Specifications

Model No.
Running Head
DTE
Data Terminal Equipment
DTR
Data Terminal Ready
DX
Duplex Signaling
E1
Digital 2.048 Mbps line rate, widely used in countries outside the U.S. and Canada.
EFCI
Explicit Forward Congestion Indicator
ELAN
Emulated Local Area Network
EPROM
Electronic Programmable Read-Only Memory, stores firmware on plug-in modules of the
system.
ES
Errored Seconds. The number of seconds for which BRI card has detected a NEBE or FEBE
greater than zero (0).
ESF
Extended Superframe (24-frame sequence for a T1 line; consists of two superframes)
ESS
Electronic Switching System
E&M
Earth and Magnetic, or recEive and transMit. The signaling leads on inter-switch voice
connections.