As a previous poster mentioned, this feature on Nanostation M5 and M2 is called POE passthrough, and it has a checkbox to enable it on the AirOS web UI.
This will let you power a 2nd 24V POE device from the "Secondary" port of the Nanostation, using a single POE supply. I use the POE-24-1 (aka 24V 1amp) supply from UBNT when powering 2 devices like this. I've read other folks on the UBNT customer forum try powering more than 2 units from a single power supply, e.g. 2 Nanostations and then a 3rd device daisy-chained together, tho I believe UBNT doesn't support this. HOWEVER, do please note the POE passthrough feature on the Nanostation M's has been consistently problematic. When I first tried to have an NSM5 power a 2nd access point 18months ago, I found that my NSM5's would commonly burn out a FET inside after ~1week operation, causing the POE enable switch to henceforth become stuck on regardless of firmware setting. Sometimes this burn out event would put the NSM5 in a reboot loop until I reflashed it. More recently, it seems UBNT might have released a batch of NSM5 that actually brick themselves when you enable the POE passthrough, requiring an RMA. I had just this happen to an NSM5 I bought in April. https://forum.ubnt.com/showthread.php?p=270549 The suggested work-around, as mentioned above, is to swap the Main and Secondary ports on the Nanostation if you want to power a 2nd device, and not use firmware POE passthrough enable at all. On Tue, May 29, 2012 at 4:49 PM, Greg Ihnen <[email protected]> wrote: > A good thing to know about the UBNT gear is if for some reason supplying > PoE via the "main" port stops working, you can supply PoE via the > "secondary" port whether or not the PoE passthrough option is enabled. > > Greg > > -- > Ben West > http://gowasabi.net > [email protected] > > >
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