Allied Telesis AT-GS920/16, Installation And User Manual

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GS920 Series Gigabit Ehternet Switch Installation and User’s Guide
20
10/100/1000
Base-TX Twisted
Pair Ports
The GS920 Series switches are equipped with multiple
10/100/1000Base-TX twisted pair ports
Connector
All twisted pair ports feature 8-pin RJ-45 connectors. For the port pinouts,
see “RJ-45 Twisted Pair Port Connectors” on page 99.
Speed
The ports are 10Base-T, 100Base-TX, and 1000Base-T compliant and
capable of 10 Mbps, 100 Mbps, and 1000 Mbps speeds. The ports default
configuration is IEEE 802.3u Auto-Negotiation compliant. With
Auto-Negotiation enabled, the switch automatically matches the highest
possible common speed between the switch port and its end-node. For
example, if an end-node is capable of only 10 Mbps, the switch sets the
port connected to the end-node to 10 Mbps.
Alternatively, each port can be manually configured to 10 Mbps, 100
Mbps, and 1000 Mbps via the switches and push buttons. See
“MDI/MDI-X” for the corresponding description of the MDI-X configuration.
Duplex Mode
Each twisted pair port on the switch can operate in either half- or
full-duplex mode at 10/100 Mbps and full-duplex mode only when
operating at 1000 Mbps. The duplex default settings of the twisted pair
ports are IEEE 802.3u-compliant and automatically negotiate the duplex
mode setting.
Note
In order for the switch to automatically set the duplex mode for each
port correctly at 10/100 Mbps, the end-nodes that you connect to the
switch ports also need to be configured for Auto-Negotiation.
Otherwise, a duplex mode mismatch can occur, affecting network
performance. For further information, refer to “Duplex Mode” on
page 27.
With the DIP switches and push buttons, each port can be manually
configured for one of the following duplex modes: Auto-Negotiation,
1000M/Full, 100M/Full, 100M/Half, 10M/Full, 10M/Half.