Thank you @Will, this info is super useful. I'll use the access point thing until my parents are living in the granny, so we'll have just one account.   Then when it is occupied by tenants, I have an option to: 1) either use a different NTD for granny (which is possible if I register separate address for it with council OR by talking to nbnco about a separate location ID) 2) or have just a single NTD and use 2 ports.   If I go with option 2, you said I'll have to place two "orders". Can you confirm that the other "order" will enable the tenants to choose their own ISP, have their account in their own name and will have nothing to do with my TPG account? Just trying to understand if there are any disadvantages in having a single NTD and using its 2 ports for separate households. ... View more