Home / Series / Chaos Communication Congress / Aired Order / Season 39 / Episode 62

Chaospager - How to construct an Open Pager System for c3

In this talk, we will give an introduction into the project (i.e. how it all started at 38c3 and why we are here now), provide an in-depth review of how the development process of our pager worked and what our future goals are. In our introduction, we will talk about the origin and exploration phase of the inital pager idea (i.e. how we went from the idea of bringing POCSAG Pager transmitter to 38c3, over a cable-bound prototype, to a first working pager on a proper PCB). We will also present our plans of connecting our POCSAG transmitter infrastructure to THOT (CERTs own dispatch software). For our in-depth review about the project, we explain how we encountered major reception problems, how we analyzed them at easterhegg22 and conducted experiments there, and why we are opting for a custom HF frontend design instead of an already-made one from chinese vendors. Moreover, we provide an overview of our transmitter devices and give some advice on how to replicate those.

English
  • Originally Aired December 28, 2025
  • Runtime 40 minutes
  • Production Code 2015
  • Created December 22, 2025 by
    r4m3u5
  • Modified December 28, 2025 by
    r4m3u5