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System and method for adjusting code speed in a transmission path during call set-up due to reduced transmission performance

  • US 8,488,447 B2
  • Filed: 05/31/2007
  • Issued: 07/16/2013
  • Est. Priority Date: 06/30/2006
  • Status: Active Grant
First Claim
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1. A method for establishing a telephone call over a packet network, said method comprising:

  • receiving a call request to initiate the telephone call from an originating call device to a terminating call device at a call control manager located on the packet network, wherein the originating call device and the terminating call device are not in current communication;

    determining, by the call control manager, whether the originating call device is authorized to communicate with the terminating call device;

    responsive to a determination that the originating call device is not authorized to communicate with the terminating call device, transmitting a reject message to the originating call device indicating that the call request is rejected;

    responsive to a determination that the originating call device is authorized to communicate with the terminating call device, retrieving, by the call control manager, transmission path status information of a transmission path between the originating and terminating call devices;

    determining, by the call control manager, status of the transmission path on the packet network between the originating and terminating call devices; and

    responsive to a determination that the status of the transmission path is determined to be within a first range, establishing, by the call control manager, the telephone call between the originating and terminating call devices over the transmission path using a first CODEC having a first data rate;

    responsive to a determination that the transmission path is determined to be within a second range, determining if there is an alternate transmission path on the packet network between the originating and terminating call devices;

    in which the status of the alternate path is within the first range;

    responsive to a determination that there is an alternate transmission path on the packet network between the originating and terminating call devices having a status within the first range, establishing the telephone call between the originating and terminating call devices over the alternate transmission path using the first CODEC having the first data rate; and

    responsive to a determination that there is no alternate transmission path on the packet network between the originating and terminating call devices having a status within the first range, establishing the telephone call between the originating and terminating call devices over the transmission path using a second CODEC having a second, lower data rate.

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