Avocent DSRTM 1021 - Manual (Page 70)

Appendices 69
Appendix D: UTP Cabling
The following information is intended to brief you on various aspects of
con nec tion 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.
NOTE: This appendix is for information purposes only. Please consult with your local code
offi cials and/or cabling consultants prior to any installation.
DSR switching systems utilize UTP cabling.
UTP copper cabling
The following are basic definitions for the three types of UTP cabling that the
DSR appliance supports:
•
CAT 5 UTP (4-pair) high performance cable consists of twisted pair con-
ductors, used primarily for data transmission. The twisting of the pairs
gives this cable some immunity from the infi ltration of unwanted in ter -
fer ence. 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 signifi cantly 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 ter mi nat ed UTP cable: EIA/TIA 568A and B. These standards apply to
in stal la tions utilizing CAT 5, 5E and 6 cable specifications. The DSR switching
system supports either of these wiring standards. Please refer to the following
table for details.
DSR1021 Switch 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