<Page> SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D. C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 3, 2002 AVAYA INC. (Exact name of registrant as specified in its charter) Delaware 1-15951 22-3713430 (State or other jurisdiction (Commission (IRS Employer of incorporation) File Number) Identification No.) 211 Mount Airy Road Basking Ridge, NJ 07920 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (908) 953-6000 <Page> ITEM 5. OTHER EVENTS On September 3, 2002, Avaya Inc., a Delaware corporation ("Avaya"), entered into an Amended and Restated Five Year Competitive Advance and Revolving Credit Facility Agreement (the "Amended Credit Agreement"), dated as of September 3, 2002, with Citibank, N.A., as Agent and the other Lenders party thereto. The Amended Credit Agreement provides for the amendment of Avaya's existing $561 million five year credit facility substantially on the terms announced by Avaya on August 15, 2002. The Amended Credit Facility is attached hereto as Exhibit 10.1. ITEM 7(c). EXHIBITS 10.1 Amended and Restated Five-Year Competitive Advance and Revolving Credit Agreement, dated as of September 3, 2002 among the Company, the lenders party to the Credit Agreement and Citibank, N.A., as Agent for such lenders. <Page> SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. AVAYA INC. Date: September 4, 2002 By: /s/ Garry K. McGuire ------------------------------------ Name: Garry K. McGuire Title: Chief Financial Officer and Senior Vice President, Operations <Page> EXHIBIT INDEX <Table> <Caption> EXHIBIT NUMBER DESCRIPTION - -------------- ----------- 10.1 Amended and Restated Five-Year Competitive Advance and Revolving Credit Agreement, dated as of September 3, 2002 among the Company, the lenders party to the Credit Agreement and Citibank, N.A., as Agent for such lenders. </Table>