John E. Perry wrote:
James Knott wrote:
G T Smith wrote:
John E. Perry wrote:
Russell Jones wrote:
...
Disagree. For 100Mbps, just get Cat. 5. It'll work fine. Spend your
pennies on something else.
Same here. I have my home network connected with cat-5E (only a little
more costly than cat-5 when I bought it, and it runs 100Mbps just fine
-- even over the 40 ft to my son's room.
John Perry
If I remember correctly shielding is a two way thing, basically you are
running a potential 40ft radio aerial in the latter case. If you have a
lot of cables or have anything which is sensitive to radio emissions
close by, Cat 6 starts making sense.
????
There are two ways to reduce interference to & from a cable. Those are
shielding and twisted pairs. UTP cable, including CAT 6 relies on
twisted pairs to reduce interference. Unless the twist rate for CAT 6
is significantly more than CAT 5, there will be little difference
between the two for interference purposes.
In fact, twisting is superior to shielding in practical installations,
unless there's a great deal of near-field interference, when shielding
can be really effective. But the purpose of the high-quality cables is
to preserve waveform fidelity, which is why the more carefully made
cables give better bandwidth.
I didn't know cat-6 cables were available yet. I'll have to give it a look.
This is true, but they won't give you any better performance for
100Mbps. If there's an EMR source bad enough to affect them, you should
work around it (move it or the cables, or perhaps shield them better,
e.g. with metal ducting) not replace them with Cat. 6, or other more
heavily shielded cable, unless there's really no other way. In normal
situations, though, you just don't need them. You can put bundles of
dozens of shielded Cat. 5 cables in your walls without any problems of
crosstalk (doing this redundantly is a good way of being prepared for
faults in cables that may develop later). By all means though, buy
shielded rather than unshielded Cat. 5 (or Cat. 5e if you want to be
pedantic; but you can't easily get anything else, so it's not a very
relevant distinction).
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