Understanding Session Border Controller
A Session Border Controller, or SBC, is a network device that operates at the boundary between two different communication networks, ensuring smooth and secure multimedia communication sessions. Acting as a bridge, SBC manages signaling and media streams, enabling seamless communication between various entities, such as VoIP networks, IP-PBX systems, and SIP trunk providers. SBC are designed to address key challenges associated with VoIP and other real-time communication protocols:
SBC protects communication networks from potential threats, including denial-of-service attacks, toll fraud, and eavesdropping. They act as a firewall for voice and video traffic, safeguarding sensitive data.
In heterogeneous communication environments, they provide protocol translation, ensuring that different communication platforms can understand each other’s signaling and media requirements.
3. Quality of Service (QoS):
It helps maintain the quality of communication by monitoring and controlling bandwidth usage, prioritizing traffic, and managing network congestion.
4. NAT Traversal:
Network Address Translation (NAT) can disrupt the flow of real-time communication sessions. They manage NAT traversal, allowing devices behind different NATs to communicate effectively.
5. Media Processing:
They can perform media transcoding, translating media streams between different codecs and formats, ensuring compatibility between endpoints.
6. Call manipulation:
This feature enables to control and modify various aspects of VoIP and real-time communication sessions. SBC typically manages and secures VoIP and multimedia communication sessions between different networks, such as a private corporate network and the public internet. It involves Codec Translation & Transrating, Overlap / En-block Conversions, IP Address & Port Blocking, Black/White List and many more.
7. Call Routing:
It involves efficiently routing calls by using multiple SIP registrars for different server connections, setting up backup routes with multilevel alternative routing, monitoring call quality via QoS monitoring, and customizing call details such as headers and numbers to facilitate better management.
8. Self-Learning VoIP Firewall:
Using machine learning, this feature utilizes real-time detection and prevention of evolving security threats for enhanced network security.