abstract:A session border controller (SBC) is a device regularly deployed in Voice over Internet Protocol (VoIP) networks to exert control over the signaling and usually also the media streams involved in setting up, conducting, and tearing down telephone calls or other interactive media communications.
Traditionally sold as a hardware box, a sessionbordercontroller is designed to handle the heavy lifting required to reliably transmit voice calls and other media over an IP network, while also protecting networks from malicious attacks.