System and method for monitoring call flow in heterogeneous environments
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United States of America Patent
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Oct 30, 2012
Grant Date -
May 13, 2010
app pub date -
Nov 7, 2008
filing date -
Nov 7, 2008
priority date (Note) -
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Abstract
The call states of all devices in a call are monitored and reported even when the devices belong to networks that use different types of call identifiers. A first device and a second device are different types of devices selected from a group of types comprising: a legacy device type, a SIP basic device type, and a SIP advanced device type. In response to a request from an application to monitor the first device and a request to establish a call between the first device and the second device, a Universal Call Identifier (UCID) is generated for the call and the call is established. A request to monitor the second device is sent using the UCID. When a change in the call state of the second device is detected, the change of the call state is reported to the application based on the UCID.
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