Session border controller (SBC) plays a major role in security, interoperability, and transcoding. The main function of the Session Border Controller is to secure and control the real-time communication calls or sessions over SIP-based VoIP infrastructures. It is deployed to protect SIP-based voice over Internet Protocol networks.

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Take a look at the differences between the functioning and use of sbc vs firewall. Read and decide which one is best for your business.