That has been true, but it seems like the cell world has been moving to 48V lately. Examples: Alvarion carrier WiMax (2.5Ghz), macro and micro uses 48V (maybe you can get it in 24V, the stuff I've seen has all been 48V) With packet optical, if you put a Cyan box in that uses 24V you need separate linecard spares as they aren't compatible with the 48V stuff in core. More microwave backhauls are at 48V. Newer all-outdoor ones are using POE+ / 802.3at which is 48V. Cisco ASR901S pole-mount routers output POE+ so you have one outdoor box to take your fiber and go to microwave to other sites. Most Ethernet switches are AC or -48DC.
On Sat, Apr 6, 2013 at 2:01 PM, Fred Goldstein <fgoldst...@ionary.com>wrote: > On 4/6/2013 2:20 PM, Mike Hammett wrote: > > They should have always been 48v. I think the only reason they > > weren't always 48v was because the RB5xx boards had problems > > producing noise at 48v. > > The commercial wireless world (cell sites) is all 24 volt. The wireline > world is 48 volt. So I can see why they would use 24 volts, but 48 is > usually only for central office buildings, where there is no radio gear > except, perhaps, some old-fashioned fixed microwave. A handful of > competitive players are doing microwave collocation in COs, but given > the cost, a power converter would be the least of their worries. > > > > > > > ----- Mike Hammett Intelligent Computing Solutions > > http://www.ics-il.com > > > > ----- Original Message ----- From: "Robert" > > <nos...@avantwireless.com> To: "paolo difrancesco" > > <paolo.difrance...@level7.it>, "WISPA General List" > > <wireless@wispa.org> Sent: Saturday, April 6, 2013 11:18:33 AM > > Subject: Re: [WISPA] Ubiquiti Rocket Titanium > > > > Exactly... UBNT looks more and more like a company trying less and > > less to stay out in front of the competition but locking in their > > customers... Very apple-ish... hmmmm Robert was at apple... > > > > > > On 04/06/2013 09:11 AM, Paolo Di Francesco wrote: > >> Hi Josh > >> > >> I did not notice the voltage change, but it looks like more a > >> business strategy (their switch does 24V and 48V) to lockout other > >> vendors than a real technical need > >> > >> Should I reimplement again a new battery system at 48V for the > >> site? Hum.... > >> > >> Thank you > >> > >> > >>> Ya...better. Different voltage though. > >>> > >>> Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne > >>> St Suite 1337 Troy, OH 45373 > >>> > >>> On Apr 6, 2013 11:04 AM, "Paolo Di Francesco" > >>> <paolo.difrance...@level7.it > >>> <mailto:paolo.difrance...@level7.it>> wrote: > >>> > >>> Hi all > >>> > >>> I was wondering if the Rockets-Titanium are stable, or if > >>> somebody is using them with success. Not sure if they perform > >>> better than the "plastic" ubiquiti > >>> > >>> Still missing the multiple SSID and IPv6 support, who knows if > >>> Ubiquiti will implement that sooner or later... > >>> > >>> Let me know your feedback and if the extra cost worths the > >>> improvements :) > >>> > >>> Thank you > >>> > >>> -- > >>> > >>> > >>> Ing. Paolo Di Francesco > >>> > >>> Level7 s.r.l. unipersonale > >>> > >>> Sede operativa: Largo Montalto, 5 - 90144 Palermo > >>> > >>> C.F. e P.IVA 05940050825 Fax : +39-091-8772072 > >>> <tel:%2B39-091-8772072> assistenza: (+39) 091-8776432 > >>> <tel:%28%2B39%29%20091-8776432> web: http://www.level7.it > >>> > >>> > >>> > >>> _______________________________________________ Wireless mailing > >>> list Wireless@wispa.org <mailto:Wireless@wispa.org> > >>> http://lists.wispa.org/mailman/listinfo/wireless > >>> > >> > >> > > _______________________________________________ Wireless mailing > > list Wireless@wispa.org > > http://lists.wispa.org/mailman/listinfo/wireless > > _______________________________________________ Wireless mailing > > list Wireless@wispa.org > > http://lists.wispa.org/mailman/listinfo/wireless > > > > > -- > Fred R. Goldstein fred "at" interisle.net > Interisle Consulting Group > +1 617 795 2701 > > -- > Fred R. Goldstein fred "at" interisle.net > Interisle Consulting Group > +1 617 795 2701 > _______________________________________________ > Wireless mailing list > Wireless@wispa.org > http://lists.wispa.org/mailman/listinfo/wireless >
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