Bay Networks BayStack 893-862-B Using Manual page 6

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:
• Optical power budget
• Ethernet repeater rules
For more information about simple rules for Ethernet network
compliance, refer to Using the BayStack 10BASE-T Hubs.
BayStack 10BASE-FL Media Adapter
The optical power budget for the 10BASE-FL media adapter is
shown in Table
for the type of fiber optic cable you are using.
Table 1. 10BASE-FL Optical power budget
Parameter
Transmitted power (average)
Receiver sensitivity (average)
Optical power budget
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 is included in the optical
power budget and does not count as an in-line connection.
4
1. Power loss in the link cannot exceed the value
62.5/125 m
–20.0 dBm
–32.5 dBm
12.5 dB
50/125 m
–25.7 dBm
–32.5 dBm
6.8 dB
893-862-B