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Designing and Expanding the Network 2 - 21
In this example, the path between transceivers attached to Concentrators A
and G has the greatest fiber equivalent distance (4240 meters), even
though the link distance is less than the A to H path (3100 meters versus
3200 meters). Because 4240 meters exceeds the 4200 meter maximum,
this configuration is illegal and results in improper network operation.
Because it is not always obvious which path between transceivers has the
highest fiber equivalent distance, use Table 2-8 to help you determine the
equivalent distances.
Table 2-8. Fiber Equivalent Distances Between Transceivers
Path
Total Fiber
Link
Distance
Between
Transceivers
(meters)
Number of
Concentrators
Between
Transceivers
Equivalent
Fiber Distance
of
Concentrators
(meters)
Total
Fiber
Equivalent
Distance
(meters)
A - D 2700 5 950 3650
A - H 3200 5 950 4150
A - G 3100 6 1140 4240
D - H 1700 3 570 2270
D - G 1600 4 760 2360
G - H 2100 4 760 2860