Password phrase support requires a minimum of zOS 1.10, CA Top Secret r9 and password phrase support by the application.
The application must support password phrases.
A password phrase signon request is different than the signon with an upto 8 character password.
So, the application must have different code for the signon request for a password phrase. The application must also provide a field to enter the password phrase to be used for the signon.
The signon process itself is really not any different than a regular signon except that a longer password is being entered.