IP Flush Master v2 - External Loudspeaker
From Zenitel Wiki
The IP Flush Master v2 has the option to connect an additional external loudspeaker.
To use an external loudspeaker the output must be activated from the Device Web Interface.
First enable Advanced Mode in the top right corner. Then navigate to Advanced ICX-AlphaCom/SIP Configuration --> Audio Settings.
Under Audio Outputs change External Loudspeaker from Not Connected to Standard Loudspeaker.
Volume levels for both normal audio and alarm audio (audio override) must be adjusted in the web configuration.