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] <mailto:[email protected]>>
To: [email protected] <mailto:[email protected]>
Sent: 3/25/2017 9:28:51 AM
Subject: Re: [AFMUG] Fw: Netonix
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:
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:
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:
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 <http://netlinx.net>
Josh Luthman
Office: 937-552-2340 <tel:%28937%29%20552-2340>
Direct: 937-552-2343 <tel:%28937%29%20552-2343>
1100 Wayne St
Suite 1337
Troy, OH 45373
On Fri, Mar 24, 2017 at 11:45 AM, Chuck McCown
<[email protected]> wrote:
Anyone know the email for the guy that runs Netonix?
