Actiontec electronic Plug n' Play Voice/Fax Modem V.90 ISA - Manual (Page 31)

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Figure 6: Jumpers Set To Plug-N-Play (default setting)
The Jumper Block JP1 is used to select the desired COM Port for the modem. Figure
7 shows the selections for each COM Port.
Figure 7: JP1 COM Port Options
Jumper Block JP2 is used to select the IRQ (interrupt request) settings for the mo-
dem. Figure 8 details the possible selections.
Figure 8: JP2 IRQ (interrupt request) Options