Acme Packet Enables Secure, Premium Quality Interactive Communication and Video Services for Mobile Broadband

Acme Packet® (NASDAQ: APKT), the leader in session border control solutions, today announced that it is enabling new interactive communication and entertainment services for mobile broadband networks with the launch of a new product capability and joining an industry initiative. Acme Packet has introduced streaming video control with a new Real Time Streaming Protocol (RTSP) proxy capability. Additionally, Acme Packet has joined the GSM Association (GSMA) Rich Communications Suite (RCS) initiative to help define and promote IMS-based interactive communication services over 3G radio access networks (RANs) and has successfully participated in a RCS Release 1 trial. The video control capability and RCS initiative can each enable new revenue possibilities for service providers including IPTV and SIP-based interactive communications for mobile devices and laptops connected to 3G, LTE and fixed and mobile WiMAX.

“The speed and connectivity of 3G and 4G promises a new world of communication and entertainment services for subscribers and tantalizing revenue opportunities for operators,” commented Seamus Hourihan, vice president of marketing and product management with Acme Packet. “With the addition of our new video control capability and involvement in the RCS industry initiative, Acme Packet’s focus on security, seamless interoperability and quality of experience is extended to video services and new interactive communications for mobile broadband networks.”

Session Border Controllers for streaming video control

Acme Packet advanced the functionality of its market leading Net-Net® session border controllers (SBCs) by adding a RTSP proxy for the control of streaming video, video-on-demand and IPTV. This control leverages the position of SBCs at the access border of the services and application network. The Net-Net SBCs proxy all RTSP commands, such as play, pause, stop and rewind, between video clients and servers. The same security, SLA assurance and network availability benefits provided by the Net-Net SBCs are now extended to streaming video and IPTV services.

Acme Packet’s field-proven Net-SAFE® (Session Aware Filtering and Enforcement) capabilities protect video services as well as interactive communications. Net-SAFE provides comprehensive security functions including SBC DoS/DDoS protection, DoS/DDoS attack and overload prevention, dynamic access control and topology hiding for the video server network. The Net-Net SBCs IMS DIAMETER Rx interface works with external PCRF (Policy Charging Rules Function) elements to provide resource reservation and admission control for video services. The interface to external policy servers complements the Net-Net SBC’s local policies, which track other element and network resource constraints, such as global bandwidth limitations per network or subscriber and signaling loads on SIP servers.

Acme Packet will demonstrate its streaming video control during GSMA Mobile World Congress at Fira de Barcelona February 16 – 19, 2009 in hospitality suite Z3.12. To schedule a meeting with Acme Packet or view the demonstration at Mobile World Congress complete the meeting request form on the Acme Packet website.

Acme Packet and GSMA RCS

The Rich Communication Suite initiative is a GSMA-led program advocating the rapid adoption of mobile applications and services. The program, driven by service providers and equipment and device vendors, is defining the basis for an interoperable, convergent, rich communication experience. Acme Packet is an Associate member of the GSMA and joined this initiative in December 2008. RCS Release 1 features are IMS-based interactive communication services over 3G IP radio access networks that enhance today’s circuit-switched voice services. These services include instant messaging, presence information, video sharing and file transfer. RCS and other SIP-based interactive communications can help accelerate the return on IMS investments for today’s 3G networks and prepare mobile operators for the transition to all IP 4G RANs. Additional RCS services will be defined throughout 2009.

Acme Packet’s Net-Net SBCs were used in a RCS Release 1 trial completed in January 2009 by a leading mobile operator in France. In this test, the session border controllers provided SIP session and media control for the RCS services at the access border between the IMS services network and the 3G packet RAN, as well as the interconnect border with another mobile operator.

Acme Packet’s Net-Net SBCs provide critical security and control functions for SIP-based interactive communication and RCS services. At the access border between the 3G RAN and IMS/RCS applications, the Net-Net SBC protects the IMS service infrastructure, provides seamless interoperability between endpoint devices and service infrastructure and assures SLAs. Net-Net SBCs deployed at interconnect border between mobile operators provide the SIP security and session control functions required to enable RCS services to work end-to-end across multiple operators. GSMA IPX carriers providing interconnect and transit services for service providers can use the Net-Net SBC as a proxy in the IPX to make RCS services interoperable across multiple mobile operators while meeting criteria for security, quality and billing.

For more information on the GSMA and its projects, visit www.gsmworld.com.

About Acme Packet

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—and data services across IP network borders. Our Net-Net family of session border controllers, multiservice security gateways and session routing proxies 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 more than 635 customers in 92 countries, including 29 of the top 30, and 89 of the top 100 service providers in the world. For more information, contact us at +1 781.328.4400, or visit www.acmepacket.com.

Acme Packet Safe Harbor Statement

Statements contained herein that are not historical fact may be forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements may relate, among other things, to our position in the session border control market, our expected financial and operating results, our ability to build and grow Acme Packet, the benefits and expected deployments of our products or services, and our ability to achieve our goals, plans and objectives. Such forward-looking statements do not constitute guarantees of future performance and are subject to a variety of risks and uncertainties that could cause our actual results to differ materially from those anticipated. These include, but are not limited to: difficulties in growing our customer base, difficulties leveraging market opportunities, difficulties providing solutions that meet the needs of customers, poor product sales, long sales cycles, difficulty developing new products, difficulty in relationships with vendors and partners, higher risk in international operations, difficulty managing rapid growth, and increased competition. Additional factors that could cause actual results to differ materially form those projected or suggested in any forward-looking statements are contained in our recent filings with the Securities and Exchange Commission, including those factors discussed under the caption “Risk Factors” in such filings.