Huawei DBS3900 Hardware Description page 20

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