Acme Packet to Release Second Quarter Financial Results on August 1, 2007

Business Wire, July 9, 2007

BURLINGTON, Mass. -- Acme Packet, Inc. (NASDAQ: APKT), the leader in session border control solutions, today announced that it will release financial results for the second quarter ended June 30, 2007 on Wednesday, August 1, 2007 after the market closes. The Company's management team plans to host a live conference call and webcast at 5:00 p.m. eastern time on that day to discuss the financial results as well as management's outlook for the business. The conference call may be accessed in the United States by dialing (877) 777-1973 and using access code "APKT". The conference call may be accessed outside of the United States by dialing (612) 332-1025 and using access code "APKT". The conference call will be simultaneously webcast on the Company's investor relations website, which can be accessed at www.ir.acmepacket.com. A replay of the conference call will be available approximately two hours after the call by dialing (800) 475-6701 and using access code 879939 or by accessing the webcast replay on the Company's investor relations website.

About Acme Packet, Inc.

Acme Packet, Inc. (NASDAQ: APKT), the leader in session border control solutions, enables the delivery of trusted, first class interactive communications - voice, video and multimedia sessions - across IP network borders. Our Net-Net family of session border controllers supports multiple applications in service provider, large enterprise and contact center networks - from VoIP trunking to hosted enterprise and residential services to fixed-mobile convergence. They satisfy critical security, service assurance and regulatory requirements in wireline, cable and wireless networks; and support multiple protocols - SIP, H.323, MGCP/NCS and H.248 - and multiple border points - interconnect, access and data center. Our products have been selected by over 390 service providers in 77 countries, including 23 of the top 25, and 75 of the top 100 service providers in the world. For more information, contact us at 1 781.328.4400, or visit www.acmepacket.com.