Grandstream WP820 and 3CX Setup

This information was not developed by me- thanks to Wayne Driver and Ben Smith for this info. I’ve added the ‘remote server’ section at the bottom The following was done with phone system on LAN, settings will differ if your phone system is on WAN....

engin

Today I received an email from engin saying they were about to do a network upgrade and I would have to change the outgoing proxy on my voip device. This is the sort of thing that would normally send shivers down your spine because of all the things that can go wrong....