HUAWEI NetEngine40E Universal ServiceRouter
Hardware Description
2 NE40E-X16 Chassis Overview
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
perforated. Air filters are fixed to the chassis by fasteners to facilitate filter removal and
replacement.Figure 2-13 shows the appearance of an air filter.
Figure 2-13 An air filter
The air channel in the SFU slot area is located on the left of the chassis. The air filter uses
front access. The depth of the air filter is the same as that of an SFU and the height of the air
filter is four times the height of an SFU as shown in Figure 2-14.
Figure 2-14 An air filter in the SFU slot area
Placing a black sponge air filter at the air intake vent helps to prevent dust from entering the
system. It is recommended that air filters be removed and cleaned at least once every three
months.
2.3.5 Fan Speed Adjustment
This section describes the fan speed adjustment.
When the system is fully configured, temperatures reported by the temperature sensors on the
LPUs, SFUs, and MPUs serve as the basis for fan speed adjustment. General principles are
listed below:
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