Introduction
1 Scope
2 Normative references
3 Definitions
4 Requirements
  4.1 Fault information
  4.2 Other functions
       4.2.1 General case
       4.2.2 Social alarms case
  4.3 Messages
  4.4 Message queue
  4.5 Input priorities
  4.6 Alert indication
  4.7 Message acceptance
  4.8 Information to be presented
  4.9 Coding of the presentation of information
  4.10 Failure of the means of presentation of information
  4.11 Logging
  4.12 Access levels
  4.13 Access to annunciation equipment
  4.14 Access to annunciation equipment configuration data
  4.15 Access to log data
  4.16 Monitoring of interconnection with the receiving centre
       transceiver
  4.17 Power supply
  4.18 Power supply total failure
  4.19 Software security
  4.20 Monitoring of software controlled annunciation equipment
5 Environmental requirements
6 Testing
  6.1 Conditions
  6.2 Functional tests
  6.3 Environmental tests
7 Documentation
Annex A (informative) Message acknowledgement and securing message
Annex B (informative) Presentation of messages and message acceptance