Avocent MergePoint Unity, Инструкция по установке и эксплуатации

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Appendix C: UTP Cabling
This appendix discusses various aspects of connection media. The performance of a MergePoint
Unity switching system depends on high quality connections. Poor quality or poorly installed
or maintained cabling can diminish MergePoint Unity switching system performance.
MergePoint Unity switching systems utilize UTP cabling.
NOTE: This appendix is for information purposes only. Please consult with your local code officials and/or cabling
consultants prior to any installation.
UTP copper cabling
The following are basic definitions for the three types of UTP cabling that the MergePoint
Unity switch supports:
• CAT 5 UTP (4-pair) high performance cable consists of twisted pair conductors, used
primarily for data transmission. The twisting of the pairs gives this cable some immunity
from the infiltration of unwanted interference. CAT 5 cable is generally used for networks
running at 10 or 100 Mbps.
• CAT 5E (enhanced) cable has the same characteristics as CAT 5, but is manufactured to
somewhat more stringent standards.
• CAT 6 cable is manufactured to tighter requirements than CAT 5E cable. CAT 6 has higher
measured frequency ranges and significantly better performance requirements than CAT 5E
cable at the same frequencies.
Wiring standards
There are two supported wiring standards for 8-conductor (4-pair) RJ-45 terminated UTP cable:
EIA/TIA 568A and B. These standards apply to installations utilizing CAT 5, 5E and 6 cable
specifications. The MergePoint Unity switching system supports either of these wiring
standards. Table C.1 describes the standards for each pin.
Table C.1: UTP Wiring Standards
Pin EIA/TIA 568A EIA/TIA 568B
1 white/green white/orange
2 green orange
3 white/orange white/green
Appendices 75