Using a power supply (PSU):
Ensure the the power supply being used is within the voltage range as marked on your ENTTEC device.
A suitable power supply is included in the box with all non-din products.
Note: Never plug in a power supply that looks damaged.
If your device uses PoE please make sure that a PoE is enabled on the switch / POE injector, and that the cabling is correct. All ENTTEC products that use PoE are designed for use with the Active IEEE802.3AF PoE standard and are not compatible with Passive PoE.