Split a network cable

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Originally Posted by redsnappa

The unused 4 cables in a Cat5 cable are there for a reason, to decrease crosstalk, an increase in crosstalk would cause a reduction of the signal quality on any cable that was split as in the Micromart article.

If the signal quality falls below a certain level the network speed would reduce to 10 Mbps through the auto negotiation process.

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How do these cables reduce crosstalk?

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How do these cables reduce crosstalk?

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Twisting wires decreases interference because the loop area between the wires (which determines the magnetic coupling into the signal) is reduced. In balanced pair operation (as in Cat5/6), the two wires typically carry equal and opposite signals (differential mode) which are combined by subtraction at the destination. Thus the noise from the two wires cancel each other in this subtraction because the two wires have been exposed to similar EMI.

Sounds silly to me, surely there'll be a problem with cross talk as there are more active wires????/

just run two cables you cheap people :P, even we can afford them!!!

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Originally Posted by Geoff

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How do these cables reduce crosstalk?

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Twisting wires decreases interference because the loop area between the wires (which determines the magnetic coupling into the signal) is reduced. In balanced pair operation (as in Cat5/6), the two wires typically carry equal and opposite signals (differential mode) which are combined by subtraction at the destination. Thus the noise from the two wires cancel each other in this subtraction because the two wires have been exposed to similar EMI.

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"Wikipedia" Geoff

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why shouldnt you split a cable with a gigabyte link? (WORKSTATION?)

ok sorry to cause such a debate. This is for home use would not dream of doing it at work. Also it stopped me getting a ear bashing from the misses RE mess time and wasting time that i could have been painting the fence. I was told that it could be dome on cat 5e and 6 only as the 4 spare wires are redundent unless using POE or 1gb lan in wich case i would not work. As for interferance if it is done right it should work fine. And it does took me 5 mins to do now kids have xbox and pc on network working fine and wii runs off pc via conection sharing. thanks for the help and the mrs is happy as well as i got the fence painted did not spend all day messing with poxy computers as she puts it.

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Originally Posted by badboyvtec

why shouldnt you split a cable with a gigabyte link? (WORKSTATION?)

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My guess is with the increased rate there will be more crosstalk, which will further compound the problem of using all 8 wires in the cable..

Same reason why you need an 80pin (40 real 40 shields) cable for fast IDE Drives rather than a 40pin....

:)

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Originally Posted by badboyvtec

why shouldnt you split a cable with a gigabyte link? (WORKSTATION?)

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Because all 8 cables are used for gigabit, whereas only 4 are used for 10/100, therefore theoretically leaving 4 redunant cables.

not really if you consider the cat5e/6 is disigned for 1gb and the max you and send down 4 is 100mb X2 which is not as much data as it is designed for (sory about the spellings hope the fourm gets a spell cheack soon lol)

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Originally Posted by alonebfg

not really if you consider the cat5e/6 is disigned for 1gb and the max you and send down 4 is 100mb X2 which is not as much data as it is designed for (sory about the spellings hope the fourm gets a spell cheack soon lol)

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Google IESpell :p

Could try:

Lindy UTP Port Doubler

But you'll need two, so more expense.

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Originally Posted by MYK-IT

Could try:

Lindy UTP Port Doubler

But you'll need two, so more expense.

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And they're rubbish. Your better off withn a cheap 4 port switch to be honest.

CPC are cheaper

PRO SIGNAL|CAT 5 ECONOMISER|CAT 5 UTP DATA-DATA CABLE ECONOMISER | CPC
BELKIN|R6G058B|BELKIN CAT 5 UTP CABLE ECONOMISER | CPC

But you still need to buy a pair of them, we have a bunch of them around at work, for when someone breaks a socket.

Never had any problems with them, and this means each connection has a 100mb link to the switch, when a small 4port switch ends up splitting the link so 50mb (or less) each.