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Scalable voice over IP system configured for dynamically switching codecs during a call

DC
  • US 6,977,911 B1
  • Filed: 07/31/2000
  • Issued: 12/20/2005
  • Est. Priority Date: 07/31/2000
  • Status: Expired due to Term
First Claim
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1. A method in a media server, the method comprising:

  • establishing a call having a first media channel with an IP telephony gateway, the first media channel configured for transmitting a first media stream according to a corresponding first compression;

    initiating closing of the first media channel based on a request for a resource utilizing a second compression; and

    starting for the call a second media channel, configured for transmitting a second media stream according to the second compression, upon closing the first media channel,wherein the establishing step includes;

    receiving a setup message from the IP telephony gateway on a call control channel;

    exchanging compression capabilities information with the IP telephony gateway;

    sending to the IP telephony gateway, on a media control channel, an open channel message requesting establishment of the first media channel according to the first compression based on the compression capabilities information; and

    initiating transmission of the first media stream on the first media channel in response to an acknowledgment to the open channel message.

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