Huawei BBU3900 Hardware Description page 6

About This Document
UEIU in the BBU or the RRU collects monitoring signals from boards and components to
achieve environment monitoring of the DBS3900.
3 BBU3900 Equipment
This describes the BBU3900 equipment. It is a baseband unit that implements communication
between the NodeB and the RNC.
4 BBU3900 Cables
This describes the BBU3900 cables. The cables are the PGND cable, power cable,E1 cable, E1
surge protection transfer cable, FE cable, FE surge protection transfer cable, Iub optical cable,
monitoring signal cable between the APMI and the BBU, CPRI optical cable, alarm cable,
EMUA signal cable, monitoring signal cable between the CMUA and the BBU, and GPS clock
signal cable.
5 Auxiliary Devices of the BBU3900
This describes the auxiliary devices of the BBU3900. The devices consist of the SLPU, OMB
Cabinet and WGRU.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
General Conventions
The general conventions that may be found in this document are defined as follows.
Convention
Times New Roman
iv
Description
Indicates a hazard with a high level of risk, which if not
avoided,will result in death or serious injury.
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation, which if not
avoided,could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.
Description
Normal paragraphs are in Times New Roman.
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BBU3900
Hardware Description
Issue 11 (2010-11-10)