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Re: More 100Mbit
Pardon me for barging in, but did you know that the usual flat cable used
in 10 MBPS ether with RJ 45 connectors is NOT approved for 100 MBPS ?
Re: Short cables & crosstalk
Short cables have remarkably low crosstalk, because they are short. Long
cables have more crosstalk.
Re: length
If you happen to hit a (sub) multiple of lambda with your cable length,
which is obviously not of the right kind, then you will have problems.
(lambda is the wavelength of the signal, in theory it should be 100 MHz
for 100 MBPS, or about 3 meters).
100 MBPS is MUCH heavier on cable quality than 10 MBPS (about TEN TIMES
more so). If I remember well, they want 120 ohm cables (but I may be
wrong). Use anything else and you will have troubles. Incidentally, if
you'd use coax and the proper coax then there would be no problems (i use
coax whenever I can, those twisted pairs date back to when coax was
expensive and people wired large buildings). 120 ohm 1pair + shield coax
was used by IBM token ring ? Maybe you can find an old cable and get the
wire from there.
regards,
Peter