National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Reliability of telephone dialer in I&HAS
Beneš, Petr ; Votruba, Zdeněk (advisor) ; Kolářík, Jaromír (referee)
The aim of this study is to evaluate and practically verify the reliability and safety of communicators from the perspective of a potential attack on the security system connected through a telephone line to the ARC (Alarm Receiving Centre). The Intruder and Hold-up Alarm System (I&HAS) itself without being connected to the ACR, is actually an acoustical optical signaling device which does not deal with the comprehensive protection of property and may not fully discourage a potential offender from entering a guarded object. The theoretical part describes the individual transmission paths of the access telephone network, the principles of communication between the I&HAS and ARC, the connection systems and their signaling. The pitfalls of the transmission paths and the possibility of their attack are also defined. The practical part describes the implementation of one of the possible techniques of attack in detail.

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