| 摘要 |
PURPOSE:To make it possible to confirm whether a call is performed correctly or not, by returning the number, which the calling subscriber transmitted, from the incoming side to the calling subscriber. CONSTITUTION:The number of mobile station 15 is put on signal F1 from mobile station and is transmitted to base exchange 18. Signal F1 is converted to signal F4 and is transmitted to mobile station 19 from base exchange 18. In mobile station 19, the transmitted number is stored in a memory circuit and is displayed on display equipment 21, and simultaneously, this number is put on signal F3 and is returned to mobile station 15 through base exchange 18. Mobile station 15 collates the returned number with its own number and can confirm whether the number is transmitted correctly or not. |
