| 摘要 |
PURPOSE: The apparatus for detecting a dial pulse signal in an optical signal transmission equipment is provided to detect a dial pulse signal and to supply it to an exchange, in an RT(Remote Terminal) optical equipment that executes data communications with the exchange in an IDLC(Integrated Digital Loop Carrier) method. CONSTITUTION: A channel part receiving a signal from a telephone through a relevant channel is comprised of an inverter(421), a first F/F(Flip Flop)(423), a second F/F(425), a control part(44) and a reset generator(427). The inverter(421) inverts a dial pulse signal supplied from the telephone and makes it into an NDET signal. The first F/F(423), receiving the first clock signal, reforms the NDET signal to output as a DEFT signal. The second F/F(425), receiving the output signal of the first F/F(423) as its clock terminal input signal, outputs it as a flag signal. The control part(44), recognizing the flag signal as a dialing signal, outputs a reset control signal(CS) and the second clock signal(DCLK). The reset generator(427) resets the flag signal output from the second F/F(425) by supplying a reset signal to the second F/F(425) by the reset control signal(CS) and the second clock signal(DCLK). |
