Rotary dial pulse receiver

Details Rotary dial pulse receiver Rotary dial pulse receiver

1988-06-06

1990-07-24

Ng, Jin F.

Telephonic communications

Supervisory or control line signaling

Signal receiver

379377, 379286, H04M 164

Patent

active

049440012

ABSTRACT:
Apparatus and method for receiving and decoding the bursts of line current activity produced by rotary dial action in dialing a sequence of digits. In accordance with the apparatus of the present invention, a rotary dial pulse receiver counts the number of bursts of line current activity produced by a given telephone handset in dialing a standard test digit. A conversion means selects a conversion algorithm which is effective to express the relationship between the number of bursts counted and the value of the digit dialed and applies the selected algorithm to decode the value of subsequent non-standard digits dialed. In accordance with the method of the present invention, a method of converting the number of bursts in line current activity produced through rotary dial action in dialing a sequence of digits by selecting and applying a conversion algorithm is described.

REFERENCES:
patent: 3927264 (1975-12-01), Fish et al.
"Dial Pulse Detector", C. R. Bringol et al., vol. 18, No. 4, Sep. 1975, pp. 991-992.
Signetics Corporation, Four-Bit Universal Shift Register 10141, 12/1972, pp. 5-74.

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