Chapter 3 : Troubleshooting - Allied Telesis AT-DMC1000/SC Installation Manual

Chapter 3
Troubleshooting
This chapter contains information on how to troubleshoot the media
converter if a problem occurs.
Note
For further assistance, please contact Allied Telesis Technical
Support at www.alliedtelesis.com/support.
Problem 1: The SYS LED on the media converter is off.
Solutions: The unit is not receiving power. Try the following:
Verify that the power cord is securely connected to the power

source and to the DC connector on the back panel of the media
converter.
Verify that the power outlet has power by connecting another

device to it.
Try using another power adapter of the same type that came with

your media converter.
Verify that the voltage from the power source is within the required

levels for your region.
An error is present on the unit. Try power cycling the unit.

Problem 2: The SYS LED on the media converter is blinking slowly.
Solution: An internal component on the unit is damaged or not working
properly. Try power cycling the unit. If power cycling does not clear the
fault, return the unit to Allied Telesis.
Problem 3: The twisted-pair port on the media converter is connected to
an end node, but the copper port's LINK/ACT LED is off.
Solutions: The port is unable to establish a link to an end node. Try the
following:
Verify that the end node connected to the twisted-pair port is

powered on and is operating properly.
Verify that the twisted-pair cable is securely connected to the port

on the media converter channel and to the port on the remote end-
node.
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