I have inbound SIP provided by Gradwell in the UK. When I forward the relevant ports directly to a phone,with no setup, I can receive calls.
I would expect setting anonymous calls to Yes in Freepbx to work without issue but I’m having no luck.
I have an ANY-ANY > extension No. inbound route setup and I have tried temporarily disabling the firewall.
I have to use anonymous calls as my provider has a very long list of IPs
Any help much appreciated!!