Installation guide

SwitchBlade x8112 Chassis Switch Installation Guide

10/100/1000Base-T Twisted Pair Ports

This section applies to the 10/100/1000Base-T ports on the AT-

SBx81GT24 and AT-SBx81GP24 PoE Ethernet Line Cards.

Connector Type The ports have 8-pin RJ-45 connectors. The ports use four pins at 10 or

100 Mbps and all eight pins at 1000 Mbps. The pin assignments are listed

in “Connectors and Port Pinouts” on page 167.

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 SwitchBlade x8112 Management Software.

Note

Twisted-pair ports have to be set to Auto-Negotiation to operate at

1000 Mbps. You cannot manually set twisted-pair ports to 1000

Mbps.

Duplex Mode The twisted-pair ports can operate in either half- or full-duplex mode at 10

or 100 Mbps. Ports operating at 1000 Mbps can only operate in full-duplex

mode. The twisted-pair ports are IEEE 802.3u-compliant and Auto-

Negotiate the duplex mode setting.

You can disable Auto-Negotiation on the ports and set the duplex mode

manually.

Note

Switch ports that are connected to 10 or 100 Mbps end nodes that

are not using Auto-Negotiation should not use Auto-Negotiation to

set their speed and duplex mode settings, because duplex mode

mismatches might occur. You should disable Auto-Negotiation and

set the speed and duplex mode settings manually with the

SwitchBlade x8112 Management Software.

Maximum

Distance

The ports have a maximum operating distance of 100 meters (328 feet).