XO Communications Launches Voice Termination Service for VoIP Providers [February 14, 2005]

RESTON, Va., Feb 14, 2005 /PRNewswire-FirstCall via COMTEX/ -- XO Communications, Inc. (OTC Bulletin Board: XOCM.OB) today announced the availability of its termination service for service providers that offer voice over Internet Protocol (VoIP) services to businesses and consumers. XO VoIP Termination allows service providers to terminate voice calls to domestic locations in the United States using softswitch technology deployed across the XO national IP network. XO VoIP Termination is one of several new XOIP services that will leverage the company's national IP network and softswitch technology to offer business and carrier customers next-generation IP-based voice and data services.

XO VoIP Termination enables broadband telephony providers and cable companies to hand over their VoIP traffic directly to XO for termination to the public switched telephone network. With an IP connection to the XO IP network, the customer's voice traffic will be routed across the XO OC-192 class of service-enabled network at the highest level of priority. The traffic passes through an XO softswitch gateway and is carried across the XO IP network to an XO softswitch gateway nearest the final destination of the call. The traffic is then converted by an XO softswitch to a format accepted by the terminating local service provider.

"This service demonstrates our commitment to being a leading provider of VoIP services," said Ernie Ortega, president of carrier sales at XO Communications. "As the industry moves more toward an IP environment for delivering voice calls, XO is well positioned to provide the IP infrastructure that allows our customers to take full advantage of VoIP. For more than four years XO has relied on its own IP network and softswitch technology to transport customers' voice traffic, and this expertise makes XO an ideal provider of VoIP-enabling services to our carrier customers."

XO VoIP Termination Service has the following features:
* Session initiation protocol (SIP) signaling
* Session border controller for network and application level security
* XO IP network transit via XO Dedicated Internet Access, Fast
Ethernet/Gigabit Ethernet
* Service level agreements for interconnection transport
* Domestic voice traffic termination in 48 states
* 24x7 network management and proactive network monitoring
* Interconnection and usage reporting

XO has one of the industry's largest deployments of Sonus Networks softswitches, which provides an IP-based switching platform to support both traditional circuit-switched voice traffic and packet-based VoIP traffic. Four years ago XO began implementing VoIP technology in its national IP network with the deployment of softswitch technology from Sonus Networks, the leading provider of VoIP infrastructure solutions. Today, XO has deployed Sonus softswitches in forty-four markets and delivers more than 600 million minutes of customer long distance traffic each month across its national IP network.

About XO Communications
XO Communications is a leading provider of national and local telecommunications services to businesses, large enterprises and telecommunications companies. XO offers a complete portfolio of services, including local and long distance voice, dedicated Internet access, private networking, data transport, and Web hosting services as well as bundled voice and Internet solutions. XO provides these services over an advanced, national facilities-based IP network and serves more than 70 metropolitan markets across the United States. For more information, visit http://www.xo.com.

SOURCE XO Communications, Inc.