4 Pin Assignment for the Wires of the E
1. Pin assignments for the wires of the
75-ohm E1 coaxial cable
2
1
X1
Wi
T
C
i l SN
X1
Wire Type
Coaxial SN
Label
1
Tip
1
RX1
2
Ring
3
Tip
3
RX2
4
Ring
5
Tip
5
RX3
5
RX3
6
Ring
7
Tip
7
RX4
8
Ring
19
Tip
2
TX1
20
Ring
21
Tip
21
Tip
4
TX2
22
Ring
23
Tip
6
TX3
24
Ring
25
Tip
8
TX4
26
Ring
HU
1
E1 Cable
O
/ hit
Blue/white
2. Pin assignments for the wires of the
120-ohm E1 twisted pair cable
X1
Wi
C l
Wi
T
Green/white
Brown/white
Gray/white
Blue/red
Orange/red
Green/red
Orange/white
X1
Wire Color
Wire Type
Label
1
Blue
Twisted pair
RX1
2
White
3
Orange
Twisted pair
RX2
4
White
5
Green
T i t d
i
RX3
Twisted pair
RX3
6
White
7
Brown
Twisted pair
RX4
8
White
19
Gray
Twisted pair
TX1
20
White
21
Blue
21
Blue
Twisted pair
TX2
22
Red
23
Orange
Twisted pair
TX3
24
Red
25
Green
Twisted pair
TX4
26
Red
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h
518129
9
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People’s Republic of China
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