Sun Microsystems 280R manual Reference for the Serial Port a and B Connectors, Serial Port Signals

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 A	13	1
	25	14

13 1

Serial port B

2514

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

204 Sun Fire 280R Server Owner’s Guide • January 2001