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Title: How to detect the "busy nois" Post by: arash on January 17, 2006, 06:07:14 06:07 Hi.
Can you help me to detect the "busy nois" in phone line with pic" Thanks Title: How to detect the "busy nois" Post by: lm317 on January 17, 2006, 11:02:24 11:02 Busy tone same as dial tone(440hz). Only differences are pulse times.
(http://img17.imageshack.us/img17/9332/440hzdetector9qe.gif) |