Information From Thin Air: Using SDR to Extract DTMF from Radio Waves
ID: 02e9149d-9125-5652-9ef9-5851bc4bd8b4
STIX ID: report--02e9149d-9125-5652-9ef9-5851bc4bd8b4
Feed Name: Black Hills Infosec Blog
This instructional guide introduces a practical SDR lab focused on transmitting DTMF tones over FM and capturing them with gqrx for analysis. It details recommended hardware (RTL-SDR, HackRF, FM transmitter, audio player), generation of DTMF audio, over-the-air transmission, recording demodulated audio in gqrx, and verification using multimon-ng and Audacity, enabling controlled experimentation with RF signal analysis.
Your team is not currently subscribed to this feed. You must subscribe to it in order to see this post.