ZyXEL ES-3124PWR User Guide - Page 69
General Setup
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Chapter 7 Basic Setting Table 9 Basic Setting > System Info (continued) LABEL DESCRIPTION Temperature Unit The Switch has temperature sensors that are capable of detecting and reporting if the temperature rises above the threshold. You may choose the temperature unit (Centigrade or Fahrenheit) in this field. Temperature MAC, CPU and PHY refer to the location of the temperature sensors on the Switch's printed circuit board. ENV refers to the environmental or ambient temperature within the Switch (PWR models only). Current This shows the current temperature at this sensor. MAX This field displays the maximum temperature measured at this sensor. MIN This field displays the minimum temperature measured at this sensor. Threshold This field displays the upper temperature limit at this sensor. Status This field displays Normal for temperatures below the threshold and Error for those above. FAN Speed (RPM) A properly functioning fan is an essential component (along with a sufficiently ventilated, cool operating environment) in order for the device to stay within the temperature threshold. Each fan has a sensor that is capable of detecting and reporting if the fan speed falls below the threshold shown. Current This field displays this fan's current speed in Revolutions Per Minute (RPM). MAX This field displays this fan's maximum speed measured in Revolutions Per Minute (RPM). MIN This field displays this fan's minimum speed measured in Revolutions Per Minute (RPM). "