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Installing the Series 4100gl Switches
Installation Procedures
Port Type
Cable Type
Gigabit-SX
Multimode fiber-optic cables fitted with LC
(on Gigabit-SX-LC
connectors
mini-GBIC)
Gigabit-LX
Single-mode fiber-optic cables fitted with LC
(on Gigabit-LX-LC
connectors.
mini-GBIC)
The multimode cables specified for the Gigabit-
SX mini-GBIC may also be used, but a mode-
conditioning patch cord may be needed — See
the Installation Guide that came with your
module for more information.
Gigabit-LH
The same single-mode fiber-optic cables as for
(on Gigabit-LH-LC
Gigabit-LX.
mini-GBIC)
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:
2-6
Fiber Optic Cables
In the front of the switch, allow at least 7.6 cm (3 inches) of space for the
twisted-pair and fiber-optic cabling.
In the back of the switch, allow at least 10.2 cm (4 inches) of space for the
power cord and cooling.
On the sides of the switch, leave at least 7.6 cm (3 inches) for cooling.
Length Limits
220 meters to 550 meters depending on the
cable used. See "Fiber-Optic Cables" on
B-3
for more information.
• single-mode cable = 10 kilometers
• multimode cable = 550 meters
• 70 kilometers
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