Digital telephone control interface system

Details Digital telephone control interface system Digital telephone control interface system

1994-11-30

1996-02-27

Friedman, Carl D.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379200, H04M 100

Patent

active

054955289

ABSTRACT:
The present invention is a digital telephone control interface system that provides a programmable control to the keys of a digital feature telephone. The programmable control selectively masks the keys present on a telephone and prevents masked keys from being directly responded to by the telephone or routed to the telephone switching network. While the keys are masked, the programmable control can suppress, delay, modify or enhance the key events produced by the masked keys as directed by the application software being run by the programmable control.

REFERENCES:
patent: 4578540 (1986-03-01), Borg et al.
patent: 4720853 (1988-01-01), Szlam
patent: 4860339 (1989-08-01), D'Agosto, III et al.
patent: 4903289 (1990-02-01), Hashimoto
patent: 4953202 (1990-08-01), Newell
patent: 5109408 (1992-04-01), Greenspan et al.

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