If you define a model terminal for autoinstall, you install it just as you would an ordinary resource definition; that is, by installing the group containing it. However, terminal definitions specified as AUTINSTMODEL(ONLY) are stored only in the autoinstall model table (AMT) at this time; they do not result in a TCTTE on the active CICS® system. These model terminal definitions are stored in the AMT until needed by CICS to create a definition for an actual terminal logging on through VTAM® using autoinstall. The resulting terminal definition is “automatically installed” at this time.
This is what happens when you install a TERMINAL definition, either at system initialization or using INSTALL:
If you install two model TERMINAL definitions with the same AUTINSTNAME, the second one replaces the first.
For further information about autoinstall and model TERMINAL definitions, see Autoinstalling VTAM terminals.