DIN EN 50136-1-1 VDE 0830-5-1-1:2008-10

This standard specifies the general requirements for the performance, reliability and security characteristics of alarm transmission systems.
It covers the general requirements for connections providing signalling between an alarm system and an alarm receiving centre.
EN 50136 shall apply for transmission of all types of alarms; fire, intrusion, access control social alarm etc. Different types of alarm systems may in addition to alarm messages also send other types of messages, e.g. fault messages and status messages. Also these messages are considered part of alarm transmission. The term alarm is throughout the document used in this broad sense.