20201028 https://tarxvf.tech/blog/m17_callsign_routing/
20201027 https://m17-deu.xreflector.net/index.php
Handytalky Projekt https://github.com/M17-Project/TR-9
Droidstar Update available M17 implementiert also TX in Codec2
https://m17project.org/faq/
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