Communicating With The External Environment - Urmet 1068 Série Mode D'emploi

Wired technology is particularly indicated:

in new constructions or in those to be remodelled, where it is possible to have a conduit system where wires can be
passed;

in those situations where radio shields or significant sources of electromagnetic disturbances are found.
Radio technology is particularly indicated:

in inhabited buildings or where it is not possible to intervene on the wall structure;

where wiring can be particularly costly and difficult;

for temporary intrusion alarm systems.
As can be deduced from this information, both technologies are in some way complementary. Where one is weaker, the
other is stronger. For this reason, there are market solutions that allow the creation of hybrid systems, where both
technologies can be used to benefit from the best of both.
1.1.2.1 Radio apparatus
There are two types of radio apparatus used in the alarm systems: those that allow the system to connect to the external
environment, like the radio modules for the cell phone network, and those that allow wireless communications within the
system, mainly between radio devices and the control panel.
It is important to verify that the radio devices of the alarm system use the specific frequencies established by legislation
and that they are capable of using more than one radio channel.
Some may ask: can these radio devices create disturbances for other equipment present? Are all these electromagnetic
waves harmful?
The answer to the first question is very simple: the conformity with laws practically excludes this type of problem.
The same is true for the second question, but in this case it is better to analyse the detail.
The main condition of radio devices is to work in reception by transmitting only when necessary, for durations of a few
seconds and at very low power
Summarizing therefore, their transmission is very reduced, therefore they do not emit electromagnetic waves, and when
they have to do it they do it for short moments and at very low power.
1.1.2.2 The bus
A particular type of connection is the bus, which can be either wired or radio.
It is a channel of communication that transfers data and information among the various devices of the system,
guaranteeing their interaction.
A wired bus physically resemble an ordinary "electrical connection", but one that transmits enormous quantities of data
and information in digital format, following a specific protocol. One bus can connect several devices together, thereby
simplifying a wiring project.
1.2

COMMUNICATING WITH THE EXTERNAL ENVIRONMENT

If suitable designed, the alarm system may interact with the external environment not only locally, but also remotely.
Alarms, signalling, images, and sounds can be replicated event at a distance of thousands of kilometres. Likewise,
although far away, enabled users can send commands to the system, activate its functions, and even manage it.
What it is possible to receive or do depends on the functions offered by the system, on the means of communication
used, and on the remote device used.
The main means of communication used by the intrusion alarm systems are:

Telephone network

Mobile network

Internet

LAN
The receivers of the signals may be, in addition to the owner and other contacts he selects, Law Enforcement bodies,
Security agencies, and alarm reception centres.
IMPORTANT!
The alarm system can send alarm signals to the local or regional police station, but must be expressly requested
and authorized by them. More details can be obtained at the local or regional police station. Security services
and alarm reception centres offer the service for payment.
DS1068-017 6 LBT20717