3Com 5102M-FBP, 5104M-FB1, 510M-FBP Definition Recommendations/Notes

Table 2-1.	Basic Network Rules (Continued)
Rule		Definition	Recommendations/Notes
2		Wire the backbone in a	The star topology conforms to
(con’t)		star topology to isolate	FDDI wiring. Run at least two
		faults.	fiber strands to each backbone
			connection.
3		Do not exceed the	The 4200 meters is the
		maximum Fiber Ethernet	maximum distance between
		network diameter of	any two transceivers on the
		4200 meters of fiber	network.
		cable.
			The 4200 meters does not
			include the transceiver cable
			that connects a device with an
			external transceiver.
			Transceiver cable can extend up
			to 50 meters. Thus, total
			network diameter can be as
			much as 4300 meters (4200 m +
			2 * 50 m) between any two
			modes.
4		Certain LAN products	Each microsecond delay
		on the network shrink	through a device on the
		the maximum Fiber	network shrinks the network
		Ethernet network	diameter by approximately 200
		diameter to less than	meters of fiber cable. This
		4200 meters.	reduction is known as
			equivalent distance. Table 2-2
			lists the equivalent fiber
			distances for 3Com ONline LAN
			products.

Designing and Expanding the Network 2 - 3