Allied Telesis AT-FS201 Installation Guide download pdf (Page 19)

AT-FS20x Series Installation Guide

Twisted Pair Port

The AT-FS201, AT-FS202, and AT-FS202SC/FS1 Bridging Media

Converters have one 10Base-T/100Base-TX twisted pair port. The

twisted pair port features a RJ-45 connector.

Port Speed

The twisted pair port is compliant with the 10Base-T and 100Base-TX

standards and is capable of either 10 Mbps or 100 Mbps operation. You

can set the port speed manually or, since the port is IEEE 802.3u Auto-

Negotiation compliant, you can let the converter set the port speed

automatically. With Auto-Negotiation, the speed of the port is set

automatically by the converter after it determines the speed of the end-

node connected to the port. Auto-negotiation is designed to ensure that

the port on the converter and the end-node are operating at the same

speed and that they are communicating at the highest possible common

speed of the devices.

Duplex Mode

Duplex mode refers to how an end-node receives and transmits data. If

an end-node can receive or transmit data, but not both simultaneously,

the end-node is operating in what is referred to as half-duplex mode. If an

end-node can both receive and transmit data simultaneously, the end-

node is said to be operating in full-duplex mode. Naturally, an end-node

capable of operating in full-duplex can handle data much faster than an

end-node that can only operate in half-duplex mode.

The twisted pair ports on the AT-FS201, AT-FS202, and AT-FS202SC/

FS1 Bridging Media Converters can operate in either half-or full-duplex

mode. They are IEEE 802.3u-compliant and use Auto-Negotiation to set

the duplex mode setting for you automatically.

For Auto-Negotiation to operate properly on a converter, the end-nodes

connected to the converter should also use Auto-Negotiation. If an end-

node does not have this feature and has a fixed duplex mode of full-

duplex, the result will be a duplex mode mismatch between the end-node

and a converter port. A port on the converter connected to an end-node

with a fixed duplex mode of full-duplex will operate at only half-duplex.

This results in the end node using full-duplex and the switch port using

half-duplex. This can produce network performance problems. Should

you encounter this situation, you must configure the port on the end-node

to use Auto-Negotiation or, if it lacks that feature, to half-duplex.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 87 88

No comments

Allied Telesis AT-FS201 Installation Guide Page 19