System and method for conveying end-to-end call status

摘要

A system that incorporates teachings of the present disclosure may include, for example, receiving a session initiation protocol (SIP) subscribe message over a primary call leg requesting outdial event notification on a secondary call leg. Receiving of the call is responsive to a unified messaging system placing a call outside of its local access and transport area. A call is placed on the secondary call leg responsive to receiving outdial information on the primary call leg. Alternative outdial information directed to the calling party is received responsive to the call on the secondary leg being unanswered. Another call is placed on the secondary leg responsive to receiving the alternative outdial information without requiring receipt of another SIP subscribe message over the primary call leg. A calling card server performs SIP messaging associated with one of the SIP notify message or the SIP subscribe message. Other embodiments are disclosed.

主权项

1. A non-transitory machine-readable storage medium, comprising executable instructions which, responsive to being executed by a processor, cause the processor to facilitate performance of operations comprising:
receiving from a unified messaging system a session initiation protocol subscribe message over a primary call leg requesting outdial event notification on a secondary call leg responsive to the unified messaging system placing a call outside of its local access and transport area, wherein the unified messaging system operates in an internet protocol multimedia subsystem network, and wherein the primary and the secondary call legs bypass the internet protocol multimedia subsystem network; placing a call on the secondary call leg responsive to receiving, on the primary call leg, outdial information from the unified messaging system, wherein receiving the outdial information is responsive to an autodial request to a voicemail message of the unified messaging system, and wherein the outdial information is directed towards a calling party of the voicemail message; and submitting a session initiation protocol notify message to the unified messaging system that indicates outdial events associated with call status of the call on the secondary call leg; and responsive to the call on the secondary leg being unanswered:
receiving alternative outdial information directed to the calling party of the voicemail message; andplacing another call on the secondary leg responsive to receiving the alternative outdial information, wherein the placing of the other call does not require receiving from a unified messaging system another session initiation protocol subscribe message over the primary call leg requesting outdial event notification on the secondary call leg, wherein a calling card server performs session initiation protocol messaging associated with one of the session initiation protocol notify message or the session initiation protocol subscribe message, and wherein the call is placed on a voice over internet protocol network that produces the outdial events.