System and method for call re-direction in H.323 network
AssigneeEricsson Inc.
InventorsJanette Chen Lin, Sridhar Kolar
Life of this patent
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Abstract
A telecommunications system and method is disclosed for re-directing failed calls to H.323 endpoints within an H.323 system by adding a unique re-routing release cause to a Release Complete message in the H.225 protocol that indicates that the call should be re-routed to another number. The Gatekeeper within the H.323 system stores the alternative number for the H.323 endpoint, and upon reception of this new re-routing cause in the Release Complete message, the Gatekeeper establishes a new leg of call to the alternative number.
Claims20
A telecommunications system for re-routing a call to an H.323 subscriber within an H.323 system, comprising:
- an H.323 endpoint within said H.323 system for receiving said call to said H.323 subscriber and transmitting a Release Complete message including a re-routing cause indicating said call should be re-routed to an alternative number for said H.323 subscriber in response to said call not being answered at said H.323 endpoint;
- a database for storing said alternative number for said H.323 subscriber;
- and
- a Gatekeeper within said H.323 system for receiving said Release Complete message including said re-routing cause from said H.323 endpoint, accessing said database to retrieve said alternative number in response to receipt of said re-routing cause and re-routing said call to said alternative number to complete said call.
A method for re-routing a call to an H.323 subscriber, comprising the steps of:
- receiving said call to said H.323 subscriber at a Gatekeeper within an H.323 system associated with said H.323 subscriber;
- routing said call from said Gatekeeper to an H.323 endpoint associated with said H.323 subscriber;
- in response to failure of said H.323 subscriber to answer said call at said H.323 endpoint, receiving a Release Complete message including a re-routing cause indicating said call should be re-routed to an alternative number for said H.323 subscriber at said Gatekeeper;
- in response to receipt of said Release Complete message including said re-routing cause, accessing a database, by said Gatekeeper, to retrieve said alternative number for said H.323 subscriber;
- and
- re-routing said call from said Gatekeeper to said alternative number to complete said call.
A method for indicating that a call to an H.323 subscriber within an H.323 system should be re-routed, comprising the steps of:
- receiving said call to said H.323 subscriber at an H.323 endpoint associated with said H.323 subscriber;
- determining whether said call can be completed to said H.323 subscriber at said H.323 endpoint;
- and
- in response to said call not being completed to said H.323 subscriber at said H.323 endpoint, transmitting a Release Complete message including a re-routing cause from said H.323 endpoint to a Gatekeeper within said H.323 system, said re-routing cause indicating that said call should be re-routed to an alternative number associated with said H.323 subscriber to complete said call.
Dependencies are inferred from the claim text.