I can see this is a recurring theme - and there are lots of different ‘issues’ and I am lost.
New (ish) install of FreePBX 13.0.191.11 distro.
Argh! sorry, … much more to come …
Here is the rest of the info.
Actually - I may have solved it. Please ignore this thread. I will start again if it proves to be fruitless. Sorry for the waste of time.
Yes its sorted (took longer than expected to register - prob blocked temporarily by the Intrusion detection), but I have a different problem (related). I will start a new thread.
That was interesting. 
in my defence, I have been struggling with it for a week Adjusting the timeouts on the Intrusion Detection seemed to make the difference Still need to get Zoiper to logon successfully though. That is really infuriating because it worked fine before I migrated to the new VM box (on VMware 6.5) from the stand alone physical one.