Table 2-1 Ports and indicators on the RRU panels
Item Label Description
(1) Ports at the bottom ANT0-ANT3 TX/RX ports. ANT0 port supports RET signal
transmission.
RET/EXT_ALM Communication port for the RET antenna or
port for alarm reporting, supporting RET
signal transmission
RGPS RGPS port, which is optional.
(2) Ports in the cabling
cavity
CPRI0/IR0 Optical port
CPRI1/IR1
RTN(+) Power supply socket
NEG(-)
(3) Indicators RUN For details, see 2.3 RRU Indicators.
ALM
ACT
VSWR
CPRI0/IR0
CPRI1/IR1
NOTE
If only two RF ports are required, ANT0 and ANT1 are used by default.
The RET ports to be used are determined by the software configuration.
2.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
For the specific positions of RRU indicators, see 2.2 RRU Ports.
Table 2-2 describes RRU indicators.
Table 2-2 Indicators on the RRU
Label
Color Status Description
RUN Green Steady on There is power supply, but the module
is faulty.
Steady off There is no power supply, or the
module is faulty.
DBS3900
RRU3252/RRU3256 Hardware Description 2 RRU Introduction
Issue Draft A (2012-11-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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