Avaya Communication Manager Administrator's Manual page 1797

duplication option
A system option that duplicates the following: control carrier containing the SPE, EI circuit packs in
carriers, fiber-optic cabling between port networks, and center-stage switch in a CSS-connected
system.
DVC
Digital Video Conferencing. Products or services based on the H.320 standard defined by CCITT.
DWBS
DEFINITY Wireless Business System
DXS
Direct extension selection. A feature of certain Avaya attendant consoles.
E
E1
A digital transmission standard that carries traffic at 2.048 Mbps. The E1 facility is divided into 32
channels (DS0s) of 64 kbps information. Channel 0 is reserved for framing and synchronization
information. A D-channel occupies channel 16.
E & M
Ear and mouth (receive and transmit)
EA
Expansion archangel
EAL
Expansion archangel link
ear and mouth (E & M) signaling
Trunk supervisory signaling, used between two communications systems, whereby signaling
information is transferred through 2-state voltage conditions (on the E and M leads) for analog
applications and through a single bit for digital applications.
EAS
See Expert Agent
ECC
Error Correct Code
ECMA
European Computer Manufacturers Association
ECT
Enhanced Call Transfer
EEBCDIC
Extended Binary-Coded Decimal Interexchange Code
EFP
Electronic power feed
EI
Expansion interface
EIA
Electronic Industries Association
Administrator's Guide for Avaya Communication Manager
November 2003
Selection.
Glossary and Abbreviations
1797
E