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SIPquest further augments the industry's most complete set of SIP-based VoIP applications for service providers deploying Internet and Internet telephony services

Release 2.1 delivers additional capabilities to further enhance and simplify service providers' delivery of VoIP services.

Ottawa, Canada - June 8, 2004 - SIPquest Inc., a leading developer of Voice over IP (VoIP) software based on the industry standard Session Initiation Protocol (SIP) today announced the general availability of its latest advancements of its Release 2.0 software. Release 2.1 brings additional functionality to SIPquest's Internet Service Provider (ISP) and Internet Telephony Service Provider (ITSP) customers to facilitate the rapid roll-out of enhanced VoIP services.

SIPquest's application suite allows ISPs and ITSPs to SIP-enable their products and get to market fast without diverting their own development resources. "Our commercially available software helps ISPs and ITSPs get to market fast with SIP-based services - from basic VoIP (voice) service to more complex, service-rich applications like audio, video and data conferencing services. Service Providers can increase their average revenue per user with these new services and differentiate their overall service offerings." said Alain Mouttham CEO SIPquest. "With Release 2.1, we have extended our functionality to include multi-domain support, extended NAT/firewall traversal capabilities, as well as broadening our current support of Red Hat to include Enterprise Linux. New capabilities in Release 2.1 will allow ISPs and ITSPs to track and more easily bill for SIP-enabled pre-paid calling services through our introduction of RADIUS support and a back-to-back user agent."

SIPquest's software suite Release 2.1 new functionality includes:

• multi-domain support
• enhanced NAT/firewall traversal
• RADIUS authentication and accounting support
• back-to-back user agent (B2BUA)
• Red Hat Enterprise Linux support

Release 2.1 delivers the following new benefits to ISPs and ITSPs :

• addition of a new back-to-back user agent (B2BUA) and RADIUS authentication and accounting interface for pre-paid calling card services
• advances in overcoming the NAT/firewall traversal issue faced with most SIP implementations
• multi-domain support allows for multiple companies to be hosted on one server
• extends support to Red Hat 9.0 OS and Red Hat Enterprise, in addition to previous support for Red Hat Linux version 8.0 OS

SIPquest's series of Release 2 components include an advanced Collaboration Agent that functions as a softphone and multimedia client for conferencing, instant messaging and presence; multi-media conferencing services (audio, video and data); a lean and highly-extensible proxy server with call features; voice-mail and auto-attendant; and a scalable SIP-to-H.323 gateway.

About SIPquest

SIPquest is a technology pioneer with specific expertise in Session Initiation Protocol (SIP). SIPquest delivers customers with one of the most comprehensive SIP software application suites that delivers a simplified communication environment and access to multiple VoIP-based communication services including instant messaging, audio conferencing and presence, and other advanced services such as video and data conferencing. By embedding or bundling these SIP-based software products with their own hardware products, telecom and datacom equipment vendors, as well as Internet and Internet Telephony service providers are able to take advantage of the growing demand for Voice over IP (VoIP). SIPquest benefits from an exclusive licensing agreement with Columbia University's Internet Real-Time Lab and Professor Henning Schulzrinne, Chief Scientific Advisor to SIPquest and co-author of SIP. SIPquest is located in Ottawa, Canada.