Dual-Speed Stackable Hubs User’s Guide
FL), while the remaining segments may be populated (mixing) seg- ments (e.g., 10BASE-2 or 10BASE-5).
Fast Ethernet (100Mbps) networks have 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 UTP or shielded twisted- pair (STP).
♦The maximum diameter in a collision domain is approximately 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 installing the hub properly, it can support up to sixteen (DFE- 916x/DFE-916) end-station connections. Fast Ethernet connections require either a Category 5 UTP cable or an STP cable. These cables can be up to 100 meters long.
Each Ethernet connection requires a Category 3 or better UTP cable. It is recommended that you use Category 5 cabling for all connections, in order to make it easier to transition all stations to 100Mbps.
You can connect any combination of PCs, servers, and other single-address network devices to the twisted-pair ports using straight-through twisted-pair cables. These cables should not be crossed over. The following figure il- lustrates the pin assignments for a straight-through cable:
