Multiple trusted Crux units, across same or different networks, can be daisy-chained to form a larger trusted exchange to form a closed loop communication group (also called CUG - closed user group), even over internet. This configuration does not necessarily need a VPN connection, though having it over VPN is recommended for data security and privacy reasons.
When deployed in this configuration, your New York city office can call London office as though making an intercom call within office though it will be routed over internet. Individual users can also connect to the Crux device in their office, even when not in office but connected to internet. In such a scenario, the user can make and receive calls even from outside, as though they were still present in office.
