Patent ID: 7400882

Claim:
A method of providing a predetermined sound as an RBT (RingBack Tone) in a communication network, said method comprising: an HLR (Home Location Register) furnishing a call-originating exchanger with information on whether or not an RBT is to be replaced for a called terminal through a response message to a location request message received from the call-originating exchanger that sends the location request message to the HLR when a call connection is requested by a caller to the called terminal; the call-originating exchanger searching for a sound code assigned to the called terminal based on the information included in the response message; and the call-originating exchanger providing the caller with a pre-stored RBT-replacing sound associated with the found sound code as an RBT while requesting a trunk connection to a call-terminating exchanger associated with the called terminal based on the response message.