Patent ID: 7957523

Claim:
A method of implementing a ring back tone based on a group mobile switchboard service, the method comprising: obtaining, by a home service control point of the group mobile switchboard, an identification of a called extension subscriber which a calling party calls: sending routing information of a ring back tone intelligent peripheral and the identification of the called extension subscriber to a gateway mobile switching center or mobile switching center which triggers the intelligent service; routing the identification of the called extension subscriber to the ring back tone intelligent peripheral according to the routing information of the ring back tone intelligent peripheral, by the gateway mobile switching center or mobile switching center which triggers the intelligent service: connecting the call to a visited mobile switching center of the called extension subscriber, by the ring back tone intelligent peripheral; playing a group ring back tone subscribed to by the group customer for the calling party; and wherein the process of obtaining an identification of a called extension subscriber comprises the following steps: dialing, by a calling party, a group mobile switchboard number which has been applied for a group ring back tone; performing interaction between an intelligent peripheral of the group mobile switchboard and the calling party via a gateway mobile switching center or mobile switching center which triggers the intelligent service, obtaining the identification of the extension subscriber which the calling party calls; encapsulating the identification of the extension subscriber into a script event message to report to the home service control point of the group mobile switchboard, by the intelligent peripheral of the group mobile switchboard.