US Robotics Sportster Operating Instructions Manual page 12

4. Click Internal Modem. Then click Next.
5. If you have a free setting, you will see a
screen like this.
8
I M I
NTERNAL 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 in the
spaces provided on the first page of this
manual. 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.