Table 4-1
LEDs on the GTMU
LED
Color
Status
Description
RUN
Green
ON
The board is faulty.
OFF
There is no power supply, or the
board is faulty.
ON for 1s and OFF
for 1s
The board is running properly.
ON for 2s and OFF
for 2s
The board is being tested.
ON for 0.125s and
OFF for 0.125s
Software is being loaded to the
board.
ALM
Red
ON
An alarm is generated,
indicating a running fault.
OFF
The board is running properly.
ACT
Green
ON
The board is in the active state.
OFF
The board is in the standby state.
Besides the preceding three LEDs, there are LEDs indicating the connection status of the FE
optical port, FE electrical port, CPRI port and commissioning port. Each of the LEDs is
positioned near the relevant port without any label on the panel of the board.
describes
the LEDs and their status.
Table 4-2
LEDs and their status
LED
Color
Status
Description
LIU0 to LIU3
Green
ON
The link is in the idle
state.
ON for 0.125s and
OFF for 0.125s
An E1/T1 remote
alarm is generated.
OFF
The link is
functional.
CPRI0 to CPRI5
Green
ON
The CPRI link is
functional.
Red
ON
The optical module
fails to receive
signals.
ETH
Green (LINK LED
on the left)
ON
The connection is set
up successfully.
4 BTS3900 Components
BTS3900
Hardware Description
4-6
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 04 (2011-02-15)