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RJ-45 Serial Port
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 pin-out 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 (See figure below, B).
For serial devices that require a DCD signal, the jumper must be in
position 1-2 (See figure below, A).
For server applications that require a DB9 serial connector, you must
use an 8-pin RJ-45-to-DB9 adapter. The following table defines the pin-
out required for the adapters to provide RS232 support.
RJ-45 Signal Abbreviation DB9
1 Request to Send RTS 7
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