I was talking about powering 1 CPE and 1 AP with 1 POE for micro pops — Sent from Mailbox
On Mon, Oct 6, 2014 at 2:40 AM, Forrest Christian (List Account) via Af <[email protected]> wrote: > 150W is pretty hard to deliver via CAT5. > Each wire is rated at .577 amps. Ignoring other concerns, this means at > 48V, you get about 25 watts with a bit of margin, per wire. If you are > sending the power up on two pairs, and returning it on the other two, this > means you only have about 100W total you can do via CAT5 (110W with no > margin). To do over 100W you have to use something else for the return > path, say the tower or a ground wire - in which case you could send 200W up > a CAT5 cable and return it via ground. > Personally once you get that much power in a CAT5 cable it scares me. A > LOT of voltage drop, challenges in injection methods, etc > Most ethernet magnetics top out at about 25.5W for power on two pairs, and > 51W for four. This also corresponds to the 802.3at spec. I guess if > you're returning on ground, you can also get 102W. > Right now I'm focusing on the <50W category (ok, maybe a smidgen more). > -forrest > On Sun, Oct 5, 2014 at 6:46 PM, Matt Jenkins via Af <[email protected]> wrote: >> Exalt ExtremeAir Radios draw 135watt average over PoE. Telrad Radios we >> use draw up to 150watt but usually around 120ish. >> >> >> >> Matthew Jenkins >> SmarterBroadband >> [email protected] >> 530.272.4000 >> >> On 10/05/2014 04:55 PM, Gino Villarini via Af wrote: >> >>> What radio needs 150w? >>> >>> >>> >>> Gino A. Villarini >>> President >>> Aeronet Wireless Broadband Corp. >>> www.aeronetpr.com >>> @aeronetpr >>> >>> >>> >>> From: "[email protected] <mailto:[email protected]>" <[email protected] <mailto: >>> [email protected]>> >>> Reply-To: "[email protected] <mailto:[email protected]>" <[email protected] <mailto: >>> [email protected]>> >>> Date: Sunday, October 5, 2014 at 7:14 PM >>> To: "[email protected] <mailto:[email protected]>" <[email protected] <mailto: >>> [email protected]>> >>> Subject: Re: [AFMUG] PacketFlux Product Ideas >>> >>> This is actually in the category of what I'm expending a fair bit of R&D >>> on right now. >>> >>> The challenge comes cost. 150watt per port is very expensive to do when >>> factoring in the DC-DC conversion. 20W is easy. 50W is a bit harder. >>> 150W gets very expensive quickly. >>> >>> As a result, I'm thinking somewhat modular, i.e. pick/choose. >>> >>> I also have to be mindful of the competitors in the space, in that I want >>> to be different in the right ways. The power injection/switching space is >>> quite crowded. >>> >>> -forrest >>> >>> On Sun, Oct 5, 2014 at 2:35 PM, Matt Jenkins via Af <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> Our infrastructure sites look like this: >>> >>> Shielded Cables -> 8 or 24port shielded patch panel >>> -> APC PRM24 with WB Surge Modules >>> -> PoE Injectors >>> -> Switch / Router >>> >>> PoE Injectors are attached to a Masterswitch. >>> >>> >>> <pipe dream> >>> I know this probably is not feasible but.... >>> What I would REALLY like is an active PoE midspan injector (8/24 >>> gigabit port). Something that does not require a site monitor (has >>> web/snmp function built in). It takes AC power and can output DC >>> to each type of device. This device would be software configurable >>> for power type and has apc masterswitch functionality. It would >>> need to support up to 150watt per port for WiMAX and Licensed Link >>> Radios. It would need to support from 12vdc to 56vdc output. If >>> there was a model that also supported power out to a few (4) AC >>> outlets I wouldn't even need an APC Masterswitch. The goal is to >>> replace all those PoE injectors which don't mount in a rack or on >>> a din rail in a box. >>> </pipe dream> >>> >>> >>> >>> Matthew Jenkins >>> SmarterBroadband >>> [email protected] <mailto:[email protected]> >>> 530.272.4000 <tel:530.272.4000> >>> >>> >>> >>> On 10/05/2014 01:19 PM, Forrest Christian (List Account) via Af wrote: >>> >>> It's been (quite) a while since I sent one of these messages >>> out to the list. >>> >>> With the release of all of our new gigabit injectors, it is >>> time for me to decide which products will be next out the door >>> at PacketFlux. >>> >>> We've got several products at various stages of completion, >>> but almost all of them I expect to be very low volume projects >>> - the type of products we complete just because they help fill >>> out our product offering instead of expecting a lot of revenue >>> from them. A couple of these have appeared on the website >>> recently - I.E. a 2 Relay, 3 Switch module, and the >>> voltmeter/shunt input modules. >>> >>> So, what I'd love to hear is some suggestions for products >>> PacketFlux could build which would help you in your WISP. I'm >>> particularly looking for products which if they existed would >>> go at every one of your tower sites, or even better at every >>> customer location. I know these product ideas exist out >>> there, and I'd love to hear them. Feel free to throw ideas >>> out which are outside of the narrow niche that you think of >>> PacketFlux fitting into. >>> >>> One final note - there is always a query for an all-in-one >>> tower device which includes some mixture of ac power supply, >>> dc-dc conversion, battery charging/management, Ethernet >>> switch, router, power injection, fiber conversion, etc.. I've >>> heard those loud and clear and am aware of that desire. >>> There's work being done in-house toward something like that, >>> but there are many hurdles left to make it a reality. If >>> there's a simplified version of this which would fit a >>> specific, widespread, need I'd love to hear about it, but the >>> idea of a device you put into your rack and it handles >>> everything needed at a tower site is still quite a ways off >>> for us. >>> >>> So, throw your best ideas out there... I'd love to take a >>> couple and run with them. >>> >>> -forrest >>> >>> >>> >>> >>> >>> >>> >>
