Patent ID: 7447496

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 first information on whether an RBT is to be replaced or not and second information on a route to a sound database through a response 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 a called terminal; the call-originating exchanger requesting a first trunk connection to a call-terminating exchanger and a separate, second trunk connection to the sound database based on the response including the first and the second information, while furnishing the sound database with third information identifying the called terminal; and the sound database selecting an RBT-replacing sound based on the third information and providing the selected RBT-replacing sound to the caller through the second trunk connection and the call-originating exchanger.