Inbound calls do not work after upgrading freePBX

I had a working version of a NerdVittles implementation of Trixbox. I upgraded freePBX and now Inbound calls do not work at all. When calling in there is no ring, the auto-attendant does not pick up, no sound at all, the ‘Panel’ does not indicate a call, the Call Logs do not indicate an inbound call, and the reports do not seem to indicate discovery of an inbound call. My account with Telasip shows ‘Registered’.

Any help would be greatly appreciated!

Thank you