BT has expanded its BT Onevoice converged voice platform, in a bid to drive the adoption of communications applications to the desktop in large businesses.
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The company has launched SIP trunking in a number of countries, which it claims will deliver a migration path to unified communications.
SIP trunking provides connectivity between domestic country voice services and BT's Onevoice global VPN to help customers deploy converged applications.
It enables a business to use its existing PBX with voice over IP (VoIP) to enable staff to make and receive calls via the public switched telephony network (PSTN), over the corporate IP network
BT said the service offers local numbering for both outgoing and incoming call traffic, which can be delivered anywhere on a user's network.
Already available in the UK, the services will be rolled out to the Netherlands, Belgium, Germany, France and the US in the coming months, with further regions, including Spain, to follow.
According to BT, by utilising SIP trunking, customers can reduce rental for access lines, reduce call costs, and improve collaboration for users, whether they be office based, on the move or based remotely.
With the two products users can streamline communications by combining presence and instant messaging interoperability with BT Onevoice conferencing, and software-powered VoIP in a single, unified platform.