Vonage(R) Releases Xten's X-PRO SoftPhone for Mac OS X Vonage's cutting edge Voice over IP service now available for Mac users EDISON, N.J. and SANTA CLARA, Calif., June 24 /PRNewswire-FirstCall/ -- Vonage, the leading broadband telephony provider in the U.S., and Xten Networks (OTC:XNWK) (BULLETIN BOARD: XNWK) , publisher of the award winning X-PRO SoftPhone, announced today that Vonage and Xten have completed interoperability testing of an OEM version of Xten's X-PRO SIP SoftPhone for Mac-based Vonage subscribers. Mac users can now download the Vonage X-PRO for the Mac OS X SoftPhone to start making and receiving telephone calls immediately on their computers, while maintaining the same quality of service they have come to expect from Vonage. Road Warriors using the Vonage X-PRO SoftPhone for Mac OS X can access the Vonage service from almost any Internet connected personal computer. The Vonage X-PRO SoftPhone provides increased mobility of the Vonage service; this along with the feature-rich X-PRO's ease-of-use, make it a winning combination. "We are really excited to partner with Xten to offer our Mac-based customers the best soft phone on the market," said Michael Tribolet, Vonage's executive vice president of Operations. "This offering underscores our commitment to our customers who requested Mac availability for one of the most cutting edge applications, which is replete with great features and prices." "VoIP services have come a long way since the mid-nineties and to see them replacing circuit-switched primary line services marks a new era for the telephone," said Erik Lagerway, co-founder and Chief Operating Officer of Xten Networks, Inc. "Xten is proud to have Vonage as a customer and we are excited about the opportunities this new partnership will foster." About Vonage(R) Vonage is redefining communications by offering consumers and small businesses an affordable alternative to traditional telephone service. The fastest growing telephony company in North America, Vonage's service area encompasses more than 1900 active rate centers in over 125 North American markets. Vonage is sold directly through http://www.vonage.com/ and retail partners such as Amazon.com, RadioShack, Best Buy and Circuit City. Wholesale partners such as EarthLink, ARMSTRONG(R), Advanced Cable Communications and the Coldwater Board of Public Utilities resell the Vonage broadband phone service under their own unique brands. With more than 175,000 lines in service, Vonage continues to add more than 20,000 lines per month to its network. Over 5 million calls per week are made using Vonage, the easy-to-use, feature-rich, flat rate phone service. Vonage is headquartered in Edison, New Jersey. For more information about Vonage's products and services, please visit http://www.vonage.com/ or call 1-VONAGE-HELP. Vonage(R), Vonage Digital VoiceTM, Toll Free PlusSM and Virtual Phone Number(SM) are trademarks of Vonage Holdings Corp. About Xten(R) Networks, Inc. Xten is a provider of award-winning, high-quality, carrier-grade SIP-based VoIP software and softphones. Xten's goal is to be the primary choice in SIP- based client-side audio and video IP communications software for Telecoms, Cable Providers and Internet Telephony Service Providers. Those who are interested in Xten products should visit sales.xten.com . On the Web: http://www.xten.com/ . DATASOURCE: Vonage; Xten Networks, Inc. CONTACT: Mitchell Slepian of Vonage, +1-732-528-2677, ; Mark Bruk, CEO of Xten Investment Opportunities, +1-408-876-4344, Web site: http://www.vonage.com/ http://www.xten.com/

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