| 摘要 |
PURPOSE:To attain low power consumption of a radio telephone set by sounding a call tone at a master set when a reception electric field strength as to a ratio telephone set is a preset reference level or over and then the radio telephone set is located in the vicinity of the master set. CONSTITUTION:When connection control is applied by a control circuit 13 and the reception electric field strength as to the radio telephone set 2 is 100dBmuV or over, the control circuit 13 inputs a signal of high level from a 2nd comparator 37. Then the control circuit inputs the signal and judges it that the electric field state is excellent and the ratio telephone set 2 is located in the vicinity of the master set 1. That is, when the radio telephone set 2 is located in the vicinity of the master set 1, the reception electric field strength reaches 100dBmuV or over. The control circuit 13 applies the said judgement, continues the connection control, finishes it and sound a call signal by energizing the speaker 33 without sending said ringer signal to th radio telephone set 2. |
