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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Glossary and Abbreviations
Page GL-23
F
FAC
Feature Access Code
facility
A telecommunications transmission pathway and associated equipment.
facility-associated signaling (FAS)
Signaling for which a D-channel carries signaling only for those channels on the same physical
interface.
FAS
Facility-associated signaling
FAT
Facility access trunk
FAX
Fac s imi le
FCC
Federal Communications Commission
FEAC
Forced Entry of Account Codes
feature
A specifically defined function or service provided by the system.
feature button
A labeled button on a telephone or attendant console used to access a specific feature.
FEP
Front-end processor
FIC
Facility interface codes
fiber optics
A technology using materials that transmit ultrawideband electromagnetic light-frequency ranges
for high-capacity carrier systems.
fixed
A trunk allocation term. In the fixed allocation scheme, the time slots necessary to support a
wideband call are contiguous, and the first time slot is constrained to certain starting points.
flexible
A trunk allocation term. In the flexible allocation scheme, the time slots of a wideband call can
occupy noncontiguous positions within a single T1 or E1 facility.
floating
A trunk allocation term. In the floating allocation scheme, the time slots of a wideband call are
contiguous, but the position of the first time slot is not fixed.
FNPA
Foreign Numbering-Plan Area