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Tl Posts:

Posted - 1/10/2002 11:30:04 PM  Show Profile  Email Poster  Edit Message
Im very new to the computer world, and I suspect that my problem will be easy to resolve: I installed a USR modem. The system recognizes it but it keeps jumping onto com port 3. The guy that sold me the modem said that there were only 2 com ports: 1 and 2. I went into diagnostics and changed it to com port 2, and when I reboot, its back on 3. I know that a mouse is on com 1. I have no idea what is on com 2 (if anything), all it says is "no modem installed". On com 3 I see my modem. Also, the little pictures of ports 1&2 look like little plugs. The one next to com 3 looks like a little box or something. Does anyone have any idea how to help me before the machine goes out of the window? Thanks for your help.


Tl Posts:

Posted - 1/11/2002 8:45:35 AM  Show Profile  Email Poster  Edit Message
Hi the person who told you that was partly right.Your computer itself has only 2 com ports.The 2 com ports are on the motherboard.But when you install a modem it will add another com port or either if you have com 2 disabled in bios,some modems will use that com port. this page will help you a little.Look where it says Avoiding Interrupt Request and Communication Port Conflicts.I dont know what model number modem you have.If its a older modem it might have jumpers on it,the jumpers might be set for a certian com port and irq, that could cause irq conflicts.You need to find what is the model of your modem.Here is another page for usr winmdoems I hope this helps

Tl Posts:

Posted - 1/16/2002 7:32:26 AM  Show Profile  Email Poster  Edit Message
Com 3 is the port used for internal software type of modems (i.e. PC-Tel) on Compaq and other Internet-PC type computers.

It is easily removed using the "Add-Remove Programs" in the Control Panel.
Once you uninstall the software modem on Com 3, then you can plug up your USR modem (with the computer and everything else turned off) and then turn the computer on.

The computer should automatically detect the new modem when you reboot the computer (with the USR installation CD #1 in the CD-ROM drive) and will install the new drivers and software automatically for you.
If it doesn't, run the "Install New Hardware" program (also found in the Control Panel) with the USR Installation CD #1 in the CD-ROM drive.

Once the new USR modem is installed correctly, go to the Control Panel, click on the "System" icon.
Under "Device Manager" tab, there should only be the USR modem listed as your only modem and you should be ready to go.

Best wishes.

Tl Posts:

Posted - 1/16/2002 7:53:41 AM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
US Robotics makes hardware controller modems and 'Winmodems'.

Winmodems create their own virtual COM port, and cannot use a 'real' port.

It sounds as if you have a Winmodem.

Is there anything wrong with the modem operation? It is normal and necessary that a Winmodem be on a COM port that is not listed in Windows' ports.


Tl Posts:

Posted - 1/16/2002 11:59:16 PM  Show Profile  Email Poster  Edit Message  pauldogs Homepage
What about internal hardware modems? How do they set up a COM port for themselves? Do they always have jumpers?

Tl Posts:

Posted - 1/17/2002 9:12:29 AM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Pauldog -
Good point.
Internal hardware modems do not always have jumpers.

"In the beginning" there was ISA, no plug and play, and internal modems always had jumpers to configure the modem's COM port. Then, with PnP and ISA, an internal modem might be configured either via PnP and/or jumpers.

Then, PCI. PCI cards will most often be jumperless and get configured/enumerated by the computer's BIOS and/or the OS. I think most hardware PCI modems still have a UART between the 'modem' (controller/DSP/DAA) and the bus; but, there is never a UART in a controllerless (win) modem.... ?


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