Control-O can issue messages and commands on other systems, and it can respond to messages and commands from other systems.
Particular responses to messages can be made dependent on which system or console issued the message.
Control-O directs actions to be performed on other systems through the SYSTEM subparameter or by the %%$COMMSYS system variable in DO COMMAND, DO COND, DO DISPLAY, DO FORCEJOB, DO RESOURCE, DO RULE, DO SHOUT and DO CTD REQ statements.
If the systems are members of a Sysplex environment, Control-O routes action requests to the specified member of the Sysplex environment, using the extended MCS console for DO COMMAND and DO DISPLAY, and XCF services for DO RULE.
If the systems are connected through VTAM or TCP, Control-O uses the IOA gateway to transfer action requests to the specified system, and waits for the response if necessary, for example, if WAITRESP=Y is specified in a DO COMMAND statement.
