Why can't I get a dial tone in the headset with my Kuando Busylight Combi? Check installation(see installation guide) The two selection switches on the side of the Busylight box have the factory setting "I". Move them both to "II" and check if the problem is solved. Daniel Jensen2020-10-20T14:15:54+01:00October 16th, 2020| Share This Post With Others! FacebookTwitterLinkedInPinterestEmail