Installation Guide for the Model FS518 Fast Ethernet Switch
C-2
Cabling Guidelines
Category 5 Cable
Category 5 distributed cable that meets ANSI/EIA/TIA-568-A building wiring standards can be
a maximum of 328 feet (ft) or 100 meters (m) in length, divided as follows:
•
20 ft (6 m) between the hub and the patch panel (if used)
•
295 ft (90 m) from the wiring closet to the wall outlet
•
10 ft (3 m) from the wall outlet to the desktop device
The patch panel and other connecting hardware must meet the requirements for 100 Mbps
operation (Category 5). Only 0.5 inch (1.5 cm) of untwist in the wire pair is allowed at any
termination point.
Category 5 Cable Specifications
Ensure that the fiber cable is crossed over to guarantee link.
Table C-1
lists the electrical requirements of Category 5 UTP cable.
Table C-1.
Electrical Requirements of Category 5 Cable
Specification
Category 5 Cable Requirements
Number of pairs
Four
Impedance
100
Ω
±
15%
Mutual capacitance at 1 KHz
≤
5.6 nF per 100 m
Maximum attenuation (dB per 100 m, at 20
°
C) at 4 MHz: 8.2
at 31 MHz: 11.7
at 100 MHz: 22.0
NEXT loss (dB minimum)
at 16 MHz: 44
at 31 MHz: 39
at 100 MHz: 32
Содержание FS518T FS518T FS518T
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