DIP
Switch
DIP Status
Description
1
2
3
4
ON
ON
ON
ON
The E1
impedance is
set to 75
ohms.
Other settings of the DIP bits
Disabled
Table 4-12
Settings of SW2
DIP
Switch
DIP Status
Description
1
2
3
4
SW2
OFF
OFF
OFF
OFF
Balanced
Mode
ON
ON
ON
ON
Unbalanced
Mode
Other settings of the DIP bits
Disabled
CAUTION
All the DIP bits of SW2 are set to OFF by default. When four E1 links are faulty, you should
set all the DIP bits of SW2 to ON so that the faults are rectified.
LMPT
The LTE Main Processing & Transmission unit (LMPT) manages the entire eNodeB system in
terms of OM and signaling processing and provides the clock for the BBU3900.
Panel
shows the LMPT.
Figure 4-9
LMPT
TX
SFP 0
RX
TX
SFP 1
RX
USB TST
ETH
FE/GE0
FE/GE1
GPS
RST
RUN
ALM
ACT
LMPT
LMPTb
4 BTS3900 Components
BTS3900
Hardware Description
4-14
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 04 (2011-02-15)