The SBA app is a software extension for beroNet VoIP cards and beroNet VoIP gateways. SBA stands for Survival Branch Appliance. The gateway can be used with the help of the app as an emergency telephone system in the following emergency situations: • the main system fails • VPN / Internet connection to the central falls out • Internet connection for Hosted PBX falls ausOhne the SBA Cruises remain in failure situations still functional phones at the respective locations, but which can no longer reach each other and also not reachable from the outside sind.Die SBA app ensures that the phones are registered with the gateway at the respective locations on site. The SBA app connects the phones via the gateway so that these together and remain accessible by phone from outside.