Output from POST, OpenBoot, and the Solaris OS is displayed in the system console using the network console on the service processor.
Multiple users can be connected to the console, but only one can be attached.
-> start /SP/console Are you sure you want to start /SP/console (y/n)? y Serial console started. To stop, type #.
Note - For more information about POST output, refer to the SPARC Enterprise T5120 and T5220 Servers Service Manual.
Sun SPARC Enterprise T5120 and T5220 Servers Service Manual