A radio communication system operates between two radio terminals, and/or between a radio terminal and a fixed terminal through a network. In the present disclosure, the switching of codec-release mode and codec mode in the network is controlled by using a specific control line which is installed in...http://www.google.fr/patents/US5513211?utm_source=gb-gplus-shareBrevet US5513211 - Radio communication system with controlled voice code switching
Radio communication system with controlled voice code switching
