How to find modem com port

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4 total messages Started by Jyrki Holopainen Tue, 21 Aug 2007 18:49

#1410

Author: Jyrki Holopainen
Date: Tue, 21 Aug 2007 18:49

7 lines
1100 bytes

How can I find to which COM-port a modem is connected?
The information is found from Control Panel/System/Hardware/Device 
Manager/Modems/ModemXYZ/Properties, but how I do it from a program?


/Jyrki

Re: How to find modem com port

#1445

Author: Bruce Larrabee
Date: Mon, 27 Aug 2007 16:59

13 lines
1262 bytes

     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...

     HTH,

     Bruce

Re: How to find modem com port

#1348

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

26 lines
1823 bytes

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

Re: How to find modem com port

#1350

Author: Bob Gonder
Date: Wed, 29 Aug 2007 15:25

7 lines
1286 bytes

Jyrki Holopainen wrote:

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

You may be thinking of  TAPI
Try Googling that and see.

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