RING BACK TONE SERVICE SYSTEM USING AN SSP IN A LOCAL CALL AND A METHOD THEREOF, ESPECIALLY RELATED TO SUPPLYING A SPECIFIC SOUND SOURCE AS A SOUND FOR REPLACING A BASIC RING BACK TONE IN A LOCAL CALL STATE

摘要

PURPOSE: An RBT(Ring Back Tone) service system using an SSP in a local call and a method thereof are provided to supply a specific sound source set by a receiver by using an SSP in local call state as a sound for replacing a basic RBT, so that operational profiles between an exchange and an HLR do not have to be changed. CONSTITUTION: An HLR(160) registers/manages routing information(S100), and a receiver terminal confirms a position-registered exchange(S102). The HLR(160) confirms whether a receiver is registered in an RBT service(S103). If so, the HLR(160) receives a TLDN(Temporary Local Directory Number)(S104,S105), and transmits a message including a receiving MDN(Mobile Directory Number) and the TLDN to an originating side(141)(S106). The originating side(141) transmits an IAM(Initial Address Message)(S107). An RBT service exchange(110) transmits an IAM for requesting a call connection to a receiving side(142)(S108). The exchange(110) monitors whether a basic RBT is delivered(S110). If so(S111), the exchange(110) transmits an IAM for requesting a sound source delivery(S112). A sound source supplier(120) supplies a specific sound source(S113). The specific sound source is transmitted to the originating side(141)(S115). The exchange(110) requests a call disconnection(S117), and supports a voice call by connecting the originating side(141) with the receiving side(142)(S118,S119).