3Com 3C16751A manual Example, Ethernet 10Mbps Configuration Rules

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

Switch	A	B	C	100Mbps
				link

Hub Hub

WorkstationWorkstation

Example:

100m (328ft)		5m (16.4ft)	100m (328ft)
	Dual	100Mbps
Workstation	Speed	Hub	Workstation
	Hub 16

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

Example:			10Mbps
			link
Switch
10Mbps	Dual	10Mbps	10Mbps
Hub	Speed	Hub	Hub
Workstation	Hub 16		Workstation

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