In the above diagram includes node A, B and converter A,B. Both of converters
linked with Gigabit fiber. In traditional fiber network architecture; if the Gigabit
copper of node A link down, the node B will not have any information, just packet
can’t forward between A and B.
With the Link Loss Forwarding feature, the link down event of node A will forward
to converter A and B. Therefore, converter A will turn off the fiber signal and
converter B will turn off Gigabit copper signal to inform node B that port link down
event occurred until the node A port recovery. In some application, you also can
obtain an event alarm signal by enable the port event alarm function. Please refer
to the section 4-4.
The following procedures will introduce how to configure LLF function.
Step 1: power on the device A, B and connect the fiber and copper ports.
Step 2: Ensure the port link LEDs is working exactly.
Step 3: if the port link event occurred, the other port will be trigger and turn off by
the LLF mechanism.
Step 4: To start the transmission and retrieve the L.L.F. function, the LLF
Dipswitch should be reset again.
4-4. Event Alarm Relay Configuration
The connection of Event Alarm Relay already described in section
2-5 Connect
the Dry Relay output
and this section will introduce how to enable it
