How to make an IVR call using AT Command

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ATCommands

Hi All,

I'm using GPRS MODEM(WS-8001 AS) and testing AT Commands.
Now, I want to make a call to customer care from my GPRS MODEM.
I tried

ATD(<num>); 

It returned "OK" for me back.

As per this reference I followed to proceed to send further options
http://www.activxperts.com/xmstoolkit/atcommands/dtmf/[^]

The Actual question is, "Will we get any response from provider to modem back after/Before sending DTMF tones??.."
"How to find my option is correct on that current IVR Menu ??"..

Please help me..


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Thanks,
Yugeshkumar v