ecwilson said:The 3CX server is not the problem, it is where your phones are located
& if they are not using public ip's then the router/nat has to have the
ports open in order for the phone to work with the server. Their is a list
of ports that need to be opened. Look in the forum for them.
ecwilson
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.