Caller: NBN Partner Commander (yep - confirmed they are the Commander)

When pressed, they wanted to tell me about the NBN in the area. Asked why, they said something is happening at the backend. Said they were partnered with the NBN service providers in the area.

Caller: Mary

We had exactly the same - Mary wanted to speak with manager regarding NBN in our area. Something about upgrades and changes to backend. Asked me if we had been experiencing dropouts on handsets.
Wanted to meet with someone from our office and was supposedly meeting with all businesses in our area. Provided a number (03) 7067 9647 and said would email information so i could send it to our IT department to investigate legitimacy and never received anything

Caller: NBN Commander

Mary wanted to speak with manager regarding NBN in our area. Something about upgrades and changes to backend. Asked me if we had been experiencing dropouts on handsets.
Reluctantly provided a number to call back and said would call us later

Caller: local NBN partner of Commander

Mary introduced herself. Poor reception and nothing further could be heard. Called back and there was an automated message about this number being unavailable to take calls.
Appears to be SCAM/sales