COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD

摘要

Provided is a communication system which provides a multimedia service which can request a communication network to release registration of a transmission terminal which has been registered as an unauthorized terminal in the network.  Typically, when the transmission terminal is connected to a transmission side network and registered as an unauthorized terminal in the arrival side communication network, the transmission side network requests the arrival side communication network to release the registration.  It is also possible to report to the transmission terminal, that the arrival of the communication in the communication system is limited.