extension to extension

  1. 2 separate 3CX system onsite at each location, extension to extension routing between the two separate systems?

    We have a prospect customer that is looking to have two separate 3CX systems set-up. The configuration is to have a physical 3CX at each site, onsite. But the customer wants the ability to have extension to extension routing between the two separate systems. I want to know if this is...