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GL-12 GLOSSARY
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end user The ultimate source or destination of information flowing through a
network. It may be an application program, an operator or a physical
device medium (such as cards or tapes).
Enhanced Uniform Call
Distribution (EUCD)
An Automatic Call Distribution (ACD) feature that provides, in System 85
R2V2, automatic connection of incoming calls to agents who have been
administered in hunt groups called splits. Calls are distributed using a
circular hunting algorithm, and features are included to increase agent
efficiency. See also Automatic Call Distribution and Uniform Call
Distribution.
error-free second Any second in which no bit errors occur. Performance for digital signal
level-1 (DS1) service is measured in error-free seconds.
ESS (electronic switching
system)
A class of modern switching systems developed by AT&T in which the
control functions are performed principally by electronic data processors
operating under the direction of a stored program. See also
communications systems and switch.
ETN See electronic tandem network.
extended superframe (Fe)
framing format
A format of 24 frames. See also frame.
extended trunk access
(ETA)
An arrangement provided at a satellite location in a main-satellite network
whereby calls to extension numbers that are not assigned to that satellite
are automatically sent to the main switch for interpretation and routing.
facilities restriction level
(FRL)
An assigned number that determines both the kinds of calls that can be
made and the kinds of facilities (trunks) that can be used when calls are
routed via Automatic Alternate Routing. See also alternate facilities
restriction level.
facility The equipment constituting a telecommunications transmission path. See
also line and trunk.
facility-associated
signaling
Signaling in which a D-channel carries the signaling only for those
channels on the same physical interface. See also nonfacility-associated
signaling.
FAX (facsimile) A process, or the result of a process, whereby fixed graphic material is
scanned and the information converted into electrical signal waves to
produce an exact likeness.
Fe Framing Format A format of 24 frames. See frame.
feature A function or service provided by a hardware or software product.
FEP See Front End Processor.