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Power Requirements for AP21

The AP21 requires at least 802.3af power. To provide full wireless functionality, the AP21 requests 12.9 W. You can use any of the following options to power on an AP21:

  • Power over Ethernet (PoE) from an Ethernet switch.

    We recommend that you use an Ethernet cable with a maximum length of 100 m to connect the 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.

  • PoE injector

  • 12 VDC power supply