| 摘要 |
A communication system includes a call management server; communication terminals; and a positional information server. The positional information server stores therein positional information and information leakage risk information of each communication terminal, updates the positional information and the information leakage risk information in accordance with a position of the communication terminal, and transmits the updated information together with corresponding communication terminal information to the call management server. The call management server updates the positional information and the information leakage risk information of a communication terminal when receiving the information from the positional information server, and transmits a list containing at least a terminal name, latest positional information, and latest information leakage risk information of each communication terminal capable of joining the communication to a communication terminal. The communication terminal displays the list in a different manner of the positional information in accordance with the information leakage risk information. |
