Patent ID: 7623507

Claim:
A method of interworking between dissimilar multimedia terminals through a Video Interactive Gateway (VIG) unit in a video communication system, the video communication system comprising at least one Video Interactive Gateway unit, at least one low bit-rate multimedia terminal, and at least one packet based multimedia terminal, the method comprising the steps of the low bit-rate multimedia terminal sending a first Open Logical Channel (OLC) message to the Video Interactive Gateway unit, the first OLC message including a forward channel description and a Reverse channel description, and the Video Interactive Gateway unit sending and receiving messages to set up video communication between the multimedia terminals, wherein the step of setting up video communication between the multimedia terminals, includes: the Video Interactive Gateway receiving a second OLC message from the packet based multimedia terminal, and the Video Interactive Gateway initiating a modified OLC message by using the forward channel description received from the packet based multimedia terminal as forward channel description towards the low bit-rate multimedia terminal, and by using the forward channel description received from the low bit-rate multimedia terminal as the reverse channel description towards the low bit-rate multimedia terminal.