# Tips and Tricks

## General discussion

• Creator
Topic
• #2128248

### A simple diagram

Locked

by airwolf171 Â·

How would you design a simple diagram to show how the 5-4-3 rule really works?

• Author
Replies
• #3418732

### A simple diagram

by ann777 Â·

In reply to A simple diagram

What’s wrong with the diagram here?

http://www.helmig.com/j_helmig/netrule.htm

Which I gave you before (and you rejected my answer)? That’s how it really works.

• #3418731

### A simple diagram

by ann777 Â·

In reply to A simple diagram

Well, you didn’t actually rate my previous answer. There’s nothing that you can diagram with any more detail to show how it really works.

You must have a:
– minimum 0.5 m between T-connectors
– maximum 185 m cable length
– maximum of 30 nodes (i.e. connections)

An cable can be extended by installing Repeaters, which amplify the signal…

A Repeater counts on each segment as a node and can be connected at ANY location in the Thin-Ethernet cable…

However, if a network needs more than 2 repeaters…

the following limitations apply:

When an Ethernet signal travels from its source to destination station, it can travel through:
– maximum of 5 segments
– maximum of 4 Repeaters/hubs
– maximum of 3 populated segments
(Populated segments have more than 2 nodes connected, un-populated segments have only a node at each end, so a 10baseT-segments is a non-populated segment).

And for this discussion, a 10BaseT-Hub is like a repeater and a 10baseT cable can be treated as a cable 10base2-cable with just 2 systems on it.

There can be more repeaters/hubs in the complete network, and an Ethernet signal can pass-by more than 4 Repeaters/hubs, as long it does not have to go THROUGH more than 4 Repeaters/hubs.
If these rules are violated, the network becomes unreliable.

• #3419858

### A simple diagram

by airwolf171 Â·

In reply to A simple diagram

• #3419923

### A simple diagram

by timthetoolman Â·

In reply to A simple diagram

Hi,

I think Anna’s answer is a good one, but if you want an explanation in terms of propogation delays and round trip times… ie. a full and complete description in terms of electrical properties, then the following page give you all the information you could ever want…

It even dispells some myths about what the 5-4-3 rule really means…

http://www.ots.utexas.edu/ethernet/ch13-ora/ch13.html

(remove spaces from the above URL)

Cheers,
Tim.

• #3419859

### A simple diagram

by airwolf171 Â·

In reply to A simple diagram