What is the fan speed adjustment policy of AR routers

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AR routers apply the automatic fan speed adjustment policy in which the temperature of key components is monitored. The fan speed increases when the temperature of a sensitive component inside the device is higher than the set value and decreases when the temperature is lower than the set value, ensuring that the temperature of the device is stable and reducing energy costs and noises.

Other related questions:
Adjusting the fan speed of the USG6000
To adjust the fan speed, run the test fan-speed fan-id fan-speed command in the diagnose view. This command involves two parameters. fan-id specifies the fan ID, which can be 0, 1, and 2. 0 and 1 specify the ID of the corresponding fan, and 2 indicates all fans. fan-speed specifies the fan speed, which is an integer ranging from 0 to 4 or 0 to 7, according to the model. A larger value indicates a faster fan speed. The maximum value indicates that the fan runs at the full speed.

Method used to adjust the fan speed
In the NE Explorer, choose Configuration > Fan Attribute. In the right-hand pane, select Adjustable Speed in Fan Speed Mode. Then set Fan Speed Level as required. You are advised to select Auto Speed in Fan Speed Mode.

Whether the speed of fans on an OSN 8800 can be adjusted
An OSN 8800 fan tray assembly can work in either of the following modes:
Auto Speed Mode: The fan tray assemblies automatically regulate fan speeds, depending on the subrack temperature.
Adjustable Speed Mode: You can manually adjust the fan speed.
The speed of the fans on an OSN 8800 is adjusted intelligently. The speed levels include high, medium, and low. The fan speed can be adjusted on the CLI. However, it is not recommended that the configurations be modified. The fan speed is intelligently adjusted by the software.

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