Nortel Networks Passport ARN Routers - Manual (Page 152)

Installing and Operating Passport ARN Routers
D-10 114200-E Rev 00
Figure D-6. Cable 7936 (X.21 Compliant)
Table D-10. X.21 Interface (Order No. 7936)
Nortel Networks Termination Remote Termination
Pin Signal Pin Signal
2 Send Data+ 2 Transmitted Data A
27 Send Data- 9 Transmitted Data B
4 Request to Send+ 3 Control A
29 Request to Send- 10 Control B
3 Receive Data+ 4 Receive Data A
28 Receive Data- 11 Receive Data B
9 Data Carrier Detect+ 5 Indication A
34 Data Carrier Detect- 12 Indication B
10 Timing+ 6 Timing A
35 Timing- 13 Timing B
1 Frame Ground 1 Frame Ground
7 Signal Ground 8 Signal Ground
Local Wire Connections
Pin 46 > 48 (GRD)
Pin 38 > 40
Pin 14 > 15
15 ft
(4.57 m)
Pin 8 Pin 1
Pin 15 Pin 9
15-position D-sub plug with M-3 jack screws
(ground shield connected to backshell)
Pin 1 Pin 25
Pin 26 Pin 50
50-position 0.8-mm plug
(ground shield connected to internal shell)
CAB0074A