Perle Systems C-100-XXXXX - Manual (Page 7)

Fast Ethernet Media Converter – Installation Guide
7
If the Media Converter has been set to Link Pass-Through mode, the
effect will be the same as FEF, since the link loss on the fiber receiver
will bring down the copper link, which will in turn cause the transmit
fiber link to be brought down.
Note: If it is required to either generate or detect the FEF signal, then
the FEF switch needs to be set.
Disabled: The Media Converter Module will not monitor for, or
generate Far End Fault.
The following diagram is an illustration of the operation of this feature.
(A) – Remote Media Converter setup for Far End Fault Enabled, Auto
Negotiation – OFF and Link Mode – Standard.
(B) – Local Media Converter setup for Link Pass-Through - Enabled
and Auto Negotiation - OFF
1 – (A) loses fiber connection on its receiver
2 – (A) sends an FEF
3 – (B) detects loss of link in its fiber receiver
4 – (B) drops link on copper connection through Link Pass-Through
5 – (A) Link on copper connection is not affected.