RING-BACK TONE SYSTEM AND A METHOD THEREOF, PARTICULARLY FOR ALLOWING A CALLEE TO DESIGNATE A DESIRED RING-BACK TONE AND ALLOW A CALLER TO HEAR IT WHEN THE CALLER MAKES A CALL

摘要

PURPOSE: A ring-back tone system and method thereof are provided to allow a callee to send various desired ring-back tones to a caller through an intelligent network and reduce costs by omitting the construction of an additional equipment or system. CONSTITUTION: A caller makes a call to a callee(S200). A terminating local exchange checks whether the callee has subscribed for a ring-back tone service(S210). If the callee has subscribed for the ring-back tone service, the terminating local exchange calls the callee and at the same time triggers the call for the callee to an intelligent network(S220). The intelligent network searches a database and transmits a ring-back tone of the callee to a caller system(S230). When the callee responds, the local termination MSC connects a callee system and the caller system and stops transmission of the ring-back tone to the caller system(S260).