• Bed databus for connecting additional selective bedside call units and display modules within the room
• Room calls: Normal calls, emergency calls, diagnostic call, doctor call
• WC calls: normal call, enhanced call, WC emergency call
• Cancellation and presence: Combined  cancellation/presence, PR 1 (green) separate  cancellation for bathroom / WC
• Acoustic signals: Call transfer for normal call and emergency call, doctor call, staff call, meal call
• Control of optical signals: WC call lamp (white), room call lamp (red), AW (cancellation and presence) lamps (green and yellow)
• Security function: All outputs short-circuit resilient, call circuit monitoring Switchable signal lamp (for use without lamps, dummy plate required)