Patent ID: 6977911

Claim:
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.