It’s just a standard router provided by plusnet, the other ports for media where also blocked but I setup port forwarding for those to my local PBX and the test came back as successful, I have tried setting up both UDP and TCP for 5060 and 5090 in separate rules, spent a few hours trying to fiddle with the settings to no avail.
This is the 8th system I have setup so I kind of know what I am doing but none of the others had this same issue
When I run the firewall test the port the mapping port sequentially increases every time to 20008 the resets back to 20000