Alcatel-Lucent 1665 Installation Manual page 354

Terms and definitions
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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.
DSn - Digital Signal Rate n
One of the possible digital signal rates at Alcatel-Lucent 1665 DMXtend interfaces: DS1 (1.544
Mb/s) or DS3 (44.736 Mb/s).
DSX - Digital Cross-Connect Panel
A panel designed to interconnect to equipment that operates at a designated rate. For example, a
DSX-3 interconnects equipment operating at the DS3 rate.
DTE - Data Terminating Equipment
That part of a data station that serves as a data source (originates data for transmission), a data sink
(accepts transmitted data) or both.
Dual Homing
A network topology in which two Alcatel-Lucent 1665 DMXtends serve as hosts supporting up to
8 OC-3 rings or 4 OC-12 rings. Each OC-3 and OC-12 ring is interconnected between the two
separate hosts.
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Alcatel-Lucent 1665 DMXtend R10.0
365-372-327R10.0 Issue 1
January 2013