IP-ACM is a flexible, future-proof Ethernet door module that provides IT-savvy customers with a highly secure option to manage their security, while reducing wiring and installation costs. The IP-ACM is installed near the doors that it’s controlling and communicates securely over IP to an iSTAR Ultra GCM using AES-256 encryption. The GCM contains the local access database and makes all access decisions. Each IP-ACM can support two doors, or one door with in and out readers. Each iSTAR Ultra supports up to 32 readers maximum