30
RJ45 E
THERNET
P
IN
A
SSIGNMENTS
C
HAPTER
9
D
EVICE
M
ANAGEMENT
For RJ-45 cable specifications, refer to the following table.
9.3. RJ45 Ethernet Pin Assignments
With 10/100/1000BASE-T(X) cables, pins 1 and 2 are used for transmitting data, and pins 3 and 6 for
receiving data.
10/100 Base-T(X) RJ-45 pin assignments are as follows:
1000 Base-T RJ-45 pin assignments are as follows:
CABLE
TYPE
MAXIMUM LENGHT
10BASE-T
Cat. 3, 4, 5 100 Ω
UTP 100 m (328 ft)
100BASE-TX
Cat. 5 100 Ω UTP
UTP 100 m (328 ft)
1000BASE-T
Cat. 5/Cat. 5e 100 Ω UTP
UTP 100 m (328 ft)
PIN #
TYPE
ASSIGNMENT
1
10/100 Base-T(X)
TD+
2
10/100 Base-T(X)
TD-
3
10/100 Base-T(X)
RD+
4
10/100 Base-T(X)
Not used
5
10/100 Base-T(X)
Not used
6
10/100 Base-T(X)
RD-
7
10/100 Base-T(X)
Not used
8
10/100 Base-T(X)
Not used
PIN #
TYPE
ASSIGNMENT
1
1000 Base-T
BI_DA+
2
1000 Base-T
BI_DA-
3
1000 Base-T
BI_DB+
4
1000 Base-T
BI_DC+
5
1000 Base-T
BI_DC-
6
1000 Base-T
BI_DB-
7
1000 Base-T
BI_DD+
8
1000 Base-T
BI_DD-
