3Com 5124M-TP Switch User Manual


 
Designing and Expanding the Network 2 - 5
6 The fiber link distances
must not exceed the
limits imposed by the
optical power budget.
In general, on 62.5 micron cable,
you can go up to 4000 meters
point-to-point using the ONcore or
ONline Fiber Modules. If you have
poor quality cable or cross many
patch panels, you may have to
sacrifice some distance.
Some older Ethernet fiber optic
products are less powerful than
ONcore Fiber Module optics. So
when connecting to these
products, remember that the least
powerful device determines the
maximum point-to-point distance.
7 When in doubt, use a
bridge.
If you are not certain if you have
exceeded allowable network
distances, use a bridge to extend
the network.
Table 2-1. Seven Basic Network Rules (Continued)
Rule Definition Recommendations/Notes