Allied Telesis AT-9448Ts/XP (Basic Layer 3) - Manual (Page 17)

AT-9400Ts Stack Installation Guide
17
10/100/1000Base-T Twisted Pair Ports
This section describes the twisted pair ports on the switches.
Connector Type
The ports have 8-pin RJ-45 connectors that use four pins at 10 or 100
Mbps and all eight pins at 1000 Mbps. For the pin assignments, refer to
“RJ-45 Twisted Pair Port Pinouts” on page 101.
Speed The ports can operate at 10, 100, or 1000 Mbps. The speeds can be set
automatically through Auto-Negotiation, the default setting, or manually
with the AT-S63 Management Software.
Note
Twisted pair ports must use Auto -Negotiation to operate at 1000
Mbps. They cannot be manually set to 1000 Mbps.
Duplex Mode
The twisted pair ports can operate at 10 or 100 Mbps in either half- or full-
duplex mode. (Ports that are operating at 1000 Mbps use only full-duplex
mode.) The twisted pair ports are IEEE 802.3u-compliant and can set the
duplex modes through Auto-Negotiation. You can disable Auto-
Negotiation on the switch ports and set the duplex modes manually
through the AT-S63 Management Software.
Note
Ports that are using Auto-Negotiation to set their duplex modes
should be connected to end nodes that are also using Auto-
Negotiation. Otherwise, duplex mode mismatches can occur.
Twisted pair ports that are using Auto-Negotiation default to half-
duplex mode if they detect that the end nodes are not using Auto-
Negotiation. If the end nodes are operating at a fixed duplex mode of
full-duplex, the ports and the end nodes will operate at different
duplex modes, which can reduce network speed and efficiency.
To avoid a duplex mode mismatch when connecting an end node
with a fixed duplex mode of full-duplex to a switch port, use the
AT-S63 Management Software to disable Auto-Negotiation on the
port and to set the port speed and duplex mode manually.
Maximum
Distance
The ports have a maximum operating distance of 100 meters (328 feet).