Black Box LH1706A-SC-AU, Руководство пользователя, Страница: 17 / 29

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CHAPTER 3: Installation
3. The converter functions properly for awhile, but
then it doesn’t work. It works after powering off
and then on again.
3.1.4 L
INK
F
AULT
S
IGNALING
(LFS)
LFS is extremely helpful in network status monitoring.
The LFS LED will immediately light when a cable has
been severed or when some other disruption in service
occurs. The LFS function monitors both copper and
fiber segments, giving a total connection status report.
Set LFS (DIP-switch 5) to ON for normal operation. Set
LFS to OFF when installing cables or when testing the
network connection.
NOTE
The LFS feature influences both fiber and copper
segments. Therefore, when disruption occurs on either
segment, LFS will be activated and the LED will light,
indicating that the entire connection is down.
To take advantage of the full benefits of LFS, four
converters can be used to build a primary and a secondary
link. They must be connected to a switch that supports
Spanning Tree or Fast Spanning Tree protocols. By default,
transmission of data will travel via the primary link. Once a
fault has been detected, transmission will automatically be
switched to the secondary link, resulting in “non-stop”
network connectivity.