Apparatus and method for automatically returning a telephone set

Details Apparatus and method for automatically returning a telephone set Apparatus and method for automatically returning a telephone set

1994-11-18

1997-02-25

Chin, Wellington

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Monitoring

379 32, 379130, 379131, 379177, 379184, 379190, 379161, 379162, H04M 322, H04M 1500, H04M 100, H04M 300

Patent

active

056065930

ABSTRACT:
An apparatus that after a time period settable by the user automatically returns an off-hook telephone to an on-hook condition. This apparatus thus electrically hangs up a telephone handset that is inadvertently left off-hook and allows normal handling of outgoing and incoming calls at other telephone extensions and in some embodiments, even allows calls to ring-in to the telephone having the inadvertently off-hook handset. The apparatus also senses when the inadvertently off-hook handset is returned on-hook and rapidly restores the automatic-return-to-an-on-hook condition switch to normal operation.

REFERENCES:
patent: 4273960 (1981-06-01), Fahey
patent: 4686697 (1987-08-01), Shapiro
patent: 4903291 (1990-02-01), Tsurufuji
patent: 4922529 (1990-05-01), Kiel
patent: 4998271 (1991-03-01), Tortola
patent: 5142572 (1992-08-01), Hopkins
patent: 5263081 (1993-11-01), Nightingale
patent: 5390249 (1995-02-01), Paek

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