Pehesis:
Im not sure what an ONT port is or a RGW i dont claim to know everything. What i do know is that i have a ONT where the fiber is converted to copper, which has 4 rj45 ports for your internal network and only port 1 works and it also has 2 pots ports for your phone connection. If you check out the link below from the vodafone website which shows a typical installation and they show an installed Chorus ONT for Vodafone UFB on page 10. Then again i could be wrong im not with vodafone im just going on the installation guide from vodafone
http://help.vodafone.co.nz/ci/fattach/get/1441831/1405375288/redirect/1/session/L2F2LzEvdGltZS8xNDUyNDkzMDE4L3NpZC9ZbkNUOWVHbQ==/filename/UFB%20Installation%20guide.pdf
can you tell me where the phone is connected on that page?