This week I moved #VOIP #PBX to different #router whilst my office slowly gets #VDSL circuits converted to #SoGEA
Everything worked in the end, but had some glitches due to #FreePBX and #Asterisk #PJSIP still sending wrong external IP in #SIP headers (which of course causes all manner of strangeness such as calls being abruptly cleared down after 32 seconds as T1 timer times out), even though externip is set correctly
Solution is to restart Asterisk or even entire box and check SIP headers with #SNGREP to be sure correct ones are being sent out.
One thing I noticed is #AI is fully useless at providing a solution to this, as all training data is itself often incomplete - loads of people run into the same since 20 years ago but very few good answers are given even on human-run forums..