Item
Label
Description
ACT
VSWR
CPRI0
CPRI1
(2) Cabling cavity
panel
RTN(+)0
Power supply port
NEG(-)0
RTN(+)1
Cascaded power supply port
NEG(-)1
RX TX CPRI0
Optical/electrical port 0
TX RX CPRI1
Optical/electrical port 1
EXT_ALM
Alarm port
(3) Bottom panel of
the RRU
RX_IN/OUT
RF interconnection port
RET
RET antenna port
ANT_TX/RXA
RF TX/RX port A
ANT_TX/RXB
RF TX/RX port B
(4) Bottom panel of
AC conversion
module
AC-in
AC power supply socket
DC-out
DC power supply socket
2.3 LEDs on the RRU
The six LEDs on the RRU are used to display the running status of the RRU.
For details on the positions of the LEDs on the panel of the RRU, see
describes the LEDs on the RRU.
Table 2-2
LEDs on the RRU
LED
Color
Status
Description
RUN
Green
On
There is power supply, but the board is faulty.
Off
There is no power supply, or the board is
faulty.
Blinking (on for
1s and off for 1s)
The board is running properly.
2 Introduction to the RRU3908
RRU3908 V2
Hardware Description
2-6
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2010-10-25)