The best isolation is two back to back fiber media converters. From: Jaime Solorza Sent: Monday, January 22, 2018 9:18 AM To: Animal Farm Subject: Re: [AFMUG] Use Unpowered PoE Injector on Long Ethernet Runs?
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 Midwest Internet Exchange The Brothers WISP ------------------------------------------------------------------------------ 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?
