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Our Setup
Inspiration
We were bothered by the lack of unlimited data in phone service plans in the US. Therefore, we devised a modern solution based on the old method of dialup connections over the phone lines
What it does
We use FLDigi to convert a piece of text to an audio signal. That signal is then sent through our modified cable to the audio input of a phone and received by a phone on the other end of the call, where it is then reversed back to text.
How I built it
We connected our phone and computer to our custom modified TRSS cable and sent audio through it. We also had to develop our own protocols for sending packets and error-correcting them.
Challenges I ran into
It took a while to find the optimal frequency and communication protocol for efficient and error-free packet transmission.
Accomplishments that I'm proud of
We completed a hardware hack that most of us lacked experience with previously.
What I learned
We learned how to do low level (level 1 & 2) network programming with hardware.
What's next for Dialup Unlimited
We want to implement it with the TOR network in order to allow people with restricted resources access to the internet.
Built With
- custom-trrs-crossover-cable
- fldigi
- python
- pytun
- scapy
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