Sprint announced SIP Trunking availability in 12 European countries: Austria, Belgium, Denmark, France, Germany, Ireland, Italy, Netherlands, Spain, Sweden, Switzerland and the United Kingdom.
Session Initiative Protocol (SIP) Trunking allows businesses to replace costly "physical trunks" that connect a PBX to a service provider network with "virtual trunks" over a single IP connection. Distributed enterprise can connect multiple locations throughout Europe over the same set of SIP trunks while preserving local telephone numbers, calling plans and emergency services. This reduces the overall number of trunks needed to implement SIP Trunking in the available European locations, thus streamlining the network and operating costs for a business.
The service runs over Sprint's international MPLS network. Sprint first launched SIP Trunking in 2009.
http://newsroom.sprint.com/news-releases/sprint-extends-sip-trunking-for-businesses-to-12-european-countries.htm