EN 50136-1-4:1998-01

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

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