If you wish to forward DID purchased from us to your Asterisk server through IAX .Kindly Choose Forwarding Destination of number to " Your Own SIP Server" , Select " IAX" (you canalso choose to forward Via SIP ). In "Host" enter IP Address of your Asterisk Server. In Details Enter Extension number to which DID should be forwarded to
Here is how your IAX config file(s) should look ( Sample Configuration ).
iax.conf: [virtualnumber-iax-1] type=user permit=18.104.22.168 context=from-virtualnumber
[virtualnumber-iax-2] type=user permit=22.214.171.124 context=from-virtualnumber