Ingate Systems Joins Pingtel's Ecosystem Partner Program as Key Provider of SIP-Capable Firewalls and NAT Traversal Solutions

Ingate completes certification of Ingate Firewalls and SIParators with SIPxchange to provide NAT traversal and seamless interoperability while maintaining superior control and security at the enterprise network edge

VON Europe 2005,Stockholm, May 23, 2005- Ingate® Systems www.ingate.com, whose award-winning security products enable enterprises to solve the problem of letting Session Initiation Protocol (SIP) traverse their firewalls and Pingtel Corp., the leading provider of open source, commercial-grade enterprise communications solutions, today announced that Pingtel has completed certification of Ingate Firewall® and Ingate SIParator® products and that Ingate has joined the Pingtel Ecosystem Partner Program as a key provider of SIP-capable firewalls and Network Address Translation (NAT) traversal solutions.

Ingate's SIP-capable Firewalls and SIParators are now fully certified to work with Pingtel.s award-winning SIPxchange., the enterprise SIP PBX for Linux. SIPxchange is the industry's only 100 percent SIP, 100 percent open source enterprise communications platform. By certifying interoperability with Pingtel's SIPxchange, Ingate delivers a key component to enterprise customers and channel partners looking to solve NAT traversal while maintaining superior control and security at the enterprise network edge.

"Joining Pingtel's Ecosystem Partner Program, and the company's certification of Ingate's SIP-enabling Firewalls and SIParators, addresses one of the most critical issues facing technology vendors in this space: interoperability" said Olle Westerberg, Chief Executive Officer, Ingate Systems."In addition, Ingate products solve NAT traversal and deliver unprecedented control of SIP traffic. These advantages, combined with proven interoperability with Pingtel.s SIPxchange, offer enterprise customers and channel partners a tremendous advantage in choosing our products."

Pingtel's ecosystem of partner's hardware includes analog telephone adapters, gateways and other SIP-based enterprise communications products from innovative equipment vendors such as Ingate. Pingtel adds provisioning support via its browser-oriented management console to further simplify the provisioning process. Solution providers and end customers around the world can freely combine ecosystem partner components with SIPxchange to create the ultimate enterprise communications system based on price and performance.

"Ingate has long been known for the quality of their SIP-enabling products and solutions for NAT traversal and they deliver real value to our customers and channel partners looking to build best-in-breed enterprise communications applications," said William J. Rich, president and CEO, Pingtel."We at Pingtel are excited to introduce our channels and customers to Ingate.s fully certified and supported line of Firewalls and SIParators and to leverage their expertise and experience as we uncover new opportunities and markets."

Products certified as part of Pingtel.s Ecosystem Partner Program undergo a rigorous testing and documentation program in Pingtel.s test lab to ensure interoperability between the product and SIPxchange. For each product, Pingtel.s certification engineers create and execute a specific test plan that covers three areas of interoperability . SIP compliance, usability and feature compatibility. The SIPxchange documentation details all the steps required for a successful installation of Pingtel certified Ecosystem components. This ensures that end users can quickly configure Ecosystem products with SIPxchange in the field. Pingtel regularly retests vendor products to ensure interoperability is being maintained. Finally, Pingtel supports certified components when used in conjunction with SIPxchange.

About Ingate® Systems

A world leader in next generation firewall technology, Ingate® Systems produces and sells the world's only fully SIP-capable enterprise firewalls and the Ingate SIParator®, a device that connects to an existing network firewall to seamlessly enable the traversal of SIP communications and three-time winner of Internet Telephony magazine's Product of the Year Award. Ingate Firewalls solve the NAT traversal issues inherent in using SIP, and address the growing need for SIP-capable firewalls among enterprise users. Ingate Systems has a long history of developing secure communications technology and today offers enterprises unprecedented value and ability to develop SIP-based, person-to-person realtime communications. Ingate's security products currently protect the networks of retail companies, financial institutions, industrial firms, government agencies and small-to-large enterprises throughout Europe, Asia and North America. Ingate's principal shareholders are Intertex Data AB and Bell Net Corp. Ingate Systems AB is located in Stockholm and Linköping, Sweden. Its wholly-owned subsidiary, Ingate Systems Inc., is located in Hollis, New Hampshire. For more information on Ingate Systems, visit www.ingate.com.

About Pingtel Corp.

Pingtel is reshaping the communications market by delivering the first enterprise-class SIP PBXs, SIP call managers/routers and SIP softphones based on 100% SIP, 100% open source software. Offering enterprise-class communications applications under Linux-style subscription licenses, Pingtel combines the best attributes of open source development . low cost, adaptability and flexibility . with the reliable solutions and support enterprises require for voice applications. Pingtel.s open source SIP PBX is the linchpin technology that will catalyze the movement of enterprise communications into the data center and away from purpose-built hardware. Like enterprise-grade Linux, this approach will drive commoditization of traditional telephony hardware and software and eliminate vendor lock-ins that keep prices high and limit innovation. For more information, visit www.pingtel.com.

For more information, please contact:

Johan Terve, Vice President, Sales, Ingate Systems AB
+46-70 202 53 00
johan@ingate.com

Hillary Call, Public Relations Manager, Ingate Systems
(917) 414-9262
hillary@ingate.com