Noise and Dissipation StandardsSR
-5°C -
+27°C
(23°F -
80.6°F)
Low speed (50%
rotational speed)
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 -
45°C
(80.6°F -
113°F)
The fan speed is adjusted smoothly in linear mode,
without a sharp increase in noises.
High speed (100%
rotational speed)
Fans rotate at high speed to meet heat dissipation
requirements.
1.9.1.3 Fan Module
The fan module is located in the rear of the chassis, used for ventilation and heat dissipation
of boards. The fan module consists of a fan tray, two fans, and a fan control board (FCB). If a
single fan fails, the system can still work for a short period of time at an ambient temperature
of 40°C.
Overview
Table 1-97 Fan attributes
Table 1-98 Mapping products and versions
Earliest Software Version
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