That wouldn’t protect against a customer driving to his other house and bringing a different type of POE and plugging it in. I think that falls under the category of “it’s impossible to make anything foolproof because fools are so ingenious”.
The answer probably would be to be consistent across all CPE, e.g. use ePMP instead of Nanostations, unfortunately that was not an option when we first started doing it this way. For the manufacturers, I believe there are a few products that have a diode bridge on the power input so they are polarity agnostic. Again, that doesn’t help already deployed links. Scarier yet, we used to have some WiMAX CPEs that used 48V POE. Cambium also has 450i SMs that take a 48V CPE, what the %$#@ was somebody thinking? That’s a disaster waiting to happen. Maybe given the price they don’t expect anyone to actually buy them. From: AF <[email protected]> On Behalf Of Carl Peterson Sent: Tuesday, December 3, 2019 8:18 AM To: AnimalFarm Microwave Users Group <[email protected]> Subject: Re: [AFMUG] will reverse POE fry an M5 Nanostation? Would it be possible to add diodes in-line? i.e with a dongle On Tue, Dec 3, 2019 at 8:14 AM Nate Burke <[email protected] <mailto:[email protected]> > wrote: If it's a current limiting supply like any of the modern POE Injectors, then I don't think there's usually a problem, if it's a direct connection like a battery, then yes, it releases the magic smoke. But the Cambium radios would do that too if you reverse the polarity with a battery pack, years ago we had an installer who never paid attention to the polarity, he fried several FSK Radios. On 12/3/2019 6:52 AM, Jay Weekley wrote: > It usually fries them when we use our battery packs and get the > polarity wrong. > > Ken Hohhof wrote: >> >> I have a customer who plugged an M series Nanostation Loco into a >> reverse polarity POE intended for a Cambium SM. (long story) >> >> Anybody know if this means the Nanostation is fried? I’m guessing yes. >> >> >> > -- AF mailing list [email protected] <mailto:[email protected]> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- Carl Peterson PORT NETWORKS 401 E Pratt St, Ste 2553 Baltimore, MD 21202 (410) 637-3707
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