Alarm systems. Alarm transmission systems and equipment - Requirements for equipment used in systems with digital communicators using the public switched telephone network Ingestion-build-159183 it applies to suppliers preparing

it applies to suppliers preparing these documents on behalf of the railway companies or railway network users

NOTE 1: In accordance with EN 10020

BS EN ISO 8230-3

which has now been withdrawn

Alarm systems. Alarm transmission systems and equipment - Requirements for equipment used in systems with digital communicators using the public switched telephone network Ingestion-build-159183 it applies to suppliers preparingAlarm systems Alarm transmission systems and equipment Part 2 3: Requirements for equipment used in systems with digital communicators using the public switched telephone network Executive summary Requirements for alarm transmission equipment used in digital 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