ProSBC TechTraining - 160 - Encryption TLS and SRTP

This focused technical training session provides a hands-on walkthrough of implementing encryption protocols TLS and SRTP in ProSBC. Designed for telecom engineers and VoIP administrators, the session begins with the setup and troubleshooting of TLS for SIP signaling—including creating and managing certificates, building TLS profiles, and linking them with transport servers. The training then dives into SRTP (Secure Real-Time Transport Protocol) for encrypting voice traffic, explaining key management, cipher modes, and how the TB Router application handles conversion between RTP and SRTP. Real-time examples with Wireshark, call traces, and TV router captures offer in-depth troubleshooting techniques, ensuring secure VoIP deployments and detailed diagnostic insights. 00:00 – Introduction – Overview of TLS and SRTP support in ProSBC 01:03 – TLS basics – Encryption, TCP-only operation, certificate requirements 02:04 – TLS setup – Key creation, certificate import, TLS profile creation 03:33 – Adding local/remote certificates – Trust structure and transport config 05:10 – Transport server and NAP setup – Linking TLS profiles and interfaces 06:27 – Troubleshooting TLS – Call trace decoding and TLS validation 09:08 – Wireshark trace analysis – TLS detection, decryption mechanics 10:32 – Using TB Router – Deep packet capture and interface monitoring 13:12 – Capturing packet traces – CLI tools for start/stop and trace export 15:23 – SRTP introduction – Dynamic key exchange and version requirements 16:22 – SRTP flow – Cipher handling, encryption modes, and conversion logic 17:21 – SRTP configuration – Secure mode toggle and common error messages 18:52 – Identifying SRTP streams – SDP entries and traffic inspection 20:32 – SRTP troubleshooting – Using TB Router and Wireshark decryption 22:00 – Summary – Recommended practices, tools, and trace analysis About TelcoBridges: TelcoBridges is a leading provider of carrier-grade telecom software and hardware, dedicated to supporting telecom operators and enterprises worldwide. Discover more about TelcoBridges and their flagship products like ProSBC, FreeSBC, and Tmedia at https://telcobridges.com/ LinkedIn: linkedin.com/company/telcobridges Facebook: @TelcoBridges Instagram: @TelcoBridges X: @TelcoBridges Threads: @TelcoBridges