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Requirements for European Operation
312410-A Rev 00
D-3
Synchronous Cabling Requirements
Refer to Figure D-1 through Figure D-3 and Table D-6 through Table D-8 for
synchronous interface cabling information.
Note the following compliance requirements:
• V.28 compliance requires the use of an Order No. 7837 cable
• V.35 compliance requires the use of an Order No. 7220 cable
• X.21 compliance requires the use of an Order No. 7224 cable
Figure D-1. Cable 7837 (V.28 Compliant)
Table D-6. WAN Interface (Order No. 7837)
Nortel Networks Termination Remote Termination
Pin Signal Pin Signal
1 Frame Ground 1 Frame Ground
2 Send Data+ 2 Send Data
3 Receive Data+ 3 Receive Data
4 Request to Send+ 4 Request to Send
5 Clear to Send+ 5 Clear to Send
6 Data Set Ready+ 6 Data Set Ready
8 Data Terminal Ready+ 20 Data Terminal Ready
(continued)
Pin 1
Pin 16
Pin 31
Pin 15
Pin 30
Pin 44
15 Feet
Pin 13
Pin 1
Pin 25
Pin 14
44-position D-Sub plug with screw locks
(ground shield connected to backshell)
25-position D-Sub plug receptacle with screw locks
(ground shield connected to backshell)
AN0081
A