| 摘要 |
<p>PURPOSE:To reduce the automatic call time especially to a near station by providing a means detecting immediately the busy state of an opposite station independently of the distance between a transmission and a reception station. CONSTITUTION:A control section 21 detecting a pulse signal P from a detection circuit 15 generates a control signal K so as to change over a switch section 12 to the position of contact S, a start signal L is generated so as to start a timer 22. When a set time H is elapsed, the timer 22 transmits an output signal M to a transmission section 9. Thus, a signal generating section 11 transmits again (recalling of addressed station) of a dial signal D corresponding to a number data C in a register 10. Thus, when the addressed station is busy, the 1st call mode is cut off immediately and the mode is transferred to the recalling mode by allowing a sender station to detect the busy signal informing the busy state in this way.</p> |
