How can the signal tone be adjusted for a network interruption? In the event of an unplanned restart/loss of connection, the station responds with a signal tone. You can set this sound from "Standard" to "Quiet" in the administration under expert settings of the system diagnosis volume. Published: 26/04/2020 00:37 Which ports must be enabled for the door intercom to work? Which PoE injectors are supported by Doorbird?