Signaling system

Details Signaling system Signaling system

H - Electricity

04

M

H04M 11/00 (2006.01) H04M 1/215 (2006.01) H04M 1/60 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2401937

Standard telephone handset ports provide a bias voltage for any attached peripheral devices. The present invention provides bi-directional control signaling where telephone sets vary the bias voltage for detection by peripheral devices and where the peripheral devices provide short, load, and no-load conditions for detection by the telephone sets using the bias voltage.

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