ProSBC TechTraining - 155 - SIP Registrations

This in-depth training session focuses on SIP registration forwarding in ProSBC, covering both fundamental architecture and advanced configuration. The video explains how the SBC transparently forwards registration requests from SIP phones to external registrars, using mechanisms like active-standby switching, contact remapping, and domain-based routing. Attendees learn how to create SIP domains, manage multiple registrars, adapt registration refresh rates, and allow subscriber functions like SUBSCRIBE and NOTIFY. The session includes live examples of SIP traces, configuration walkthroughs, registrar diagnostics, and tools for registration troubleshooting—ideal for VoIP engineers and IT professionals deploying hosted or multi-tenant SIP systems. 00:00 – Introduction – Overview of registration forwarding in ProSBC 01:03 – SIP registration relay logic – Public to private registrar handoff 02:04 – Active vs. standby registrar switching – Failover mechanics 03:33 – Registration refresh intervals – Optimizing inbound and outbound timers 05:10 – Multi-domain handling – Matching SIP domains to proper registrars 06:27 – NAP and domain mapping – Linking SIP requests to destination registrars 07:38 – Registration call flow – 401/407 auth relay and SBC transparency 08:56 – Contact remapping vs. pass-through mode – Hiding phone IPs 10:32 – Domain-specific registration refresh – Reducing registrar load 12:20 – Failover to standby registrar – Auto-switching on timeout 13:55 – SUBSCRIBE/NOTIFY support – Transparent message handling 15:30 – SIP domain creation – Routing and registration mode selection 17:00 – Domain and registrar NAP linking – Setting access rules 18:35 – Domain configuration – Prioritizing registrars and inbound access 20:30 – Routing after registration – Mapping phones to PBX and vice versa 22:03 – Forwarding subdomain usage – Sharing registrar across domains 23:45 – Registrar monitoring – Domain status, user stats, and polling 25:45 – Registrar-level status – Up/down state, delay, and load 27:00 – SIP trace tools – TB SigTrace usage and registration trace paths 29:15 – Trace analysis in Wireshark – Unauthorized and 200 OK messages 31:30 – Final registrar configuration – Domain entry, registrar linking, NAPs 33:15 – Authorization and call permission – Enforcing registration before routing 35:20 – Wrap-up – Summary and final remarks Slides can be downloaded from: https://www2.telcobridges.com/l/45842/2020-03-16/8cszst More on ProSBC at: www.prosbc.com 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