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Making Fiber Optic Connections
1. Prepare a pair of fiber-optic cables with SC or ST type connectors at both ends.
SC-Type Connector
2. If you are making a connection to a server or workstation, be sure it that has
a properly installed 100BASE-FX network interface card. Connect the Rx/Tx
jacks on the target device to the Tx/Rx jacks on the switch.
Distance Limit and Power Loss in Fiber Optics
the maximum length between two switches can be up to 2 kilometers.
However, you must consider power loss when calculating the actual length of
cable that can be used with your system. You can calculate power loss with the
following formula:
m = (p dB - i dB)
c dB/km
Note: To determine the power loss incurred by intervening devices and specific cable
type, inquire with the manufacturer. The power budget depends on the gauge of cable
as shown below.
Fast SwitcHub-2se User's Guide
Variable
m
cable length (kilometers)
p dB
power budget
i dB
intervening devices
(e.g., patch cables and splices)
c dB/km
loss per kilometer of cable
Gauge of Fiber Cable
m
50/125
m
m
62.5/125
m
Setup and Configuration
ST-Type Connector
- When using fiber optic cabling,
Description
Power Budget
9.2 dB
13 dB
2-3
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