Allied Telesis AT-8088/xx (MT and SC) - Manual (Page 25)

AT-8000 Series Fast Ethernet Switches Installation Guide
25
10/100/1000Base-T Twisted Pair Ports
The two twisted pair 10/100/1000Base-T ports featured on the AT-8026T
are described below.
Type of
Connector
The ports have 8-pin RJ-45 connectors. The ports use four pins when
operating at 10 or 100 Mbps and all eight pins when operating at
1000 Mbps.
Speed The ports can operate at 10, 100, or 1000 Mbps. The speed is set
automatically through Auto-Negotiation or you can set the speed
manually through the management software.
Duplex Mode The ports can operate in either half- or full-duplex mode. The ports are
IEEE 802.3u compliant and will Auto-Negotiate the duplex mode. If
needed, Auto-Negotiation can be disabled so that you can set the
duplex mode manually through the management software.
Note
In order for a switch port 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. A
switch 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. Consequently, when connecting an end-node
with a fixed duplex mode of full-duplex to a switch port, you should
use the AT-S39 management software to disable Auto-Negotiation
on the port and set the port speed and duplex mode manually.
Maximum
Distance
The ports have a maximum operating distance of 100 meters (328 feet).
Type of Cable For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling. For 100 or 1000 Mbps operation, the
ports require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded
or unshielded twisted pair cabling.