Information Technology Reference
In-Depth Information
Full 4 pair jack wiring
(For one 10/100/1000BaseT connection)
Station
cable
Wiring
T568A:
W/G
G/W
W/O
B/W
O/W
W/Br
Br/W
W/B
W/B
T568B:
W/O
O/W
W/G
B/W
G/W
W/Br
Br/W
Internal jack
wiring
Br
B
O
Bk
R
G
Y
W
Jack pins
1
3
4
5
6
7
8
2
"Duplex" wiring
(4 Pair cable split to two 10BaseT jacks)
W/O
W/B
O/W
B/W
W/B
W/O
-
-
-
-
B/W
O/W
-
-
-
-
T568A
T568B
W/Br
W/G
Br/W
G/W
W/G
W/Br
-
-
-
-
G/W
Br/W
-
-
-
-
B
O
Bk
R
G
Y
Br
W
B
O
Bk
R
G
Y
Br
W
1
2
4
5
6
7
8
1
2
3
4
5
6
7
8
3
Jack 1
Jack 2
Legend
W
White
Br
Brown
B
Blue
R
Red
O
Orange
Bk
Black
G
Green
Y
Yellow
FIGURE 2.5
Typical 10/100/1000 BaseT jack wiring using TIA-568 Structured Cabling.
(NOTE: Some connector jacks' internal wiring may present some confusing variations in wire
colors and numbering. Note that the wiring colors may be completely different from those of
the station cable, and the plates sometimes have numeric markings that do not correspond to
the pin numbering of the jack itself.)
component, and installation standards should be in accordance with TIA/EIA-568-
C Category 3 (for 10 Mb) or
higher
(preferably Category 5e or higher for today's
networking speeds of 100 to1000 Mbps). Note that either T568A or T568B modu-
lar jack wiring patterns will support 10/100BaseT. Just be sure that you use the same
patterns at each end of the cable, whether in the wall or as a user/patch cord.
Termination of the wires is covered in detail in Part Two.
