Dial pulse detector and detecting method for paging service for

Details Dial pulse detector and detecting method for paging service for Dial pulse detector and detecting method for paging service for

1996-11-12

1998-10-13

Matar, Ahmad F.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379286, 379342, H04M 300

Patent

active

058224246

ABSTRACT:
A dial pulse detector in a paging system for rendering a paging service for a subscriber who uses a mechanical telephone includes a delay correlativity calculator for receiving dial pulses generated by predetermined pre-test dialing digits dialed by the subscriber, calculating the correlativity between the delayed dial pulse and undelayed dial pulse to sample a reference signal of the dial pulse. An energy correlativity calculator calculates the energy correlativity between the sampled reference signal and the successively received dial pulse to examine the validity of the reference signal. A dial pulse verifier operates according to recognition of the validity of the reference signal by the energy correlativity calculator and checks input number of times and input time of the dial pulse so as to verify whether the dial pulse corresponds to the pre-test dialing digits.

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