Is it possible to detect DTMF tones using C#

Question

I am trying to detect caller id information from telephone line. The caller-id information received is in DTMF tones (not FSK). How can I detect this DTMF tones ? Is Phone and Fax Modem capable of it ? The Phone and Fax Modem is capable of detecting FSK information, but not DTMF information.

Notes: I am using C# language and .NET as developing platform.

score 4 · Accepted Answer · answered May 10 '11 at 14:16

4

Yes, modems are capable of picking up DTMF. This Code Project article should have some clues on how to do it 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

answered May 10 '11 at 14:16

Robert Harvey

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Thanks for inputs.. I will try to implement it and get back to you in case of difficulties. – Marshal May 10 '11 at 14:22

score 3 · Answer 2 · answered May 10 '11 at 14:16

3

You can try using a TAPI library and detecting DTMF is pretty basic stuff and most of them support it. Check out this library

answered May 10 '11 at 14:16

Bala R

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Is it possible to detect DTMF tones using C#

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