According to the 2015 IHS Infonetics SIP Trunking North American Service Provider Scorecard, XO leads the top tier of SIP trunking providers with the largest installed base of SIP connectivity trunks.

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Press Release
October 08, 2015
XO Communications has the Largest Installed Base of SIP
Connectivity Trunks in the United States
HERNDON, Va. – October 8, 2015 – As part of its comprehensive portfolio of voice-related services, XO
Communications (XO) leads the top tier of Session Initiation Protocol (SIP) trunking providers with the largest
installed base of SIP connectivity trunks, according to the 2015 IHS Infonetics SIP Trunking North American
Service Provider Scorecard. The scorecard is published by industry analyst firm Infonetics Research, now IHS
(NYSE: IHS).
XO SIP trunking solves classic business challenges by combining voice, data and Internet access over a single IP
connection and integrating innovative unified communications and business continuity capabilities through its
network.
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2. “Businesses today need to simplify operations, reduce costs and increase productivity,” said Jake Heinz, senior
vice president of marketing and product at XO Communications. “With XO SIP, businesses can capitalize on a
wide variety of unified communications applications that cost-effectively boost worker productivity. We are
experiencing brisk demand for our SIP trunks that enable businesses to reduce costs, simplify management and
leverage productivity while maximizing the value of IT and network investments.”
IHS Research Director Diane Myers wrote the seventh annual IHS Infonetics SIP Trunking North American
Service Provider Scorecard, which was published August 7, 2015. Excerpts are available at:
http://www.infonetics.com/pr/2015/SIP-Trunking-Service-Provider-Scorecard.asp.
XO serves more than 2,900 cities and 80 percent of the major metropolitan markets across the United States with
VoIP and SIP trunking services.
“The IP voice business has been a shining star for XO, as the provider has done an excellent job of upgrading its
installed base of customers to SIP, in addition to effectively marketing its service to new businesses of all sizes,”
said Myers.
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About XO Communications
XO Communications provides the technology that helps business and wholesale customers compete in a hyper-
connected economy. In the U.S., XO owns and operates one of the largest IP and Ethernet networks that
customers rely on for private data networking, cloud connectivity, unified communications, and voice, Internet
access, and managed services. To learn more about XO Communications, visit www.xo.com or blog.xo.com. XO
Communications is also on Twitter and LinkedIn.
Press Contacts:
XO Communications
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