HP J9087A User Manual - Page 26

Installing the Switch Installing the Switch Installation Procedures Port Type Cable Type Length Limits Fiber Optic Cables Gigabit-SX (on Gigabit-SX-LC mini-GBIC) Multimode fiber-optic cables fitted with LC connectors 220 meters to 550 meters depending on the cable used. See "Fiber-Optic Cables" on page B-2 for more information. Gigabit-LX (on Gigabit-LX-LC mini-GBIC) Single-mode fiber-optic cables fitted with LC connectors. • single-mode cable = 10 kilometers • multimode cable = 550 meters 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. Gigabit-LH (on Gigabit-LH-LC mini-GBIC) The same single-mode fiber-optic cables as for • 70 kilometers Gigabit-LX. Note: Gigabit-LH - Between the transmit and receive ends of the cable, at least 5db of attenuation is required for a reliable connection. This is equivalent to 20Km of the fiber-optic cable. For distances less than 20Km, you must add attenuators to bring the total attenuation to at least 5db. Most cable vendors carry attenuators. ■ 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. 2-6