Automatic fallback is used in the following situations:
- The maximum number of parallel VoIP connections has been reached (all VoIP lines are in use)
- The SIP server for the VoIP connection cannot be accessed (i.e. registration failed)
- The dialled VoIP connection has not yet been configured or has not been configured correctly (e.g. incorrect password, missing mandatory fields)
- The base station does not have a connection to the Internet, for example, because your router is disabled or not connected to the Internet (LAN cable unplugged)
Exceptions when Fallback is not initiated:
- The VoIP call is initiated through the "Select Line" menu
- The Fixed Line is not plugged in