Telephone call blocker

Details Telephone call blocker Telephone call blocker

H - Electricity

04

M

344/22, 379/73

H04M 1/00 (2006.01) H04M 1/677 (2006.01)

Patent

CA 1301973

ABSTRACT A telephone call blocker is used to restrict calls to prohibited numbers by opening a relay and disconnecting the telephone line. The telephone disconnect device will operate with both pulse and dual tone multi- frequency telephone protocols and is separable being located between the telephone and the jack.

614819

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