So I guess what I am asking is do you have an opinion if fiber plus dc only might be "better" in some way than poe?
On Wed, May 10, 2017, 3:32 PM <[email protected]> wrote: > I guess my point is that you do not want MOVs for data. > The sidactors are extremely fast and they are on all my stuff. > Along with gas tubes, which are much faster than MOVs too. > > > > *From:* Lewis Bergman > *Sent:* Wednesday, May 10, 2017 11:42 AM > *To:* [email protected] > *Subject:* Re: [AFMUG] Suppression Question > So Chuck, what is your opinion then? Looking at your site there is only > about a $10 delta between the DC only and POE if I was looking at the right > ones. Can you make an product to clamp faster without data on the lines or > am I just imaging that? My thought was you could design it closer to 48 > volts but most equipment draws a lot more than that on startup anyway. > > On Wed, May 10, 2017 at 10:21 AM <[email protected]> wrote: > >> MOV is slow and bad for data but power >> SAD is fast but not robust >> Gas tube is robust >> >> I use all 3 on my power surge arrestor products. >> >> *From:* Lewis Bergman >> *Sent:* Wednesday, May 10, 2017 9:12 AM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] Suppression Question >> When I made the decision to the extent possible, eliminate CAT5 powered >> devices and go all fiber and 48VDC I based it on two things. >> I found MOV/SAD combination devices for about $15 to protect the DC line >> compared to about ~$65 at the time for CAT5. Not only that, I found those >> devices speced faster clamp times. I assume since they did not have to >> worry about the voltage differentials of the data pairs. Chuck could >> obviously answer that one. This was a long time ago so I can't say what >> current pricing would be. I also found after converting to that that we had >> less, not zero, but less issues with the fiber plus DC with protection >> setup than the same equipment fed CAT5 POE with surge. >> >> We used all DIN mounted stuff. >> >> On Wed, May 10, 2017 at 10:02 AM Mike Hammett <[email protected]> wrote: >> >>> *nods* I was hoping for a more sciencey and bean countery answer. ;-) >>> >>> >>> >>> >>> ----- >>> 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: *[email protected] >>> *To: *[email protected] >>> *Sent: *Wednesday, May 10, 2017 9:58:40 AM >>> *Subject: *Re: [AFMUG] Suppression Question >>> >>> >>> Any exposed conductor will have a voltage induced on it by lightning >>> strikes. Less conductors, less problems. I would think fiber and power >>> would be more robust than ethernet. >>> >>> *From:* Mike Hammett >>> *Sent:* Wednesday, May 10, 2017 8:56 AM >>> *To:* [email protected] >>> *Subject:* [AFMUG] Suppression Question >>> >>> This question is intended for Chuck and Forest, but I'll accept answers >>> from anyone else qualified. >>> >>> I assume that the costs and complexities of doing surge suppression on a >>> basic 48v DC power cable are much lower than doing so on a cat6 cable, >>> trying to preserve GigE or above. Could you confirm that and perhaps back >>> it up with costs, commentary, etc.? >>> >>> My point is to show that DC+ fiber not only is better for the data ports >>> on both sides, but also for the tower equipment in general by being able to >>> do more effective and less expensive surge suppression on raw DC than >>> Ethernet. >>> >>> >>> >>> ----- >>> 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> >>> >>
