Re: Decoration in Voyager's Briefing Room
If a wall item isn't interacted with in some way (through action or in dialogue), it's probably safe to assume it's wall art. Device props usually had a few blinky lights on them. In the 24th century anyway. Kirk's Enterprise had wall art in some rooms, and the corridors and engineering usually had some odd pieces usually thought of as equipment.
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black (1934)