Patent ID: 8824657
Filing Date: 2014-09-02
Classification: H04M

Abstract:
1. A method for providing ring back tones in a communication network which at least includes an originating switching device, a terminating switching device and a Home Location Register (HLR), said method comprising: a. establishing a ring back tone device for storing and playing ring back tones in the communication network, and storing ring back tone service register information of subscribers in the subscriber information in the HLR, wherein said ring back tone service register information at least includes identification information indicating whether a subscriber is a ring back tone service registered subscriber and routing information of the ring back tone device; b. after receiving a call request, the originating switching device sending a request for roaming number of the called subscriber to the HLR, and then judging whether the called subscriber is a ring back tone service registered subscriber according to the called subscriber information corresponding to said identification information received from the HLR, if so, going to step c, else, going to step d; and c. establishing a connection between the originating switching device and the terminating switching device, and establishing a connection between a switching device and the ring back tone device according to the routing information of the ring back tone device in the subscriber information of the called subscriber, the ring back tone device playing a ring back tone pre-customized by the called subscriber to the calling subscriber when the called terminal is idle; or d. establishing a connection between the originating switching device and the terminating switching device.