Computer operated system for dialing telephone numbers

Details Computer operated system for dialing telephone numbers Computer operated system for dialing telephone numbers

1987-12-21

1989-09-19

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Substation originated

379216, H04M 127

Patent

active

048688487

ABSTRACT:
A computer operated telephone dialing system has a program that selects a telephone number from a directory of names and corresponding telephone numbers. The program sends an off-hook instruction and a select flag to the computer's printer port, followed by a hexidecimal code sequence representing digits of the telephone number. A dialing circuit coupled to said printer port is activated by the select flag and, in response to the hexidecimal code sequence, provides DTMF dialing signals to telephone lines. The program then sends an on-hook signal, allowing a telephone handset to be used.

REFERENCES:
patent: 4731826 (1988-03-01), Daie
Peter H. Lewis, The New York Times, "Phone Book for the PC", 4/12/88, Section C, p. 2.

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