Allied Telesis AT-PC2002/POE - Manual (Page 57)

AT-PC2002/POE Media Converter Installation Guide
57
Problem 6: Two network devices are forwarding traffic through the media
converter, but performance is slow.
Solutions: Try the following:
❒
There might be a duplex mode mismatch between the twisted pair port
and the network device connected to the port. A duplex mode
mismatch occurs when a twisted pair port using Auto-Negotiation is
connected to a device with a fixed duplex mode of full duplex. If this is
the cause of the problem, you must adjust the duplex mode of the port
on the network device or the twisted pair port on the media converter
so that both ports are using 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 2 or 3 for suggestions on how to resolve this issue.
Problem 7: The media converter is operating in the Link Test mode and
the Link LED of one of the ports is blinking.
Solutions: This could be an indication of an intermittent link between the
port and the network device. There could be a problem with the cable or
the network device connected to the port. See Problem 2 or 3 for
suggestions on how to resolve this issue.
Problem 8: The media converter is operating in the Smart MissingLink
mode and the Link LEDs for both ports are blinking.
Solutions: 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 modes on all of 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 possibility is an intermittent link on one of the ports, 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.
Note
If you need further assistance, please contact Allied Telesis
Technical Support. Refer to “Contacting Allied Telesis” on page 13.