Its the same behavior on changing from PoE to power adapter on MG21 series as well.

The new MG52 series of Cellular Gateways support PoE on both LAN ports.From our documentation - "The port labeled “PoE” (Port 1 & 2) accepts 802.3at power."Meraki documentation - MG52E installation guide

MX85, MX95, and MX105 models have PoE+ capable WAN links that would help you connect your MG directly --- without a PoE injector.Thanks,Arun Paul

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