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Fiber Optic Cable Length Limitations
The 10BASE-F standard permits you to use fiber optic cables up
to 2000 meters long. However, the fiber connection must meet
the following criteria:
• Optical power budget (shown in Table 3)
• Ethernet repeater rules
For more information about simple rules for Ethernet network
compliance, refer to
Using the BayStack 10BASE-T Hubs
.
The optical power budget is shown in Table 3. Power loss in the
link cannot exceed the value for the type of fiber optic cable you
are using.
Only in-line fiber-to-fiber connections (a connection between
two fibers terminated with fiber connectors, using a fiber-to-fiber
connector) count against the optical power budget. The loss in a
fiber connection at the ends of the link are included in the optical
power budget and does not count as an in-line connection.
Table 3. 10BASE-FL RDN Media Adapter Power Budget
Parameter 62.5/125
µ
m 50/125
µ
m
Transmitted power (average) –20 dBm –25.7 dBm
Receiver sensitivity (average) –32.5 dBm –32.5 dBm
Optical power budget 12.5 dB 6.8 dB