| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication network system for permitting a caller to grasp time when a receiver becomes a communication possible state. SOLUTION: A connection confirmation request signal for confirming whether the communication terminal equipment of the receiver permits communication connection with the communication terminal equipment of the caller or not is transmitted to a server from the communication terminal equipment of the caller. The server transmits a connection notice signal to the communication terminal equipment of the caller. Thus, the communication terminal equipment of the caller is caused to confirm whether the communication terminal equipment of the receiver permits communication with the communication terminal equipment of the caller or not. |
