You can setup VoIP on XX530v since your VoIP profile is IPv4 and can even run Zoiper to remotely call from your Airtel landline number using the PC/smartphone Zoiper app.
Create another XPON WAN profile on XX530v advanced settings. You can name it
Airtel_VoIP or anything as per your choice.
Under Service type, select Internet & VoIP
Set VLAN ID to 660 and Priority to 4
Set Internet connection type to Static IP
Fill the
VoIP IPv4 address, subnet mask and gateway. You can copy them from your Airtel router’s settings.
Since Primary DNS is mandatory to be filled on TP-Link, you can fill Google DNS (8.8.8.8) or Cloudflare DNS (1.1.1.1) there.
Under Advanced tab, keep NAT & IGMP Proxy checked.
Then click on Okay to create the Voice WAN profile.
Once that is done, go to Static Routing tab on the TP-Link XX530v. Fill the VoIP IP details by copying them from the Airtel router's Network setting -> Routing -> Routing table.
Once you have done these, we can proceed to telephone number addition.
