We have a voice network that is completely separate of the data network (due to some security restrictions). Both networks are connected to the internet. We have a CUCM v6.1.3a.
I wonder if it is possible to use Webdialer/Click2Call widget on desktops in the data network. The voice network has a firewall that can do Network Address Translation.
Is Webdialer through NAT possible, and if so, which port(s) do we have to open?