The sysmocom team has been working on implementing an open source GPRS modem for DARC on behalf of a grant by ARDC. This talk will present the current state of the implementation and demonstrate how to use it.

Summary of the architectural changes done over osmo-pcu code base over last years, what we accomplished and possible next steps.

This is a session in which we will try to summarize some of the experience we've gained with using open5gs over the last few years.

The idea is to sched some light on what we believe could be improved from the user point of view.

After working on it on and off during 2023, we finally have a working ePDG in the Osmocom universe. Let's have a look at its internal architecture, how it integrates with other network elements and have a look at a demo and protocol traces.