Each row entry represents a physical GNSS port on an IOM card in a chassis in the system. Entries cannot be created and deleted via SNMP SET operations. Entries in this table will be created automatically when the tmnxMDAAssignedType object is set to a GNSS-capable MDA type. The aluGnssPortEntry contains attributes that are unique to the GNSS TmnxPortType. The tmnxPortPortID contains the slot, mda and port numbers encoded into it. For each aluGnssPortEntry, there will be a corresponding entry in the tmnxPortTable and the ifTable.