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Fast Ethernet Topology Rules
APPENDIX A
In the next illustration, the network topology is extended to a
maximum distance of 491 meters (1610 feet). In this network, a 160
meter (524 feet) fiber link connects the 100BASE-TX repeater to the
switch, and a 131 meter (429 feet) fiber link connects the 100BASE-
T4 repeater to the switch. 100 meter (328 feet) Category 5 UTP
wiring connects workstations and servers to the repeater stacks. The
100BASE-TX collision domain is 260 meters (852 feet), and the
100BASE-T4 collision domain is 231 meters (757 feet). When the
two collision domains are interconnected through the switch, the
network topology is extended to a total of 491 meters.
If you’re using a 100BASE-FX Uplink Module in a 100BASE-T4
stackable hub, fiber cable length is limited to 131 meters. If you’re
using a 100BASE-FX Uplink Module in a 100BASE-TX stackable
hub, fiber cable length is limited to 160 meters. If a stack combines
100BASE-TX hubs and 100BASE T4 hubs, fiber distance is limited to
131 meters.