3Com 5104M-FB1, 5102M-FBP, 510M-FBP Example Network With 3 Concentrators

Network Distance Calculation Examples

The following examples demonstrate how to calculate network distances for various all-fiber networks.

Example: Network With 3 Concentrators

Figure 2-6 shows a network with 3 concentrators.

Figure 2-6. Network With 3 Concentrators

To determine the maximum allowable link distance between Concentrators A and C:

1.Use 4200 m as the maximum network diameter for a pure fiber network as defined by the 802.3 specification. (Rule 3).

2.Subtract the fiber equivalent of the three concentrators with 10BASE-FB Modules that occur on the path between the two transceivers:

3 * 190 meters = 570 meters (Rule 4)

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