A.4 Ambient listening

33.1793GPPRelease 13Security of Mission Critical Push To Talk (MCPTT) over LTETS

[33.179 MCPTT-A.4-001] Specific roles in the organization and shall be identified to authorize and activate Ambient Listening and privileges shall be assigned to these roles to activate and register the use of ambient listening.

[33.179 MCPTT-A.4-002] The activation of the Ambient Listening functionality shall be automatically registered by the system and will be stored as an ‘event’ by the system.

[33.179 MCPTT-A.4-003] Any decision to activate Ambient Listening, or review of such a decision, may also be recorded in a suitable incident log unless to do so would interfere with the purpose for which the functionality is being used i.e. an investigation tool for evidence gathering in cases of suspected gross misconduct of staff or evidence gathering in criminal cases. If this is the case the authorization needs to be recorded elsewhere as appropriate.

[33.179 MCPTT-A.4-004] A radio user should be told as soon as possible that they are, or have been, subject to Ambient Listening and the reason why the functionality was activated. The fact they have been informed, by whom and when, should be recorded in a suitable log.