement  shall have,
when  the  context  so  indicates,  the  meanings  provided  for by the  Uniform
Commercial  Code of the  State  of New York to the  extent  the same are used or
defined therein.

2.   COLLATERAL.

     2.1 Security  Interest in the Collateral.  (a) To secure the prompt payment
and performance of the Obligations  when and as due, the Company and Parent each
hereby  grants  to the  Lender  a  continuing  security  interest  in and to all
Property of each of the Company  and Parent,  including  but not limited to, the
Property  specified below in this Section 2.1 (a), whether now owned or existing
or hereafter acquired or arising and wheresoever located:

          (i) all accounts,  accounts receivable,  contract rights related to or
     arising from any  account,  notes,  documents,  chattel  paper,  instrument
     acceptances,  drafts or other forms of obligations and receivables  arising
     from the sale or  lease  of  inventory  or  rendition  of  services  in the
     ordinary course of business or otherwise (collectively, the "Accounts");

          (ii) all inventory  (whether held for sale or lease or to be furnished
     under contracts of service), raw materials,  work in process, and materials
     used or consumed in the conduct of business, including all goods, inventory
     

                                        5

<PAGE>


     and  merchandise  returned by or reclaimed or  repossessed  from  customers
     wherever such goods,  inventory and merchandise are located  (collectively,
     the "Inventory");

          (iii) all  machinery,  equipment,  fixtures,  furnishings,  furniture,
     appliances and motor vehicles (whether certificated or not);

          (iv)  all  general  intangibles,  including  but  not  limited  to all
     patents,  patent  applications,   copyrights,   trademarks,   trade  names,
     licenses,  permits, deposit accounts,  contract rights, royalty rights, tax
     refunds,  unearned  insurance  premium  refunds,  insurance or condemnation
     proceeds  (whether  or  not  representing   proceeds  of  other  Collateral
     described in this Section 2.1 (a)), choses and rights-in-action, beneficial
     interests  in any trust,  joint  venture or  partnership  rights,  warranty
     rights,  certificates,  rights under  consulting,  service,  non-compete or
     other  similar  agreements,  blueprints  and  drawings,  but not  including
     licenses granted to the Company or Parent by the FCC;

          (v) all moneys,  investment  property and Property of any kind, now or
     at any time or times  hereafter,  in the possession or under the control of
     the Lender or a bailee of the Lender;

          (vi) all  proceeds  from the sale or  other  disposition  of  licenses
     granted to the Company or Parent by the FCC;

          (vii)  all  accessions  to,  substitutions  for and all  replacements,
     products  and proceeds of the  Property  described  in clauses  2.1(a) (i),
     (ii),  (iii),  (iv),  (v) and (vi) above,  including,  without  limitation,
     proceeds of the Insurance Policies; and

          (viii) all books and records (including, without limitation,  customer
     lists,  credit files,  computer  programs,  printouts,  and other  computer
     materials  and  records)  pertaining  to any of the  Property  described in
     clauses 2.1 (a) (i), (ii), (iii), (iv), (v), (vi) and (vii) above.


                                        6

<PAGE>



     (b) To secure the prompt payment and  performance of the  Obligations  when
and as due, Parent hereby grants to the Lender a continuing security interest in
and to all  Property  of the  Parent  specified  below in this  Section  2.1 (b)
whether now owned or existing or hereafter  acquired or arising and  wheresoever
located:

          (i) (A) the  shares  of stock  described  in  Exhibit  A  hereto  (the
     "Shares"),  which shares represent one hundred percent (100%) of the issued
     and outstanding shares of capital stock of CellularVision Capital Corp. and
     all securities convertible or exchangeable into such capital stock, (B) all
     limited partnership  interests in the Company (the "Interests") (the Shares
     and the Interests  being  referred to herein  collectively  as the "Pledged
     Securities"), (C) the certificates and instruments representing the Pledged
     Securities  and (D)  subject to Section 2.5 hereof,  all  dividends,  cash,
     securities  (including,   without  limitation,  any  securities  issued  in
     connection  with stock  dividends or stock splits),  instruments  and other
     Property  from time to time  paid,  payable  or  otherwise  distributed  in
     respect of or in exchange for any or all of the Pledged Securities;

          (ii) all substitutions for and all replacements, products and proceeds
     of the Property described in clause 2.1 (b)(i) above; and

          (iii)  all  books  and  records  pertaining  to any  of  the  Property
     described in clauses 2.1 (b)(i) and (ii) above.

     (c) All of the Property  described in these Sections 2.1(a) and (b) and all
other Property which shall, from time to time, secure the Obligations are herein
collectively referred to as the "Collateral."

     2.2  Representations  and  Warranties.  The  Company and Parent each hereby
represents and warrants that:

     (a) Except for the Pledged Securities owned by Parent, all other Collateral
is owned by the  Company  or  Parent.  Parent is the sole  owner of the  Pledged
Securities.

                                        7

<PAGE>



         No other Person has any right, title, interest, claim, or Lien therein,
         thereon,  or thereto to the  Collateral  other than Liens  permitted to
         exist by the Loan Agreement.

     (b) It has  executed  and will file and will  execute and cause to be filed
Uniform  Commercial Code financing  statements hereof in the appropriate  public
offices of the states where the Collateral is presently  located,  such that the
Lender,  upon  such  filings,  will have a  perfected  first  priority  Security
Interest in such of the  Collateral  as to which  perfection is obtained by such
uniform commercial code filings.

     (c) the Shares  constitute  one  hundred  percent  (100%) of the issued and
outstanding  shares of capital  stock of  CellularVision  Capital,  Inc. and the
Interests  constitute one hundred  percent (100%) of the issued and  outstanding
limited  partnership  interests in the Company,  and there exist no  outstanding
options,  warrants,  convertible  securities  or  other  rights,  contingent  or
absolute, to acquire such capital stock or limited partnership interests.

     (d) It has not, during the preceding five (5) years,  been known by or used
any other corporate, fictitious or trade names. It has not, during the preceding
five (5) years,  been the surviving  corporation of a merger or consolidation or
acquired all or substantially all of the assets of any Person.

     (e) The chief executive  office of the Company and Parent is located at 140
58th Street, Lot 7E, Brooklyn, New York 11220.

     (f) The tangible Collateral of the Company and Parent is now located at the
locations set forth in Exhibit B hereto.

     2.3 Covenants. The Company and Parent each hereby covenants as follows:

     (a) It shall  keep the  Collateral  free of all Liens and the claims of all
Persons, except Liens permitted to exist on the Property by the Loan Agreement.

                                        8

<PAGE>



     (b) It shall  pay and  discharge  when due all  taxes,  levies,  and  other
charges  upon the  Collateral  and upon the  goods  evidenced  by any  documents
constituting  Collateral  and shall  indemnify and defend the Lender against and
save it harmless from all liabilities  arising from such taxes, levies and other
charges.  This  indemnity  shall include  reasonable  attorneys'  fees and legal
expenses.

     (c) Except as  allowed or  permitted  by the Loan  Agreement,  it shall not
sell, lease, transfer or otherwise dispose of any Collateral, and shall not move
any tangible  Collateral  from its  location  other than the sale and removal of
inventory in the ordinary course of business, without the written consent of the
Lender.

     (d) It shall give the Lender  written  notice (and, in any event,  no later
than  thirty  (30) days after the date  thereof)  of (i) any change in its name,
chief  executive  office or the office where it maintains  its books and records
pertaining to Accounts and (ii) the movement or location of any Collateral to or
at, as the case may be, a location other than as set forth in Exhibit B hereto.

     2.4 Further Assurances.  The Company and Parent will, from time to time and
at its own expense, promptly execute, acknowledge,  witness and deliver and file
and record, as appropriate,  such specific and further assignments of all or any
portion of the Collateral  and such other  documents or  instruments,  and shall
take or cause to be taken such other action as the Lender may reasonably request
for the perfection  against it and all other Persons  whomsoever of the Security
Interest,  or for the continuation and protection thereof,  and promptly furnish
to the  Lender  evidence  satisfactory  to the  Lender of such  action.  Without
limiting the generality of the foregoing,  the Company and Parent shall execute,
acknowledge,  witness and/or deliver such financing and continuation statements,
instruments,  documents,  notices and additional security agreements,  make such
notations  on its records and take such other  action as may be requested by the
Lender.  Unless prohibited by law, the Company and parent each hereby authorizes
the  Lender to execute  and file or record,  if  necessary,  any such  financing
statement,  instrument,  document,  notice  and  agreement  on  its  behalf,  as

                                        9

<PAGE>


applicable. The parties agree that a carbon,  photographic or other reproduction
of this Agreement shall be sufficient as a financing statement.

     2.5 Voting Rights, Dividends, etc. with respect to Pledged Securities.

     (a) So long as no Event of Default shall have  occurred and be  continuing,
Parent  shall be entitled to  exercise  any and all voting and other  consensual
rights pertaining to the Pledged  Securities or any part thereof for any purpose
not prohibited by the terms of this Agreement,  including,  without  limitation,
the right to have the Pledged  Securities  registered in the name of Parent,  to
the extent the Pledged Securities may be so registered.

     (b)  Parent  hereby  delivers  the  certificates   evidencing  the  Pledged
Securities to the Lender.  Upon the occurrence and during the  continuance of an
Event of Default,  at the option of the Lender, all rights of Parent to exercise
the voting and other  consensual  rights that it would  otherwise be entitled to
exercise  pursuant to Section  2.5(a)  hereof shall  cease,  and all such rights
shall thereupon  become vested in the Lender,  who shall thereupon have the sole
right to exercise such voting and other consensual rights.

     (c) So long as no Event of Default shall have  occurred and be  continuing,
subject to Section  2.5(f)  hereof and except as  otherwise  provided in Section
2.5(d)  hereof,  Parent  shall be entitled to receive and retain any  dividends,
cash, securities, instruments and other Property from time to time paid, payable
or otherwise distributed in respect to the Pledged Securities.

     (d) Upon the occurrence and during the  continuance of an Event of Default,
all rights of Parent to receive  dividends,  cash,  securities,  instruments and
other  Property  that it would  otherwise  be  authorized  to receive and retain
pursuant to Section 2.5(c) hereof shall cease and all rights to dividends, cash,
securities,  instruments  and other  Property  shall  thereupon be vested in the
Lender,  who  shall  thereupon  have  the  sole  right  to  receive  and hold as
Collateral such dividends, cash, securities, instruments and other Property. All

                                       10

<PAGE>



dividends, cash, securities, instruments and other Property that are received by
Parent in  contravention  of the  provisions  of this  Section  2.5(d)  shall be
received in trust for the benefit of the Lender,  shall be segregated from other
Property or funds of Parent and shall be forthwith  delivered to the Lender,  as
Collateral in the same form as so received (with any necessary  endorsement  and
documents of transfer).

     (e) Parent hereby irrevocably  appoints the Lender, upon the occurrence and
during the continuance of an Event of Default,  as its proxy holder with respect
to the Pledged Securities with full power and authority, pursuant to the written
instructions  of the Lender,  to vote the Pledged  Securities  and otherwise act
with  respect  to the  Pledged  Securities  on behalf of  Parent.  This proxy is
coupled  with an  interest  and shall be  irrevocable  for so long as any of the
Obligations remain in existence.

     (f) Parent agrees that it will cause the issuers of the Pledged  Securities
not to issue any  capital  stock or limited  partnership  interests  or options,
warrants,  convertible  securities or other rights,  contingent or absolute,  to
acquire any capital  stock,  whether in addition to, by stock  dividend or other
distribution upon, or in substitution for, the Pledged Securities, or otherwise,
unless such stock,  instruments  or securities  are forthwith  pledged as herein
provided.

     2.6 Insurance.  All insurers under all Insurance  Policies will be directed
to pay all proceeds payable thereunder in respect of the Collateral  directly to
the Lender to be held as  Collateral.  The Company  and Parent each  irrevocably
makes,  constitutes  and appoints the Lender (and all Persons  designated by the
Lender) as its true and lawful  attorney and  agent-in-fact  for the purposes of
making,  settling  and  adjusting  all  claims  under  all  Insurance  Policies,
endorsing its name on any check, draft,  instrument or other item of payment for
the proceeds of the  Insurance  Policies and for making all  determinations  and
decisions with respect  thereto to the extent the Insurance  Policies  relate to
the Collateral,  in each case, as directed pursuant to the written  instructions
of the  Lender.  In the  event  that at any time or times  hereafter  any of the
Insurance  Policies required above is not obtained or maintained,  or any Person
fails to perform any  obligation or pay any premium in whole or in part relating


                                       11

<PAGE>


thereto,  then the Lender may obtain and maintain such Insurance  Policies,  pay
such  premiums  and take any other  action  with  respect  thereto as the Lender
determines  in its  sole  discretion.  All  sums  so  disbursed  by the  Lender,
including, without limitation,  attorneys' fees, court costs, expenses and other
charges relating thereto, shall be additional Obligations hereunder,  payable on
demand and secured by the Collateral.

     2.7  Protection of Collateral;  Reimbursement.  All expenses of protecting,
storing,  warehousing,   insuring,  handling,   maintaining,  and  shipping  the
Collateral,  and any and all excise,  property,  sales, and use taxes imposed by
any state, federal, or local authority on any of the Collateral or in respect of
the  sale  thereof  shall  be  borne  and paid by the  Company  and  Parent,  as
applicable.  If the Company or Parent, as applicable,  fails to pay promptly any
portion  thereof when due, the Lender may pay the same. All sums so disbursed by
the  Lender,  including,  without  limitation,  attorneys'  fees,  court  costs,
expenses and other charges  relating  thereto,  shall be additional  Obligations
hereunder, payable on demand and secured by the Collateral. The Lender shall not
be liable or responsible in any way for the safekeeping of any of the Collateral
or for any loss or damage thereto or for any diminution in the value thereof, or
for any act or default of any warehouseman, carrier, forwarding agency, or other
Person  whomsoever,  but the same shall be at the  Company's  and Parent's  sole
risk.

3.   EVENTS OF DEFAULT; RIGHTS AND REMEDIES ON DEFAULT.

     3.1 Events of Default.  An "Event of Default"  under this  Agreement  shall
exist if at any time an Event of  Default  (as  defined  in the Loan  Agreement)
shall exist.

     3.2 Remedies.  The Lender shall have the following rights and remedies upon
the occurrence of an Event of Default:

     (a) all of the rights and  remedies  of a secured  party  under the Uniform
Commercial  Code as in effect in the State of New York,  and all other legal and
equitable  rights to which the Lender may be entitled under this  Agreement,  or
under other applicable law, including the right to have a receiver appointed for


                                       12

<PAGE>


all of the  property of the Company or Parent,  all of which rights and remedies
shall be cumulative, and none of which shall be exclusive;

     (b) the  right to take  immediate  possession  of the  Collateral,  and (i)
require  the  Company to  assemble  each item of  Collateral,  at the  Company's
expense,  and make it available to the Lender at a place to be designated by the
Lender which is reasonably convenient to both parties, and (ii) enter any of the
premises  wherever the  Collateral  shall be located,  with or without  force or
process of law, and to keep and store the same on said premises  until sold (and
if said  premises be the property of a Person  executing  this  Agreement,  such
Person  agrees not to charge the Lender for  storage  thereof for a period of at
least ninety (90) days after sale or disposition of said Collateral);

     (c) the right to sell or otherwise to dispose of all or any  Collateral  in
its then condition, or after any further manufacturing or processing thereof, at
public or private sale or sales,  with such notice as may be required by law, in
lots or in bulk, for cash or on credit  (without any assumption of credit risk),
or any  combination  thereof,  and at such  locations  as may be  stated in such
notice,  all as the Lender,  in its sole  discretion,  may deem  advisable  (the
Company and Parent each hereby agreeing that ten (10) days' prior written notice
to any of them of any public or private sale or other  disposition of Collateral
shall be reasonable notice thereof);

     (d) the right to  conduct  any such  sales on the  premises  of any  Person
executing this  Agreement,  without charge  therefor,  and to adjourn such sales
from time to time in accordance with applicable law;

     (e) a license or other right to use, without charge,  the labels,  patents,
copyrights,  rights of use of any name, trade secrets,  trade names,  trademarks
and advertising  matter,  or any property of a similar nature, as it pertains to
the  Collateral,  in advertising  for sale and selling any  Collateral,  and the
rights under all licenses and all franchise agreements; and


                                       13

<PAGE>



     (f)  the  right  to  proceed  by a suit or  suits  at law or in  equity  to
foreclose the security  interest  granted  under this  Agreement and to sell the
Collateral,  or any portion thereof, pursuant to a judgment or decree of a court
or courts of competent jurisdiction.

     3.3 Pledged Securities.

     (a) Parent  agrees  that the Lender  shall not be  required  to register or
qualify  any of the Pledged  Securities  under any  applicable  state or federal
securities  laws in connection with any sale thereof if such sale is effected in
a manner that complies with all applicable federal and state securities laws. In
effecting  any  such  sale,  the  Lender  shall  be  authorized  (if it deems it
advisable to do so) to restrict the  prospective  bidders or purchasers to three
(3) Persons,  who will  represent and agree that they are purchasing the Pledged
Securities  for  their own  account  for  investment  and not with a view to the
distribution or sale thereof.  In the event that any such Pledged Securities are
sold at private sale after the Lender has sought bids by the method  approved in
the preceding sentence, so long as one of such bids was accepted,  Parent agrees
that

          (i) the sale  shall be deemed  to be  commercially  reasonable  in all
     respects,

          (ii) Parent shall not be entitled to a credit against the  Obligations
     in an amount in excess of the purchase price, and

          (iii) the Lender shall not incur any  liability or  responsibility  to
     Parent in connection  therewith,  notwithstanding  the  possibility  that a
     substantially higher price might have been realized at a public sale.

     (b) Parent  recognizes  that a ready  market may not exist for the  Pledged
Securities if it is not regularly  traded on a recognized  securities  exchange,
and that a sale by the  Lender of any of the  Pledged  Securities  for an amount
substantially  less  than a pro  rata  share  of the  Fair  Market  Value of the
issuer's   assets  minus  the   amount  of  such  issuer's  liabilities  may  be

                                       14

<PAGE>



commercially  reasonable  in view of  difficulties  that may be  encountered  in
attempting to sell Pledged Securities that is privately traded.

     (c) Upon the  occurrence of an Event of Default and the sale of the Pledged
Securities,  the  Company  and Parent  will fully  cooperate  with the Lender to
comply with the rules and  regulations of the FCC and other  requirements of law
to effectuate  such sale,  including the giving of requisite  notices to the FCC
and the solicitation of consents therefrom.

     3.4 Purchase by the Lender. In the event that the Lender shall purchase all
or any portion of the Collateral at any such sale, the Lender may elect to apply
a portion of the Obligations owing to it in satisfaction of part of the purchase
price of all or such portion of the  Collateral so  purchased.  Such part of the
purchase  price  shall be equal to the amount that would be  distributed  to the
Lender  pursuant to Section  3.5 as a result of such  purchase if the Lender had
paid such purchase price entirely in cash.

     3.5 Application of Proceeds.  All proceeds  realized by the Lender from any
sale or other  realization on the Collateral shall be applied to the Obligations
as follows:

          First, to the payment of reasonable  costs and expenses of foreclosure
     or suit, if any, and of such sale or other  exercise of rights,  and of all
     proper  expenses,  liabilities  and advances,  including legal expenses and
     attorneys'  fees  (including,  without  limitation,  the allocated costs of
     staff counsel of the Lender),  incurred or made hereunder by the Lender, or
     any other  amounts  then due but  unpaid to the  Lender  and of all  taxes,
     assessments or liens superior to the Security  Interest,  except any taxes,
     assessments  or  superior  liens  subject  to  which  said  sale  or  other
     disposition may have been made;

          Second, to the payment of unpaid principal of the Obligations;

          Third,  to the  payment of unpaid  interest  on the  principal  of the
     Obligations;


                                       15

<PAGE>



          Fourth,  to the payment of unpaid fees with respect to the Obligations
     and all  other  amounts  owing  under  the Loan  Agreement  to the  Persons
     entitled to payment thereunder; and

          Fifth, to the payment of the surplus, if any, arising from an exercise
     of rights with  respect to the  Collateral,  to the  Company or Parent,  as
     applicable,  their successors and assigns, or to whomsoever may be lawfully
     entitled to receive the same.

The  Company  and  Parent  shall  remain  liable  hereunder  for  payment of any
deficiency on the Obligations after application of such proceeds.

     3.6 Remedies Cumulative. All covenants, conditions, provisions, warranties,
guaranties,  indemnities and other undertakings contained in this Agreement,  or
in any document  referred to herein or contained in any agreement  supplementary
hereto,  shall be deemed  cumulative to and not in derogation or substitution of
any of the terms,  covenants,  conditions or agreements  herein  contained.  The
failure or delay of the Lender to  exercise  or enforce  any  rights,  powers or
remedies  hereunder or under any of the aforesaid  agreements or other documents
shall not operate as a waiver of such rights, powers and remedies,  but all such
rights, powers and remedies shall continue in full force and effect until all of
the  Obligations  shall have been fully  satisfied,  and all rights,  powers and
remedies herein provided for are cumulative and none is exclusive.  No single or
partial  exercise  by the  Lender  of any  right,  power or  remedy  under  this
Agreement shall preclude the exercise of any other right, power or remedy.

     4. APPOINTMENT OF LENDER AS LAWFUL ATTORNEY.

     Upon the occurrence and during the continuance of an Event of Default,  the
Company and Parent each irrevocably designates,  makes, constitutes and appoints
the Lender (and all Persons  designated by Lender) as their  respective true and
lawful  attorney (and  agent-in-fact);  and the Lender,  or the Lender's  agent,
without  notice to any of them,  and at such time or times as the Lender or said
agent, in its sole  discretion,  may determine in its or the Bank's name, at its
option,  may (i) demand  payment of the  Accounts;  (ii) enforce  payment of the


                                       16

<PAGE>


Accounts,  by legal  proceedings or otherwise;  (iii) exercise all of its rights
and  remedies  with  respect to the  collection  of the  Accounts  and any other
Collateral;  (iv) settle, adjust, compromise,  extend or renew the Accounts; (v)
settle,  adjust or  compromise  any legal  proceedings  brought to  collect  the
Accounts;  (vi) if permitted by applicable  law, sell or assign the Accounts and
other  Collateral upon such terms, for such amounts and at such time or times as
the Lender deems  advisable;  (vii)  discharge  and release the Accounts and any
other Collateral;  (viii) take control, in any manner, of any item of payment or
proceeds relating to any Collateral;  (ix) prepare,  file and sign its name on a
proof of claim in bankruptcy or similar document against any account debtor; (x)
prepare,  file  and  sign  its  name  on  any  notice  of  lien,  assignment  or
satisfaction of lien or similar  document in connection with the Accounts;  (xi)
do all acts and things necessary, in the Bank's sole discretion,  to fulfill its
obligations  under this Agreement;  (xii) endorse its name upon any of the items
of payment or proceeds  relating to any  Collateral  and deposit the same to the
account of the Lender on account of the  Obligations;  (xiii)  endorse  its name
upon any chattel paper,  document,  instrument,  invoice,  freight bill, bill of
lading or similar document or agreement  relating to the Accounts,  Inventory or
any  other   Collateral;   (xiv)  use  its  stationery  and  sign  its  name  to
verifications of the Accounts and notices thereof to account  debtors;  (xv) use
the information  recorded on or contained in any data  processing  equipment and
computer hardware and software relating to the Accounts, Inventory and any other
Collateral to which it has access;  and (xvi) exercise any and all of its rights
under  each  contract  to  which it is a party  or  under  which  it has  rights
(including  the right to enter into  possession  of and use any and all Property
leased or licensed it, as lessee or licensee, the right to use any or all of the
facilities  made  available  to it  and  the  right  to  make  all  waivers  and
agreements,  to give all notices, consents and releases, to take all action upon
the happening of any default  giving rise to a right in favor of it under any of
such contracts, and to do any and all other things whatsoever which it is or may
become entitled to do under any of such contracts).

     5. MISCELLANEOUS.

     5.1 Modification of Agreement. This Agreement may not be modified,  altered
or amended,  and no provision  may be waived,  except by an agreement in writing
signed by the party against whom enforcement would be sought.

                                       17

<PAGE>



     5.2 Expenses and Indemnity.  Each Person, except the Lender, executing this
Agreement  will  upon  demand  pay to the  Lender  the  amount  of any  and  all
reasonable  expenses,  including the fees and expenses of its counsel and of any
experts and agents, which it may incur in connection with

     (a) the preparation, execution, or administration of this Agreement, or any
amendments, or proposed amendments, hereto,

     (b) the custody or  preservation  of, or the sale of,  collection  from, or
other realization upon, any of the Collateral,

     (c) the exercise or  enforcement  of any of its rights or  responsibilities
hereunder, or

     (d) the failure by each Person, except the Lender, executing this Agreement
to perform or observe any of the provisions hereof.

     In  addition,  each Person,  except the Lender,  executing  this  Agreement
agrees to indemnify,  and hold harmless, the Lender, on demand, from and against
any and all  liabilities,  obligations,  losses,  damages,  penalties,  actions,
judgments,  suits,  reasonable  costs  (including  the allocated  costs to it of
in-house  legal  services) and fees,  expenses or  disbursements  of any kind or
nature  whatsoever  which may be imposed on, incurred by, or asserted against it
in any way  relating to or arising out of this  Agreement or any action taken or
omitted by it under this Agreement, provided that no such Person shall be liable
for any portion of such liabilities,  obligations,  losses, damages,  penalties,
actions, judgments, suits, costs, fees, expenses or disbursements resulting from
the Lender's gross negligence, willful misconduct or bad faith.

     Any amounts  payable  under this Section  5.2,  and any other  amounts that
become  Obligations  pursuant to any  provision  of this  Agreement,  shall bear
interest  from the date such amounts  shall be paid by the Lender at the Default
Rate provided in the Loan Agreement on demand,  and shall constitute  additional
Obligations secured by the Collateral.

                                       18

<PAGE>



     5.3 Waiver and Estoppel.

     (a) The Company and Parent each  agrees,  to the extent it may  lawfully do
so,  that it will not at any  time in any  manner  whatsoever  claim or take the
benefit  or  advantage  of,  any  appraisement,   valuation,   stay,  extension,
moratorium,  turnover or redemption  law, or any law permitting it to direct the
order in which the  Collateral  shall be sold,  now or at any time  hereafter in
force,  which  may  delay,  prevent  or  otherwise  affect  the  performance  or
enforcement of this Agreement, and hereby waives all benefit or advantage of all
such laws.

     (b) The  Company  and Parent  each to the extent it may  lawfully do so, on
behalf of itself and all who may claim  through or under it,  including  without
limitation any and all  subsequent  creditors,  vendees,  assignees and lienors,
waives  and  releases  all  rights to demand or to have any  marshalling  of the
Collateral upon any sale, whether made under any power of sale granted herein or
pursuant to judicial  proceedings or upon any  foreclosure or any enforcement of
this  Agreement  and  any  documents  or  instruments   executed  in  connection
therewith.

     (c) The Company and Parent each  waives,  to the extent it may  lawfully do
so, presentment, demand, protest and any notice of any kind or nature including,
without limitation,  notice of default,  notice of any assertion of any right by
the  Lender or notice of  action or  inaction  on the part of the  Lender or any
other Person (except notices explicitly  required  hereunder) in connection with
this Agreement or the Collateral.

     (d) The Company and Parent each  waives,  to the extent it may  lawfully do
so, any right to require the Lender to proceed  against  any Person,  to exhaust
any other  collateral or security  interests or guaranties,  to pursue any other
remedy,  or to pursue any of such rights in any particular order or manner,  and
waives any defenses  arising by reason of any disability or other defense of any
other Person.  The Lender may act against the Company or Parent to enforce their
respective obligations and liabilities  hereunder,  whether or not any action is
brought  against  the others or any other  Person  and  whether or not any other
Person is joined in any such action or actions.

                                       19

<PAGE>



     5.4  Termination.  This Agreement  shall terminate when all the Obligations
have been fully and indefeasibly  paid and performed,  provided that each of the
Company  and  Parent  shall be solvent  immediately  after  satisfaction  of the
Obligations.  If any of them  shall not be  solvent,  this  Agreement  shall not
terminate  and the Lender  shall take no action  under this Section 5.4 until 91
days after the satisfaction of the Obligations.

Upon such  termination,  the Lender shall reassign and redeliver (or cause to be
reassigned and redelivered) to the Company and Parent, as applicable, or to such
Person or Persons as the Company and Parent,  as applicable,  shall designate or
to whomever  may be lawfully  entitled  thereto,  against  receipt,  such of the
Collateral  (if any) as shall  not have been sold or  otherwise  applied  by the
Lender  pursuant to the terms  hereof and shall  still be held by it  hereunder,
together with  appropriate  instruments of  reassignment  and release.  Any such
reassignment shall be without recourse upon or warranty by the Lender and at the
expense of the Company and Parent, as applicable.

     5.5  Governing  Law. THIS  AGREEMENT  SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH NEW YORK LAW.

     5.6 Severability. Wherever possible, each provision of this Agreement shall
be  interpreted  in such manner as to be  effective.  If any  provisions of this
Agreement or any Lien or other right of the Lender hereunder shall be held to be
invalid,  illegal  or  unenforceable  under  applicable  law,  such  invalidity,
illegality or  unenforceability  shall not affect any other provision  herein or
any Lien or other right granted hereby.

     5.7 Section  Headings.  The section  headings  contained in this  Agreement
appear  as a  matter  of  convenience  only,  do not  constitute  a part of this
Agreement and shall not affect the construction hereof.

     5.8 Restoration of Rights and Remedies. If the Lender shall have instituted
any  proceeding  to enforce any right or remedy  under this  Agreement  and such
proceeding  shall have been  discontinued or abandoned for any reason,  or shall


                                       20

<PAGE>


have been  determined  adversely to the Lender,  then and in every such case the
Lender, as the case may be, and the Company and Parent,  shall, except as may be
limited  or  affected  by any  determination  in such  proceeding,  be  restored
severally and respectively to their respective former positions  hereunder,  and
thereafter all rights and remedies of the Lender, and the rights and remedies of
the Company and Parent,  shall  continue as though no such  proceeding  had been
instituted.

     5.9 Duplicate  Originals;  Execution in Counterpart.  Two or more duplicate
originals of this Agreement may be signed by the parties, each of which shall be
an  original  but all of  which  together  shall  constitute  one  and the  same
instrument. This Agreement may be executed in one or more counterparts and shall
be  effective  when at least one  counterpart  shall have been  executed by each
party hereto, and each set of counterparts which,  collectively,  show execution
by each party hereto shall constitute one duplicate original.

     5.10  Notice.  Except as otherwise  provided  herein,  any notice  required
hereunder shall be in writing,  and shall be deemed to have been validly served,
given or  delivered  either  when  actually  received by the  addressee  or upon
deposit in the United States mail, first class, with proper postage prepaid, and
addressed to the party to be notified as follows:

     (a) if to the Company and Parent, at:

                           140 58th Street
                           Lot 7E
                           Brooklyn, New York 11220

     With a copy of any notice relating to an Event of Default to:

                           Willkie Farr & Gallagher
                           787 Seventh Avenue
                           New York, New York 10019-6099
                           Attention: Bruce R. Kraus, Esq.

                  (b)      if to Lender, at:

                           WinStar Communications, Inc.
                           230 Park Avenue -- Suite 3126
                           New York, New York 10169
                           Attention:        Timothy R. Graham


                                       21

<PAGE>



     With a copy of any notice relating to an Event of Default to:

                            Graubard Mollen & Miller
                            600 Third Avenue
                            New York, New York 10016
                            Attention: David Alan Miller

or to such other  address as each party may  designate  by like notice  given in
accordance  with this  Section  5.10.  Failure  to provide a copy of a notice to
Willkie Farr & Gallagher will not otherwise affect the validity or effectiveness
of such notice.

     5.11  Waiver of Trial by Jury;  Set-off or  Counterclaim.  The  Company and
Parent  each waives  trial by jury,  and the right to  interpose  any set-off or
counterclaim  of any nature or  description  in any litigation in any court with
respect  to, in  connection  with,  or arising  out of,  this  Agreement  or any
instrument   or   document   delivered   pursuant   hereto   or  the   validity,
interpretation, collection or enforcement hereof.

     5.12 Certain Refundings. The provisions of this Agreement shall continue to
apply to amounts  outstanding  under the Loan Agreement  following any repayment
and reborrowing of the Loans contemplated by the Loan Agreement.

     5.13 Certain  Bankruptcy  Matters.  The  obligations  of the parties hereto
shall not be affected by the  bankruptcy  or insolvency of the Company or Parent
or by the invalidity,  disallowance or  subordination  of any of the Obligations
under Section 548 of the Federal  Bankruptcy Code, under the Uniform  Fraudulent
Conveyance Act as in effect in any state or under any similar statute or rule of
law  (whether  asserted by a creditor,  a trustee in  bankruptcy  or a debtor in
possession).


                                       22

<PAGE>



     IN WITNESS WHEREOF, this Agreement has been duly executed as of the day and
year specified at the beginning hereof.

                            CELLULARVISION OF NEW YORK, L.P.
                            By:      CELLULARVISION CAPITAL CORP.,
                                      General Partner


                            By:_______________________________________________
                            Name:    Shant Hovnanian
                            Title:   Chairman & Chief Executive Officer


                            CELLULARVISION USA, INC.


                            By:_______________________________________________
                            Name:    Shant Hovnanian
                            Title:   Chairman & Chief Executive Officer


                            WINSTAR COMMUNICATIONS, INC.


                            By:_______________________________________________
                            Name:    Timothy R. Graham
                            Title:   Executive Vice President





                                       23

<PAGE>


WinStar To Acquire  850 MHz of  Bandwidth  in New York City From  CellularVision
USA;  Purchase  Will  Increase  WinStar's  Spectrum  Holdings  in  Largest  U.S.
Telecommunications Market to 1,750 MHz

NEW YORK--(BUSINESS WIRE)--July 13, 1998--WinStar Communications, Inc. (NASDAQ -
WCII) today announced it has agreed to purchase 850 MHz of bandwidth in New York
City from  CellularVision  USA,  Inc.  (NASDAQ - CVUS).  The  bandwidth is being
disaggregated from CellularVision's LMDS license for the New York area, and will
be  combined  with  WinStar's  existing  38 GHz  licenses  to  establish a total
spectrum position of 1,750 MHz.

"Through  this  transaction,  WinStar will have an  unprecedented  capability to
bring 21st century  communications  services to the most important  business and
financial market in the world," said William J. Rouhana, Jr., WinStar's Chairman
and Chief Executive  Officer.  "This is the largest amount of spectrum ever held
in a single  city,  and we expect it will  enable us to provide a  comprehensive
range of  high-speed  voice,  video and data  services.  Additionally,  when the
company's  point-to-multipoint  network architecture is deployed in New York, it
will leverage these spectrum assets and enable WinStar to bring  fiber-equipment
broadband  services to thousands of office buildings and multiple dwelling units
which  have  not  been   directly   connected   to  the   emerging   information
superhighway," added Rouhana. The purchase further solidifies WinStar's industry
leadership at a national level,  raising the company's  average bandwidth in the
top 50 U.S.
markets above 750 MHz.

WinStar's  enhanced  bandwidth  holdings in New York will cover a population  of
more than 8 million and total  approximately  145 million  channel pops (covered
population times the number of 100 MHz equivalent channels).  WinStar has agreed
to pay  CellularVision  $32.5 million in cash for the additional  spectrum.  The
transaction  is  expected  to close in the  fourth  quarter  of 1998,  after FCC
approval  has been  obtained.  Additionally,  WinStar  has  agreed  to lend $3.5
million to  CellularVision  as soon as lenders'  consents are  obtained,  and an
additional  $2.0 million upon the receipt of the approval of the  transaction by
CellularVision's  stockholders  and the completion of required FCC filings.  The
acquired  spectrum  will not be used to support any of the  ongoing  services or
operations of CellularVision.

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 (SM) services  using its licenses in the 28 and 38 GHz spectrum.
The  company  also  provides  long  distance,  Internet,  data  and  information
services.

WinStar is a  registered  trademark,  and  Wireless  Fiber is a service  mark of
WinStar Communications, Inc.

CONTACT:


<PAGE>


Financial Community                         Press

Frank Jepson                                Beth-Ellen Keyes

SVP Capital Markets                         (212) 584-4098

(212) 584-4021

KEYWORD:  NEW YORK





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