Voice over IP architecture
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United States of America Patent
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Oct 18, 2011
Grant Date -
Feb 8, 2007
app pub date -
Oct 16, 2006
filing date -
Oct 19, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A Voice over Internet Protocol (VoIP) network is described in which session state is maintained in access switches, but not signaling gateways which maintain transaction state only during pendency of a related transaction. The signaling gateway further provides transparent inter-operation between the VoIP network and non-IP networks, such as the PSTN, by means of a translator which directly translates messages between the networks.
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