Many of the basic testers use DC voltage to test the lines, so they wouldn't pass through the inserter to test those lines.
On Fri, Sep 8, 2017 at 1:04 PM, <ch...@wbmfg.com> wrote: > If you took a POE inserter and put the tester on the data only side, that > should protect the tester. > In theory you can capacitively couple ethernet but I have never tried it. > > *From:* Rory Conaway > *Sent:* Friday, September 8, 2017 11:37 AM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Basic Ethernet cable tester that survives PoE > voltage? > > > https://www.amazon.com/Generic-sfg-Network-Tester- > Telephone/dp/B00G55ZGZ8/ref=sr_1_5?ie=UTF8&qid=1504892183& > sr=8-5&keywords=ethernet+tester > > > > > > I’ve seen them for $5 but this is still a pretty good deal. > > > > Rory > > > > *From:* Af [mailto:af-boun...@afmug.com] *On Behalf Of *Mike Hammett > *Sent:* Friday, September 8, 2017 10:35 AM > *To:* af@afmug.com > *Subject:* Re: [AFMUG] Basic Ethernet cable tester that survives PoE > voltage? > > > > Pockethernet? > > > > ----- > 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: *"Colin Stanners" <cstann...@gmail.com> > *To: *af@afmug.com > *Sent: *Friday, September 8, 2017 11:57:59 AM > *Subject: *[AFMUG] Basic Ethernet cable tester that survives PoE voltage? > > I'm looking for a basic-level Ethernet cable tester that only checks the > wiremap, gives pass/fail and preferably is <$100 and has a simple TDR. > > It must survive Canopy 30V PoE voltage as it seems that many of the dead > testers that we have in a pile are due to field techs plugging them into > live lines. Monoprice $80 tester is OK but definitely does not survive the > live lines. > > A test I'm considering is soldering ~15V zener diodes inside a unit to > trigger a PSU's short protection before frying the cable tester... > > >
