Xten Working with Plantronics to Offer Enhanced VoIP Solutions Companies see opportunity for delivering high-end VoIP solutions SANTA CLARA, CA, Sept. 23 /PRNewswire-FirstCall/ -- Xten (OTCBB: XNWK), a provider of VoIP (Voice over IP) and Video over IP SIP softphones, today announced that they will work with Plantronics, the world leader in communications headsets, to offer enhanced VoIP solutions, combining Xten's softphones with Plantronics full line of PC headsets. Both companies will feature links on their respective web sites. "Xten softphones represent some of the best technology in IP telephony today," stated Joe McGrogan, product marketing manager for Plantronics. "Combining our headsets and Xten's softphones offers consumers, road-warriors and enterprise users, excellent sound quality, comfort and convenience for IP-based communications." "We are excited to work with Plantronics to pursue a host of opportunities, anywhere users need access to high-end video and voice over IP solutions," said Erik Lagerway, president and chief operating officer of Xten Networks, Inc. Xten's softphones are carrier-grade IP telephony SIP endpoints, delivering the quality of service and features that large providers require to serve their customer base. Xten has a feature-rich FREE SIP softphone dubbed X-Lite, in addition to the fully featured X-PRO commercial softphone. Xten's softphones are fully RFC3261 (SIP), RTP/RTCP (RFC 1889) and SDP (RFC 3264) compliant. They are available for Windows (Windows 98SE/ME/NT 4/2000/XP/CE), Mac OS X and Pocket PC operating systems. By choosing to deploy video and voice over IP softphones based upon the SIP standard, Xten delivers a suite of products which integrate with and interoperate with some of the largest IP telephony networks in the world. Therefore, large telecom providers, cable operators and Internet telephony service providers can cost-effectively deliver IP telephony service to consumers using Xten products interconnected with their existing telecom networks. About Xten Networks, Inc. Xten is a developer of award-winning, high-quality, carrier-grade VoIP (Voice over IP) and Video over IP SIP softphones for service providers, cable operators, Internet telephony service providers, IP PBX manufacturers and OEMs. Through its deployments with leading service providers, Xten has more than 400,000 IP endpoints deployed worldwide. For more information please visit http://www.xten.com/. You may also visit Xten COO, Erik Lagerway's blog at http://www.sipthat.com/. For more information, contact: Investor Relations Public Relations Mark Bruk Justin Siefert Xten Networks, Inc. Calysto Communications (408) 876-4344 (404) 266-2060 x20 DATASOURCE: Xten Networks Inc. CONTACT: Investor Relations: Mark Bruk, Xten Networks, Inc., (408) 876-4344, ; Public Relations: Justin Siefert, Calysto Communications, (404) 266-2060 x20,

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