Digital Equipment DEC 3000 500X AXP Owner's Manual page 209

Synchronous/Asynchronous Communications Port
Table B–2 (Cont.) Synchronous/Asynchronous
Pin
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
international consultative committee that sets international communications
standards.
2
B–4 Port Pin-outs
Communications Port Pin-outs
Source Signal
Modem/printer CD
KN15 DTR
Modem/printer RI
International Telegraph and Telephone Consultative Commiittee (CCITT), an
Electronic Industries Association
1 2
CCITT EIA Description
109 CF Carrier detector
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
108.2 CD Data terminal ready
Not used
125 CE Ring indicator
Not used
Not used
Not used