| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a system which allows for confirmation of the code of other party terminal, simultaneously with establishment of voice call, by simply installing an application like a software.SOLUTION: Voice call is established between a terminal 2 and a service server 3, and the terminal 2 transmits a tone signal sequence based on the code to the service server 3. The service server 3 stores the code in association with the telephone number of the terminal 2. Subsequently, voice call is established between a terminal 1 and the terminal 2. Thereafter, voice call is established between the terminal 1 and the service server 3, the terminal 1 transmits a tone signal sequence based on the telephone number of the terminal 2, and the service server 3 searches a code corresponding to the telephone number, and replies a tone signal sequence based on the code to the terminal 1. The terminal 1 detects the code from the tone signal sequence. |
