VONAGE Releases Xten's X-PRO SoftPhone for Mac OS X

Vonage's cutting edge Voice over IP service now available for Mac users

Edison, NJ, and Santa Clara, CA, June 24, 2004 - Vonage, the leading
broadband telephony provider in the U.S., and Xten Networks (OTCBB: 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
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 www.vonage.com and retail partners
such as Amazon.com, RadioShack, Best Buy and Circuit City. Wholesale
partners such as EarthLink, ARMSTRONG, 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 www.vonage.com or call 1-VONAGE-HELP.