Office Communications Server 2007 R2 simplifies and reduces the cost of deploying Enterprise Voice by enabling an enterprise to connect its voice network to a service provider offering PSTN origination and termination. This capability, a variety of what is known in the telecommunications industry as SIP trunking, means that enterprises do not need to deploy IP-PSTN gateways in order to enable PSTN connectivity.

The Office Communications Server 2007 R2 SIP trunking capability enables the following scenarios:

See Also