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Glossary
Terms and Definitions
G L - 2 0
Lucent Technologies - Proprietary
See notice on first page
365-372-327 R2.0
Issue 1, October 2003
DCE - Data Communications Equipment
In a data station, the equipment that provides the signal conversion and coding
between the data terminal 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.
DDM-2000
Lucent’s first generation SONET multiplexers that multiplex DS1, DS3, or
EC-1 inputs into EC-1, OC-1, OC-3, or OC-12 outputs.
Default Provisioning
The parameter values that are preprogrammed as shipped from the factory.
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
The DEMUX direction is from the fiber toward the DSX.
Digital Multiplexer
Equipment that combines time-division multiplexing several digital signals
into a single composite digital signal.
DRI - Dual Ring Interworking
Two ring networks interconnected at two common nodes.
Drop and Continue
A technique that allows redundant signal appearances at two central offices in
a DRI network, allowing protection against central office failures.
DS1
Digital Signal Level 1 (1.544 Mb/s).
DS1(28) Circuit Pack
The DS1(28) circuit pack interfaces to the DSX-1 panel.
DS3
Digital Signal Level 3 (44.736 Mb/s).
DS3/EC-1 Circuit Pack
The DS3/EC-1 circuit pack interfaces to the DSX-3 panel.