October 30, 1997




Mr. Frank Ianna
425 Devonshire Drive
Franklin Lakes, NJ  07417

Dear Frank:

         The purpose of this letter  agreement  (hereinafter  "Agreement") is to
detail and document a special individual  non-qualified  supplemental retirement
arrangement we have developed for you. Under this Agreement,  a deferred account
(hereinafter   "Deferred  Account")  will  be  established  in  your  name.  The
maintenance,  vesting, forfeiture and distribution of the Deferred Account shall
be in accordance with the following terms and conditions.

         On November 1, 1997  (hereinafter  the  "Effective  Date"),  AT&T Corp.
(hereafter  "the  Company")  shall credit the  Deferred  Account with an initial
balance of Eight  Hundred and Twenty  Eight  Thousand  Dollars  ($828,000).  The
Company  shall  credit  interest to the  Deferred  Account as of the end of each
calendar  quarter at a rate equal to one-quarter of the average 30 Year Treasury
Bond Rate in effect for the last previous quarter.

         The Deferred Account will be maintained as a bookkeeping account on the
records of the Company and you will have no present  ownership right or interest
in the Deferred Account,  nor in any assets of the Company with respect thereto.
The Deferred Account may not be assigned,  pledged or otherwise alienated by you
and any attempt to do so, or any garnishment, execution or levy of any kind with
respect to the Deferred Account, will not be recognized.  You shall not have any
right to receive any payment  with respect to the  Deferred  Account,  except as
expressly provided below.

         In the  event you  cease to be a  Company  employee  prior to the sixth
anniversary of the Effective Date:

                    (a)    by  reason  of  death  or  Long-Term  Disability  (as
                           defined below),  all amounts credited to the Deferred
                           Account through the  date of such  termination, shall
                           be   paid   to   you    [or,  upon   your   death  to
                           your  beneficiary,  as  designated  on a  form  filed
                           with  Executive  Human  Resources,  or to your estate
                           if no beneficiary  has  been designated, (hereinafter
                           your   Survivors)]  within   the   calendar   quarter
                           immediately  following the quarter which includes the
                           date of your  termination  of Company employment;

                    (b)    by reason of Company-initiated  termination for other
                           than Cause (as defined below),  all amounts  credited
                           to the Deferred Account through the sixth anniversary



                           of the  Effective  Date  shall  be paid to you (or to
                           your   Survivors)   within   the   calendar   quarter
                           immediately following the quarter which includes such
                           sixth anniversary;

                    (c)    by reason of your election  to terminate your Company
                           employment  for Good Reason (as defined  below),  all
                           amounts  credited to the Deferred Account through the
                           sixth anniversary of the Effective Date shall be paid
                           to you (or to your  Survivors)  within  the  calendar
                           quarter  immediately   following  the  quarter  which
                           includes such sixth anniversary; and

                    (d)    for   any   reason  other   than   death, "Long  Term
                           Disability," Company-initiated  termination for other
                           than "Cause,"  or  your  election  to terminate  your
                           employment for "Good Reason," then all amounts in the
                           Deferred  Account shall be canceled and you shall not
                           receive any distribution with respect to the Deferred
                           Account or  have any further interest in the Deferred
                           Account.

         In the event you cease to be a Company  employee  on or after the sixth
anniversary  of the  Effective  Date for any reason  other than your death,  all
amounts  credited to the Deferred  Account will be paid to you in ____ (1 to 10)
_____ (initials)  approximately equal annual installments  commencing within the
first  calendar  quarter of the calendar  year  following the year in which your
termination  of  employment  occurs.  Unpaid  Deferred  Account  balances  after
termination  continue to be credited with  interest.  In the event of your death
prior to either  commencement  or completion of Deferred  Account  payment(s) to
you, the unpaid  balance of the Deferred  Account as of your death shall be paid
to  your  Survivors  in a lump  sum  within  the  calendar  quarter  immediately
following the quarter which includes the date of your death.

         For purposes of this Agreement:

    (a)  "Long Term Disability" shall mean  termination of  your employment with
         the   Company  with  eligibility  to  receive  a  disability  allowance
         under     the   AT&T   Senior  Management  Long  Term  Disability   and
         Survivor  Protection Plan or a replacement plan;

    (b) "Cause" shall mean:

         (i)      your breach of any of the terms of this Agreement;

         (ii)     your   conviction   (including   a  plea  of  guilty  or  nolo
                  contendere) of a crime involving theft,  fraud,  dishonesty or
                  moral turpitude;

         (iii)    gross omission or gross  dereliction of any statutory,  common
                  law or other  duty of  loyalty  to the  Company  or any of its
                  affiliates;

         (iv)     violation by you of the Company's Code of Conduct or
                  Non-Competition Guideline; or

         (v)      repeated  failure  to carry out the  duties  of your  position
                  despite specific instruction to do so.


    (c)  "Good Reason" shall mean the  occurrence  without your express  written
         consent of any of the following events:

         (i)      Your  demotion  to  a  position  which  is  not of  a rank and
                  responsibility  comparable  to members of  the current  Senior
                  Management Team or those  of  a  similar/replacing  governance
                  body;  provided,  however,  that the Company's decision not to
                  continue a Senior Management Team  shall not be  Good  Reason,
                  and   provided,  further,   that  (1)  changes  in   reporting
                  relationships shall not,  alone, constitute Good Reason and/or
                  (2) a reduction in your business unit's budget or a  reduction
                  in your business  unit's head  count,  by  themselves,  do not
                  constitute  Good Reason; or

         (ii)     a  reduction in  your "Total Annual Compensation" (defined  as
                  the  sum  of  your  Annual  Base Salary  Rate,  Target  Annual
                  Incentive and "Target Annual Long Term Incentive  Grants") for
                  any calendar or fiscal year, as applicable,  to an amount that
                  is less than the Total Annual Compensation that existed in the
                  prior  calendar  or fiscal year, as  applicable.  For purposes
                  of  this  paragraph (c)(ii) the  dollar  value of  the "Target
                  Annual Long Term Incentive  Grants" shall exclude the value of
                  any special  one-time or periodic long-term  incentive grants,
                  and  shall be determined by  valuing Performance Shares, Stock
                  Units, Restricted Stock,  Restricted Stock Units, etc., at the
                  market  share  price  utilized  in  valuing  the annual Senior
                  Management compensation structures in the materials  presented
                  to  the Compensation and  Employee  Benefits  Committee of the
                  Company's Board of Directors when  authorizing   such  grants,
                  and   assuming  100% performance  achievement if  such  grants
                  include  performance  criteria.    Stock  Options  and   Stock
                  Appreciation  Rights  will  be  valued  by  the Black  Scholes
                  methodology (and  related share  price)  as  utilized  in  the
                  materials presented to such Compensation and Employee Benefits
                  Committee  when authorizing such grants.

          It is understood and agreed that you will not talk about,  write about
or otherwise  publicize  the terms or  existence  of this  Agreement or any fact
concerning  its  execution  or  implementation.  You may,  however,  discuss its
contents  with your  spouse,  legal  and/or  financial  counselor.  IN ADDITION,
DEFERRED ACCOUNT AMOUNTS PROVIDED UNDER THIS AGREEMENT ARE SUBJECT TO FORFEITURE
(OR  REPAYMENT IF SUCH  AMOUNTS  ALREADY HAVE BEEN PAID) IF YOU VIOLATE THE AT&T
NON-COMPETITION  GUIDELINE IN EFFECT AT THE TIME OF THE VIOLATION  ANYTIME PRIOR
TO THE THIRD ANNIVERSARY OF YOUR TERMINATION OF COMPANY EMPLOYMENT. (THE CURRENT
GUIDELINE SUMMARY IS ATTACHED.)

         THIS  AGREEMENT  IS  NOT  AN  EMPLOYMENT  CONTRACT  AND  SHOULD  NOT BE
CONSTRUED OR INTERPRETED  AS CONTAINING  ANY GUARANTEE OF CONTINUED  EMPLOYMENT.
THE   EMPLOYMENT   RELATIONSHIP   WITH  THE   COMPANY   IS  BY  MUTUAL   CONSENT
("EMPLOYMENT-AT-WILL").  THIS MEANS THAT  EMPLOYEES  HAVE THE RIGHT TO TERMINATE
THEIR EMPLOYMENT AT ANY TIME AND FOR ANY REASON.  LIKEWISE, THE COMPANY RESERVES
THE RIGHT TO DISCONTINUE  YOUR  EMPLOYMENT WITH OR WITHOUT CAUSE AT ANY TIME AND
FOR ANY REASON.

         Payments  from the Deferred  Account are in addition to and not in lieu
of any qualified or non-qualified  pension,  savings,  or other retirement plan,
program  or  arrangement  covering  you,  nor are such  payments  in lieu of any
payments  or other  benefits  which may be provided to you under the AT&T Senior



Officer  Severance  Plan.  The Deferred  Account  payments  provided  under this
Agreement  are subject to payroll tax  withholding  and  reporting,  and amounts
credited to the Deferred  Account are not  included in the base for  calculating
benefits  under any  employee  or Senior  Management  benefit  plan,  program or
practice.

         Any  dispute,  controversy,  or  question  arising  under,  out of,  or
relating  to this  Agreement  or the  breach  thereof,  shall  be  referred  for
arbitration in the State of New Jersey to a neutral  arbitrator  selected by you
and the Company. The proceeding shall be governed by the Commercial Rules of the
American Arbitration Association then in effect or such rules last in effect (in
the event such  Association  is no longer in existence)  and the decision of the
arbitrator  shall be  governed  by the rule of law. If the parties are unable to
agree upon a neutral  arbitrator  within  thirty  (30) days after each party has
given the other written notice of the desire to submit the dispute,  controversy
or question  for  decision  as  aforesaid,  then  either  party may apply to the
American  Arbitration  Association for the appointment of a neutral  arbitrator,
or, if such  Association  is not then in  existence or does not desire to act in
the matter,  either party may apply to the Presiding Judge of the Superior Court
of any county in New Jersey for the appointment of a neutral  arbitrator to hear
the parties and settle the dispute,  controversy or question,  and such right to
submit a dispute  arising  hereunder  to  arbitration  and the  decision  of the
neutral  arbitrator  shall be final,  conclusive  and binding on all  interested
persons  and  no  action  at  law or in  equity  shall  be  instituted,  or,  if
instituted,  further  prosecuted by either party other than to enforce the award
of the neutral arbitrator.  You and the Company shall each bear all your and its
own costs and attorney fees,  except that the Company shall pay the costs of any
arbitrator appointed hereunder as well as the copy of any official transcript of
the proceeding.

         The  construction,  interpretation  and  performance  of this Agreement
shall be governed by the laws of the State of New Jersey,  without regard to its
conflict of laws rule.

         Frank,  I am happy to  present  this  special  arrangement  to you.  It
recognizes the extraordinary  contribution you have made to our business. If you
agree with the terms and  conditions  detailed  above,  please enter your payout
election  and  initial  in the  spaces  provided  on page 2,  sign and date this
Agreement in the spaces  provided below and, prior to November 14, 1997,  return
the original executed copy to me.

                                       Sincerely,





Attachment




______________________________         ___________________________________
Acknowledged and Agreed to             Date
Frank Ianna