Mdu; Structure And Principle; Table 3-17 Fmu Dip Switch - Huawei BTS3 Series Hardware Description Manual

M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
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Table 3-17

Table 3-17 FMU DIP Switch

DIP
Switch
S1

3.9 MDU

3.9.1 Structure and Principle

Figure 3-23
Issue 01 (2006-11-18)
DIP switch settings of the FMU are finished before delivery. Therefore, do not change the
settings unless necessary.
The FMU is located in a big or a small fan frame. Its DIP switch can be seen after the fan
frame is removed.
lists functions of the DIP switch on the FMU.
DIP Bit Function
4 Indication of
the
configuration of
fan
shows the functional structure of the MDU.
Huawei Technologies Proprietary
Setting Method
If the fan frame where the FMU is located is
configured with a big fan, the four bits of S1 are
set as OFF;
If the fan frame where the FMU is located is
configured with a small fan, check which socket
of FAN1–FAN4 is connected to a fan. If FAN x
is connected to a fan, set Bit x as OFF and other
bits as ON.
3 Board
3-31