What happens to a connection between PBXs if the internal LAN breaks?
In case of fault of the internal LAN during a connection between PBX subscribers, the VoIP telephone service is lost and the isolated PBX recognises that the trunks used for IP Trunking are always busy. If the PBX is configured for PSTN overflow, the private calls will be routed automatically over PSTN until the LAN is restored.
