You can divide the functions and message traffic of the system among a number of consoles. These consoles make up a multiple-console configuration controlled and serviced by MCS.
In distributed mode, a multiple-console configuration for a system or sysplex consists of up to 99 active consoles per system; in shared mode the constraint is 99 consoles per sysplex. These consoles can have different levels of authority. For more information, see z/OS MVS Planning: Operations.
Other MCS and SMCS consoles are used for specific types of operator-system communication when it is more convenient to have a console located away from the processor. An MCS or SMCS console might, for example, be located close to tape or remote teleprocessing devices to make it easier for the operator in that area to see the magnetic tapes. An MCS or SMCS console without master authority cannot enter all commands (see System commands grouped according to system command authority), and can receive only those messages that are specifically routed to that console.
Your installation might further limit how you can use a console by assigning an operating use that prevents the console from accepting commands.
A console you use both to issue commands and receive messages is in full-capability operating mode. A console that only receives status displays is in status display mode. A console that only monitors system activities and assists in system security is in message stream mode. Both message stream and status display consoles do not accept commands.
The different console modes help limit the number of consoles that operators can use to issue commands, and yet provide operators the information that they need to do their work.