Dual tone multi-frequency transcoding server for use by multiple session border controllers
First Claim
Patent Images
1. A method of operating a communication system comprising:
- in each of a plurality of session border controllers, receiving communication packets transferred over communication sessions between one or more source communication systems and one or more destination communication systems, processing the communication packets to detect Dual Tone Multi-Frequency (DTMF) signaling, and if the DTMF signaling is detected, then processing DTMF information to determine if DTMF transcoding is required by the one or more destination communication systems, and if the DTMF transcoding is required, then transferring DTMF transcoding instructions from the session border controllers for delivery to a DTMF transcoding server, the transcoding instructions comprising destination addresses of the one or more destination communication systems;
in the DTMF transcoding server, receiving and processing the DTMF transcoding instructions, and in response, transferring transcoded DTMF signaling in Session Initiation Protocol (SIP) information messages from the DTMF transcoding server for delivery to the one or more destination communication systems based on the destination addresses of the one or more destination communication systems included in the transcoding instructions, the SIP information messages comprising source addresses indicating the session border controllers.
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Abstract
In a packet communication system, session border controllers receive and process communication packets to detect DTMF signaling. If DTMF signaling is detected, the session border controllers determine if DTMF transcoding is required. If DTMF transcoding is required, the session border controllers transfer DTMF transcoding instructions to a DTMF transcoding server. In response to the transcoding instructions, the DTMF transcoding server transfers transcoded DTMF signaling.
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Citations
20 Claims
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1. A method of operating a communication system comprising:
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in each of a plurality of session border controllers, receiving communication packets transferred over communication sessions between one or more source communication systems and one or more destination communication systems, processing the communication packets to detect Dual Tone Multi-Frequency (DTMF) signaling, and if the DTMF signaling is detected, then processing DTMF information to determine if DTMF transcoding is required by the one or more destination communication systems, and if the DTMF transcoding is required, then transferring DTMF transcoding instructions from the session border controllers for delivery to a DTMF transcoding server, the transcoding instructions comprising destination addresses of the one or more destination communication systems; in the DTMF transcoding server, receiving and processing the DTMF transcoding instructions, and in response, transferring transcoded DTMF signaling in Session Initiation Protocol (SIP) information messages from the DTMF transcoding server for delivery to the one or more destination communication systems based on the destination addresses of the one or more destination communication systems included in the transcoding instructions, the SIP information messages comprising source addresses indicating the session border controllers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A communication system comprising:
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a DTMF transcoding server; a plurality of session border controllers each configured to receive communication packets transferred over communication sessions between one or more source communication systems and one or more destination communication systems, process the communication packets to detect Dual Tone Multi-Frequency (DTMF) signaling, and if the DTMF signaling is detected, then processing DTMF information to determine if DTMF transcoding is required for the one or more destination communication systems, and if the DTMF transcoding is required, then transferring DTMF transcoding instructions for delivery to the DTMF transcoding server, the transcoding instructions comprising destination addresses of the one or more destination communication systems; in the DTMF transcoding server, receiving and processing the DTMF transcoding instructions, and in response, transferring transcoded DTMF signaling in Session Initiation Protocol (SIP) information messages from the DTMF transcoding server for delivery to the one or more destination communication systems based on the destination addresses of the one or more destination communication systems included in the transcoding instructions, the SIP information messages comprising source addresses indicating the session border controllers. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification