Telstra Home NBN via HFC should allow multiple phone lines
The Telstra Smart Modem is able to support up to 8 phone lines, one for each of the two physical sockets on the modem, and one for each of up to 6 coreless handsets that can register to it.
However, currently home NBN services via HFC only support one phone line, no more.
Telstra should allow home NBN customers to have more than one phone line per NBN HFC connection.
Currently the only option for multiple lines is to take up a business service, which is more costly. Then if you have Foxtel that might also cause problems.
Maybe there could be a combined home/small business offering that allows a combination of home and small business services on the one NBN connection (e.g. home phone line , business.phone line, home internet, or home phone line, business phone line, business internet etc.).