Hi,
Do anyone know how to detect busy flag and dial tone of a 2 wires telephone line by MCU and telephone related IC?
Thanks!
Busy flag and Dial tone
Dec 25, 2004
1 Replies
A call progress detector would do the trick, such as an MX663:
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or a modem chip would suffice, such as a CMX867 -
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I just grabbed these examples in a quick search, you want to see what is available once you know the key terms to search for. A modem chip may be more easily obtainable than a call progress detector, though the latter would, at first thought anyway, be easier to program. In a pinch you could get a PIC with a modem built-in and use that.
Ken
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