Method and system for terminal codec setup of multimedia ring back tone service

The present invention relates to a method and system for terminal codec setup for the multimedia RBT service. The present invention, a home location register in the profile information including whether the subscriber's Ring Back Tone service subscription is stored (HLR: Home Location Register), by using the sound source-providing server for storing the RBT sound source, the calling party a called subscriber If to the call in the terminal codec setup how the RBT sound sources the called subscriber's pre-set in the sound source-providing server for the multimedia RBT service to be played to the calling terminal, (a) ISUP (ISDN, including the multimedia codec information When sending a User Part) call connection request message toward the called subscriber, comprising: receiving a first codec setup message including the multimedia codec information from the called subscriber side; (B) upon receipt of the first codec setup message, and transmits the second codec setup message for requesting to set the multimedia codec to the originating base station, to set the multimedia codec from the originating vocoder located in the caller-side Base Station Controller controlling; (C) the step of controlling when receiving the first codec setup message, and transmits a third codec setup message for requesting to set the multimedia codec to the originating terminal, said originating terminal to set the multimedia codec; And (d) a terminal codec setup method and system for multimedia ringback tone service, characterized in that for receiving the RBT sound sources selected using the multimedia codec information from the sound source-providing server comprises the step of transmitting to the originating terminal It relates. RBT, switches, terminals, multimedia codecs, routing, terminal codec setup