> > Diagnosis sounds pretty good... moving the cables could cause cable
> > but the plugs are more likely to be damaged than the cable, however it's
> > unheard of. Doing stuff like running cables where people are likely to
> > on them, or putting too sharp a bend in a cable is not good. If I
> > correctly the minimum bend radius is about 38mm.
> > BTW the U in UTP (as in UTP patch cable) stands for "Unshielded"; you
> > unlikely to have bought a shielded patch cord (FTP, where the "F" stands
> > "fully shielded").
> Do you mean when something is pressing on the cable, the chance of getting
> errors actually increase?
Twisted pair cables as used for data networks are constructed so that each
pair is balanced; i.e. the pair is twisted round each other ata specific
rate of twist. The four pairs are twisted at different rates so that the
can't interfere with each other. The four twisted pairs are then twisted
together, again to reduce the chance of causing or recieving interference.
When a twisted par cable is laid straight the cable is perfectly balanced.
However, should the cable be bent, or if pressure is applied to the cable
then it can push the twists out of balance and increase the chance of some
sort of interference occuring. Likewise if a cable is subject to too much
tension (like when pulling it off a drum), it can by damaged just by pulling
This is why when data cabling is professionally installed it should be laid
using a route with the minimum number of changes of direction.
Quote:> What kind of interference can affect network cables?
Running data cables alongside power cables is generally thought to be bad
practice these days, (with the network speed going up the likelihood of a
small amount of interference causing network problems increases). There is a
recent European data installation standard for the use of 3-compartment
trunking which states that the data & power cables should be in opposite
compartments with voice cabling using the centre compartment; i.e. if they
have to run parallel then have them as far apart as possible.