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 1. Power loss in the link cannot exceed the value for the type of fiber optic cable you are using.
Table 1. 10BASE-FL Optical power budget
Parameter | 62.5/125 ∝m | 50/125 ∝m |
| | |
Transmitted power (average) | –20.0 dBm | –25.7 dBm |
Receiver sensitivity (average) | –32.5 dBm | –32.5 dBm |
Optical power budget | 12.5 dB | 6.8 dB |
| | |
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.
