SYSTEM AND METHOD FOR SIP-BASED NON-ORIGINATING CALLBACK COMMUNICATION CONNECTION

摘要

PURPOSE: A callback call connection system and a method thereof based on SIP are provided to install an SIP client by using mobile terminal location information and to supply a callback bridge type to a third communication device. CONSTITUTION: If call request subscriber identification information about callback target and a telephone number on the other end are received from an SIP(Session Initiation Protocol) client(101), a callback unit(110) originates a call for transmitting the callback target. An exchanging unit(120) transfers a call received from the callback unit to a receiving side(160). A call is connected between the callback targets.