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Chapter 1: Overview
30
Connector Type The ports are 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 78.
Speed A port’s speed can be 10, 100, or 1000 Mbps. The speed can be set
automatically through Auto-Negotiation, the default setting, or manually
with the Switchblade x3112 Management Software.
Note
To operate at 1000 Mbps, a twisted-pair port is set to Auto -
Negotiation. You cannot set the speed of a twisted-pair port to
1000 Mbps manually.
Duplex Mode A twisted-pair port can operate in either half- or full-duplex mode. (Full-
duplex mode is the only mode available when a port is operating at 1000
Mbps.) The twisted-pair ports are IEEE 802.3u-compliant and Auto-
Negotiate the duplex mode setting.
You can disable Auto-Negotiation on one or all of the switch ports so that
you can set the duplex mode manually through the Switchblade x3112
Management Software.
Note
In order for a switch port to successfully Auto-Negotiate its duplex
mode with a 10 or 100 Mbps end node, the end node should also be
configured for Auto-Negotiation. Otherwise, a duplex mode
mismatch can occur. A switch port using Auto-Negotiation defaults
to half-duplex if it detects that the end node is not using Auto-
Negotiation. This results in a mismatch if the end node is operating
at a fixed duplex mode of full-duplex.
To avoid this problem when connecting an end node with a fixed
duplex mode of full-duplex to a switch port, use the Switchblade
x3112 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).