Huawei CX600-8 Hardware Description page 110

HUAWEI CX600-8/16/X3/X8/X16 Metro Service Platform
Hardware Description
4.3.4 Air Filter
The CX600-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 4-14 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.
4.3.5 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.
principles.
Table 4-10 Fan Speed Adjustment Principles
Ambient
Temperat
ure
-5°C-+27°
C (23°F -
80.6°F)
27°C-50°C
(80.6°F -
122°F)
Over 45°C
(113°F)
4.4 Switching Network
This section describes the functions of the switch fabric unit.
Issue 03 (2013-11-30)
NOTE
Rotational Speed
Low speed (50%
rotational speed)
Linear variation
High speed (100%
rotational speed)
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Figure 4-14 shows the appearance of an air filter.
Noise and Dissipation Standards
When fans rotate at a constantly low speed, the noises
meet the NEBS standard and the fans meet heat
dissipation requirements of a fully configured system.
The fan speed is adjusted smoothly in linear mode,
without a sharp increase in noises.
Fans rotate at high speed to meet heat dissipation
requirements.
4 CX600-X8
Table 4-10 lists general
91