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Serial Ports
The rear RJ-45 serial port is a fully functional serial port that supports any standard serial device
and provides support for serial concentrators. For server applications that use a serial concentrator
to access the server management features of the baseboard, a standard 8-pin CAT-5 cable from the
serial concentrator is plugged directly into the rear RJ-45 serial port. The 8 pins of the RJ-45
connector can be configured to match either of two pinout standards used by serial port devices. To
accommodate either standard, the J5A2 jumper block located directly behind the rear RJ-45 serial
port must be jumpered appropriately according to the desired standard.
NOTE
By default, the RJ-45 serial port is configured to support a DSR signal.
For serial devices that require a DSR signal (default), the J5A2 jumper must be configured in
position 3-4 (Figure 41, B).
For serial devices that require a DCD signal, the jumper must be in position 1-2 (Figure 41, A).
110
A
5
DCD-DTR to Pin #7
6
2
Figure 41. J5A2 Jumper Block for DSR Signal
C
DSR-DTR to Pin #7
B
5
6
2
TP138
Technical Reference
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