Lucent Technologies LambdaUnite Installation Manual page 325

Data
A collection of system parameters and their associated values.
Database Administrator
A user who administers the database of the application.
dB
Decibels
DC
Direct Current
DCC (Data Communications Channel)
The embedded overhead communications channel in the synchronous line, used for end-to-end
communications and maintenance. The DCC carries alarm, control, and status information
between network elements in a synchronous network.
DCE (Data Communications Equipment)
The equipment that provides signal conversion and coding between the data terminating
equipment (DTE) and the line. The DCE may be separate equipment or an integral part of the
DTE or of intermediate equipment. A DCE may perform other functions usually performed at
the network end of the line.
DCF
Data Communications Function; Dispersion Compensation Fiber
DCM (Dispersion Compensation Module)
A device used to compensate the dispersion, the pulse spreading properties of an optical fiber.
DCMs are necessary for very-long-haul applications and high bit rates.
DCN
Data Communications Network
DCR
Direct Current Return
DCrtn
Direct Current return
Default
An operation or value that the system or application assumes, unless a user makes an explicit
choice.
Default Provisioning
The parameter values that are pre-programmed as shipped from the factory.
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365-374-059
Issue a, January 2002
Lucent Technologies G L O S S A R Y
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