GL-8 Issue 5 June 2000
363-206-208
Glossary
F
FDDI
Fiber Distribution Data Interface.
FE
Far-End. Any other network element in a subnetwork other than the one the user is at or
working on. Also called remote.
FE ACTY
Far-End Activity — An LED on the user panel.
FEBE
Far-End Block Error — An indication returned to the near-end transmitting node that an
errored block has been detected at the far-end.
FE ID
Far-End Identification — The 7-segment display on the faceplate of the SYSCTL circuit
pack.
FEPROM
Flash EPROM — A technology that combines the nonvolatility of EPROM with the
in-circuit reprogrammability of EEPROM (electrically-erasable PROM).
FERF
Far-End Receive Failure — An indication returned to a transmitting terminal that the
receiving terminal has detected an incoming section failure.
FE SEL
Far-End Select — An LED on the user panel.
FIT
Failures in /10
9
hours of operation.
Free Running
An operating condition of a clock in which its local oscillator is not locked to an internal
synchronization reference and is using no storage techniques to sustain its accuracy.
FT-2000
Lucent Technologies’s SONET OC-48 lightwave system
Function Group (Fn)
The set of circuit pack slots into which a set of function units can be inserted. These
may be Fn A, B or C.
Function Unit
Refers to any one of a number of different circuit packs that can reside in the A, B, or C
function unit slots on the DDM-2000 OC-3 Multiplexer, in the A, B, C, or D function unit
slots of the DDM-2000 OC-12 Multiplexer, or in such slots in the FiberReach.
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