3com 3C16751A Benutzerhandbuch

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3Com recommends that the cable (B) between the Fast 
Ethernet hubs is no longer than 5m (16.4ft). This allows the 
maximum hub-to-workstation cable length (A or C) of 100m 
(328ft) to be used, as shown in Figure 3.
Figure 3   Configuration Rules and Example of a Fast Ethernet 
(100Mbps) Network
Ethernet (10Mbps) Configuration Rules
You can connect a maximum of four Ethernet (10Mbps) 
hubs in series between workstations, or between a 
workstation and a non-repeater piece of equipment (such as 
a switch). Each cable must not exceed 100m (328ft). An 
example is shown in Figure 4.
Figure 4   Example of an Ethernet (10Mbps) Network
5m (16.4ft)
100m (328ft)
100m (328ft)
Dual
Speed
Hub 16
100Mbps
Hub
Example:
B
C
A
Hub
Hub
Workstation
Workstation
Workstation
Workstation
Switch
100Mbps
link
Dual
Speed
Hub 16
10Mbps
Hub
10Mbps
Hub
10Mbps
Hub
Workstation
Workstation
Switch
10Mbps
link
Example:
3C16751_booklet.book  Page 12  Tuesday, July 13, 1999  11:29 AM