Parameter 10Base-T [10 MHz] 100Base-TX [100 MHz]
Wave impedance [Ohms] 100 100
Category 3 or higher 5
Class C or higher D or higher
The TP cable has eight wires arranged in four pairs of twisted wires. Different color codes exist
for the coding of the wires, the coding according to EIA/TIA 568, version 1, being the one most
commonly used. In this code, the individual pairs are coded with blue, orange, green and brown
color. One wire of a pair is unicolored and the corresponding second wire is striped, the respec-
tive color alternating with white. For shielded cables, a distinction is made between cables that
have one single shield around all pairs of wires and cables that have an additional individual
shield for each pair of wires. The following table shows the different color coding systems for TP
cables:
Table 211: Color coding of TP cables:
Pairs EIA/TIA 568
Version 1
EIA/TIA 568
Version 2
DIN 47100 IEC 189.2
Pair 1 white/
blue
blue green red white brown white blue
Pair 2 white/
orange
orange black yellow green yellow white orange
Pair 3 white/
green
green blue orange grey pink white green
Pair 4 white/
brown
brown brown slate blue red white brown
Two general variants are distinguished for the pin assignment of the normally used RJ45 con-
nectors: EIA/TIA 568 version A and version B. The wiring according to EIA/TIA 568 version B is
the one most commonly used.
T568A
T3
1
R3
2
T2
3
R1
4
T1
5
R2
6
T4
7
R4
8
Pair 3 Pair 4Pair 1
Pair 2
T568B
T3
1
R3
2
T2
3
R1
4
T1
5
R2
6
T4
7
R4
8
Pair 2 Pair 4Pair 1
Pair 3
Fig. 210: Pin assignment of RJ45 sockets
2.5.4.5.3 Cable Types
For networks with more than two subscribers, hubs or switches have to be used additionally for
distribution. These active devices already have the crossover functionality implemented which
allows a direct connection of the terminal devices using straight-through cables.
TP Cable
Straight-through
cable
System Assembly, Construction and Connection
AC500-eCo > Connection and Wiring
2019/04/17 3ADR010121, 13, en_US 1219
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