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B-5
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:
When testing your cable installation, be sure to include all
patch cables between switches and end devices.
Adjusting Existing Category 5 Cabling
If your existing Category 5 installation does not meet one of the
test parameters for 1000BASE-T, there are basically three measures
that can be applied to try to correct the problem:
1. Replace any Category 5 patch cables with high-performance
Category 5e cables.
2. Reduce the number of connectors used in the link.
3. Reconnect some of the connectors in the link.
Summary of Contents for TIGERSWITCH 10/100
Page 2: ......
Page 12: ...COMPLIANCES viii...
Page 16: ...TABLE OF CONTENTS xii...
Page 44: ...INSTALLING THE SWITCH 3 8...
Page 54: ...TROUBLESHOOTING A 4...
Page 62: ...CABLES B 8...
Page 70: ...ORDERING INFORMATION D 2...
Page 76: ...Glossary 6...
Page 80: ...Index 4 W warranty C 4 Web based management 1 2 Weighted Round Robin Queuing 1 7...
Page 81: ......