Method for determining telephone dial pulse parameters independe

Details Method for determining telephone dial pulse parameters independe Method for determining telephone dial pulse parameters independe

1986-08-25

1989-06-13

Ng, Jin F.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379286, 379342, H04Q 136

Patent

active

048399205

ABSTRACT:
A method is disclosed for measuring telephone dial pulse parameters independent of telephone subscriber line length. To avoid distortions resulting from varying subscriber line lengths, there is performed during the first pulse interval of a dial pulse series to be measured, a voltage measurement with results in a value that depends on the line length, and, in accordance with this value, the times measured for pulse interval and pulse duration of the dial pulse series are corrected.

REFERENCES:
patent: 3456083 (1969-07-01), Van der Veen
patent: 3879583 (1975-04-01), Rooks
patent: 3935392 (1976-01-01), Smith et al.
patent: 4071781 (1978-01-01), Kayalioglu
patent: 4300024 (1981-11-01), Wever et al.
"Dial Pulse Detector", C. R. Bringol et al., IBM Technical Disclosure, vol. 18, No. 4, Sept. 1975, pp. 991-992.
Translation Japanese Pat. No. 56 [1981]--122579.

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