We recently had issues with our power supply and broadband lines to our office, which meant our phone system was unreachable. We want to put a fail over server in place (probably within our Cloud VLAN) which would be an duplicate of our system that we could switch to in event of issues at our office. The only difference would be that it use only our VOIP lines not our ISDN lines. The two systems would never run at the same time, it would be one or the other, are we ok to use our one 3CX licence on both installs? Gary.