Glensound VITA BB PLUS Dante/ AES67 Announcers BoxTwo Four Wire Circuits The VITA BB PLUS has two 4 wire circuits. These are typically used as main programme on air, with a separate talkback circuit. The push buttons for each circuit are configurable and can operate in different modes, to allow configuration for different types of uses: Latching on off Momentary push to talk (PTT) Intelligent mode where a short tap is latching, but a longer hold becomes momentary Always on and mutes when pressed