leilarazavi2000
Member level 2
Hi all
How can I detect busy Line Phone with MCU ?
thanks
How can I detect busy Line Phone with MCU ?
thanks
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It is line in use indicator, not phone busy indicatorif line is busy the voltage droped to 6 v.
budhy said:Line Busy Tone is Low Tone on and off every .5 seconds.
(Low Tone is 480 Hz and 620 Hz at -24 dBm0/frequency.)
To detect Line Busy Tone with MCU, you have to filtered the tone and than detect on and off signal every .5 seconds