As per: https://yescrowd.optus.com.au/t5/NBN/BYO-Router-with-Optus-NBN-VoIP/ta-p/140974
I have followed the guide and have my setup as follows: NBN NTD > ASUS Router > Sage#$*% > Uniden Phone
However I can only make outbound calls and cannot recieve inbound calls.
If anyone can shed any light on the issue that would be much appreciated.
Can you receive call if you connect nbn -> sagem modem? Have you got any diversion set on your phone?