EX-99.1 2 ex1to13d.txt JOINT FILING AGREEMENT EXHIBIT 1 JOINT FILING AGREEMENT The undersigned hereby agree that the amendment to the statement on Schedule 13D with respect to the Common Stock of Avaya Inc. is, and any further amendment thereto signed by each of the undersigned shall be, filed on behalf of each undersigned pursuant to and in accordance with the provisions of 13d-1(k) under the Securities Exchange Act of 1934, as amended. WARBURG, PINCUS EQUITY PARTNERS, L.P. By: Warburg Pincus Partners, LLC its General Manager By: Warburg Pincus & Co., its Managing Member By: /s/ Scott A. Arenare ----------------------------------- Name: Scott A. Arenare Title: Partner Dated: August 3, 2005 WARBURG PINCUS PARTNERS, LLC By: Warburg Pincus & Co., its Managing Member By: /s/ Scott A. Arenare ----------------------------------- Name: Scott A. Arenare Title: Partner Dated: August 3, 2005 WARBURG PINCUS & Co. By: /s/ Scott A. Arenare ----------------------------------- Name: Scott A. Arenare Title: Partner Dated: August 3, 2005 WARBURG PINCUS LLC By: /s/ Scott A. Arenare ----------------------------------- Name: Scott A. Arenare Title: Member Dated: August 3, 2005 WARBURG, PINCUS NETHERLANDS EQUITY PARTNERS I, C.V. By: Warburg Pincus Partners, LLC its General Partner By: Warburg Pincus & Co., its Managing Member By: /s/ Scott A. Arenare ----------------------------------- Name: Scott A. Arenare Title: Partner Dated: August 3, 2005 WARBURG, PINCUS NETHERLANDS EQUITY PARTNERS III, C.V. By: Warburg Pincus Partners, LLC its General Partner By: Warburg Pincus & Co., its Managing Member By: /s/ Scott A. Arenare ----------------------------------- Name: Scott A. Arenare Title: Partner Dated: August 3, 2005