Maybe LLDP has something to do with it? You could try turning LLDP off on the phone (if that's an option).

How does the phone behave when the dock is plugged in? Does it immediately power off completely?

I once saw a case with Aastra phones back in the day where the cables were reversed - POE switch was plugged into the PC port and the PC was plugged into the network port. Surprisingly, the phone powered up but needless to say there was some strange behavior!

Last edited by Toner; 06/29/22 02:22 PM.

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