Digital Equipment Digital AlphaStation 400 Series, User Information

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Technical Specifications
Serial Port Connectors
The serial port connectors consist of two 9-pin D-submini connectors. Table C-6 lists their
pin assignments.
The baud rates supported by the system's serial ports are 300; 1200; 2400; 4800; 9600;
19,200; and 38,400.
Table C-6. 9-Pin Serial Port Pinouts
DB9 Pin Signal Function
1 DCD Data carrier detect
2 RXD Receive data
3 TXD Transmit data
4 DTR Data terminal ready
5 GND Ground
6 DSR Data set ready
7 RTS Request to send
8 CTS Clear to send
9 RI Ring indicator
Keyboard and Mouse Connectors
The keyboard and mouse connectors consist of two 6-pin mini-DIN connectors. Table C-7
lists their pin assignments.
Table C-7. Keyboard and Mouse Connector Pinouts
Pin Signal
1 Data
2 Reserved
3 Ground
4 +5 V dc (fused)
5 Clock
6 Reserved
C-4