Accton Technology Troubleshooting, EtherHub-16 Quick Start Guide AUI Port, Symptom, Causes

EtherHub-16 Quick Start Guide

AUI Port

This hub has two built-in AUI transceivers (i.e., AUI1 and AUI2) on the rear panel for connection using thick Ethernet cable (10BASE5) or fiber optic Ethernet cable (10BASE-F). To use either AUI port, set the DIP switches to the correct positions and described on page 2. An AUI port can be connected to thick Ethernet by running an AUI drop cable from the hub to a 10BASE5 transceiver attached to the trunk line. A thick Ethernet segment can be extended up to 300 meters (1270 feet) and contain up to 500 nodes. For fiber optic connection, attach a transceiver directly to the AUI port, and run a point-to-point link up to 2 kilometers (1.24 miles).

Front Panel Indicators

This hub provides LED indicators for monitoring various network conditions. A glance at the front panel allows you to instantly monitor the status of each station port plus the overall condition of the hub.

LED

Jabber

Power

Collision

Link/Rx

Partition

Status

Steady

Steady

Flashing

Steady

Flashing

Steady

Indication

Packets have exceeded the length threshold for Jabber Lockup Protection on the hub.

Power is being supplied to the hub.

Two or more devices are transmitting at the same time. This is normal for an Ethernet network. However, if there are excessive collisions, the network may be overloaded.

Port is connected to an active node and receiving a valid Link Integrity pulse.

Traffic is being received at this port.

Port is partitioned off due to faulty cable or connectors, or excessive packet collisions.

Troubleshooting

Symptom:	Link/RX indicator remains unlit.
Causes:	Workstation’s network adapter, cable or hub port is defective.
Solution:	The most common cause is a defective network adapter or cable connection. Check
	the corresponding cable connections, or the workstation’s network adapter for
	possible defects. Verify that the correct cable type (straight or crossover) is being
	used. (Note that crossover cable is only required if you cascade hubs via standard
	MDI-X ports; i.e., Port 16MDI is not used.) Replace the defective cable or adapter.
Symptom:	Partition indicator lights up.
Causes:	Hub has partitioned RJ-45 port due to excessive packet collsions.
Solution:	If port partitioning has occurred, it will be automatically re-enabled when the
	problem is corrected or the port receives a valid data packet.

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