| 摘要 |
PURPOSE:To receive a dial pulse signal centralizingly by a dial pulse receiver provided at the post-stage of a network by switching the dial pulse signal at a time division exchange so as to be inputted to an analog/digital converting means. CONSTITUTION:A switch 12 is connected to a 2-wire/4-wire converting circuit 7 at talking and a voice signal is transmitted/received from/to the network 3 via a CODEC8. The switch 12 is connected to a curent detecting circuit 10 at dialing, and the dial pulse signal is given to a digital dial pulse reception circuit 14 via a resistor 9, the current detection circuit 10, and the CODEC8 and the network 3. An SD control section 13 changes over the switch 12 depending on the state of dialing and talking under the control of a central control section 15. |
