Profile: BlueLinx, Inc. develops, markets, and delivers products for the wireless industry. We provide Q-zone courtesy system. Q-zone is an optional courtesy system for mobile electronics. This two-part system allows venues to regain control of their atmosphere by preventing interruptions from rings, dings, and other audible alert tones. It creates quiet zones in theaters, churches, restaurants, conference rooms, classrooms, courtrooms, libraries, and other public spaces that place a premium on decorum.