Lucent Technologies LambdaUnite Installation Manual page 330

Fault Management
Collecting, processing, and forwarding of autonomous messages from network elements.
FCC
Federal Communications Commission
FDA/CDRH
The Food and Drug Administration's Center for Devices and Radiological Health.
FDDI (Fiber Distributed Data Interface)
Fiber interface that connects computers and distributes data among them.
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.
FEBE (Far-End Block Error)
An indication returned to the transmitting node that an errored block has been detected at the
receiving node. A block is a specified grouping of bits.
FEC (Forward Error Correction)
An error correction technique in which redundant bits are added to the payload signal enabling
the receiving station to detect and correct bit errors that unavoidably occur when an optical line
signal is transmitted over longer distances over an optical fiber. FEC is used to increase the
transmission span length.
FEPROM (Flash EPROM)
A technology that combines the non-volatility of EPROM with the in-circuit re-programmability
of EEPROM.
FERF (Far-End Receive Failure)
An indication returned to a transmitting Network Element that the receiving Network Element
has detected an incoming section failure. Also known as RDI.
FIT (Failures in Time)
Circuit pack failure rates per 10
Prediction Procedure for Electronic Equipment, BellCore Method I, Issue 6, December 1997.
Fixed-rate tributary operation of a port
Mode of operation of a port in which tributaries are provisioned for the expected signal rates.
This provisioning information is used for cross-connection rate validation and for alarm
handling (for example "Loss of Pointer").
Folded Rings
Folded (collapsed) rings are rings without fiber diversity. The terminology derives from the
image of folding a ring into a linear segment.
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G L O S S A R Y
G L - 1 4
9
hours as calculated using the method described in Reliability
Lucent Technologies 365-374-059
Issue a, January 2002