outlet21Name is a read-write text field (up to 64 characters) that stores the human-readable label an administrator assigns to physical outlet 21 on the Unity PDU. During a power audit or rack changeout, having outlet 21 labeled saves a technician from having to trace the physical cord back to its receptacle to identify what it powers. For example, an admin could set outlet21Name to identify a monitor wall controller plugged into that receptacle, so outlet 21 shows that equipment's name instead of just a bare number in the outlet listing.