Switch bypass for a public safety calling system

Details Switch bypass for a public safety calling system Switch bypass for a public safety calling system

1992-11-12

1995-09-26

Chan, Wing F.

Telephonic communications

Emergency or alarm communications

Central office responsive to emergency call or alarm

379 48, 379221, 379279, H04M 1104

Patent

active

054540259

ABSTRACT:
A switch bypass (10) for a Public Safety Calling System (12) having a first switch A for routing telephone calls, a second switch B for routing telephone calls, and a device 14a and 14b for bypassing the first switch A responsive to a failure in the first switch, and for transferring the call to the second switch B.

REFERENCES:
patent: 3909545 (1975-09-01), Fuchs
patent: 3978291 (1976-08-01), Bergeron et al.
patent: 4119815 (1978-10-01), Frankfort et al.
patent: 4286118 (1981-08-01), Mehaffey et al.
patent: 4400587 (1983-08-01), Taylor et al.
patent: 4455645 (1984-06-01), Mijioka et al.
patent: 4731825 (1988-03-01), Wojcinski et al.
patent: 4774703 (1988-09-01), Force et al.
patent: 4807280 (1989-02-01), Posner et al.
patent: 4907253 (1990-03-01), Watrous
patent: 4943999 (1990-07-01), Ardon
patent: 4972465 (1990-11-01), Cline et al.
patent: 5058105 (1991-10-01), Mansour et al.
patent: 5187706 (1993-02-01), Frankel et al.
patent: 5259027 (1993-11-01), Winter et al.

Affiliated with

Also associated with

Rating

Switch bypass for a public safety calling system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switch bypass for a public safety calling system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switch bypass for a public safety calling system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1556892