Terminal connects to an AOR that runs an application that does not use a terminal

In this scenario, your terminal (TRMC) connects to an AOR, which you use to set up a debugging profile using DTCN. When the application starts, z/OS® Debugger is started and issues and EXEC CICS® START of its display transaction (CDT#) on your terminal (TRMC). Your terminal must be connected directly to the AOR. You cannot connect through CRTE because CICS does not support issuing an EXEC CICS START to a terminal connected through CRTE.

                                 .---------------.
                                 | 3270 terminal |
                                 |               |
                                 |     TRMC      |
                                 '------,--------'
                                        |
                                        |
    .-----------------------------------+-----------------------------—-.
    |  AOR                              |                               |
    |                                   '---------------------,         |
    |                                                         |         |
    |  ,---------------------------------------------,     ,------,     |
    |  | Application runs, then z/OS Debugger issues }-----{ CDT# |     |
    |  | EXEC CICS START TRANS(CDT#) TERM(TRMC)      |     '------'     |
    |  '---------------------------------------------'                  |
    |                                                                   |
    '-------------------------------------------------------------------'
                                        |
                                        |
                                .-------'-----------.
                                | Debugging profile |
                                |     repository    |
                                '-------------------'

For this scenario to work, the CICS system administrator must complete the following tasks for the AOR: