CALL CONTROL SYSTEM AND MESSAGE TRANSMITTING METHOD

摘要

PROBLEM TO BE SOLVED: To display input message information of a caller to a terminal on the call termination side before response and to exactly understand whether or not a message is displayed in the terminal at the call termination side at a calling side in PoC communication. SOLUTION: In this call control system, a calling mobile machine displays the message information added to an INVITE signal in call on a call termination screen of a call termination mobile machine in call connection of the PoC communication. A call termination side SIP server 4-2 receives the INVITE signal to which the message information considering the call termination mobile machine as a call termination destination is added and the call termination side SIP server 4-2 terminates the INVITE signal to the call termination mobile machine upon judging corresponding functions of the call termination mobile machine. The calling mobile machine is notified of a transmission result signal indicating whether or not the message information is displayed on the call termination screen of the call termination mobile machine from the call termination mobile machine or the call termination side SIP server 4-2 via a call side SIP server 4-1. COPYRIGHT: (C)2008,JPO&INPIT