Re: How to find modem com port

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#1348

From: Jyrki Holopainen
Date: Tue, 28 Aug 2007 18:10

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Bruce Larrabee wrote:
> 
>     Hello Jyrki ---
> 
>     Well a 'quick and dirty' solution would be to
>     poll the com ports, say COM1 - COM4 or COM1 - COM6
>     or whatever, till you find a functioning modem.
> 
>     I know it's crude so it may or may not be sufficient
>     for your app...

I currently try to open serial ports (COM1 - COM32) and show only the 
ports that exist. I would also like to show the modem name after the 
com-port in the selection list.

I could send command "AT" to every com port and see what is the 
response, but that does not necessarily work since some modems do not 
response if the serial speed is not correct. Some internal modems also 
have more than one serial port, but only one of them can be used for 
dialing.

I understand that there is a direct way to get get information about 
installed devices and their properties.

/Jyrki

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