User Accessible Interconnects; Serial Port - Intel SR870BN4 - Server Platform - 0 MB RAM Product Manual

User Accessible Interconnects

Serial Port

The I/O riser card provides one RS-232C serial port. The serial port uses a D-subminiature 9-pin
connector. The serial port can be used either as an emergency management port or as a normal
serial port. As an Emergency Management Port (EMP), the serial port is used as a communication
path by the Server Management RS-232 connection to the BMC. This provides a level of
emergency management through an external modem or direct serial connection. The RS-232
connection can be monitored by the BMC when the system is in a powered down (standby) state.
Figure 129 shows the serial port connector, and Table 46 provides the pinout information.
Table 36. Serial Port Connector Pinout
Pin Signal
1 DCD_L
2 RXD
3 TXD
4 DTR_L
5 GND
6 DSR_L
7 RTS_L
8 CTS_L
9 RI_L
256
1
6
9
5
OM12973
Figure 129. Serial Ports A and B
Description
Data carrier detected
Receive data
Transmit data
Data terminal ready
Ground
Data set ready
Request to send
Clear to send
Ring indicator
Intel® SR870BN4 Server System Product Guide