LED
Color
Status
Description
Blinking (on for
0.125s and off for
0.125s)
Data is being loaded to the board, or the board
is not started.
ALM
Red
On
Alarms are generated, and the module needs
to be replaced.
Blinking (on for
1s and off for 1s)
Alarms are reported. The alarms may be
caused by the faults of other related boards
or ports. Therefore, whether the module
needs to be replaced cannot be decided.
Off
No alarm is generated.
ACT
Green
On
The board works properly with the TX
channel enabled.
Blinking (on for
1s and off for 1s)
The board works properly with the TX
channel disabled.
VSWR
Red
Off
No VSWR alarm is generated.
On
A VSWR alarm is generated on the
ANT_TX/RXB port.
Blinking (on for
1s and off for 1s)
A VSWR alarm is generated on the
ANT_TX/RXA port.
Blinking (on for
0.125s and off for
0.125s)
A VSWR-related alarm is generated on both
the ANT_TX/RXA port and the ANT_TX/
RXB port.
CPRI0
Red/
Green
Steady green
The CPRI link is functional.
Steady red
The optical module fails to receive signals.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock.
Off
The SFP module is not in position or the
optical module is powered off.
CPRI1
Red/
Green
Steady green
The CPRI link is functional.
Steady red
The optical module fails to receive signals.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock.
Off
The SFP module is not in position or the
optical module is powered off.
RRU3908 V2
Hardware Description
2 Introduction to the RRU3908
Issue 02 (2010-10-25)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2-7
