3G Modem Voice functionality

NeoGetz0 asked:

Most of the 3G modem (USB sticks) are support voice call, but all of them can do this only through the dashboard software which is shipped with them.
Do you have any information, how to get the voice from and pass the mic data to the 3G modem?
When I plug it, it installs 4 COM ports:
NEMA
Diagnostic
Application Interface
standard COM port which can be used to pass AT commands.
So currently via the standard COM port I can pass the ATDT12345678 command to call a number, the connection established, and the other end is ringing. When I answer to the call, I don't hear anything neither on the computer which the 3G modem is connected to nor on the called phone.

Any answer or workaround is appreciated.
FYI: I'm using Delphi for developing

Tags: Delphi, USB, Modem

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