Netgear FE508 Installation Guide - Page 38

Installation Guide for the Model FS508 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 5-1 lists the electrical requirements of Category 5 cable. Table 5-1. 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) NEXT loss (dB minimum) Category 5 Four 100 Ω ± 15% ≤ 5.6 nF per 100 m at 4 MHz: 8.2 at 31 MHz: 11.7 at 100 MHz: 22.0 at 16 MHz: 44 at 31 MHz: 39 at 100 MHz: 32 C-2 Cabling Guidelines