Global Crossing Ltd. (GLBC) and Sprint Nextel (S) are the first SIP trunking service providers qualified for use with Microsoft Office Communications Server 2007 Release 2, the latest version of Microsoft Corp.’s unified communications platform announced Tuesday.
SIP trunking is the de facto interconnection standard for VoIP calling applications, serving as an alternative to circuit-based fixed lines on the PSTN. SIP trunking can offer enterprise customers cost savings from the elimination of gateways, ISDN facilities, and the convergence of voice and data traffic.
Global Crossing’s suite of VoIP services supporting OCS 2007 R2 include domestic and international long distance, toll-free and local. In addition, Global Crossing is offering a combination of advanced interoperability testing and customized VoIP engineering consulting services.
Sprint SIP Trunking builds upon MPLS technology as an enabler for VoIP, and allows IP PBXs to deliver the features and functionality of combined local LEC and long distance provider services along with Class of Service support of other real-time data.
While available now to support an Office Communications Server 2007 R2 customer deployment, Sprint SIP Trunking will be generally available to all businesses in mid-2009.