I made a post about it and you've got people going on and on about unrelated things. Active vs. passive PoE. That's nothing to do with this.
I'm sure other PoE switches have these deficiencies as well. Do we know which ones? ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP ----- Original Message ----- From: "George Skorup" <[email protected]> To: [email protected] Sent: Saturday, March 25, 2017 3:58:46 PM Subject: Re: [AFMUG] Fw: Netonix I've never lost one of Chuck's suppressors to lightning/surges. The 5 or so that I have has all been because of the cable leaking water down into GIGE(-POE)-APCs at the bottom. Had one last week. Of course, had to be the only non-gel tape cable running up the tower. I see the ethernet link suddenly start flapping. Bounce the MikroTik port. Nope. Log into the SiteMonitor, the SyncInjector port shows it's using about 400mA. Seems normal, but wait, the other sectors aren't consuming that much. I knew right then and there what it was. I get to the site and it's sizzling, rj45 all burnt up, but the radio is still powered up and transmitting, just no ethernet link. SyncInjector port didn't trip, obviously because the fixed 2A limit wasn't reached. Lost nothing other than the GigE-APC. Stripped the cable, put a new Rj45 on it without the jacket in the plug, tied it to the rack post, put a coupler and a patch cable in place of the APC, plugged it all back in and left. Not even any ethernet errors with the water in the cable. AFAIK, CMMs and LMG CTMs have always had port protection. Dumb POE injection without over-current protection.. been there, done that. In-line suppressors or not, many radios these days are coming with surge suppression built in, like 450 APs. Methinks it's a fundamental design issues that Mr. Netonix should revise. On 3/25/2017 8:35 AM, Adam Moffett wrote: There are other reasons a cable could short: water ingress, accidental cut, faulty device. Changing your surge suppressor is a good idea, but I think PoE devices ought to include short circuit protection anyway. ------ Original Message ------ From: "Chuck McCown" < [email protected] > To: [email protected] Sent: 3/25/2017 9:28:51 AM Subject: Re: [AFMUG] Fw: Netonix <blockquote> If an impulse comes along and the surge suppressor clamps to ground, you run the risk of smoking the Netonix POE transformer. It will not protect itself against shorts. From: Josh Baird Sent: Saturday, March 25, 2017 7:23 AM To: [email protected] Subject: Re: [AFMUG] Fw: Netonix What exactly is the reason? We always run through your surge protectors before connecting to Netonix. On Mar 25, 2017, at 9:15 AM, Chuck McCown < [email protected] > wrote: <blockquote> Bypass ALL surge suppressors that are connected to Netonix, irrespective of manufacturer. From: [email protected] Sent: Saturday, March 25, 2017 5:41 AM To: [email protected] Subject: Re: [AFMUG] Fw: Netonix So we should now bypass all our APC-type surge suppressors that are connected to Netonix? On Fri, Mar 24, 2017 at 11:26 PM, Chuck McCown < [email protected] > wrote: <blockquote> I am going to fix this little problem... Netonix will fix your port for something like $25 From: Bill Prince Sent: Friday, March 24, 2017 8:56 PM To: [email protected] Subject: Re: [AFMUG] Fw: Netonix Yeah. We accidentally hooked up an AF24 through a Cambium surge suppressor, and it fragged the port on the Netonix. We were swapping from something else that had been on the cable, and completely forgot that it was going through that surge suppressor. Hard lesson learned. bp <part15sbs{at}gmail{dot}com> On 3/24/2017 1:27 PM, Chuck McCown wrote: <blockquote> OK, had an exchange with Netonix today. It is just as Matt Hoppes said. You short out their POE and it will blow the Ethernet transformer. I really presumed they had circuitry like Forrest that could detect and shut down in an over current situation. They do have poly fuses which are slow to react and may protect it from a very brief short, but longer shorts will indeed harm the port feeding the transformer. So, Netonix is not active POE. I would say that on passive POE a plain surge suppressor should not be used. I am working some “non plain” surge suppressors now.... ;-) Stay tuned to this bat channel and a big thanks to Matt for forcing me to learn something new. It was painful, but I can do painful things when I have to. From: Chuck McCown Sent: Friday, March 24, 2017 10:01 AM To: [email protected] Subject: Re: [AFMUG] Netonix tnx From: Josh Luthman Sent: Friday, March 24, 2017 9:47 AM To: [email protected] Subject: Re: [AFMUG] Netonix chris.sisler ( A ) netlinx.net Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Fri, Mar 24, 2017 at 11:45 AM, Chuck McCown < [email protected] > wrote: <blockquote> Anyone know the email for the guy that runs Netonix? </blockquote> </blockquote> </blockquote> </blockquote> </blockquote>
