My current plan is NF/512. My current telephone provider is Telstra. Does it mean my current ADSL1 provider is Telstra also? If it is, there is negligible waiting time from Telstra ADSL1 to Optus ADSL2?I think there is some sort of confusion, are you currently on Telstra ADSL1 or AAPT ADSL2+? Your interpretation of the above comments is correct, but they are only applicable when moving from AAPT ADSL2+ to Optus ADSL2+. When moving from Telstra ADSL1 to Optus ADSL2+ no codes need to be removed beforehand and there is negligible downtime.
Moving from an old AAPT plan (like BYO Line) to A30 is simply a billing / contract change. There is no downtime or waiting time. Moving from Telstra ADSL1+ to AAPT ADSL2+ is a different process, but is also streamlined and incurs no downtime.