3Com 3824 Implementation Guide - Page 75

A CONFIGURATION RULES Configuration Rules for Gigabit Ethernet Gigabit Ethernet is designed to run over several media: ■ Single-mode fiber optic cable, with connections up to 5 km (3.1 miles). Support for distances over 5 km is supported depending on the module specification. ■ Multimode fiber optic cable, with connections up to 550 m (1804 ft). ■ Category 5 cabling, with connections up to 100 m (328 ft). The different types of Gigabit Ethernet media and their specifications are detailed in Table 10. Table 10 Gigabit Ethernet cabling Gigabit Ethernet Transceivers 1000BASE-LX 1000BASE-SX 1000BASE-T Fiber Type 62.5 µm MM 50 µm MM 50 µm MM 10 µm SM 62.5 µm MM 62.5 µm MM 50 µm MM 50 µm MM N/A Modal Bandwidth (MHz/km) 500 400 500 N/A 160 120 400 500 N/A Lengths Supported Specified by IEEE (meters) 2-550 2-550 2-550 2-5000 2-220 2-275 2-500 2-550 100 MM = Multimode SM = Single-mode