PURPOSE:To make an accurate hooking operation possible, by setting properly the difference between the loop switch-off time of a wire terminal equipment and the hook switch-on time of a telephone set, which is generated by the difference between the disconnecting operation time and the connecting operation time, to approximate zero. CONSTITUTION:By hook-off of a hook switch 16, a transmitter 11 and a control signal oscillator 7 are operated by a logical controlling circuit 15, and modulated radio waves of a control signal f1 are transmitted from an antenna 13. In the wire terminal equipment side, these radio waves are received, and a detection signal f1' from a control signal detector 29 is led to a logical controlling circuit 30. The circuit 30, a transmitter 22, and a control signal oscillator 28 are operated by this signal, and modulated radio waves of a control signal f2 are transmitted from an antenna 20. Thereafter, dial information is sent to the wire terminal equipment through a controlling circuit 6 and an oscillator 7 by the operation of a dial 5. This control signal is detected by a detector 29, and a loop switch 33 is controlled through the circuit 30 to send dial information to a wire transmission line 31. Thus, the service is permitted after switching connection and response the called subscriber.
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