@ddpk
In my DBC, on the WAN
MAC side, Every profile gets the same MAC address and only the last digit changes.
If 1st profile (Internet in my Case) has MAC ending in 64, then 2nd profile (Voice) MAC ends in 65 and third profile MAC ends in 66.
If this is the same for you then:
1) Delete all Profiles and create a bridge profile
2) On
router spoof the WAN MAC which will appear for your ONTs third profile
3) Setup PPPOE and use your credentials.
4) Verify that the LAN light doesn't turn off.
If this works and LAN light does not turn off then you can use the 3 profiles trick and make them refresh your MAC binding. The third profile will get MAC Bound. You can copy that WAN MAC to your router and delete this third profile to make PPPOE work on your router.
If money is not an issue then you can simply buy a BSNL approved
ONT without WiFi and with only Lan Ports and Voice (If needed).
Put it in bridge mode and use current ONTs mac address on your Router to make it work.
Costs around 1000-1800 depending on where you buy it from.