EXHIBIT 4



                                                                  EXECUTION COPY


                                STOCK OPTION AGREEMENT

    STOCK OPTION AGREEMENT, dated as of November 20, 1997 (this "Agreement"),
among INTERMEDIA COMMUNICATIONS INC., a Delaware corporation ("PURCHASER"), and
the individuals and entities whose names and addresses are set forth at the foot
of this Agreement (collectively, the "STOCKHOLDERS", and each, individually, a
"STOCKHOLDER"), it being understood that the Stockholders are executing this
Agreement in their capacity as stockholders of the Company (as defined below)
and not in their capacity as directors or officers of the Company.

    WHEREAS, Purchaser and its wholly owned subsidiary, Moonlight Acquisition
Corp. (the "SUBSIDIARY"), propose to enter into an Agreement and Plan of Merger,
dated as of the date hereof (the "MERGER AGREEMENT"), with Shared Technologies
Fairchild, Inc., a Delaware corporation (the "COMPANY"), which Merger Agreement
provides, among other things, for the acquisition of the Company by Subsidiary
through a merger pursuant to which Subsidiary will merge with and into the
Company (the "MERGER") and all outstanding shares of Common Stock of the
Company, par value $.01 per share ("COMPANY COMMON STOCK") other than shares
held by Purchaser and Subsidiary will be converted into the right to receive
$15.00 per share (the "PER SHARE AMOUNT") and each outstanding share of
Preferred Stock of the Company, par value, $.01 per share ("COMPANY PREFERRED
STOCK") which is convertible into Common Stock and is not owned by Purchaser
will be converted into the right to receive the Per Share Amount multiplied by
the number of shares of Company Common Stock into which such share of Company
Preferred Stock is convertible which would have been received had such share of
Preferred Stock been converted immediately prior to the Merger (the "PREFERRED
STOCK PER SHARE AMOUNT"), in each case, net to the holder thereof in cash; and

    WHEREAS, as of the date hereof, the Stockholders own (both beneficially and
of record) the number of shares of Company Common Stock, options to purchase
Company Common Stock ("Options") and Company Preferred Stock set forth opposite
their respective names at the foot of this Agreement; and

    WHEREAS, as a condition to the willingness of Purchaser and the Subsidiary
to enter into the Merger Agreement, Purchaser and the Subsidiary have required
that the Stockholders agree, and in order to induce Purchaser and the Subsidiary



                                         -2-

to enter into the Merger Agreement, the Stockholders have agreed, to enter into
this Agreement governing the voting and disposition of the shares of Company
Common Stock, Company Common Stock issuable upon exercise of Options and Company
Preferred Stock now owned and which may hereafter be acquired by any of the
Stockholders (the "SHARES").

    NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements contained herein, and intending to be legally bound hereby, the
parties hereto hereby agree as follows:

I.  GRANT OF OPTION.  Each Stockholder hereby grants to Purchaser an exclusive
    and irrevocable option (each an "OPTION", and together the "OPTIONS") to
    purchase from such Stockholder any and all Shares held by such Stockholder
    (the "OPTION SHARES") at a price equal to the Per Share Amount, net to the
    Seller in cash, for each Share which is a share of Company Common Stock and
    a price equal to the Preferred Stock Per Share Amount, net to the Seller in
    cash, for each Share which is a share of Company Preferred Stock. 
    Purchaser may assign to any subsidiary or affiliate of Purchaser (including
    Subsidiary) the right to exercise the Options.  Each Option may be
    exercised individually from each Stockholder, in whole or in part, at any
    time or from time to time, on or after the date hereof and prior to the
    Termination Date (as defined below).  No Stockholder shall, prior to the
    termination of the Option, take, or refrain from taking, any action which
    would have the effect of preventing or disabling such Stockholder from
    delivering the Option Shares or otherwise performing its obligations under
    this Agreement.  In the event Purchaser wishes to exercise any Option, in
    whole or in part, the following procedures shall be followed:

    (a)  Purchaser shall send a written notice to such Stockholder specifying
         the number and kind of Option Shares Purchaser will purchase and the
         place and date on or before the later of (x) ten business days from
         the date such notice is mailed, (y) two days after the date of
         expiration or termination of any applicable waiting period under Title
         II of the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the
         "HSR ACT") and (z) two days after the receipt of any necessary
         approvals from the Federal Communications Commission (the "FCC") or
         any applicable State regulatory authority for the closing of such
         purchase.  If 



                                         -3-

         such closing is to occur sooner than ten business days from the date
         such notice is mailed, notice shall also be given at the time such
         written notice is given by telephone or telecopy.  To the extent such
         notice provides for the purchase of Option Shares issuable upon
         exercise of Options, the Stockholder hereby agrees to exercise the
         option relating to such Option Shares sufficiently prior to such
         closing to permit certificates for such Option Shares to be delivered
         at such closing.

    (b)  At the closing of such purchase, (i) Purchaser (or any affiliate or
         subsidiary of Purchaser) shall pay to such Stockholder the aggregate
         price for the Option Shares so purchased by certified or cashier's
         check or wire transfer of immediately available funds and (ii) such
         Stockholder shall deliver to Purchaser (or, at the option of
         Purchaser, an affiliate or subsidiary of Purchaser) a certificate or
         certificates, duly endorsed in blank or accompanied by stock powers
         duly executed in blank, representing the number of Option Shares
         purchased.

    (c)  To the extent any Stockholder has sold any Option Shares to Purchaser
         pursuant to that certain purchase agreement dated the date hereof or
         pursuant to the Lender offer to be made pursuant to the Merger
         Agreement prior to the exercise of the Option, such Option Shares
         shall cease to be Option Shares subject to this Agreement.

    II.  VOTING OF SHARES.  Each Stockholder, until the Termination Date, shall
         cause the Shares owned by such Stockholder to be voted at any meeting
         of the stockholders of the Company or in any consent in lieu of such a
         meeting in favor of the consummation of the transactions contemplated
         by the Merger Agreement, against any transactions inconsistent
         therewith, and as otherwise reasonably requested by Purchaser in order
         to carry out the purposes of the Merger Agreement.  For the purposes
         of this Agreement, "TERMINATION DATE" shall mean the earlier of (i)
         two days after the termination of the Merger Agreement in accordance
         with its terms, (ii) the Effective Time  (as defined in the Merger
         Agreement), and (iii) the termination of this Agreement by the mutual
         written agreement of the parties hereto or pursuant to the terms of
         Section 9 of this Agreement.




                                         -4-

    III. IRREVOCABLE PROXY.  Each Stockholder hereby irrevocably appoints
         Purchaser, until the Termination Date, as its attorney and proxy
         pursuant to the provisions of Section 212 of the General Corporation
         Law of the State of Delaware, with full power of substitution, to vote
         and take other actions (by written consent or otherwise) in favor of
         the consummation of the transactions contemplated by the Merger
         Agreement, against any transactions inconsistent therewith, and as
         otherwise reasonably required in order to carry out the purposes of
         the Merger Agreement, with respect to the Shares (and all other
         securities issued to the Stockholder in respect of the Shares) which
         each Stockholder is entitled to vote at any meeting of stockholders of
         the Company (whether annual or special and whether or not an adjourned
         or postponed meeting) or in respect of any consent in lieu of any such
         meeting or otherwise.  This proxy and power of attorney is irrevocable
         and coupled with an interest in favor of Purchaser.  Each Stockholder
         hereby revokes all other proxies and powers of attorney with respect
         to the Shares (and all other securities issued to the Stockholder in
         respect of the Shares) which it may have heretofore appointed or
         granted, and no subsequent proxy or power of attorney shall be given
         or written consent executed (and if given or executed, shall not be
         effective) by the Stockholder with respect thereto.

    IV.  NO DISPOSITION OR ENCUMBRANCE OF SHARES.  Each Stockholder hereby
         covenants and agrees that, until the expiration of the Options as
         provided in Section 1 of this Agreement, except as contemplated by
         this Agreement, the Stockholder shall not, and shall not offer or
         agree to, sell, transfer, tender, assign, hypothecate or otherwise
         dispose of, or create or permit to exist any security interest, lien,
         claim, pledge, option, right of first refusal, agreement, limitation
         on the Stockholder's voting rights, charge or other encumbrance of any
         nature whatsoever with respect to the Shares, except for the security
         interest arising from that certain Pledge Agreement dated as of March
         13, 1996 between RHI Holdings, Inc. and Gadsby & Hannah (the "Pledge
         Agent") and except for the security interest arising from that certain
         Amended and Restated Pledge Agreement dated as of July 18, 1997
         between RHI Holdings, Inc. and Citicorp USA, Inc. (the "Citicorp
         Pledge Agreement").

    V.   NO SOLICITATION OF TRANSACTIONS.  Each Stockholder shall not, directly
         or indirectly, through any agent or 



                                         -5-

         representative or otherwise, (i) solicit, initiate or encourage the
         submission of any proposal or offer from any individual, corporation,
         partnership, limited partnership, syndicate, person (including,
         without limitation, a "person" as defined in Section 13(d)(3) of the
         Securities Exchange Act of 1934 as amended), trust, association or
         entity or government, political subdivision, agency or instrumentality
         of a government (collectively, other than Purchaser and any affiliate
         of Purchaser, a "PERSON") relating to (a) any acquisition or purchase
         of all or any of the Shares or (b) any acquisition or purchase of all
         or any portion of the assets of, or any equity interest in, the
         Company or any subsidiary of the Company or any business combination
         with the Company or any subsidiary of the Company or (ii) participate
         in any negotiations regarding, or furnish to any Person any
         information with respect to, or otherwise cooperate in any way with,
         or assist or participate or facilitate or encourage, any effort or
         attempt by any Person to do or seek any of the foregoing.  Each
         Stockholder immediately shall cease and cause to be terminated all
         existing discussions or negotiations of the Stockholder and its agents
         or other representatives with any Person conducted heretofore with
         respect to any of the foregoing.  Each Stockholder shall notify
         Purchaser promptly if any such proposal or offer, or any inquiry or
         contact with any Person with respect thereto, is made and shall, in
         any such notice to Purchaser, indicate in reasonable detail the
         identity of the Person making such proposal, offer, inquiry or contact
         and the terms and conditions of such proposal, offer, inquiry or
         contact.  The provisions of this Section 3 shall not apply to or
         restrict any action that may be taken by the Stockholder in its
         capacity as an officer or director of the Company.

    VI.  LEGEND ON CERTIFICATES.  The certificate(s) evidencing the Shares and
         the agreements evidencing the Options shall be endorsed with a
         restrictive legend substantially as follows:

              The shares [options] evidenced by this certificate [agreement]
              are subject to a stock option agreement dated as of November 20,
              1997 between the registered holder hereof and Intermedia
              Communications Inc., a copy of which is on file at the principal
              office of the Company.  The holder of this certificate
              [agreement], by his acceptance hereof, agrees to be 



                                         -6-

              bound by all the terms of such agreement, as the same is in
              effect from time to time.

    VII. REPRESENTATIONS AND WARRANTIES OF THE STOCKHOLDERS.  Each Stockholder
         hereby severally represents and warrants with respect to itself and
         its ownership of the Shares to Purchaser and the Subsidiary as
         follows:

         65535.VII1.    AUTHORITY RELATIVE TO THIS AGREEMENT.  The Stockholder
              has all necessary power and authority to execute and deliver this
              Agreement, to perform its obligations hereunder and to consummate
              the transactions contemplated hereby.  The execution and delivery
              of this Agreement by the Stockholder and the consummation by the
              Stockholder of the transactions contemplated hereby have been
              duly and validly authorized by all necessary action on the part
              of the Stockholder.  This Agreement has been duly and validly
              executed and delivered by the Stockholder and, assuming the due
              authorization, execution and delivery by Purchaser, constitutes a
              legal, valid and binding obligation of the Stockholder,
              enforceable against the Stockholder in accordance with its terms,
              except that such enforceability may be limited by bankruptcy,
              insolvency or similar laws affecting creditors' rights generally.

         65535.VII2.    NO CONFLICT.  The execution and delivery of this
              Agreement by the Stockholder does not, and the performance of
              this Agreement by the Stockholder will not, (i) require any
              consent, approval, authorization or permit of, or filing with or
              notification to (other than pursuant to the HSR Act, the
              Securities Exchange Act of 1934, as amended (the "Exchange Act")
              and the Other Regulatory Approvals), any governmental or
              regulatory authority, domestic or foreign, (ii) conflict with or
              violate the Certificate of Incorporation or By-laws (or
              comparable organizational documents) of the Stockholder, (iii)
              conflict with or violate any law, rule, regulation, order,
              judgment or decree applicable to the Stockholder or by which any
              property or asset of the Stockholder is bound, or (iv) result in
              any breach of or constitute a default (or an event which with
              notice or lapse of time or both would become a default) under, or
              give to others any right of termination, amendment, acceleration
              or cancellation of, or result in the creation of a lien or other
              encumbrance of any nature whatsoever on any 



                                         -7-

              property or asset of the Stockholder pursuant to, any note, bond,
              mortgage, indenture, contract, agreement, lease, license, permit,
              franchise or other instrument or obligation to which the
              Stockholder is a party or by which the Stockholder or any
              property or asset of the Stockholder is bound except that a
              consent pursuant to that certain Shareholders' Agreement dated
              March 13, 1996 by and among Shared Technologies Inc., RHI
              Holdings Inc. and Anthony D. Autorino (the "Shareholders
              Agreement") may be required and have been obtained.

         65535.VII3.    TITLE TO THE SHARES.  The Shares and Options owned by
              the Stockholder (as set forth on the signature pages hereto) are
              all the Shares and Options of the Company owned, either of record
              or beneficially, by the Stockholder.  The Stockholder owns all
              such Shares free and clear of all security interests, liens,
              claims, pledges, options, rights of first refusal, agreements,
              limitations on the Stockholder's voting rights, charges and other
              encumbrances of any nature whatsoever (except for the liens
              granted to the Pledge Agent and pursuant to the Citicorp Pledge
              Agreement), and, except as provided in this Agreement, other than
              the Shareholders Agreement, the Pledge Agreement and the Citicorp
              Pledge Agreement, the Stockholder has not appointed or granted
              any proxy, which appointment or grant is still effective, with
              respect to the Shares.  RHI hereby agrees to obtain a release
              from their limitation on voting rights in the Citicorp Pledge
              Agreement within 10 days after the date of this Agreement.

         65535.VII4.    BROKERS.  No broker, finder or investment banker is
              entitled to any brokerage, finder's or other fee or commission in
              connection with the transactions contemplated hereby based upon
              arrangements made by or on behalf of the Stockholder.

    VIII.     REPRESENTATIONS AND WARRANTIES OF PURCHASER.  Purchaser hereby
              represents and warrants to the Stockholders as follows:

         65535.VIII1.   Purchaser has all necessary power and authority to
              execute and deliver this Agreement, to perform its obligations
              hereunder and to consummate the transactions contemplated hereby. 
              The execution, delivery and performance of this Agreement by 



                                         -8-

              Purchaser and the consummation of the transactions contemplated
              hereby have been duly authorized by all necessary action on the
              part of Purchaser.  This Agreement has been duly and validly
              executed and delivered by Purchaser and, assuming the due
              authorization, execution and delivery by the Stockholders,
              constitutes a legal, valid and binding obligation of Purchaser,
              enforceable against the Purchaser in accordance with its terms,
              except that such enforceability may be limited by bankruptcy,
              insolvency or similar laws affecting creditors' rights generally.

         65535.VIII2.   NO CONFLICT.  The execution and delivery of this
              Agreement by Purchaser does not, and the performance of this
              Agreement by Purchaser will not, (i) require any consent,
              approval, authorization or permit of, or filing with or
              notification to (other than pursuant to the HSR Act, the Exchange
              Act and the Other Regulatory Approvals), any governmental or
              regulatory authority, domestic or foreign, (ii) conflict with or
              violate the Certificate of Incorporation or By-laws of Purchaser,
              (iii) conflict with or violate any law, rule, regulation, order,
              judgment or decree applicable to Purchaser or by which any
              property or asset of Purchaser is bound, or (iv) result in any
              breach of or constitute a default (or an event which with notice
              or lapse of time or both would become a default) under, or give
              to others any right of termination, amendment, acceleration or
              cancellation of, or result in the creation of a lien or other
              encumbrance of any nature whatsoever on any property or asset of
              Purchaser pursuant to, any note, bond, mortgage, indenture,
              contract, agreement, lease, license, permit, franchise or other
              instrument or obligation to which Purchaser is a party or by
              which Purchaser or any property or asset of Purchaser is bound.

         65535.VIII3.   BROKERS.  Other than Bear, Stearns & Co., Inc., no
              broker, finder or investment banker is entitled to any brokerage,
              finder's or other fee or commission in connection with the
              transactions contemplated hereby based upon arrangements made by
              or on behalf of Purchaser.

    IX.  TERMINATION OF AGREEMENT.  Purchaser reserves the right in its sole
         discretion at any time hereafter to terminate this Agreement, the
         Options and all irrevocable proxies granted to it hereunder.



                                         -9-

    X.   MISCELLANEOUS.

         65535.X1. EXPENSES.  Except as otherwise provided herein or in the
              Merger Agreement, all costs and expenses incurred in connection
              with the transactions contemplated by this Agreement shall be
              paid by the party incurring such expenses.

         65535.X2. FURTHER ASSURANCES.  Purchaser and the Stockholders will
              execute and deliver all such further documents and instruments
              and take all such further action as may be necessary in order to
              consummate the transactions contemplated hereby.

         65535.X3. SPECIFIC PERFORMANCE.  The parties hereto agree that
              irreparable damage would occur in the event any of the provisions
              of this Agreement were not performed in accordance with the terms
              hereof and that the parties shall be entitled to specific
              performance of the terms hereof (without establishing the
              likelihood of irreparable injury or posting bond or other
              security) in addition to any other remedy to which they may be
              entitled at law or in equity.

         65535.X4. ENTIRE AGREEMENT.  This Agreement constitutes the entire
              agreement between Purchaser and the Stockholders with respect to
              the subject matter hereof and supersedes all prior agreements and
              understandings, both written and oral, between Purchaser and the
              Stockholders with respect to the subject matter hereof.

         65535.X5. ASSIGNMENT.  This Agreement shall not be assigned by
              operation of law or otherwise, except that Purchaser may assign
              all or any of its rights and obligations hereunder to any
              affiliate of Purchaser, provided that no such assignment shall
              relieve Purchaser of its obligations hereunder if such assignee
              does not perform such obligations.

         65535.X6. OBLIGATIONS OF SUCCESSORS; PARTIES IN INTEREST.  This
              Agreement shall be binding upon, inure solely to the benefit of,
              and be enforceable by, the successors and permitted assigns of
              the parties hereto.  Nothing in this Agreement, express or
              implied, is intended to or shall confer upon any other person any
              rights, benefits or remedies of any nature whatsoever under or by
              reason of this Agreement.



                                         -10-

         65535.X7. AMENDMENT; WAIVER.  This Agreement may not be amended or
              changed except by an instrument in writing signed by the parties
              hereto.  Any party hereto may (i) extend the time for the
              performance of any obligation or other act of the other party
              hereto, (ii) waive any inaccuracy in the representations and
              warranties contained herein or in any document delivered pursuant
              hereto and (iii) waive compliance with any agreement or condition
              contained herein.  Any such extension or waiver shall be valid if
              set forth in an instrument in writing signed by the party or
              parties to be bound thereby.

         65535.X8. SEVERABILITY.  The invalidity or unenforceability of any
              provision of this Agreement shall not affect the validity or
              enforceability of any other provision of this Agreement, which
              shall remain in full force and effect.

         65535.X9. NOTICES.  All notices, requests, claims, demands and other
              communications hereunder shall be in writing and shall be given
              (and shall be deemed to have been duly given upon receipt) by
              delivery in person, by cable, telecopy, telegram or telex or by
              registered or certified mail (postage prepaid, return receipt
              requested) to the respective parties at the following addresses
              (or at such other address for a party as shall be specified in a
              notice given in accordance with this Section 7(i)):

         if to Purchaser:

              Intermedia Communications Inc.
              3625 Queen Palm Drive
              Tampa, Florida 33619
              Attention: Chief Financial Officer
              Telecopy: (813) 829-2470

    with a copy to:

              Kronish, Lieb, Weiner & Hellman LLP
              1114 Avenue of the Americas
              New York, New York 10036
              Attention: Ralph J. Sutcliffe, Esq.
              Telecopy:  (212) 997-3527

    if to any Stockholder:



                                         -11-

         at the respective addresses of such Stockholder set forth at the foot
of this Agreement.

         65535.X10.     GOVERNING LAW.  This Agreement shall be governed by,
              and construed in accordance with, the laws of the State of
              Delaware applicable to contracts executed in and to be performed
              in that State.

         65535.X11.     HEADINGS.  The descriptive headings contained in this
              Agreement are included for convenience of reference only and
              shall not affect in any way the meaning or interpretation of this
              Agreement.

         65535.X12.     COUNTERPARTS.  This Agreement may be executed in one or
              more counterparts, and by the different parties hereto in
              separate counterparts, each of which when executed shall be
              deemed to be an original but all of which taken together shall
              constitute one and the same agreement.

         65535.X13.     The obligations of the Stockholders hereunder are
              several and no Stockholder shall be liable for any breach by any
              other Stockholder if his or its obligations hereunder.

         65535.X14.     WAIVER OF JURY TRIAL.  EACH PARTY HERETO WAIVES ANY
              RIGHT IT MIGHT HAVE TO A JURY TRIAL OF ANY DISPUTE ARISING IN
              CONNECTION WITH THIS AGREEMENT.

    XI.  CONSENTS.  Each of the Stockholders, the Company and RHI Holdings,
         Inc. hereby consents to the execution and delivery of this Agreement
         by all parties hereto and the grants of voting rights and Options
         pursuant hereto and agrees that all Option Shares purchased by
         Purchasers pursuant hereto shall be acquired free and clear of any
         obligation under the Shareholders Agreement.

              IN WITNESS WHEREOF, Purchaser has caused this Agreement to be
    executed by its officers thereunto duly authorized and the Stockholders and
    the Company have duly executed or caused this Agreement to be executed by
    its officers thereunto duly authorized as of the date first written above.

    PURCHASER:



                                         -12-

    INTERMEDIA COMMUNICATIONS INC.

    By:  ___________________________
         Name:     Robert M. Manning
         Title:    Senior Vice President and Chief Financial Officer

    SHAREHOLDERS:                      NUMBER OF SHARES OWNED:

    RHI HOLDINGS, INC.                 6,225,000 COMPANY COMMON STOCK
                                         250,000 COMPANY PREFERRED STOCK

    By:  ___________________________
         Name:
         Title:

    Address:  c/o The Fairchild Corporation
              300 West Service
              PO Box 10803
              Chantilly, Virginia
    Attention: Donald Miller, Esq.
    Telecopy: (703) 478-5775

                       [Signature Pages Continue on Next Page]



                                         -13-

    Anthony D. Autorino                870,416 COMPANY COMMON STOCK OPTIONS TO
                                       PURCHASE 296,667 SHARES OF COMPANY
                                       COMMON STOCK

    ____________________________________
    Address:  c/o Shared Technologies Fairchild, Inc.
              100 Great Meadow Road
              Wethersfield, Connecticut 06109
    Attention: Kenneth Doros
    Telecopy: (860) 258-2455

    Jeffrey J. Steiner                 UP TO 47,500 COMPANY COMMON STOCK
                                       OPTIONS TO PURCHASE 116,667 SHARES OF
                                       COMPANY COMMON STOCK

    ____________________________________
    Address:  c/o The Fairchild Corporation
              300 West Service
              PO Box 10803
              Chantilly, Virginia
              Attention: Donald Miller, Esq.
    Telecopy: (703) 478-5775

    SHARED TECHNOLOGIES FAIRCHILD INC.

    By:_________________________________