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Glossary and Abbreviations
DWBS
DEFINITY Wireless Business System
DXS
Direct extension selection
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
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
EBCDIC
Extended
ECC
Error Correct Code
ECMA
European Computer Manufacturers Association
EFP
Electronic power feed
EI
Expansion interface
EIA
Electronic Industries Association
EIA-232
A physical interface specified by the EIA.
electronic tandem network (ETN)
A tandem
Electronics Industries Association (EIA)
A trade association of the electronics industry that establishes electrical and functional standards.