| 摘要 |
PURPOSE:To make it possible to read a selective signal by the same control in either case of a multifrequency signal or a dial pulse, by converting the dial pulse counting circuit and its output in the same way as the output part of the multifrequency receiver, in the multifrequency signal receiving trunk. CONSTITUTION:A dial pulse from a transmitting station is received by a current supply loop supervisory circuit 10 in the receiving trunk 6, and it is transmitted to the counting conversion circuit 13 through a network 4 from the dial pulse repeating circuit 11, and also the dial pulse receiving circuit 12 in the selective signal receiving trunk 7. Subsequently, when multifrequency signal has been received, the incoming signal is received by a multifrequency receiver 8 in the receiving trunk 7 through the trunk 6, and is transmitted to the output circuit 9. Thus, a selective signal can be read by the same control in either case of a multifrequency signal or a dial pulse, when it is watched from CPU3. |
