×

Dual tone multi-frequency transcoding server for use by multiple session border controllers

  • US 9,813,562 B1
  • Filed: 09/01/2010
  • Issued: 11/07/2017
  • Est. Priority Date: 09/01/2010
  • Status: Expired due to Fees
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.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×