The challenge: an existing installation where an EP-R6 is powered by POE and is subsequently powering 3 AirMax radios also by POE.
Total power provided to the EP-R6: about 30 watts (30 watts at POE less whatever is lost in the 100 foot cable run).
Total power being used by the EP-R6 and all its underlings: about 30 watts.
This situation was causing the EP-R6 to randomly reboot - presumably due to sometimes needing more power than it had available to it and/or temperature changes affecting loss in the cables.
The solution: an AirFiber POE with the same amperage output but double the voltage. That means double the watts available at the other end of the cable - 60+ watts instead of 30 watts.
But now we have another problem - the EP-R6 requires 24 volts, not the 50 volts now being provided. So the first order of business is a gigabit POE splitter so the data can be separated from the power.
[EDIT]: Previously I posted this story using a POE splitter that only handled power on 2 pairs. Since the AirFiber POE uses 4-pair POE we need a matching 4-pair POE splitter to take full advantage of the higher voltage. This one from Tycon should do the trick:
The AirFiber POE uses 3,6,7,8 for the negative and 1,2,4,5 for the positive, while this Tycon splitter uses 1,2,7,8 for negative and 3,4,5,6 for the positive. To correct this difference simply use a crossover cable between the POE supply output and the POE splitter input.
Now that we have a way to separate the power, we need a voltage reducer to take it back down to the 24 volts that the EP-R6 needs. I found this converter that takes 28-60 volts in and coverts it down to 24 volts out at 3 amps maximum, which is conveniently the exact same paramaters of the EP-R6 (24 volts, 3 amps):
Any down-converter with the appropriate specs should work here. This particular converter can be found here:
Now it's time to give it a little test drive using the blue crossover cable, and bingo - 24.3 volts:
And now to power the EP-R6:
It works! The EP-R6 is now powered with up to ~60 watts using a POE supply and Ethernet cable to extend power out to the EP-R6. This is enough to power an AirMax radio on all 5 of the POE outputs on the EP-R6.