AT&T DataPort PCX Modem User Manual page 20

Internal Modem Installation
Table 3-1. COM Port and Interrupt Settings
COMPort/IRQ Address
COM1/IRQ4
COM2/IRQ3
COM3/IRQ4
COM4/IRQ3
COM3/IRQ2
COM4/IRQ2
COM3/IRQ5
COM4/IRQ5
Bold indicates factory setting.
7. Carefully insert the modem card into the expansion slot
and fasten the metal bracket.
Hold the modem so that the bracket with the phone jacks
faces the rear of the PC. Press down until the contacts along
the bottom edge of the modem are seated firmly in the
expansion slot connector. Fasten the bracket with the screw
that was removed in Step 3.
8. Replace the cover on the PC.
9. Connect the line cord. See Figure 3-2. Plug one end of the
modular telephone cord into the connector labeled LINE.
10. Connect a telephone. Plug the line cord of your telephone
into the modular connector labeled PHONE. A telephone is
not required for modem operation.
11. Plug in and turn on your PC and continue with
Chapter 4, Testing Your Modem , to verify your
installation.
!
WARNING:
In the future, any time you remove the cover of your PC, first
ensure that the telephone line cord has been detached from
the modem.
Pos 1 Pos 2 Pos 3 Pos 4 Pos 5 Pos 6
3F8-3FF ON
2F8-2FF Off
3E8-3EF ON
2E8-2EF Off
3E8-3EF ON
2E8-2EF Off
3E8-3EF ON
2E8-2EF Off
ON Off Off
ON Off ON
Off Off Off
Off Off ON
Off ON Off
Off ON Off
Off Off Off
Off Off Off
Issue 2 July 1995
ON Off
Off Off
ON Off
Off Off
Off Off
Off Off
Off ON
Off ON
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