Allied Telesis AT-FS705LE - Manual (Page 20)

Overview
8
Each twisted pair port on the AT-FS705LE
switch can operate in either half-duplex or full-
duplex mode. Since these twisted pair ports are
IEEE 802.3u-compliant, the duplex mode can
be set automatically through Auto-Negotiation.
With Auto-Negotiation, if the end-node is
capable of full-duplex, the port is set
automatically to full-duplex mode. If the end-
node is capable of half-duplex, the port is set
automatically to half-duplex mode.
Note
In order for the twisted pair port on the
AT-FS705LE switch to successfully Auto-
Negotiate its duplex mode with an end-
node, the end-node should also be using
Auto-Negotiation. Otherwise, a duplex
mode mismatch can occur. The twisted
pair port, using Auto-Negotiation, will
default to half-duplex if it detects that
the end-node is not using Auto-
Negotiation. This will result in a
mismatch if the end-node is operating at
a fixed duplex mode of full-duplex.