Method of managing trunk and querying and ascertaining ring-back sound to provide ring-back sound in subscriber-based ring-back sound service

A method of querying a ring-back sound in a subscriber-based ring-back sound service, in which routing from at least one intelligent peripheral to at least one intelligent peripheral server is performed to query a ring-back sound in a subscriber-based ring-back sound service process, the intelligent peripheral being constructed in such a way that a plurality of intelligent peripherals are installed according to mobile switching centers or mobile switching center groups to allow one or more adjacent mobile switching centers to be directly trunk-connected to one of the intelligent peripherals according to singular routing information, and the intelligent peripheral server being constructed in such a way that ring-back sound codes corresponding to ring-back sounds stored in the intelligent peripherals are stored in the intelligent peripheral server to be preset and registered according to subscribers, and a plurality of intelligent peripheral servers are installed according to phone numbers of subscriber terminals, prefix numbers thereof, prefix number groups thereof, or main working areas of the subscribers to correspond to information of the subscribers, the method comprising the steps of

• a) when a request for a trunk call connection that allows a ring-back sound preset and registered with respect to a terminating terminal to be transmitted to an originating terminal instead of a typical ring-back tone according to routing information to a corresponding intelligent peripheral provided from the home location register, is received from a corresponding mobile switching center, the corresponding intelligent peripheral searching for routing information to one among the plurality of intelligent peripheral servers depending on information of the terminating subscriber provided from the trunk-connected corresponding mobile switching center;
• and
• b) the corresponding intelligent peripheral performing routing to the corresponding intelligent peripheral server depending on the searched routing information and querying and obtaining a code of a corresponding ring-back sound depending on the information of the terminating subscriber.

A method of ascertaining a ring-back sound in a subscriber-based ring-back sound service, which allows a subscriber to ascertain his or her own ring-back sound or another subscriber's ring-back sound substituting for a typical ring-back tone using an automatic response service unit having a variety of ring-back sounds as specific sounds to correspond to code information when the subscribed-based ring-back sound service for providing a terminating subscriber's desired specific sound instead of the ring back tone is implemented, the automatic response service unit performing the steps of:

• a) obtaining information of an arbitrary second subscriber using a ring-back sound to be ascertained while communicating with a mobile terminal of a first subscriber connected to the automatic response service unit through a mobile communication network depending on a preset scenario;
• b) requesting and obtaining code information corresponding to the second subscriber information from an intelligent peripheral server while communicating with the intelligent peripheral server having the code information to correspond to the subscriber information;
• and
• c) transmitting a ring-back sound provided to correspond to the obtained code information to the mobile terminal of the first subscriber.