Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 137)

Acronyms and Definitions
Verilink Access System 2000: Basics Glossary-17
E
E-bits Used in E1 transmissions, each
cyclic redundancy check (CRC)
submultiframe uses one E-bit.
These bits reside in frames 13 and
15 of the cyclic redundancy
check multiframe . The bits
indicate to the far end that a CRC-4
error was received. There are two
E-bits—one for each sub-
multiframe.
E1 European standard for a 2.048
Mbit/s digital line containing 32
timeslots.
EFS See error-free second (EFS) .
ELB See equipment loopback (ELB) .
electromagnetic interference (EMI) Radiation leakage from a device
using high-frequency wave energy
and signal level. Acceptable levels
for particular devices and
operating frequency are specified
by such agencies as the Federal
Communications Commission,
British Approvals Board of
Telecommunications, Verband
Deutscher Electrotechniker
(referred to as VDE), and the
Canadian Safety Association.
Electronic Industries Association (EIA) An American association that
defines standards for transmitting
serial data by wire.
EPROM Erasable Programmable Read Only
Memory (EPROM or Flash). A
memory that can be recorded or
erased electronically, and does not
lose its content when electrical
power is removed.
equipment loopback (ELB) A test condition that sends the
signal from the end-user’s
equipment to the CSU’s Equipment
port and back to the equipment
port without passing through the
CSU circuitry.
error-free second (EFS) A second with no detected errors.
errored second (ES) A second with one or more error
events.
errored seconds-line The number of seconds with one
or more code violation-lines. See
code violation—line (CV-L) .
errored seconds-path The number of seconds in which a
bipolar violation occurs on the
network line. See code
violation—path (CV-P) .