DFC Data flow control
DFT Discrete Fourier transform
DHCP Dynamic Host Configuration Protocol
DIP-switch Small switch mounted on a printed circuit board
DI Digital input
DLLB Dead line live bus
DNP Distributed Network Protocol as per IEEE Std 1815-2012
DR Disturbance recorder
DRAM Dynamic random access memory
DRH Disturbance report handler
DSP Digital signal processor
DTT Direct transfer trip scheme
ECT Ethernet configuration tool
EHV network Extra high voltage network
EIA Electronic Industries Association
EMC Electromagnetic compatibility
EMF Electromotive force
EMI Electromagnetic interference
EnFP End fault protection
EPA Enhanced performance architecture
ESD Electrostatic discharge
F-SMA Type of optical fibre connector
FAN Fault number
FCB Flow control bit; Frame count bit
FOX 20 Modular 20 channel telecommunication system for
speech, data and protection signals
FOX 512/515 Access multiplexer
FOX 6Plus Compact time-division multiplexer for the transmission of
up to seven duplex channels of digital data over optical
fibers
FPN Flexible product naming
FTP File Transfer Protocol
FUN Function type
G.703 Electrical and functional description for digital lines used
by local telephone companies. Can be transported over
balanced and unbalanced lines
1MRK 511 393-UEN A Section 9
Glossary
670 series 2.2 IEC 55
Communication protocol manual
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