Cable Lengths; Cable Specifications; Table C-1. Electrical Requirements Of Category 5 Cable - NETGEAR FS516 Installation Manual

Installation Guide for the Model FS516 Fast Ethernet Switch

Cable Lengths

Category 5 distributed cable that meets ANSI/EIA/TIA-568-A building wiring standards can be
a maximum of 328 feet (100 meters) in length, divided as follows:
• 20 feet (6 meters) between the hub and the patch panel (if used)
• 295 feet (90 meters) from the wiring closet to the wall outlet
• 10 feet (3 meters) 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.
Cable Specifications
Table C-1 lists the electrical requirements of Category 5 cable.
Table C-1. Electrical Requirements of Category 5 Cable
Specification
Number of pairs
Impedance
Mutual capacitance at 1 KHz
Maximum attenuation (dB per 100 m, at 20 C) at 4 MHz: 8.2
NEXT loss (dB minimum)
C-2
Category 5 Cable
Four
100 15%
5.6 nF per 100 m
at 31 MHz: 11.7
at 100 MHz: 22.0
at 16 MHz: 44
at 31 MHz: 39
at 100 MHz: 32
Cabling Guidelines