3Com Switches/Hub manual Fast Ethernet

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O F F I C E C O N N E C T ® SWITCHES AND HUBS

Fast Ethernet

Fast Ethernet is based on the Ethernet standard yet runs at 10 times the speed (100 Mbps). It is now one of the most popular high-speed technologies because of its cost effectiveness, stability, and compatibility with existing Ethernet LAN environments. Fast Ethernet switching allows dedicated performance between two devices.

The total length of cable (A+B+C below) between two workstations and a nonrepeater piece of equipment (such as a switch) must not exceed 205 m (672 ft). Each cable (A, B, or C) must not exceed 100 m (328 ft).

3Com recommends using Category 5 cables and that the cable (B) between the Fast Ethernet hub is not longer than 5 m (16.4 ft). This allows the maximum hub-to-workstation cable length (A or C) of 100 m (328 ft) to be used, as shown.

100 Mbps link

Switch

A

 

Example:

 

 

 

 

 

100 m

 

 

 

(328 ft)

station

 

station

 

Work

 

Work

 

 

 

 

 

 

5 m

 

B

 

 

(16.4 ft)

ub

 

ual

Speed

 

H

C

 

 

 

D

8

 

 

 

ub

 

 

 

H

 

 

 

ub

 

 

Mbps

 

H

 

100

 

 

 

 

 

 

 

hub

 

 

station

 

 

 

Work

 

 

 

These rules do not

 

apply to Fast

 

Ethernet switches.

 

You can connect

 

as many

 

OfficeConnect

 

switches together

100 m

as your business

(328 ft)

requires.

station Work

3

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