IBM 704 manual Fast Ethernet Cabling, Fast Ethernet Hubs, Configuring for Full-Duplex

Configuring the 100/10 PCI Ethernet Adapter

Configuring for Full-Duplex

If you have a hub that does not support auto-negotiation, manually configure the adapter for full-duplex support. Configuration is specific to the driver that you are loading for your network operating system. Refer to Table 1.

Note: You must set the adapter speed when configuring for full-duplex support. Do not leave the speed set to auto-negotiate.

Driver	How To Set Duplex Mode
Windows NT	Define the Setup program:
Server 3.51	1.	Click Network on the Control Panel
	2.	Click Configure. The Setup program runs.
	3.	Click Change. Set the speed to 100 Mbps or 10 Mbps.
	4.	Click Advanced. Set Duplex to Full.
Other Network	See the README file. To view the README files, insert
Operating	the Ethernet Configuration and Drivers diskette, and type
Systems	SETUP \README at the DOS prompt. Then, press Enter.

Table 1. Setting Duplex Mode

Fast Ethernet Cabling

The 100BASE-TX specifications support 100 Mbps transmission over two or four pairs of twisted-pair Ethernet cabling. In two pair cabling, one pair of cables is used for transmission, and the second is used for reception and collision detection.

Because a 125 MHz frequency is used on the wire, 100BASE-TX uses

Category 5 cabling.

Segment lengths are limited to 100 meters (328 feet) with 100BASE-TX for signal timing reasons.

Fast Ethernet Hubs

New hubs are available to support a variety of Fast Ethernet LAN configurations. These hubs can be divided into two basic types: shared and switched. 100/10 PCI Ethernet adapters can be used with either type of hub for 10 Mbps or 100 Mbps operations.

70PC Server 704 User's Handbook