Communication system supporting two-way on-hold functionality
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United States of America Patent
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N/A
Issued Date -
Nov 30, 2006
app pub date -
May 31, 2005
filing date -
May 31, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A communication system and method include a first user agent initiating a telephone call to a second user agent. An intermediary agent establishes a first connection to the first user agent and a second connection to the second user agent. If the intermediary determines that the second user agent has placed the first user agent on hold, the intermediary terminates the first connection while maintaining the second connection on behalf of the first user agent. When the second user agent becomes available, it informs the intermediary. The intermediary then determines the availability of the first user agent. If the first user agent is available, it is connected to the second user agent. The agents preferably communicate over an IP network using session initiation protocol (SIP) compliant messages. The agents and the intermediary are configured to differentiate between a SIP message having a voice capable session description and a SIP message having an on-hold session description.
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