DEC Personal DECstation 5000 User Manual page 178

D.3 EIA RS232 Communications Connectors Pin Assignments
Table D–3 (Cont.) EIA RS232 Communications Connectors Pin Assignments
Pin Source Signal
20 DTE DTR
21
22 DCE RI
23 DTE DSRS
24
25
1
Comite Consultatif International Telegraphique et Telephonique, an international consultative
committee that sets international communications standards
2
Electronic Industries Association
Connector Pin Assignments
1 2
CCITT EIA Description
108.2 CD Data terminal ready
Unconnected
125 CE Ring indicator
111 CH Data signal rate select
Unconnected
Unconnected
Connector Pin Assignments D–5