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| Testing
Standard |
A number of factors are driving the evolution of structured
cabling standards. These include:
New high-speed network
standards such as Gigabit
Ethernet
The requirements for additional measurements such as
propagation delay skew,
return loss, power sum near end
crosstalk (PSNEXT) and
equal level far end crosstalk (ELFEXT)
Improvements in cable and component design
Recognition of performance differences between unshielded,
screened and shielded/screened
twisted pair cabling designs
Regional concerns about electromagnetic radiation effects
on
data as well as the environment
The desire for harmonization in link definitions and cabling
performance requirements
in North America, Europe, and other
markets
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