Nortel Networks Accelar 1050 - Manual (Page 60)

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Appendix A Technical specifications
NN46110-313 02.01
The following notes apply to the single X.21 cable:
1. Wires of pair 4 connect to wires of pair 5, but not to any pins in the DA-15.
2. The term “no conn” means the wire is not connected to a pin in the 15-pin connector.
3. Wires 13B and 14B connect to pin 8 in the 15-pin connector.
4. At each end, the cable shield and connector shell must connect to pin 1 of the connector.
5. Do not interconnect Shield to Signal Ground because these are separate signals.
1 SHIELD pair 14A 1 Note 4,5
7 SIGNAL GROUND pair 14B 8 Note 3,5
Table 27 X.21 cable pinouts (continued)
Standard-wired
end 28-pin male Signal name
Pair number
and conductor
Standard-wired
end 15-pin male Notes