The Inverted mode is used to configure a GSM to publish the inverted value of a specific alarm’s state rather than its actual state. This is useful when one would like to report an error condition when an alarm would normally not be in error, and a normal condition when it would normally be in error. An inversion action can be configured manually (you invert the alarm and it remains inverted until you turn off the inversion mode) or by scheduling an inversion for a specific time and duration. If you would like to schedule an alarm inversion, you can report certain error conditions during certain periods of the day and the exact opposite during other periods of the day. For example, you may want a video freeze condition while on-air during the day to be reported. But during the night, if there is a movie being broadcast by accident, you may want for this condition to be reported as well.

Like the Offline and In Maintenance operational modes, the Inverted mode is Boolean (that is, the Inverted mode can be either On or Off). A primitive alarm’s Inverted mode (On or Off) is propagated up to parent virtual alarms’ Inverted modes.

You can switch an alarm’s Inverted mode to On or Off either manually or by scheduling. A manual switch is operator-driven and causes a mode change instantaneously. A scheduled switch is preconfigured by an operator to occur at a preset time and frequency.