Security & Compliance
Perimeter Defense & Topology Hiding
Ref: IETF RFC 5853 / RFC 3261 / RFC 3550
Carrier SBC
Session Border Controller (SBC) Network Demarcation & Security Switch
Direct Telecom Definition • Carrier Industry Standard
Carrier-grade Session Border Controllers deployed at network perimeters to protect IP telephony infrastructure against DDoS attacks, SIP toll fraud, topology leakage, and protocol anomalies.
Technical Definition & Carrier Engineering Standards
A Session Border Controller (SBC) acts as the secure voice firewall at the boundary between private carrier networks and external untrusted IP networks. AVM Networks deploys active-active clustered SBC nodes that perform Back-to-Back User Agent (B2BUA) media bridging, TLS/SRTP encryption, SIP header normalization, NAT traversal, and real-time rate limiting to defend against volumetric SIP floods and illegal robocalling.