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Often I get a 3GPP related network trace (pcap), and have to manually gather leads to find out what exactly is going on in it. I have tried different ways to automate the analysis part, and will share what I ended up with.\n\nI'll show my little tools that I played with to trace and visualize GSM network activity.\nImmature as all of it is, maybe it is interesting to share and form a vision of a helpful tool.\n\nFor example, when the task is to find out: at which network edge of a call leg do the RTP packets drop.\nFirst I need to know the chain of RTP ports that one particular subscriber uses.\nThen I need to count RTP packets arriving at each of them.\n\nAnother example, there are a bunch of {PFCP,MGCP} conversations, setting up the user plane vectors.\nAre all the ports configured correctly? I have to read through the entire {PFCP,MGCP} session to overlay all the bits that form the final result.\n\nAnother example, in a very active network, a particular voice call has a problem. How do I efficiently examine only those packets that are directly related to this particular TMSI / IMSI / RTP packet / RSL-ChanRef / ...\nabout this event: https://pretalx.sysmocom.de/osmodevcon2024/talk/QRBB9Y/