HP J4903A User Manual - Page 24

Installing the Switch Installing the Switch Installation Procedures Port Type Gigabit-SX (on Gigabit-SX-LC mini-GBIC) Gigabit-LX (on Gigabit-LX-LC mini-GBIC) Cable Type Length Limits Fiber Optic Cables Multimode fiber-optic cables designed for Gigabit Ethernet: 62.5/125 µm or 50/125 µm (core/cladding) diameter, low metal content, graded-index cables, fitted with LC connectors. The cables must comply with the ITU-T G.651 and ISO/IEC 793-2 Type A1b or A1a standards. • 62.5 µm cable: - 160 MHz*km = 220 meters - 200 MHz*km = 275 meters • 50 µm cable: - 400 MHz*km = 500 meters - 500 MHz*km = 550 meters Single-mode fiber-optic cables designed for Gigabit Ethernet: 9/125 µm (core/cladding) diameter, 1310 nm, low metal content cables, fitted with LC connectors. The cables must comply with the ITU-T G.652 and ISO/IEC 793-2 Type B1 standards. • single-mode cable = 5 kilometers • multimode cable = 550 meters Gigabit-LH (on Gigabit-LH-LC mini-GBIC) The multimode cables specified for the GigabitSX mini-GBIC may also be used, but a modeconditioning patch cord may be needed - see "Mode Conditioning Patch Cord for Gigabit-LX" on page B-3 for more information. Single-mode fiber-optic cables designed for • single-mode cable = 70 kilometers Gigabit Ethernet and fitted with LC connectors. ■ Installation Location - Before installing the switch, plan its location and orientation relative to other devices and equipment: • In the front of the switch, leave at least 7.6 cm (3 inches) of space for the twisted-pair and fiber-optic cabling. • In the back of the switch, leave at least 3.8 cm (1 1/2 inches) of space for the power cord. • On the sides of the switch, leave at least 7.6 cm (3 inches) for cooling, except if the switch is installed in an open EIA/TIA rack. 2-6