3Com 3CR990SVR97, 3CR990-TX-97, 3CR990-TX-95, 3CR990SVR95 manual Auto Select

114CHAPTER 6: CONFIGURING THE NIC

Option	Description (continued)		Settings
Duplex	Determines if the NIC transmits data across		■	AUTO SELECT
	the network in both directions simultaneously		■	Full-Duplex
	(full-duplex) or in one direction at a time
				Half-Duplex
	(half-duplex).		■
	■ Auto Select allows the NIC to automatically
		connect at the duplex mode of the connected
		hub or switch. When you select this setting,
		the Media Type is automatically set to
		Auto Select.
	■	Full-Duplexsets the NIC to operate in
		full-duplex mode. To use this setting,
		the switch that you are connected to must
		support full-duplex. You must also
		manually set the NIC Media Type setting.
	■	Half-Duplexsets the NIC to operate in
		half-duplex mode. You must also set the
		NIC Media Type setting.

Note: If you are running Windows 2000, changes made to the Duplex setting though the 3Com NIC Diagnostics are not reflected in the registry unless you also change the Media Select property setting in Windows 2000:

1.In the Device Manager window, double-click Network adapters.

2.Right-click the 3CR990 NIC and select Properties.

3.Select the Advanced tab.

4.Select Media Select in the property list, and make the appropriate setting change in the Value list.