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Technical Reference 93
Serial Ports
One serial port is provided on the rear I/O to supply COM2 using an 8-pin RJ45 connector (see
Table 13). The COM2 serial port can be used either as an emergency management port or as a
normal serial port. As an emergency management port (EMP), COM2 is used as a communication
path by the server management software that provides a level of emergency management through
an external modem. Figure 37 describes the serial port’s connections.
Figure 37. Serial Ports A and B
Table 13. Serial Port Connector Pinout
Pin Signal Description
1 RTS Request to send
2 DTR Data terminal ready
3 TXD Transmit data
4 GND
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