Security level definition

The application program specifies the acceptance level for security using any of the following macroinstructions:

APPCCMD CONTROL=OPRCNTL, QUALIFY=CNOS macroinstruction specifying the CNOS session limits control block
APPCCMD CONTROL=OPRCNTL, QUALIFY=DEFINE macroinstruction specifying the DEFINE control block (target LU uses to negotiate acceptance)
Alternate BIND using the APPCCMD CONTROL=OPRCNTL, QUALIFY=ACTSESS macroinstruction to modify the session parameters.

If the application program issues a CNOS request but does not build a CNOS control block, VTAM® builds a CNOS control block and uses the values on the APPL definition statement or the VTAM default values. For information on coding the APPL definition statement, refer to z/OS Communications Server: SNA Resource Definition Reference.