JOINT FILING AGREEMENT
Page 22 of 23 Pages
EXHIBIT D
JOINT FILING AGREEMENT
The undersigned hereby agree that the statement on Schedule 13G with respect to
the Common Stock of Global TeleSystems Group, Inc. dated as of February 11, 1999
is, and any amendments thereto signed by each of the undersigned shall be, filed
on behalf of us pursuant to and in accordance with the provisions of Rule
13d-1(f) under the Securities Exchange Act of 1934.
Date: February 12, 0000 XXXXXX XXXXX
By: /S/ XXXXXXX X. XXXX
-----------------------------------
Xxxxxxx X. Xxxx
Attorney-in-Fact
Date: February 12, 1999 XXXXXXXX XXXXXXXXXX
By: /S/ XXXXX XXXXXXX
-----------------------------------
Xxxxx Xxxxxxx
Attorney-in-Fact
Date: February 12, 1999 CHATTERJEE ADVISORS LLC
By: /S/ XXXXX XXXXXXX
-----------------------------------
Xxxxx Xxxxxxx
Manager
Date: February 12, 1999 CHATTERJEE MANAGEMENT COMPANY
By: /S/ XXXXX XXXXXXX
-----------------------------------
Xxxxx Xxxxxxx
Vice-President
Page 23 of 23 Pages
Date: February 12, 1999 WINSTON PARTNERS II LLC
By: Chatterjee Advisors LLC,
its Manager
By: /S/ XXXXX XXXXXXX
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Xxxxx Xxxxxxx
Manager
Date: February 12, 1999 WINSTON PARTNERS II LDC
By: /S/ XXXXX XXXXXXX
-----------------------------------
Xxxxx Xxxxxxx
Attorney-in-Fact
Date: February 12, 1999 CHATTERJEE FUND MANAGEMENT, L.P.
By: Xxxxxxxx Xxxxxxxxxx,
its General Partner
By: /S/ XXXXX XXXXXXX
------------------------------
Xxxxx Xxxxxxx
Attorney-in-Fact
