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Glossary
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the Internet.
FIT
See
"failure in time" (p. GL-9)
FIT rate
The number of device failures in one billion device hours.
flash disk memory module (FMM)
A nonvolatile memory device used to store the installation software generic or the NE database.
flow
Usually refers to the movement of packets within the network (that is, packet flow).
FMM
See
"flash disk memory module" (p. GL-11)
FOADM
Fixed optical add/drop multiplexer/multiplexing.
Food and Drug Administration (FDA)
An agency of the United States Department of Health and Human Services and is responsible for
the safety regulation of most types of foods, dietary supplements, drugs, vaccines, biological
medical products, blood products, medical devices, radiation-emitting devices, veterinary
products, and cosmetics.
forward defect indicator (FDI)
An automatic and fully distributed capability which indicates a failure in a server networking
layer (e.g., Physical Layer). When used with other mechanisms such as CV (Connectivity
Verification), it can indicate defects such as misbranching of LSPs and errors in swapping LSP
label.
forward error correction (FEC)
A technique used for error detection and correction in which the transmitting host computer
includes some number of redundant bits in the payload (data field) of a block or frame of data.
The receiving device uses those bits to detect, isolate and correct any errors created in
transmission. FEC avoids having to retransmit information which incurred errors in network
transit.
FPGA
See
"field-programmable gate array" (p. GL-10)
frame check sequence (FCS)
Extra characters added to a frame for error control purposes. Used in HDLC, Frame Relay, and
other data link layer protocols.
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1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
for definition.
for definition.
for definition.
GL-11
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