Method and apparatus for returning a false special...

Details Method and apparatus for returning a false special... Method and apparatus for returning a false special...

H - Electricity

04

M

H04M 1/663 (2006.01) H04M 1/50 (2006.01) H04M 1/57 (2006.01) H04M 3/56 (2006.01) H04M 7/00 (2006.01) H04M 15/06 (2006.01) H04M 19/02 (2006.01) H04M 19/08 (2006.01) H04M 3/51 (2006.01)

Patent

CA 2411767

A method and apparatus (10) for returning a false signal substantially similar to at least a first portion of a special information tone (SIT) after a device receiving an incoming telephone call puts the telephone line (11) in an off- hook condition is provided. The apparatus includes: a power distribution member (30); a mode selection member (28), a programmable oscillator (18); an off-hook detector (14); and, a controller (12). The method includes the steps: selecting a mode of operation from a group of multiple operating modes; detecting an off-hook condition in the telephone line; generating a false signal according to the selected SIT and the selected mode of operation; and, sending the false signal over the telephone line in response to the incoming telephone call once the off-hook condition is detected.

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