Mixpbx scenarios interconnecting sites
From MIXvoip wiki
No matter how the MixPBX is used, gateway, hybrid solution or full features PBX, it can be used to interconnect different sites and communicate for free. MIXvoip's intelligent routing detects internet downtimes and internet latency problems and routes call over the working connection without any intervention from the user. Even when two different sites have no internet at all the MixPBX know how to route calls.
