| 摘要 |
PURPOSE:To resume a telephone call again even if the call is cut by shift by storing a telephone line between one mobile station and the other telephone part and informing the telephone part that the call is possible or not when the call cannot be made. CONSTITUTION:When the mobile station 13b goes out of a radio area M2, the telephone line with the mobile station 13a is cut. The cut signal is transmitted from the station 13b to a fixed station 12b and RAM of an exchange 11. The stations 13b and 13a are written and stored. The exchange 11 informs the station 13a that the station 13b exists beyond the radio area M2. When the station 13b shifts from a radio area M3 to a radio area M4, the radio wave of the area M4 becomes stronger with the shift of the station 13b. When the station 13b shifts to the area M4, the fixed station 12d recognizes the position of the station 13b and informs the exchange 11 of it. The exchange 11 judges stored information of RAM and transmits an incoming signal from the station 12d to the station 13b. When the station 13b generates a response signal as against the incoming signal, stored information of RAM is eliminated and the call is resumed. |
