ADP Revs Up Managed VoIP Services with Acme Packet.

Acme Packet Net-Net Session Border Controllers Secure VoIP Services for ADP's Auto and Truck Dealerships Nationwide

CHICAGO -- Acme Packet[R] (NASDAQ: APKT), the leader in session border control solutions, today announced that Automatic Data Processing, Inc. (NYSE: ADP), through its wholly-owned subsidiary IP Networked Services, is leveraging Acme Packet's Net-Net[R] session border controllers (SBCs) to offer a hosted PBX service, ADP Network Phone ASP, to the automotive and truck vertical markets.

With Acme Packet's SBCs, ADP is delivering an advanced suite of VoIP services to their customers. The SBCs provide critical features in a multiservice architecture, at both the access and interconnect borders, to satisfy ADP's security, service reach and SLA assurance requirements. To address the FCC mandate for VoIP lawful intercept, ADP uses Acme Packet's SBCs, in conjunction with other elements, to comply with CALEA. The SBCs are deployed in ADP's data center in a high-availability configuration to help assure maximum service availability.

"With Acme Packet's SBCs in our network, we now have the security, scalability and service assurance capabilities that are required for us to deliver a trusted managed VoIP service," said Martin Sorensen, manager, network engineering, at ADP. "Acme Packet's intelligent denial of service attack prevention features and high availability configurations fulfilled critical requirements for our service offering."

"ADP is offering a comprehensive hosted VoIP solution for auto and truck dealerships, expanding its solutions offerings to its existing customer base," explained Seamus Hourihan, vice president of marketing and product management at Acme Packet. "With our SBCs, ADP can deliver VoIP services securely and reliably, positioning ADP Network Phone ASP as an attractive offering for auto dealerships looking to outsource phone system management and completely avoid costly upgrades to their older phone systems."

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 ADP

Automatic Data Processing, Inc. (NYSE: ADP), with over $7 billion in revenues and more than 570,000 clients, is one of the world's largest providers of business outsourcing solutions. ADP is a leading provider of integrated computing solutions to auto, truck, motorcycle, marine and recreational vehicle dealers throughout the world. Additionally, leveraging more than 55 years of experience, ADP offers the widest range of HR, payroll, tax and benefits administration solutions from a single source. ADP's cost-effective, easy-to-use solutions provide superior value to organizations of all types and sizes. For more information about ADP or to contact a local ADP sales office, visit the company's Web site at www.ADP.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 establish and maintain intellectual property rights, our ability to build and grow Acme Packet, the benefits and advantages of our products, including any enhancements or new features, services and programs 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.