Session Border Controller (SBC) - Real-Time Communication on AWS

Session Border Controller (SBC)

A session border controller (SBC) sits at the edge of a voice network and keeps track of all incoming and outgoing traffic (both control and data planes). One of the key responsibilities of an SBC is to protect the voice system from malicious use. The SBC can be used to interconnect with session initiation protocol (SIP) trunks for external connectivity. Some SBCs also provide transcoding capabilities for converting CODECS from one format to another. Finally, most SBCs also provide NAT Traversal capabilities which aids in ensuring calls are established, even across firewalled networks.