15
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 |
| | | |
