PCI 100Base-T Network Adapter Installation and Service Guide (32650-90904)

8 Chapter1
PCI 10/100Base-TX/3000 Quick Installation
Notes on Autonegotiation and Autosensing
If the PCI 10/100Base-TX/3000 card or the Core I/O card LAN port is
connected to a device that does not support autonegotiation or a device
that has autonegotiation disabled, the PCI card will autosense the
speed of the link and set itself accordingly. The duplex mode of the card
may be set to half-duplex in this case. If you want the card to operate in
full-duplex mode, you must set it using the method described in “Notes
on Manual Speed and Duplex Mode Configuration” in this document.
The PCI 10/100Base-TX card or the Core I/O card LAN port will sense
when the connection between itself and a hub or switch on the other
end of a link has been broken. If a connection is made to another (or the
same) device and autonegotiation is enabled, the autonegotiation and
autosensing process will be done again automatically. Autonegotiation
and autosensing are also done whenever the interface is reset.