The important specs are twists per foot and capacitance per foot with the capacitance being the most important. The lower the capacitance per foot the lower the attenuation and the lower the crosstalk (because there is capacitive interaction with neighboring pairs as well). If you can find a cable with lower capacitance per foot you can go further.
Greg On Dec 7, 2009, at 8:37 AM, 3-dB Networks wrote: > I once had a Tranzeo radio running at near 500ft of cable, at 100 Base full, > with no problems. Granted it was Belden 7919 Shielded Cable... it was a > backhaul for my house and didn't have issue with the cable (getting the > radio to deal with the noise floor was a separate issue :-) > > FWIW... I've run many radios to 350ft on 802.3af power and 24v PoE with no > issues. I of course try to avoid it, but I often wonder if those > recommendations were for CAT5 cable, and 5e allows you to stretch a little > bit further... > > Daniel White > 3-dB Networks > http://www.3dbnetworks.com > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of Josh Luthman > Sent: Monday, December 07, 2009 12:39 AM > To: WISPA General List > Subject: Re: [WISPA] Long Cat5 Run > > Voltage won't be a problem. http://www.wisp-router.com/poecalculator.php > > At 320 feet you should be OK with the Ethernet timing. I have done 340 with > 48v Ceragon (that's AirMux FYI) gear. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "The secret to creativity is knowing how to hide your sources." > --- Albert Einstein > > > On Mon, Dec 7, 2009 at 2:31 AM, Robert West > <[email protected]>wrote: > >> Confusing info on the net so I guess I better ask. >> >> >> >> I need to run a Cat5 line near 320 feet. I know that over 300 could cause >> issues but if I put my PoE switch about 20 or 30 feet in and then run the >> rest of the way, will we be golden or will we risk attenuation? Seems to >> be >> confusion on the net over use of switch curing the attenuation. >> Personally >> I think the switch will make it all cool, just want to make sure. >> >> >> >> I use outdoor, solid core, shielded, flooded cable with static drain. >> Running it to a Mikrotik 600a using 4 R52N cards. >> >> >> >> Another thought, running 48v though 290 feet of solid core Cat5.... Do ya >> think I'll have enough juice the end of the run to power up that 600a and >> the 4 R52N's? >> >> >> >> Just so ya know. >> >> >> >> >> >> >> >> >> > ---------------------------------------------------------------------------- > ---- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> >> > ---------------------------------------------------------------------------- > ---- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
