Nortel Passport ARN Routers Installation And Operating page 151

Pin 1
Pin 16
Pin 31
44-position D-Sub plug with screw locks
(ground shield connected to backshell)
Figure D-5. Cable 7224 (X.21 Compliant)
Table D-9.
Nortel Networks Termination
Pin Signal
2 Send Data+
16 Send Data-
4 Request to Send+
18 Request to Send-
3 Receive Data+
17 Receive Data-
9 Data Carrier Detect+
23 Data Carrier Detect-
10 Send Timing+
24 Send Timing-
7 Signal Ground
1 Frame Ground
Pin 41 > 43
Pin 28 > 30
Pin 14 > 15
114200-E Rev 00
X.21 Interface (Order No. 7224)
Local Wire Connections
Requirements for European Operation
15 Feet
Pin 1
Pin 15
Pin 30
Pin 9
Pin 44
15-position D-Sub plug with locking posts
(ground shield connected to backshell)
Remote Termination
Pin Signal
2 TD A
9 TD B
3 Control A
10 Control B
4 RD A
11 RD B
5 Indication A
12 Indication B
6 Timing A
13 Timing B
8 Signal Ground
1 Frame Ground
Pin 8
Pin 15
CAB0068A
D-9