I sorted the inbound calling now too I initially had problems with long handoff to PBX by SPA but was able to see a setting PSTN Answer Delay was the cause it was set to 16 seconds. I lowered it to 2 seconds.
With that settled. I am now marking this issue resolved. Let me take this opportunity to thank you for your patience and giving time and effort in helping noobs like me learn how to navigate the PBX and SPA world
@Stewart1 … Thank you soo much … if ever you pass by Manila lemme know, give me a ring on my brand new trunk line I buy you a beer or two. Cheers!