I had a 250 ft run that was acting up. I went from 1 amp power supplies
to 2 amp ones. Now it's not acting up. I am not an expert but from my
understanding you need to be careful when you add volts. Extra volts
will kill a radio but when you add amps it's fine because the radio only
pulls what amps it wants and leaves the rest alone.
Google "poe calculator"
http://www.google.com/search?q=poe+calculator&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official
Mark Nash wrote:
Hello...got a run of cat5 about 450' that is working but doesn't seem
to be sufficiently powering the amplifier built into the antenna. The
device is a Terabeam EtherAnt-Turbo/LR (same as Proxim's Terastar
EtherAnt/LR). It works but SNR should be better. If I power the
thing locally (25' of cat5) it works as it should, so I think it may
be insufficient power.
It's got a 48v 0.4a power supply. I know that it's far over spec for
PoE...but specs were made up from engineers who have to play it safe
for what they recommend. So...any field answers to my dilemma? Is
more information needed?
Perhaps a side question: What drops over distance...volts or amps?
Please consider the non-electrically-experienced crowd.
Thanks much.
Mark Nash
Network Engineer
UnwiredOnline.Net
350 Holly Street
Junction City, OR 97448
http://www.uwol.net
541-998-5555
541-998-5599 fax
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