Appendices
50 590-591-609B
5.2.2.2 Virtual media restrictions
The following list specifies restrictions for using virtual media:
• The KVM s3-1621 and KVM s3-1641 virtual media appliances support only the
connection of USB 2.0 diskette drives, Flash drives, and CD drives.
• The KVM s3 Client supports only mapping of USB 2.0 and USB 1.1 diskette drives
and Flash drives connected to theclient computer.
5.3 UTP cabling
The following information is intended to brief you on various aspects of connection
media. The performance of a switching system depends on high quality connections.
Poor quality or poorly installed or maintained cabling can diminish system
performance.This appendix is for information purposes only. Consult w ith th e loca l cod e
officials or cabling consultants prior to any installation.

5.3.1 UTP copper cabling

Switching systems use unshielded twisted pair (UTP) cabling.The following are basic
definitions for the three types of UTP cabling that the KVM s3-1621 and KVM s3-1641
appliances support:
• 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 ca ble some
immunity from the infiltration of unwanted interference. Cat 5 cable is generally
used for networks running at 100 or 1000 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 re quirements than Cat 5E cable. Cat 6 has
higher measured frequency ranges and significantly better performance
requirements than Cat 5E cable at the same frequencies.