Sign-on incapable terminals do not allow sign-on transactions to be run. When a terminal is sign-on incapable, the userid and password must be passed to the CICS® server if the connection is configured with ATTACHSEC=IDENTIFY, and are then authenticated for every transaction started against that terminal. The transaction is executed in the server with the authorities assigned to the authenticated userid.
The userid and password for an extended terminal can be specified by a user application when a terminal is added.
The user application can change the security settings of an extended terminal at any time. The new settings will be used when further transactions are started for the terminal.
The user application can also set a default userid and password to be used with a particular CICS server. For details, refer to the CICS Transaction Gateway or CICS Universal Client: Administration guide for the operating system that you are using.