Intraplant communication system

Details Intraplant communication system Intraplant communication system

H - Electricity

04

M

379/107

H04M 1/00 (2006.01)

Patent

CA 1148677

ABSTRACT OF THE DISCLOSURE This invention is an improvement in a prior art intraplant commun- ication system. It comprises one base unit composed of a handset amplifier and speaker amplifier, each with its own integral power supply and each lo- cated on a common printed circuit board. This unit also features a discon- nect device, formerly called a hook switch, which has no moving parts. Since the new device has no moving parts, long-term reliability has been substan- tially increased. Further improvements have been made in the electronic cir- cuits to improve operation on longer communication lines and to improve op- erations involving multiple stations communicating simultaneously.

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