| 摘要 |
PROBLEM TO BE SOLVED: To keep a call connection continuing safely in a call connection device.SOLUTION: When a call connection device 1 receives a call connection request signal from a terminal 2A, it generates and retains encryption data by using a calling party number and a called party number included in the call connection request signal and sends a call connection request signal which has had the encryption data set therein to a terminal 2B. When a continue signal including the encryption data is received from the terminals 2A and 2B, the encryption data included in the continue signal and the encryption data retained in the call connection device 1 are compared to determine whether to break or continue the call connection. In this way, highly reliable and safe call connection can be achieved. |
