Turn off all Units in a housecode.
This command can only be sent to an X10 controller. It has no effect on any other interface type.
all Units off “X10 housecode A-P”
interface (name of an X10 capable interface)
all units off "A" interface "My CM11"
If the interface parameter is left out you must have a Default Outgoing Powerline interface selected in the preferences or no command can be sent.
Some devices do not respond to this command.