Standard RJ45 connections for CAT5 cable
pin t568a t568B Signal
n° pair wire colour pair wire colour
1 3
2 VIDEO +
2 3
2 VIDEO -
3 2
3 AUDIO +
4 1
1 POWER +
5 1
1 POWER -
6 2
3 AUDIO -
7 4
4 SCS-
8 4
4 SCS+
The four pairs are identied with dierent colours and each pair carries a dierent type of signal (see Table 1).
taBle 1
Two standards (T568A and T568B) of wires connection, both suitable, although it is recommended that they are not mixed in
the same installation. Table 1 shows the two standards.
87654321
12345678
Pair 1Pair 3
Pair 2
Pair 4
Where is Pin #1?
Pair 1Pair 3
Pair 2
Pair 4 Pair 1Pair 2
Pair 3
Pair 4
T568A T568B
33
GUIDED45 SyStEm
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