Yeah, you pay more if you start getting into real telecom-type -48v stuff, but there are 48v equivalents of pretty much all the 24v stuff we've been using, and there's really not a significant price difference (a Meanwell AD-155C vs 155B is a good example). It also has the advantage of making it easy to move to the good stuff later on.
On Thu, Jun 21, 2018 at 3:12 PM, Adam Moffett <dmmoff...@gmail.com> wrote: > I think there's some truth to that. There are real reasons for phone > lines to run at -48V, and they've been doing so for a long time. So the > logical assumption from a manufacturer would be that a -48v device is for a > phone company. A phone company needs reliability and probably has the > money to pay for it, so the price has two reasons to go up: once to pay for > the reliability, and again because they know the buyer has big pockets. > > The reason for people who aren't phone companies to run -48v is that they > want to access the ecosystem of power products that was made for phone > companies. And yeah, I think you do pay more to play in the -48v sandbox. > > -Adam > > > > ------ Original Message ------ > From: "Robert Andrews" <i...@avantwireless.com> > To: af@af.afmug.com > Sent: 6/21/2018 3:55:41 PM > Subject: Re: [AFMUG] ePMP voltages again - specifically 2ghz > > Oh.. the "Real Telecom Players"... vs all those that have provided > internet all over the place that the "Real Telecom Players" thumbed their > noses at... Sorry that concept doesn't mean sweet thoughts to me... But > yes 48V is the sweet spot, I just can't get behind -48v... Even when > science To me it just means a way to jack prices... > > On 06/21/2018 10:59 AM, ch...@wbmfg.com wrote: > > It was always 48 for the real telecom players. > *From:* Josh Luthman > *Sent:* Thursday, June 21, 2018 11:52 AM > *To:* Mathew Howard > *Cc:* Chuck McCown ; AFMUG > *Subject:* Re: [AFMUG] ePMP voltages again - specifically 2ghz > It was 48v > Then it was mostly 24v > Now it's going 48v > Just give it a little bit, it'll go back to 24v. > I'd rather get a power supply doing 26v to fix my problem in 2 minutes > than start changing things to 48v which would blow so much stuff up (epmp > non gps, ubnt M gear, half the 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 1:05 PM, Mathew Howard <mhoward...@gmail.com> > wrote: > > No, there's not really a good reason, it just means you have an > extra part to deal with. > We still use UBNT for our 2.4ghz stuff, but those are the only > radios that won't run off 48v on most of our new sites, so I've done > some that are 48v only and just use those things on the radios that > need them. But if you have more than 1 or 2 things that need 24v, > it's generally more practical to just use a bigger voltage converter > and run multiple radios off it. > On Thu, Jun 21, 2018 at 11:57 AM, <ch...@wbmfg.com> wrote: > > Yep, that was what I was thinking. > So, looks to me like there is no reason not to do 48 volts. > *From:* Mathew Howard > *Sent:* Thursday, June 21, 2018 10:56 AM > *To:* Chuck McCown > *Cc:* Dave ; AFMUG > *Subject:* Re: [AFMUG] ePMP voltages again - specifically 2ghz > You mean like this? > https://www.ubnt.com/accessories/instant-8023af-adapters/ > <https://www.ubnt.com/accessories/instant-8023af-adapters/> > Or do you have something better in mind? > On Thu, Jun 21, 2018 at 11:53 AM, <ch...@wbmfg.com> wrote: > > 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 > <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy, > +OH+%0D%0A++++45373&entry=gmail&source=g> > Suite 1337 > <https://maps.google.com/?q=1100+Wayne+St+Suite+1337+Troy, > +OH+%0D%0A++++45373&entry=gmail&source=g> > Troy, OH 45373 > <https://maps.google.com/?q=1100+%0D%0A++++++Wayne+St+ > Suite+%0D%0A++++++1337+Troy,+OH+45373&entry=gmail&source=g> > 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,+OH+45373&entry=gmail&source=g> > Suite 1337 > <https://maps.google.com/?q= > 1100+Wayne+St+Suite+1337+Troy,+OH+45373&entry=gmail&source=g> > Troy, OH 45373 > <https://maps.google.com/?q= > 1100+Wayne+St+Suite+1337+Troy,+OH+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 > 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 > 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 > >
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