3Com 3C900B Installation And Operating Instructions Manual page 10

4. Click Internal Modem. Then click Next.
5. If you have a free setting, you will see a
screen like this.
6
M I
ODEM NSTALLATION WITH
W 3.
INDOWS X
COM2/IRQ3 is free in this example.
ComTest might instead recommend
COM1/IRQ4, COM3/IRQ4, or
COM4/IRQ3 for your modem.
Write down the displayed settings. You'll
need to know these settings later. Click
Next.
If you do not have a free setting, you will
see a screen like this.