What I do is carry a spare 30 and a 50 mtr cat5 patch cable so that
when I suspect the cable (particularly if I did not run it) I can
quickly test it by replacement. I have only found a few faulty cables
but it has saved heaps of time diong this. I once found a knot in the
cable just where it dropped down the wall. It is so easy and you do
not need expensive test equipment, but the continuity/pair detector
approx $AU 150.00 are a must have.
If the speed rises then you know the existing cable may be faulty.
Crossed pairs is a common fault and unfortunately the detector
mentioned above will not find it, as it only checks for continuity and
correct polarisation of the pair, it does'nt care what colors you have
used.. A crossed pair has incorrect colors making a pair, the twist
rate per cable pair will be unbalanced, eg blue & green/white as one
pair, and green & blue/white as the other will show ok as a cable
pair, and may work at 10mhz but fail at 100 mhz, this can cause much
On Mon, 29 Sep 2003 08:14 +0100 (BST), XXXX@XXXXX.COM (Stuart