My friends at Acme Packet scored another win with their Net-Net SBCs.

Internode Launches Second-Generation VoIP Service with Acme Packet
Acme Packet Net-Net session border controllers deliver
security, service reach and quality for NodePhone2

BURLINGTON, MA, APRIL 23, 2007— Acme Packet® (NASDAQ: APKT), the leader in session border control solutions, today announced that Australian broadband provider Internode has deployed Acme Packet’s Net-Net® session border controllers (SBCs) to support its recently launched NodePhone2 VoIP service. NodePhone2 is Internode’s second generation VoIP service for business and residential customers throughout Australia. Acme Packet’s SBCs are deployed along with BroadSoft BroadWorks®, a VoIP application software platform, as a BroadSoft Premier Access Solution that streamlined the planning and delivery process for Internode’s new service.

Internode’s NodePhone2 launch comes 18 months after the kick-off of its Public Switched Telephone Network (PSTN) outbound-only NodePhone1 service. With NodePhone2, subscribers can now both receive and make calls over the PSTN as well as over Internode’s IP network to other NodePhone2 subscribers. All NodePhone calls are transported on Internode’s fully redundant, private IP national network, which is used by more than 100,000 customers throughout Australia.

Internode's NodePhone2 VoIP solution leverages Acme Packet's SBCs to maximize its service reach, protect the NodePhone network against malicious attacks and assure high service quality. Acme Packet’s Net-SAFE® security features, including access control, topology hiding and DoS/DDoS protection, ensure that Internode’s private IP network is both secure and available to provide IP interactive communication services. Acme Packet’s QoS reporting features equip Internode to monitor the quality of every NodePhone call by reporting media statistics, including jitter, packet loss and latency for every call, allowing Internode to detect and isolate quality-impacting problems. Hosted NAT traversal allows subscribers located behind firewalls to be served by NodePhone2 without requiring any changes at the customer site.

“Acme Packet was the correct choice for our session border control needs due to its industry-leading feature set, carrier-class scale and performance as well as proven success as BroadSoft’s Premier Access Solution partner,” said Jim Kellett, NodePhone Product Manager from Internode. “A number of customers have come to Internode after experiencing low-quality VoIP services elsewhere. With Acme Packet’s SBCs, we can deliver NodePhone2 with guaranteed call quality to meet the needs of both business and residential customers.”

“People want more from a phone call than just a cheap price; they want high quality. Best effort is not enough, especially for businesses that rely on IP communications,” explained Seamus Hourihan, vice president of marketing and product management for Acme Packet. “Our SBCs are a key element in delivering a high-quality and trusted next generation offering to Internode’s business and residential customers.”

About Acme Packet
Acme Packet, the leader in session border control solutions, enables service providers to deliver trusted, first class interactive communications—voice, video and multimedia sessions—across IP network borders. Our Net-Net family has been selected by over 360 service providers in 75 countries to satisfy critical security, service assurance and regulatory requirements in wireline, cable and wireless networks. Our customers include 23 of the top 25, and 72 of the top 100 service providers in the world. These deployments support multiple applications—from VoIP trunking to hosted enterprise and residential services to fixed mobile convergence; multiple protocols—SIP, H.323, MGCP/NCS and H.248; and multiple border points—interconnect, access network and data center. For more information, contact us at +1 781.328.4400, or visit www.acmepacket.com.

About Internode
Internode is an Internet age carrier committed to using broadband technology to redefine the national telecommunications environment. The Australian-owned company is a trailblazer that delivers the cost and convenience of broadband telecommunications to individuals and businesses throughout Australia. For more information, go to www.internode.on.net.

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.

# # #