Thanks for completely dissecting my answer
But I’ve had exactly the same issue with some of my customers who decide they want multiple trunks (most of the time to the same box) and worst most of the time they had dynamic ips (root of problems)…they resell my services and numbers, but I wonder why they even bother with a dynamic subscriber line (not even a leased or transit)…they are doing it at home…
Just today I got absolute fed up saying we don’t offer that…without a static ip although we do recommend dyndns or dynip.
I have just configure openSips to handle all these issues no customers were affected with the adjustment and my asterisk cluster is now performing beautiful and the problematic ones have recently left feedback.
Nat issues (i.e multiple numbers same port etc) for IAX2 static ip very much recommended. Allows the guys at the helm to Qos and shape calls better. with the transversal there is quality to also take into account (that matters to me more)
Thanks Ian, I know your right and the reasonings are spot on.