Agilent Technologies Auroraduet N1726A, Руководство пользователя, Страница: 474 / 507

Issue 01 - 06/99 A5 - 5
Appendix 5 - Glossary
Clock An electronically generated periodic
signal which provides a timing reference
to the transmitted data or other circuit
functions.
Closed User A group to and from which access is
Group restricted. Members can communicate
with each other, and sometimes also
with users outside the group.
CO Central Office. A central switching or
control centre belonging to a PTT.
Codec Coder/Decoder. An analogue to digital/
digital to analogue converter.
COL Connected Line number. The number of
the connected party. This may be
different from the CPN dialled if the
call has been redirected.
Collision Interference between packets of data
which are transmitted simultaneously
by 2 stations on the same medium.
Companding A compressing/expanding process for
reducing the noise transmitted in a
signal.
Compression A method for increasing throughput by
compressing data.
Connection A concatenation of transmission
channels or telecoms circuits, switching
and other functional units set up to
provide for the transfer of signals
between points in a telecoms network,
to support a single communication.
Appx5.PM6 17/06/99, 09:57 5