STOCKHOLM and MOUNTAIN VIEW, CA, October 18, 2004 - Ingate Systems AB, which produces and sells the world's only fully Session Initiation Protocol (SIP)-capable enterprise firewalls, and LignUp Corporation, a leading provider of SIP-based voice applications and software infrastructure for the enterprise, today announced that the two companies have completed interoperability testing with LignUp ProPBX, a software-only SIP-PBX, and Ingate Firewall and Ingate SIParator products. LignUp will showcase an integrated Ingate-LignUp VoIP platform solution in the LignUp Hospitality Suite, in the Kent Room of the Sheraton Boston Hotel, during this week's Fall VON 2004 Conference and Exposition in Boston, MA.

"The completion of interoperability testing between LignUp and Ingate products represents a milestone for companies that want to leverage VoIP, IM and other SIP-based applications," said Steve Johnson, President, Ingate Systems. "SIP-based communications do not reach users behind firewalls and NATs automatically. Ingate's fully SIP-capable firewalls solve this problem. These interoperable solutions offer customers a truly complete end-to-end solution."

"This interoperability effort with Ingate demonstrates LignUp's commitment to delivering secure VoIP solutions built on the open SIP industry standard," said Kevin Nethercott, President and COO, LignUp Corp. "By integrating these SIP-enabled LignUp-Ingate solutions, customers can realize the VoIP benefits of reduced costs, improved productivity, and enhanced business processes, with the confidence that business-critical, network assets are protected. LignUp will continue to work with leading providers of SIP devices so that enterprises can deploy solutions that best meet their needs."

Ingate's Firewalls and SIParator products allow the enterprise to quickly add support for real-time communications based on SIP, the standard protocol for VoIP, instant messaging, presence and a host of person-to-person applications. The SIParator, a device that connects to an existing network firewall to seamlessly enable the traversal of SIP communications, earned Internet Telephony magazine's Product of the Year Award in 2002 and again in 2003. LignUp's portfolio of solutions includes SIP-PBX, SIP-Centrex, Voice Mail, Unified Messaging and Outbound Calling applications developed on the LignUp Communications Infrastructure. The software only, standards-based, web services-oriented LignUp Communications Infrastructure enables cost-effective development and fast deployment of multiple voice and voice-enabled business applications on a common communications platform.

About Ingate Systems
A world leader in next generation firewall technology, Ingate Systems produces and sells the world's first 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 winner of Internet Telephony magazine's Product of the Year Award in 2002 and again in 2003. 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 real-time 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. Majority-owned by Intertex Data AB and BellNet Corp, Ingate Systems AB is located in Stockholm and Linkping, 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 LignUp
LignUp Corporation is a leading provider of software only, SIP based Voice Applications and Infrastructure for enterprises. The LignUp applications portfolio includes SIP-PBX, SIP-Centrex, Voice Mail, Unified Messaging and Outbound Calling applications developed on the LignUp Communications Infrastructure, a software only, standards-based, web services-enabled platform. This infrastructure facilitates the cost-effective development and flexible deployment of multiple voice and voice enabled business applications. With LignUp Applications and LignUp Communications Infrastructure, systems integrators, network integrators and service providers have quickly assembled differentiated, cost competitive solutions for enterprise customers. A privately held company, LignUp is based in Mountain View, California and has offices in Salt Lake City, Shanghai and Tokyo. More information on LignUp can be found at www.LignUp.com.

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