Allied-telesis AT-MR815T Uživatelský manuál stáhnout pdf (Strana 37)

AT-MR415T and AT-MR815T Installation Guide

5 - 4 - 3 Rule

In addition to IEEE requirements, Table 4 and Table 5, follow the “5-4-3 rule”

to ensure that your conﬁguration does not exceed the maximum 10Base-T data

transmission path (the longest path through any given network).

The 5-4-3 rule describes the maximum path between any two devices or nodes

(PCs or other stations) on the network. There can be:

❑ Up to five segments in series

❑ Up to four repeaters or multiport hubs

❑ Up to three populated segments (that is, segments attached to two or

more PCs)*

* The remaining two segments are unpopulated; these are known as inter-

repeater links or IRLs. This distinction between populated and unpopulated

segments is signiﬁcant for coaxial cable networks only.

Note

This rule is completely consistent with the IEEE 802.3 speciﬁcation,

and is meant only to summarize the conﬁguration speciﬁcation.

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Allied-telesis AT-MR815T Uživatelský manuál Strana 37