Huawei NetEngine40E Hardware Description

HUAWEI NetEngine40E Universal ServiceRouter
Hardware Description
3 NE40E-X8 Chassis Overview
Issue 01 (2012-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
53
3.3.4 Air Filter
The NE40E-X8 draws in air from the front top and exhausts air from the rear top. There is a 3
U space in the upper part of the chassis and an air filter on the front of the chassis. To
maximize air intake, the filter is fully perforated. The air filter is fixed to the chassis by a
fastener to facilitate filter removal and replacement. Figure 3-13 shows the appearance of an
air filter.
Figure 3-13 An air filter
Placing a black sponge air filter at the air intake vent helps to prevent dust from entering the system. It is
recommended that the air filter be removed and cleaned once every three months.
3.3.5 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:
Ambient
Temperat
ure
Rotational Speed
Noise and Dissipation Standards
-5°C -
+27°C
( 23°F -
80.6°F )
Low speed
(2200/min)
When fans rotate at a constantly low speed, the
noises meet the ETSI standard and the fans meet
heat dissipation requirements of a fully configured
system.
27°C -
50°C
(80.6°F -
122°F)
Linear variation
The fan speed is adjusted smoothly in linear mode,
without a sharp increase in noises.
Over 50°C
( 122°F )
High speed
(5900/min)
Fans rotate at high speed to meet heat dissipation
requirements.

Huawei NetEngine40E Specifications

General

Brand	Huawei
Model	NetEngine40E
Category	Network Router
Language	English