Allied-telesis AT-GS900/8E User Manual download pdf (Page 14)

Chapter 1: Product Description

Hardware Feature Description

The below sections describe the hardware features of the AT-GS900/xE

Gigabit Ethernet switch:

 Five or eight 10/100/1000 Mbps twisted pair ports

 System and port LEDs

 DC power jack

10/100Base-TX

Twisted Pair

Ports

The AT-GS900/xE Gigabit Ethernet switch features sixteen twisted pair

ports. The features of the twisted pair ports are explained in the following

sections.

Type of Connector

All twisted pair ports feature 8-pin RJ-45 connectors. (For the port pinouts,

refer to “RJ-45 Twisted Pair Port Connectors” on page 36.)

Speed

The ports are 10Base-T, and 100Base-T compliant and are capable of 10

megabits per second (Mbps), 100 Mbps, and 1000 Mbps speeds. The

ports are IEEE 802.3u Auto-Negotiation compliant. With Auto-Negotiation,

the switch automatically matches the highest possible common speed

between each switch port and each 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.

Duplex Mode

Each twisted pair port on the switch can operate in either half- or full-

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

Auto-Negotiate the duplex mode setting.

Note

In order for the switch to set the duplex mode for each port correctly,

the end-nodes that you connect to the switch ports should also use

Auto-Negotiation. Otherwise, a duplex mode mismatch can occur,

affecting network performance. For further information, refer to

“Duplex Mode” on page 18.

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Allied-telesis AT-GS900/8E User Manual Page 14