Huawei DBS3900 Hardware Description

Exterior
An alarm cable has a DB9 connector at one end and eight cord end terminals at the other end,
as shown in Figure 3-3.
Figure 3-3 RRU alarm cable
(1) DB9 waterproof connector (2) Cord end terminal
Pin Assignment
Table 3-4 describes the pin assignment for the wires of an RRU alarm cable.
Table 3-4 Pin assignment for the wires of an RRU alarm cable
RRU
Alarm
Port
Pin of the
DB9
Connecto
r
Wire
Color
Wire
Type
Cord End
Terminal
Description
Dry
contact
X1.2 White or
blue
Twisted
pair cable
X2 Boolean signal input 0+
X1.4 Blue X3 Boolean signal input 0-
(GND)
X1.7 White or
orange
Twisted
pair cable
X4 Boolean signal input 1+
X1.4 Orange X5 Boolean signal input 1-
(GND)
RS485 X1.6 White or
green
Twisted
pair cable
X6 APM RX-
X1.8 Green X7 APM RX+
X1.5 White or
brown
Twisted
pair cable
X8 APM TX-
X1.3 Brown X9 APM TX+
DBS3900
RRU3252/RRU3256 Hardware Description 3 RRU Cables
Issue Draft A (2012-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
13

Huawei DBS3900 Specifications

General

Brand	Huawei
Model	DBS3900
Category	Accessories
Language	English