Controlling the Temperature

Extreme Networks equipment generates a significant amount of heat. It is essential that you provide a temperature-controlled environment for both performance and safety.

Install the equipment only in a temperature- and humidity-controlled indoor area that is free of airborne materials that can conduct electricity. Too much humidity can cause a fire. Too little humidity can produce electrical shock and fire.

Observe these additional thermal recommendations for the location where you plan to install your equipment:

• Ensure that the ventilation in the wiring closet is adequate to maintain a temperature below 40°C (104°F).
• Install a reliable air conditioning and ventilation system.
• Keep the ventilation in the wiring closet running during non-business hours; otherwise, the equipment can overheat.
• Maintain a storage temperature between -40°C (-40°F) and 70°C (158°F).

Thermal Shutdown and Restart Behavior summarizes the behavior of ExtremeSwitching switches when they experience high operating temperatures.

Ambient Temperature Range for Switches lists the ambient temperature range for ExtremeSwitching switches. As with all electrical equipment, however, Extreme Networks product lifetimes degrade with increased temperature. Ideally, therefore, temperatures should be kept at or below 25°C (77°F).

Safeguards are built into all Extreme Networks switches and power supply units to minimize the risk of fire.

Thermal Shutdown and Restart Behavior

Switch Model(s)	Behavior
All models except those listed below	When internal system temperatures exceed the thermal shutdown temperature limit (typically about 20°C higher than normal system operating temperatures), the system‘s power supplies are turned off and the switch shuts down. The system remains in the OFF state until the system has sufficient time to cool and the internal thermal sensor measures a temperature lower than the maximum specified ambient temperature, at which time the system restarts automatically. Alternately, you can restart the system immediately by removing and then restoring all line power to the system.
X460-G2 (all models)	When internal system temperatures exceed the thermal shutdown temperature limit (typically about 20°C higher than normal system operating temperatures), the system‘s power supplies are turned off and the switch shuts down. The switch does not restart automatically, even after cooling. It remains in the OFF state until you remove and then restore all line power to the system.

Ambient Temperature Range for Switches

Switch Series	Ambient Operating Temperature Range
X440-G2	0°C (32°F) to 50°C (122°F) Note: The maximum temperature is 60°C (140°F) for the following models: X440-G2-12t8fx-GE4, X440-G2-24fx-GE4, X440-G2-24t-GE4.
X450-G2	0°C (32°F) to 50°C (122°F)
X460-G2	0°C (32°F) to 50°C (122°F)
X590	0°C (32°F) to 45°C (113°F)
X620	0°C (32°F) to 50°C (122°F)
X670-G2	0°C (32°F) to 45°C (113°F)
X690	0°C (32°F) to 45°C (113°F)
X770	0°C (32°F) to 45°C (113°F)
X870	0°C (32°F) to 45°C (113°F)