Modern VoIP systems are totally dependent on the Internet to function properly. However, if there is an internet failure, the Providers of the VoIP service have fallback facilities. Thus, companies can define what needs to happen when the target device is not online.
So, technically, the VoIP system can still run while the internet is down. This mechanism is called failover protection and can be activated without any human intervention. It means other options are considered in such a case, backup lines are attached that are analog lines for routing calls when there is no internet. As soon as the internet is up and running back again, the phone lines will be connected to Digital. Thus, the Hosted system maintains a smooth flow of communication and makes sure no calls are missed while there are technical issues including the internet being down.
Get in touch with a MachCloud expert to know better and explore about VoIP systems and failover mechanism.