Yes it will. I also have Spark on Chorus Fibre ONT. Just make sure you go to the additional LAN settings to get it working.
Fill out the normal WAN settings that are shown on PB Tech product page with the ASUS 68U model. You have to go to another additional menu to get it working with this model.
Under "Advanced Settings" go to..
LAN > IPTV
Under "LAN Port" is a setting called "Select ISP Profile" in the drop-down select "Manual Setting"
Below "Select ISP Profile" is another setting called "Internet" make sure VID is 10
Leave everything the same and hit Apply.
I hope this helps. Hopefully PB Tech will update this page with router setting images.
Answered by: PeterV76