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11 Glossary
3G (UMTS)
Third generation mobile network
standard with transfer rates of up to
42 Mbps if improved data transfer
methods (HSDPA+) are used.
->
UMTS,
HSDPA(+)
4G (LTE-Advanced)
Advanced 4th generation LTE mobile
network standard (also called
LTE Max). Currently transfer rates
of up to 300 Mbps are offered. The
maximum possible transfer rates
may vary from country to country.
According to the standard, transfer
rates of up to 1000 Mbps are envis-
aged.
-> LTE-Advanced
Access control
Security system which controls the
access to a property (plot, building,
room, etc.) via a set of rules defined
by the user (access for whom, when
and where). Thus only authorised
persons obtain (time-limited) access
to the areas for which they have
been approved. Siedle offers a
modular access control system which
can also be operated in parallel with
Access via the Variobus.
Backup
Backup copy/backed up data of
a system on a separate storage
medium for the purpose of data
recovery if data is lost. System-
dependent configuration and/or
operating data can be recovered.
There are different methods for cre
-
ating a backup.
->
Data backup
Bandwidth
Parameter of signal transmission
systems in telecommunications (e.g.
IP-based networks) which describes
and classifies the theoretical data
transmission performance. The
bandwidth of the transmission path
(e.g. network cable) determines the
maximum theoretical data trans
-
mission rate which can be reliably
transmitted per unit of time and is
the difference between an upper
and lower frequency value within a
frequency range in which the data
transmission takes place by means
of signals.
The greater the bandwidth, the
more information can be trans
-
mitted per unit of time. Bandwidth
is expressed as a frequency value
in units of Hertz (Hz), if necessary
with unit suffixes (M for Mega = mil-
lions) (e.g. 300 MHz). Colloquially,
bandwidth is also used as a synonym
for the data transmission rate within
IP-based networks, although nor-
mally the transfer rate or data rate
is meant.
Cat. 5 – Category 5
Class (stage) of a standardised multi-
stage classification system of TP
cables (twisted pair data cable) for
use in telecommunications and infor
-
mation technology. The classification
system specifies the transfer property
requirements of a data cable in the
relevant class and thereby forms the
basic for the specification (link class)
of an end-to-end data transmis-
sion path with all components. The
requirements on a data cable increase
with the suffix (digit). Cat. 5 contains
data cable specifications for a data
transfer path (data cable and junc
-
tion boxes) of up to 90 m and data
transfer rates of over 20 Mbps or
operating frequencies (bandwidth)
of up to 100 MHz (Megahertz) and
thereby for the 100 BASE-TX (2-pair)
Ethernet application in IP-based
networks.
->
TP – Twisted Pair
Data backup
Copying or exporting system confi-
guration and/or operating data for
creating a backup copy for the pur-
pose of data recovery if data is lost.
-.>
Backup
Delay (information technology)
->
Latency time
