Dialer detecting end user hookup

[Bruce]

Have a look at some of these examples. You might find something useful.
http://www.melabs.com/resources/samples.htm#xtpbp

[lerameur]

Bruce,

interesting program, but I am still a bit confused. Seems to me that this program act like both the dialer and receiving end.
This line in the program: IF (j > 60) OR (key = 12) Then stop_ringing
seems to only stop ringing if the person dialing decide to stop the ringing or the counter finishes its loop.
What about if the person at the other picks up the telephone, how would it know to stop ringing?
thanks

Ken

[Bruce]

I have not looked at or used any of these code examples, but they do show how to detect
off-hook conditions and a lot more. Just figured you could find something useful in there
somewhere.

[ardhuru]

In the old days, the voltage polarity on the line used to flip when the called party lifted the phone; very easy to detect using an opto. Havent tested if this is still the case for a long time.

Regards,

Anand