What type of NBN connection (FTP, FTTC, etc) do you have?
I'm assuming you are on either FTTB or FTTN since you are using a Technicolor Modem, is that correct? If so, is the Technicolor Modem in bridge mode?
Hi, yes we are using FTTN and the have bridged the Technicolor
OK, so nothing needs to be done to the Technicolor.
I assume this whirlpool post is from one if your group. RedSector's first set of instructions spells out what needs to be done. While he stated he needed to disable RTSP Passthrough I did not have to do that, and I've been running Optus VoIP fine since late last year. He correctly states that you only need to do port 5060. My reference to 5060-5061 is incorrect as that was based on some conflicting info I was getting at the time.
My FTTC setup is: NBN Box->Asus RT-N66U->PAP2 Voip Adapter