| | AT-FS20x Series Installation Guide |
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LED | Color | Description | |
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100M | Green | The twisted-pair port is operating at 100 Mbps. | |
| OFF | The twisted-pair port is operating at 10 Mbps. | |
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FD/COL | Green | The switch is operating in full-duplex mode. | |
| OFF | The switch is operating in half-duplex mode. | |
| Blinking | A collision has been detected on the port. | |
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AUTO | Green | Auto-Negotiation on the twisted-pair port is enabled. | |
NEG | OFF | Auto-Negotiation on the twisted-pair port is disabled. | |
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Twisted-Pair Port
The AT-FS20x and AT-FS202SC/FSx Series switches have one 10Base-T/ 100Base-TX twisted-pair port. The twisted-pair port features an RJ-45 connector.
Port Speed
The twisted-pair port is compliant with the 10Base-T and 10Base-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 allow the switch to set the port speed automatically. With Auto-Negotiation, the speed of the port is set automatically by the switch after it determines the speed of the end-node connected to the port. Auto- Negotiation ensures that the port on the switch 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 the way an end-node sends and receives data on the network. An end-node can operate in either half- or full-duplex mode, depending on its capabilities. An end-node that is operating in half-duplex mode can either send data or receive data, but it cannot do both at the same time. An end-node that is operating in full-duplex mode can send and receive data simultaneously. The best network performance is achieved when an end- node can operate at full-duplex, since the end-node is able to send and receive data simultaneously.
