With that said you will likely need a -48v power supply to directly power the radio when mounted to a tower. A +48 will work fine when powering it in the office. But as soon as it's grounded, that will short the power supply out. That is based on my experience. Trango also sells a -48 power supply that is wall mount.
Jon Langeler Michwave Technologies, Inc. > On Dec 7, 2016, at 11:09 AM, Faisal Imtiaz <[email protected]> wrote: > > Hi Mark, > > Just to make sure there this is no confusion in the 'lingo' > > 820C/IP20c is designed to run on -48v DC (telecom power plant), and the radio > gets powder via the Ethernet cable (POE) > > The external POE Injector device is presented as a DC-DC converter.. > The question was is this necessary when using +48vdc power source or just a > matter of changing polarity... > > Regards. > > Faisal Imtiaz > Snappy Internet & Telecom > 7266 SW 48 Street > Miami, FL 33155 > Tel: 305 663 5518 x 232 > > Help-desk: (305)663-5518 Option 2 or Email: [email protected] > > ----- Original Message ----- >> From: "Mark Radabaugh" <[email protected]> >> To: [email protected] >> Sent: Wednesday, December 7, 2016 10:56:06 AM >> Subject: Re: [AFMUG] WTB IP-20C POE > >> The answer to the question: >> >> The 820C runs perfectly fine on -48VDC run directly to the radio. >> >> You do not need the POE adapter unless you really want to run them using POE. >> >> I do not explicitly know if they will run on +48VDC - I believe they will but >> have not actually tried that. >> >> We have quite a few running on -48VDC from Emerson and Eltek rectifier >> shelfs. >> >> Mark >> >> >>> On Dec 7, 2016, at 10:20 AM, [email protected] wrote: >>> >>> yes >>> >>> -----Original Message----- From: Faisal Imtiaz >>> Sent: Tuesday, December 6, 2016 5:13 PM >>> To: [email protected] >>> Subject: Re: [AFMUG] WTB IP-20C POE >>> >>> Hi Chuck... >>> >>> This may be an opportunity to clarify something... >>> >>> According to the specs Ceragon IP-20c is a -48vdc radio. >>> Their POE box/adapter, takes 48v dc or 24v dc and powers the radio. >>> >>> There has not been any clear answer if their Radios will run on regular >>> 48vdc >>> directly ... >>> There have been folks who have 'tested' the cambium 820 version of these >>> plugging directly on the Netonix switches. >>> >>> In my opinion, these are not 'in-expensive' radios that I would risk >>> installing >>> in-correctly. >>> >>> In recommending your injector / surge protector as a solution, my question >>> would >>> be. >>> >>> 1) can we do -48v dc power via these devices ? it is just a matter of making >>> sure the polarity of the dc cable is correct ? or is there more to it. >>> >>> >>> Regards >>> >>> Faisal Imtiaz >>> >>> >>> ----- Original Message ----- >>>> From: "Chuck McCown" <[email protected]> >>>> To: [email protected] >>>> Sent: Tuesday, December 6, 2016 6:08:49 PM >>>> Subject: Re: [AFMUG] WTB IP-20C POE >>> >>>> I am hurt... >>>> >>>> http://www.mccowntech.com/800-gige-poe-outdoor-midspan-poe-injector-ethernet-surge-protector/ >>>> http://www.mccowntech.com/800-gige-poe-apc-rack-mount-surge-protector-power-inserter/ >>>> >>>> Sheesh! >>>> >>>> -----Original Message----- >>>> From: Faisal Imtiaz >>>> Sent: Tuesday, December 06, 2016 3:55 PM >>>> To: [email protected] >>>> Subject: Re: [AFMUG] WTB IP-20C POE >>>> >>>> Some suggestions:- >>>> >>>> for the POE injector... >>>> you can try a Cambium Reseller. >>>> you can possibly by them on Ebay (shipping from Israel) >>>> you can try Surplus Wireless Gear folks too. >>>> >>>> In regards to the Power Supply, that is a straight forward 48v DC power >>>> supply (Brick). >>>> >>>> Regards >>>> >>>> >>>> Faisal Imtiaz >>>> Snappy Internet & Telecom >>>> 7266 SW 48 Street >>>> Miami, FL 33155 >>>> Tel: 305 663 5518 x 232 >>>> >>>> Help-desk: (305)663-5518 Option 2 or Email: [email protected] >>>> >>>> ----- Original Message ----- >>>>> From: "Sterling Jacobson" <[email protected]> >>>>> To: "[email protected]" <[email protected]> >>>>> Sent: Tuesday, December 6, 2016 5:45:19 PM >>>>> Subject: [AFMUG] WTB IP-20C POE >>>> >>>>> Somehow I misplaced my Ceragon POE injector and power supplies during a >>>>> cabinet >>>>> move. >>>>> >>>>> Anyone happen to have a Ceragon IP-20C compatible POE unit they could sell >>>>> me? >>>>> >>>>> I think the power supplies probably aren't that hard to find, but the POE >>>>> apparently is.
