Power-On Options for the AP43
You can use any of the following options to power on an AP43:
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Power over Ethernet Plus (PoE+) from an Ethernet switch
We recommend that you use an Ethernet cable with a maximum length of 100 m to connect the access point (AP) to the switch port.
If you use an Ethernet cable that is longer than 100 m by placing an Ethernet PoE+ extender in the path, the AP might power up, but the Ethernet link does not transmit data across such a long cable. You might see the status LED blink yellow twice. This LED behavior indicates that the AP is unable to receive data from the switch.
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PoE injector
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12 V DC power supply
See PoE Requirements for Juniper Mist APs for the power requirements for an AP43.