# Credits, license, and project history

## Credits and lineage

**ADN Systems DMR Peer Server** is derived from **FreeDMR**, reorganised with **clean architecture** (domain, application, infrastructure) and ADN-specific features: scheduled announcements, **TTS**, on-demand voice, **`adn-voice.yaml`** merge, TCP reporting to **ADN Monitor**, integration with **`adn-mon.yaml`**, self-service, hotspot proxy, and more.

**[FreeDMR Peer Server](https://gitlab.hacknix.net/hacknix/FreeDMR)** is by **Simon Adlem, G7RZU** ([hacknix](https://gitlab.hacknix.net/hacknix/FreeDMR)).

**[hblink3](https://github.com/HBLink-org/hblink3)** — HBLink for Python3. Copyright (C) 2016-2020 Cortney T. Buffington, N0MJS n0mjs@me.com.

## License

This project is distributed under the **GNU General Public License v3** (or later), consistent with FreeDMR and related stacks. The full legal text is in the repository (`LICENSE`, and `COPYING` where present).

## See also

- [Introduction](introduction.md)
- [Architecture](../development/architecture.md)