EXTender 1100A Switch and Remote Module System Administrator’s
Guide
98
APPENDIX D: G
LOSSARY OF
T
ERMS
A
AC/DC
Alternating Current / Direct Current – Refers to the unit’s
power supply (or a kickin’ rock band from Australia!).
ACTA American
Carriers
Telecommunications Association.
Administrator
The person responsible for configuring and/or maintaining
the units.
aLaw
A companding algorithm, used in European digital
communications systems to optimize the dynamic range of
an analog signal for digitizing.
Algorithm
An algorithm is a mathematical function that is used to
encrypt and decrypt information.
Analog
Analog refers to electronic transmission accomplished by
adding signals of varying frequency or amplitude to carrier
waves of a given frequency of alternating electromagnetic
current. Broadcast and phone transmission have
conventionally used analog technology. A modem is used to
convert analog to digital information to and from your
computer.
B
Bandwidth
A measure of the capacity of a communications channel. The
higher a channel's bandwidth, the more information it can
carry.
BAUD
The rate of data transmission based on the number of signal
elements or symbols transmitted per second. Today most
digital signals are characterized in bits per second.
Binary
A numbering system with only two values: 0 (zero) and 1
(one).
Buffer (Log)
An amount of memory which temporarily stores data to help
compensate for differences in the transfer rate of data from
one device to another.
C
Carrier
A carrier wave is a waveform (usually sinusoidal) that is
modulated (modified) to represent the information to be
transmitted. This carrier wave is usually of much higher
frequency than the modulating signal (the signal which
contains the information).
Cascading Style Sheets
A method of coding that allows administrators to define how
certain HTML, DHTML, or XML structural elements, such as
paragraphs and headings, should be displayed using style
rules instead of additional markup.
Character
In computer terminology, a character is a unit of information
that roughly corresponds to a written symbol, of a natural
language, such as a letter, numeral, or punctuation mark.
CODECS
Codec refers to "Coder-Decoder," which describes a device
or program capable of performing transformations on a data
stream or signal.
Document Number: M-1100A-MUC
Version: Rev AG
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