User manual

AT-1720
24
Figure 2: Usable and Unusable 10BASE-T Cable
Not Used
RD-
Not Used
Not Used
RD+
TD-
TD+
Not Used
Not Used
RD-
Not Used
Not Used
RD+
TD-
TD+
Not Used
RJ45 Pin
RJ45 Pin
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
1
Pair twisted as per Level 3, 4 or 5 cable.
1
A
Not Used
RD-
Not Used
Not Used
RD+
TD-
TD+
Not Used
Not Used
RD-
Not Used
Not Used
RD+
TD-
TD+
Not Used
RJ45 Pin
RJ45 Pin
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
This cable will not work for 10BASE-T. 
Note that 3 and 6 are twisted, but are not a pair.
B