Voice communication system and redundancy method for call control server
AssigneeIcom Incorporated
InventorAkira Nakano
Life of this patent
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Abstract
Provided is a server system robust against a communication path failure. A first server system 2-1 and a second server system 2-2 are respectively installed on a first network 3-1 and a second network 3-2 provided by common carriers different from each other. The first and second server systems are connected to each other by a dedicated line 6. Even when a failure occurs in the first network, communication through the second network can be maintained, and even when a failure occurs in the second network, communication through the first network can be maintained. Further, when a failure occurs in the dedicated line, operations can be performed within each of the first and second networks in a degeneracy mode.
Claims20
A voice communication system comprising:
- a first server system being installed on a first network and including a first call control server;
- a second server system being installed on a second network separated from the first network and including a second call control server;
- and
- a communication line connecting the first server system to the second server system and being different from the first and second networks, wherein
- the first call control server and the second call control server execute, in parallel, a call control process controlling voice communication between a plurality of communication terminals connected to the first and second networks, and
- a voice signal of the communication terminal in voice communication is transferred through the first and second networks and the communication line.
A method of providing call control server redundancy, the method comprising:
- in a voice communication system including a first server system being installed on a first network and including a first call control server, a second server system being installed on a second network and including a second call control server, and a communication line connecting the first server system and the second server system and being different from the first and second networks,
- during normal operation when communication through the communication line can be performed, causing the first call control server to operate in an active mode actually providing call control service and causing the second call control server to operate in a standby mode that, when the first call control server in the active mode goes down, becomes the active mode in place of the first call control server;
- and,
- during a failure when the communication line is down, causing the second call control server to operate in the active mode along with the first call control server.
Dependencies are inferred from the claim text.