This appendix describes the process of converting terminal and system definition macros for VTAM® devices into their RDO equivalents. Before you read further, note that you must use RDO for the TCT if you use VTAM as your telecommunication access method for at least some of your resources, because VTAM TCTs are no longer supported online (other than LDCs).
Note also that there is a special facility, called autoinstall, that can remove the need for some migration. You may decide that you don't need to migrate all of your DFHTCT macros, because you are going to use autoinstall. It would be wise, nevertheless, to read the following section and maybe perform the migration process anyway. This allows you to study the RDO definitions that the utility produces, and could help you decide how many different autoinstall models you need. For more information, see Autoinstalling VTAM terminals.
Autoinstalled TCT entries never override any others. If a table entry already exists for a given terminal, CICS® does not try to autoinstall it. (For more information see Autoinstalling VTAM terminals.)