My thoughts on fiber and power up the tower. If you are doing more than 6 runs of good shielded cable over 200 feet then fiber isn’t that much more expensive. You are going to burn through 2 boxes of cat5/6. Thats the cost of your fiber right there.
You get several benefits with Fiber. Eric does it a little different than I do. With his system make sure all of your grounds are good. All of them tied back to a single place. I differ in my thinking. Not saying his way is wrong, just a school of thought. My school involves floating the ground. Fiber and DC travel up the tower to a RB2011, which acts as a media converter. The APS and Backhauls can be powered by whatever works for you. Dumb POEs, PacketFlux, Tycon power, etc. This floating ground isolates the equipment from house power. We see most of the events come from the house side and travel up the tower on it’s way to reaching out to the sky. This is how most lightning “strikes” happen anyway. So, we cut off the path from the house power to the equipment with deep cycle batteries and such. I did a blog article about our box design. http://www.mtin.net/blog/?p=277 <http://www.mtin.net/blog/?p=277> Justin --- Justin Wilson <[email protected]> http://www.mtin.net <http://www.mtin.net/> Managed Services – xISP Solutions – Data Centers http://www.thebrotherswisp.com <http://www.thebrotherswisp.com/> Podcast about xISP topics http://www.midwest-ix.com <http://www.midwest-ix.com/> Peering – Transit – Internet Exchange > On Aug 3, 2015, at 1:06 PM, David <[email protected]> wrote: > > Seems like a lot of work for a single site. > We use the hybrid cable like Lewis mentioned and we also use the hangers but > negate the extra run of > wire for power. > �I also used a CMM4 to do everything your box does. > > > On 08/03/2015 11:21 AM, Eric Rogers wrote: >> ALL of our major towers (100 people or more) and all new builds have fiber >> up.� We use Outside Plant (same as we use for FTTx) up the tower, and use >> 1/2� hoisting grips with 1/2� snap-in hangers.� We then use Corning >> CCH-CF patch panels at the top and a rack mount at the bottom.� As for >> power, we run Liquid Tight �� ARMORED conduit and use 7/8� hoist grips >> and snap-in hangers.� We do run 120v to the top, and put an outlet box at >> the top.� Then we down-convert to 24v with PacketFlux sync and PoE >> gear.� For the 1-off like airfibers, we then just use a PoE injector at >> the top. >> � >> BE SURE TO USE GROUND KITS ON ALL FIBER AND ELECTRICAL CONDUIT AT THE TOP >> AND BOTTOM! >> � >> We then use a Sinewave Inverter/Charger (Xantrex Freedom SW) and BIG telecom >> batteries for the UPS. >> � >> The only damage we have sustained was because lightning hit the transformer >> directly and actually blew it up.� The power company had to replace it >> totally� >> � >> Eric Rogers >> >> <Mail Attachment.png> >> www.pdsconnect.me <x-msg://2/www.pdsconnect.me> >> (317) 831-3000 x200 >> � >> From: Af [mailto:[email protected] <mailto:[email protected]>] On >> Behalf Of Paul McCall >> Sent: Monday, August 3, 2015 10:53 AM >> To: [email protected] <mailto:[email protected]> >> Subject: [AFMUG] Fiber up the tower vs. ethernet >> � >> We are seeking feedback from people that are using fiber up the tower >> instead of Cat5.� Interested to know what equipment (power) you are >> running at the base, and what equipment (switches, routers, POE, Ethernet >> protection etc.) �that you have at the top. >> � >> How is it working for you?� Has having everything at the top proved to be >> much more stable?� It�s kinda scary to change from our current way of >> doing it, but power surges are kicking are butt, clobbering radios on the >> Ethernet side (mostly ePMP).� >> � >> Looking forward to some good feedback. >> � >> Thanks! >> � >> Paul >> � >> Paul McCall, Pres. >> PDMNet / Florida Broadband >> 658 Old Dixie Highway >> Vero Beach, FL 32962 >> 772-564-6800 office >> 772-473-0352 cell >> www.pdmnet.com <http://www.pdmnet.com/> >> [email protected] <mailto:[email protected]> >> � > >
