During Open Source Mobile Network Technologies (OSMNT) Conference, on April 17, 2024, Elena-Ramona Modroiu (senior researcher at TU Berlin AV and Kamailio co-founder) together with Daniel-Constantin Mierla (lead developer and co-founder Kamailio, asipto.com) demonstrated live the first VoNR and SMSoNR done over a local 5G Stand Alone private network built with open source only.

A news article has been published by the Open6GNet project from TU Berlin AV, the organizer of OSMNT’24 conference:

In that article you can see a couple of screenshots and the video recording of the same demo, but done at TU Berlin AV lab.

The SIM cards of the UEs were programmed with PySIM, the radio access was managed by srsRAN, while the 5G core network and IMS were built with Open5GS, Kamailio and PyHSS.

Kamailio P-CSCF instance interacted with Open5GS directly using N5 interface for QoS and policy control, while Kamailio S-CSCF instance and PyHSS were used together for service and application routing policies. Two other Kamailio instances were used to perform the functions of I-CSCF and SMSC.

The live demo at OSMNT’24 was possible given that the venue was covered by private 5G testing license. At Kamailio World Conference 2024, a video recording of the same demo was presented by Elena-Ramona Modroiu, the location not being covered by a private 5G testing license. Next is the video with the demo:

Elena-Ramona Modroiu’s presentation at Kamailio World 2024, in which the video recording of the demo was shown, is also available on KamailioWorld YouTube channel:

Since 2001, first as SIP Express Router (SER) project, Kamailio continues to be the innovation leader in SIP-based Real Time Communications for fixed (VoIP) and mobile networks (VoLTE/VoNR).

As a matter of fact, Kamailio has IMS extensions for more than 10 years, being so far the only viable option in the open source space for 3G/4G/5G and VoLTE/VoNR. It has been the reference that helped many entities world wide to design and develop their products and services for RTC on mobile networks, and the inspiration for the others trying to add similar features.

Thanks for flying Kamailio!