Page card circuit for electronic key telephone system

Details Page card circuit for electronic key telephone system Page card circuit for electronic key telephone system

H - Electricity

04

M

344/14, 379/33

H04M 3/42 (2006.01)

Patent

CA 1177981

ABSTRACT OF THE DISCLOSURE A page card circuit for the key service unit of an electronic key telephone system comprised a plurality of zone circuit means, each including a passive port means oper- ative to receive a service signal and, in response thereto, to generate at least one signal indicating its status to all active port means to which it is connected and to provide a communication path either to a predetermined group of station card circuits or to a speaker outside of the system.

435925

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