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96 cc2300 Carrier Grade Server Product Guide
Serial Port Connector (Back Panel)
An RJ45 connector on the back panel I/O supplies a serial interface (see Table 17). The interface
may be used either as an emergency management port (EMP) or as a normal serial port. As an
EMP, COM2 is used as a communication path by the server management software that provides a
level of emergency management through an external modem. Table 17 describes the serial port’s
connections.
If the system is configured for both back and front panel serial port operation, by default the back
panel connector is enabled and the front panel connector is disabled. Plugging a cable into the front
panel connector disables the back panel connector and enables the front panel connector (if pins
4 and 5 are connected together).
Figure 31. Serial Port Connector
The rear serial port is a fully functional COM port and will support any standard serial device as
well as providing support for serial concentrators, which typically support RJ45 serial connectors.
For those 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 RJ45 serial port. The 8 pins of the RJ45 connector can be configured to match either of
two pin-out standards used by serial port concentrators. To accommodate either standard, the
J6A2 jumper block, located directly behind the rear RJ45 serial port, must be jumpered
appropriately according to the desired standard (see Figure 33).
Table 17. Serial Port Connector Pinout
Pin Signal Description
1 RTS Request to send
2 DTR Data terminal ready
3 TXD Transmit data
4 GND Ground
5 RIA Ring indicator
6 RXD Receive data
7 DSR/DCD Date set ready / data carrier detect
1
8 CTS Clear to send
1
Use jumper on server board to select
NOTE
By default as configured in the factory, the cc2300 Carrier Grade Server
baseboard will have the rear RJ45 serial port configured to support a DSR
signal.