Grass Valley Trinix v.2.4.1 - Manual (Page 180)

Protected Path Configuration
180 Planning and Installation Manual
A black status flag means that the output is not available because an
HO-33120 board is not present in that slot.
The “-1” indicator means that the output is available for protected path
operation but has not been assigned a secondary path.
The “Toggle” column can be used to change from primary to secondary
or secondary to primary. In this case the “Toggle” box is checked and
the “Enter” button selected.
All protected paths can be changed together by checking either the
“Primary” or “Secondary” check box and selecting “Enter.”