Initialize the console environment and verify that all library links and system drivers are loaded correctly by the kernel. The configuration audit checks permissions and verifies connection endpoints.
Start the packet capturing engine or analysis module. Enumerate accessible interfaces and configure the target capture flags. The software sets up buffer spaces to prevent packet loss during capture sessions.
Run the signaling parser or debugging routines. Export logs to standard formats for analysis and visualization. Captured frames are saved to disk with appropriate metadata tags for retrospective inspection.
Operating Software-Defined Radio (SDR) hardware for cellular sniffing or transmission requires strict compliance with international radio frequency emission guidelines. Broadcasting signals on licensed cellular bands (GSM, LTE, 5G) without government authorization (FCC, OFCOM) is a severe offense in almost all jurisdictions. All active signal generation or transmitter testing within GNU Radio flowgraphs must occur inside Faraday cages or shielded RF chambers.
When building receive-only flowgraphs for passive spectrum monitoring, ensure your GNU Radio pipeline does not log or store decoded user data payloads from live cellular broadcasts. Restrict capture sinks to logical broadcast channels — such as System Information Blocks and paging indicators — and avoid writing intermediate frequency recordings that capture private subscriber communications to persistent storage.
You've executed the basic steps for srsRAN — Open-Source 4G/5G RAN. The TelcoSec Academy offers full hands-on simulation labs, baseband source code auditing, and deep cellular signal processing certification courses.