Telephone station signaling lock circuit

Details Telephone station signaling lock circuit Telephone station signaling lock circuit

H - Electricity

04

M

379/23

H04M 1/50 (2006.01) H04M 1/673 (2006.01)

Patent

CA 1206642

TELEPHONE STATION SIGNALING LOCK CIRCUIT ABSTRACT OF THE DISCLOSURE A circuit which locks the signaling circuit of a telephone station. A microprocessor disconnects a keypad from an associated tone generator upon detection of operation of a lock button. The microprocessor connects the keypad to the tone generator upon detec- tion of operation of the lock button and a predeter- mined unlock code provided by the keypad.

443331

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