Method and apparatus for generating substitute of ringback tones in communication network

PURPOSE: A method and apparatus for generating substitution sound of ringback tone are provided to transmit various sounds as a ringback tone to be selected by a member in a communication network. CONSTITUTION: The method comprises steps of setting, performing, receiving, transmitting and releasing. In the setting step, a termination trigger field is set as a ringback tone or a substitution sound in a member's profile. In the performing step, a reception-mobile switching center performs an interpreting information operation which requires generating a substitution sound by a service control point(SCP). In the receiving step, the service control point(SCP) performs a seize resource operation by IP, and receives a temporary local directory number. In the transmitting step, the service control point(SCP) transmits the temporary local directory number to the reception-mobile switching center. In the releasing step, when the IP receives a disconnecting resource the IP releases a communication line.