Lucent Technologies DDM-2000 OC-3, Руководство по установке

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GLOSSARY
Issue 9 October 1998 GL-7
DSNE
Directory Services Network Element — A NE (network element) that provides
directory 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.
DSX
Digital Cross-Connect Panel — A panel designed to interconnect equipment that
operates 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.
E
EC-1, EC-n
Electrical Carrier — The basic logical building block signal with a rate of 51.840
Mb/s for an EC-1 signal and a rate of n times 51.840 Mb/s for an EC-n signal. An
EC-1 signal can be built in two ways: A DS1 can be mapped into a VT1.5 and 28
VT1.5s multiplexed into an EC-1 (VT1.5 based EC-1) or a DS3 can be mapped
directly into an EC-1 (DS3 based EC-1).
ECI
Equipment Catalog Item — The bar code number on the faceplate of each circuit
pack used by some inventory systems.
EEPROM
Electrically Erasable Programmable Read-Only Memory.
EIA
Electronic Industries Alliance, formerly the Electronic Industries Association.
EMC
Electromagnetic Compatibility.
EMI
Electromagnetic Interference.
EOOF
Excessive Out of Frame.
EPROM
Erasable Programmable Read-Only Memory.