Agilent Technologies auroraSonata, User Manual

Page: 313 / 336

Issue 2 - 07/00 A4-5
Appendix 4—Glossary & Abbreviations
DPNSS
Digital Private Network Signalling System. A UK signalling
standard for use between PABXs in a private network.
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 ‘sub-address’.
Echo
In telecommunications, this is when a transmitted signal is
reflected back to the sender.
EMC
Electro
-
magnetic Compatibility.
En Bloc
A type of dialling where the digits are assembled and then
sent in a single call control packet.
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. Used to send commands
from the switch to the NT, to perform activities such as a
loopback within the NT.
ES
Errored Second. A second in which one or more BERT
errors are measured in a single direction of transmission.
ETSI
The European Telecommunication Standards Institute,
which is the standards making authority for Europe. The
ETSI protocol is the standard European protocol.
FAS
Frame Alignment Signal. This is used in the alignment of
digital transmission frames on a Primary Rate link.
Filter
A device for removing unwanted information.
Fixed Link
A type of ISDN point-to-point link which does not use
protocol transactions to establish a clear channel.