Alternative Routing from FXO to IP

You can enable the device to automatically switch the destination of an FXS call from FXO (PSTN) to IP (SIP Trunk) when the PSTN disconnects the FXS subscriber. When a PSTN disconnects a subscriber, the device automatically (or manually through TR-104), recognizes the signal of the call placed by the subscriber and then re-routes the call to a SIP Trunk. This is configured by the [TR104FXOSwitchover] parameter.