A few additions:
An "e" stuck on the end of the category denotes "enhanced
", therefore category 5e
cable is enhanced category 5 cable. This simply means that the physical
and electrical characteristics
surpass those of the numbered category. An "enhanced" category or a larger number improves performance
due to better handling of crosstalk
, and more.
-568-A is the main standard for UTP. This standard specifies up to category 5e. Any company who claims its product is category 6 compliant
is referring to a draft
of a standard - and possibly not even the draft of the ANSI standard.