Soundboard

‘You thinking about making your comeback as a model, Ray?’
Looking up, he spotted the detective inspector hovering over the soundboard. ‘
...
He mock saluted as she moved away from the desk, calling together ther est of the team. Glancing at the framed photograph on the corner of hisd esk, he suddenly remembered that Alex’s interview was approaching. (Little Girl Gone Stephen Edgar)


Hi. Could you please tell me what the bold part means here? They are in a police station.

The soundboard may be the control panel for a communication system, connecting with patrol cars, other emergency services etc.