Chapter 3 External Cables
S.No. Name
Signal Description
Cable
Serial
No.
(End B)
Pin No.
(End A.)
9
transmits (micro-
coaxial 5 signal)
6- inside
8
10
E1_TX2-
transmits signal -(micro-
coaxial 5 shielding ground
6-
outside
7
11
receives (micro-
coaxial 6 signal)
5- inside
6
12
E1_RX2-
receives signal -(micro-
coaxial 6 shielding ground
5-
outside
5
13
transmits (micro-
coaxial 7 signal)
8- inside
12
14
E1_TX3-
transmits signal -(micro-
coaxial 7 shielding ground
8-
outside
11
15
receives (micro-
coaxial 8 signal)
7- inside
10
16
E1_RX3-
receives signal -(micro-
coaxial 8 shielding ground
7-
outside
9
120Ω E1 Cable
Function
120Ω E1 cable provides physical transmission for Abis interface
between BSC and BTS or for cascading
Appearance
There 120Ω E1 cable is classified in to two types according to the
E1 link support.
The 120Ω E1 cable (A) that shown in
, supports 8 E1 links
at most. The 120Ω E1 cable (B) that shown in
, supports
4 E1 links at most.
F
IGURE
31 120Ω E1 C
ABLE
(A) A
PPEARANCE
Confidential and Proprietary Information of ZTE CORPORATION
41