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): December 7, 1998 ---------------- EXCEL SWITCHING CORPORATION --------------------------- (Exact name of Registrant as specified in its charter) MASSACHUSETTS 0-23263 04-2992806 - ------------------------------- ------- ---------- (State or other jurisdiction of (Commission file number) (I.R.S. Employer incorporation or organization) Identification No.) 255 Independence Drive, Hyannis, MA 02601 - ---------------------------------------- ----- (Address of principal executive offices) (Zip Code) Registrant's telephone number including area code: (508) 862-3000 -------------- No change since last report --------------------------- (Former name or address, if changed since last report) Item 8. Change in Fiscal Year. - ------------------------------ On December 7, 1998, the Board of Directors of the Registrant approved a change in the Registrant's fiscal year from the last Saturday in December to December 31 of each year. The change was made to better synchronize the Registrant's fiscal periods with the majority of its customers and suppliers. The Registrant intends to file an annual report on Form 10-K for the year-end ended December 31, 1998 covering the transition period as well as the fiscal year. 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 thereunto duly authorized. EXCEL SWITCHING CORPORATION By: /s/ Robert P. Madonna --------------------- Robert P. Madonna President and Chief Executive Officer Dated: December 14, 1998