Installation Guide for the Model FE508 and Model FE516 Fast Ethernet Hubs
Fast Ethernet and Cabling Guidelines
C-3
Cable Specifications
Table C-1 lists the electrical requirements of the Category 5 cable.
Table C-1. Electrical requirements of Category 5 cables
Specification
Category 5
Number of pairs
Two or 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 16 MHz: 8.2
at 31 MHz: 11.7
at 100 MHz: 22
NEXT loss (dB minimum)
at 16 MHz: 44
at 31 MHz: 39
at 100 MHz: 32
