| 摘要 |
PURPOSE:To interrupt a radio link to a slave set by connection device control from a master set side. CONSTITUTION:A master set 1 to which a connector 2 for a cordless telephone set and a slave set 3 are connected one to one by a radio line, in a way that a speech path switch 4 is driven under the control of a CPU 6 to select a line is provided with a line interruption detection circuit 11 in parallel to a trunk line circuit 9, and when a line caught by a cordless telephone set is a trunk line, the line interruption detection circuit 11 detects hook-off of the other party and informs it to the CPU 6, and in the case of an extension speech circuit, the CPU itself detects the interruption of the other party, and when the interruption of the other party is detected, the CPU 6 starts an internal counter and when a change in the state of a slave set 3 of the pertinent cordless telephone set is not recognized for a prescribed period of time, after radio link interruption data are set to a buffer memory 13 and a telephone set control circuit 5 sends set data to a pertinent connector 2 via a data line and the received connector 2 interrupts the radio link with the pertinent slave set 3. |
