You cannot install two Phone Systems on the same machine. You need to install the version then take a backup and then un-install it and so on. If you need to retain your call logs you need to stay on above way, V12 latest service pack to V12.5 latest service pack to V14 latest service pack and then V15 latest service pack.Should i uninstall the v12 first (after making the backup of the data of course) or should I just install the new version while the 12 is still there
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.