Exhibit I
FILING AGREEMENT
Pursuant to Rule 13d-1(f) promulgated under the Securities Exchange Act
of 1934, the undersigned hereby agree to the filing of this amendment to the
Statement on Schedule 13D on behalf of SBC Communications Inc., a Delaware
corporation and Southwestern Xxxx International Holdings (UK-1) Corporation, a
Delaware corporation.
This Agreement may be executed in any number of counterparts, each of
which shall be deemed an original, but all of which shall constitute one and the
same instrument.
Dated: September 14, 1998
SBC COMMUNICATIONS INC.
By: /s/ Xxxxxx X. Xxxxxxx
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Name: Xxxxxx X. Xxxxxxx
Title: Senior Vice President,
Treasurer and Chief
Financial Officer
SOUTHWESTERN XXXX INTERNATIONAL
HOLDINGS (UK-1) CORPORATION
By: /s/ Xxxxx X. Xxxxxxx
-----------------------------------
Name: Xxxxx X. Xxxxxxx
Title: Treasurer
