3Com 5108M-TP manual Seven Basic Network Rules

Table 2-1. Seven Basic Network Rules (Continued)

Rule	Definition	Recommendations/Notes
6	The fiber link distances	In general, on 62.5 micron cable,
	must not exceed the	you can go up to 4000 meters
	limits imposed by the	point-to-point using the ONcore or
	optical power budget.	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	If you are not certain if you have
	bridge.	exceeded allowable network
		distances, use a bridge to extend
		the network.

Designing and Expanding the Network 2 - 5