Well if that was the case, then what is different with the Surgeprotectors/injectors which would prevent such from happening ?
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: "Jon Langeler" <[email protected]> > To: [email protected] > Sent: Wednesday, December 7, 2016 12:56:12 PM > Subject: Re: [AFMUG] WTB IP-20C POE > 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.
