I don't know if this thread is still active, but does anyone here has had any success in using the VOIP details as a trunk in FreePBX for outbound as well as inbound calls?
I have been all over the internet, but I can't find a single on how to make FreePBX register an extension as a SIP trunk. Some have said that this is not possible, but it certainly is, since I have used an FXO gateway which behaves quite like an extension.
If anyone here can please help me out, on how to set up the VOIP extension as a trunk (be it from BSNL / AIRTEL / LOCAL ISP/ BSNL WINGS), it would be of great help.