Panasonic 135FP Operating Instructions Manual page 74

Installing the Panasonic Class 2 Fax Modem
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Select Don't detect my modem; I will select it
from a list.
Click the Next button.
Click the Have Disk...
Enter D:\Setup.
(Where "D:" is your CD-ROM drive.)
OK
Click the button.
Select Panasonic DP-130 or DP-150 Class 2
Fax Modem.
Next
Click the button.
button.