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RFID (Radio Frequency Identiﬁcation)

RFID enables data to be transferred contact-free and out of sight using radio waves. An

RFID system infrastructure comprises a transponder, a transceiver device and an IT system

operating in the background.

The transponder, a tiny computer chip with an antenna, is at the heart of this technology.

It is integrated into a carrier object, for example, an adhesive label or a plastic card. The

chip is normally used to store a numerical code. This encrypts information that is stored

in a database. As a result, every object with an RFID transponder has a unique identity.

When close to the antenna of a reading device, passive transponders that do not have

their own power supply are powered by means of inductive or capacitive coupling. The

data is also read out by means of coupling in the inductive ﬁeld.

RoHS

Abbreviation for Restriction of Hazardous Substances Directive and refers to EC Directive

2002/95/EC, which prohibits the use of certain hazardous substances when manufacturing

products and components. The goal of this directive is to prevent these substances from

harming the environment when the products are disposed of later.

Router

A device that determines the next network node to which a package is to be forwarded

on its way to the target participant. The router creates or maintains a special routing table,

which provides information on how particular destinations can be best reached. Routers

are sometimes integrated into network switches.

Monitoring of recordings or searching for a particular event.

Server

Generally speaking, a server is a computer program that provides services for other

programs, either on the same computer or on a dierent one. A computer on which a

server program is running is often also known as a server. In practice, the server computer

can run a very large number of server and client programs. The program that provides the

requested HTML pages or ﬁles for the client (browser) is known as a web server.

(Signal) Inputs and Outputs

Using the digital inputs and outputs on the T24, any device that can switch between an

open and closed circuit can be connected.

Signatures for Video Images

Digital video images can be transferred, as well as jointly edited and deleted, via data

networks. In order to prevent unwanted manipulation and to ensure the validity of digital

video sequences in the case of investigations, it is necessary to faultlessly identify the time

of recording, the origin of the images (camera ID) and the authenticity of the images (no

changes after recording). This is only possible if the images are encrypted for identiﬁcation.

Digital video cameras with integrated evaluation make it possible to embed a unique

camera ID and the precise time of day in the images, and to encrypt this data so that

any modiﬁcation or manipulation of the video sequence is exposed during later analysis.

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Mobotix T24S Información técnica Pagina 95