ProjectMF Blue Box Phreaking Demo




Project MF is a living, breathing simulation of analog SF/MF telephone signaling just as it was used in the telephone network of the 1950s through the 1980s. It lets you "blue box" telephone calls just like the phone phreaks of yesteryear ... except that it's totally legal!

A blue box is an electronic device that replicates the tones that were used to switch long-distance telephone calls. They allowed you to route your own calls and bypass normal telephone switching and billing. Blue boxes no longer work in most countries, but they can still be used with Project MF!

The ProjectMF server can be accessed via the PSTN on 630-485-2995. The switch will play back recorded instructions when you dial in. You must have a blue box handy and understand how to use it to have any fun with this.

Please see the Project MF Blue Box page for details on building your own blue box, especially if you received a blank PCB at The Last HOPE conference.

More info at

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    4 Discussions


    10 years ago on Introduction

    Epic-ness. When I was using an ATM on holiday it used dial-up or some method of tones to transfer data, I feel something evil.


    10 years ago on Introduction

    Is that a thin client terminal?? WYSE..... UMMMM On the NIC card you have there could that be used as a connection point between a server and a thinclient terminal?? Cuz i want thinclient terminals in my home but I have never figured out what that card was called.

    1 reply

    Reply 10 years ago on Introduction

    Ooops I had only watched 2mins of it, after that u explained it. How did you modify the terminal? You have to tell me how.....!!!!! Thnx

    I wish we weren't up against stumbleupon! Instsructables got my vote, of course, though,