Its been working well, someone calls, the Obi110 sends the call to the Pi, they hear an announcement then get put through to the IVR before going to a ring group / voicemail.
I tried to call home the other day and it went straight to the freepbx voice saying that the call couldnt be connected.
I tried again and it went straight to IVR
Next time it failed
Next time it worked fine.
I have just ran raspbx-upgrade and checked all the modules are up to date and dashboard doesnt field any errors.
No, assuming you are using the same equipment for your test, I would guess its a connectivity issue. The logs, or pulling up the Asterisk CLI with high verbosity, while you make the call and have it fail would point you in the right direction.
If you turn on debugging, the output will be included in that. The advantage of that over monitoring Asterisk using "asterisk -vr’ is that you also get time stamps, so some other “non-SIP” issues can be identified.