What is the operating temperature of boards and what are the upper and lower temperature thresholds

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You can use the display temperature command to view the current card temperature and temperature alarm thresholds. In the command output, the Temperature.(C) field shows the current card temperature, the Upper field shows the upper temperature alarm threshold , and the Lower field shows the lower temperature alarm threshold.

In a poorly ventilated environment, temperature alarms may be generated frequently because the card temperature is high and the upper temperature alarm threshold is small. To avoid this problem, clean the air filter of the device or increase the upper temperature alarm threshold.

NOTE:
The temperature thresholds are preset and you do not need to change them. If you have special requirements on the temperature, contact Huawei engineers.

Other related questions:
Redundant range of an OTU board on an OTN device
The suggested redundant range is 10 km to 30 km.

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