Code-controlled ringer attachment for telephones

Details Code-controlled ringer attachment for telephones Code-controlled ringer attachment for telephones

H - Electricity

04

M

344/13, 379/13,

H04M 3/02 (2006.01) H04M 3/38 (2006.01)

Patent

CA 1066793

ABSTRACT OF THE DISCLOSURE A system for selectively deactivating a telephone bell on a telephone instrument whereby when a telephone number is called, an auxiliary system automatically cuts in to prevent ringing of the bell until a predetermined code is dialed or touch-toned, at which time the telephone bell is actuated.

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