3
Link Fault Pass Through (LFPT)
LFPT is a troubleshooting feature that combines TX Link Loss and FX Link Loss on
each media converter. LFPT is permanently enabled on the IE-MiniMc LFPT and
Telco/LFPT, and if two of them are installed back to back, a failure on any segment
will be propagated across all links and all LEDs will extinguish.
NOTE
A fault on any segment will force all LINK LEDs off.
DC Terminal Block Wiring Instructions
The IE-MiniMc LFPT and Telco/LFPT can also be powered with the DC terminal
block. From a power source, connect to any one positive and any one negative
terminal on the IE-MiniMc LFPT and Telco/LFPT.
Telco Power
NOTE
It doesn’t matter which terminal is referenced (connected to) ground. For example, when
using a -48 VDC power supply in which the positive rail is connected to the ground, connect
this side to a terminal block “+” terminal and the -48 VDC side to the negative terminals.
+5 to 24 VDC
Ground
(common)
-48 VDC
