XO Communications announced that it carried more than 2.9 billion minutes of voice over Internet Protocol (VoIP) traffic across its nationwide IP network in the first quarter of 2006, a 32 percent increase over the previous quarter. The increase was driven by greater deployment of XO's VoIP solutions by businesses and service providers, demonstrating the increasing growth of delivering voice services over an all IP environment.



"As a leading provider of IP services to businesses and service providers, XO is helping pave the way for the wider adoption of voice over IP," said Carl Grivner, CEO of XO Holdings. "As demand for our business and wholesale voice over IP services grows, we expect the amount of voice traffic supported by the XO IP network to continue to increase at a rapid pace as our customers look to take advantage of the increasing opportunities and benefits of managing their voice traffic over an all IP infrastructure."

"XO has helped us provide reliable, best-of-breed Internet phone service to customers nationwide," said Rob Mainor, chief operations officer at SunRocket. "The reach and reliability of the XO IP network and solutions have allowed us to seamlessly scale as we've become one of the fastest growing Internet phone service providers in the U.S."

XO's broad suite of commercial and wholesale VoIP solutions is delivered over an advanced softswitch IP network platform powered by Sonus Networks and Juniper Networks. This VoIP platform delivers both traditional circuit- switched voice traffic and packet-based VoIP traffic, allowing XO to support customers that continue to rely on time division multiplexing (TDM) technology and those that have migrated to more advanced, IP-based voice technology. By managing the VoIP platform over its private IP network, XO helps customers avoid the congestion and delays of the public Internet - ensuring that customers' voice traffic is delivered with the same quality and reliability of traditional telephone networks.

For carriers and service providers, XO offers a full suite of wholesale services, including VoIP origination, VoIP termination, IP transit, wholesale local voice, long distance termination and multi-market local inbound calling services. For business customers of all sizes, XO offers a wide range of voice services including local voice, dedicated and switched long distance, interactive voice response, and its award-winning VoIP services bundle, XOptions Flex. Since its introduction in April 2005, more than 3,000 businesses have seamlessly moved into the IP world by taking advantage of XOptions Flex's fixed price, high performance service package.

For more information about XO's services for businesses, carriers and service providers, contact an XO sales representative by calling (866) 963-9696 or visit http://www.xo.com.