H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/33, 379/44,
H04M 13/00 (2006.01) H04M 1/72 (2006.01) H04M 3/56 (2006.01) H04Q 5/20 (2006.01)
Patent
CA 1115867
Abstract of the Disclosure The exclusion system is employed with a central office/ private branch exchange (CO/PBX) system and a party line paging and intercom system. A first circuit is coupled to the "A" lead of the party line system, and is responsive to a predetermined potential on this "A" lead to couple a tip conductor and a ring conductor of an associated subset of the party line system to the tip and ring conductors of a selected one of the CO/PBX system and the party line system. A second circuit is coupled to the "A" lead of the party line system to manually generate a first exclusion potential for the party line system to exclude subsets not already con- nected to the party line system. A third circuit is coupled to the "A" lead of the CO/PBX system and is responsive to a given potential on this "A" lead to automatically produce a second exclusion potential on this "A" lead to exclude subsets not already connected to the CO/PBX system. - 1 -
319208
International Standard Electric Corporation
Smart & Biggar
LandOfFree
Exclusion system for a key telephone 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 Exclusion system for a key telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exclusion system for a key telephone system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-662531