Dial pulse signaling arrangement

Details Dial pulse signaling arrangement Dial pulse signaling arrangement

1978-11-08

1980-07-29

Brown, Thomas W.

179 2A, 179 16EC, 179 18FG, H04M 342

Patent

active

042152461

ABSTRACT:
A telecommunication system including a rotary dial subscriber set for transmitting sequences of dial pulses to a telephone central office over at least two conductors is disclosed. In response to a first set of dialed digits, the central office establishes a DC conductive path between the subscriber set and a DC blocking trunk circuit. A central office scan arrangement is connected to the communication path to determine the conduction state between the conductors of the communication path in order to maintain or remove the communication path. The system also includes a dial pulse detector which detects and counts dial pulses in each sequence of dial pulses transmitted from the subscriber set. In response to the first dial pulse of each sequence, the dial pulse detector generates signals which are utilized to inhibit the central office scanner from detecting further dial pulses. After each dial pulse sequence and before a subsequent one can occur, a tone generator transmits an AC coded signal on the communication path representing the number of dial pulses counted by the dial pulse detecting arrangement.

REFERENCES:
patent: 4064372 (1977-12-01), Altenburger

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