ACC 6 Upgrade License - Core to Standard. AVIGILON™ Control Center (ACC) Network Video Management Software (HD NVMS) is standalone software for recording, viewing, and managing AVIGILON™ HD Multi-Megapixel IP cameras, Analog Video Encoders, and 3rd party IP cameras. It is licensed by the number of cameras the system will record. Please visit the AVIGILON™ website (www.avigilon.com) for minimum system requirements and a detailed list of supported 3 rd party IP cameras.