FIELD: telephone communications engineering. SUBSTANCE: dialing pulse detector has delay correlation factor calculator for receiving dialing pulses generated by preset dialing check code dialed by particular user, calculating correlation factor between delayed dialing pulse and non- delayed one to select reference dialing pulse signal; energy correlation factor calculator for calculating energy correlation factor between chosen reference signal and serially received dialing pulse checking if this reference signal is correct and verifying dialing pulses that functions to identify correct reference signal by energy correlation factor calculator and to check input number of time intervals and input time of dialing pulses so as to check if this pulse corresponds to preset dialing code. EFFECT: provision for rendering adequate pager servicing to mechanical telephone user. 10 cl, 6 dwg
