Table 4-6
Pin assignment for the wires of the 120-ohm E1 twisted pair cable
Pins of the DB26
Male Connector
Wire Color
Wire Type
Cable Labels
X.1
Blue
Twisted pair
RX1+
X.2
White
RX1-
X.3
Orange
Twisted pair
RX2+
X.4
White
RX2-
X.5
Green
Twisted pair
RX3+
X.6
White
RX3-
X.7
Brown
Twisted pair
RX4+
X.8
White
RX4-
X.19
Gray
Twisted pair
TX1+
X.20
White
TX1-
X.21
Blue
Twisted pair
TX2+
X.22
Red
TX2-
X.23
Orange
Twisted pair
TX3+
X.24
Red
TX3-
X.25
Green
Twisted pair
TX4+
X.26
Red
TX4-
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 BBU3900 Cables
BBU3900
Hardware Description
4-10
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 11 (2010-11-10)
Содержание BBU3900
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