Dialer circuit

Details Dialer circuit Dialer circuit

1990-01-30

1991-07-09

Ng, Jin F.

Telephonic communications

Supervisory or control line signaling

Substation originated

379355, 379361, 379362, 379418, H04M 100

Patent

active

050312120

ABSTRACT:
A dialer circuit comprising a microcomputer for controlling the dialing of a telephone. This dialer circuit is capable of storing a telephone number and transmitting a signal concerning this telephone number to a telephone circuit according to a given command. The dialer circuit is equipped with a means for detecting the ON state or the OFF state of a hook switch; upon detection of the state of the hook switch, the dialer circuit performs a resetting of the entire system except a memory in which the telephone number is stored. The result is that when operating the hook switch, it is possible to automatically reset only the system, thus effectively preventing any reckless driving of the system.

REFERENCES:
patent: 4365116 (1982-12-01), Pira et al.
patent: 4887294 (1989-12-01), Ruey-Guang

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