The Nokia Rapport™ for Large Enterprise Session Management (SM) solution provides a centralized session switching and routing function that supports traditional enterprise communications platforms, such as PBXs, and next-generation enterprise communications systems, with added, network-based, subscriber-level routing and features. It is the equivalent of owning your own session initiation protocol (SIP) trunking platform to deliver SIP trunking to your devices and locations. Rapport Session Management delivers a centralized dialing plan for PBXs and common services capabilities to enable communications applications.