E1/T1 Surge Protection Transfer Cable; Table 4-6 Pin Assignment For The Wires Of The 120-Ohm E1 Twisted Pair Cable - Huawei BBU3900 Hardware Description

4 BBU3900 Cables

Table 4-6 Pin assignment for the wires of the 120-ohm E1 twisted pair cable

Pins of the DB26
Male Connector
X.1
X.2
X.3
X.4
X.5
X.6
X.7
X.8
X.19
X.20
X.21
X.22
X.23
X.24
X.25
X.26

4.6 E1/T1 Surge Protection Transfer Cable

This section describes the E1/T1 surge protection transfer cable connecting the UELP to the
transmission board. This cable is optional.
Exterior
The E1/T1 surge protection transfer cable has a DB26 male connector at one end and a DB25
male connector at the other end, as shown in
4-10
Wire Color
Blue
White
Orange
White
Green
White
Brown
White
Gray
White
Blue
Red
Orange
Red
Green
Red
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Wire Type
Twisted pair
Twisted pair
Twisted pair
Twisted pair
Twisted pair
Twisted pair
Twisted pair
Twisted pair
Figure 4-7.
BBU3900
Hardware Description
Cable Labels
RX1+
RX1-
RX2+
RX2-
RX3+
RX3-
RX4+
RX4-
TX1+
TX1-
TX2+
TX2-
TX3+
TX3-
TX4+
TX4-
Issue 11 (2010-11-10)