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Alarm systems - Alarm transmission systems and equipment - Part 1-4: Requirements for systems with voice communicators using the public switched telephone network
German title
Alarmanlagen - Alarmübertragungsanlagen und -einrichtungen - Teil 1-4: Anforderungen an Anlagen mit automatischen Wähl- und Ansageanlagen für das öffentliche Fernsprechwählnetz
Publication date
1998-01
Original language
English
Publication date
1998-01
Original language
English
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