
Installing Synchronous Net Modules in an ASN Platform
Cabling Requirements for the Net Modules18 BNX Software Version <x.x> Test Part Number
X.21 Compliance
X.21 compliance for the net modules is as follows:
• The Dual Sync net module requires a 44-pin D-Sub to X.21 cable, Order No.
7224 (Table A-11 and Figure A-9).
• The Quad Sync net module requires a 50-pin to X.21 cable, Order No. 7936
(Table A-12 and Figure A-10).
Table A-11. Pin-to-Pin Connections for the 44-Pin D-Sub to X.21 Cable
(Order No. 7224)
Bay Networks Termination Remote Termination
Signal Pin to Pin Signal
Send Data+ 2 2 Transmitted Data A
Send Data- 16 9 Transmitted Data B
Request to Send+ 4 3 Control A
Request to Send- 18 10 Control B
Receive Data+ 3 4 Receive Data A
Receive Data- 17 11 Receive Data B
Data Carrier Detect+ 9 5 Indication A
Data Carrier Detect- 23 12 Indication B
Send Timing+ 10 6 Timing A
Send Timing- 24 13 Timing B
Signal Ground 7 8 Signal Ground
Frame Ground 1 1 Frame Ground
Internal Wire Connections
Pin 14
> 15
Pin 28
> 30
Pin 41
> 43
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