I wish I could talk this customer into using SIP proxies. It would make life so much easier.
They have multiple ingresses for their SIP trunks.
Networks in the US, HK and UK.
I'd have to admit that they've done pretty well with it using BGP but every once in a while I get a report of one way audio.
That's when I kick in to my mantra "One way audio is always network related".
Ralph