3Com 510M-FBP Example Network with 8 Concentrators, Network Configured With 8 Concentrators

3.Subtract the known amount of fiber cable between the two transceivers:

1 km + 1 km + 1 km = 3 km (Rule 5)

4.The remainder is the maximum allowable distance of the link between Concentrators A and C:

4200 m - 570 m - 3000 m = 630 meters

5.Verify that the optical power budget is able to drive all the link distances in the example. Because all link distances are only 1 km or less, this is not a problem.

Example: Network with 8 Concentrators

Figure 2-7 shows a network with eight connected concentrators. Use this example to determine if the distances between transceivers are all within the 4200 meter maximum network diameter restriction for Ethernet networks.

100m
		500m		1km
	Conc A		Conc E		Conc C
Transceivers						500m
				500m
			Conc D		Conc E		500m	Conc F	400m	Conc G
Transceivers
		100m
						1km			100m
					Conc H				Transceivers

100m

Note: All transceiver connections to concentrators are 100 meters

Figure 2-7. Network Configured With 8 Concentrators

2 - 20 ONline Ethernet 10BASE-FB Module Installation and Operation Guide