MI interfaces are management interfaces in ATM networks. There are five MI interfaces, designated M1 to M5:
M1 forms the general management of ATM terminal equipment. It is the management interface 1 for management in private ATM networks and terminal equipment connected to this ATM network
M2 is management interface 2 for the management of private ATM networks or their components such as switches
M3 is management interface 3 for managing connections between public and private ATM networks
M4 is the management interface 4 for the management of public ATM networks and their associated network elements
M5 is the management interface 5 for the management of connections between two public ATM networks.