Table 4-26
LED on the FAN panel
Label
Color
State
Meaning
STATE
Green
On for 0.125s and off
for 0.125s
The module is not
registered, and no
alarm is reported.
On for 1s and off for
1s
The module is
functional.
Red
Off
No alarm is
generated.
On for 1s and off for
1s
The unit is reporting
alarms.
UPEU
The Universal Power and Environment Interface Unit (UPEU) for the BBU3900 converts -48
V DC or +24 V DC power into +12 V DC.
Panels
The UPEU is classified into three types: Universal Power and Environment Interface Unit Type
A (UPEUa), Universal Power and Environment Interface Unit Type B (UPEUb), and Universal
Power and Environment Interface Unit Type C (UPEUc). The UPEUa and UPEUc convert -48
V DC power into +12 V DC, and the UPEUb co24 V DC power into +12 V DC.
show the panels of the UPEUa, UPEUb, and UPEUc
respectively.
Figure 4-17
UPEUa panel
(1) BBU power switch
BTS3900
Hardware Description
4 BTS3900 Components
Issue 04 (2011-02-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-25