Telephone dialing device and the operating method thereof

Details Telephone dialing device and the operating method thereof Telephone dialing device and the operating method thereof

1992-08-17

1994-11-08

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379354, 379356, 379359, 379352, H04M 100

Patent

active

053634373

ABSTRACT:
A telephone dialing device includes a data memory unit with a first memory region for storing normal dial numbers and a second memory region containing pre-stored memory dial numbers. A keypad is operated so as to provide a sequence of key inputs. The key inputs are decoded sequentially to determine if a normal or memory dialing activity is to be accomplished. A normal dial number corresponding to the decoded input is stored in the first memory region of the data memory unit, and a first code, which includes a normal dialing command and a first address to indicate the location of the normal dial number corresponding to the decoded input in the first memory region, is generated if the decoded input involves a normal dialing activity. A second code, which includes a memory dialing command and a second address to indicate the location of the memory dial number corresponding to the decoded input in the second memory region, is generated if the decoded input involves a memory dialing activity. The first and second codes are stored in a program memory unit in a sequence similar to that of the key inputs from the keypad, and are retrieved sequentially therefrom, thereby permitting retrieval of the corresponding dial number and execution of the dialing activity corresponding to the retrieved first and second codes.

REFERENCES:
patent: 4860349 (1989-08-01), Brown
patent: 4873720 (1989-10-01), Son
patent: 4882750 (1989-11-01), Henderson et al.
patent: 5151933 (1992-09-01), Abe
patent: 5216709 (1993-06-01), Wen et al.
patent: 5239576 (1993-08-01), Yoshida et al.

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