Apparatus for use with key telephone systems

Details Apparatus for use with key telephone systems Apparatus for use with key telephone systems

1986-02-14

1986-12-30

Rubinson, Gene Z.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Monitoring

379164, H04Q 518

Patent

active

046330437

ABSTRACT:
Apparatus disposed at location of a key telephone system and associated with the system to produce a substitute signal and a substitute alarm in the presence of a ringing voltage when the system is deactuated. The apparatus comprises: an electrically powered lamp for displaying the substitute signal when a first voltage is applied thereto; an electrically powered device for sounding the substitute alarm when a second voltage is supplied thereto; a second source; and a circuit arrangement coupled to the first and second sources, the line, the lamp and the device. The arrangement, when the system is deactuated in the presence of the ringing voltage, produces the first and second voltages and applies same to the lamp and device respectively to cause the substitute signal to be displayed and the substitute alarm to be sounded.

REFERENCES:
patent: 4382163 (1983-05-01), White et al.
patent: 4441106 (1984-04-01), Jackson
patent: 4578542 (1986-03-01), Alderman

Affiliated with

Also associated with

Rating

Apparatus for use with key telephone systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for use with key telephone systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for use with key telephone systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1548475