Patent ID: 9614714
Date: 2017-04-04
CPC Classifications: H04L

Claim:
1. A method for setting up a video or multimedia call, which, after being set up, runs by way of a circuit-switched telecommunications network and by way of another telecommunications network which utilizes session initiation protocol for signaling, said method comprising: sending, by a media gateway control device to a media gateway device, a message instructing the media gateway device to conduct inband negotiations with the circuit-switched telecommunications network, the message including video codecs usable for video or multimedia telephony, the media gateway control device sending only codecs to the media gateway device that are supported at the media gateway device, the media gateway control device being provided for interworking between the circuit-switched telecommunications network and the other telecommunications network concerning signaling and the media gateway device being provided for interworking between the circuit-switched telecommunications network and the other telecommunications network concerning bearer, the media gateway device being included in the other telecommunications network; and setting up the video or multimedia telecommunications call by conducting, by the media gateway device, the in band negotiations based on the instructions from the media gateway control device, wherein the circuit-switched telecommunications network includes a 3rd Generation Partnership Project circuit-switched domain or a public switched telephone network, and wherein the other telecommunications network includes an Internet protocol multimedia sub system telecommunications network.