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204 Sun Fire 280R Server Owner’s Guide • January 2001
Reference for the Serial Port A and B
Connectors
The serial port A and B connectors (J2001) are DB-25 type connectors located on the
main logic board back panel. Both serial ports conform to RS-423/RS-232
specifications.
Serial Port A and B Connector Diagram
Serial Port Signals
Pin Signal Description
1 NC Not connected
2 SER_TDX_A_CONN Transmit Data
3 SER_RXD_A_CONN Receive Data
4 SER_RTS_A_L_CONN Ready To Send
5 SER_CTS_A_L_CONN Clear To Send
6 SER_DSR_A_L_CONN Data Set Ready
7 Gnd Signal Ground
8 SER_DCD_A_L-CONN Data Carrier Detect
113
25 14
113
25 14
Serial port A
Serial port B