Hello Johannes, FYI, there already was a discussion about GSMTAPv3: https://www.youtube.com/watch?v=vum9jzavZi0&list=PL07C78AF831FFE8F9&index=10 but unfortunately, nobody has invested time into this (yet?). > 1) Why the design with encapsulating it in UDP? This gives us a possibility to "demux" multiple GSMTAP streams on the receiving side, e.g. if you are running multiple processes. > 2) The format of gsmtap doesn't seem very extensible [...] ACK. I definitely support the idea of using TLVs. With best regards, Vadim Yanitskiy.