3Com 5104M-FL1 installation and operation guide Designing and Expanding the Network 2

Note: In the reverse direction, a signal originating at Transceiver A loses 165 m of fiber equivalent distance when it exits the 10BASE-T Module to which Transceiver B is connected and

330meters for the signal entering the 10BASE-FL Module in the bottom concentrator. The overall fiber equivalence of the path is greater for signals going from Transceiver B to A, however, the B to A fiber equivalence determines whether the link meets the 4200 m Ethernet link maximum.

5.Subtract the sum of intervening cable lengths:

185 m + 50 m + 200 m + 1500 m + 100 m = 2035 m

6.The remainder is:

4200 m - 420 m - 230 m - 560 m - 800 m - 2035 m = 155 m

Because the remaining value is greater than zero, the configuration in Figure 2-9 is legal.

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