Lucent Technologies LambdaUnite Installation Manual page 326

Defect
A limited interruption of the ability of an item to perform a required function. It may or may
not lead to maintenance action depending on the results of additional analysis.
Demultiplexing
A process applied to a multiplexed signal for recovering signals combined within it and for
restoring the distinct individual channels of these signals.
DEMUX (Demultiplexer)
A device that splits a combined signal into individual signals at the receiver end of
transmission.
Deprovisioning
The inverse order of provisioning. To manually remove/delete a parameter that has (or
parameters that have) previously been provisioned.
Digital Link
A transmission span such as a point-to-point 2 Mbit/s, 34 Mbit/s, 140 Mbit/s, VC12, VC3 or
VC4 link between controlled network elements.
Digital Multiplexer
Equipment that combines by time-division multiplexing several digital signals into a single
composite digital signal.
Digital Section
A transmission span such as an STM-N signal. A digital section may contain multiple digital
channels.
Disassembly
Splitting up a signal into its constituents as payload data and overhead (an indication of the
direction of a signal).
Dispersion
Time-broadening of a transmitted light pulse.
Dispersion Shifted Optical Fiber
1330/1550 nm minimum dispersion wavelength.
Divergence
When there is unequal amplification of incoming wavelengths, the result is a power divergence
between wavelengths.
DNI (Dual Node Ring Interworking)
A topology in which two rings are interconnected at two nodes on each ring and operate so that
inter-ring traffic is not lost in the event of a node or link failure at an interconnecting point.
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G L O S S A R Y
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Lucent Technologies 365-374-059
Issue a, January 2002