Accessing POTS modem through framework?

  • Thread starter Thread starter PMac
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PMac

Is using an analog modem simply a dead art form or is there still
functionality within the .NET Framework for accessing a modem on the
computer, sending AT commands and sending/receiving character data? At a
very minimum, I'd like to develop a small application that will dial a list
of phone numbers from a phonebook and check the modem response strings to
see if the call is answered or not.

Does anyone have any experience with this using the .NET Framework? Any
help/suggestions would be greatly appreciated.

Thanks in advance,
Patrick
 
 
Hi,
I'd like to develop a small application that will dial a list
of phone numbers from a phonebook and check the modem response strings to
see if the call is answered or not.
<<

There is nothing in the current framework, though there are LOTS of serial
classes and add-on (I have some in my book, below, and you can download
NETComm.ocx from my homepage) -- google will provide a number of "hits."

However, you are asking to do something that modems don't do. Thus, no
serial class or add-on will help you with part of the task. You certainly
can dial (and if answered by a modem, you can tell, because carrier detect
is raised). However, if answered by a human -- in other words, a voice
call, 99% of all modems do not provide ANY indication. Thus, that part of
the equation is not possible.

There are voice telephony boards that will do this, but not most modems.

Dick

--
Richard Grier (Microsoft Visual Basic MVP)

See www.hardandsoftware.net for contact information.

Author of Visual Basic Programmer's Guide to Serial Communications, 4th
Edition ISBN 1-890422-28-2 (391 pages) published July 2004.
 
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