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Glossary
GL-8 Issue 1 December 1997
ES
Errored Seconds — A performance monitoring parameter. ES "type A" is a second with
exactly one error; ES "type B" is a second with more than one and less than the number
of errors in a severely errored second for the given signal. ES by itself means the sum of
the type A and type B ESs.
ESD
Electrostatic Discharge
ESF
Extended Super Frame (format for DS1 signal)
EST
Environmental Stress Testing
F
FCC
Federal Communications Commission
FDDI
Fiber Distribution Data Interface
FE
Far-End. Any other network element in a maintenance 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 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 new 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 in10
-9
hours of operation.
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