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Hello,
I'd like to create a DTMF IVR application such that:
1. user calls special number from mobile phone
2. user speaks digits to the mobile phone
3. it recognizes spoken digits, calculates some kind of control sum to check if the number is proper
4. it answers to the user that number is correct or asks him to repeat the number
5. application saves recognized numbers on the server in text file
First I looked for freeware, opensource applications which can help me to create IVR. I was surprised that I haven't found a reliable and widely used one.
Since my project requires further VoIP functions I decided to invest into an SDK. I am now in the middle of testing period, if everything goes well, I tend to choose the Ozeki VoIP SIP SDK as the basis of my system. They offer a sample program for creating Winforms DTMF IVR: http://www.voip-sip-sdk.com/p_270-winforms-dtmf-i… beside other solutions. Based on the tests it sounds promising.
The deciding factors: flexibility (for further extensions); compatibility; competent, helpful and quick support; acceptable
licensing terms; no monthly fees.
I would appreciate any ideas…
Have a nice day,
WilsonS