Fast Fiber to Fiber Media Converter – Installation Guide
4
DIP Switch Settings
Link Mode (Switch 1)
Switch Position
Mode
Up (default)
Link Pass-Through Mode
Down
Standard Mode
Link Pass-Through: In this mode, the link state on one fiber
connection is directly reflected through the media converter to the
other fiber connection.
For example, if a Far End Fault (FEF) indication is received on
port MM1, the media converter in turn sends a signal to turn off the
transmitter on port MM2/SM2. When the Far-End Fault indication
is cleared the transmitter is then turned back on.
Standard Mode: In this mode, the links on the fiber side can be
brought up and down independently of each other. A loss of link
on either fiber connection can occur without affecting the other
fiber connection.
Far End Fault (Switch 2)
Switch
Position
Mode
Up (default)
Enabled
Down
Disabled
Enabled: If the media converter detects a loss of fiber signal on
the fiber receiver, the media converter will immediately send a
FEF on the fiber link. This, in effect, notifies the fiber link partner
that an error condition exists on the fiber connection.
If the remote media converter is set up for Far End Fault (FEF)
and the local media converter is set up with Link Pass-Through, a
loss of fiber link on either the transmit or receive link will be
passed through to the end fiber connection.
Disabled: Far End Fault indications are not transmitted regardless
of the condition of the receive signal on the 100BASE-FX fiber
connection.
