DSC TL2803G Manual de Usario

DSC No categorizado TL2803G

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the Power of
Technology
Overview
Contents
Introduction 3 .....................................................................................
Frequency Hopping Spread Spectrum 4 .............................................
Full Two-Way Synchronized TDMA Communication 5 .........................
Secured Wireless Communication with AES Encryption 6 ...................
Unmatched Benefits with a Breakthrough Technology 7 .....................
Summary 8 .........................................................................................
© Tyco 2016. This document contains Tyco proprietary information, as well as publicly available information. Both may be subject to
change without notice. All rights reserved. Reproduction or distribution other than for intended purposes is prohibited, without the
prior written consent of Tyco.
The trademarks and service marks of Tyco, including the Tyco mark and logo and PowerG are the exclusive property of Tyco, and
may not be used without permission. All other marks ar e the property of their respective owners. Created 04/2016.
Frequency Hopping Spread Spectrum
Frequency Hopping Spread Spectrum (FHSS) derives from military radio technology where it was designed
to be secure and reliable under adverse battle conditions. FHSS changes the frequency of a transmission
at intervals faster than an intruder can retune a jamming device. With FHSS, the bandwidth is divided
into multiple frequency channels. Once a wireless connection is established and time-synchronization
is gained, the receiver and transmitter agree on one of practically infinite frequency hopping sequences.
These sequences are both encrypted and time-dependant. Based on the current time and a mathematical
calculation, both the receiver and transmitter hop to the next frequency channel in the sequence at the
same time. Unless the system time, the system encryption key and the proper calculation are all known,
the communication cannot be tracked. As a result, unauthorized interception of, or eavesdropping on, a
communication is virtually impossible.
The PowerG network uses Frequency Hopping Spread Spectrum technology. The network continuously
hops between multiple frequencies spread over the entire assigned frequency band: 8 hopping frequencies
in the 433-434MHz bands, 4 hopping frequencies in the 868-869MHz bands, and 50 hopping frequencies
in the 912-918MHz bands.
The network does not remain in a single frequency but switches frequencies 64 times a second, using an
encrypted unique pseudo-random sequence known only to devices enrolled to the PowerG panel. The
pseudo-random sequence differs from one PowerG panel to another.
By using FHSS technology, the PowerG network successfully overcomes intentional and un-intentional
interferences and jamming. Multiple PowerG-based alarm systems can operate in the same vicinity without
interfering with each other. Robustness and reliability of the wireless network increases dramatically.
An analogy to FHSS is as follows: Imagine a car driven in a multi-lane highway. As a strategy, the driver
continuously and rapidly changes lanes. If one of the lanes is blocked (by road-works or a road accident)
the car will avoid the disturbance because it is changing lanes continuously. The following figure illustrates
the FHSS concept.
4
Band
Time
Frequency Bad Hop
Good
Hops
Bad frequency
(interferency)
Frequency hopping avoids blocking and interferences

Especificaciones del producto

Marca: DSC
Categoría: No categorizado
Modelo: TL2803G

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