Appendix D: UTP Cabling
This appendix discusses various aspects of connection media. The performance of a DSR
switching system depends on high quality connections. Poor quality or poorly installed or
maintained cabling can diminish DSR system performance. DSR 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 DSR 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 DSR switching system supports either of these wiring standards. Table D.1
describes the standards for each pin.
Table D.1: UTP Wiring Standards
Pin EIA/TIA 568A EIA/TIA 568B
1 white/green white/orange
2 green orange
3 white/orange white/green
4 blue blue
Appendices 114
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