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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) or 6 cable
should be used. The Category 5e and 6 specifications include 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.
Table B-2. 1000BASE-T MDI-X and MDI Port Pinouts
Pin
MDI-X Signal Name
MDI Signal Name
1
Bi-directional Data Two Plus (BI_D2+)
Bi-directional Data One Plus (BI_D1+)
2
Bi-directional Data Two Minus (BI_D2-)
Bi-directional Data One Minus (BI_D1-)
3
Bi-directional Data One Plus (BI_D1+)
Bi-directional Data Two Plus (BI_D2+)
4
Bi-directional Data Four Plus (BI_D4+)
Bi-directional Data Three Plus (BI_D3+)
5
Bi-directional Data Four Minus (BI_D4-)
Bi-directional Data Three Minus (BI_D3-)
6
Bi-directional Data One Minus (BI_D1-)
Bi-directional Data Two Minus (BI_D2-)
7
Bi-directional Data One Plus (BI_D3+)
Bi-directional Data One Plus (BI_D4+)
8
Bi-directional Data Three Minus (BI_D3-)
Bi-directional Data Four Minus (BI_D4-)
Summary of Contents for 8648T FICHE
Page 2: ......
Page 17: ...CONTENTS xiii APPENDICES Warranty C 4 D Ordering Information D 1 Glossary Index ...
Page 20: ...FIGURES xviii ...
Page 30: ...ABOUT THE TIGERSWITCH 10 100 1000 1 10 ...
Page 46: ...INSTALLING THE SWITCH 3 10 ...
Page 68: ...ORDERING INFORMATION D 2 ...
Page 74: ...GLOSSARY Glossary 6 ...
Page 78: ...INDEX Index 4 ...
Page 79: ......