Acme Packet Connected Universe Expands as Market for VoIP Interconnect and Peering Grows.

Belgacom ICS, Momentum Telecom, PAETEC and Telcordia Join Acme Packet's Interconnect Program

CHICAGO -- Acme Packet[R] (NASDAQ: APKT), the leader in session border control solutions, today announced the expansion of its Acme Packet Connected Universe[TM] program with the addition of four new Constellation members. Acme Packet Connected Universe, launched in November 2006, is a program designed to facilitate business relationships among Acme Packet-enabled service providers that extend service reach, drive down costs, improve service quality and ultimately leverage new IP interactive communication service opportunities beyond voice. Leading U.S. and European service provider customers and partners of Acme Packet -- Belgacom International Carrier Services (ICS), Momentum Telecom, PAETEC and Telcordia -- have joined the program, which now totals nearly 20 members.

"By becoming a member of the Acme Packet Connected Universe, we are able to market our wholesale services to a community of other Acme Packet-enabled networks and acquire new leads," explained Patrick Tata, vice president/general manager from PAETEC Wholesale Markets. "We anticipate the referrals through this program will be instrumental in developing future business opportunities."

Four Acme Packet-enabled service providers have recently joined Acme Packet Connected Universe as Constellation members, joining a community of industry leaders in VoIP such as Global Crossing, NeuStar, VeriSign and Stealth Communications. The new Constellation members offer various wholesale services, connecting to their service provider customers using direct IP interconnects. The new members include:

Belgacom International Carrier Services is a leading supplier of voice, data and value-added services to over 400 wireless, wireline and service providers through sales offices in Brussels, Bern, Dubai, Singapore and NY. Belgacom ICS aims to enable global interworking across all networks, technologies and services. As a result of this approach and the joint venture with Swisscom, Belgacom ICS is now the eighth largest wholesale-voice-service provider and world leader in data transit services.

Momentum Telecom Wholesale is a residential and business digital phone service provider based in Birmingham, Alabama. The wholesale division of Momentum Telecom offers private label solutions for independent cable operators and municipalities to provide the highest quality digital telephone service to their customers.

PAETEC is a facilities-based provider of voice and data network services to carrier and enterprise customers in 52 of the top 100 Metropolitan Service areas in the United States. PAETEC's comprehensive communications portfolio accommodates the needs of wholesale service providers, agents, resellers and enterprise customers.

Telcordia Technologies, Inc. is the leading global provider of telecommunications network software and services for IP, wireline, wireless, and cable. The Telcordia[R] Service Interconnection Registry is a secure, centrally-managed, carrier-grade registry that enables inter-carrier routing and rating for both TDM- and IP-enabled services. IP Service Interconnection allows carriers to interconnect via IP to deliver VoIP, IMS and other converged services, while enabling carriers to migrate seamlessly from PSTN to IP.

"As a CLEC joining Acme Packet Connected Universe, we can look forward to forming peering relationships with other service providers to provide even more value and services to our customers," said Rick Giardin, VP, engineering from DSCI, an existing Star member of Acme Packet Connected Universe. "The program helps us to expand our network reach and realize new opportunities while taking full advantage of the security and control capabilities of Acme Packet's Net-Net session border controllers."

"For VoIP interconnection to move beyond simple, opportunistic arrangements into the mainstream, several fundamental issues must be addressed," explained Seamus Hourihan, vice president of marketing and product management at Acme Packet. "These issues include the different protocols used, network security and call quality, as well as how carriers actually establish business relationships and economic models that drive revenue and lower cost. Acme Packet's SBCs are helping service providers address the technical issues and our Acme Packet Connected Universe helps alleviate the business challenges as our customers look to implement and grow VoIP peering and interconnect relationships."

Visit Acme Packet at NXTcomm in Chicago, IL, June 19th to the 21st, in booth 6051.

About Acme Packet

Acme Packet, 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.

About Acme Packet Connected Universe

Acme Packet Connected Universe leverages Acme Packet's growing global community service provider customers to promote trusted, first class IP interconnects and introduce interconnect partners. Program participants use Acme Packet Net-Net session border controllers to connect to one another directly, via neutral exchanges, or as part of private federations. The program helps service providers quickly find potential IP interconnect and peering arrangements and build business relationships with Acme Packet experienced service providers. With Acme Packet SBCs at each interconnect border, participating companies can accelerate time-to-market as the Net-Net SBCs easily interoperate with each other and help ensure signaling compatibility between networks. For more information on the program, visit www.acmepacket.com/connecteduniverse.

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 of our product, 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.