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G L O S S A R Y
G L - 2 0
365-372-334 R2.0
Issue 4, November 2004
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).
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 Metropolis
®
DMXplore 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 Metropolis
®
shelves 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.
Summary of Contents for Metropolis DMXplore
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Page 16: ... T A B L E S x v i 365 372 334 R2 0 Issue 4 Novmeber 2004 Glossary ...
Page 286: ... Backplane Pin Replacement Replacement Methods D 1 0 365 372 334 R2 0 Issue 4 November 2004 ...
Page 292: ... Installation Checklist Overview E 6 365 372 334 R2 0 Issue 4 November 2004 ...
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