| 摘要 |
PURPOSE:To enable a called terminal to obtain the position information of a mobile telephone terminal by providing a control part and a display part in the called terminal speaking with the mobile telephone terminal and transmitting position information with a DTMF signal and changing position information of the mobile telephone terminal by a mobile telephone exchange side. CONSTITUTION:A mobile telephone exchange 3 is provided with a positon information control part 6, and a control part 7 and a display part 8 of a liquid crystal display device, etc., are provided in a called terminal 5 speaking with a mobile telephone terminal 1. The region name of a local radio station 2i which receives the call signal from the mobile telephone terminal 1 is displayed on the display part 8 of the called terminal 5, and the mobile telephone exchange 3 checks responses from local radio stations around the local radio station 2i in accordance with the movement of the mobile telephone terminal 1. When the mobile telephone exchange 3 selects a local radio station 2n as the communication station of the highest response sensitivity, position information is communicated with the DTMF signal, and new position information of the speaking mobile telephone terminal 1 is displayed on the display part 8 provided in the called terminal. |
