Businesses connecting their infrastructure to a SIP Trunk, or VoIP connection will primarily use an SBC to protect their VoIP network, as well as for interoperability, transcoding, and failover of their voice network.An SBC is a device that sits between your internet connection and corporate network and analyses all the VoIP traf¬fic that passes through. It is designed with security features to detect malicious VoIP traf¬fic and automatically take action to save your network.