We've had good luck with ferrite beads elsewhere. Not on this tower.
We had a tone/probe cable tester that when you would plug the probe into
the
ethernet cable going up the tower, you could hear the radio station, on
the
cable tester speaker.
Explain that one to me.
-Russ
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dennis Burgess
Sent: Thursday, May 17, 2007 4:50 PM
To: WISPA General List
Subject: Re: [WISPA] Ethernet over 328ft
the AM towers, the little farite ring or whatever it is, is worth its
wait
in gold. We are about 300 feet from a AM tower, the power 1000
watts, was
enough for us to burn our fingers on the cat5 end without ether end
plugged
in! And I do mean, you start to smell burning skin, not good!
Dennis
On 5/17/07, Russ Kreigh <[EMAIL PROTECTED]> wrote:
>
>
>
> One thing to remember is that the spec also specifies that two patch
> cords may be used. A 90Meter Horizontal run, with 3M patch cord from
> the wall jack to the work area, and a 6M patch cord in the wiring
closet.
>
> The extra two male plug/female jacks create an insertion loss of about
> 82ft, assuming top quality connections. This does not include the 110
> IDC connectors for the patch panels, those also add significant
> insertion loss.
> So, there your close to 400ft, and, to a stretch, it's within the
spec.
>
>
> The other is how long it takes the signal to get from one side of the
> wire to the other. And how many bit times it takes to detect a
> collision, which needs to happen within 512-bit times. So, just based
> on the math, you could get away with 672 feet.
>
> I've run FastEthernet farther than 100M many times. But, I also had to
> put in a switch at mid-point on 300ft cable run this week, too. It was
> an AM-tower though, I don't think it was the distance getting us, but
> the interference.
>
> So, if your on an interference free tower, use good cable, good ends,
> and good installation techniques and you'll be fine with 400ft.
>
> Thanks,
> -Russ
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> On Behalf Of Erik Jansson
> Sent: Thursday, May 17, 2007 4:01 PM
> To: 'WISPA General List'
> Subject: [WISPA] Ethernet over 328ft
>
> The Ethernet spec is for a maximum cable run of 328ft. What is the
> the spec limits it to this distance, timing, cable resistance? I need
> to do an outdoor run of 350-400ft, not real keen on fiber as I then
> need to power a converter and I have doubts of a converter that will
> with stand the cold being available. It is a critical cable run. I
> don't need the full 100mb.
>
> Any feed back, ideas, or experience would be great.
>
> Erik
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--
Dennis Burgess, MCP, CCNA, A+, N+, Mikrotik Certified Consultant
www.mikrotikconsulting.com [EMAIL PROTECTED]
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