I connected to the NBN recently and opted for self install. I got two dates provided. The first was the delivery of the Modem and the second was the NBNCO guys coming out to install the NBN Modem. After all was completed my NBN didnt work for 2 weeks as the wrong port was configured on the NBN modem.
After that was fixed by a tech that came out it worked faultlessly for a month when it just stopped with a Red fault light.
No one can explain the issue....