This read-only enumeration reports whether the CMM4's default plug is inserted and/or its default switch is active, with values covering none, plug inserted, switch active, or both together, and the description warns that if either is active the next boot will be a default (factory) boot. It is an important safety check because it warns an admin the unit will wipe its configuration on next reboot if left in that state. Before scheduling a maintenance reboot, an admin would check defaultStatus to make sure it reads none and the unit will not accidentally revert to factory defaults.