Is it possible to recognize DTMF tones using C #

Question

I am trying to find caller ID information from a telephone line. The received caller information is in the DTMF tones (not the FSK). How can I detect these DTMF tones? Can a telephone and fax modem? The telephone and fax modem is capable of detecting FSK information, but not DTMF information.

Notes: I use C # and .NET as a development platform.

Answer 1

Yes, modems are capable of collecting DTMF. This Code Project article should have some tips on how to do this with TAPI:

http://www.codeproject.com/KB/cpp/IVR.aspx

For a more modern C # -ish project, look here:

http://www.codeproject.com/KB/IP/devangpro.aspx

Answer 2

You can try using the TAPI library, and DTMF detection is pretty simple stuff, and most of them support it. Mark this library