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): APRIL 15, 1999 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 5. OTHER EVENTS. On April 15, 1999, the Company issued a press release, a copy of which is attached as Exhibit 99.1 to this Current Report on Form 8-K. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (a) Not Applicable (b) Not Applicable (c) Exhibits 99.1 Press Release of the Company dated April 15, 1999 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/ Christopher Stavros ---------------------------------- Christopher Stavros Vice President and General Counsel Dated: April 22, 1999 EXHIBIT INDEX EXHIBIT NO. DESCRIPTION - ----------- ----------- 99.1 Press Release of the Company dated April 15, 1999