Form one Russian to another (O.K., it is a joke).
“However if you want to send calls to Quintum, then you can not change the port on which Quintum listens.”
What about putting a small Linksys betwen the Quintum and the internet, and on the port forwarding tables,pick the “undercover” port on the internet side, and forward to the port 1720 on the Quintum???????
That should acomplish the changing of the port on the Quintum with minimal investment, only around $50 dollars.
Matter of fact, I will have some free time in a couple of weeks, and I will make a test on the lab, just because I want to be sure.