Nortel Networks 1050 Appendix A Technical specifications, X.21 cable pinouts continued, Shield

60Appendix A Technical specifications

Table 27 X.21 cable pinouts (continued)

Standard-wired		Pair number	Standard-wired
end 28-pin male	Signal name	and conductor	end 15-pin male	Notes
1	SHIELD	pair 14A	1	Note 4,5
7	SIGNAL GROUND	pair 14B	8	Note 3,5

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.

NN46110-313 02.01