Cabling Requirements; Twisted-Pair Cable - 3Com 3C905C-TX-M User Manual

82 A
PPENDIX
Environment
Operating 32˚ to 158˚ F (0˚ to 70˚ C)
temperature
Storage
–
temperature
Operating 10 to 90% noncondensing
humidity
Storage 10 to 90% noncondensing
humidity
Altitude
–
Standards Conformance
IEEE 803.3x flow control
Microsoft PC98
PCI 2.1
DMI 1.0 and 2.0

Cabling Requirements

The cable, quality, distance, and connectors must comply with
the Electronic Industries Association/Telecommunications
Industries Association (EIA/TIA) 568 Commercial Building
Wiring Standard and the Technical Services Bulletin
TSB38 standards.

Twisted-Pair Cable

Twisted-pair cable consists of copper wires surrounded by
an insulator. Two wires are twisted together (the twisting
prevents interference problems) to form a pair, and the pair
forms a circuit that can transmit data. A cable is a bundle of
one or more twisted pairs surrounded by an insulator.
Unshielded twisted pair (UTP) is the most commonly used
type of twisted-pair cable. Shielded twisted pair (STP)
provides protection against crosstalk. Twisted-pair cable is
now commonly used in Ethernet, Fast Ethernet, and other
network topologies.
The EIA/TIA defines five categories of unshielded
twisted-pair cable.
A: S
PECIFICATIONS AND
22 to 194˚ F ( 30˚ to 90˚ C)
˚ –
984 ft to 9,840 ft (
C R
ABLING EQUIREMENTS
300 to 3,000 m)
–