On November 6, 2008, Acme Packet, Inc. issued a press release to announce its financial results for the third quarter ended September 30, 2008. The press release is furnished herewith as Exhibit 99.1 and incorporated by reference herein.

The information in this report (including Exhibit 99.1) is being "furnished" and shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended (the "Securities Act"), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

(d) Exhibits

Exhibit                                 Description

99.1       Press Release dated November 6, 2008 entitled "Acme Packet Reports
           Results for Third Quarter of Fiscal Year 2008"