Alarm systems. Alarm transmission systems and equipment - Requirements for equipment used in systems with voice communicators using the public switched telephone network Ingestion-build-48974 you can efficiently manufacture high-quality

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Alarm systems. Alarm transmission systems and equipment - Requirements for equipment used in systems with voice communicators using the public switched telephone network Ingestion-build-48974 you can efficiently manufacture high-qualityAlarm systems Alarm transmission systems and equipment Part 2 4: Requirements for equipment used in systems with voice communicators using the public switched telephone network Executive summary Requirements for alarm transmission equipment used in voice communicator systems utilizing the public switched telephone network. Abstract This European Standard specifies additional requirements to those specified in EN 50136 2 1 for equipment used in voice