bad sound

  1. More and more bad sound during calls (from mobiles)

    Where can I begin? We have several PBX, mostly on-premise. Running in our location, sometimes running on the location of the client, so on-premise. Using V18upd8 (build 939), but it is already going on since some months. We are using desktop phones Yealink T46S, T48S, T46G, ... and others, but...
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