Line circuit for use with a key telephone system

Details Line circuit for use with a key telephone system Line circuit for use with a key telephone system

H - Electricity

04

M

379/17, 379/33,

H04M 1/00 (2006.01) H04M 3/42 (2006.01) H04M 9/00 (2006.01)

Patent

CA 1052024

ABSTRACT OF THE DISCLOSURE Where is provided a line circuit for connection to a key telephone system for indicating an incoming call, a call placed on hold and an answered call. There is further provided a means for automatically indicating that the incoming call has been placed on hold for a predetermined time period. There is further provided a solid state device which switches telephone instrument lamp current for visual indication of the various line circuit operations.

249400

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