Communications

CA Datacom CICS Services does not allow an application program to directly issue such commands as CONNECT, DISCONNECT, IMMEDIATE, OPEN and CLOSE. However, there are situations and procedures which require that an application control environmental conditions. For example, a master menu application might control all transaction executions. To satisfy such special requirements, use one of the following methods of communicating with CA Datacom CICS Services:

Communication Method	Purpose	Output	Location of Details
Standard CA Datacom/DB Call	Issuing CONNECT, DISCONNECT, IMMEDIATE, LOAD, DELETE, RESTART,DEFER, AUTO, OPEN, and CLOSE commands for a specific MUF or User Requirements Table (URT) or issuing an inquiry for a specific URT.	Provides output to the Message Log file (DBOCPRT). Provides a special return code having limited meaning (see Return Codes).	Standard CA Datacom/DB Call
CICS Link	Issuing CONNECT, DISCONNECT, IMMEDIATE, LOAD, DELETE, RESTART, AUTO, DEFER, OPEN and CLOSE commands for a specific MUF or User Requirements Table (URT).	Provides a standard CA Datacom/DB return code indicating the results of the command.	CICS Link
CICS XCTL	Issuing any DBOC command or DBEC command. Initiate DBTS or DBUG process.	Provides output to the terminal. Provides output to the Message Log file (DBOCPRT). Provides no response to the linking application.	CICS XCTL
Interval Control Start (start task)	Issuing any DBOC command or inquiry or any DBEC command.	Provides output to the Message Log file (DBOCPRT). Provides no response to the starting task.	CICS Interval Control Start
MVS CONSOLE	Issuing any URT or MUF action excluding inquiry.	Provides output to the DBOCPRT file. For DBEC in remote mode, it is the CICS DBOCPRT where the reuest was routed.	CONSOLE Commands

Note: The commands passed to CA Datacom CICS Services using any of the previous methods are checked for MSTOPR authorization before being allowed to execute.