Accton Technology 12se manual Shows if the port has been isolated from the network

Fast EtherHub-12se User’s Guide

Port Status Display

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Color:	Red
Label:	Partition
Function:	Shows if the port has been isolated from the network

Condition

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Indication

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A port is temporarily partitioned when a line error or too many collisions are detected on the attached segment. While it is automatically partitioned, the port continues to receive data from the segment. However, data is not transmitted onto the segment. When the problem is corrected or a valid data packet is received through the port, the port is automatically reconnected. When partitioning occurs, the port’s corresponding Partition LED will be continually lit (RED light). Otherwise, this LED should be OFF (unlit).

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Color:	Green
Label:	Link
Function:	Indicates a valid network connection associated with the port.

Condition

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Indication

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Troubleshooting: If the Link LED does not light up when a device is connected to its corresponding port, check that both the hub and connected device are powered on. Be

sure the cable length for all devices connected to the hub are within the limits described under 'LVWDQFH￿/LPLW￿IRU￿)DVW￿(WKHUQHW￿&DEOLQJ in Chapter 2. When using twisted-pair cable, be

sure you use standard, straight-through cables and not crossover or other specialized cables. When using fiber optic cable, be sure you use 50/125 mm or 62.5/125 mm guage multimode cable.

4-4 Hardware Reference