REFUSAL OF A SERVICE REQUEST CONTAINED BY A SID 'UPDATE' SIGNALING MESSAGE.

摘要

Communication client (A) having an interface (INT) for exchanging signaling messages (MS, MS) with other clients (B, C) through a data network (N) and a processing device (TRT) ) to manage multimedia sessions with these other communication clients and in particular able to process update signaling (MU) messages containing at least one request for services, by checking for each update message whether the modification of the associated multimedia session is possible and, if so, make the change. The processing unit is provided to, if it is impossible to modify the multimedia session for at least one service request, transmit a response message (containing an identifier of this service request.