Patent ID: 7746845

Claim:
A method for transmitting call control parameters between two media gateway controllers, wherein the call control parameters enable a switchover between a voice transfer mode and a data transfer mode separate from a setup of a medium or bearer connection comprising: providing a first media gateway controller and a second media gateway controller, the first and second controllers included in an internet protocol (IP) network; providing a terminal device; converting the call control parameters into a session initiation protocol (SIP) or session initiation protocol for telephones (SIP-T) message, the call control parameters including a parameter for indicating a codec switchover of the bearer connection in the form of an action indicator in accordance with Q.765.5; transmitting a session message containing the converted call control parameters; converting the session message containing the converted call control parameters into a message based on a standard signaling protocol to be transmitted between the two media gateway controllers; and transmitting the message between the two media gateway controllers based on the standard protocol with the call control parameters.