3Com 3C900B Installation And Operating Instructions Manual page 13

If you do not have a sound card, use
COM3/IRQ5. Write "COM3" and "IRQ5"
somewhere where it will be handy during
software installation. You will have to change
the settings on your modem. Go to "How to
Change the Modem's Settings" on page 10.
If you do have a sound card, use
COM2/IRQ3. To use this setting, you have to
first disable your computer's second serial port
(COM2). This is a pronged socket on the
back of your computer.
Go to your computer manufacturer's
manual.
Find out how to disable the COM port.
Find out which of the sockets on the back
of your computer is the second serial port.
If you have something plugged into that
port, find out if you can plug it in
somewhere else. Any accessory plugged
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ODEM NSTALLATION WITH
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into that port will not work after the port
has been disabled.
Then return to this point in this manual to
continue.
After disabling COM2, you can use the
COM2/IRQ3 setting.
Write "COM2" and "IRQ3" somewhere
where it will be handy during software
installation and go to "How to Change the
Modem's Settings" on page 10.
If ComTest reports that "You do not
have any available COM ports and/or
IRQs"
We recommend you disable COM1 or
COM2. When you disable one of these COM
ports, you can use it and its default IRQ for
your modem. Go to your computer
manufacturer's manual.
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