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Resolved Question

length of ethernet cables

by jjbb34 / December 4, 2011 4:18 AM PST

At what length, if any, does the signal dissipate when running an ethernet cable to a wifi connection. Wanting to put my airport express in my attic, wanting to know if there is a difference between 15ft. and 20ft. in regards to signal.

jjbb34 has chosen the best answer to their question. View answer
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All Answers

Best Answer chosen by jjbb34

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100 Meters.
by R. Proffitt Forum moderator / December 4, 2011 4:22 AM PST

While you have a good question, Ethernet over twisted pair is rated for use up to 100 Meters. At such short lengths, no one would take time to measure signal loss.

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ethernet cable lenghts
by jjbb34 / December 4, 2011 7:18 AM PST
In reply to: 100 Meters.

Thanks for the reply, good to go.
Could you please explain what you mean by"over twisted pair"
Thanks, again

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Ethernet came out long ago.
by R. Proffitt Forum moderator / December 4, 2011 8:28 AM PST
In reply to: ethernet cable lenghts

The first Ethernet system I wired used 50 ohm cable, tees and terminators.

Today folk rarely see or know about it.

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(NT) Boy, I remember that one.
by Coryphaeus / December 4, 2011 9:51 PM PST
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Vaguely remember
by pgc3 / December 5, 2011 1:28 AM PST

WOW that goes back a ways, seems as if Bob has been at this quite a while, I have to say that I am impressed,

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Twisted pair . . .
by Coryphaeus / December 4, 2011 9:54 PM PST
In reply to: ethernet cable lenghts

Inside the Ethernet cable sheath are four "pairs" of wires. These pairs are twisted for one reason. Twisting reduces induction (both mutual and self) and in effect reduces signal loss. More twists per inch enables longer lengths.

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