Detecting Telephone Signals

[lidestructive]

Hi, is there anyone here who knows how to detect ringback, answer, and busy signals? I am doing an autodialer project using MT8889 and am finished with the tone dialing sequence.

 

[serggi]

I need this infotmation too

Hi, I'm also working on a project related whit phones and I need to know how the thelephone detects dial tone, busy line tone and hungup. If you find some information could you let me know please.
Tank you

 

[Electric Rain]

:lol: You two are in luck! Here, try this place: **broken link removed** This place might be good. Let me know how that works for you. :wink:

 

[sedaya]

hi there... actually i face a problem of detecting phone sgnal, but from mobile phone. can u help me?? do you have any circuit???