#Enable or disable the intercom feature; 0-Disabled, 1-Enabled (default);
features.intercom.allow = 1
#Enable or disable the phone to mute the Speaker when answering an intercom call; 0-Disabled (default), 1-Enabled;
features.intercom.mute = 0
#Enable or disable the phone to play the intercom warning tone; 0-Disabled, 1-Enabled (default);
features.intercom.tone = 1
#Enable or disable the phone to barge in an intercom call; 0-Disabled (default), 1-Enabled;
features.intercom.barge = 0
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.