AT-S63 Web Browser User’s Guide for AT-9400 Stacks
Section II: Advanced Operations 51
The two network devices are operating in different duplex modes. The
media converter performs best when its two network devices and its
two ports all use the same duplex mode.
There could be an intermittent problem with one of the network devices
connected to the media converter or with a cable. To determine
whether this might be the problem, set the unit to the Link Test mode
and observe the Link LEDs of the ports. If one of the Link LEDs
periodically blinks, it could mean that the link is intermittent. See
Problem 6 for suggestions on how to resolve this issue.
Problem 6: The media converter is operating in the Link Test mode and
the Link LED of a port is blinking.
Solution: This could indicate that the link between the port and the
network device is intermittent. There might be a problem with the cable or
the network device connected to the port. Try connecting another network
device with a different cable to the same port on the media converter. If the
Link LED remains steady on, then the problem is indeed with the original
cable or the network device.
Problem 7: The media converter is operating in the Smart MissingLink
mode and the Link LEDs for both ports are blinking.
Solution: This could have several possible causes. This can occur when a
port is connected to another media converter that also supports the Smart
MissingLink mode, forming a chain of media converters. Media converters
that support the Smart MissingLink mode will pass the loss of a link on a
port to all the media converters in the chain. This can result in situations
where the Link LEDs on both ports of a media converter are blinking,
indicating that the source of the problem has its origins in another media
converter in the chain. To identify the source of the problem, set the
operating mode on all the media converters in the chain to Link Test and
then examine the Link LEDs of the ports. The Link LED of the port that
cannot establish a link to its network device will be off.
Another possible cause is that a port is only able to form an intermittent
link with its network device, perhaps because of a problem with the cable
or the network device. To identify which port is having the problem, use the
Link Test mode.
If you need further assistance, please contact Allied Telesis
Technical Support. Refer to “Contacting Allied Telesis” on page 14.