Session Border Controllers: Fundamentals

Описание: I explained the role of a Session Border Controller (SBC) in a VoIP system, likening it to the immune system. I clarified that an SBC is a specialized VoIP firewall at the network edge, managing SIP signaling and RTP media. I discussed the need for SBCs to solve problems like NAT traversal, protocol mismatches, and DOS protection. I highlighted the core functions of SBCs, including security, interoperability, control, and resiliency. I also mentioned the importance of security and resiliency in SBCs. I then discussed the deployment models of SBCs, including on-prem appliances, virtual SBCs, and cloud SBCs. Finally, I provided example scenarios of SBCs in use, such as protecting VoIP from ransomware spread in hospitals and connecting Microsoft Teams phone to a legacy PBX in enterprises.