I had even shorter distance ~45m and only two devices tried to power on with powerbox: groove and sxt lite. No success to power them with 1m patch cable, together or separate. Succeeded with powerbox only like regular poe device. What a shame.
After that i had to install power line to power on devices via powerbox dc plug.
Sure, via POE, that’s the purpose of this device? isn’t?. Of course was used original powerbox supply and even was checked other supply.
Voltage was indicated in powerbox ~23V without load. Even with one powered device powebox not started. Cable - 24awg (0,5 mm dia) outdoor cable. This cable was used to power on groove before.
I had no possibility to measure voltage at the line end, because i did not expected such surprise,and i did not had multimeter on site.
It’s quite clear, that the problem is voltage drop during bootup, thus mikrotik did bad job when programming poe-out without delay, when starting powerbox.
i solve this scenario by power line adapter
added power line adapter in source and destination by electric cable and connect lan cable to power box to separate vlans and connect to radio
im not good English
please type this in correct format