We use isolators at many well and liftstations to prevent this on Ethernet and signalling runs. All are grounded.
Jaime Solorza On Jan 22, 2018 8:54 AM, "Chuck McCown" <[email protected]> wrote: > Not if you break galvanic or capacitive coupling with magnetics. > > *From:* Mike Hammett > *Sent:* Monday, January 22, 2018 8:52 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs? > > You will still get differences from the things plugged into the switches. > > Glass, wireless or better ground potential equalization. > > > > ----- > Mike Hammett > Intelligent Computing Solutions <http://www.ics-il.com/> > <https://www.facebook.com/ICSIL> > <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> > <https://www.linkedin.com/company/intelligent-computing-solutions> > <https://twitter.com/ICSIL> > Midwest Internet Exchange <http://www.midwest-ix.com/> > <https://www.facebook.com/mdwestix> > <https://www.linkedin.com/company/midwest-internet-exchange> > <https://twitter.com/mdwestix> > The Brothers WISP <http://www.thebrotherswisp.com/> > <https://www.facebook.com/thebrotherswisp> > > > <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> > ------------------------------ > *From: *"Christopher Gray" <[email protected]> > *To: *[email protected] > *Sent: *Monday, January 22, 2018 9:17:41 AM > *Subject: *[AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs? > > I have a customer with bizarre issues. I've replaced almost everything but > odd issues keep coming back. > > The customer has a 100' run of Ethernet cable from the house to the barn, > and a switch in the barn. I'm wondering if there might be an issue with > different power sources, possibly different grounds between the router and > the switch. The issues are intermittent enough that I can't ask for them to > just disconnect their barn as it is used for work. > > If I install an unpowered gigabit PoE injector in-line with that 100' run, > will that eliminate any issues with different power or different grounds > between different buildings since the buildings would be on separate sides > of the magnetics, or do I need better separation? > > >
