EXHIBIT 4-e

                              GUARANTEE UNDERTAKING
                                       OF
                             THE ASSISTANT TREASURER
                                       OF
                            SBC COMMUNICATIONS, INC.


     I, the Assistant Treasurer of SBC Communications Inc. (the "Corporation"),
pursuant to the authority granted to me in the Schedule of Authorizations of the
Corporation, dated as of November 19, 1999, hereby undertake on behalf of the
Corporation for the benefit of the respective holders of the Subject Debt
Securities (as defined below), as follows:

     (1) The Corporation hereby unconditionally and irrevocably guarantees, as
long as all of the outstanding shares of stock of a Subsidiary, as defined
below, are owned, directly or indirectly, by the Corporation the punctual and
full payment of all amounts payable by such Subsidiary Southwestern Bell
Telephone Company, Pacific Bell Telephone Company, The Southern New England
Telephone Company, Southern New England Telecommunications Corporation,
Ameritech Capital Funding Corporation, The Ohio Bell Telephone Company,
Wisconsin Bell, Inc., Michigan Bell Telephone Company, Indiana Bell Telephone
Company Inc., and Illinois Bell Telephone Company (each, a "Subsidiary"), under
each of the outstanding Debt Securities as and when the same shall become due
and payable (whether at stated maturity, by declaration of acceleration, call
for redemption, repayment at the option of the holder or otherwise, in
accordance with the terms of each Debt Security and of each indenture under
which such security was issued) (the "Guarantee"). In the event the Corporation
sells, transfers or otherwise disposes of any percentage of its stock ownership
of a Subsidiary, and, as a result of such sale, transfer or other disposition,
such Subsidiary is no longer a wholly-owned subsidiary of the Corporation, then
this Guarantee shall expire immediately and the Corporation shall be released
immediately from any and all of its obligations hereunder.

     (2) Subject to the provision of Section (1) hereof, the Guarantee with
respect to each outstanding Debt Security will continuously remain in effect
until the entire principal of (and premium, if any) and interest, if any, on
such Debt Security shall have been paid in full.

     (3) The Guarantee will constitute the direct, absolute and unconditional,
unsubordinated and unsecured obligation of the Corporation ranking pari passu
with all of its unsecured and unsubordinated obligations.






     (4) The holders of each Debt Security are entitled to enforce their rights
under the indenture relating to such security directly against the Corporation,
without first instituting a proceeding against the issuer of such security or
any other person or entity, upon any event of default in payment of principal,
or premium, if any, or interest, if any, on such security (whether at stated
maturity, by declaration of acceleration, call for redemption, repayment at the
option of the holder or otherwise).

     (5) This Guarantee undertaking is enforceable to the fullest extent
permitted by law.

     (6) For the purposes of this Guarantee undertaking, the term "Debt
Securities" shall mean the following:



                             See enclosed Exhibit A



     (7) The Guarantee is effective on the date hereof.



            IN WITNESS WHEREOF, I have executed this Guarantee undertaking.


Dated: January 5, 2000




                                /s/ Roger Wohlert
                              ------------------------------

                              Name:  Roger Wohlert
                              Title: Assistant Treasurer