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If allowed by the administrator, the user can change the message ringtone volume. 

Via a new MQTT command, the ringtone volume of the incoming message can be changed from 00% to 100% . The ringtone volume setting itself is not changed.


  • N870/N670 software 2.44.0 or higher
  • R700H PRO / S700H PRO / SL800H PRO with software version 10.04 or higher
  • Other (PRO) handsets do not support this feature
  • MQTT command: "ringtone_volume":"100",

The following handset settings can be overruled with this MQTT command

  • Manual ringtone volume setting
  • Audio profile "Silent"
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