GL-6
Issue 5 June 2000
363-206-208
Glossary
Digital Multiplexer
Equipment that combines by time-division multiplexing several digital signals into a sin-
gle composite digital signal.
DPLL
Digital Phase-Locked Loop.
DRI
Dual Ring Interworking.
DS1
Digital Signal Level 1 (1.544 M/bs.) This level contains24 DS0 (24 digitized voice chan-
nels at 64 kBs/s each) channels plus overhead.
DS1 Circuit Pack
The DS1 interface circuit pack that is inserted into the OS-3 shelf and interfaces to the
DSX-1 panel.
DS3
Digital Signal Level 3 (44.736 M/bs). This level contains 28 DS1 signals plus overhead.
DS3 Circuit Pack
The DS3 circuit pack that is inserted into the OS-3 shelf and interfaces to the DSX-3
panel.
DSn
Digital Signal Rate n — One of the possible digital signal rates at DDM-2000 interfaces:
DS1 (1.544 Mb/s), DS3 (44.736 Mb/s).
DSNE
Directory Services Network Element — An NE (network element) that provides direc-
tory services translation in an OSI subnetwork.Can also be a GNE. A single DSNE for a
network must be set in Release 7.2 and later. The DSNE recognizes, communicates
with and controls DCC traffic between all network elements. TARP releases do not use
the DSNE.
DSX
Digital Cross-Connect Panel — A panel designed to interconnect equipment that oper-
ates at a designated rate. For example, a DSX-3 interconnects equipment operating at
the DS3 rate.
DT
Distant Terminal (See, also, “FE” and “remote”.)
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.
Содержание DDM-2000 OC-12
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