I need your help to find a solution to this scenario.
We have 2 CTS 3xxx systems located each in a different site within a same company.
I wanted to know how to configure these two systems to communicate if the only network between the 2 sites is the Public Internet.
We have a CUCM for call control.
I was thinking about VCS Expressway but this system cannot be used with the CTS 3xxx series systems.