D-Link DFE-908 User Guide - Page 31

Dual-Speed Stackable Hubs User's Guide ♦ The maximum length of a twisted-pair cable segment is 100 meters. Cabling should be Category 3 or better. ♦ Between any two end-stations in a collision domain, there may be up to five cable segments and four intermediate repeaters (hubs, hub stacks, or other repeaters). ♦ If there is a path between any two end-stations containing five segments and four repeaters, then at least two of the cable segments must be point-to-point link segments (e.g., 10BASE-T, 10BASEFL), while the remaining segments may be populated (mixing) segments (e.g., 10BASE-2 or 10BASE-5). Fast Ethernet (100Mbps) networks need to respect the following connectivity rules: ♦ The maximum length of a twisted-pair segment (that is, the distance between a port in the hub to a single-address network device such as a PC, server, or Ethernet switch) is 100 meters. Cabling and other wiring should be certified as Category 5 or shielded twisted pair (STP). ♦ The maximum diameter in a collision domain is about 205 meters using two Class II hubs (or hub stacks). ♦ Between any two end-stations in a collision domain, there may be up to three cable segments and two Class II hubs or hub stacks. Hub to End-Station Connection After the hub properly installed, it can support up to eight end-station connections. Fast Ethernet connection requires either a Category 5 UTP cable or an STP cable. These cables can be up to 100 meters long. Making Connections 19