What is a Session Border Controller? A Session Border Controller sits at the boundary between internal and external IP networks, controlling, protecting, and monitoring real-time communication such as VoIP calls. It terminates and mediates SIP signaling as well as media streams, providing central functions for security, routing, quality, and interoperability. Typical SBC tasks include protection against fraud and Denial-of-Service attacks, bandwidth and codec control, and hiding the internal...

The security of VoIP telephony is no longer a niche topic. Voice communication is now a business-critical component of IT and UC infrastructures – and thus an attractive target for attacks. Enterprises, service providers, and government agencies face the challenge of reliably ensuring the availability, confidentiality, and integrity of their voice services. VoIP Security "Made in Germany" stands for technically mature, transparent, and trustworthy security architectures specifically developed...

Modern organizations increasingly rely on IP-based communication. However, particularly critical infrastructure depends on highly available and secure VoIP telephony. An outage or security incident here can have immediate impacts on operations, supply, or public safety. FRAFOS secure VoIP telephony therefore combines multiple technical layers: Session Border Controller (SBC), monitoring, encryption, access controls, and secure WebRTC gateways. Only through this combination can VoIP systems be...