1000Base Straight-Through Cable; 1000Base Crossover Cable; Cable Guidelines - Allied Telesis AT-8900 Hardware Reference Manual

Hardware Reference
1000BASE
straight-through
cable
1000BASE
crossover cable
Model Port Type
AT-8948 10BASE-T
100BASE-TX
AT-9924T/4SP 10BASE-T
AT-9924T 100BASE-TX
AT-9924Ts 1000BASE-T
AT-A62
AT-8948 1000BASE-X
AT-9924T/4SP
AT-9924T
AT-9924SP
AT-A61
1. Refer to the IEEE Standard 802.3 for additional cable information
Software Release 3.0.2
C613-03092-00 REV C
For 1000BASE network connections, all four pairs are used and the cable is
wired in a straight-through configuration. You can use this cable with the
software test facility to test 1000BASE network ports. The following table lists
pin assignments for a 10/100/1000BASE-T RJ-45 four pair straight-through
cable.
End 1
Pin Pair
1 Pair 1+
2 Pair 1-
3 Pair 2+
6 Pair 2-
4 Pair 3+
5 Pair 3-
7 Pair 4+
8 Pair 4-
For 1000BASE test cables, all four pairs are used and the cable is wired in either
a crossover or straight-through configuration. The following table lists pin
assignments for a 10/100/1000BASE-T RJ-45 four pair crossover cable.
End 1
Pin Pair
1 Pair 1+
2 Pair 1-
3 Pair 2+
6 Pair 2-
4 Pair 3+
5 Pair 3-
7 Pair 4+
8 Pair 4-

Cable Guidelines

The following table lists port, connector, and cable combinations for switch
models and expansion modules.
Connector Type
RJ-45
Varies with SFP
End 2
Pin
1
2
3
6
4
5
7
8
End 2
Pin
1
2
3
6
4
5
7
8
1
Cable Type
CAT5
CAT5E
Refer to documentation
packaged with SFP
31
Pair
Pair 1+
Pair 1-
Pair 2+
Pair 2-
Pair 3+
Pair 3-
Pair 4+
Pair 4-
Pair
Pair 2+
Pair 2-
Pair 1+
Pair 1-
Pair 4+
Pair 4-
Pair 3+
Pair 3-
Maximum Cable Length
100m Max
120m Max
Refer to documentation
packaged with SFP