About Serial Port Jumpers
The serial port jumpers on the main logic board (J2604 and J2605) permit the configuration of the system's two serial ports for either EIA-423 or EIA-232D signal levels. EIA-423 levels are the default standard for North American users. EIA-232D levels are required for digital telecommunication in nations of the European Community.
The figure below shows the jumper locations, and the table describes their function.
Figure 5-11
Table 5-3 |
Jumper |
Shunt on Pins 1 + 2 Selects |
Shunt on Pins 2 + 3 Selects |
Default Shunt on Pins |
|---|---|---|---|
|
J2604 |
EIA-232D |
EIA-423 |
2 + 3 |
|
J2605 |
EIA-232D |
EIA-423 |
2 + 3 |
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