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LAN Connector and Cables 167
To create a valid collision domain diameter, you must adhere to the
following maximum cable span lengths along with the collision domain
diameter guidelines in Table 22:
■ UTP (running TX or T4) — Maximum cable span length is ≤100 m.
■ Fiber (running FX) — Maximum cable span length is ≤412 m.
Figure 21 shows examples of collision domain diameters.
Figure 21 Collision Domain Diameter Examples
To determine a valid collision domain diameter, follow these steps:
1 Determine which interfaces will be used: TX, FX, or T4.
2 Add up the combined length of all cabling to be used.
3 Determine which class of repeaters, if any, are used in the collision
domain diameter.
4 Determine the maximum cable length by referring to Table 23, which
contains cabling and repeater guidelines for three scenarios shown in
Figure 22, Figure 23, and Figure 24.
Collision domain
diameter 1
Collision domain
diameter 2
Collision domain
diameter 3
SuperStack II
NETBuilder
Fast Ethernet Repeater
Fast Ethernet Repeater
End Stations
DTE device
DTE device
DTE device
DTE
device
SuperStack II
NETBuilder