XO Communications (OTCBB: XOHO) today announced that it has successfully delivered a nationwide IP-based wide area networking solution to HOK Sport Venue Event, a leading architecture firm headquartered in Kansas City, MO. XO's Multiprotocol Label Switching based Internet Protocol Virtual Private Network (MPLS IP-VPN) solution will drive cost savings, enable a new VoIP platform and equip HOK with the network capacity and bandwidth it needs to support future growth.

HOK has designed many of the most popular and recognized sports and convention center facilities around the world, including Busch Stadium, Emirates Stadium, Gillette Stadium, Heinz Field, Nationals Park, Oriole Park at Camden Yards, Pepsi Center, the Phoenix Convention Center, and Wembley Stadium. HOK sought out a managed network solution that would empower the company to focus on its core business while facilitating fast and reliable transfer of bandwidth-intensive Computer-Aided Design and Computer-Aided Manufacturing (CAD CAM) files across their network. The company was also looking to achieve new cost savings by establishing a platform for VoIP services. XO MPLS IP-VPN addresses these issues while providing a solution that should allow HOK to grow without concern for bandwidth availability or needing to continually upgrade its network capacity. Currently, the XO MPLS IP-VPN connects five HOK locations nationwide.

"Collaborating on some of the most innovative sporting venues and convention centers in the country necessitates huge amounts of bandwidth for design sharing, and our previous network infrastructure didn't have the capacity to keep up," said Bobby Johnson, IT network manager at HOK. "Given the scalable nature of the MPLS IP-VPN and the expert management XO provides, HOK can do what we do best -- design and deliver new ideas to our clients."

The XO MPLS IP-VPN solution replaces HOK's prior configuration of Direct Internet Access circuits and provides the company with scalability and significant savings. This scalable network solution provides faster data speeds, establishes a Class of Service-aware IP network that enabled the company's migration to voice over IP, and delivers improved cost-efficiencies by converging voice and data traffic over a single IP network infrastructure.

"HOK is a perfect example of a company that can realize considerable cost savings and increased business performance with the proper network," said Brian Law, sales vice president for the central region at XO Communications. "Our MPLS solution is meeting the demand for a managed solution that provides increased bandwidth and the ability to grow as our customers do. We're proud to offer HOK an innovative, cost-effective solution to support their growth and help them meet their business needs."

XO MPLS IP-VPN

XO MPLS IP-VPN offers businesses and large enterprises a secure, intelligent and managed network to connect offices, customers and partners and converge a wide range of voice, video and data applications over a single IP network infrastructure. XO MPLS IP-VPN provides a wide range of access options to connect locations and flexible Classes of Services to prioritize Internet, intranet, extranet, voice, video and mission-critical business applications -- all over a single, high performance application-aware IP network.

Key benefits of XO MPLS IP-VPN include:

--  Nationwide Coverage -- Broad coverage with service availability in 75
    metropolitan markets across the United States.
--  Flexible and Scalable Network Architecture -- MPLS-based network
    architecture provides a platform for any-to-any connectivity among all
    sites, and allows for quick and easy set up of new sites added to the
    network.
--  Broad Range of Access Options -- Customers can utilize the service
    with Dedicated Internet Access at speeds from T-1 through OC-X and Ethernet
    services.
--  Robust Classes of Service -- Optimize data traffic flows to support
    any type of application with one flat rate for access to all four classes
    of service.
--  Fully Managed -- Reduces total cost of ownership and provides 24x7
    monitoring of network facilities and equipment.
    

For more information about XO MPLS IP-VPN or other XO services go to www.xo.com, or contact an XO sales representative by calling (866) 963-9696.

About HOK Sport Venue Event

HOK Sport Venue Event is one of the world's leading design firms. Their focus is the creation of exceptional gathering spaces, from stadiums and arenas to convention centers and amphitheaters. The firm also has made a worldwide mark managing many aspects of the events themselves, from Olympic Games to Super Bowls. Their architects and event managers are the world's finest and most experienced, drawing from the combined expertise of more than 825 projects with construction value exceeding $20 billion. The company's client list is diverse and comprehensive; it includes 24 Major League Baseball franchises, 30 NFL franchises, 80 professional and civic arena clients, 40 soccer and rugby teams, 120 colleges and universities, 40 convention and performing arts center clients and 30 major events. With offices in Brisbane, Australia; London, England; Beijing, China; Nashville, Tennessee; Knoxville, Tennessee; Denver, Colorado; and Kansas City, Missouri, their reach is worldwide. For more information, visit www.hoksve.com.

About XO Communications

XO Communications, a subsidiary of XO Holdings, Inc. (OTCBB: XOHO), is a leading provider of 21st century communications services for businesses and communications services providers, including Fortune 500 companies and leading cable companies, carriers, content providers, and wireless service providers. Utilizing its unique and powerful nationwide IP network and extensive local metro networks and broadband wireless facilities, XO offers customers a broad range of managed voice, data and IP services in 75 metropolitan markets across the United States. For more information, visit www.xo.com.

Media Contacts:
Chad Couser
XO Communications
703-547-2746
Email Contact
Chris Roche
Brodeur (for XO Communications)
202-775-2675
Email Contact