Chapter 3 External Cables
100Ω T1 Cable
Function
100Ω T1 cable provides physical transmission for Abis interface
between BSC and BTS or for cascading
The 100Ω T1 cable can support 81 E1 links at most.
Appearance
The appearance of 100Ω T1 cable is illustrated in
F
IGURE
33 100Ω T1 A
PPEARANCE
Pin Description
describes the pin groups and signal description of 100Ω
T1 cable.
T
ABLE
24 100Ω T1 C
ABLE
P
IN AND
S
IGNAL
D
ESCRIPTION
Signal Name
End A Pin No.
Cable Color
End B Signals
O_TIP_0
RING_0
I_TIP_0
RING_0
25
24
23
22
White
Blue
White
Orange
1TX0+
1TX0–
2RX0+
2 RX0-
O_TIP_1
RING_1
I_TIP_1
RING_1
4
3
2
1
White
Green
White
Brown
3TX1+
3TX1–
4RX1+
4 RX1-
O_TIP_2
RING_2
I_TIP_2
RING_2
8
7
6
5
White
Gray
Red
Blue
5TX2+
5TX2–
6RX2+
6 RX2-
O_TIP_3
RING_3
I_TIP_3
12
11
10
9
Red
Orange
Red
Green
7TX3+
7TX3–
8RX3+
8 RX3-
O_TIP_4
RING_4
I_TIP_4
RING_4
44
43
14
13
Red
Brown
Red
Gray
9TX4+
9TX4–
10RX4+
10 RX4-
O_TIP_5
RING_5
I_TIP_5
RING_5
42
41
40
39
Black
Blue
Black
Orange
11TX5+
11TX5–
12RX5+
12 RX5-
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45