Field is deprecated; use the 'nas-port-format' field to specify the NAS port format. Will be used only if 'nas-port-format' is set to 'not-applicable'. TRUE if new NAS port ID format is used, FALSE if old NAS Port ID is used. On the TNT product family the new NAS port ID format is used by default. The old format cannot be used for multi-shelf systems or if any line cards are in a slot greater than the twelfth position.