AT&T CORP
8-K, 1998-01-16
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549


                                    Form 8-K


                                 CURRENT REPORT



                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934


                         Date of Report: January 8, 1998



                                   AT&T CORP.


A New York                      Commission File                  I.R.S. Employer
Corporation                        No. 1-1105                     No. 13-4924710




            32 Avenue of the Americas, New York, New York 10013-2412


                         Telephone Number (212) 387-5400

<PAGE>


Form 8-K
AT&T Corp.
January 8, 1998


Item 2.  Acquisition or Disposition of Assets.

         See Exhibit 99 to this Form 8-K.

Item 7.  Financial Statements and Exhibits.

         (c)   Exhibits.

               Exhibit 2      Agreement and Plan of Merger Among AT&T Corp.,
                              TA Merger Corp. and Teleport Communications
                              Group Inc. Dated as of January 8, 1998

               Exhibit 9      Voting Agreement By and Among AT&T Corp. and
                              Comcast Corporation, Comcast Teleport, Inc.,
                              Comcast Communications Properties, Inc.,
                              Tele-Communications, Inc., TCI Teleport, Inc.,
                              Cox Communications, Inc. and Cox Teleport
                              Partners, Inc. Dated as of January 8, 1998

               Exhibit 10     Registration Rights Agreement Between AT&T Corp.
                              and Tele-Communications, Inc., Cox Communications,
                              Inc. and Comcast Corporation Dated as of
                                 January 8, 1998

               Exhibit 99     AT&T Corp. Press Release issued January 8, 1998.



<PAGE>


Form 8-K
AT&T Corp.
January 8, 1998



                                   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 thereunto duly authorized.



                                   AT&T CORP.




                                   /s/  Marilyn J. Wasser
                                   -----------------------------------
                                   By:  Marilyn J. Wasser
                                        Vice President and Secretary



January 15, 1998

<PAGE>


                                  EXHIBIT INDEX




Exhibit
Number

2         Agreement and Plan of Merger

9         Voting Agreement

10        Registration Rights Agreement

99        AT&T Corp. Press Release issued January 8, 1998



<PAGE>


                          AGREEMENT AND PLAN OF MERGER

                                      AMONG

                                   AT&T CORP.,

                                 TA MERGER CORP.

                                       AND

                       TELEPORT COMMUNICATIONS GROUP INC.

                           DATED AS OF JANUARY 8, 1998


<PAGE>

                                TABLE OF CONTENTS


                                    ARTICLE I

Definitions                                                                    1


                                   ARTICLE II

The Merger; Effective Time; Closing                                            7

               2.1. The Merger                                                 7
               2.2. Effective Time                                             7
               2.3. Closing                                                    7


                                   ARTICLE III

Terms of Merger

               3.1. Certificate of Incorporation                               8
               3.2. The By-Laws                                                8
               3.3. Directors                                                  8
               3.4. Officers                                                   8


                                   ARTICLE IV

Share Consideration; Conversion or
    Cancellation of Shares in the Merger                                       8

           4.1.     Share Consideration; Conversion or
                       Cancellation of Shares in the Merger                    8
           4.2.     Payment for Shares in the Merger                          11
           4.3.     Fractional Shares                                         13
           4.4.     Transfer of Shares after the Effective
                       Time                                                   14


                                    ARTICLE V

Representations and Warranties of the Company                                 14

           5.1.     Organization, Etc. of the Company                         14
           5.2.     Subsidiaries                                              14
           5.3.     Agreement                                                 15
           5.4.     Permits; Compliance                                       15
           5.5.     Fairness Opinion                                          16

                                       -i-
<PAGE>

           5.6.     Capital Stock                                             16
           5.7.     Litigation                                                17
           5.8.     Compliance with Other Instruments, Etc.                   17
           5.9.     Employee Benefit Plans                                    18
          5.10.     Taxes                                                     20
          5.11.     Intellectual Property                                     21
          5.12.     Reports and Financial Statements                          21
          5.13.     Absence of Certain Changes or Events                      22
          5.14.     Affiliated Transactions and Certain
                       Other Agreements                                       22
          5.15.     Brokers and Finders                                       23
          5.16.     S-4 Registration Statement and Information
                       Statement/Prospectus                                   23
          5.17.     ACC Agreement                                             24

                                   ARTICLE VI

Representations and Warranties of Parent and
    Merger Sub                                                                24

           6.1.     Organization, Etc. of Parent                              24
           6.2.     Subsidiaries                                              24
           6.3.     Agreement                                                 25
           6.4.     Permits; Compliance                                       25
           6.5.     Capital Stock                                             26
           6.6.     Parent Common Shares                                      26
           6.7.     Litigation                                                26
           6.8.     Compliance with Other Instruments, Etc.                   26
           6.9.     Taxes                                                     27
          6.10.     Intellectual Property                                     28
          6.11.     Reports and Financial Statements                          28
          6.12.     Brokers and Finders                                       29
          6.13.     S-4 Registration Statement and Information
                       Statement/Prospectus                                   30
          6.14.     Ownership of Merger Sub; No Prior Activities;
                       Assets of Merger Sub.                                  30
          6.15.     Ownership of Company or ACC Stock                         30

                                   ARTICLE VII

Additional Covenants and Agreements                                           31

           7.1.     Conduct of Business of the Company                        31
           7.2.     Other Transactions                                        35
           7.3.     Stockholder Approval                                      36
           7.4.     Registration Statement                                    37
           7.5.     Reasonable Efforts                                        37
           7.6.     Access to Information                                     39
           7.7.     Indemnification of Directors and Officers                 40
           7.8.     Registration and Listing of Parent


                                      -ii-
<PAGE>

Common Shares                                                                 41
           7.9.     Affiliates of Parent and the Company                      42
          7.10.     Tax Matters                                               42
          7.11.     New York Real Property Transfer Tax                       43
          7.12.     Employee Matters                                          43
          7.13.     Certain Covenants of Parent                               44
          7.14.     Right of First Offer                                      44


                                  ARTICLE VIII

Conditions                                                                    45

           8.1.     Conditions to Each Party's Obligations                    45
           8.2.     Conditions to Obligations of Parent
                       and Merger Sub                                         46
           8.3.     Conditions to Obligations of the Company                  48


                                   ARTICLE IX

Termination                                                                   49

           9.1.     Termination by Mutual Consent                             49
           9.2.     Termination by Either Parent or the Company               49
           9.3.     Termination by the Company                                50
           9.4.     Termination by Parent and Merger Sub                      50
           9.5.     Effect of Termination and Abandonment                     50


                                    ARTICLE X

Miscellaneous and General                                                     50

          10.1.     Expenses                                                  50
          10.2.     Notices, Etc.                                             51
          10.3.     Amendments, Waivers, Etc.                                 52
          10.4.     No Assignment                                             52
          10.5.     Entire Agreement                                          52
          10.6.     Specific Performance                                      52
          10.7.     Remedies Cumulative                                       52
          10.8.     No Waiver                                                 53
          10.9.     No Third Party Beneficiaries                              53
         10.10.     Jurisdiction                                              53
         10.11.     Public Announcements                                      53
         10.12.     Governing Law                                             53
         10.13.     Name, Captions, Etc.                                      54
         10.14.     Counterparts                                              54
         10.15.     Survival of Representations, Warranties,
                       Covenants and Agreements                               54

                                      -iii-
<PAGE>


         10.16.     Severability                                              54
         10.17.     Disclosure Statements                                     54

 EXHIBITS

A        Form of Affiliate Agreement
B        Employees Entering into Employment Agreements



















                                      -iv-
<PAGE>


                          AGREEMENT AND PLAN OF MERGER

                  AGREEMENT AND PLAN OF MERGER (this  "Agreement"),  dated as of
January 8, 1998, among AT&T Corp., a New York corporation ("Parent"),  TA Merger
Corp.,  a Delaware  corporation  and a direct wholly owned  subsidiary of Parent
("Merger Sub"), and Teleport  Communications  Group Inc., a Delaware corporation
(the "Company").


                                    RECITALS

                  WHEREAS, the Boards of Directors of Parent, Merger Sub and the
Company  each  have  determined  that  it is in  the  best  interests  of  their
respective  stockholders for Merger Sub to merge with and into the Company, upon
the terms and subject to the conditions of this Agreement (the "Merger");

                  WHEREAS, for United States federal income tax purposes,  it is
intended that the Merger shall qualify as a tax-free  reorganization  within the
meaning of Section 368(a) of the Code (as defined herein);

                  WHEREAS,  it is intended that the Merger shall be recorded for
accounting purposes as a pooling of interests;

                  WHEREAS,  Parent,  Merger Sub and the  Company  desire to make
certain representations, warranties, covenants and agreements in connection with
the Merger; and

                  WHEREAS,  Parent and Merger Sub have required,  as a condition
to their willingness to enter into this Agreement,  that the Cable  Stockholders
(as  defined  herein)  contemporaneously  enter  into the Voting  Agreement  and
execute and deliver the  Stockholders  Consent (as defined  herein)  immediately
following the execution and delivery of this Agreement.

                  NOW,    THEREFORE,    in    consideration    of   the   mutual
representations,  warranties, covenants and agreements set forth herein, Parent,
Merger Sub and the Company hereby agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

                  As used in this Agreement,  the following terms shall have the
respective meanings set forth below:

                  "ACC":  ACC Corp., a Delaware corporation.


<PAGE>


                  "ACC Agreement": The Agreement and Plan of Merger by and among
the Company,  TCG Merger Co.,  Inc. and ACC dated as of November 26, 1997, as it
may be amended from time to time.

                  "Acquisition Proposal":  As defined in Section 7.2.

                  "Affiliate":  As defined in Rule 12b-2 under the Exchange Act.

                  "Authorization":  Any consent,  approval or authorization  of,
expiration or termination of any waiting period requirement  (including pursuant
to the HSR Act) by,  or  filing,  registration,  qualification,  declaration  or
designation with, any Governmental Body.

                  "Benefit Arrangement":  As defined in Section 5.9(a).

                  "Cable  Stockholder":  Each of  Comcast  Corporation,  Comcast
Teleport,  Inc., Comcast  Communications  Properties,  Inc., Cox Communications,
Inc., Cox Teleport Partners, Inc.,  Tele-Communications,  Inc. and TCI Teleport,
Inc.  (which,   collectively,   shall  be  referred  to  herein  as  the  "Cable
Stockholders").

                  "Certificate  of  Merger":  The  certificate  of  merger  with
respect to the merger of Merger Sub with and into the  Company,  containing  the
provisions  required by, and  executed in  accordance  with,  Section 251 of the
DGCL.

                  "Certificates":  As defined in Section 4.2(b).

                  "Claim": As defined in Section 7.7(a).

                  "Class A Common Stock":  Class A Common Stock,  par value $.01
per share, of the Company.

                  "Class B Common Stock":  Class B Common Stock,  par value $.01
per share, of the Company.

                  "Closing":  The closing of the Merger.

                  "Closing Date":  The date on which the Closing occurs.

                  "Code": The Internal Revenue Code of 1986, as amended, and all
regulations promulgated thereunder, as in effect from time to time.

                  "Company":  Teleport  Communications  Group  Inc.,  a Delaware
corporation.

                                      -2-
<PAGE>


                  "Company  Disclosure  Statement":  The  disclosure  statement,
dated the date of this Agreement, delivered by the Company to Parent.

                  "Company Option":  As defined in Section 4.1(e).

                  "Company Permits":  As defined in Section 5.4.

                  "Company SEC Reports":  As defined in Section 5.12.

                  "Company Stock Incentive Right": As defined in Section 4.1(f).

                  "Company Stock Purchase Plan":  As defined in Section 4.1(h).

                  "Company Stock Unit":  As defined in Section 4.1(g).

                  "Controlled Group Liability":  As defined in Section 5.9(e).

                  "DGCL":  The Delaware General Corporation Law.

                  "Effective Time":  As defined in Section 2.2.

                  "Employee Plan":  As defined in Section 5.9(a).

                  "Employees":  As defined in Section 5.9(a).

                  "ERISA":  The Employee Retirement Income Security Act of 1974,
as amended, and all regulations promulgated  thereunder,  as in effect from time
to time.

                  "ERISA  Affiliates":  Any trade or  business,  whether  or not
incorporated, that is now or has at any time in the past five years been treated
as a single employer with the Company or any of its  Subsidiaries  under Section
414(b) or (c) of the Code and the Treasury Regulations thereunder.

                  "Excess Shares":  As defined in Section 4.3.

                  "Exchange  Act":  The  Securities  Exchange  Act of  1934,  as
amended.

                  "Exchange Agent":  As defined in Section 4.2(a).

                  "Exchange Fund":  As defined in Section 4.2(a).

                  "Exchange Ratio":  As defined in Section 4.1(a).

                                      -3-
<PAGE>


                  "FCC":  The Federal Communications Commission.

                  "FCC Consent":  Actions by the FCC granting its consent to the
transfer of control of the FCC Licenses in connection  with the  consummation of
the transactions contemplated hereby.

                  "FCC Licenses":  All licenses,  permits,  construction permits
and other  authorizations  issued by the FCC in connection with the business and
operations of the Company and its Subsidiaries.

                  "Fractional Securities Fund":  As defined in Section 4.3.

                  "Governmental Body": Any federal, state, municipal,  political
subdivision or other governmental department,  court, commission, board, bureau,
agency or instrumentality, domestic or foreign.

                  "HSR Act": The Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended.

                  "Indemnified Parties":  As defined in Section 7.7(a).

                  "Information Statement/Prospectus": As defined in Section 7.4.

                  "Intellectual   Property":  All  industrial  and  intellectual
property rights, including Proprietary Technology, patents, patent applications,
trademarks,  trademark  applications and registrations,  service marks,  service
mark  applications and  registrations,  copyrights,  know-how,  licenses,  trade
secrets,  proprietary  processes,  formulae  and  customer  lists.  "Proprietary
Technology"  means  all  proprietary  processes,   formulae,  inventions,  trade
secrets,  know-how,  development tools and other proprietary  rights used by the
Company and its Subsidiaries or Parent and its Subsidiaries, as the case may be,
pertaining to any product, software or service manufactured,  marketed, licensed
or sold by the Company and its Subsidiaries or Parent and its  Subsidiaries,  as
the case may be, in the conduct of their business or used, employed or exploited
in the  development,  license,  sale,  marketing,  distribution  or  maintenance
thereof, and all documentation and media constituting, describing or relating to
the above, including manuals, memoranda,  know-how, notebooks, software, records
and disclosures.

                  "knowledge": With respect to the Company, the actual knowledge
of any executive officer  (determined in accordance with Rule 16a-1(f) under the
Exchange Act as in effect on the date  hereof) of the Company and,  with respect
to Parent or Merger Sub,

                                      -4-
<PAGE>


the actual  knowledge of any executive  officer  (determined in accordance  with
Rule 16a-1(f)  under the Exchange Act as in effect on the date hereof) of Parent
or Merger Sub, as the case may be.

                  "Law": Any foreign or domestic law, statute,  code, ordinance,
rule, regulation  promulgated,  or order, judgment,  writ,  stipulation,  award,
injunction or decree entered by a Governmental Body.

                  "LEC":  A local exchange carrier.

                  "Material  Adverse Effect":  On any Person, a material adverse
effect on the business,  properties,  operations or financial  condition of such
Person and its  Subsidiaries  taken as a whole,  other than any such  effect (i)
arising out of or resulting from general economic  conditions,  (ii) arising out
of or resulting  from changes in or affecting  the  telecommunications  business
generally,  or, in the case of a  determination  with  respect to Parent and its
Subsidiaries,  the long distance  telecommunications  business generally, or, in
the case of a  determination  with respect to the Company and its  Subsidiaries,
the competitive local exchange carrier business generally,  or (iii) arising out
of or resulting from, in the case of a determination with respect to the Company
and  its  Subsidiaries,  any  loss  of  customer  revenues  attributable  to the
announcement of this Agreement and the transactions  contemplated hereby, or, in
the case of a  determination  with respect to Parent and its  Subsidiaries,  the
entry  of  the  Regional  Bell  Operating   Companies  into  the  long  distance
telecommunications business.

                  "Merger":  The merger of Merger Sub with and into the  Company
as contemplated by Section 2.1.

                  "Merger Sub":  TA Merger Corp., a Delaware corporation.

                  "NYSE":  The New York Stock Exchange, Inc.

                  "Parent":  AT&T Corp., a New York corporation.

                  "Parent  Common  Shares":  Shares of common  stock,  par value
$1.00 per share, of Parent.

                  "Parent Disclosure Statement": The disclosure statement, dated
the date of this Agreement, delivered by Parent to the Company.

                  "Parent Option":  As defined in Section 4.1(e).

                  "Parent Permits":  As defined in Section 6.4.


                                       -5-
<PAGE>

                  "Parent Representatives":  As defined in Section 7.6.

                  "Parent SEC Reports":  As defined in Section 6.10(a).

                  "Parent Stock Incentive Right":  As defined in Section 4.1(f).

                  "Parent Stock Unit":  As defined in Section 4.1(g).

                  "Permit":  Any  franchise,  grant,   authorization,   license,
permit, easement, variance, exception, consent, certificate, approval, clearance
or order of any Governmental Body.

                  "Person": Any individual or corporation, company, partnership,
trust, incorporated or unincorporated association, joint venture or other entity
of any kind.

                  "Proposed Financing":  As defined in Section 7.14.

                  "Rule 145 Affiliate":  As defined in Section 7.9.

                  "S-4 Registration Statement":  As defined in Section 7.4.

                  "SEC":  The Securities and Exchange Commission.

                  "Securities Act":  The Securities Act of 1933, as amended.

                  "Share Consideration":  As defined in Section 4.1(b).

                  "Shares": Collectively, the shares of Class A Common Stock and
the shares of Class B Common Stock.

                  "Stockholders'    Agreement":   The   Amended   and   Restated
Stockholders'  Agreement,  dated June 26,  1996,  by and among the  Company  and
Comcast Teleport,  Inc., Comcast Communications  Properties,  Inc., Cox Teleport
Partners, Inc., and TCI Teleport, Inc.

                  "Stockholders Consent":  As defined in Section 7.3.

                  "Subsidiary":  As to any Person,  any other Person of which at
least 50% of the equity and voting interests are owned, directly or
indirectly, by such first Person.

                  "Surviving  Corporation":  The  surviving  corporation  in the
Merger.

                  "Tax":  As defined in Section 5.10(d).

                                      -6-
<PAGE>

                  "Tax Return":  As defined in Section 5.10(d).

                  "US Wats":  US Wats, Inc., a New York corporation.

                  "US Wats Agreement":  The Agreement and Plan of Merger,  dated
as of October 28, 1997, by and among ACC, ACC  Acquisition  - Blue Corp.  and US
Wats.

                  "Voting  Agreement":  The  Voting  Agreement,  dated  the date
hereof, by and among Parent and each of the Cable Stockholders.

                  "Wholly-Owned  Subsidiary":  As to any Person, a Subsidiary of
such Person 100% of the equity and voting  interest in which is owned,  directly
or indirectly, by such Person.


                                   ARTICLE II

                       THE MERGER; EFFECTIVE TIME; CLOSING

                  2.1. The Merger.  Subject to the terms and  conditions of this
Agreement,  at the Effective Time,  Merger Sub shall be merged with and into the
Company in  accordance  with the  provisions of Section 251 of the DGCL and with
the effect provided in Sections 259 and 261 of the DGCL. The separate  corporate
existence  of Merger  Sub shall  thereupon  cease and the  Company  shall be the
Surviving Corporation and shall continue its corporate existence as a Subsidiary
of  Parent  and  shall  continue  to be  governed  by the  laws of the  State of
Delaware.  At the  election of Parent,  any direct  Wholly-Owned  Subsidiary  of
Parent  with  respect  to which the  representation  and  warranty  set forth in
Section  6.14 is  true  and  correct  may be  substituted  for  Merger  Sub as a
constituent corporation in the Merger.

                  2.2.  Effective Time. The Merger shall become effective on the
date and at the time (the "Effective Time") that the Certificate of Merger shall
have been accepted for filing by the Secretary of State of the State of Delaware
(or such later date and time as may be specified in the Certificate of Merger by
mutual agreement of Parent,  Merger Sub and the Company),  which shall be on the
Closing Date or as soon as practicable thereafter.

                  2.3.  Closing.  Subject  to the  fulfillment  or waiver of the
conditions  set forth in Article  VIII,  the Closing shall take place (a) at the
offices of Wachtell,  Lipton,  Rosen & Katz, 51 West 52nd Street,  New York, New
York,  at 10:00 a.m.  on the  earliest  practicable  date (but no later than the
fifth business

                                      -7-
<PAGE>


day) following the satisfaction or waiver of the conditions set forth in Article
VIII (other than those  conditions  to be satisfied or waived at the Closing) or
(b) at such other place and/or time and/or on such other date as Parent,  Merger
Sub and the Company may agree.


                                   ARTICLE III

                                 TERMS OF MERGER

                  3.1.  Certificate of Incorporation.  As of the Effective Time,
the Certificate of Incorporation of the Company shall be amended pursuant to the
Certificate  of Merger to be identical to the  Certificate of  Incorporation  of
Merger  Sub in effect  immediately  prior to the  Effective  Time,  except  that
Article FIRST thereof shall read as follows: "The name of the Corporation (which
is hereinafter called the "Corporation") is Teleport  Communications Group Inc."
Such  Certificate  of  Incorporation  as so amended shall be the  Certificate of
Incorporation  of the  Surviving  Corporation,  until duly amended in accordance
with the terms  thereof and of the DGCL.  Prior to the  Effective  Time,  Parent
shall  take  such  steps  as are  necessary  so that  immediately  prior  to the
Effective Time the Certificate of  Incorporation of Merger Sub shall include the
provisions of Articles V.B. and VIII of the Certificate of  Incorporation of the
Company.

                  3.2. The By-Laws.  The By-Laws of the Company shall be amended
as of the Effective  Time to be identical to the By-Laws of Merger Sub in effect
immediately  prior to the Effective Time and, in such amended form, shall be the
By-Laws of the Surviving Corporation,  until duly amended in accordance with the
terms thereof, of the Certificate of Incorporation of the Surviving  Corporation
and of the DGCL.

                  3.3.  Directors.  The directors of Merger Sub at the Effective
Time shall, from and after the Effective Time, be the directors of the Surviving
Corporation  until their  successors  have been duly  elected or  appointed  and
qualified or until their  earlier  death,  resignation  or removal in accordance
with the Surviving Corporation's Certificate of Incorporation and By-Laws.

                  3.4.  Officers.  The officers of the Company at the  Effective
Time shall,  from and after the Effective Time, be the officers of the Surviving
Corporation  until their  successors  have been duly  elected or  appointed  and
qualified or until their  earlier  death,  resignation  or removal in accordance
with the Surviving Corporation's Certificate of Incorporation and By-Laws.

                                      -8-
<PAGE>



                                   ARTICLE IV

                       SHARE CONSIDERATION; CONVERSION OR
                      CANCELLATION OF SHARES IN THE MERGER

                  4.1. Share Consideration; Conversion or Cancellation of Shares
in the Merger.  Subject to the  provisions  of this Article IV, at the Effective
Time,  by virtue of the Merger and without any action on the part of the holders
thereof,  the  shares of the  constituent  corporations  shall be  converted  or
cancelled as follows:

                  (a) Each Share issued and outstanding immediately prior to the
         Effective Time (other than Shares owned by Parent or the Company or any
         of their respective Wholly-Owned  Subsidiaries) shall be converted into
         .943 of a Parent Common Share (the "Exchange Ratio").  If, prior to the
         Effective  Time,  Parent  should  split or combine  the  Parent  Common
         Shares,  or pay a stock dividend or other stock  distribution in Parent
         Common  Shares,  or otherwise  change the Parent Common Shares into any
         other  securities,  or make any other dividend or  distribution  on the
         Parent Common Shares (other than normal quarterly dividends as the same
         may be adjusted  from time to time in the  ordinary  course),  then the
         Exchange  Ratio will be  appropriately  adjusted to reflect such split,
         combination, dividend or other distribution or change.

                  (b) All  Shares to be  converted  into  Parent  Common  Shares
         pursuant to this  Section 4.1 shall cease to be  outstanding,  shall be
         canceled  and retired  and shall  cease to exist,  and each holder of a
         certificate representing any such Shares shall thereafter cease to have
         any rights with respect to such Shares, except the right to receive for
         each  of  the  Shares,  upon  the  surrender  of  such  certificate  in
         accordance  with  Section  4.2,  the  amount  of Parent  Common  Shares
         specified  above  (the  "Share  Consideration")  and  cash  in  lieu of
         fractional Parent Common Shares as contemplated by Section 4.3.

                  (c) Each Share issued and  outstanding  and owned by Parent or
         the  Company,  or any of their  respective  Wholly-Owned  Subsidiaries,
         immediately  prior to the Effective Time shall cease to be outstanding,
         shall be canceled  and  retired  without  payment of any  consideration
         therefor and shall cease to exist.

                  (d) Each share of Common Stock,  par value $0.01 per share, of
         Merger Sub issued and outstanding immediately

                                      -9-
<PAGE>

         prior to the Effective Time shall be converted into one share of common
         stock of the Surviving Corporation.

                  (e) At the Effective Time, each of the then outstanding  stock
         options,  if any, to purchase Shares (each, a "Company  Option") issued
         by the  Company  pursuant  to any stock  option or similar  plan of the
         Company,  and any  non-plan  options  set forth in  Section  5.6 of the
         Company  Disclosure  Statement  issued by the  Company  pursuant  to an
         option  agreement or  otherwise,  shall,  by virtue of the Merger,  and
         without  any  further  action  on the part of any  holder  thereof,  be
         assumed by Parent and converted  into an option (a "Parent  Option") to
         purchase that number of Parent Common Shares  determined by multiplying
         the number of Shares  subject to such Company  Option at the  Effective
         Time by the  Exchange  Ratio,  at an exercise  price per Parent  Common
         Share  equal to the  exercise  price per share of such  Company  Option
         immediately  prior to the Effective Time divided by the Exchange Ratio,
         rounded down to the nearest whole cent.  If the  foregoing  calculation
         results in an assumed  Company Option being  exercisable for a fraction
         of a Parent  Common  Share,  then the  number of Parent  Common  Shares
         subject to such option shall be rounded up to the nearest  whole number
         of shares,  with no cash being payable for such fractional  share.  The
         terms and  conditions of each Parent Option shall  otherwise  remain as
         set forth in the Company Option converted into such Parent Option.  The
         adjustment  provided  herein  with  respect  to any  options  which are
         "incentive stock options" (as defined in Section 422 of the Code) shall
         be and is intended to be effected in a manner which is consistent  with
         Section 424(a) of the Code.

                  (f) At the Effective Time, each of the then outstanding  stock
         incentive  rights to acquire Shares (each,  a "Company Stock  Incentive
         Right")  held by any  Person  as a result  of the  consummation  of the
         transactions  contemplated by the ACC Agreement shall, by virtue of the
         Merger,  and  without  any  further  action  on the part of any  holder
         thereof,  be assumed by Parent  and  converted  into a right (a "Parent
         Stock Incentive  Right") to acquire that number of Parent Common Shares
         determined by multiplying  the number of Shares subject to such Company
         Stock  Incentive  Right at the Effective Time by the Exchange Ratio. If
         the foregoing calculation results in an assumed Company Stock Incentive
         Right  providing  the right to  acquire a fraction  of a Parent  Common
         Share,  then the number of Parent Common  Shares  subject to such right
         shall be rounded up to the nearest whole number of shares, with no cash
         being payable for such  fractional  share.  The terms and conditions of
         each Parent Stock Incentive  Right shall otherwise  remain as set forth
         in

                                      -10-
<PAGE>


         the Company Stock  Incentive  Right  converted  into such  Parent Stock
         Incentive Right.

                  (g) At the Effective Time, each of the then outstanding  share
         units under the Company's 1996 Equity  Incentive Plan (each, a "Company
         Stock Unit")  shall,  by virtue of the Merger,  and without any further
         action on the part of any  holder  thereof,  be  assumed  by Parent and
         converted  into a right (a "Parent  Stock Unit") to receive that number
         of Parent Common Shares  determined by multiplying the number of Shares
         subject  to  such  Company  Stock  Unit  at the  Effective  Time by the
         Exchange  Ratio.  If the  foregoing  calculation  results in an assumed
         Company  Stock Unit  providing  the right to  acquire a  fraction  of a
         Parent Common Share, then the number of Parent Common Shares subject to
         such right shall be rounded up to the nearest  whole  number of shares,
         with no cash being  payable for such  fractional  share.  The terms and
         conditions  of each  Parent  Stock Unit shall  otherwise  remain as set
         forth in the Company Stock Unit  converted into such Parent Stock Unit.
         The Company shall take all necessary action prior to the Effective Time
         to amend  the  Company's  1996  Equity  Incentive  Plan to  permit  the
         assumption  and  conversion  described  in this  Section  4.1(g) and to
         provide  that all  determinations  made by reference to Shares shall be
         made by reference to Parent Common Shares.

                  (h) The Company shall  terminate  the Company's  1997 Employee
         Stock Purchase Plan (the "Company Stock Purchase Plan") effective as of
         no later than two business days prior to the Closing Date.

         4.2. Payment for Shares in the Merger. The manner of making payment for
Shares in the Merger shall be as follows:

                  (a) At the Effective  Time,  Parent shall make available to an
         exchange  agent  selected by Parent and  reasonably  acceptable  to the
         Company (the  "Exchange  Agent"),  for the benefit of those Persons who
         immediately  prior to the Effective Time were the holders of Shares,  a
         sufficient  number of  certificates  representing  Parent Common Shares
         required to effect the delivery of the  aggregate  Share  Consideration
         required  to be  issued  pursuant  to  Section  4.1  (the  certificates
         representing  Parent  Common Shares  comprising  such  aggregate  Share
         Consideration  being  hereinafter  referred to as the "Exchange Fund").
         The Exchange Agent shall, pursuant to irrevocable instructions, deliver
         the Parent Common Shares  contemplated to be issued pursuant to Section
         4.1  and  effect  the  sales  provided  for in  Section  4.3 out of the
         Exchange  Fund.  The  Exchange  Fund  shall  not be used for any  other
         purpose.

                                      -11-
<PAGE>


                  (b) Promptly  after the  Effective  Time,  the Exchange  Agent
         shall mail to each holder of record (other than holders of certificates
         for  Shares  referred  to  in  Section  4.1(c))  of  a  certificate  or
         certificates  which immediately prior to the Effective Time represented
         outstanding  Shares  (the  "Certificates")  (i) a  form  of  letter  of
         transmittal  (which shall specify that delivery shall be effected,  and
         risk of loss and title to the Certificates shall pass, only upon proper
         delivery  of  the   Certificates   to  the  Exchange  Agent)  and  (ii)
         instructions for use in effecting the surrender of the Certificates for
         payment  therefor.  Upon surrender of Certificates  for cancellation to
         the  Exchange  Agent,  together  with such letter of  transmittal  duly
         executed  and  any  other  required  documents,   the  holder  of  such
         Certificates  shall be  entitled  to  receive  for  each of the  Shares
         represented  by  such  Certificates  the  Share  Consideration  and the
         Certificates  so  surrendered  shall  forthwith be  canceled.  Until so
         surrendered,  Certificates  shall represent solely the right to receive
         the  Share  Consideration  and any  cash in lieu of  fractional  Parent
         Common  Shares as  contemplated  by Section 4.3 with respect to each of
         the Shares  represented  thereby.  No dividends or other  distributions
         that are  declared  on the  Parent  Common  Shares  and  payable to the
         holders  of record  thereof  after the  Effective  Time will be paid to
         Persons  entitled  by reason of the  Merger to  receive  Parent  Common
         Shares  until such  Persons  surrender  their  Certificates.  Upon such
         surrender,  there  shall be paid to the Person in whose name the Parent
         Common Shares are issued any dividends or other distributions  having a
         record date after the  Effective  Time and payable with respect to such
         Parent  Common Shares  between the Effective  Time and the time of such
         surrender.  After such surrender, there shall be paid on the applicable
         payment  date, to the Person in whose name the Parent Common Shares are
         issued,  any  dividends or other  distributions  on such Parent  Common
         Shares  which  shall have a record  date after the  Effective  Time and
         prior to such surrender and a payment date after such surrender.  In no
         event shall the Persons  entitled to receive  such  dividends  or other
         distributions  be entitled to receive  interest  on such  dividends  or
         other distributions. If any cash or any certificate representing Parent
         Common  Shares is to be paid to or issued in a name  other than that in
         which the Certificate  surrendered in exchange  therefor is registered,
         it shall be a  condition  of such  exchange  that  the  Certificate  so
         surrendered shall be properly endorsed and otherwise in proper form for
         transfer and that the Person  requesting such exchange shall pay to the
         Exchange  Agent any  transfer or other taxes  required by reason of the
         issuance of certificates for such Parent Common Shares in a name

                                      -12-
<PAGE>


         other  than  that  of  the   registered   holder  of  the   Certificate
         surrendered,  or shall establish to the reasonable  satisfaction of the
         Exchange  Agent  that  such  tax has  been  paid or is not  applicable.
         Notwithstanding the foregoing, neither the Exchange Agent nor any party
         hereto  shall be liable to a holder of  Shares  for any  Parent  Common
         Shares or dividends thereon or other distributions with respect thereto
         or, in accordance with Section 4.3,  proceeds of the sale of fractional
         interests,  delivered  to a  public  official  pursuant  to  applicable
         escheat  law.  The  Exchange  Agent  shall not be  entitled  to vote or
         exercise  any rights of  ownership  with  respect to the Parent  Common
         Shares held by it from time to time hereunder,  except that, subject to
         applicable  escheat  law, it shall  receive and hold all  dividends  or
         other  distributions  paid or  distributed  with respect to such Parent
         Common Shares for the account of the Persons entitled thereto.

                  (c)  Certificates  surrendered  for  exchange  by  any  Person
         constituting a Rule 145 Affiliate of the Company shall not be exchanged
         for  certificates  representing  Parent  Common Shares until Parent has
         received a written  agreement  from such  Person as provided in Section
         7.9.
                  (d) Any  portion  of the  Exchange  Fund  and  the  Fractional
         Securities Fund (and any dividends or other  distributions with respect
         to such portion of the Exchange  Fund) which  remains  unclaimed by the
         former  stockholders  of the Company  for one year after the  Effective
         Time shall be  delivered  to  Parent,  upon  demand of Parent,  and any
         former stockholders of the Company shall thereafter look only to Parent
         for  payment of their claim for the Share  Consideration  (and any such
         dividends or other distributions) or for any cash in lieu of fractional
         Parent Common Shares.

                  (e) In the event that any Certificate has been lost, stolen or
         destroyed,  upon the making of an  affidavit of that fact by the Person
         claiming  such  Certificate  to be lost,  stolen or  destroyed  and, if
         required by the Surviving Corporation,  the posting by such Person of a
         bond in such  reasonable  amount as  Parent  may  direct  as  indemnity
         against  any claim  that may be made  against  it with  respect to such
         Certificate,  Parent  will,  in  exchange  for  such  lost,  stolen  or
         destroyed Certificate, issue or cause to be issued the number of Parent
         Common  Shares and pay or cause to be paid any amounts  deliverable  in
         respect thereof pursuant to this Article IV.

                  4.3.  Fractional  Shares.  No fractional  Parent Common Shares
shall be issued in the Merger. In lieu of any such fractional  securities,  each
holder of Shares who would  otherwise

                                      -13-
<PAGE>


have been  entitled to a fraction of a Parent  Common  Share upon  surrender  of
Certificates for exchange  pursuant to this Article IV will be paid an amount in
cash (without interest) equal to such holder's proportionate interest in the net
proceeds  from the sale or sales in the open market by the  Exchange  Agent,  on
behalf of all such  holders,  of the aggregate  fractional  Parent Common Shares
issued  pursuant  to this  Article  IV.  As soon as  practicable  following  the
Effective  Time, the Exchange Agent shall determine the excess of (a) the number
of full Parent Common Shares  delivered to the Exchange Agent by Parent over (b)
the aggregate  number of full Parent Common Shares to be  distributed to holders
of Shares  (such  excess  being  herein  called the  "Excess  Shares"),  and the
Exchange Agent, as agent for the former holders of Shares, shall sell the Excess
Shares at the  prevailing  prices on the NYSE.  The sale of the Excess Shares by
the  Exchange  Agent shall be  executed  on the NYSE  through one or more member
firms of the NYSE and shall be executed in round lots to the extent practicable.
Parent  shall  pay all  commissions,  transfer  taxes  and  other  out-of-pocket
transaction  costs,  including  the  expenses and  compensation  of the Exchange
Agent,  incurred in connection  with such sale of Excess  Shares.  Until the net
proceeds of such sale have been  distributed to the former  stockholders  of the
Company,  the  Exchange  Agent will hold such  proceeds in trust for such former
stockholders  (the "Fractional  Securities  Fund"). As soon as practicable after
the determination of the amount of cash to be paid to former stockholders of the
Company in lieu of any  fractional  interests,  the  Exchange  Agent  shall make
available  in  accordance  with  this  Agreement  such  amounts  to such  former
stockholders.

                  4.4. Transfer of Shares after the Effective Time. No transfers
of Shares  shall be made on the stock  transfer  books of the Company  after the
close of business on the day prior to the date of the Effective Time.


                                    ARTICLE V

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

                  The  Company  hereby  represents  and  warrants  to Parent and
Merger Sub that, except as set forth in the Company  Disclosure  Statement (each
section of which  qualifies  the  correspondingly  numbered  representation  and
warranty or covenant as specified therein):

                  5.1.  Organization,  Etc.  of the  Company.  The  Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware and has all requisite  corporate power and authority to
own and operate its

                                      -14-
<PAGE>


properties  and to carry on its  business as now  conducted  and proposed by the
Company to be conducted.  The Company is duly  qualified and in good standing in
each  jurisdiction in which the property owned,  leased or operated by it or the
nature of the business  conducted by it makes such  qualification  necessary and
where the  failure to be so  qualified  or in good  standing  has or would have,
individually or in the aggregate, a Material Adverse Effect on the Company.

                  5.2.  Subsidiaries.  Section  5.2  of the  Company  Disclosure
Statement  contains a complete and accurate list of all of the  Subsidiaries  of
the  Company as of the date  hereof.  Each  Subsidiary  of the  Company (a) is a
corporation  or other legal  entity duly  organized,  validly  existing  and (if
applicable)  in  good  standing  under  the  laws  of  the  jurisdiction  of its
organization and has all requisite  corporate,  partnership or similar power and
authority  to own its  properties  and conduct its business  and  operations  as
currently  conducted,  except  where the failure to be duly  organized,  validly
existing and in good standing or to have such power and  authority  does not and
would not have,  individually or in the aggregate,  a Material Adverse Effect on
the Company, and (b) is duly qualified and in good standing in each jurisdiction
in which the  property  owned,  leased or  operated  by it or the  nature of the
business  conducted by it makes such qualification  necessary,  except where the
failure  to be so  qualified  or in good  standing  does not and would not have,
individually or in the aggregate, a Material Adverse Effect on the Company.

                  5.3. Agreement.  The Company has all necessary corporate power
and authority to execute and deliver this Agreement,  to perform its obligations
hereunder and to consummate the transactions contemplated hereby. This Agreement
and  the  consummation  of  the  transactions   contemplated  hereby  have  been
unanimously approved by the Board of Directors of the Company and have been duly
authorized by all other necessary  corporate  action on the part of the Company,
except,  in the case of the  Merger  only,  for the  approval  of the  Company's
stockholders  contemplated by Section 7.3. This Agreement has been duly executed
and  delivered by a duly  authorized  officer of the Company and  constitutes  a
valid and binding agreement of the Company,  enforceable  against the Company in
accordance with its terms. The Board of Directors of the Company has unanimously
approved  the  transactions  contemplated  by  this  Agreement  and  the  Voting
Agreement,  including the Merger,  so as to render the provisions of Section 203
of the DGCL inapplicable to the transactions  contemplated by this Agreement and
to Parent  and  Merger  Sub in  connection  with this  Agreement  and the Voting
Agreement.  The  Board of  Directors  of the  Company  has  directed  that  this
Agreement be submitted to the stockholders of the Company for

                                      -15-
<PAGE>


their approval.  The affirmative  approval,  by vote or written consent,  of the
holders of Shares  representing  a majority of the votes that may be cast by the
holders of all outstanding Shares (voting as a single class) is the only vote of
the holders of any class or series of capital stock of the Company  necessary to
adopt this Agreement and approve the Merger.

                  5.4.  Permits;   Compliance.  Each  of  the  Company  and  its
Subsidiaries  is in  possession  of all Permits  from  appropriate  Governmental
Bodies  (including the FCC) necessary for the Company or any of its Subsidiaries
to own,  lease  and  operate  its  properties  or to carry  on their  respective
businesses as they are now being conducted (the "Company Permits"), and all such
Company  Permits  are valid,  and in full  force and  effect,  except  where the
failure to have,  or the  suspension  or  cancellation  of,  any of the  Company
Permits does not and would not,  individually  or in the  aggregate,  (a) have a
Material  Adverse  Effect on the Company or (b) prevent or materially  delay the
performance of this Agreement by the Company.  No suspension or  cancellation of
any of the  Company  Permits is pending  or, to the  knowledge  of the  Company,
threatened,  except where the failure to have, or the suspension or cancellation
of, any of the Company  Permits does not and would not,  individually  or in the
aggregate,  (x) have a Material  Adverse Effect on the Company or (y) prevent or
materially  delay the performance of this Agreement by the Company.  Neither the
Company  nor any of its  Subsidiaries  is in  conflict  with,  or in  default or
violation of, (i) any Law  applicable to the Company or any of its  Subsidiaries
or by which  any  property,  asset or  operation  of the  Company  or any of its
Subsidiaries is bound or affected or (ii) any Company  Permits,  except for such
conflicts,  defaults or violations that do not and would not, individually or in
the aggregate,  (A) have a Material Adverse Effect on the Company or (B) prevent
or materially delay the performance of this Agreement by the Company.

                  5.5. Fairness  Opinion.  The Board of Directors of the Company
has received the opinion, dated as of the date hereof, of Merrill Lynch, Pierce,
Fenner & Smith Incorporated to the effect that the Exchange Ratio is fair to the
stockholders of the Company from a financial point of view.

                  5.6.  Capital  Stock.  The  authorized  capital  stock  of the
Company  consists of (a)  450,000,000  shares of Class A Common Stock,  of which
61,273,746  shares were outstanding as of the close of business on the day prior
to the date hereof,  (b)  300,000,000  shares of Class B Common Stock,  of which
113,489,040 shares were outstanding as of the close of business on the day prior
to the date hereof,  and (c) 150,000,000  shares of preferred  stock,  par value
$.01 per share,  none of which is outstanding.  All outstanding  Shares are duly
authorized, validly issued, fully

                                      -16-
<PAGE>


paid and nonassessable, and no class of capital stock of the Company is entitled
to preemptive rights. There are no options,  warrants or other rights to acquire
capital stock (or securities convertible into or exercisable or exchangeable for
capital stock) from the Company,  other than (a) the issuance of up to a maximum
of  23,239,673  shares of Class A Common  Stock  pursuant  to the ACC  Agreement
(including  with respect to options or other  rights to acquire  common stock of
ACC that are or may become  outstanding  and that will be converted into similar
rights  to  acquire  shares of Class A Common  Stock  upon  consummation  of the
transactions contemplated by the ACC Agreement), (b) the right of the holders of
Class B Common  Stock to  convert  shares of Class B Common  Stock  into Class A
Common Stock pursuant to the Certificate of  Incorporation  of the Company,  (c)
options or other rights outstanding as of the close of business on the day prior
to the date  hereof  representing  in the  aggregate  the right to  purchase  or
otherwise  acquire up to 6,278,000  shares of Class A Common  Stock  pursuant to
Employee Plans or Benefit  Arrangements  (plus any options granted in accordance
with  Section  7.1(a)  after the date  hereof),  and (d) the  right of  eligible
employees to purchase  shares of Class A Common  Stock  pursuant to the terms of
the Company Stock Purchase Plan as in effect on the date hereof.  From the close
of  business  on the day prior to the date hereof  until the  execution  of this
Agreement, the Company has not issued any capital stock or any options, warrants
or other rights to acquire  capital  stock (or  securities  convertible  into or
exercisable or exchangeable for capital stock) other than the issuance of shares
of Class A Common  Stock  pursuant  to options  referred to in clause (c) of the
immediately preceding sentence that were outstanding as of the close of business
on the day prior to the date hereof. All outstanding shares of capital stock of,
or other equity or voting interest in, the Subsidiaries of the Company are owned
by the Company or a direct or indirect  Wholly-Owned  Subsidiary of the Company,
free and clear of all liens,  charges,  encumbrances,  claims and options of any
nature and no Person has any right to acquire any shares of capital stock of, or
other equity or voting interest in, any Subsidiary of the Company.

                  5.7.  Litigation.  Except  as  disclosed  in the  Company  SEC
Reports  filed  prior  to  January  1,  1998,  there  are  no  actions,   suits,
investigations or proceedings  (adjudicatory,  rulemaking or otherwise)  pending
or, to the  knowledge of the Company,  threatened  against the Company or any of
its Subsidiaries (or any Employee Plan or Benefit Arrangement),  or any property
of the Company or any such Subsidiary (including Intellectual Property),  before
any arbitrator of any kind or in or before or by any Governmental  Body,  except
actions,  suits,  investigations  or proceedings  which,  individually or in the
aggregate,  do not and  would  not (a) have a  Material  Adverse  Effect  on the
Company or

                                      -17-
<PAGE>


(b)  prevent  or  materially  delay the  performance  of this  Agreement  by the
Company.

                  5.8.  Compliance  with Other  Instruments,  Etc.  Neither  the
Company nor any Subsidiary of the Company is in violation of any term of (a) its
charter, by-laws, other organizational documents or the Stockholders' Agreement,
or (b) any agreement or instrument related to indebtedness for borrowed money or
any  other  agreement  to  which it is a party  or by  which  it is  bound,  the
consequences of which violation, whether individually or in the aggregate, do or
would (i) have a  Material  Adverse  Effect on the  Company  or (ii)  prevent or
materially  delay  the  performance  of  this  Agreement  by  the  Company.  The
execution,  delivery and  performance of this Agreement and the  consummation of
the  transactions  contemplated  hereby will not result in any  violation  of or
conflict with, constitute a default under, require any consent, waiver or notice
under  any term of, or result in the  reduction  or loss of any  benefit  or the
creation or  acceleration  of any right or  obligation  under,  (a) the charter,
by-laws  or  other  organizational  document  of  the  Company  (or  any  of its
Subsidiaries) or (b) any agreement, note, bond, mortgage,  indenture,  contract,
lease, Permit or other obligation or right (excluding options, restricted stock,
employment  contracts and other employee related obligations or rights which are
addressed in Section 5.9(f)) to which the Company or any of its  Subsidiaries is
a party or by which any of the assets or properties of the Company or any of its
Subsidiaries  is bound,  or any  instrument or Law, or result in the creation of
(or impose any obligation on the Company or any of its  Subsidiaries  to create)
any mortgage,  lien, charge,  security interest or other encumbrance upon any of
the properties or assets of the Company or any of its  Subsidiaries  pursuant to
any such  term,  except  in the case of clause  (b) where any of the  foregoing,
individually  or in the  aggregate,  does not and would not (i) have a  Material
Adverse  Effect  on  the  Company  or  (ii)  prevent  or  materially  delay  the
performance of this Agreement by the Company.

                  5.9.  Employee  Benefit  Plans.  (a)  The  Company  Disclosure
Statement  sets  forth as of the date  hereof a true and  complete  list of each
"employee benefit plan" (as defined in Section 3(3) of ERISA) of the Company and
its Subsidiaries in which current or former  employees,  agents,  directors,  or
independent  contractors  of  the  Company  or  its  Subsidiaries  ("Employees")
participate or pursuant to which the Company or any of its Subsidiaries may have
a liability with respect to Employees (each, an "Employee Plan"), and each other
plan,  program,   policy,  contract  or  arrangement  of  the  Company  and  its
Subsidiaries  providing  for bonuses,  pensions,  deferred  pay,  stock or stock
related  awards,   severance  pay,  salary  continuation  or  similar  benefits,
hospitalization, medical, dental or disability bene-

                                      -18-
<PAGE>


fits, life insurance or other employee  benefits,  or compensation to or for any
Employees  or any  beneficiaries  or  dependents  of any  Employees  (other than
directors' and officers' liability  policies),  whether or not insured or funded
(each, a "Benefit  Arrangement").  Except as disclosed on the Company Disclosure
Statement, neither the Company nor any of its Subsidiaries has any commitment to
establish any additional Employee Plans or Benefit  Arrangements or to modify or
change any existing Employee Plan or Benefit  Arrangement.  The Company has made
available to Parent with respect to each Employee Plan and Benefit  Arrangement:
(i) a true and complete copy of all written  documents  comprising such Employee
Plan or Benefit  Arrangement  (including  amendments and  individual  agreements
relating  thereto)  or, if there is no such  written  document,  an accurate and
complete description of such Employee Plan or Benefit Arrangement; (ii) the most
recent  Form  5500  or  Form  5500-C  (including  all  schedules  thereto),   if
applicable; (iii) the most recent financial statements and actuarial reports, if
any;  (iv) the summary  plan  description  currently  in effect and all material
modifications  thereof, if any; and (v) the most recent Internal Revenue Service
determination letter, if any.

                  (b)  Each  Employee  Plan  and  Benefit  Arrangement  has been
established  and maintained in accordance  with its terms and in compliance with
all  applicable  Laws,   including  ERISA  and  the  Code  (and  the  prohibited
transaction provisions of ERISA and the Code), and all contributions required to
be made to the  Employee  Plans  and  Benefit  Arrangements  have been made in a
timely fashion,  except where such failure to establish,  maintain or comply, or
to make such contributions, individually or in the aggregate, does not and would
not have a Material  Adverse  Effect on the Company.  Each Employee Plan that is
intended  to be  qualified  under  Section  401(a)  of the Code has  received  a
favorable  determination  letter from the Internal Revenue Service,  and, to the
knowledge of the Company, no event has occurred which results or would result in
a revocation of such letter.
                  (c) No Employee Plan is subject to Title IV of ERISA.

                  (d) No Employee Plan is a "multiemployer  plan" (as defined in
Section  3(37) of ERISA) or a  "multiple  employer  plan"  described  in Section
4063(a) of ERISA,  and the  Company  has not at any time in the past five years,
contributed to or been obligated to contribute to such a  multiemployer  plan or
multiple employer plan.

                  (e)  Neither  the  Company  nor any  ERISA  Affiliate  has any
material  Controlled Group Liability,  nor do any circumstances exist that could
result in any of them having any Controlled Group Liability.  "Controlled  Group
Liability"  means any and all  liabilities  under  (i)  Title IV of ERISA,  (ii)
Section 302 of

                                      -19-
<PAGE>


ERISA,  (iii)  Sections  412 and  4971 of the  Code,  or (iv)  the  continuation
coverage  requirements of Sections 601 et seq. of ERISA and section 4980B of the
Code.

                  (f) None of the execution or delivery of this  Agreement,  the
Voting Agreement,  stockholder approval of the Merger by the stockholders of the
Company pursuant to the Stockholders  Consent or otherwise,  or the consummation
of the  transactions  contemplated  hereby or thereby  (either alone or together
with any  additional  or  subsequent  events),  constitutes  an event  under any
Employee Plan, Benefit Arrangement, loan to, or individual agreement or contract
with,  an Employee  that may result in any payment  (whether of severance pay or
otherwise),  restriction  or limitation  upon the assets of any Employee Plan or
Benefit Agreement,  acceleration of payment or vesting,  increase in benefits or
compensation,  or  required  funding,  with  respect  to  any  Employee,  or the
forgiveness of any loan or other commitment of any Employees.

                  (g)  There are no  actions,  suits,  arbitrations,  inquiries,
investigations  or other  proceedings  (other than routine  claims for benefits)
pending or, to the Company's knowledge, threatened, with respect to any Employee
Plan or Benefit  Arrangement,  except for any of the  foregoing  that do not and
would not have,  individually or in the aggregate,  a Material Adverse Effect on
the Company.

                  (h) Except as disclosed on the Company  Disclosure  Statement,
no amounts paid or payable by the Company or any  Subsidiary  to or with respect
to any Employee  (including  any such amounts that may be payable as a result of
the  execution  and delivery of this  Agreement  or the Voting  Agreement or the
consummation of the transactions contemplated hereby or thereby) will fail to be
deductible  for United States  federal  income tax purposes by reason of Section
280G of the Code.

                  (i)  No  Employees  and  no  beneficiaries  or  dependents  of
Employees  are  entitled  under any  Employee  Plan or  Benefit  Arrangement  to
post-employment  welfare  benefits  of any  kind,  including  death  or  medical
benefits, other than coverage mandated by Section 4980B of the Code.

                  (j) There are no  agreements  with,  or pending  petitions for
recognition of, a labor union or association as the exclusive  bargaining  agent
for any of the  employees  of the  Company or any of its  Subsidiaries;  no such
petitions  have been  pending  at any time  within two years of the date of this
Agreement  and,  to the  knowledge  of the  Company,  there  has  not  been  any
organizing effort by any union or other group seeking to represent any employees
of the Company or any of its Subsidiaries as their

                                      -20-
<PAGE>


exclusive  bargaining  agent at any time  within  two  years of the date of this
Agreement.  There are no labor strikes,  work stoppages or other labor troubles,
other  than  routine  grievance  matters,  now  pending,  or,  to the  Company's
knowledge, threatened, against the Company or any of its Subsidiaries which have
or would have,  individually or in the aggregate,  a Material  Adverse Effect on
the Company,  and there have not been any such labor strikes,  work stoppages or
other labor troubles,  other than routine grievance matters, with respect to the
Company or any of its  Subsidiaries  at any time within two years of the date of
this Agreement.

                  5.10.  Taxes. (a) The Company and its Subsidiaries  have filed
all income Tax Returns and all material  other  United  States  federal,  state,
county,  local and foreign Tax Returns required to be filed by them. The Company
and its  Subsidiaries  have  paid all  material  Taxes  due,  other  than  Taxes
appropriate  reserves  for  which  have  been  made in the  Company's  financial
statements  (and, to the extent  material,  such  reserves have been  accurately
described to Parent). There are no material assessments or adjustments that have
been asserted in writing against the Company or its  Subsidiaries for any period
for  which  the  Company  has not made  appropriate  reserves  in the  Company's
financial statements included in the Company SEC Reports.

                  (b)  There  are no  material  claims  or  assessments  pending
against the Company or any of its Subsidiaries for any alleged deficiency in any
Tax, and the Company has not been  notified in writing of any proposed  material
Tax claims or assessments  against the Company or any of its Subsidiaries (other
than, in each case,  claims or assessments  for which  adequate  reserves in the
Company financial  statements have been established or which are being contested
in good faith or are immaterial in amount).

                  (c) There are no liens for Taxes on the assets of the  Company
or any of its Subsidiaries, except for statutory liens for current Taxes not yet
due and payable  (and except for liens which do not and would not,  individually
or in the aggregate, have a Material Adverse Effect on the Company).

                  (d) For purposes of this  Agreement,  the term "Tax" means any
United States federal,  state, county or local, or foreign or provincial income,
gross receipts,  property, sales, use, license, excise,  franchise,  employment,
payroll, value added,  alternative or added minimum, ad valorem or transfer tax,
or any other tax,  custom,  duty or governmental fee or other like assessment or
charge of any kind whatsoever,  together with any interest or penalty imposed by
any  Governmental  Body.  The term "Tax Return" means a report,  return or other
information

                                      -21-
<PAGE>


(including any attached  schedules or any  amendments to such report,  return or
other information)  required to be supplied to or filed with a Governmental Body
with respect to any Tax,  including  an  information  return,  claim for refund,
amended return or declaration or estimated Tax.

                  5.11.  Intellectual Property. The Company and its Subsidiaries
own, or have the  defensible  right to use, the  Intellectual  Property  used in
their respective  businesses,  except where the failure to own or have the right
to use such Intellectual  Property,  individually or in the aggregate,  does not
and would not have a Material Adverse Effect on the Company.

                  5.12.  Reports and Financial  Statements.  (a) The Company has
filed all reports  (including  proxy  statements)  and  registration  statements
required  to  be  filed  with  the  SEC  since  its  initial   public   offering
(collectively,  the "Company SEC Reports"). The Company has previously furnished
or made  available  to Parent  true and  complete  copies of all the Company SEC
Reports filed prior to the date hereof.  None of the Company SEC Reports,  as of
their  respective  dates,  contained  any untrue  statement of material  fact or
omitted to state a material fact  required to be stated  therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading.  Each of the balance sheets  (including the related notes)
included in the Company SEC Reports presents fairly,  in all material  respects,
the  consolidated  financial  position of the Company and its Subsidiaries as of
the respective dates thereof,  and the other related  statements  (including the
related  notes)  included  in the Company SEC  Reports  present  fairly,  in all
material  respects,  the  results of  operations  and the  changes in  financial
position of the Company and its Subsidiaries for the respective periods or as of
the  respective  dates set  forth  therein,  all in  conformity  with  generally
accepted accounting principles consistently applied during the periods involved,
except as  otherwise  noted  therein and subject,  in the case of the  unaudited
interim financial statements, to normal year-end adjustments. All of the Company
SEC Reports,  as of their respective dates,  complied as to form in all material
respects with the  requirements  of the Exchange Act, the Securities Act and the
applicable rules and regulations thereunder.

                  (b) The  Company  and  its  Subsidiaries  have  not  made  any
misstatements  of fact,  or omitted to disclose  any fact,  to any  Governmental
Body, or taken or failed to take any action,  which  misstatements or omissions,
actions or failures to act,  individually or in the aggregate,  subject or would
subject any Company Permits  referred to in Section 5.4 to revocation or failure
to renew,  except where such revocation or failure to renew,  individually or in
the aggregate, does not and would not

                                      -22-
<PAGE>


have a Material Adverse Effect on the Company.

                  (c)  Except  (i) as and to the extent  disclosed  or  reserved
against on the balance sheet of the Company as of September 30, 1997 included in
the  Company SEC  Reports,  or (ii) as  incurred  after the date  thereof in the
ordinary course of business consistent with prior practice and not prohibited by
this Agreement,  the Company does not have any liabilities or obligations of any
nature, absolute,  accrued, contingent or otherwise and whether due or to become
due,  that,  individually  or in the  aggregate,  have or would  have a Material
Adverse Effect on the Company.

                  5.13. Absence of Certain Changes or Events.  During the period
since  September 30, 1997,  except as disclosed in the Company SEC Reports filed
prior to January 1, 1998,  (a) the business of the Company and its  Subsidiaries
has been conducted only in the ordinary  course,  consistent with past practice,
except for the execution and delivery of this Agreement and the  consummation of
the  transactions   contemplated  hereby,  and  except  as  otherwise  expressly
permitted by this Agreement, (b) neither the Company nor any of its Subsidiaries
has  taken  any  action or  omitted  to take any  action,  or  entered  into any
contract,  agreement,  commitment or  arrangement  to take any action or omit to
take any action, which, if taken or omitted after the date hereof, would violate
Section 7.1 (other than paragraphs (a), (d), (l) or (p) thereof),  and (c) there
has not been,  and nothing has  occurred  that would  have,  a Material  Adverse
Effect on the Company.

                  5.14.  Affiliated  Transactions and Certain Other  Agreements.
Set forth in Section 5.14 of the Company Disclosure Statement is an accurate and
complete  listing,  as of  the  date  hereof,  of  (a)  all  contracts,  leases,
agreements or understandings,  whether written or oral, that are material to the
Company  and  its  Subsidiaries  taken  as a  whole,  with or on  behalf  of any
Affiliate of the Company (other than its  Wholly-Owned  Subsidiaries)  or any of
the  Cable  Stockholders  or any of their  respective  Affiliates,  to which the
Company or any of its Subsidiaries is a party or is otherwise bound, or by which
any of their  respective  properties  or assets  is  subject  or bound,  (b) all
contracts,  leases,  agreements or  understandings,  whether written or oral, to
which the Company or any of its  Subsidiaries  is a party or is otherwise  bound
which contain any restriction or limitation on the ability of the Company or any
of its  Affiliates  (other  than the Cable  Stockholders  and their  non-Company
Affiliates) to engage in any business anywhere in the world, other than any such
contracts,  leases,  agreements or  understandings  the loss or breach of which,
individually or in the aggregate, does not and would not have a Material Adverse

                                      -23-
<PAGE>


Effect  on  the  Company,   and  (c)  all  contracts,   leases,   agreements  or
understandings,  whether written or oral, giving any Person the right to require
the Company to register Shares or to participate in any  registration of Shares.
The  Company  has  previously  provided  or made  available  to Parent  true and
complete copies of each of the foregoing agreements.

                  5.15.  Brokers and  Finders.  Except for the fees and expenses
payable to Merrill Lynch,  Pierce,  Fenner & Smith Incorporated,  which fees and
expenses are reflected in its agreements with the Company,  copies of which have
been furnished to Parent,  the Company has not employed any  investment  banker,
broker,  finder,  consultant or intermediary in connection with the transactions
contemplated  by this  Agreement  which  would  be  entitled  to any  investment
banking,  brokerage,  finder's or similar fee or commission  in connection  with
this Agreement or the transactions contemplated hereby.

                  5.16.    S-4    Registration    Statement   and    Information
Statement/Prospectus.  None of the information supplied or to be supplied by the
Company in writing  for  inclusion  or  incorporation  by  reference  in the S-4
Registration Statement or the Information  Statement/Prospectus  will (a) in the
case of the S-4  Registration  Statement,  at the  time  it  becomes  effective,
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated  therein or necessary in order to make the statements
therein   not   misleading   or   (b)   in   the   case   of   the   Information
Statement/Prospectus,  at the time of the  mailing  thereof,  contain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated therein or necessary in order to make the statements therein, in light of
the  circumstances  under which they are made,  not  misleading.  If at any time
prior to the Effective Time any event with respect to the Company,  its officers
and  directors  or any of its  Subsidiaries  shall occur which is required to be
described  in  an   amendment   of,  or  a   supplement   to,  the   Information
Statement/Prospectus or the S-4 Registration Statement, the Company shall notify
Parent  thereof by  reference  to this  Section  5.16 and such event shall be so
described. Any such amendment or supplement shall be promptly filed with the SEC
and, as and to the extent required by law,  disseminated to the  stockholders of
the  Company,  and such  amendment  or  supplement  shall comply in all material
respects   with   all   provisions   of   applicable    Law.   The   Information
Statement/Prospectus will (with respect to the Company) comply as to form in all
material respects with the requirements of the Exchange Act.

                  5.17. ACC Agreement.  As of the date hereof,  to the knowledge
of the  Company,  ACC is not in breach  in any  material  respect  of any of its
representations, warranties, covenants or

                                      -24-
<PAGE>


agreements  contained  in the ACC  Agreement.  None of the Company or any of its
Subsidiaries  is in breach in any  material  respect of any of their  respective
representations,  warranties,  covenants  or  agreements  contained  in the  ACC
Agreement.


                                   ARTICLE VI

             REPRESENTATIONS AND WARRANTIES OF PARENT AND MERGER SUB

                  Parent and  Merger Sub each  represents  and  warrants  to the
Company  that,  except as set forth in the  Parent  Disclosure  Statement  (each
section of which  qualifies  the  correspondingly  numbered  representation  and
warranty or covenant as specified therein):

                  6.1.  Organization,  Etc. of Parent.  Parent is a  corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State of New York and has all requisite corporate power and authority to own and
operate  its  properties  and to  carry on its  business  as now  conducted  and
proposed  by  Parent  to be  conducted.  Parent  is duly  qualified  and in good
standing in each jurisdiction in which the property owned, leased or operated by
it or the  nature  of the  business  conducted  by it makes  such  qualification
necessary  and where the failure to be so qualified  or in good  standing has or
would have,  individually  or in the  aggregate,  a Material  Adverse  Effect on
Parent.

                  6.2.  Subsidiaries.   Each  Subsidiary  of  Parent  (a)  is  a
corporation  or other legal  entity duly  organized,  validly  existing  and (if
applicable)  in  good  standing  under  the  laws  of  the  jurisdiction  of its
organization and has all requisite  corporate,  partnership or similar power and
authority  to own its  properties  and conduct its business  and  operations  as
currently  conducted,  except  where the failure to be duly  organized,  validly
existing and in good standing or to have such power and  authority  does not and
would not have,  individually or in the aggregate,  a Material Adverse Effect on
Parent,  and (b) is duly qualified and in good standing in each  jurisdiction in
which the property owned, leased or operated by it or the nature of the business
conducted by it makes such qualification necessary,  except where the failure to
be so qualified or in good standing does not and would not have, individually or
in the aggregate, a Material Adverse Effect on Parent.

                  6.3.  Agreement.  Each  of  Parent  and  Merger  Sub  has  all
necessary  corporate  power and authority to execute and deliver this Agreement,
to  perform  its  obligations  hereunder  and  to  consummate  the  transactions
contemplated  hereby.  This Agreement


                                      -25-
<PAGE>


and the consummation of the transactions  contemplated hereby have been approved
by the respective  Boards of Directors of Parent and Merger Sub and by Parent as
the sole  stockholder of Merger Sub, and have been duly  authorized by all other
necessary  corporate  action on the part of Parent or Merger Sub. This Agreement
has been duly executed and delivered by a duly authorized  officer of Parent and
of Merger Sub and constitutes a valid and binding agreement of Parent and Merger
Sub,  enforceable  against  Parent and Merger Sub in accordance  with its terms.
Neither Parent nor Merger Sub, nor any of their  respective  Subsidiaries was an
"interested  stockholder" of the Company, as defined for purposes of Section 203
of the DGCL, immediately prior to the approval of the transactions  contemplated
by this  Agreement  and the Voting  Agreement  by the Board of  Directors of the
Company.

                  6.4. Permits;  Compliance. Each of Parent and its Subsidiaries
is in possession of all Permits from appropriate  Governmental Bodies (including
the FCC)  necessary  for  Parent or any of its  Subsidiaries  to own,  lease and
operate its  properties or to carry on their  respective  businesses as they are
now being  conducted  (the "Parent  Permits"),  and all such Parent  Permits are
valid,  and in full force and effect,  except where the failure to have,  or the
suspension or cancellation of, any of the Parent Permits does not and would not,
individually or in the aggregate,  (a) have a Material  Adverse Effect on Parent
or (b) prevent or materially  delay the  performance of this Agreement by Parent
or Merger Sub. No suspension  or  cancellation  of any of the Parent  Permits is
pending or, to the knowledge of Parent, threatened,  except where the failure to
have, or the suspension or  cancellation  of, any of the Parent Permits does not
and would not,  individually  or in the aggregate,  (x) have a Material  Adverse
Effect on Parent or (y)  prevent or  materially  delay the  performance  of this
Agreement by Parent or Merger Sub. Neither Parent nor any of its Subsidiaries is
in conflict  with,  or in default or  violation  of, (i) any Law  applicable  to
Parent or any of its  Subsidiaries or by which any property,  asset or operation
of Parent or any of its  Subsidiaries  is bound or  affected  or (ii) any Parent
Permits, except for such conflicts, defaults or violations that do not and would
not,  individually  or in the aggregate,  (A) have a Material  Adverse Effect on
Parent or (B) prevent or materially  delay the  performance of this Agreement by
Parent or Merger Sub.

                  6.5.  Capital  Stock.  As of the date hereof,  the  authorized
capital stock of Parent consists of (a)  2,000,000,000  Parent Common Shares and
(ii) 100,000,000  shares of preferred  stock,  $1.00 par value per share. All of
the outstanding  shares of capital stock of Parent are duly authorized,  validly
issued, fully paid and nonassessable, and no class of capital stock of Parent is
entitled to preemptive rights. As of the close of

                                      -26-
<PAGE>


business  on January 1, 1998,  (i)  1,624,213,505  Parent  Common  Shares and no
shares of Parent  preferred stock were issued and outstanding and (ii) 1,269,953
Parent Common Shares were held in the treasury of Parent. Except as disclosed in
the  Parent  SEC  Reports,  all  outstanding  shares  of  capital  stock  of the
Significant  Subsidiaries  (as defined for purposes of Regulation  S-X under the
Exchange Act) of Parent are owned by Parent or a direct or indirect Wholly-Owned
Subsidiary of Parent, free and clear of all liens, charges, encumbrances, claims
and options of any nature. As of the close of business on January 1, 1998, there
were  outstanding  options  to  acquire no more than  69,000,000  Parent  Common
Shares.

                  6.6.  Parent  Common  Shares.  The Parent  Common Shares to be
issued pursuant to Article IV will,  when issued,  be duly  authorized,  validly
issued,  fully paid and nonassessable and no stockholder of Parent will have any
preemptive  right of  subscription  or purchase in respect  thereof.  The Parent
Common Shares to be issued in the Merger will, when issued,  be registered under
the  Securities  Act  and  the  Exchange  Act  and  registered  or  exempt  from
registration under any applicable state securities laws.

                  6.7. Litigation. Except as disclosed in the Parent SEC Reports
filed prior to January 1, 1998, there are no actions,  suits,  investigations or
proceedings (adjudicatory, rulemaking or otherwise) pending or, to the knowledge
of Parent,  threatened  against Parent or any of its Subsidiaries or any Benefit
Plans of Parent or any of its  Subsidiaries,  or any  property  of Parent or any
such Subsidiary (including  Intellectual  Property),  in any court or before any
arbitrator  of any kind or in or  before  or by any  Governmental  Body,  except
actions, suits,  investigations or proceedings or which,  individually or in the
aggregate,  do not and would not (a) have a Material Adverse Effect on Parent or
(b) prevent or materially  delay the  performance of this Agreement by Parent or
Merger Sub.

                  6.8.  Compliance with Other  Instruments,  Etc. Neither Parent
nor any  Subsidiary  of Parent is in  violation  of any term of (a) its charter,
by-laws or other  organizational  documents,  or (b) any agreement or instrument
related to indebtedness for borrowed money or any other agreement to which it is
a party or by which it is bound, the  consequences of which  violation,  whether
individually or in the aggregate, do or would (i) have a Material Adverse Effect
on Parent or (ii) prevent or materially  delay the performance of this Agreement
by Parent  or Merger  Sub.  The  execution,  delivery  and  performance  of this
Agreement and the consummation of the transactions  contemplated hereby will not
result in any violation of or conflict with, constitute a default under, require
any consent,  waiver or notice under any term of, or result in the  reduction or
loss of any benefit or the creation

                                      -27-
<PAGE>


or  acceleration  of any  obligation  under,  (a) the charter,  by-laws or other
organizational  document  of  Parent  (or  any of its  Subsidiaries)  or (b) any
agreement,  note, bond, mortgage,  indenture,  contract,  lease, Permit or other
obligation  or any  instrument to which Parent or any of its  Subsidiaries  is a
party or by which  any of the  assets  or  properties  of  Parent  or any of its
Subsidiaries is bound or any instrument or Law, or result in the creation of (or
impose  any  obligation  on Parent or any of its  Subsidiaries  to  create)  any
mortgage,  lien, charge,  security interest or other encumbrance upon any of the
properties or assets of Parent or any of its  Subsidiaries  pursuant to any such
term, except in the case of clause (b) where any of the foregoing,  individually
or in the aggregate,  does not and would not (i) have a Material  Adverse Effect
on Parent or (ii) prevent or materially  delay the performance of this Agreement
by Parent or Merger Sub.

                  6.9.  Taxes.  (a) Parent and its  Subsidiaries  have filed all
income Tax Returns and all material other United States federal,  state, county,
local and  foreign  Tax  Returns  required  to be filed by them.  Parent and its
Subsidiaries  have paid all  material  Taxes due,  other than Taxes  appropriate
reserves for which have been made in Parent's financial  statements (and, to the
extent material,  such reserves have been accurately  described to the Company).
There are no material  assessments  or  adjustments  that have been  asserted in
writing against  Parentor its  Subsidiaries  for any period for which Parent has
not made  appropriate  reserves in  Parent's  financial  statements  included in
Parent SEC Reports.

                  (b)  There  are no  material  claims  or  assessments  pending
against Parent or any of its Subsidiaries for any alleged deficiency in any Tax,
and Parent has not been notified in writing of any proposed  material Tax claims
or assessments  against Parent or any of its  Subsidiaries  (other than, in each
case,  claims or  assessments  for which adequate  reserves in Parent  financial
statements  have been  established or which are being contested in good faith or
are immaterial in amount).

                  (c) There  are no liens  for Taxes on the  assets of Parent or
any of its  Subsidiaries,  except for statutory  liens for current Taxes not yet
due and payable  (and except for liens which do not and would not,  individually
or in the aggregate, have a Material Adverse Effect on Parent).

                  6.10. Intellectual Property.  Parent and its Subsidiaries own,
or have the  defensible  right to use, the  Intellectual  Property used in their
respective businesses,  except where the failure to own or have the right to use
such Intellectual Property, individually or in the aggregate, does not and would
not have a Material Adverse Effect on Parent.

                                      -28-
<PAGE>


                  6.11. Reports and Financial  Statements.  (a) Parent has filed
all reports (including proxy statements) and registration statements required to
be filed  with the SEC since  January 1, 1996  (collectively,  the  "Parent  SEC
Reports"). Parent has previously furnished or made available to the Company true
and  complete  copies of all Parent SEC Reports  filed prior to the date hereof.
None of the Parent SEC Reports,  as of their  respective  dates,  contained  any
untrue  statement of material  fact or omitted to state a material fact required
to be stated  therein or necessary to make the statements  therein,  in light of
the  circumstances  under  which they were  made,  not  misleading.  Each of the
balance sheets  (including the related notes) included in the Parent SEC Reports
presents fairly, in all material respects,  the consolidated  financial position
of Parent and its Subsidiaries as of the respective dates thereof, and the other
related  statements  (including  the related  notes)  included in the Parent SEC
Reports present fairly, in all material respects,  the results of operations and
the  changes  in  financial  position  of Parent  and its  Subsidiaries  for the
respective  periods  or as of the  respective  dates set forth  therein,  all in
conformity with generally accepted accounting  principles  consistently  applied
during the periods involved,  except as otherwise noted therein and subject,  in
the case of the  unaudited  interim  financial  statements,  to normal  year-end
adjustments.  All of the  Parent  SEC  Reports,  as of their  respective  dates,
complied  as to form in all  material  respects  with  the  requirements  of the
Exchange  Act,  the  Securities  Act and the  applicable  rules and  regulations
thereunder.

                  (b)   Parent   and  its   Subsidiaries   have   not  made  any
misstatements  of fact,  or omitted to disclose  any fact,  to any  Governmental
Body, or taken or failed to take any action,  which  misstatements or omissions,
actions or failures to act,  individually or in the aggregate,  subject or would
subject any Parent  Permits  referred to in Section 6.4 to revocation or failure
to renew,  except where such revocation or failure to renew,  individually or in
the aggregate, does not and would not have a Material Adverse Effect on Parent.

                  (c)  Except  (i) as and to the extent  disclosed  or  reserved
against on the balance  sheet of Parent as of September 30, 1997 included in the
Parent SEC Reports,  or (ii) as incurred  after the date thereof in the ordinary
course of business  consistent  with prior  practice and not  prohibited by this
Agreement,  Parent does not have any  liabilities  or obligations of any nature,
absolute,  accrued,  contingent  or otherwise  and whether due or to become due,
that,  individually or in the aggregate,  have or would have a Material  Adverse
Effect on Parent.

                                      -29-
<PAGE>


                  (d) During the period  since  September  30,  1997,  except as
disclosed  in the Parent SEC Reports  filed prior to January 1, 1998,  there has
not been, and nothing has occurred that would have, a Material Adverse Effect on
Parent.

                  6.12.  Brokers and  Finders.  Except for the fees and expenses
payable to CS First Boston  Corporation  and Goldman Sachs & Co., which fees and
expenses will be paid by Parent,  Parent has not employed any investment banker,
broker,  finder,  consultant or intermediary in connection with the transactions
contemplated  by this  Agreement  which  would  be  entitled  to any  investment
banking,  brokerage,  finder's or similar fee or commission  in connection  with
this Agreement or the transactions contemplated hereby.

                  6.13.    S-4    Registration    Statement   and    Information
Statement/Prospectus. None of the information to be supplied by Parent or Merger
Sub  in  writing  for  inclusion  or  incorporation  by  reference  in  the  S-4
Registration Statement or the Information  Statement/Prospectus  will (a) in the
case of the S-4  Registration  Statement,  at the  time  it  becomes  effective,
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated  therein or necessary in order to make the statements
therein   not   misleading   or   (b)   in   the   case   of   the   Information
Statement/Prospectus,  at the time of the  mailing  thereof,  contain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated therein or necessary in order to make the statements therein, in light of
the  circumstances  under which they are made,  not  misleading.  If at any time
prior to the Effective  Time any event with respect to Parent,  its officers and
directors  or any of its  Subsidiaries  shall  occur  which  is  required  to be
described  in  an   amendment   of,  or  a   supplement   to,  the   Information
Statement/Prospectus or the S-4 Registration Statement,  Parent shall notify the
Company  thereof by  reference  to this  Section 6.13 and such event shall be so
described. Any such amendment or supplement shall be promptly filed with the SEC
and, as and to the extent required by law,  disseminated to the  stockholders of
the  Company,  and such  amendment  or  supplement  shall comply in all material
respects with all provisions of applicable Law. The S-4  Registration  Statement
will comply (with respect to Parent and Merger Sub and  information  provided in
writing  therefor by Parent or Merger Sub) as to form in all  material  respects
with the provisions of the Securities Act.

                  6.14. Ownership of Merger Sub; No Prior Activities;  Assets of
Merger Sub.

                  (a) Merger Sub was formed by Parent  solely for the purpose of
engaging in the transactions contemplated hereby.

                                      -30-
<PAGE>


                  (b) As of the date hereof and the Effective  Time, the capital
stock of Merger Sub is and will be owned 100% by Parent directly. Further, there
are not as of the date  hereof and there will not be at the  Effective  Time any
outstanding or authorized options,  warrants, calls, rights,  commitments or any
other agreements of any character to or by which Merger Sub is a party or may be
bound requiring it to issue,  transfer,  sell,  purchase,  redeem or acquire any
shares  of  capital  stock  or  any  securities  or  rights   convertible  into,
exchangeable  for, or  evidencing  the right to  subscribe  for or acquire,  any
shares of capital stock of Merger Sub.

                  (c)  As of  the  date  hereof  and  immediately  prior  to the
Effective  Time,  except for  obligations or liabilities  incurred in connection
with its incorporation or organization and the transactions  contemplated hereby
and by the  Voting  Agreement,  Merger  Sub has not and will not have  incurred,
directly or indirectly  through any Subsidiary or Affiliate,  any obligations or
liabilities  or  engaged  in any  business  or  activities  of any  type or kind
whatsoever or entered into any agreements or arrangements with any Person.
                  (d)  Parent  will take all  action  necessary  to ensure  that
Merger Sub at no time prior to the Effective Time owns any material assets other
than an  amount  of cash  necessary  to  incorporate  Merger  Sub and to pay the
expenses of the Merger attributable to Merger Sub if the Merger is consummated.

                  6.15.  Ownership of Company or ACC Stock.  Neither  Parent nor
any Subsidiary of Parent (excluding any employee benefit plan, or related trust,
of Parent or its  Subsidiaries)  owns or, to the knowledge of Parent,  has owned
within the last two years, any shares of the capital stock of either the Company
or ACC.  Between the date of this  Agreement  and the  Effective  Time,  neither
Parent nor any  Subsidiary of Parent  (excluding  any employee  benefit plan, or
related trust, of Parent or its Subsidiaries) will purchase or otherwise acquire
any shares of the capital stock of either the Company or ACC (except pursuant to
the terms of this Agreement or as provided in the ACC Agreement).


                                   ARTICLE VII

                       ADDITIONAL COVENANTS AND AGREEMENTS

                  7.1.  Conduct of Business of the Company.  Except as set forth
in Section 7.1 of the Company Disclosure  Statement,  as expressly  permitted by
this  Agreement,  as required by any change in  applicable  Law, or as otherwise
agreed by Parent in writing,  during the period from the date of this  Agreement
to the

                                      -31-
<PAGE>


Effective  Time, (i) the Company will,  and will cause each of its  Subsidiaries
to,  conduct  its  operations  according  to its  ordinary  course  of  business
consistent  with  past  practice,  and (ii) to the  extent  consistent  with the
foregoing,  the Company will, and will use all reasonable  efforts to cause each
of  its   Subsidiaries   to,  seek  to  preserve  intact  its  current  business
organizations, keep available the service of its current officers and employees,
and preserve its  relationships  with  customers,  suppliers  and others  having
business  dealings with it, with the objective  that their  goodwill and ongoing
businesses  shall be  unimpaired  at the Effective  Time.  Without  limiting the
generality of the foregoing, from and including the date hereof to the Effective
Time,  the Company  will not,  and will not permit any of its  Subsidiaries  to,
without the prior written  consent of Parent  (except to the extent set forth in
Section 7.1 of the Company Disclosure Statement):

                  (a) except for (i) Shares  issued upon  exercise of options or
         other rights  outstanding as of the date hereof under Employee Plans or
         Benefit Arrangements,  (ii) (A) options to purchase,  and awards of, no
         more than an aggregate of 300,000  Shares,  granted in connection  with
         new  hires  or  promotions,   directors'  retainers,  and  bonus  award
         programs,  in the  ordinary  course of  business  consistent  with past
         practice   under   currently   existing   Employee   Plans  or  Benefit
         Arrangements,  and (B) options to purchase no more than an aggregate of
         700,000  Shares issued  pursuant to or in accordance  with the terms of
         the ACC  Agreement  (which  options are included  within the  aggregate
         maximum number of Shares issuable  pursuant to the ACC Agreement as set
         forth in Section  5.6),  and the  issuance of Shares upon the  exercise
         thereof, (iii) Shares issued pursuant to the terms of the ACC Agreement
         (a copy of which, as in effect on the date hereof, has been provided to
         Parent), (iv) Shares issued in accordance with the terms of the Company
         Stock Purchase Plan as in effect on the date hereof,  and (v) shares of
         Class A Common Stock issued upon conversion of shares of Class B Common
         Stock  outstanding on the date hereof,  in accordance with the terms of
         the Company's  Certificate  of  Incorporation  as in effect on the date
         hereof, issue, deliver, sell, dispose of, pledge or otherwise encumber,
         or authorize or propose the issuance,  sale,  disposition  or pledge or
         other  encumbrance of (A) any additional shares of its capital stock of
         any  class  (including  the  Shares),   or  any  securities  or  rights
         convertible  into,   exchangeable  for,  or  evidencing  the  right  to
         subscribe for any shares of its capital stock, or any rights, warrants,
         options, calls, commitments or any other agreements of any character to
         purchase or acquire any shares of its capital  stock or any  securities
         or rights  convertible into,  exchangeable for, or evidencing the right
         to subscribe for,

                                      -32-
<PAGE>


         any shares of its capital stock, or (B) any other securities in respect
         of, in lieu of, or in substitution for, Shares  outstanding on the date
         hereof;

                  (b)  redeem,  purchase  or  otherwise  acquire,  or propose to
         redeem,   purchase  or  otherwise  acquire,   any  of  its  outstanding
         securities (including the Shares);

                  (c) except for  conversions  of shares of Class B Common Stock
         outstanding on the date hereof into shares of Class A Common Stock,  in
         accordance with the terms of the Company's Certificate of Incorporation
         as  in  effect  on  the  date  hereof,  split,  combine,  subdivide  or
         reclassify  any shares of its capital  stock or declare,  set aside for
         payment or pay any dividend, or make any other actual,  constructive or
         deemed  distribution  in respect of any shares of its capital  stock or
         otherwise make any payments to  stockholders  in their capacity as such
         (other  than  dividends  or  distributions  paid  by  any  Wholly-Owned
         Subsidiary of the Company);

                  (d) (i) grant any increases in the  compensation of any of its
         directors,  officers or  employees,  except in the  ordinary  course of
         business  consistent with past practice,  (ii) pay or award or agree to
         pay or award any  pension,  retirement  allowance,  or other  nonequity
         incentive awards, or other employee benefit, not required by any of the
         Employee  Plans  or  Benefit  Arrangements  to any  current  or  former
         director,  officer or  employees,  whether  past or present,  or to any
         other  Person,  except for  payments or awards that are in the ordinary
         course of business,  consistent  with past  practice,  and that are not
         material,  (iii) pay or award or agree to pay or award any stock option
         or equity  incentive  awards  except as expressly  permitted by Section
         7.1(a),  (iv)  enter  into any new or  amend  any  existing  employment
         agreement with any director, officer or employee, except for employment
         agreements  with new employees  entered into in the ordinary  course of
         business consistent with past practice and except for amendments in the
         ordinary course of business, consistent with past practice, that do not
         materially  increase  benefits or  payments,  (v) enter into any new or
         amend any  existing  severance  agreement  with any  current  or former
         director,  officer or employee,  except for agreements or amendments in
         the ordinary course of business, consistent with past practice, that do
         not provide for material  benefits,  or (vi) become obligated under any
         new Employee Plan or Benefit Arrangement, which was not in existence on
         the date hereof, or amend or exercise  discretion  pursuant to any such
         Employee Plan or Benefit  Arrangement  in existence on the date hereof,
         except for any

                                      -33-
<PAGE>


         such  amendment or exercise of  discretion  in the  ordinary  course of
         business,  consistent  with past  practice,  that does not  provide for
         material benefits;

                  (e)  adopt  a  plan  of  complete   or  partial   liquidation,
         dissolution, merger, consolidation, restructuring,  recapitalization or
         other  reorganization  of the  Company or any of its  Subsidiaries  not
         constituting an inactive  Subsidiary (other than the Merger,  and other
         than (i) with  respect to any  Subsidiary  of the  Company  such of the
         foregoing  as do not change the  beneficial  ownership  interest of the
         Company in such  Subsidiary  and (ii) with respect to the Company,  any
         such merger,  consolidation,  restructuring,  recapitalization or other
         reorganization that is used to effect an acquisition permitted pursuant
         to  Section  7.1(f) and which does not result in a change of control of
         the  Company or change the Shares  into a  different  number or kind of
         securities);

                  (f) make any acquisition, by means of merger, consolidation or
         otherwise,  of (i) any  direct or  indirect  ownership  interest  in or
         assets  comprising any business  enterprise or operation or (ii) except
         in the ordinary  course and consistent  with past  practice,  any other
         assets; provided,  however, that the Company may make such acquisitions
         for cash in an amount  not to  exceed  $10  million  in the case of any
         single  acquisition  or $100 million for all such  acquisitions  in the
         aggregate; provided further that such acquisitions do not and would not
         prevent  or  materially  delay  the  consummation  of the  Merger;  and
         provided  further that the foregoing shall not prevent the Company from
         exploring   on   a   preliminary   basis   and   conducting   diligence
         investigations   (including  having   discussions  with  any  potential
         acquisition  target) with  respect to any  potential  acquisition  that
         would  require   Parent's  consent   hereunder,   for  the  purpose  of
         determining  the   desirability  of  such  potential   acquisition  and
         developing the basis on which to seek Parent's consent,  so long as the
         Company does not submit any formal  proposal or  indication of interest
         to such  acquisition  target,  or make  any  binding  commitments  with
         respect  to such  potential  acquisition,  without  obtaining  Parent's
         consent;

                  (g) (i) dispose of any direct or indirect  ownership  interest
         in any CLEC  system or in any other  local  services  or access  system
         (including  any shares of capital stock of any  Subsidiary  holding any
         such  interest)  or any  controlling  interest  in any  other  material
         business  enterprise or operation,  (ii) make any other  disposition of
         any other direct or indirect ownership interest in or assets comprising
         any CLEC

                                      -34-
<PAGE>


         system or any other local  service or access  system or other  material
         business enterprise or operation (except for the replacement or upgrade
         of assets, or disposition of unnecessary assets, in the ordinary course
         and  consistent  with past  practice),  or (iii) except in the ordinary
         course and consistent with past practice, dispose of any other assets;

                  (h) adopt any amendments to its  Certificate of  Incorporation
         or  By-Laws  or  alter  through  merger,  liquidation,  reorganization,
         restructuring  or in any  other  fashion  the  corporate  structure  or
         ownership of any Subsidiary not constituting an inactive  Subsidiary of
         the Company;

                  (i) incur any indebtedness for borrowed money or guarantee any
         indebtedness of any other Person or make any loans, advances or capital
         contributions  to, or  investments  in, any other Person (other than to
         the Company or any Wholly-Owned Subsidiary of the Company), except that
         if the Company shall have complied with the  provisions of Section 7.14
         hereof  with  respect   thereto,   the  Company  may  incur  additional
         indebtedness  after the date hereof,  under existing credit  facilities
         (or any renewals  thereof) or in the high yield debt market,  resulting
         in  aggregate  net  proceeds  to  the  Company  from  such   additional
         indebtedness not exceeding $350 million;

                  (j)  engage  in  the  conduct  of  any  business   other  than
         telecommunications and related businesses;

                  (k)  enter  into any  agreement  or  exercise  any  discretion
         providing for  acceleration  of payment or performance as a result of a
         change of control of the Company or its Subsidiaries;

                  (l) enter into any contracts,  arrangements or  understandings
         requiring  in the  aggregate  the  purchase  of  equipment,  materials,
         supplies or services in excess of $35 million more than the amounts set
         forth for capital  expenditures  in the Company's  1998  operating plan
         approved by the Company's  Board of Directors prior to the date hereof,
         a copy of which has been provided by the Company to Parent;

                  (m) enter into or amend or waive any right under any agreement
         with any  Affiliates of the Company  (other than its  Subsidiaries)  or
         with any Cable  Stockholder or any Affiliate of any Cable  Stockholder,
         other than any of the  foregoing as may be done in the ordinary  course
         of business and that is not material, individually or in the aggregate,
         to the

                                      -35-
<PAGE>


         Company and its Subsidiaries;

                  (n) settle or  compromise  any material  litigation  or waive,
         release or assign any material rights or claims, except in the ordinary
         course of business consistent with past practice;

                  (o) amend, modify, supplement, or waive any right or condition
         under,  the ACC  Agreement or consent to ACC doing any of the foregoing
         under the US Wats  Agreement,  except,  in either case, for amendments,
         modifications,  supplements  or waivers which are not adverse to Parent
         or the  Company in any  material  respect and which in any event do not
         (i) increase the consideration payable per share or in the aggregate to
         shareholders  of ACC under the ACC  Agreement  or US Wats  under the US
         Wats Agreement, (ii) otherwise increase the maximum aggregate number of
         Shares that may be issuable  under the ACC  Agreement,  or (iii) extend
         the  "drop-dead"  date under either such agreement  beyond November 26,
         1998; or

                  (p) authorize, recommend or propose (other than to Parent), or
         announce an  intention  to do any of the  foregoing,  or enter into any
         contract,  agreement,  commitment  or  arrangement  to do  any  of  the
         foregoing.

                  7.2.  Other  Transactions.  Prior to the Effective  Time,  the
Company and its Subsidiaries  shall not, and shall use all reasonable efforts to
cause  their  respective  officers,  employees,   representatives,   agents  and
Affiliates  not to,  directly  or  indirectly,  encourage,  solicit or engage in
discussions or negotiations with any third party (other than Parent)  concerning
any merger,  consolidation,  share exchange or similar transaction involving the
Company or any of its  Subsidiaries,  or any  purchase  of all or a  significant
portion  of the  assets  of or  equity  interest  in the  Company  or any of its
Subsidiaries,  or any other  transaction  that would  involve  the  transfer  or
potential  transfer  of control of the  Company or any of its  Subsidiaries  (an
"Acquisition Proposal"), or provide any confidential information relating to the
Company or any of its  Subsidiaries in connection with or in contemplation of an
Acquisition  Proposal,  other than the  transactions  contemplated  hereby.  The
Company  shall  immediately  request  that  any  Person  that has  received  any
confidential  information  involving the Company or any of its  Subsidiaries  in
connection  with an  Acquisition  Proposal  return  all  copies  thereof  to the
Company,  and  the  Company  and  its  Subsidiaries  shall,  and  shall  use all
reasonable   efforts   to   cause   their   respective   officers,    employees,
representatives,   agents  and  Affiliates  to,  terminate  all  discussions  or
negotiations  with any Person  with  respect to any  Acquisition  Proposal.  The
Company


                                      -36-
<PAGE>


will notify Parent  promptly of any written  inquiries or proposals with respect
to any such  transaction  that are  received  by,  or any such  negotiations  or
discussions  that are sought to be  initiated  with,  the  Company or any of its
Subsidiaries  after the date hereof,  will advise  Parent of the identity of any
Person making any such  Acquisition  Proposal and of the material terms thereof,
and shall keep Parent  apprised  with respect to all material  matters  relating
thereto.  Nothing  contained in this  Agreement  shall  prohibit or restrict the
Company's  Board of  Directors  from  taking  and  disclosing  to the  Company's
stockholders  a position  in  accordance  with Rules  14d-9 and 14e-2  under the
Exchange  Act with  respect to a tender  offer or an  exchange  offer for Shares
commenced  by a third  party,  provided  that Parent  shall be given  reasonable
advance notice thereof,  and provided,  further,  that nothing in this Agreement
shall be deemed to relieve the Cable  Stockholders  from their obligations under
the Voting Agreement.

                  7.3.  Stockholder   Approval.   (a)  Pursuant  to  the  Voting
Agreement,  each of the Cable Stockholders has agreed to execute, or cause to be
executed,  immediately  following  execution  and  delivery of this  Agreement a
written consent with respect to all Shares owned by it or which it has the right
to vote or  consent in favor of  approval  and  adoption  of the Merger and this
Agreement (the "Stockholders Consent"). Notwithstanding the foregoing, if Parent
so requests,  the Company  will take all action  necessary  in  accordance  with
applicable  law and its  Certificate of  Incorporation  and By-Laws to convene a
meeting of its  stockholders to consider and vote upon the approval and adoption
of this Agreement and the transactions  contemplated  hereby, and to submit this
Agreement to the stockholders of the Company for their approval, or to solicit a
further written consent, in lieu of a stockholders' meeting, of its stockholders
approving and adopting this Agreement and the transactions  contemplated hereby,
and the  Company  and its Board of  Directors  shall take all lawful  reasonable
action to solicit, and use all reasonable efforts to obtain, such approval.

                  (b)  Notwithstanding  the provisions of Section 7.3(a),  after
the adoption of this Agreement by the  stockholders of the Company,  without the
affirmative  approval,  by vote or  written  consent,  of the  holders of Shares
representing a majority of the votes that may be cast by the holders of all then
outstanding  Shares,  the Company will not (i) enter into any  amendment to this
Agreement  that would  alter or change any of the terms and  conditions  of this
Agreement if such  alteration  or change would  adversely  affect the holders of
Shares, (ii) waive any condition set forth in Section 8.1 or Section 8.3 if such
waiver  would  materially  adversely  affect  the  holders  of  Shares  or (iii)
consummate the Merger after a time at which the Company would be

                                      -37-
<PAGE>


entitled to terminate the Agreement  pursuant to Section 9.2(a)  (without regard
to any amendment of such Section not approved pursuant to this Section 7.3(b)).

                  (c) Parent,  as the sole  stockholder  of Merger  Sub,  hereby
consents to the  adoption of this  Agreement  by Merger Sub and agrees that such
consent shall be treated for all purposes as a vote duly adopted at a meeting of
the stockholders of Merger Sub held for this purpose.

                  7.4.  Registration  Statement.  Parent  will,  as  promptly as
practicable,  prepare and file with the SEC a registration statement on Form S-4
(the    "S-4    Registration    Statement"),     containing    an    information
statement/prospectus,  in connection with the registration  under the Securities
Act of the Parent Common Shares  issuable upon  conversion of the Shares and the
other  transactions  contemplated  hereby.  The  Company  will,  as  promptly as
practicable, prepare and file with the SEC an information statement that will be
the same  information  statement/prospectus  contained  in the S-4  Registration
Statement (such  information  statement/prospectus  together with any amendments
thereof or  supplements  thereto,  in the form or forms mailed to the  Company's
stockholders,  "Information Statement/Prospectus").  Parent and the Company will
use all reasonable efforts to have or cause the S-4 Registration Statement to be
declared  effective  as  promptly as  practicable,  and also will take any other
action  reasonably  required to be taken under federal or state securities laws,
and the  Company  will  use all  reasonable  efforts  to cause  the  Information
Statement/Prospectus to be mailed to stockholders of the Company at the earliest
practicable  date. If, pursuant to Section 7.3, Parent requests a meeting of the
stockholders of the Company, then the S-4 Registration Statement shall include a
proxy statement/prospectus  meeting the requirements of the Exchange Act and all
references  herein to the  Information  Statement/Prospectus  shall be deemed to
refer to such proxy statement/prospectus.  Each party hereto agrees to cooperate
reasonably  with each other party in connection  with the preparation and filing
of the S-4 Registration Statement and Information  Statement/Prospectus,  and of
the  registration  statement  and the proxy  statement/prospectus  to be used in
connection with the ACC Agreement,  including providing information to the other
party  with  respect  to  itself as may be  reasonably  required  in  connection
therewith.

                  7.5.  Reasonable  Efforts.  (a) Subject to Section 7.5(c), the
Company and Parent shall,  and shall use all  reasonable  efforts to cause their
respective  Subsidiaries,  as applicable,  to: (i) promptly make all filings and
seek to  obtain  all  Authorizations  required  under all  applicable  Laws with
respect to the Merger and the other transactions contemplated

                                      -38-
<PAGE>


hereby and will  reasonably  consult and cooperate  with each other with respect
thereto;  (ii) not take any action (including effecting or agreeing to effect or
announcing  an  intention  or  proposal  to effect,  any  acquisition,  business
combination or other  transaction) which would impair the ability of the parties
to consummate the Merger  (regardless of whether such action would  otherwise be
permitted or not prohibited hereunder);  and (iii) use all reasonable efforts to
promptly  take,  or cause to be taken,  all other actions and do, or cause to be
done,  all  other  things  necessary,  proper  or  appropriate  to  satisfy  the
conditions set forth in Article VIII (unless  waived) and to consummate and make
effective  the  transactions  contemplated  by this  Agreement  on the terms and
conditions set forth herein (including seeking to remove promptly any injunction
or other legal barrier that may prevent such consummation);  provided,  however,
that nothing in this  sentence  shall  prohibit the Company from  effecting  the
transactions  contemplated  by the ACC Agreement in  accordance  with its terms.
Each party shall promptly  notify the other party of any  communication  to that
party from any Governmental Body in connection with any required filing with, or
approval or review by, such  Governmental Body in connection with the Merger and
permit the other party to review in advance any  proposed  communication  to any
Governmental  Body in such connection to the extent permitted by applicable law.
Notwithstanding  the  foregoing,  in  connection  with any filing or  submission
required  or action to be taken by either the  Company or Parent or any of their
respective  Subsidiaries  to  effect  the  Merger  and to  consummate  the other
transactions  contemplated  hereby,  (A)  neither  the  Company  nor  any of its
Subsidiaries  shall,  without  Parent's  prior  written  consent,  commit to any
divestiture or hold separate or similar  transaction and each of the Company and
its  Subsidiaries  shall commit to, and shall use reasonable  efforts to effect,
such  thereof  (which may, at the  Company's  option,  be  conditioned  upon and
effective as of the  Effective  Time) as Parent shall  request,  and (B) neither
Parent nor any of its Subsidiaries  shall be required to divest or hold separate
or  otherwise  take (or refrain  from taking) or commit to take (or refrain from
taking) any action  that  limits its  freedom of action with  respect to, or its
ability  to  retain,  the  Company or any of its  Subsidiaries  or any  material
portion  of the  assets  of the  Company  and  its  Subsidiaries,  or any of the
business,  product lines or assets of Parent or any of its Subsidiaries,  if any
of the  foregoing,  individually  or in the  aggregate,  would  have a  Material
Adverse Effect on the Company (or an effect on Parent and its Subsidiaries that,
were such effect applied to the Company and its Subsidiaries, would constitute a
Material Adverse Effect on the Company).

                  (b)  The  Company  and  its   Subsidiaries   shall  use  their
reasonable best efforts (i) not to take any action (regardless of

                                      -39-
<PAGE>


whether such action would  otherwise be permitted or not  prohibited  hereunder)
that, to the Company's  knowledge  based on  consultation  with its  independent
accountants (which consultation shall be required before the Company may use its
lack  of  knowledge  as a  defense),  prevents  or  would  prevent  Parent  from
accounting  for the Merger as a pooling of interests and (ii) to take any action
necessary to cure any action  previously  taken by or any condition  relating to
the Company or any of its Subsidiaries that, to the Company's knowledge based on
consultation  with its  independent  accountants  (which  consultation  shall be
required  before  the  Company  may use its  lack of  knowledge  as a  defense),
prevents or would prevent Parent from  accounting for the Merger as a pooling of
interests, in each case unless Parent shall have irrevocably and unconditionally
waived in writing the condition set forth in Section 8.2(e).

                  (c)   Notwithstanding   anything  to  the   contrary  in  this
Agreement,  nothing in this Agreement  shall prevent or restrict  Parent and its
Subsidiaries from engaging in any merger,  acquisition,  business combination or
other transaction (whether or not Parent is the surviving corporation); provided
that such merger,  acquisition,  business combination or other transaction would
not (i)  prevent,  or delay  beyond  March 31,  1999,  the  ability of Parent to
consummate the Merger or (ii) cause the Merger,  or the merger  contemplated  by
the ACC Agreement, to fail to qualify as a tax-free reorganization.

                  7.6.  Access to  Information.  Subject to  currently  existing
contractual and legal restrictions  applicable to the Company (which the Company
represents  and warrants are not  material),  and upon  reasonable  notice,  the
Company shall (and shall cause each of its  Subsidiaries to) afford to officers,
employees,  counsel,  accountants and other authorized representatives of Parent
("Parent  Representatives")  reasonable  access,  during normal  business  hours
throughout the period prior to the Effective Time, to its properties,  books and
records (including, subject to execution of appropriate access letters, the work
papers of independent  accountants),  such access not to unreasonably  interfere
with the Company's business or operations,  and, during such period,  shall (and
shall  cause  each of its  Subsidiaries  to)  furnish  promptly  to such  Parent
Representatives  all  information   concerning  its  business,   properties  and
personnel  as may  reasonably  be  requested,  provided  that  no  investigation
pursuant  to this  Section  7.6 shall  affect or be deemed to modify  any of the
respective representations or warranties made by the Company. Parent agrees that
it will  not,  and  will  cause  the  Parent  Representatives  not  to,  use any
information  obtained  pursuant to this Section 7.6 for any purpose unrelated to
the consummation of the transactions contemplated by this Agreement.  Subject to
the requirements of law, Parent will keep confidential, and will

                                      -40-
<PAGE>


cause the Parent  Representatives  to keep  confidential,  all  information  and
documents obtained pursuant to this Section 7.6 except as otherwise consented to
by the Company;  provided,  however,  that Parent  shall not be  precluded  from
making any  disclosure  which it deems  required by law in  connection  with the
Merger. In the event Parent is required to disclose any information or documents
pursuant to the immediately preceding sentence, Parent shall promptly give prior
written notice of such  disclosure that is proposed to be made to the Company so
that  Parent and the Company can work  together to limit the  disclosure  to the
greatest extent  possible and, in the event that Parent is legally  compelled to
disclose any information, to seek a protective order or other appropriate remedy
or both. Upon any termination of this Agreement, Parent will collect and deliver
to the Company all documents  obtained pursuant to this Section 7.6 or otherwise
from the  Company or its  Subsidiaries  by Parent or the Parent  Representatives
then in their possession and any copies thereof.  All requests for access to the
Company  and  their  Subsidiaries  pursuant  to this  Section  7.6 shall be made
through the  representatives  of the Company named in Section 7.6 of the Company
Disclosure Statement.

                  7.7.  Indemnification of Directors and Officers.  (a) From and
after the Effective Time, Parent and the Surviving Corporation shall jointly and
severally  indemnify,  defend and hold harmless the present and former officers,
directors  and  employees  of the Company and any of its  Subsidiaries,  and any
Person who is or was  serving  at the  request  of the  Company  as an  officer,
director or employee or agent of another Person,  against all losses,  expenses,
claims,  damages or liabilities arising out of actions or omissions occurring on
or prior to the Effective Time (including the transactions  contemplated by this
Agreement) to the fullest extent permitted under applicable Law (and shall also,
subject to Section  7.7(b),  advance  expenses as incurred to the fullest extent
permitted under  applicable  Law,  provided that the Person to whom expenses are
advanced  provides an  undertaking  to repay such  advances if it is  ultimately
determined  that such  Person is not  entitled  to  indemnification);  provided,
however,  that such  indemnification  shall be  provided  only to the extent any
directors'  and  officers'  liability  insurance  policy of the  Company  or its
Subsidiaries  does not  provide  coverage  and actual  payment  thereunder  with
respect to the  matters  that  would  otherwise  be  subject to  indemnification
hereunder (it being understood that the Surviving  Corporation shall, subject to
Section  7.7(b),  advance  expenses  on a  current  basis  as  provided  in this
paragraph  (a)  notwithstanding  such  insurance  coverage  to the  extent  that
payments  thereunder  have  not yet  been  made,  in which  case  Parent  or the
Surviving  Corporation,  as the case may be,  shall be entitled to  repayment of
such advances from the proceeds of such insurance  coverage).  Parent and Merger
Sub agree that

                                      -41-
<PAGE>


all rights to  indemnification,  including  provisions  relating  to advances of
expenses incurred in defense of any action,  suit or proceeding,  whether civil,
criminal,  administrative or investigative (each, a "Claim"),  existing in favor
of the present or former directors, officers, employees,  fiduciaries and agents
of the Company or any of its Subsidiaries,  and any Person who is or was serving
at the request of the  Company as an  officer,  director or employee or agent of
another  Person  (collectively,  the  "Indemnified  Parties") as provided in the
Company's   Certificate  of  Incorporation  or  By-Laws  or  pursuant  to  other
agreements,  or certificates of incorporation or by-laws or similar documents of
any of the  Company's  Subsidiaries,  as in effect as of the date  hereof,  with
respect to matters  occurring  through the  Effective  Time,  shall  survive the
Merger and shall continue in full force and effect for a period of not less than
six  years  from the  Effective  Time;  provided,  however,  that all  rights to
indemnification in respect of any Claim asserted,  made or commenced within such
period shall continue until the final  disposition of such Claim.  The Surviving
Corporation  shall  maintain  in effect  for not less  than six years  after the
Effective  Time the  current  policies of  directors'  and  officers'  liability
insurance maintained by the Company and the Company's  Subsidiaries with respect
to matters occurring prior to the Effective Time;  provided,  however,  that (i)
the Surviving  Corporation may substitute therefor policies of at least the same
coverage  containing terms and conditions which are no less  advantageous to the
Indemnified  Parties with an insurance  company or companies,  the claims paying
ability of which is substantially equivalent to the claims paying ability of the
insurance company or companies  providing such insurance  coverage for directors
and officers of Parent and (ii) the Surviving  Corporation shall not be required
to pay an annual  premium for such  insurance  in excess of three times the last
annual premium paid prior to the date hereof, but in such case shall purchase as
much coverage as possible for such amount.

                  (b) In the  event  that any  Claim  relating  hereto or to the
transactions  contemplated by this Agreement is commenced,  before the Effective
Time, the parties hereto agree to cooperate and use their respective  reasonable
efforts to vigorously defend against and respond thereto.  Any Indemnified Party
wishing  to claim  indemnification  under  paragraph  (a) of Section  7.7,  upon
learning of any such claim,  action,  suit,  proceeding or investigation,  shall
promptly notify Parent thereof,  whereupon  Parent or the Surviving  Corporation
shall have the right,  from and after the Effective  Time, to assume and control
the defense thereof, and upon such assumption,  the Surviving  Corporation shall
not be liable  to such  Indemnified  Parties  for any  legal  expenses  of other
counsel or any other expenses  subsequently incurred by such Indemnified Parties
in connection with the defense thereof.  The Surviving  Corporation shall not be
liable for any settlement

                                      -42-
<PAGE>


effected without its prior written consent.

                  (c) This  Section 7.7 is  intended to benefit the  Indemnified
Parties and shall be binding on all successors and assigns of Parent, Merger Sub
and the Surviving Corporation.

                  7.8.  Registration  and Listing of Parent Common  Shares.  (a)
Parent will use all  reasonable  efforts to register the Parent Common Shares to
be issued pursuant to this Agreement, and upon exercise of stock options granted
to  employees  of  the  Company  and  its  Subsidiaries,  under  the  applicable
provisions of the  Securities Act and, if required,  under any applicable  state
securities laws.

                  (b) Parent will use all reasonable efforts to cause the Parent
Common Shares to be issued pursuant to this Agreement and upon exercise of stock
options granted to employees of the Company and its  Subsidiaries,  to be listed
for trading on the NYSE.

                  7.9.  Affiliates of Parent and the Company.  Concurrently with
the  execution  of this  Agreement,  each of the  directors  of the  Company has
executed an agreement to the effect set forth in this Section 7.9.  Prior to the
Effective  Time,  the Company shall deliver to Parent a letter  identifying  all
other Persons who, to the Company's knowledge,  at the time of the execution and
delivery of the Stockholders  Consent or at the Effective Time, may be deemed to
be "affiliates" of the Company for purposes of Rule 145 under the Securities Act
or who may  otherwise be deemed to be  Affiliates  of the Company (the "Rule 145
Affiliates").  The Company shall use all reasonable efforts to cause each Person
who is  identified  as a Rule 145 Affiliate in such list to deliver to Parent on
or prior to the 30th day prior to the Effective  Time, a written  agreement,  in
the form attached hereto as Exhibit A, that such Rule 145 Affiliate will not (a)
sell,  pledge,  transfer or otherwise dispose of any Parent Common Shares issued
to such  Rule 145  Affiliate  pursuant  to the  Merger,  except  pursuant  to an
effective  registration  statement  or in  compliance  with  Rule 145  under the
Securities  Act  or an  exemption  from  the  registration  requirements  of the
Securities Act, or (b) sell, pledge,  transfer or otherwise dispose of, or hedge
or otherwise  reduce its risk with  respect to, any Shares or any Parent  Common
Shares,  in each case from the 30th day prior to the Effective  Time to the time
that results covering at least 30 days of combined operations of the Company and
Parent have been published by Parent in the form of a quarterly earnings report,
an effective  registration  statement filed with the SEC, a report to the SEC on
Form  10-K,  10-Q or 8-K,  or any  other  public  filing or  announcement  which
includes the combined results of operations.


                                      -43-
<PAGE>


                  7.10.  Tax  Matters.   Each  of  the  parties  shall  use  all
reasonable  efforts  to  cause  each of (i)  the  Merger  and  (ii)  the  merger
contemplated  by the ACC  Agreement to  constitute  a tax-free  "reorganization"
under Section  368(a) of the Code.  None of the parties will  knowingly take any
action,  and  none  of the  parties  will  permit  any of  its  Subsidiaries  or
Affiliates  knowingly to take any action, that would cause either (i) the Merger
or (ii) the  merger  contemplated  by the ACC  Agreement  to fail to  qualify as
tax-free  reorganizations  under Section 368(a) of the Code. Each of the parties
shall use all reasonable  efforts to permit Wachtell,  Lipton,  Rosen & Katz and
Dow,  Lohnes &  Albertson,  PLLC to issue  their  opinions  provided in Sections
8.2(d) and 8.3(d), respectively,  and to permit Dow, Lohnes & Albertson, PLLC to
issue its opinion pursuant to Section 6.3.7 of the ACC Agreement as in effect on
the date  hereof.  If so requested  by  Wachtell,  Lipton,  Rosen & Katz or Dow,
Lohnes &  Albertson,  PLLC,  the Company  shall  deliver to each such  counsel a
certificate  signed by an officer of the Company to the effect  that,  except to
the extent set forth and identified in such certificate, to the knowledge of the
Company,  there is no plan or intention by the  stockholders  of the Company who
own 5% or more of the issued and  outstanding  Shares,  and, to the knowledge of
the Company,  there is no present plan or intention on the part of the remaining
stockholders of the Company to sell,  exchange,  or otherwise  dispose of Parent
Common Shares received in the Merger (it being  understood that Shares exchanged
for cash in lieu of fractional Parent Common Shares and Shares and Parent Common
Shares  held by  stockholders  of the Company and  otherwise  sold,  redeemed or
disposed of prior or  subsequent to the Merger will be considered in making this
representation).  Each party  agrees to report the Merger on all tax returns and
other filings as a tax-free reorganization under Section 368(a) of the Code.

                  7.11.  New York Real  Property  Transfer  Tax.  Any  liability
arising out of New York State and/or New York City Real Property Transfer Taxes,
with respect to interests in real property owned, directly or indirectly, by the
Company  immediately  prior to the Merger, if applicable and due with respect to
the Merger, shall be borne by the Company and expressly shall not be a liability
of the stockholders of the Company.

                  7.12. Employee Matters.  As soon as practicable  following the
Closing (using reasonable best efforts to accomplish the transition by the later
of January 1, 1999 or 90 days after  Closing),  all employees of the Company and
its  Subsidiaries who remain employed by the Company or its Subsidiaries (or who
become  employed by Parent or its  Subsidiaries)  immediately  after the Closing
("Company Employees"), and their dependents and beneficiaries if

                                      -44-
<PAGE>


applicable,  shall be  eligible  to  participate  in the  employee  benefit  and
compensation arrangements, plans, programs and practices of the Parent generally
applicable  to other  similarly  situated  employees  of the Parent (the "Parent
Plans").  Company  Employees shall be credited with all service with the Company
and its Subsidiaries and their predecessors prior to the Closing for purposes of
determining  eligibility  to  participate,  vesting and benefit  accrual (to the
extent  applicable)  in the Parent  Plans,  but not for (i)  purposes of benefit
accruals  under  any of the  Parent's  defined  benefit  pension  plans,  or the
schedule of benefits  under  Parent's  severance pay and  short-term  disability
plans and  programs,  (ii)  eligibility  to  receive  post-retirement  ancillary
benefits  (consisting  at this time of  medical,  dental,  death  and  telephone
concession  benefits)  or (iii)  calculating  Parent  service  for  purposes  of
"bridging"  prior Parent  service under Parent  Plans.  In the event any Company
Employee's   employment  with  Parent  or  its   Subsidiaries  is  involuntarily
terminated (other than for cause) prior to the first anniversary of the Closing,
such Company Employee shall receive a severance benefit calculated in accordance
with  the  schedule  of  benefits  set  forth  in  Section  7.12 of the  Company
Disclosure  Statement,  taking into account all years of such Company Employee's
service,  including  service  with the  Company  or its  Subsidiaries  and their
predecessors  prior to the Closing.  Thereafter,  Company  Employees  who remain
employed by Parent or its  Subsidiaries  shall be eligible to participate in the
applicable  Parent  severance pay plan, and benefits  payable under the terms of
such plan shall be based on such Company  Employee's  actual service with Parent
or its Subsidiaries from and after Closing.

                  7.13.  Certain  Covenants  of  Parent.   Except  as  otherwise
permitted  in this  Agreement,  prior to the  Effective  Time  Parent  will not,
without the prior  written  consent of the Company,  adopt a plan of complete or
partial liquidation or dissolution, or authorize, recommend, propose or announce
an  intention  to do so or enter into any  contract,  agreement,  commitment  or
arrangement to do so.

                  7.14. Right of First Offer. Whenever the Company or any of its
Subsidiaries  intends to incur any  indebtedness for borrowed money as permitted
pursuant to Section 7.1(i) hereof, the Company shall notify Parent in writing of
the expected  terms,  conditions,  amount,  uses,  lenders or other  alternative
financing  sources  and  other  material   provisions   thereof  (the  "Proposed
Financing")  and shall provide Parent with the opportunity to provide all of the
Proposed  Financing  on the same terms and  conditions.  Parent shall notify the
Company of its  determination  to provide all of the Proposed  Financing on such
terms and  conditions  within seven business days of receipt of such notice from
the Company. If Parent so elects to provide all of the

                                      -45-
<PAGE>


Proposed Financing,  the Company shall not enter into any alternative  financing
arrangements  with respect  thereto.  If Parent does not elect to provide all of
the  Proposed  Financing,  the Company and its  Subsidiaries  may enter into the
Proposed  Financing with any Person other than Parent on terms and conditions no
less favorable in any material respect to the Company and its Subsidiaries  than
those offered to Parent  pursuant to this Section 7.14.  Nothing in this Section
7.14  shall  require  Parent to  accept  any offer or to  provide  any  Proposed
Financing to the Company.


                                  ARTICLE VIII

                                   CONDITIONS

                  8.1.  Conditions to Each Party's  Obligations.  The respective
obligations of each party to consummate the  transactions  contemplated  by this
Agreement are subject to the  fulfillment  at or prior to the Effective  Time of
each of the following conditions,  any or all of which may be waived in whole or
in part by the party  being  benefitted  thereby,  to the  extent  permitted  by
applicable Law:

                  (a) Stockholder Approval.  This Agreement and the transactions
         contemplated  hereby  shall  have been duly  approved  and  adopted  or
         ratified  by  the  requisite  holders  of  Shares  in  accordance  with
         applicable Law and the Certificate of Incorporation  and By-Laws of the
         Company and the  provisions  of Section  7.3(b) hereof (it being agreed
         that the condition set forth in this Section 8.1(a) shall not be waived
         by the parties);

                  (b) HSR Act; FCC. Any waiting period  applicable to the Merger
         under the HSR Act shall have expired or early termination thereof shall
         have been granted, and the FCC Consent shall have been granted, in each
         case without  limitation,  restriction  or condition  that has or would
         have a Material  Adverse  Effect on the Company (or an effect on Parent
         and its Subsidiaries  that, were such effect applied to the Company and
         its  Subsidiaries,  would  constitute a Material  Adverse Effect on the
         Company).

                  (c) No Injunction.  There shall not be in effect any judgment,
         writ, order,  injunction or decree of any court or Governmental Body of
         competent jurisdiction,  restraining, enjoining or otherwise preventing
         consummation  of the  transactions  contemplated  by this  Agreement or
         permitting  such   consummation   only  subject  to  any  condition  or
         restriction that has or would have a Material Adverse Effect on the

                                      -46-
<PAGE>


         Company (or an effect on Parent and its  Subsidiaries  that,  were such
         effect applied to the Company and its Subsidiaries,  would constitute a
         Material Adverse Effect on the Company).

                  (d) Registration  Statement.  The S-4  Registration  Statement
         shall  have  been  declared  effective  and shall be  effective  at the
         Effective Time, and no stop order suspending  effectiveness  shall have
         been issued, no action, suit, proceeding or investigation by the SEC to
         suspend the  effectiveness  thereof  shall have been  initiated  and be
         continuing,  and all necessary approvals under state securities laws or
         the  Securities Act or Exchange Act relating to the issuance or trading
         of the Parent Common Shares shall have been received.

                  (e) Listing of Parent Common Shares on NYSE. The Parent Common
         Shares  required to be issued  hereunder  shall have been  approved for
         listing on the NYSE, subject only to official notice of issuance.

                  (f) Information Statement. At least twenty business days shall
         have elapsed from the mailing of the  Information  Statement/Prospectus
         to the stockholders of the Company.

                  8.2.  Conditions to  Obligations of Parent and Merger Sub. The
respective  obligations of Parent and Merger Sub to consummate the  transactions
contemplated by this Agreement are subject to the fulfillment at or prior to the
Effective  Time of each of the following  additional  conditions,  any or all of
which may be waived in whole or part by Parent and Merger  Sub,  as the case may
be, to the extent permitted by applicable Law:

                  (a)  Representations  and Warranties True. The representations
         and warranties of the Company contained herein or otherwise required to
         be made after the date hereof in a writing expressly referred to herein
         by or on behalf  of the  Company  pursuant  to this  Agreement,  to the
         extent qualified by materiality or Material Adverse Effect,  shall have
         been true and, to the extent not qualified by  materiality  or Material
         Adverse Effect, shall have been true in all material respects,  in each
         case when made and on and as of the Closing  Date as though made on and
         as of the Closing Date (except for  representations and warranties made
         as of a specified  date,  which need be true,  or true in all  material
         respects, as the case may be, only as of the specified date).

                  (b) Performance.  The Company shall have performed or complied
         in all material respects with all agreements and

                                      -47-
<PAGE>


         conditions  contained  herein required to be performed or complied with
         by it prior to or at the time of the Closing.

                  (c) Compliance  Certificate.  The Company shall have delivered
         to Parent a certificate,  dated the date of the Closing,  signed by the
         President or any Vice  President  of the Company (but without  personal
         liability thereto),  certifying as to the fulfillment of the conditions
         specified in Sections 8.2(a) and 8.2(b).

                  (d) Tax  Opinion.  Parent  shall have  received  an opinion of
         Wachtell, Lipton, Rosen & Katz, dated the Effective Time, to the effect
         that (i) the Merger will be treated for federal  income tax purposes as
         a reorganization within the meaning of Section 368(a) of the Code; (ii)
         each of  Parent,  Merger  Sub and the  Company  will be a party  to the
         reorganization  within the meaning of Section 368(b) of the Code; (iii)
         no gain or loss will be recognized by the Company, Parent or Merger Sub
         as a result of the Merger;  and (iv) no gain or loss will be recognized
         by a stockholder  of the Company as a result of the Merger with respect
         to the Shares converted solely into Parent Common Shares.  In rendering
         such opinion,  Wachtell, Lipton, Rosen & Katz may receive and rely upon
         representations  contained  in  certificates  of the  Company,  Parent,
         Merger Sub, the Cable Stockholders and others, in each case in form and
         substance reasonably acceptable to Wachtell, Lipton, Rosen & Katz.

                  (e) Pooling Covenant.  The Company and its Subsidiaries  shall
         have complied with the covenant contained in Secion 7.5(b) hereof.

                  (f) Other Authorizations. All Authorizations (other than those
         specified in Section  8.1(b)  hereof)  required in connection  with the
         execution  and delivery of this  Agreement and the  performance  of the
         obligations  hereunder  shall have been made or  obtained,  without any
         limitation,  restriction or condition that has or would have a Material
         Adverse  Effect  on the  Company  (or  an  effect  on  Parent  and  its
         Subsidiaries  that,  were such  effect  applied to the  Company and its
         Subsidiaries,  would  constitute  a  Material  Adverse  Effect  on  the
         Company),  except for such  Authorizations the failure of which to have
         been made or obtained  does not and would not,  individually  or in the
         aggregate,  have a Material Adverse Effect on the Company (or an effect
         on Parent and its  Subsidiaries  that,  were such effect applied to the
         Company  and its  Subsidiaries,  would  constitute  a Material  Adverse
         Effect on the Company).

                  (g) Employment  Agreements.  Each of the employment

                                      -48-
<PAGE>


         agreements  between  the  Company  and  each  employee  of the  Company
         identified in Exhibit B hereto (which  employment  agreements are being
         executed concurrently with the execution of this Agreement) shall be in
         full  force  and  effect,  and each  such  employee  shall be  employed
         thereunder,  unless  the  failure  of  such  employee  to  be  employed
         thereunder results from the death or disability of such employee.

                  (h)  Consents  Under  Facilities   Agreements.   All  required
         authorizations,  consents or approvals of any third parties (other than
         a Governmental Body) with respect to any contracts,  leases, agreements
         or  understandings  between the Company and/or any of its Subsidiaries,
         on the one hand,  and any other Person,  on the other,  relating to the
         use of or access to the  facilities  of such  Person for the purpose of
         providing  telecommunications services, the failure to obtain which has
         or would have,  individually  or in the aggregate,  a Material  Adverse
         Effect on the Company, shall have been obtained.

                  (i)  Voting  Agreement.  There  shall not have been a material
         breach of the Voting Agreement by any of the Cable Stockholders.

                  (j) Other Transactions.  The transactions  contemplated by the
         ACC Agreement shall have been  consummated in accordance with the terms
         of such agreement or such  agreement  shall have been  terminated  and,
         prior thereto,  the transactions  contemplated by the US Wats Agreement
         shall  have  been  consummated  in  accordance  with the  terms of such
         agreement or such agreement shall have been terminated.

                  8.3. Conditions to Obligations of the Company. The obligations
of the Company to consummate the transactions contemplated by this Agreement are
subject  to the  fulfillment  at or prior to the  Effective  Time of each of the
following  conditions,  any or all of which may be waived in whole or in part by
the Company to the extent permitted by applicable Law:

                  (a)  Representations  and Warranties True. The representations
         and  warranties of Parent and Merger Sub contained  herein or otherwise
         required  to be made  after  the date  hereof  in a  writing  expressly
         referred to herein by or on behalf of Parent and Merger Sub pursuant to
         this  Agreement,  to the extent  qualified by  materiality  or Material
         Adverse  Effect,  shall have been true and, to the extent not qualified
         by materiality or Material Adverse Effect,  shall have been true in all
         material respects,  in each case when made and on and as of the Closing
         Date as

                                      -49-
<PAGE>


         though made on and as of the Closing Date  (except for  representations
         and warranties made as of a specified date, which need be true, or true
         in all material respects,  as the case may be, only as of the specified
         date).

                  (b)  Performance.  Parent shall have  performed or complied in
         all material  respects with all  agreements  and  conditions  contained
         herein  required to be performed or complied  with by it prior to or at
         the time of the Closing.

                  (c) Compliance Certificate. Parent shall have delivered to the
         Company a  certificate,  dated the date of the  Closing,  signed by the
         President  or any  Vice  President  of  Parent  (but  without  personal
         liability thereto),  certifying as to the fulfillment of the conditions
         specified in Sections 8.3(a) and 8.2(b).

                  (d) Tax Opinion. The Company shall have received an opinion of
         Dow, Lohnes & Albertson,  PLLC, dated the Effective Time, to the effect
         that (i) the Merger will be treated for federal  income tax purposes as
         a reorganization within the meaning of Section 368(a) of the Code; (ii)
         each of  Parent,  Merger  Sub and the  Company  will be a party  to the
         reorganization  within the meaning of Section 368(b) of the Code; (iii)
         no gain or loss will be  recognized  by the  Company as a result of the
         Merger; and (iv) no gain or loss will be recognized by a stockholder of
         the  Company  as a result of the  Merger  with  respect  to the  Shares
         converted solely into Parent Common Shares.  In rendering such opinion,
         Dow, Lohnes & Albertson, PLLC may receive and rely upon representations
         contained in  certificates  of Parent and Merger Sub, the Company,  the
         Cable  Stockholders  and  others,  in each  case in form and  substance
         reasonably acceptable to Dow, Lohnes & Albertson, PLLC.


                                   ARTICLE IX

                                   TERMINATION

                  9.1.  Termination  by Mutual  Consent.  This  Agreement may be
terminated  and the Merger may be abandoned  at any time prior to the  Effective
Time,  before or after the  approval by holders of Shares,  either by the mutual
written  consent  of  Parent  and the  Company,  or by  mutual  action  of their
respective Boards of Directors.

                  9.2.  Termination  by  Either  Parent  or  the  Company.  This
Agreement may be terminated (upon notice from the terminating party to the other
parties)  and the Merger may be aban-

                                      -50-
<PAGE>


doned by action of the Board of Directors of either Parent or the Company if (a)
the Merger shall not have been  consummated by December 31, 1998,  provided that
the  right to  terminate  this  Agreement  under  this  clause  (a) shall not be
available  to any party  whose  failure to  fulfill  any  obligation  under this
Agreement  has been the cause of or  resulted  in the  failure  of the Merger to
occur on or before such date,  and  provided,  further,  that such date shall be
extended  to March 31, 1999 in the event that the failure of the Merger to occur
on or before December 31, 1998 is the result of (i) a delay  attributable to any
transaction  permitted  pursuant to Section 7.5(c) or (ii) the failure of any of
the  conditions  set forth in  Section  8.1(b),  8.1(c),  8.2(f) or 8.2(j) to be
satisfied or waived  prior to December  31, 1998,  or (b) any court of competent
jurisdiction  in the United  States or  Governmental  Body in the United  States
shall  have  issued  an order,  decree  or  ruling  or taken  any  other  action
permanently restraining,  enjoining or otherwise prohibiting the Merger and such
order, decree, ruling or other action shall have become final and nonappealable.
In addition, this Agreement may be terminated by Parent (upon notice from Parent
to the  Company)  and the  Merger  may be  abandoned  by  action of the Board of
Directors of Parent if any of the Cable  Stockholders shall have breached any of
its representations,  covenants or obligations under the Voting Agreement in any
material respect and such breach shall not be curable.

                  9.3.  Termination  by  the  Company.  This  Agreement  may  be
terminated  (upon  notice  to  Parent)  by the  Company  and the  Merger  may be
abandoned by action of the Board of Directors of the Company if Parent or Merger
Sub  breaches  or fails in any  material  respect to perform or comply  with its
covenants and agreements  contained herein or breaches its  representations  and
warranties, in each case that is not curable, such that the conditions set forth
in Sections 8.3(a) and (b) cannot be satisfied.

                  9.4.  Termination by Parent and Merger Sub. This Agreement may
be  terminated  (upon  notice to the  Company) by Parent and Merger Sub, and the
Merger may be  abandoned  by action of the Board of  Directors  of Parent if the
Company  breaches or fails in any material respect to perform or comply with its
covenants and agreements  contained herein or breaches its  representations  and
warranties, in each case that is not curable, such that the conditions set forth
in Section 8.2(a) and (b) cannot be satisfied.

                  9.5.  Effect of Termination and  Abandonment.  In the event of
termination  of this Agreement and  abandonment  of the Merger  pursuant to this
Article IX, no party hereto (or any of its directors or officers) shall have any
liability or further

                                      -51-
<PAGE>


obligation to any other party to this  Agreement,  except as provided in Section
7.6 and except that nothing herein will relieve any party from liability for any
breach of this Agreement.


                                    ARTICLE X

                            MISCELLANEOUS AND GENERAL

                  10.1.  Expenses.  Except as set forth in  Section  7.11,  each
party  shall  bear its own  expenses,  including  the fees and  expenses  of any
attorneys,   accountants,   investment  bankers,   brokers,   finders  or  other
intermediaries  or other Persons engaged by it, incurred in connection with this
Agreement and the transactions contemplated hereby; provided,  however, that the
costs and expenses of filing the Information  Statement/Prospectus  with the SEC
and any other applicable  Governmental Body or securities  regulatory authority,
and of printing the Information Statement/Prospectus, shall be paid by Parent.

                  10.2. Notices,  Etc. All notices,  requests,  demands or other
communications  required by or otherwise with respect to this Agreement shall be
in  writing  and  shall be deemed  to have  been  duly  given to any party  when
delivered  personally  (by courier  service or  otherwise),  when  delivered  by
telecopy and confirmed by return telecopy, or upon receipt after being mailed by
first-class  mail,  postage prepaid and return receipt requested in each case to
the applicable addresses set forth below:

                  If to the Company:

                           Teleport Communications Group Inc.
                           429 Ridge Road
                            Dayton, New Jersey 08810
                           Attn:  Chairman, President and CEO
                            Facsimile: (732) 392-3600

                  with a copy to:

                          Dow, Lohnes & Albertson, PLLC
                         1200 New Hampshire Avenue, N.W.
                                Washington, D.C.
                           Attn: Leonard J. Baxt, Esq.
                                 Timothy J. Kelley, Esq.
                            Facsimile: (202) 776-2222

                  and a copy to:

                           Simpson Thacher & Bartlett
                           425 Lexington Avenue

                                      -52-
<PAGE>

                            New York, New York 10017
                          Attn: Philip T. Ruegger, Esq.
                              Michael Wolfson, Esq.
                            Facsimile: (212) 455-2502

                  If to Parent or Merger Sub:

                           AT&T Corp.
                             295 North Maple Avenue
                           Basking Ridge, New Jersey  07920
                            Attn: Vice President-Law
                                   and Corporate Secretary
                            Facsimile: (908) 221-6618

                  with a copy to:

                         Wachtell, Lipton, Rosen & Katz
                           51 West 52nd Street
                            New York, New York 10019
                         Attn: Richard D. Katcher, Esq.
                            Steven A. Rosenblum, Esq.
                            Facsimile: (212) 403-2000

or to such other address as such party shall have  designated by notice so given
to each other party.

                  10.3. Amendments, Waivers, Etc. This Agreement may be amended,
changed,  supplemented,  waived or otherwise  modified  only by an instrument in
writing  signed by the party (or, in the case of Section  7.7,  the  Indemnified
Party) against whom enforcement is sought;  provided that, after the adoption of
this Agreement by the  stockholders of the Company,  no such amendment,  change,
supplement  or waiver  shall be made without the further  requisite  approval of
such  stockholders  if such  amendment,  change,  supplement  or  waiver  by law
requires the further approval by such stockholders.

                  10.4. No Assignment.  This Agreement shall be binding upon and
shall  inure to the  benefit  of and be  enforceable  by the  parties  and their
respective successors and assigns;  provided that, except as otherwise expressly
set forth in this Agreement, neither the rights nor the obligations of any party
may be assigned or  delegated  without  the prior  written  consent of the other
party.

                  10.5. Entire Agreement.  Except as otherwise  provided herein,
this Agreement (together with the  Confidentiality  Agreement between Parent and
the Company and the other agreements expressly contemplated hereby) embodies the
entire agreement and  understanding  between the parties relating to the subject
matter

                                      -53-
<PAGE>


hereof and supersedes all prior agreements and  understandings  relating to such
subject  matter.  There are no  representations,  warranties or covenants by the
parties hereto  relating to such subject  matter other than those  expressly set
forth in this  Agreement  (including  the Company  Disclosure  Statement and the
Parent Disclosure Statement) and any writings expressly required hereby.

                  10.6. Specific Performance. The parties acknowledge that money
damages are not an adequate remedy for violations of this Agreement and that any
party may, in its sole  discretion,  apply to a court of competent  jurisdiction
for specific  performance  or  injunctive or such other relief as such court may
deem just and proper in order to enforce this Agreement or prevent any violation
hereof and, to the extent  permitted by  applicable  Law,  each party waives any
objection to the imposition of such relief.

                  10.7.  Remedies  Cumulative.  All rights,  powers and remedies
provided under this Agreement or otherwise available in respect hereof at law or
in equity shall be cumulative and not alternative, and the exercise or beginning
of the exercise of any thereof by any party shall not preclude the  simultaneous
or later exercise of any other such right, power or remedy by such party.

                  10.8.  No Waiver.  The failure of any party hereto to exercise
any right, power or remedy provided under this Agreement or otherwise  available
in respect hereof at law or in equity, or to insist upon compliance by any other
party hereto with its obligations  hereunder,  and any custom or practice of the
parties at variance with the terms hereof, shall not constitute a waiver by such
party of its right to exercise  any such or other  right,  power or remedy or to
demand such compliance.

                  10.9.  No Third Party  Beneficiaries.  This  Agreement  is not
intended to be for the benefit of and shall not be  enforceable by any Person or
entity  who or  which  is not a party  hereto,  except  for the  indemnification
provisions  contained in Section 7.7,  which  provisions  may be enforced by any
Indemnified  Party referred to therein and except that the provisions of Section
7.3(b) may be  enforced  by holders of Shares.  Notwithstanding  anything to the
contrary  contained in this  Agreement,  the  provisions  of Section 7.7 of this
Agreement  may not be  amended or  altered  in any  manner  with  respect to any
Indemnified  Party without the written  consent of such  Indemnified  Party.  No
assignment of this Agreement  shall relieve  Parent from its  obligations to any
Indemnified Party contained in Section 7.7 of this Agreement.

                  10.10. Jurisdiction.  Each party hereby irrevocably submits to
the exclusive  jurisdiction of the United States Dis-

                                      -54-
<PAGE>


trict Court for the District of Delaware or the  Chancery  Court of the State of
Delaware in any  action,  suit or  proceeding  arising in  connection  with this
Agreement,  and agrees that any such action, suit or proceeding shall be brought
only in such court (and waives any  objection  based on forum non  conveniens or
any other objection to venue therein);  provided,  however, that such consent to
jurisdiction  is solely for the purpose  referred to in this  Section  10.10 and
shall  not be  deemed to be a general  submission  to the  jurisdiction  of said
courts or in the State of Delaware other than for such purpose.  Parent,  Merger
Sub and the Company hereby waive any right to a trial by jury in connection with
any such action, suit or proceeding.

                  10.11. Public Announcements. Parent and the Company will agree
upon the timing and content of the initial press release to be issued describing
the  transactions  contemplated by this Agreement,  and will not make any public
announcement  thereof prior to reaching such agreement  unless required to do so
by applicable Law or regulation.  To the extent  reasonably  requested by either
party,  each  party  will  thereafter   consult  with  and  provide   reasonable
cooperation  to the other in  connection  with the  issuance  of  further  press
releases or other public documents  describing the transactions  contemplated by
this Agreement.

                  10.12.   Governing   Law.  This  Agreement  and  all  disputes
hereunder shall be governed by and construed and enforced in accordance with the
internal laws of the State of Delaware, without regard to principles of conflict
of laws.

                  10.13. Name,  Captions,  Etc. The name assigned this Agreement
and the section  captions used herein are for  convenience of reference only and
shall not affect the  interpretation  or construction  hereof.  Unless otherwise
specified,  (a) the terms  "hereof",  "herein"  and similar  terms refer to this
Agreement as a whole and (b) references  herein to Articles or Sections refer to
articles or sections of this  Agreement.  Wherever  appearing  herein,  the word
"including" shall be deemed to be followed by the words "without limitation."

                  10.14.  Counterparts.  This  Agreement  may be executed in any
number of counterparts, each of which shall be deemed to be an original, but all
of which together shall constitute one instrument.  Each counterpart may consist
of a number of copies each signed by less than all, but together  signed by all,
the parties hereto.

                  10.15. Survival of Representations,  Warranties, Covenants and
Agreements.  The  respective  representations  and  warranties  of  the  parties
contained herein or in any certificates or other documents delivered prior to or
at the Closing  shall

                                      -55-
<PAGE>


survive the  execution  and  delivery  of this  Agreement,  notwithstanding  any
investigation  made or  information  obtained  by the other  parties,  but shall
terminate at the Effective Time. The respective  covenants and agreements of the
parties  contained  herein or in any  certificates or other documents  delivered
prior to or at the Closing  shall  survive the  execution  and  delivery of this
Agreement and shall only terminate in accordance with their respective terms.

                  10.16.  Severability.  In case any provision in this Agreement
shall  be  held  invalid,  illegal  or  unenforceable  in a  jurisdiction,  such
provision shall be modified or deleted, as to the jurisdiction involved, only to
the extent necessary to render the same valid,  legal and  enforceable,  and the
validity,  legality and enforceability of the remaining  provisions hereof shall
not in any way be affected or impaired thereby nor shall the validity,  legality
or   enforceability   of  such  provision  be  affected  thereby  in  any  other
jurisdiction.

                  10.17. Disclosure Statements. The parties acknowledge that the
Company  Disclosure  Statement  and  the  Parent  Disclosure  Statement  to this
Agreement (i) relate to certain matters concerning the disclosures  required and
transactions  contemplated  by this  Agreement,  (ii)  are  qualified  in  their
entirety by reference to specific  provisions of this  Agreement,  (iii) are not
intended to constitute and shall not be construed as indicating that such matter
is  required to be  disclosed,  nor shall such  disclosure  be  construed  as an
admission  that such  information  is  material  with  respect to the Company or
Parent, as the case may be, except to the extent required by this Agreement, and
(iv)  disclosure  of the  information  contained  in one  section or part of the
Company Disclosure  Statement or the Parent Disclosure Statement shall be deemed
as  proper  disclosure  for all  sections  or  parts of the  Company  Disclosure
Statement  or the  Parent  Disclosure  Statement,  as the case  may be,  only if
appropriately  cross-referenced  or if the relevance thereof is clearly apparent
from the context in which it appears.













                                      -56-
<PAGE>




                  IN WITNESS  WHEREOF,  this  Agreement  has been  executed  and
delivered by the parties set forth below.

                                        TELEPORT COMMUNICATIONS GROUP INC.



                                        By:       /s/ Robert Annunziata
                                        -----------------------------------
                                        Name:     Robert Annunziata
                                        Title:    Chairman, President
                                                    and CEO



                                        AT&T CORP.



                                        By:       /s/ C. Michael Armstrong
                                        -----------------------------------
                                        Name:     C. Michael Armstrong
                                        Title:    Chairman and CEO


                                        TA MERGER CORP.



                                        By:       /s/ Daniel E. Somers
                                        -----------------------------------
                                        Name:     Daniel E. Somers
                                        Title:    President


                                VOTING AGREEMENT


                  AGREEMENT,  dated as of  January  8,  1998,  by and among AT&T
Corp.,  a New  York  corporation  ("Parent"),  on  the  one  hand,  and  Comcast
Corporation,  Comcast Teleport,  Inc., Comcast Communications  Properties,  Inc.
(Comcast Corporation, Comcast Teleport, Inc., Comcast Communications Properties,
Inc., collectively,  "Comcast"),  Tele-Communications,  Inc., TCI Teleport, Inc.
(together with Tele-Communications,  Inc., "TCI"), Cox Communications,  Inc. and
Cox Teleport Partners, Inc. (together with Cox Communications,  Inc., "Cox"), on
the other  hand.  Comcast,  TCI and Cox shall be  referred  to herein  each as a
"Stockholder"  (each reference to a "Stockholder"  referring to the two or three
companies  collectively  constituting  Comcast, TCI or Cox, as the case may be),
and  Comcast,  TCI  or  Cox  together  are  collectively   referred  to  as  the
"Stockholders".  Each  Stockholder  is  executing  this  Agreement  only  in its
capacity as a  stockholder  of Teleport  Communications  Group Inc.,  a Delaware
corporation (the "Company"). The Company is executing this Agreement solely with
respect to Section 6(e) and Annex B.

                  WHEREAS,  concurrently  herewith,  Parent,  TA Merger Corp., a
Delaware corporation and a wholly owned subsidiary of Parent ("Merger Sub"), and
the Company  are  entering  into an  Agreement  and Plan of Merger (the  "Merger
Agreement"; capitalized terms used without definition herein having the meanings
ascribed thereto in the Merger Agreement);

                  WHEREAS,  each  Stockholder is the record and beneficial owner
of the number of Shares set forth opposite such Stockholder's name in Schedule I
hereto;

                  WHEREAS,  approval of the Merger  Agreement  by the  Company's
stockholders is a condition to the consummation of the Merger;

                  WHEREAS,  the Board of Directors of the Company has,  prior to
the  execution  of this  Agreement,  duly and validly  approved  and adopted the
Merger  Agreement and approved this  Agreement,  and such approvals and adoption
have not been withdrawn; and

                  WHEREAS,   Parent  is  unwilling  to  enter  into  the  Merger
Agreement unless the Stockholders  enter into this Agreement  concurrently  with
the execution of the Merger  Agreement and execute and deliver the  Stockholders
Consent immediately  thereafter,  and the Stockholders desire and are willing to
induce Parent to enter into the Merger Agreement by their entry into


<PAGE>


this  Agreement  and their  agreement  to execute and  deliver the  Stockholders
Consent;

                  NOW  THEREFORE,  in  consideration  of the  foregoing  and the
mutual  covenants and agreements  set forth herein,  the parties hereto agree as
follows:


                  Section 1. Consent;  Agreement to Vote.  (a) Each  Stockholder
agrees  (for  itself  and not as to any  other  Stockholder)  that,  immediately
following the execution and delivery of this Agreement and the Merger Agreement,
it shall  execute and  deliver,  or cause to be executed  and  delivered  by the
record  owner  thereof,  in  accordance  with  Section  228  of  the  DGCL,  the
Stockholders  Consent in the form attached hereto as Annex A with respect to all
Shares that are owned  beneficially  or of record by such  Stockholder  or as to
which such Stockholder has, directly or indirectly,  the right to vote or direct
the voting.

                  (b) Unless one of the events  specified in clause (i), (ii) or
(iii) of  Section  7.3(b) of the Merger  Agreement  has  occurred  or Parent has
breached Section 6(d) below in any material  respect,  each  Stockholder  hereby
further agrees (for itself and not as to any other Stockholder) that, during the
term of this Agreement,  it shall,  from time to time, at the request of Parent,
(i) timely execute and deliver (or cause to be timely executed and delivered) an
additional  written consent with respect to, or (ii) vote, or cause to be voted,
at any meeting of  stockholders  of the Company held prior to the earlier of the
Effective Time (as defined in the Merger  Agreement) and the termination of this
Agreement or at any adjournment or postponement  thereof, in person or by proxy,
all Shares,  and any other voting  securities of the Company  (whether  acquired
heretofore or hereafter), that are beneficially owned by such Stockholder or its
Affiliates  or as to  which  such  Stockholder  or any of  its  Affiliates  has,
directly or indirectly,  the right to vote or direct the voting, (x) in favor of
approval  and  adoption  of the Merger  Agreement,  the  Merger,  and any action
required in furtherance  thereof, (y) against any action or agreement that would
result  in a  material  breach  of any  representation,  warranty,  covenant  or
obligation of the Company contained in the Merger Agreement, and (z) against any
Competing  Transaction (as defined below). Each Stockholder  agrees,  during the
period  commencing on the date hereof and ending on the earlier of the Effective
Time and the termination of this Agreement, not to, and not to permit any of its
Affiliates to, execute any written consent in lieu of a stockholders  meeting or
vote of the Company,  if such consent or vote by the stockholders of the Company
would be inconsistent  with or frustrate the purposes of the other agreements of
such Stockholder pursuant to this paragraph (it

                                      -2-
<PAGE>


being  understood that the  Stockholders may vote for or consent to transactions
expressly  permitted by the Merger Agreement).  A "Competing  Transaction" means
any Acquisition Proposal, other than the transactions  contemplated or expressly
permitted  by the Merger  Agreement,  or any  amendment  to the  certificate  of
incorporation  of the Company or any other  proposal that  frustrates or hinders
the Merger or the other transactions contemplated by the Merger Agreement.

                  (c) Each  Stockholder  agrees  that it will not,  and will not
permit any of its Affiliates  to,  contract to sell,  sell or otherwise  pledge,
encumber,  transfer  or dispose of any of the Shares  owned  beneficially  or of
record by it or any interest therein or securities  convertible thereinto or any
voting rights with respect thereto,  other than (i) pursuant to the Merger, (ii)
pursuant to Section 3(b) hereof or (iii) with Parent's prior written consent.

                  (d)  Each  Stockholder  hereby  revokes  any and all  previous
proxies with respect to such Person's  Shares or any other voting  securities of
the Company.

                  (e) Each  Stockholder  hereby  agrees  to,  and to  cause  its
Affiliates to,  cooperate  reasonably  with Parent and the Company in connection
with the Merger  Agreement and  consummation  of the  transactions  contemplated
thereby.  Parent  agrees  to  cooperate  reasonably  with  each  Stockholder  in
connection with any filings required to be made by such Stockholder  pursuant to
the HSR Act in  connection  with the Merger  Agreement and  consummation  of the
transactions  contemplated  thereby.  Each  Stockholder  agrees  that it and its
Affiliates  will  not,  and will use  reasonable  best  efforts  to cause  their
respective officers,  employees,  representatives and agents not to, directly or
indirectly, encourage, solicit or engage in discussions or negotiations with any
third party (other than Parent) concerning any Acquisition Proposal,  other than
the  transactions  contemplated  hereby and by the Merger  Agreement.  Each such
Stockholder  shall  immediately   request  that  any  Person  (other  than  such
Stockholder's  agents,  advisors and representatives) that has received directly
or indirectly from such Stockholder any confidential information relating to the
Company or any of its  Subsidiaries in connection  with an Acquisition  Proposal
within  the past  180 days  return  all  copies  thereof  to the  Company.  Each
Stockholder and its Affiliates  shall,  and shall use reasonable best efforts to
cause  their  respective  officers,  employees,  representatives  and agents to,
terminate all  discussions or  negotiations  with any Person with respect to any
Acquisition  Proposal.  Each such Stockholder will notify Parent  immediately of
any  Acquisition  Proposal (or inquires with respect  thereto) that are received
by, or any negotiations or discussions with respect

                                      -3-
<PAGE>


thereto  of  which it is  aware  that are  sought  to be  initiated  with,  such
Stockholder or any of its Affiliates or the Company or any of its  Subsidiaries,
will advise  Parent of the  identity of any Person  making any such  Acquisition
Proposal and of the terms thereof and shall keep Parent apprised with respect to
all matters relating thereto.

                  Section 2.  Securities Act Covenants and  Representations.  In
addition to, and not in lieu of, the other  covenants  and  representations  set
forth  herein,  each  Stockholder  hereby  agrees  and  represents  to Parent as
follows:

                  (a) Such  Stockholder  understands  that,  to the extent  such
Stockholder  is considered an  "affiliate" of the Company at the time the Merger
Agreement  is  submitted  for a vote of the  stockholders  of the Company or for
action by written consent of stockholders of the Company,  any public  offering,
sale or other  disposition  by such  Stockholder or any of its Affiliates of any
Parent Common Shares  received by such Person in the Merger  (collectively,  the
"Restricted  Sales")  will,  under  current law,  require any of (i) the further
registration  under the Securities Act of any Parent Common Shares to be sold by
such Person, (ii) compliance with applicable  provisions of Rule 145 promulgated
by the SEC  under  the  Securities  Act or (iii)  the  availability  of  another
exemption  from such  registration  under the Securities  Act. Each  Stockholder
agrees not to, or permit any of its  Affiliates  to,  make any  Restricted  Sale
unless the conditions of clause (i), (ii) or (iii) are met.

                  (b) Such  Stockholder  also  understands  that  stop  transfer
instructions  will be given to  Parent's  transfer  agents  with  respect to the
Parent Common Shares,  and that a legend will be placed on the  certificates for
the Parent  Common  Shares,  issued to such  Stockholder,  or any  substitutions
therefor to reflect the  restrictions  referred to in Sections 2(a) and 3 hereof
on such Stockholder's ability to sell Parent Common Shares.

                  Section 3. Pooling Covenants and Representations.  In addition
to,  and not in lieu of,  the  other  covenants  and  representations  set forth
herein, each Stockholder hereby agrees and represents to Parent that:

                  (a) from and after the date hereof, such Stockholder will not,
         and will not permit any of its Affiliates to, sell, transfer, hedge, or
         otherwise  dispose of or reduce its rights  with  respect to any Shares
         (whether  owned as of the date  hereof or  hereafter  acquired)  or any
         Parent  Common  Shares  received by such  Stockholder  in the Merger or
         other shares of capital stock of Parent until after such time as

                                      -4-
<PAGE>


         results covering at least 30 days of combined operations of the Company
         and Parent have been  published  by Parent,  in the form of a quarterly
         earnings  report,  an effective  registration  statement filed with the
         SEC, a report to the SEC on Form 10-K, 10-Q or 8-K, or any other public
         filing  or  announcement   which  includes  the  combined   results  of
         operations,  except for  transfers or other  dispositions  that, in the
         reasonable  opinion  of  Parent's  independent  accountants,  will  not
         prevent  Parent  from  accounting  for  the  Merger  as  a  pooling  of
         interests,  taking into account the actions of other  Affiliates of the
         Company or the Stockholders; and

                  (b) upon Parent's request, in connection with the transactions
         contemplated by the ACC Agreement (as defined in the Merger  Agreement)
         and in  order to  permit  such  transaction  to be  accounted  for on a
         pooling of interests basis, such Stockholder  shall, or shall cause its
         Affiliates  to, convert into Class A Common Stock such number of shares
         of  Class B  Common  Stock  as will  constitute  its pro  rata  portion
         (rounded  up to the  nearest  whole  share) of that number of shares of
         Class B Common Stock that would be necessary,  when taken together with
         such  conversions  of all of the  other  Stockholders,  to  permit  the
         Company's pending business  combination with Ace to be accounted for as
         a pooling of interests.

                  Section 4. Tax Covenants and Representations.  In addition to,
and not in lieu of, the other  covenants and  representations  set forth herein,
each Stockholder  hereby  represents and warrants to Parent that, as of the date
hereof  and as of the  Closing  Date,  such  Stockholder  has and shall  have no
present  plan or  intention  to sell,  exchange or  otherwise  dispose of Parent
Common Shares to be received by such  Stockholder  in the Merger having a value,
as of the  Effective  Time,  greater  than (a) 50 percent of the value as of the
Effective  Time of all of such  Stockholder's  Shares as of the  Effective  Time
minus (b) such  Stockholder's pro rata portion of the value of any Excess Parent
Common Shares identified in the certificate required pursuant to Section 7.10 of
the Merger Agreement (which amount shall not be less than zero). For purposes of
the  foregoing,  "Excess  Parent Common  Shares" shall mean 50% of the number of
Parent Common Shares owned by Persons other than the Stockholders, and "pro rata
portion" as to any  Stockholder  shall mean the number of Parent  Common  Shares
owned by such  Stockholder  divided by the total number of Parent  Common Shares
owned by all Stockholders. For purposes of this representation, Shares exchanged
for  cash in  lieu of  fractional  Parent  Common  Shares  will  be  treated  as
outstanding  Shares on the Effective  Time.  Moreover,  Shares and Parent Common
Shares  held by  stockholders  of the Company and  otherwise  sold,  redeemed or
disposed of prior or subsequent to

                                      -5-
<PAGE>


the Merger will be considered in making this  representation.  Each  Stockholder
agrees to deliver to Parent's counsel, if so requested by Parent's counsel,  and
to  the  Company's  counsel,  if  so  requested  by  the  Company's  counsel,  a
certificate  setting forth the above  representations  in this Section 4 by such
Stockholder,  which certificate (and the representations  therein) may be relied
upon by Parent's  counsel and by the Company's  counsel in  connection  with the
opinions contemplated by Sections 8.2(d) and 8.3(d) of the Merger Agreement.

                  Section  5.  Registration   Rights.  The  Registration  Rights
Agreement  shall be executed by the  parties  set forth  therein as  signatories
thereto  immediately  following  execution of this  Agreement,  and shall become
effective as of the Effective Time.

                  Section 6.  Other Covenants and Agreements.

                  (a)  Consent  to  this  Agreement.   Each  Stockholder  hereby
consents, for purposes of the Stockholders'  Agreement, to the execution of this
Agreement  and the  Stockholders  Consent  by  each  other  Stockholder  and the
consummation of the transactions contemplated hereby (and waives any rights such
Stockholder  would  otherwise  have pursuant to the  Stockholders'  Agreement by
virtue of the execution of this Agreement and the Stockholders Consent).

                  (b) Further Assurances.  Unless one of the events specified in
clause (i), (ii) or (iii) of Section 7.3(b) of the Merger Agreement has occurred
or Parent has breached  Section 6(d) below in any material  respect,  each party
shall execute and deliver such  additional  instruments  and other documents and
shall  take  such  further  actions  as  may  be  necessary  or  appropriate  to
effectuate,  carry  out  and  comply  with  all of its  obligations  under  this
Agreement. Without limiting the generality of the foregoing, none of the parties
hereto  shall  enter into any  agreement  or  arrangement  (or  alter,  amend or
terminate any existing agreement or arrangement) if such action would materially
impair the ability of such party to effectuate,  carry out or comply with all of
the terms of this Agreement.

                  (c)  Release  of  Certain  Restrictions.  Effective  as of the
Effective Time, each Stockholder  hereby releases the Company and its Affiliates
(other than the Stockholders and their other Affiliates) from, and waives in all
respects,  any  obligation  that may  exist  to such  Stockholder  or any  other
agreement with such  Stockholder (i) not to compete with such Stockholder or any
of its Affiliates  anywhere in the world, (ii) not to engage, or to refrain from
engaging,  in any  activity  anywhere  in the  world,  or (iii)  that  otherwise
restricts  or limits the  ability of the  Company  or any of its  Affiliates  to
engage in any business

                                      -6-
<PAGE>


anywhere in the world;  provided  however that the foregoing  shall not apply to
(x) any provision of the Restated Facilities  Agreements (as defined in Annex B)
or (y) the  Agreement  entered  into as of the  18th  day of  April  1996  among
Teleport  and  Comcast  Corporation,  provided  that  as of the  Effective  Time
paragraph  2(e) of such agreement is hereby  amended to be  inapplicable  to the
extent and for so long as  compliance  therewith  by the Company  would  violate
existing legal obligations of Parent and its Affiliates.

                  (d) Other Matters.  Parent will not agree to the inclusion, in
any  Authorization  required in connection with the Merger, of the imposition by
any  Governmental  Body of any  restriction  on any  Stockholder's  exercise and
enjoyment of full rights of ownership of Parent  Common Shares to be acquired by
such  Stockholder  in the Merger,  any  material  modification  of any  license,
franchise  or permit  held by such  Stockholder  or any of its  Affiliates,  the
imposition of any requirement  relating to the divestiture or  rearrangement  of
the  composition  of any  material  assets  of  such  Stockholder  or any of its
Affiliates,  material limitation on such Stockholder's or any of its Affiliate's
freedom of action with respect to future  acquisitions of assets or with respect
to any existing or future  business  activities or relationship or the enjoyment
by such  Stockholder  or any of its  Affiliates of the full rights of ownership,
possession and use of any material asset now owned or hereafter acquired by such
Stockholder or any of its  Affiliates  (including the Parent Common Shares to be
acquired by such Shareholder in the Merger), or any other material restrictions,
limitations,  requirements,  or  conditions  which are  reasonably  likely to be
burdensome  on such  Stockholder  or its  Affiliates  (any of the  foregoing,  a
"Prohibited  Effect"),  in the case of any of the foregoing that is unacceptable
to such Stockholder in its reasonable judgment. Notwithstanding anything in this
Agreement to the contrary,  no  Stockholder  shall be required to consent to any
Prohibited  Effect that is  unacceptable  to such  Stockholder in its reasonable
judgment.

                  (e) Facilities  Arrangements.  Each of the Stockholders agrees
that the  Existing  Arrangements  (as  defined in Annex B hereto)  between  such
Stockholder  and/or  any of its  Affiliates,  on the one hand,  and the  Company
and/or any of its Affiliates,  on the other hand,  shall be amended as specified
in Annex B hereto,  effective  immediately (which Annex B is incorporated herein
by reference).

                  Section 7.  Representations  and Warranties of Parent.  Parent
represents and warrants to each Stockholder as follows:

                                      -7-
<PAGE>


                  (a) This Agreement and the Registration  Rights Agreement have
been  approved by the Board of Directors of Parent,  representing  all necessary
corporate action on the part of Parent for the execution and performance  hereof
and thereof by Parent (no action by the stockholders of Parent being required).

                  (b) This  Agreement  has  been,  and the  Registration  Rights
Agreement will be, duly executed and delivered by a duly  authorized  officer of
Parent.

                  (c) This Agreement  constitutes,  and the Registration  Rights
Agreement when duly executed and delivered will constitute,  a valid and binding
agreement of Parent, enforceable against Parent in accordance with its terms.

                  (d) The  execution  and  delivery of this  Agreement by Parent
does not, and the execution and delivery of the Registration Rights Agreement by
Parent will not,  violate or breach,  and will not give rise to any violation or
breach, of Parent's charter or bylaws,  or, except as will not materially impair
its  ability to  effectuate,  carry out or comply  with all of the terms of this
Agreement and the Registration Rights Agreement, any law, contract,  instrument,
arrangement or agreement by which Parent is bound.

                  Section 8. Representations and Warranties of the Stockholders.
Each Stockholder, as to such Stockholder only, represents and warrants to Parent
as follows:

                  (a) Schedule I sets forth,  opposite such Stockholder's  name,
the  number  and type of  Shares  of which  such  Stockholder  is the  record or
beneficial owner. Such Stockholder is the lawful owner of such Shares,  free and
clear of all liens, charges, encumbrances,  voting agreements and commitments of
every  kind,  other than this  Agreement,  the  Stockholders'  Agreement  and as
disclosed  on  Schedule  I. Except as set forth in Schedule I and except for the
Stockholders' Agreement, neither such Stockholder nor any of its Affiliates owns
or holds any rights to acquire any additional  Shares or other securities of the
Company  or any  interest  therein  or any  voting  rights  with  respect to any
additional Shares or any other securities of the Company.

                  (b) This Agreement has been approved by the Board of Directors
and, to the extent necessary, the stockholders of such Stockholder, representing
all necessary corporate action on the part of such Stockholder for the execution
and performance hereof by such Stockholder.

                  (c) This  Agreement  has been duly executed and delivered by a
duly authorized officer of such Stockholder.

                                      -8-
<PAGE>


                  (d) This Agreement constitutes the valid and binding agreement
of such  Stockholder,  enforceable  against such Person in  accordance  with its
terms.

                  (e) The  execution  and  delivery  of this  Agreement  by such
Stockholder does not violate or breach,  and will not give rise to any violation
or breach,  of such  Stockholder's  charter or  bylaws,  or,  except as will not
materially  impair the ability of such  Stockholder to effectuate,  carry out or
comply with all of the terms of this Agreement,  any law, contract,  instrument,
arrangement or agreement by which such Stockholder is bound.

                  (f) The  execution  and  delivery  of this  Agreement  by such
Stockholder does not create or give rise to any right in such Stockholder or any
of their respective  Affiliates with respect to the Shares or any other security
of the  Company  (including,  without  limitation  voting  rights  and rights to
purchase  or  sell  any  such  Shares  or  other  securities)  pursuant  to  the
Stockholders' Agreement, other than any such right as is duly and validly waived
pursuant to Section 6(a) of this Agreement.

                  (g) The execution and delivery of the Stockholders  Consent by
the  Stockholders are adequate to approve and adopt the Merger Agreement and the
Merger without the vote or consent of any other stockholder of the Company.

                  (h) The Reorganization (as defined in the Company's prospectus
dated November 6, 1997) of the Company under the Reorganization  Agreement dated
as of April 18,  1996  among  the  Company,  the  Stockholders  and  Continental
Cablevision,  Inc.  (the  "Reorganization  Agreement")  has  been  completed  in
accordance with the terms thereof. Each Stockholder, on behalf of itself and its
Affiliates,   hereby  waives  all  defaults  and  executory   rights  under  the
Reorganization  Agreement  or any  partnership  agreement  of any  Local  Market
Partnership (as defined in the  Reorganization  Agreement) to any of Continental
Cablevision,  Inc.  or any  of the  Stockholders  or  any  of  their  respective
Affiliates.

                  Section 9.  Effectiveness  and  Termination.  In the event the
Merger Agreement is terminated in accordance with its terms (other than pursuant
to the last sentence of Section 9.2 thereof), this Agreement shall automatically
terminate and be of no further force or effect.  Upon such  termination,  except
for any rights any party may have in respect of any breach by any other party of
its  obligations  hereunder,  none of the parties  hereto shall have any further
obligation or liability  hereunder.  The provisions of Section 6(e) hereof shall
survive the Merger.

                                      -9-
<PAGE>


                  Section 10.  Miscellaneous.

                  (a)  Notices,  Etc. All  notices,  requests,  demands or other
communications  required by or otherwise with respect to this Agreement shall be
in  writing  and  shall be deemed  to have  been  duly  given to any party  when
delivered  personally  (by courier  service or  otherwise),  when  delivered  by
telecopy and confirmed by return  telecopy,  or seven days after being mailed by
first-class mail,  postage prepaid in each case to the applicable  addresses set
forth below:

                  If to Parent:

                           AT&T Corp.
                           295 North Maple Ave.
                             Basking Ridge, NJ 07920
                          Attention: Vice President-Law
                                       and Corporate Secretary
                            Facsimile: (908) 221-6618

                           with a copy to:

                         Wachtell, Lipton, Rosen & Katz
                           51 West 52nd Street
                            New York, New York 10019
                           Attn:  Richard D. Katcher, Esq. and
                                  Steven A. Rosenblum, Esq.
                            Telecopy: (212) 403-2000


                  If to the Company:

                           Teleport Communications Group Inc.
                           429 Ridge Road
                            Dayton, New Jersey 08810
                           Attention:  Chairman, President and CEO
                            Facsimile: (732) 392-3600

                           with a copy to:

                          Dow, Lohnes & Albertson, PLLC
                         1200 New Hampshire Avenue, N.W.
                             Washington, D.C. 20036
                        Attention: Leonard J. Baxt, Esq.
                                       Timothy J. Kelley, Esq.
                            Facsimile: (202) 776-2222

                           and with a copy to:

                           Simpson Thacher & Bartlett

                                      -10-
<PAGE>

                           425 Lexington Avenue
                            New York, New York 10017
                       Attention: Philip T. Ruegger, Esq.
                                       Michael Wolfson, Esq.
                            Facsimile: (212) 455-2502


                  If to Comcast:

                           Comcast Corporation
                           1500 Market Street
                             Philadelphia, PA 19102
                           Attention: General Counsel
                            Facsimile: (215) 981-7794

                           with a copy to:

                              Davis Polk & Wardwell
                           450 Lexington Avenue
                            New York, New York 10017
                         Attention: Dennis Hersch, Esq.
                            Facsimile: (212) 450-4800

                  If to TCI:

                            Tele-Communications, Inc.
                           5619 DTC Parkway
                            Englewood, CO 80111-3000
                         Attention: Leo J. Hendery, Jr.
                            Facsimile: (303) 488-3200

                           with a copy to:

                              Baker & Botts, L.L.P.
                           599 Lexington Avenue
                           29th Floor
                          New York, New York 10022-6030
                           Attention:  Elizabeth M. Markowski, Esq.
                            Facsimile: (212) 705-5125

                  If to Cox:

                              Cox Enterprises, Inc.
                              1400 Lake Hearn Drive
                           Atlanta, GA 30319
                           Attention: David M. Woodrow
                            Facsimile: (404) 847-6029

                           with a copy to:

                                      -11-
<PAGE>


                             Dow, Lohnes & Albertson
                         1200 New Hampshire Avenue, N.W.
                           Suite 800
                             Washington, D.C. 20036
                           Attention:  Stuart A. Sheldon, Esq.
                            Facsimile: (202) 776-2222

or to such other address as such party shall have  designated by notice received
by each other party.

                  (b)  Amendments,  Waivers,  Etc.  This  Agreement  may  not be
amended,  changed,  supplemented,  waived or otherwise  modified  or,  except as
expressly set forth in Section 9, terminated, except by an instrument in writing
signed by each party hereto.

                  (c)  Successors and Assigns.  This Agreement  shall be binding
upon and shall  inure to the  benefit of and be  enforceable  by the parties and
their respective  successors and assigns;  provided that, except as contemplated
by the Merger Agreement, neither the rights nor the obligations of any party may
be assigned or delegated  without the prior written consent of the other parties
except that Parent may assign its rights under  Section  6(e) to any  Subsidiary
(as defined in the Merger Agreement).

                  (d) Entire Agreement. This Agreement (together with the Merger
Agreement and the other agreements and documents  expressly  contemplated hereby
and thereby) embodies the entire agreement and  understanding  among the parties
relating to the subject matter hereof and  supersedes  all prior  agreements and
understandings  relating to such subject matter.  There are no  representations,
warranties or covenants by the parties  hereto  relating to such subject  matter
other than those expressly set forth in this Agreement and the Merger Agreement.

                  (e)  Severability.  If  any  term  of  this  Agreement  or the
application  thereof  to any  party or  circumstance  shall be held  invalid  or
unenforceable to any extent, the remainder of this Agreement and the application
of such term to the other parties or circumstances shall not be affected thereby
and shall be  enforced to the  greatest  extent  permitted  by  applicable  law,
provided  that, in such event,  the parties shall  negotiate in good faith in an
attempt to agree to another  provision (in lieu of the term or application  held
to be  invalid or  unenforceable)  that will be valid and  enforceable  and will
carry out the parties' intentions hereunder.

                  (f) Specific  Performance.  The parties acknowledge that money
damages are not an adequate remedy for violations of this Agreement and that any
party may, in its sole  discretion,

                                      -12-
<PAGE>


apply  to  a  court  of  competent  jurisdiction  for  specific  performance  or
injunctive  or such other relief as such court may deem just and proper in order
to enforce  this  Agreement or prevent any  violation  hereof and, to the extent
permitted by applicable  law, each party waives any objection to the  imposition
of such relief or any requirement for a bond.

                  (g)  Remedies  Cumulative.  All  rights,  powers and  remedies
provided under this Agreement or otherwise available in respect hereof at law or
in equity shall be cumulative and not alternative, and the exercise or beginning
of the exercise of any thereof by any party shall not preclude the  simultaneous
or later exercise of any other such right, power or remedy by such party.

                  (h) No Waiver. The failure of any party hereto to exercise any
right,  power or remedy provided under this Agreement or otherwise  available in
respect  hereof at law or in equity,  or to insist upon  compliance by any other
party hereto with its obligations  hereunder,  and any custom or practice of the
parties at variance with the terms hereof, shall not constitute a waiver by such
party of its right to exercise  any such or other  right,  power or remedy or to
demand such compliance.

                  (i)  No  Third  Party  Beneficiaries.  This  Agreement  is not
intended to be for the benefit of and shall not be  enforceable by any person or
entity who or which is not a party hereto.

                  (j) Jurisdiction. Each party hereby irrevocably submits to the
exclusive  jurisdiction of the Court of Chancery in the State of Delaware or the
United States  District  Court of Delaware or any court of the State of Delaware
in any action, suit or proceeding arising in connection with this Agreement, and
agrees that any such action,  suit or  proceeding  shall be brought only in such
court  (and  waives any  objection  based on forum non  conveniens  or any other
objection  to  venue  therein);   provided,   however,   that  such  consent  to
jurisdiction  is solely for the purpose  referred to in this  paragraph  (j) and
shall  not be  deemed to be a general  submission  to the  jurisdiction  of said
Courts or in the State of  Delaware  other  than for such  purposes.  Each party
hereto hereby  waives any right to a trial by jury in  connection  with any such
action, suit or proceeding.

                  (k) Governing Law. This  Agreement and all disputes  hereunder
shall be governed by and construed and enforced in accordance  with the internal
laws of the State of Delaware, without regard to principles of conflicts of law.

                  (l) Name,  Captions,  Gender. The name assigned this Agreement
and the section  captions used herein are for  convenience of reference only and
shall not affect the interpre-

                                      -13-
<PAGE>


tation or  construction  hereof.  Whenever the context may require,  any pronoun
used herein shall include the corresponding masculine, feminine or neuter forms.

                  (m) Counterparts. This Agreement may be executed in any number
of  counterparts,  each of which shall be deemed to be an  original,  but all of
which together shall constitute one instrument.  Each counterpart may consist of
a number of copies each signed by less than all, but together signed by all, the
parties hereto.

                  (n) Expenses.  Each of Parent and each Stockholder  shall bear
its own expenses incurred in connection with this Agreement and the transactions
contemplated hereby,  except that in the event of a dispute concerning the terms
or enforcement of this Agreement, the prevailing party in any such dispute shall
be entitled to reimbursement of reasonable legal fees and disbursements from the
other party or parties to such dispute.

                  (o) Action in Stockholder  Capacity Only. No Stockholder makes
any agreement or  understanding  herein as a director or officer of the Company.
Each Stockholder  signs solely in its capacity as a record holder and beneficial
owner of Shares and nothing  herein shall limit or affect any actions taken by a
representative  of such  Stockholder  in such  representative's  capacity  as an
officer or  director of the  Company  (it being  understood  and agreed that the
provisions of this paragraph  shall not affect the rights and obligations of any
party to the Merger Agreement or any other agreement).

                  (p) Obligations  Several.  The obligations of each Stockholder
under this Agreement  (including Annex B hereto) shall be several and not joint.
No Stockholder  shall have any liability,  duty or obligation  arising out of or
resulting from any failure by any other  Stockholder (or any Affiliate  thereof)
to comply with the terms and conditions of this Agreement.










                                      -14-
<PAGE>



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

                              AT&T CORP.




                              By:       /s/ John D. Zeglis
                              -----------------------------------
                              Name:     John D. Zeglis
                              Title:    President


                               COMCAST CORPORATION




                              By:       /s/ Lawrence S. Smith
                              -----------------------------------
                              Name:     Lawrence S. Smith
                              Title:    Executive Vice President


                            COX COMMUNICATIONS, INC.




                              By:       /s/ Jimmy W. Hayes
                              -----------------------------------
                              Name:     Jimmy W. Hayes
                              Title:    Senior Vice President of Finance;
                                          Chief Financial Officer


                            TELE-COMMUNICATIONS, INC.




                              By:       /s/ Bernard W. Schotters
                              -----------------------------------
                              Name:     Bernard W. Schotters
                              Title:    Senior Vice President Finance
                                          and Treasurer


<PAGE>



                             COMCAST TELEPORT, INC.




                              By:       /s/ Lawrence S. Smith
                              -----------------------------------
                              Name:     Lawrence S. Smith
                              Title:


                               TCI TELEPORT, INC.




                              By:       /s/ Bernard W. Schotters
                              -----------------------------------
                              Name:     Bernard W. Schotters
                              Title:


                              COX TELEPORT PARTNERS, INC.




                              By:       /s/ Jimmy W. Hayes
                              -----------------------------------
                              Name:     Jimmy W. Hayes
                              Title:


                              COMCAST COMMUNICATIONS PROPERTIES, INC.




                              By:       /s/ Lawrence S. Smith
                              -----------------------------------
                              Name:     Lawrence S. Smith
                              Title:



<PAGE>


Teleport  Communications  Group Inc. hereby  acknowledges its agreement with the
provisions of Annex B hereto.

TELEPORT COMMUNICATIONS GROUP INC.




By:       /s/ Robert Annunziata
- -----------------------------------
Name:     Robert Annunziata
Title:    Chairman, President
            and CEO


<PAGE>







                                   Schedule I

                                 Share Ownership


Name of Stockholder                        Shares Owned Beneficially

                              Class A Common Stock         Class B Common Stock

                             Shares          Options       Shares        Options

Comcast Corporation           None             None      25,622,058         None

Tele-Communications, Inc.  1,011,528           None      48,779,388         None

Cox Communications, Inc.      None             None      39,087,594         None

               Total





Name of Stockholder of Record               Shares Owned of Record

                              Class A Common Stock         Class B Common Stock

                             Shares          Options       Shares        Options

TCI Teleport, Inc.          1,011,528          None      48,779,388         None

Comcast Teleport, Inc.         None            None      25,438,036         None

Comcast Communications         None            None         184,022         None
Properties, Inc.

Cox Teleport Partners,         None            None      39,087,594         None
Inc.

               Total


<PAGE>







                                                                         Annex A


                                 WRITTEN CONSENT
                               OF STOCKHOLDERS OF
                       TELEPORT COMMUNICATIONS GROUP INC.

         Pursuant  to the  provisions  of  Section  228 and  Section  251 of the
General  Corporation Law of the State of Delaware,  the undersigned each holding
that  number of shares of Class A Common  Stock,  par value  $.01,  of  Teleport
Communications  Group Inc. (the  "Company") and that number of shares of Class B
Common  Stock,  par value $.01,  of the Company  (together,  "Shares") set forth
adjacent to its name below,  collectively  constituting a majority of the voting
power of the issued and  outstanding  Shares,  do hereby consent to, approve and
adopt the following resolution:

                  WHEREAS,  the Board of  Directors  of the Company has approved
         the Merger  Agreement  (as  defined  below) and has  directed  that the
         Merger  Agreement be submitted to the  stockholders  of the Company for
         their approval;

                  NOW THEREFORE,  BE IT RESOLVED, that the Agreement and Plan of
         Merger,  dated as of  January 8, 1998,  among  AT&T  Corp.,  a New York
         corporation,  TA Merger  Corp.,  a  Delaware  corporation  and a direct
         wholly owned  subsidiary  of AT&T Corp.,  and the Company,  in the form
         attached to this consent (the  "Merger  Agreement"),  be, and it hereby
         is, consented to, approved and adopted in all respects.


This Consent may be executed in one or more counterparts,  all of which shall be
considered one and the same instrument.


TCI TELEPORT, INC.           1,011,528 shares Class A Common Stock
                            48,779,388 shares Class B Common Stock




By:_____________
Name:
Title:

Date:___________


<PAGE>


COX TELEPORT
PARTNERS, INC.              No shares Class A Common Stock
                            39,087,594 shares Class B Common Stock





By:_____________
Name:
Title:

Date:___________



COMCAST TELEPORT, INC.      No shares Class A Common Stock
                            25,438,036 shares Class B Common Stock




By:_____________
Name:
Title:

Date:___________




COMCAST COMMUNICATIONS
PROPERTIES, INC.            No shares Class A Common Stock
                            184,022 shares Class B Common Stock




By:_____________
Name:
Title:

Date:___________




                          REGISTRATION RIGHTS AGREEMENT


                  REGISTRATION  RIGHTS  AGREEMENT,  dated as of January 8, 1998,
between AT&T Corp., a New York corporation (the "Company"), on the one hand, and
Tele-Communications,  Inc., a Delaware  corporation ("TCI"), Cox Communications,
Inc., a Delaware  corporation  ("Cox") and Comcast  Corporation,  a Pennsylvania
corporation  ("Comcast")  (TCI,  Cox  and  Comcast,   collectively,  the  "Cable
Stockholders"), on the other hand.

                  WHEREAS, pursuant to an Agreement and Plan of Merger, dated as
of January 8, 1998 (the "Merger Agreement"), by and among the Company, TA Merger
Corp., a Delaware  corporation  ("Merger Sub") and a wholly owned  subsidiary of
the Company,  and  Teleport  Communications  Group Inc., a Delaware  corporation
("Teleport"),  Merger Sub has agreed to merge (the "Merger") into Teleport,  and
pursuant  thereto  shares of Class A Common  Stock,  par value $.01 of  Teleport
("Teleport  Class A Stock"),  and shares of Class B Common Stock, par value $.01
of Teleport  ("Teleport Class B Stock"),  held by the Cable Stockholders will be
converted into shares of Common Stock,  par value $1.00 per share of the Company
("Common Stock"); and

                  WHEREAS, pursuant to a Voting Agreement dated as of January 8,
1998,  by and among the  Company  and the Cable  Stockholders,  the  Company has
agreed to enter into this Agreement to provide  certain  registration  rights to
the Cable  Stockholders,  effective as of the effective  time of the Merger (the
"Effective Time"),  with respect to the shares of Common Stock to be received by
them in the Merger.

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
mutual agreements set forth herein, the parties agree as follows:

                  1. Definitions.  (a) As used herein, the following terms shall
have the following meanings:

                  (i) Registrable Securities:  (A) the shares of Common Stock to
be acquired by the Cable  Stockholders  at the  Effective  Time  pursuant to the
Merger  Agreement,  (B) any  securities  of the Company  issued or issuable with
respect to any  Common  Stock  referred  to in  subdivision  (A) by way of stock
dividend  or  stock  split  or in  connection  with  a  combination  of  shares,
recapitalization,  merger,  consolidation or other  reorganization or otherwise,
and (C) subject to Section 2(b), any securities of a Cable Stockholder the value
of which  relates to or is based upon the  Registrable  Securities or securities
which are exchangeable for or convertible  into the Registrable  Securities,  to
the extent such  securities  require  registration by the Company in addition to
registration by the issuer thereof. As to any particular Registrable Securities,
once issued such securities shall cease to be Registrable  Securities when (x) a
registration  statement with respect to the sale of such  securities  shall have
become  effective under the Securities Act and such  securities  shall have been
disposed of in accordance with such registration statement,  (y) they shall have
been distributed to the public pursuant to Rule 144 or Rule 145 (or any suc-


<PAGE>


cessor  provision)  under the Securities Act or (z) they shall have ceased to be
outstanding.

                  (ii)  Registration  Expenses:  all  expenses  incident  to the
Company's performance of or compliance with this Agreement,  including,  without
limitation,  all  registration,  filing and National  Association  of Securities
Dealers,  Inc. fees, all fees and expenses of complying with  securities or blue
sky laws, all word processing,  duplicating and printing expenses, messenger and
delivery expenses,  the fees and disbursements of counsel for the Company and of
its independent public accountants, including the expenses of any special audits
or "comfort" letters required by or incident to such performance and compliance,
premiums  and other  costs of  policies  of  insurance  obtained  by the Company
against liabilities arising out of the public offering of Registrable Securities
being registered and (except in the case of Registrable  Securities  referred to
in Section  1(a)(i)(C)) any fees and  disbursements of underwriters  customarily
paid by issuers, but excluding fees and disbursements of counsel retained by any
of the Cable  Stockholders,  premiums  and other costs of policies of  insurance
obtained by the Cable Stockholders against liabilities arising out of the public
offering  of  the  Registrable   Securities  being  registered,   any  fees  and
disbursements of underwriters  customarily paid by sellers of securities who are
not the issuers of such securities,  all underwriting  discounts and commissions
and transfer taxes, if any, relating to Registrable  Securities and, in the case
of  Registrable  Securities  referred  to  in  Section  1(a)(i)(C),   any  other
registration  expenses  incident to the registration of the securities issued by
the Cable  Stockholder  as  distinct  from the  registration  of the  underlying
Registrable Securities.

                  (b)  Capitalized  terms used herein but not otherwise  defined
herein shall have the same meaning as in the Merger Agreement.

                  2.  Registration  on Request.  (a) Request.  During the period
commencing on the  Effective  Time and ending on the second  anniversary  of the
Effective Time (the  "Registration  Period"),  each Cable Stockholder shall have
the right upon written  request (a "Request") to request that the Company effect
the  registration  under the Securities Act of all or a part of the  Registrable
Securities  then owned by such Cable  Stockholder(s)  (but in any event not less
than an aggregate of 5,000,000  shares of Common  Stock,  as adjusted to reflect
any stock  splits,  combinations  of  shares,  reclassifications  or  comparable
transactions,  or such lesser number of shares as shall then  constitute  all of
the  Registrable  Securities then owned by such Cable  Stockholders  taking into
account all Registrable  Securities to be included in such  registration).  Upon
receipt of any such Request,  the Company will provide notice of such Request in
accordance  with  Section  8 (the  "Registration  Notice")  to each of the Cable
Stockholders  not included in such Request and will use all  reasonable  efforts
(subject  to  Section  4(b)) to  effect  such  registration  of the  Registrable
Securities which the Company has been so requested to register in the Request or
by any other Cable Stockholder within 15 days after delivery of the Registration
Notice (the Cable  Stockholders  requesting  registration  shall collectively be
referred to as the "Participating Cable  Stockholders").  Each Cable Stockholder
shall be entitled to two Requests  during the  Registration  Period  pursuant to
this Section 2, provided that,  regardless of whether any securities are offered
or sold  pursuant  thereto  (other than as a result of any action by the Company
pursuant to Section 4(b)),  no more than one Request shall be made by each Cable
Stockholder during the first twelve month period of the Registration  Period and
no more than one

                                      -2-
<PAGE>


Request  shall be made by each Cable  Stockholder  during the  remainder  of the
Registration  Period.  (For the avoidance of doubt,  no more than a total of six
Requests may be made hereunder.)

                  The  Company  may  include  in  any  such  registration  other
securities  for sale for its own account or for the account of any other Person;
provided that, if the managing underwriter for the offering shall determine that
the number of shares proposed to be offered in such offering would be reasonably
likely to adversely affect such offering,  then the securities to be sold by the
Cable Stockholders shall be included in such registration  before any securities
proposed  to be sold for the  account  of the  Company  or any other  Person and
provided  further that the Cable  Stockholders  agree that any  reduction in the
number of  securities  to be offered by the Cable  Stockholders  pursuant to any
Request shall be on a pro rata basis except that the  securities  offered by the
Cable Stockholder  initiating such Request shall not be reduced to less than 50%
of such  securities  included in the initial Request unless no securities of any
other Cable Stockholder are included therein.  The Cable Stockholder making such
initial  Request  shall be  responsible  for any  calculations  relating  to the
foregoing and shall set forth such calculations in a certificate to be delivered
to the Company, on which certificate the Company shall be entitled to rely.

                  (b) Registration  Statement Form. The Company shall effect any
registration  requested  under this  Section 2 by the  filing of a  registration
statement on such form as the Company may  determine;  provided that the Company
shall not be  obligated  to register any  securities  on a "shelf"  registration
statement  pursuant  to Rule 415  under  the  Securities  Act (or any  successor
provisions  of such Act) or otherwise to register  securities on a continuous or
delayed basis. In the case of the Registrable  Securities referred to in Section
1(a)(i)(C), the Company's obligation to effect any such registration shall apply
only to the Registrable Securities underlying the securities to be issued by any
Cable Stockholder, and the applicable Cable Stockholder shall be responsible for
the  separate  registration  of  the  securities  to be  issued  by  such  Cable
Stockholder.

                  (c) Expenses. The Registration Expenses in connection with any
registration  which may be requested  under this Section 2 shall be borne by the
Company. The Participating Cable Stockholders shall bear the expense of fees and
disbursements  of counsel  retained  by the  Participating  Cable  Stockholders,
premiums and other costs of policies of insurance  obtained by the Participating
Cable Stockholders against liabilities arising out of the public offering of the
Registrable Securities,  any fees and disbursements of underwriters  customarily
paid by sellers of securities,  all  underwriting  discounts and commissions and
transfer  taxes,  if any,  relating  to  Registrable  Securities  and any  other
expenses that do not constitute Registration Expenses.

                  (d)   Selection   of   Underwriters.   One  co-lead   managing
underwriter  for any  registration  requested  under this  Section 2 effected by
means of a firm commitment  underwriting  shall be selected by the Company,  and
shall be reasonably acceptable to the Participating Cable Stockholders,  and the
other co-lead managing  underwriter shall be selected by the Participating Cable
Stockholders and shall be reasonably  acceptable to the Company.  Any additional
co-managing underwriters shall be selected by the Company.

                                      -3-
<PAGE>

                  3. Registration Procedures.  If the Company is required to use
all reasonable  efforts to effect the  registration  of  Registrable  Securities
under  the  Securities  Act as  provided  in  Section  2,  the  Company  will as
expeditiously as possible:

                   (i)  prepare  and  (within  30 days  after the  receipt  of a
         Request)  file with the SEC the  requisite  registration  statement  to
         effect such  registration and use all reasonable  efforts to cause such
         registration statement to become effective, provided that before filing
         such registration statement or any amendments thereto, the Company will
         furnish to the counsel selected by the Participating Cable Stockholders
         copies of all such documents proposed to be filed, which documents will
         be  subject  to the review of such  counsel  before any such  filing is
         made, and the Company will comply with any  reasonable  request made by
         such  counsel to make  changes  in any  information  contained  in such
         documents relating to the Participating Cable Stockholders;

                  (ii)  prepare  and  file  with  the SEC  such  amendments  and
         supplements to such  registration  statement and the prospectus used in
         connection  therewith as may be necessary to maintain the effectiveness
         of  such  registration  and  to  comply  with  the  provisions  of  the
         Securities  Act  with  respect  to the  disposition  of all  securities
         covered by such  registration  statement  until the earliest of (A) the
         termination of this Agreement  pursuant to Section 16, (B) such time as
         all of such  securities have been disposed of and (C) the date which is
         60 days after the date of initial  effectiveness  of such  registration
         statement;

                 (iii)  furnish to the  Participating  Cable  Stockholders  such
         number of conformed copies of such  registration  statement and of each
         such  amendment  and  supplement  thereto (in each case  including  all
         exhibits),  such number of copies of the  prospectus  contained in such
         registration  statements  and any  supplements  thereto  and any  other
         prospectus filed under Rule 424 under the Securities Act, in conformity
         with the  requirements of the Securities Act, and such other documents,
         including  documents  incorporated by reference,  as the  Participating
         Cable Stockholders may reasonably request;

                  (iv) use all  reasonable  efforts to  register  or qualify all
         Registrable   Securities   registered  pursuant  to  such  registration
         statement  under  such  other  securities  or  blue  sky  laws  of such
         jurisdictions as the Participating  Cable Stockholders shall reasonably
         request,  to keep such  registration or  qualification in effect for so
         long as such  registration  statement  remains in effect,  and take any
         other action which may be  reasonably  necessary or advisable to enable
         the Participating  Cable  Stockholders to consummate the disposition in
         such  jurisdictions of the securities owned by the Participating  Cable
         Stockholders, except that the Company shall not for any such purpose be
         required to qualify  generally to do business as a foreign  corporation
         in any  jurisdiction  wherein it would not but for the  requirements of
         this subdivision (iv) be obligated to be so qualified, to be subject to
         taxation  or to  consent  to  general  service  of  process in any such
         jurisdiction;

                   (v) use all  reasonable  efforts  to  cause  all  Registrable
         Securities covered by such registration statement to be registered with
         or approved by such other governmental

                                      -4-
<PAGE>


         agencies or authorities as may be  necessary  to  enable  the
         Participating   Cable  Stockholders  to consummate the disposition of
         such Registrable Securities;

                  (vi) if such  registration  includes  an  underwritten  public
         offering,  furnish to the  Participating  Cable  Stockholders  a signed
         counterpart, addressed to the Participating Cable Stockholders (and the
         underwriters),  of (x) an opinion of counsel for the Company, dated the
         date  of the  closing  under  the  underwriting  agreement,  and  (y) a
         "comfort  letter",  dated  the  effective  date  of  such  registration
         statement (and a supplement to such "comfort  letter" dated the date of
         the  closing  under  the   underwriting   agreement),   signed  by  the
         independent   public  accountants  who  have  certified  the  Company's
         financial statements included in such registration statement,  covering
         substantially  the  same  matters  with  respect  to such  registration
         statement (and the prospectus included therein) and, in the case of the
         accountants'  letter,  with respect to events subsequent to the date of
         such financial  statements,  as are customarily  covered in opinions of
         issuer's  counsel  and  in  accountants'   letters   delivered  to  the
         underwriters in underwritten public offerings of securities and, in the
         case of the accountants'  letter,  such other financial matters, as the
         Participating  Cable  Stockholders  (or the  underwriters,  if any) may
         reasonably request;

                  (vii) promptly notify the Participating  Cable Stockholders at
         any time when the Company  becomes aware that a prospectus  relating to
         Registrable Securities is required to be delivered under the Securities
         Act, of the happening of any event as a result of which the  prospectus
         included in such registration statement, as then in effect, includes an
         untrue statement of a material fact or omits to state any material fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein not  misleading in the light of the  circumstances  under which
         they  were  made,  and  at  the  request  of  the  Participating  Cable
         Stockholders  (and subject to Section  4(b)(ii))  promptly  prepare and
         furnish to the Participating  Cable Stockholders a reasonable number of
         copies of a supplement to or an amendment of such  prospectus as may be
         necessary so that,  as thereafter  delivered to the  purchasers of such
         securities,  such prospectus shall not include an untrue statement of a
         - material  fact or omit to state a material fact required to be stated
         therein or necessary to make the  statements  therein not misleading in
         the light of the circumstances under which they were made;

                  (viii) otherwise use all reasonable efforts to comply with the
         Securities Act and the Exchange Act and with all  applicable  rules and
         regulations of the SEC, and make available to its security holders,  as
         soon as  reasonably  practicable,  an earnings  statement  covering the
         period of at least twelve  months,  but not more than eighteen  months,
         beginning  with the first full calendar  month after the effective date
         of such registration statement,  which earnings statement shall satisfy
         the provisions of Section 11(a) of the Securities Act, and not file any
         amendment or supplement to such registration statement or prospectus to
         which  the  Participating  Cable  Stockholders  shall  have  reasonably
         objected on the grounds  that such  amendment  or  supplement  does not
         comply  in  all -  material  respects  with  the  requirements  of  the
         Securities Act;

                  (ix)  provide  a  transfer   agent  and   registrar   for  all
         Registrable Securities covered

                                      -5-
<PAGE>


         by such registration statement not later than the effective date of
         such registration statement; and

                   (x) use all  reasonable  efforts  to list  all  Common  Stock
         covered by such  registration  statement on any securities  exchange on
         which any of the Common Stock is then listed.


In the case of any underwritten  offering  involving at least $1 billion in fair
market  value of shares of Common  Stock (as  estimated  by the  Company in good
faith based on the market value of the Shares at the time of the  Request),  the
Company will  participate in customary  "roadshow"  presentations  as reasonably
requested by the co-lead  managing  underwriters;  provided however that Company
shall not be required so to participate more than one time during the first year
of the  Registration  Period or more than one time during the  remainder  of the
term  hereof.  In any  event,  the  identity  of  the  officers  of the  Company
participating  therein  (which need not be senior  executive  officers)  and the
number of cities visited shall be reasonably acceptable to the Company.

The  Company may require the  Participating  Cable  Stockholders  to furnish the
Company such information  regarding the Participating Cable Stockholders and the
distribution  of such securities as the Company may from time to time reasonably
request in writing for the purpose of  registering  the  Registrable  Securities
pursuant to a Request hereunder. With respect to Registrable Securities referred
to in Section  1(a)(i)(C),  the requirements of this Section 3 shall relate only
to the  Registrable  Securities  underlying  the  securities to be issued by the
applicable Cable Stockholder.

                  Each  Cable   Stockholder   agrees  by   acquisition   of  the
Registrable  Securities  that upon receipt of any notice from the Company of the
happening  of any  event  of the kind  described  in  subdivision  (vii) of this
Section 3, such Participating  Cable Stockholder will forthwith  discontinue its
disposition of Registrable  Securities  pursuant to the  registration  statement
relating  to  such  Registrable   Securities  until  the   Participating   Cable
Stockholder's  receipt of the copies of the  supplemented or amended  prospectus
contemplated  by subdivision  (vii) of this Section 3 and, if so directed by the
Company,  will deliver to the Company (at the Company's expense) all copies then
in the Participating Cable Stockholder's  possession,  other than permanent file
copies, of the prospectus relating to such Registrable Securities current at the
time of receipt of such notice.  Any delay pursuant to this paragraph shall toll
on a day for day basis the  running of the 60 day period  referred to in Section
3(ii) hereof.

                  4. (a) Requested Underwritten  Offerings.  If requested by the
underwriters  for any  underwritten  offering of  Registrable  Securities by the
Participating  Cable  Stockholders  under a registration  requested  pursuant to
Section 2, the Company will enter into a customary  underwriting  agreement with
such  underwriters  for such  offering,  to  contain  such  representations  and
warranties by the Company and such other terms as are  customarily  contained in
agreements  of this type,  including,  without  limitation,  indemnities  to the
effect  and to the  extent  provided  in  Section  6.  The  Participating  Cable
Stockholders shall be a party to such underwriting agreement

                                      -6-
<PAGE>


and may, at their  option,  require that any or all of the  representations  and
warranties  by, and the other  agreements on the part of, the Company to and for
the  benefit of such  underwriters  shall also be made to and for the benefit of
the  Participating  Cable  Stockholders  and that  any or all of the  conditions
precedent  to the  obligations  of such  underwriters  under  such  underwriting
agreement be conditions  precedent to the obligations of the Participating Cable
Stockholders. The Participating Cable Stockholders shall not be required to make
any  representations  or  warranties  to or  agreement  with the  Company or the
underwriters other than representations,  warranties or agreements regarding the
Participating Cable Stockholders,  their ownership of the Registrable Securities
and their intended method of distribution and any other representation  required
by law. In the case of Registrable Securities referred to in Section 1(a)(i)(C),
the foregoing  shall apply only to the  Registrable  Securities  underlying  the
securities  to be  issued  by a  Cable  Stockholder,  and the  applicable  Cable
Stockholder will be responsible for the underwriting  agreement  relating to the
securities to be issued by it and all  obligations  and  indemnities  thereunder
applicable to it as the issuer of such securities.

                  (b)   Holdback   Agreement;   Postponement.   (i)  The   Cable
Stockholders agree by acquisition of the Registrable Securities,  if so required
by the managing  underwriter,  not to effect any public sale or  distribution of
such  securities  during  the  seven  days  prior to and the 90 days  after  any
underwritten  registration by the Company (either for its own account or for the
benefit of the holders of any  securities  of the Company) has become  effective
(or such period of time shorter than 90 days that is sufficient and appropriate,
in the opinion of the  managing  underwriter,  in order to complete the sale and
distribution of securities included in such registration)  provided however that
the Company shall not be entitled to require that any Cable Stockholder agree to
the restriction in this Section 4(b)(i) for more than an aggregate of 90 days in
the first year of the  Registration  Period or for more than 90 days  during the
remainder of the term of the Registration Period.

                  (ii)  The  Company  may  postpone  any  registration  which is
requested  pursuant to Section 2 or delivery of a prospectus  or  supplement  or
amendment  pursuant  to  Section  3(vii)  if it  determines  that in view of the
advisability of deferring public disclosure of material  corporate  developments
or other information, the disclosures required to be made pursuant thereto would
not be in the best  interests  of the  Company  at that  time.  In the event the
Company  makes  any  such  election,  each  Cable  Stockholder  agrees  to  keep
confidential  the fact of such  election  and any  information  provided  by the
Company in connection therewith. No single postponement pursuant to this Section
4(b)(ii)  of any  registration  which is  requested  pursuant  to  Section  2 or
delivery of a prospectus or supplement or amendment  pursuant to Section  3(vii)
shall exceed 90 days and all such postponements shall not exceed 180 days in the
aggregate.

                  5. Preparation of Registration  Statement.  In connection with
the  preparation and filing of the  registration  statement under the Securities
Act,  the  Company  will  give  the  Participating  Cable  Stockholders,   their
underwriters,   if  any,  and  their  respective  counsel,  the  opportunity  to
participate in the preparation of such registration  statement,  each prospectus
included therein or filed with the SEC, and each amendment thereof or supplement
thereto.  Such opportunity to participate  shall include  reasonable  access for
purposes of due diligence,  subject to the execution and delivery of appropriate
confidentiality agreements.

                                      -7-
<PAGE>


                  6. Indemnification. (a) Indemnification by the Company. In the
event of any registration of any Registrable Securities of the Company under the
Securities  Act, the Company will, and hereby does,  indemnify and hold harmless
the Participating Cable  Stockholders,  each other Person who participates as an
underwriter in the offering or sale of such securities and each other Person who
controls any such underwriter  within the meaning of the Securities Act, against
any losses,  claims,  damages or  liabilities,  joint or  several,  to which the
Participating  Cable  Stockholders or any such underwriter or controlling person
may  become  subject  under the  Securities  Act or  otherwise,  insofar as such
losses,  claims,  damages or  liabilities  (or actions or  proceedings,  whether
commenced or threatened,  in respect thereof) arise out of or are based upon any
untrue  statement or alleged untrue  statement of any material fact contained in
the  registration   statement  under  which  such  Registrable  Securities  were
registered  under  the  Securities  Act,  any  preliminary   prospectus,   final
prospectus  or  summary  prospectus  contained  therein,  or  any  amendment  or
supplement  thereto,  or any  omission or alleged  omission  to state  therein a
material fact required to be stated  therein or necessary to make the statements
therein not misleading,  and the Company will reimburse the Participating  Cable
Stockholders and each such  underwriter and controlling  person for any legal or
any other expenses  reasonably incurred by them in connection with investigating
or defending any such loss, claim,  liability,  action or proceedings;  provided
that the  Company  shall not be liable in any such case to the  extent  that any
such loss, claim, damage, liability (or action or proceeding in respect thereof)
or expense  arises out of or is based  upon (i) an untrue  statement  or alleged
untrue  statement  or omission  or alleged  omission  made in such  registration
statement,   any  such  preliminary   prospectus,   final  prospectus,   summary
prospectus,  amendment or supplement  in reliance  upon and in  conformity  with
written   information   furnished  to  the  Company  by  a  Participating  Cable
Stockholder for use in the preparation  thereof,  (ii) the use of any prospectus
after such time as the  obligation of the Company to keep the same effective and
current has expired,  or (iii) the use of any prospectus  after such time as the
Company has advised the  Participating  Cable  Stockholder  that the filing of a
post-effective  amendment  or  supplement  thereto  is  required,   except  such
prospectus as so amended or supplemented,  and provided further that the Company
shall not be liable to any  Person who  participates  as an  underwriter  in the
offering or sale of  Registrable  Securities  or any other  Person,  if any, who
controls such  underwriter  within the meaning of the Securities Act in any such
case to the extent that any such loss,  claim,  damage,  liability (or action or
proceeding in respect thereof) or expense arises out of the matters described in
(i), (ii) or (iii) above or such Person's  failure to send or give a copy of the
final  prospectus or supplement to the Persons  asserting an untrue statement or
alleged  untrue  statement  or omission  or alleged  omission at or prior to the
written  confirmation  of the sale of  Registrable  Securities to such Person if
such statement or omission was corrected in such final prospectus or supplement.
Such  indemnity  shall  remain  in  full  force  and  effect  regardless  of any
investigation  made by or on behalf of the Participating  Cable  Stockholders or
any such  underwriter  or  controlling  person and shall survive the transfer of
such  securities by the  Participating  Cable  Stockholders.  In the case of any
Registrable  Securities  referred  to  in  Section  1(a)(i)(C),   the  Company's
indemnity hereunder shall relate only to the Registrable  Securities  underlying
the  securities  to be  issued by a Cable  Stockholder,  and the  Company  shall
otherwise have no indemnity obligations with respect to the securities issued by
the applicable Cable Stockholder or the registration thereof.

                                      -8-
<PAGE>


                  (b)  Indemnification by the Participating  Cable Stockholders.
The Company may require, as a condition to including any Registrable  Securities
of a  Participating  Cable  Stockholder  in  any  registration  statement  filed
pursuant  to Section 2, that the  Company  shall have  received  an  undertaking
reasonably  satisfactory  to it from such  Participating  Cable  Stockholder  to
indemnify  and hold  harmless  (in the same manner and to the same extent as set
forth  in  subdivision   (a)  of  this  Section  6)  the  Company,   each  other
Participating Cable Stockholder, each director and officer of the Company and of
each other Participating  Cable Stockholder,  and each other Person, if any, who
controls the Company or any other  Participating  Cable Stockholder,  within the
meaning of the Securities Act, with respect to any untrue - statement or alleged
untrue  statement of a material fact in or omission or alleged omission to state
a material fact from such registration  statement,  any preliminary  prospectus,
final prospectus or summary prospectus  contained  therein,  or any amendment or
supplement  thereto,  if such untrue  statement or alleged  untrue  statement or
omission or alleged  omission was made in reliance upon and in  conformity  with
written  information  furnished  to the  Company  by  such  Participating  Cable
Stockholder  for  use  in  the  preparation  of  such  registration   statement,
preliminary  prospectus,  final  prospectus,  summary  prospectus,  amendment or
supplement provided,  however,  that a Participating Cable Stockholder shall not
be liable to the extent that the losses, liabilities or expenses arise out of or
are  based  upon  (i) the use by the  Company  or  another  Participating  Cable
Stockholder of any  prospectus  after such time as the obligation of the Company
to keep  the same  effective  and  current  has  expired  or (ii) the use by the
Company or another  Participating Cable Stockholder of any prospectus after such
time as such  Participating  Cable  Stockholder has advised the Company that the
filing of a  post-effective  amendment or  supplement  thereto is required  with
respect  to  any  information  contained  in  such  prospectus  concerning  such
Participating   Cable   Holder,   except  such   prospectus  as  so  amended  or
supplemented. Such indemnity shall remain in full force and effect regardless of
any investigation made by or on behalf of the Company,  each other Participating
Cable  Stockholder,  or any such director,  officer,  or controlling  person and
shall  survive  the  transfer  of such  securities  by the  Participating  Cable
Stockholders.

                  (c)  Notices  of Claims,  etc.  Promptly  after  receipt by an
indemnified  party of notice of the  commencement  of any  action or  proceeding
involving a claim referred to in the preceding  subdivisions  of this Section 6,
such indemnified party will, if a claim in respect thereof is to be made against
an indemnifying  party, give written notice to the latter of the commencement of
such action,  provided that the failure of any indemnified  party to give notice
as provided herein shall not relieve the  indemnifying  party of its obligations
under the  preceding  subdivisions  of this Section 6, except to the extent that
the indemnifying party is actually prejudiced by such failure to give notice. In
case any such action is brought  against an  indemnified  party,  unless in such
indemnified  party's  reasonable  judgment a conflict of interest  between  such
indemnified  and  indemnifying  parties may exist in respect of such claim,  the
indemnifying party shall be entitled to participate in and to assume the defense
thereof,  jointly with any other  indemnifying  party similarly  notified to the
extent  that  it  may  wish,  with  counsel  reasonably   satisfactory  to  such
indemnified  party,  and  after  notice  from  the  indemnifying  party  to such
indemnified  party  of its  election  so to  assume  the  defense  thereof,  the
indemnifying party shall not be liable to the indemnified party for any legal or
other  expenses  subsequently  incurred  by the  latter in  connection  with the
defense thereof other than reasonable costs of investigation.

                                      -9-
<PAGE>


                  (d) Other  Indemnification.  Indemnification  similar  to that
specified in the  preceding  subdivisions  of this  Section 6 (with  appropriate
modifications)  shall  be  given  by the  Company  and the  Participating  Cable
Stockholders with respect to any required registration or other qualification of
securities  under  any  Federal  or  state  law or  regulation  of  governmental
authority other than the Securities Act.

                  (e) Indemnification  Payments. The indemnification required by
this Section 6 shall be made by periodic  payments of the amount  thereof during
the course of the  investigation  or defense,  as and when bills are received or
expense, loss, damage or liability is incurred.

                  (f) Contribution. If for any reason the foregoing indemnity is
unavailable,  or is insufficient to hold harmless an indemnified party, then the
indemnifying  party  shall  contribute  to the  amount  paid or  payable  by the
indemnified party as a result of the expense, loss, damage or liability,  (i) in
such  proportion  as is  appropriate  to  reflect  the  relative  fault  of  the
indemnifying  party  on the one  hand and the  indemnified  party  on the  other
(determined  by reference to, among other things,  whether the untrue or alleged
untrue statement of a material fact or omission relates to information  supplied
by the  indemnifying  party or the indemnified  party and the parties'  relative
intent,  knowledge,  access to information and opportunity to correct or prevent
such untrue statement or omission), or (ii) if the allocation provided by clause
(i) above is not  permitted  by  applicable  law or provides a lesser sum to the
indemnified party than the amount hereinafter  calculated,  in the proportion as
is appropriate to reflect not only the relative fault of the indemnifying  party
and the  indemnified  party,  but also the  relative  benefits  received  by the
indemnifying  party on the one hand and the  indemnified  party on the other, as
well as any other relevant equitable considerations. No indemnified party guilty
of  fraudulent  misrepresentation  (within the  meaning of Section  11(f) of the
Securities Act) shall be entitled to contribution  from any  indemnifying  party
who was not guilty of such fraudulent misrepresentation.

                  (g)  Section  1(a)(i)(C)   Offerings.   In  the  case  of  any
registration of Registrable Securities referred to in Section 1(a)(i)(C) hereof,
it shall be a  condition  to the  Company's  obligation  to  proceed  under this
Agreement that the  appropriate  Cable  Stockholder  shall provide,  in a manner
reasonably satisfactory to the Company, indemnification,  contribution and other
rights in favor of the  Company,  each  director  and officer of the Company and
each other  Person,  if any, who controls the Company  within the meaning of the
Securities  Act with respect to the securities  issued by the  applicable  Cable
Stockholder  and the  registration  thereof,  in the same manner and to the same
extent as those rights provided to the Participating  Cable  Stockholders in the
case of registrations of other Registrable Securities hereunder.

                  7.  Covenants  Relating  to Rule  144/145.  The  Company  will
prepare  and file in a timely  manner,  information,  documents  and  reports in
compliance  with the Exchange Act so as to comply with the  requirements of such
Act and the rules and regulations thereunder and will, at its expense, forthwith
upon the request of the Cable Stockholders,  deliver to the Cable Stockholders a
certificate,  signed by the Company's principal  financial officer,  stating (a)
the Company's name,  address and telephone number (including area code), (b) the
Company's Internal Revenue Service  identification number, (c) the Company's SEC
file number, (d) the number


                                      -10-
<PAGE>


of shares of Common  Stock  outstanding  as shown by the most  recent  report or
statement  published by the  Company,  and (e) whether the Company has filed the
reports  required to be filed under the Exchange Act for a period of at least 90
days prior to the date of such  certificate  and in addition  has filed the most
recent annual report required to be filed thereunder. If at any time the Company
is not required to file reports in compliance  with either Section 13 or Section
15(d) of the Exchange Act, the Company at its expense will  forthwith,  upon the
written  request of the Cable  Stockholders,  make  available  adequate  current
public  information  with respect to the Company within the meaning of paragraph
(c)(2) of Rule 144 of the General Rules and  Regulations  promulgated  under the
Securities Act.

                  8.  Notices,  etc.  All  notices,  requests,  demands or other
communications  required by or otherwise with respect to this Agreement shall be
in  writing  and  shall be deemed  to have  been  duly  given to any party  when
delivered  personally  (by courier  service or  otherwise),  when  delivered  by
telecopy if receipt is  confirmed by return  telecopy,  or five days after being
mailed by registered or certified mail, return receipt  requested,  in each case
to the applicable addresses set forth below:



                  If to TCI:

                  Tele-Communications, Inc.
                  5619 DTC Parkway
                  Englewood, CO 80111-3000
                  Attention:  Leo J. Hendery, Jr.
                  Facsimile:  (303) 488-3200

                  with a copy to:

                  Baker & Botts, L.L.P.
                  599 Lexington Avenue
                  29th Floor
                  New York, New York 10022-6030
                  Attention:  Elizabeth M. Markowski, Esq.
                  Facsimile:  (212) 705-5125

                  If to Cox:

                  Cox Enterprises, Inc.
                  1400 Lake Hearn Drive
                  Atlanta, GA 30319
                  Attention:  David M. Woodrow
                  Facsimile:  (404) 847-6029

                  with a copy to:

                                      -11-
<PAGE>

                  Dow, Lohnes & Albertson
                  1200 New Hampshire Avenue, N.W.
                  Suite 800
                  Washington, D.C. 20036
                  Attention:  Stuart A. Sheldon, Esq.
                  Facsimile:  (202) 776-2222

                  If to Comcast:

                  Comcast Corporation
                  1500 Market Street
                  Philadelphia, PA 19102
                  Attention:  General Counsel
                  Facsimile:  (215) 981-7794

                  with a copy to:

                  Davis Polk & Wardwell
                  450 Lexington Avenue
                  New York, New York 10017
                  Attention:  Dennis Hersch, Esq.
                  Facsimile:  (212) 450-4800


                  If to the Company:

                  AT&T Corp.
                  295 North Maple Avenue
                  Basking Ridge, NJ 07920
                  Attention:  Vice President-Law
                                and Corporate Secretary
                  Facsimile:  (908) 221-6618

                  with a copy to:

                  Wachtell, Lipton, Rosen & Katz
                  51 W. 52nd Street
                  New York, New York  10019
                  Attention:  Richard D. Katcher, Esq.
                            Steven A. Rosenblum, Esq.
                            Facsimile: (212) 403-2000

or to such other address as such party shall have  designated by notice so given
to each other party.

                                      -12-
<PAGE>


                  9.  Amendments,  Waivers,  etc.  This  Agreement  may  not  be
amended,  changed,  supplemented,  waived or  otherwise  modified or  terminated
except  by an  instrument  in  writing  -  signed  by  the  party  against  whom
enforcement is sought or as expressly provided in Section 16. The failure of any
party to exercise any right,  power or remedy  provided  under this Agreement or
otherwise  available  in respect  hereof at law or in equity,  or to insist upon
compliance by any other party with its obligations hereunder,  and any custom or
practice of the parties at variance with the terms hereof,  shall not constitute
a waiver by such party of its right to exercise any such or other  right,  power
or remedy or to demand such compliance.

                  10.  Entire  Agreement.  This  Agreement  embodies  the entire
agreement and  understanding  between the parties relating to the subject matter
hereof and supersedes all prior - agreements and understandings relating to such
subject  matter,  including  the  provisions  of  Section 4 of the  Amended  and
Restated  Stockholders'  Agreement of Teleport  dated as of June 26,  1996.  The
provisions of this Agreement do not conflict with any other registration  rights
agreement to which Parent is a party (it being  understood  that Parent makes no
representation  with respect to any registration rights or similar agreements to
which Teleport or any of its Subsidiaries is subject). After the Effective Time,
none of Teleport,  Parent or any of their  respective  Affiliates  will have any
other registration rights obligations to any of the Cable Stockholders or any of
their Affiliates.

                  11.  Severability.  If  any  term  of  this  Agreement  or the
application  thereof  to any  party or  circumstance  shall be held  invalid  or
unenforceable to any extent, the remainder of this Agreement and the application
of such term to the other parties or circumstances shall not be affected thereby
and shall be enforced to the greatest extent permitted by applicable law.

                  12.  Successors and Assigns.  This Agreement  shall be binding
upon and shall  inure to the  benefit of and be  enforceable  by the parties and
their  respective  successors and assigns;  provided that neither the rights nor
the  obligations  of any party may be  assigned or  delegated  without the prior
written consent of the other parties.

                  13.  Governing Law. This Agreement and all disputes  hereunder
shall be governed by and construed  and enforced in accordance  with the laws of
the State of New York.

                  14. Name,  Captions.  The name assigned this Agreement and the
section captions used herein are for convenience of reference only and shall not
affect the interpretation or construction hereof.

                  15. Counterparts. This Agreement may be executed in any number
of  counterparts,  each of which shall be deemed to be an  original,  but all of
which together shall constitute one instrument.  Each counterpart may consist of
a number of copies each signed by less than all, but together signed by all, the
parties hereto.

                  16.  Termination.  This Agreement shall terminate and be of no
further force and effect upon the later of the  expiration  of the  Registration
Period and the tenth day after

                                      -13-
<PAGE>


effectiveness  of a  registration  statement  filed  pursuant to a Request  made
during the Registration Period; provided that,  notwithstanding this Section 16,
the provisions of Section 6 shall survive the termination of this Agreement.



<PAGE>


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

                                           AT&T CORP.



                                           By:    /s/ John D. Zeglis
                                           -----------------------------------
                                           Name:  John D. Zeglis
                                           Title: President


                                           TELE-COMMUNICATIONS, INC.



                                           By:    /s/ Bernard W. Schotters
                                           -----------------------------------
                                           Name:  Bernard W. Schotters
                                           Title: Senior Vice President
                                                    Finance & Treasurer


                                           COX COMMUNICATIONS, INC.



                                           By:    /s/ Jimmy W. Hayes
                                           -----------------------------------
                                           Name:  Jimmy W. Hayes
                                           Title: Senior Vice President of
                                                    Finance; Chief Financial
                                                    Officer


                                           COMCAST CORPORATION



                                           By:    /s/ Lawrence S. Smith
                                           -----------------------------------
                                           Name:  Lawrence S. Smith
                                           Title: Executive Vice President



                                                                      Exhibit 99


                AT&T AND TELEPORT COMMUNICATIONS GROUP TO MERGE;
                TCG TO BECOME CORE OF AT&T's LOCAL SERVICES UNIT

 FOR IMMEDIATE RELEASE THURSDAY, JANUARY 8, 1998

     NEW YORK - AT&T  announced  today  that it has signed a  definitive  merger
agreement with Teleport  Communications Group (TCG) for an all-stock transaction
valued at approximately $11.3 billion. Under the agreement, each TCG share would
be exchanged for 0.943 of an AT&T share.

     AT&T said the  merger  will  accelerate  its  efforts  to bring  end-to-end
communications services to American businesses.

     The boards of AT&T and TCG approved the  transaction  today.  The companies
expect the  merger to be tax free to TCG  shareowners  and close in  mid-to-late
1998.

     "This is a great match with powerful financial and strategic  synergies for
both  companies,"  said AT&T  Chairman  and CEO C. Michael  Armstrong.  "Joining
forces with TCG will speed AT&T's entry into the local business  market,  reduce
our costs and enable us to provide  businesses  the  any-distance  services they
want.

     "TCG has more fiber route miles and serves more  businesses  in more cities
than any other competitive local services  company," said Armstrong.  "Together,
we will be able to bring AT&T Digital Link  Service to thousands  more  American
businesses."

                                    - more -
<PAGE>
                                      - 2 -

     AT&T said that it expects  the  merger to begin  contributing  to  positive
earnings in the first full year after it closes,  based on projected  savings in
access payments beyond those in AT&T's current business plan; the elimination of
duplicate  sales  and  administrative  expenses;  a  reduction  in the  combined
companies' capital and network operating  expenses,  and higher revenues through
faster   implementation  of  AT&T's   initiatives  to  bring  local  service  to
businesses. In 1998, the merger is expected to be slightly dilutive.

     TCG will  become  the  foundation  on which AT&T will build a new unit with
accountability  for the  company's  local  services.  TCG also will  continue to
provide wholesale services.

     Robert  Annunziata,  chairman and CEO of TCG, will become an executive vice
president  of AT&T and lead a new local  services  unit  that  will  incorporate
AT&T's  current  local  service and access  management  operations.  Like all of
AT&T's most senior  officers,  Annunziata,  49, will jointly report to Armstrong
and to  President  John  Zeglis.  Annunziata  will  also  become a member of the
company's  Operations  Group. He will maintain offices at the company's  Basking
Ridge, N.J., operational headquarters and at TCG's offices in Dayton, N. J.

     "Competitive   providers   have   an   insignificant   percentage   of  the
multi-billion  dollar business local services  market," said  Annunziata.  "With
AT&T and our own  experienced  team, TCG will be able to step up our decade-long
efforts to bring superior services to more customers in more markets nationwide.

     "I see nothing but strong growth and opportunities ahead," he said.

     AT&T and TCG have long had significant  commercial  relationships  and they
intend to continue and expand them in the period prior to the merger's closing.

     To ensure that AT&T will benefit from the experience and expertise of TCG's
proven  management team,  Annunziata and his top managers have signed employment
agreements with AT&T that extend into the next century.

     The  companies  do not believe  that a  significant  number of jobs will be
eliminated due to the merger because of the huge growth opportunity in the local
business services market.

     "Bob  Annunziata is an  outstanding  addition to AT&T's  senior  management
team," said Armstrong.  "His  impressive  track record and more than a decade of
experience in the competitive  local exchange  carrier business make him ideally
suited to head up our new combined local services unit." - more - - 3 -

     Cox Communications,  Comcast Corporation,  and  Tele-Communications,  Inc.,
which together hold  approximately 95 percent of the voting power and 66 percent
of the equity ownership of TCG, have approved the merger by written consent.  In
addition,  they have signed long-term  agreements under which they will continue
providing certain construction and maintenance services to TCG after the merger.

     TCG, which has more than 3,000 employees,  is the nation's premier provider
of  competitive  local   communications   services.   Its  fiber  optic  network
encompasses more than 250 communities  from coast to coast,  including 66 of the
nation's  major  markets.  Its  customers  include some of the nation's  leading
banks,  brokerage  firms,  media  companies,   government  offices,   hospitals,
educational  institutions,  and a wide range of other  industries and businesses
that depend on accurate and reliable  communications.  TCG is a leading Internet
services  provider and when its pending  acquisition of ACC Corp. is closed,  it
will  be  a  major   supplier   of   competitive   telecommunications   services
internationally.

     AT&T Corp. is the world's premier  communications and information  services
company, serving more than 90 million customers, including consumers, businesses
and  government.  The company  has annual  revenues of more than $52 billion and
130,000   employees.   It  runs  the   world's   largest,   most   sophisticated
communications network and is the leading provider of long-distance and wireless
services.  AT&T operates in more than 200 countries and  territories  around the
world.

     The company also offers  on-line  services  and has begun to deliver  local
telephone  service.  In addition,  AT&T  provides  outsourcing,  consulting  and
systems-integration services to large businesses.

     AT&T was  advised on the  transaction  by Credit  Suisse  First  Boston and
Goldman,  Sachs & Co. TCG was advised by Merrill Lynch & Co. The companies  said
the merger is subject to regulatory approval and certain other conditions.



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