Do I really want 1 Ubnt part point of failure for every single BH and AP though...
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Mon, Jun 25, 2018 at 4:44 PM, Forrest Christian (List Account) < li...@packetflux.com> wrote: > Seems like I missed a big chunk of the middle of this thread somehow. > > A few points, not necessarily relevant to the immediately below comment: > > 1) There are lots of 48VDC to 24VDC PoE adapters already on the market. > Not the least of which is the UBNT INS-3AF-I-AG, which is 48V/802.3af in > 24VDC out. At $22.95 it is cheap enough that I'd personally have to have > to think twice about designing a product which did exactly this, unless it > was in a different, more wisp-friendly form factor. > > In addition to the above, there are several single PoE injectors on the > market which take a hardwired 48V in, and spit 24V out. Or vice versa. > > 2) Yes, power supplies seem to be more expensive at 48VDC. I'm 100% sure > that this is because there are significantly fewer options for power supply > controller IC's at >30V or so. Plus capacitors get a lot more expensive, > etc.. > > 3) In another thread I mentioned that the new control boards on the > rackinjector would accept either voltage (+ or - 48VDC). The existing > injection boards just pass through voltage so +-48VDC in, +-48VDC out. > However, the underlying technology I'm using to make the control board > happy with -48VDC can (according to the datasheet) also handle 24V or 48V > out at up to about 12W. I'm in the processes of verifying that this will > work to power a typical 802.11 based radio. I'm about 85% certain this > will turn into initially a board for the rackinjector which can take any > voltage between -60V and +60V (except -10 to +10) and put out 24V or 48V on > a given port, at up to 12W per port. Other variations would come shortly > thereafter. Assuming a successful implementation, it is still up in the > air about how you will select your output voltage - it might be buy a board > for your voltage, or it might be modular and/or jumpers. Cost will pay a > big part of this decision. > > > > On Mon, Jun 25, 2018 at 8:04 AM, Adam Moffett <dmmoff...@gmail.com> wrote: > >> What about a magical correct power adapter? Anything in / anything out, >> and it knows what to do automatically. >> Needs a bottle opener on it too. >> -Adam >> >> >> ------ Original Message ------ >> From: "Chuck McCown" <ch...@wbmfg.com> >> To: "AFMUG" <af@af.afmug.com> >> Sent: 6/24/2018 9:41:10 PM >> Subject: Re: [AFMUG] ePMP voltages again - specifically 2ghz >> >> Not a problem, not cheap. >>> >>> What kind of form factor? >>> >>> What kind of in and out voltages? Certainly doable. >>> I think Forrest has something similar in his latest stuff. >>> >>> Would you want it to pull it off of the Ethernet cable and then put it >>> back on the Ethernet cable at a different voltage? >>> >>> >>> -----Original Message----- From: Robert Andrews >>> Sent: Sunday, June 24, 2018 4:50 PM >>> To: AFMUG >>> Subject: Re: [AFMUG] ePMP voltages again - specifically 2ghz >>> >>> oh. or any 48 and makes it +48.... i.e pass through if already ok... >>> >>> On 06/24/2018 02:45 PM, Gino A. Villarini wrote: >>> >>>> How about a dc-dc poe/SS that takes –48 and converts to +48, 24v etc ? >>>> >>>> From: AF <af-boun...@af.afmug.com <mailto:af-boun...@af.afmug.com>> on >>>> behalf of Chuck McCown <ch...@wbmfg.com <mailto:ch...@wbmfg.com>> >>>> Date: Thursday, June 21, 2018 at 12:53 PM >>>> To: Mathew Howard <mhoward...@gmail.com <mailto:mhoward...@gmail.com>>, >>>> David Milholen <dmilho...@wletc.com <mailto:dmilho...@wletc.com>> >>>> Cc: AFMUG <af@af.afmug.com <mailto:af@af.afmug.com>> >>>> Subject: Re: [AFMUG] ePMP voltages again - specifically 2ghz >>>> >>>> *//* >>>> >>>> */Gino A. Villarini/* >>>> >>>> President >>>> Metro Office Park #18 Suite 304 Guaynabo, Puerto Rico 00968 >>>> >>>> Me too... >>>> So, what appetite is there for an inline POE regulator that would >>>> convert 48 to 24? >>>> *From:* Mathew Howard >>>> *Sent:* Thursday, June 21, 2018 10:50 AM >>>> *To:* Dave >>>> *Cc:* AFMUG >>>> *Subject:* Re: [AFMUG] ePMP voltages again - specifically 2ghz >>>> ugh... I keep forgetting to use reply-to-all... >>>> Not every single UBNT radio... all the airfibers will happily take 48v. >>>> Mikrotik is finally starting to make most of the new stuff handle 48v >>>> (including the PowerBox Pro), but yeah. UBNT is the reason I still have to >>>> use 24v on most of our towers... they make a converter you can stick on in >>>> line with the radios, but that's kind of a pain if you have more than one >>>> or two, and it's an extra part to fail. >>>> On Thu, Jun 21, 2018 at 11:46 AM, Dave <dmilho...@wletc.com> wrote: >>>> >>>> They make dental floss for that :) >>>> >>>> >>>> On 06/21/2018 11:39 AM, Josh Luthman wrote: >>>> >>>>> Except for every single Ubnt device and a majority of Mikrotiks.... >>>>> Josh Luthman >>>>> Office: 937-552-2340 >>>>> Direct: 937-552-2343 >>>>> 1100 Wayne St >>>>> Suite 1337 >>>>> Troy, OH 45373 >>>>> On Thu, Jun 21, 2018 at 12:39 PM, Josh Baird <joshba...@gmail.com> >>>>> wrote: >>>>> >>>>> I promise life will be easier if you just use 48V. :) >>>>> On Thu, Jun 21, 2018 at 12:35 PM, Josh Luthman >>>>> <j...@imaginenetworksllc.com> wrote: >>>>> >>>>> I'm trying to use a Powerbox Pro to power up two epmp >>>>> APs. The 5 GHz is just fine but the 2 GHz is saying >>>>> current too low. Both ports are getting 23 volts and the >>>>> cables are <10 feet (from the Powerbox Pro). >>>>> Does anyone know if the 2ghz requires more voltage possibly? >>>>> Spec sheet does say 23 volts min but it's weird one powers >>>>> (5 ghz) and the other doesn't. >>>>> Josh Luthman >>>>> Office: 937-552-2340 >>>>> Direct: 937-552-2343 >>>>> 1100 Wayne St >>>>> >>>>> <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+O >>>>> H+45373&entry=gmail&source=g> >>>>> Suite 1337 >>>>> >>>>> <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+O >>>>> H+45373&entry=gmail&source=g> >>>>> Troy, OH 45373 >>>>> >>>>> <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy,+O >>>>> H+45373&entry=gmail&source=g> >>>>> -- AF mailing list >>>>> AF@af.afmug.com >>>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>>> <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> >>>>> >>>>> >>>>> >>>>> >>>> -- >>>> -- AF mailing list >>>> AF@af.afmug.com >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> <http://af.afmug.com/mailman/listinfo/af_af.afmug.com> >>>> >>>> ------------------------------------------------------------ >>>> ------------ >>>> -- AF mailing list >>>> AF@af.afmug.com <mailto:AF@af.afmug.com> >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>>> >>>> >>> -- AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> -- AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> >> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > > > > -- > *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* > Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 > forre...@imach.com | http://www.packetflux.com > <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> > <http://twitter.com/@packetflux> > > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > >
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