Cabletron Systems 24 User Manual

Cable SpecificationsPage 2-3• Where practical, dedicated cable should be used for Token Ringsignals.• Work area wall plates and outlets used for the Token Ring networkshould be clearly labeled as Token Ring network lobe connections.2.2 Cable SpecificationsTake care in planning and preparing the cabling and connections for thenetwork. The susceptibility of the LAN’s cables to crosstalk and noisedetermines the network’s error rate, and thus, the reliability of datapropagation on the network. The quality of the connections, the length ofcables and other conditions of the installation are critical factors indetermining the reliability of the network.2.3 UTP Cabling SpecificationsBoth UTP supporting modules (STH-22 / 24) support D-inside wiring(DIW) voice grade Unshielded Twisted Pair (UTP) cable as describedbelow and in EIA SP-1907B. All category 5, all category 4, and some (seeSection 2.3.2, UTP Lobe Lengths, on page 5) category 3 UTP cablesmeet Token Ring network performance requirements.2.3.1 UTP Cable CategoriesBoth UTP concentrator modules (STH-22 / 24) support UTP cablesclassified as category 3, 4, and 5.UTP cable is categorized according to the following specifications: