1000Base-T Cable Requirements; Cable Testing For Existing Category 5 Cable - SMC Networks EZ109DT User Manual

C
ABLES

1000BASE-T Cable Requirements

All Category 5 UTP cables that are used for 100BASE-TX
connections should also work for 1000BASE-T, providing that all
four wire pairs are connected. However, it is recommended that
for all critical connections, or any new cable installations, Category
5e (enhanced Category 5) cable should be used. The Category 5e
specification includes test parameters that are only
recommendations for Category 5.
Therefore, the first step in preparing existing Category 5 cabling
for running 1000BASE-T is a simple test of the cable installation to
be sure that it complies with the IEEE 802.3ab standards.

Cable Testing for Existing Category 5 Cable

Installed Category 5 cabling must pass tests for Attenuation,
Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT). This
cable testing information is specified in the ANSI/TIA/EIA-TSB-67
standard. Additionally, cables must also pass test parameters for
Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These
tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, "The
Additional Transmission Performance Guidelines for 100 Ohm
4-Pair Category 5 Cabling."
Note that when testing your cable installation, be sure to include
all patch cables between switches and end devices.
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