(OTCBB:XOHO) XO Holdings, Inc. just released some important news.

M2 PRESSWIRE-10 December 2008-Stockwire.com: (OTCBB:XOHO) XO Holdings, Inc. just released some important news.(C)1994-2008 M2 COMMUNICATIONS LTD

RDATE:10122008

(OTCBB:XOHO) XO Holdings, Inc. - XO Communications and Digium(R) Announce Interoperability Certification

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Communications and Digium(R) Announce Interoperability Certification (OTCBB:XOHO) XO Holdings, Inc.

Certification Ensures Interoperability of Digium's Award-Winning Switchvox IP PBX With XO's Award-Winning SIP Converged VoIP and Data Solution

HERNDON, VA and HUNTSVILLE, AL-Dec 9, 2008 - XO Communications and Digium , the Asterisk Company, recently announced that Digium's Switchvox IP PBX has been certified to work with XO's award-winning Session Initiation Protocol trunking solution, XO SIP. The certification will streamline the adoption of XO SIP by users of the award-winning Switchvox telephony system and offer them a cost-effective and efficient way to connect to the public phone network without having to rely on traditional land lines.

recently's announcement begins a collaboration between two leading providers of VoIP services and solutions for businesses. recently, more than 15,000 businesses and more than 500,000 customer employees benefit from VoIP services offered by XO through its portfolio of converged services, which includes XO SIP and XO IP Flex. Digium's Asterisk is the world's most widely used open source telephony software, and Switchvox is the most widely used customer premise-based IP PBX based on Asterisk.

"Businesses are looking for both high-performance and cost-effective VoIP solutions that are easy to deploy and manage," said Nicola Jackson, director of voice and converged services for XO Communications. "Together, Digium's feature-rich Switchvox platform and XO SIP offer an affordable, high-quality VoIP solution that businesses can deploy rapidly. Completing interoperability with Digium Switchvox platform enables us to offer businesses more options when selecting their SIP trunking services provider."

The certification confirms that Switchvox and XO SIP work seamlessly together, providing businesses with confidence when using their feature-rich, easy-to-use, inexpensive Switchvox phone system with XO SIP.

"Companies that want to integrate voice and data with Switchvox are now assured of full interoperability when they select XO for their IP network," said Leslie Conway, vice president of global marketing for Digium. "SMBs and solution providers want certified solutions that have been thoroughly tested. Formal XO certification now provides them with a high level of confidence in choosing Digium and XO as a combined solution for their network needs."

XO SIP

XO SIP is a fully integrated solution designed to support the needs of businesses with the most demanding voice and data applications at single or multiple locations. XO SIP uses Session Initiation Protocol signaling and a native IP-based facility to manage all traffic between a customer's IP PBX system, the XO IP network, and the Public Switched Telephone Network. The service provides greater efficiencies by eliminating the need for businesses to maintain multiple access facilities for voice and data services and eliminates the need for bandwidth-consuming protocol conversions.

XO SIP includes a broad range of bandwidth options to maintain optimal network performance and has the following features:

- Dedicated Internet access with dynamic bandwidth allocation

- Unlimited local calling

- Unlimited site-to-site calling for multi-location customers with IP Flex, IP Flex with VPN and XO SIP locations

- Long distance calling with choice of calling plans

- Optional Voice Compression

- Online Feature Management through the XO Business Center

Switchvox

Switchvox provides a full-featured telephony system that integrates with key CRM applications such as Salesforce.com and SugarCRM through Switchvox's SMB Switchboard interface. Switchvox delivers the benefits of integrating voice with data by enabling customers to create custom mashups that leverage other Web applications in seconds, with no programming knowledge required. The product equips small, midsize and growing businesses with a telephony solution that costs a fraction of the price of traditional phone systems.

About XO Communications

XO Communications, a subsidiary of XO Holdings, Inc. , is a leading nationwide provider of advanced communications services and solutions for businesses, enterprises, government, carriers and service providers. Its customers include more than half of the Fortune 500, in addition to leading cable companies, carriers, content providers and mobile network operators. Utilizing its unique combination of high-capacity nationwide and metro networks and broadband wireless capabilities, XO offers customers a broad range of managed voice, data and IP services with proven performance, scalability and value in more than 75 metropolitan markets across the United States. For more information, visit www.xo.com.

About Digium

Digium , Inc., the Asterisk Company, created, owns and is the innovative force behind Asterisk, the most widely used open source telephony software. Since its founding in 1999, Digium has become the open source alternative to proprietary communication providers, with offerings that cost as much as 80 percent less. Digium offers Asterisk software free to the open source community and offers Asterisk Business Edition and Switchvox IP PBX Software to power a broad family of products for small, medium and large businesses. The company's product line includes a wide range of hardware to enable resellers and customers to implement turnkey solutions or to design their own voice over IP systems. More information is available at www.digium.com.

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