System and method for servicing ring back tone

The present invention relates to a ring back tone service system and method. If the ring back tone service method of the present invention to the destination local exchange in response to call request from the caller the system determines whether the ring back tone service subscription called party's system, and wherein the called party's system is joined to a ring back tone service the call to the intelligent network trigger, and checks whether the call trigger from said called local exchange intelligent network service number by sending back intelligent network service call to which the called party ring back tone system group specified by the sender system and calls the called party system that is connected to a private branch exchange. In this way, a variety of the called party ring back tone system desired can be delivered to the sender system via the intelligent network. In addition, corporate subscribers can be transmitted to the caller ringback tone for corporate communications through an RBT service according to the present invention. RBT, intelligent network, a wired communication network, a private branch exchange, receiving a subscriber-only