| 摘要 |
PURPOSE:To prevent the disturbance given to the handset of the called side by transmitting the transfer signals to the handset of the called side after the transfer signals of the handset of the calling side disappear in case the transfer action is given to other handsets from one handset. CONSTITUTION:The handset (not shown in the figure) connected by radio is hung up the busy output of signal detection circuit 11 actuates hang-up switch 2. Thus transmitter 3 starts the transmission. At the same time, the output of busy signal generation circuit 13 is transmitted in the form of the busy signals to other handset. With the transfer action given to other handsets by the hung-up handset, circuit 11 starts call signal selection circuit 14. When receiver 4 detects the discontinuation of the transfer signals, switch 12 drives call signal generation circuit 15. Thus the call signals are transmitted to the handset of the transfer destination. |
