| 摘要 |
PURPOSE:To perform the calling subscriber number display service and the calling absence subscriber recording service as a telephone terminal, by receiving a no- ringing call signal and a data signal under the loop open state after service completion and displaying and storing data of a transmitted signal. CONSTITUTION:When the calling subscriber completes the call to break hook switch 2, the no-ringing call signal transmitted from the exchange is received through the line connection terminal by no-ringing call signal receiving circuit 10. Circuit 10 reports this receiving to function control circuit 8, and circuit 8 perfroms the function control. The FS signal from the exchange is received through terminal 1 by FS receiving circuit 7, and circuit 7 demodulates this FS signal and converts it to serial data and transmits it to circuit 8. Circuit 8 analyzes this data and displays it and stores it in memory 12 of circuit 8. As a result, the calling subscriber number display service and the calling absence subscriber number recording service are performed as a telephone terminal. |
