Invention Application
US20090097619A1 SYSTEM AND METHOD FOR CONVEYING END-TO-END CALL STATUS 有权
用于传送端到端呼叫状态的系统和方法

SYSTEM AND METHOD FOR CONVEYING END-TO-END CALL STATUS
Abstract:
A system that incorporates teachings of the present disclosure may include, for example, a Unified Messaging System having a controller element to submit to a Calling Card Server (CCS) over a primary call leg a Session Initiation Protocol (SIP) SUBSCRIBE message requesting outdial event notification for a call placed on a secondary call leg responsive to a reply of a voicemail message, and receive over the primary call leg a SIP NOTIFY message from the CCS indicating outdial events associated with placing the call over the secondary call leg. Additional embodiments are disclosed.
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