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3-2 © 2003 Foundry Networks, Inc. February 2003
Application Example
This switch is specifically designed for delivering Internet access
to individual users in multi-dwelling or multi-tenant units
(MDUs/MTUs), such as apartment housing blocks, commercial
buildings or hotels. Some features of this application are
described below.
Connectivity Rules
When adding hubs (repeaters) to your network, please follow the
connectivity rules listed below for Ethernet, Fast Ethernet, or
Gigabit Ethernet. However, note that because switches break up
the path for connected devices into separate collision domains,
you should not include the switch or connected cabling in your
calculations for cascade length involving other devices.
1000 Mbps Gigabit Ethernet Collision Domain
Maximum Fiber Optic Cable Distance for 1000BASE-SX
Maximum Fiber Optic Cable Distance for 1000BASE-LX
Fiber Size Fiber Bandwidth Maximum Cable Length
62.5/125 micron 160 MHz/km 2-220 m (7-722 ft)
200 MHz/km 2-275 m (7-902 ft)
50/125 micron 400 MHz/km 2-500 m (7-1641 ft)
500 MHz/km 2-550 m (7-1805 ft)
Fiber Size Fiber Bandwidth Maximum Cable Length
9/125 micron N/A 2 m - 5 km (7 - 16404 ft)