5634BIF User’s Manual
5
your serial or multifunction I/O card at one COM port and your modem at another.
The COM port setting is a "logical" address, and has nothing to do with the slot in which
the modem(or serial adapter) is installed.
To change the default COM port setting from COM1 to another setting :
1. Set the switches ( jumpers ) on the modem to specify COM2, COM3, or COM4. Figure
1-1 shows the switch locations on the modem. Table 1-1 describes the setting.
2. Configure your communication software to the new COM port and IRQ settings.
3
4
5
7
9
10
11
12
S HORT
15
IRQ
OPEN
A
B
C
D
5634BIF
Figure 1-1 View of the modem
Table 1-1 modem switch (jumper)settings
COM Port
A
B
C
D
Hex
Address
IRQ
COM1
ON
OFF
ON
OFF
3F8 to 3FF
4
COM2
ON
OFF OFF
ON
2F8 to 2FF
3
COM3
OFF
ON
ON
OFF 3E8 to 3EF 4,5,9,10,11,12,15
COM4
OFF
ON
OFF
ON
2E8 to 2EF 3,5,9,10,11,12,15
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