When an MAI-OC session is established with a target application, MAI-OC emulates an LU-Type 1 device (for example, an IBM 3767) as the secondary end of the session. The target application sees the MAI-OC connection as a standard session with a physical 3767 terminal.
Certain application subsystems, such as IMS, require that every logical unit with which they are to have a session be defined to them before any session with the LU is allowed.
To establish MAI-OC sessions with systems such as CICS or IMS, include the VTAM LU names for MAI-OC to use when requesting the session in the appropriate system definitions. Other relevant information should be included with the VTAM LU names, such as the ability of the logical unit to act as a master terminal, its authority level.
The definition to a subsystem such as CICS or IMS is the same as for a physical 3767 device. See the appropriate manuals for the precise coding requirements for the system that you are using.