SBC (Session Border Controller)

A Session Border Controller (SBC) is a device that manages and secures communication sessions—like voice calls or video chats—going over a network. It acts as a gatekeeper at the network boundary, ensuring that only authorized calls pass through, while protecting against security threats and managing traffic congestion. SBCs also help connect different networks smoothly, maintaining call quality and compatibility between various systems. Essentially, they provide security, quality control, and interoperability for real-time communications across internet or private networks.