A2-4 429850
Trend AuroraPlus User Guide
DTMF A telephone signalling method in which each key
(Dual Tone generates two audio tones.
Multifrequency)
E
EAZ The subscriber number for a line using 1TR6 consists
of a fixed part which is common to the line and a
digit which identifies the terminal—this is the EAZ.
The abbreviation comes from the German word for
‘end equipment selection number’. Sometimes called
a 1TR6 ‘subaddress’.
En Bloc A dialling method whereby the user enters the entire
destination number and it is sent as a whole in the
call setup.
Encoding The process of coding information into a form
suitable for transmission.
End to End Signalling method in which signals pass right through
from end to end without processing within
intermediate nodes.
EOC Embedded Operations Channel on the U interface.
Used to send commands from the switch to the NT,
to perform activities such as a loopback within the
NT.
EPROM Erasable Programmable Read Only Memory.
Error rate The relationship between the number of incorrectly
received bits or blocks to the total number of bits or
blocks transmitted.
ES Errored Second. A second in which one or more CRC
(Cyclic Redundancy Check) violations are measured
in a single direction of transmission.
App02.P65 01/05/01, 09:194
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