This read-only PhysicalIndex holds the ENTITY-MIB entPhysicalIndex value that identifies which physical slot in the chassis this row's data belongs to for the Ethernet NTE GE114 Pro VM-CH Card. It matters because it is the join key a management station uses to line up this card's status attributes with the standard entPhysicalTable entry for that slot, so an alarm on the Ethernet NTE GE114 Pro VM-CH Card can be traced to a specific physical position rather than an anonymous table row. For example, when a fault is raised against the Ethernet NTE GE114 Pro VM-CH Card, the NMS reads this index, cross-references entPhysicalTable, and tells the technician exactly which slot to pull the card from.