SD-Core with IMS: Voice, Video and Messaging through Kamailio and SETU
This demonstration showcases a fully functional IMS voice service operating on an open 5G standalone core, enabling real VoNR and ViNR calls and SMS functionality using commercial handsets over a live 5G SA radio network. The deployment utilizes SD-Core as the 5G core and Kamailio as the IMS, bridged by SETU to translate between Diameter-based IMS signaling and HTTP/2 service APIs exposed by the core. SETU facilitates subscriber authentication and bandwidth allocation without requiring a traditional HSS or policy server, accessing subscriber data directly from the 5G core. The video presents successful registration, voice and video calls, and bidirectional SMS messaging, all achieved with minimal modifications to the stock Kamailio configuration. All components, including SETU and the modified SD-Core network functions, are publicly available for review and replication.