Allied Telesis AT-CM70S - Manual (Page 44)

Chapter 1: Converteon™ Fast Ethernet and Gigabit Ethernet Line Cards
44
DIP Switches
Some of the Converteon™ line cards support the following features by
configuring their DIP switches:
ˆ Link Test
ˆ MissingLink™ Mode
ˆ Smart MissingLink Mode
ˆ OAM Capability
Note
For additional information on how the Link Test (LK), MissingLink
(ML), and Smart MissingLink (SML) LEDs function on the
Converteon™ line cards, refer to “Link Test, MissingLink™, and
Smart MissingLink LED Functionalities” on page 98.
Link Test
The link test is a fast and easy way for you to test the connections
between the converter ports and the end-nodes that are connected to the
ports. If a network problem occurs, you can perform a link test to
determine which port is experiencing a problem, and so be able to focus
your troubleshooting efforts on the cable and end-node where the problem
resides.
The LK LED for the twisted pair port should be green, indicating that it was
able to establish a link with its end-nodes. If the LK LED is off, the port
could not establish a link. Refer to “Troubleshooting” on page 83 for
suggestions on how to remedy the problem.
For more information on how the LK LED functions, refer to “Link Test,
MissingLink™, and Smart MissingLink LED Functionalities” on page 98.
Performing a link test does not interfere with a converter’s ability to pass
network traffic.
MissingLink™
The MissingLink™ feature enables the ports on the media converter to
pass the “Link” status of their connections to each other. When the media
converter detects a problem on one of the ports, such as the loss of
connection to an end-node, the media converter shuts down the
connection to the other port, thus notifying the end-node that the
connection has been lost.
For more information on how the ML LED functions, refer to “Link Test,
MissingLink™, and Smart MissingLink LED Functionalities” on page 98.
For example, if the twisted pair cable to the 10/100Base-TX port on the
media converter were to fail, the unit would respond by dropping the link