| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a communication apparatus, a mobile communication terminal, a communication system, and a method of communication which reduce user's feeling of strangeness at the establishment of call connection between mobile communication terminals. <P>SOLUTION: An SIP server 3 includes a request receiving part 301, a session determination part 302, an incoming call notification transmitting part 303, a response information receiving part 304, and a direction information transmitting part 305. The request receiving part 301 receives a call connection request from a mobile communication terminal 2a. The session determination part 302 uses PDP context to determine whether or not the information can be transmitted/received. The incoming call notification transmitting part 303 transmits transmission direction information for directing the transmission of an incoming call notification through SMS. A response information receiving part 304 receives response information from a mobile communication terminal 2b in response to the transmission of the incoming call notification. The direction information transmitting part 305 transmits direction information for directing the replay of a beep sound to the mobile communication terminal 2a when the response information is received. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
