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!
3/5/2022: New number! KP+056+ST for "Lenny". Lenny is designed to drive telemarketers crazy. Try to sell him something.
Anonymous callerid on incoming calls is no longer permitted. Calls subject to monitoring and/or recording to prevent abuse.
Added in a link to the old hardware blue box on the blue box hardware page - December 7, 2020
Updated the 12F683 "old" blue box software to latest version - January 27, 2021
Donations gratefully accepted and help offset the cost of high-quality PSTN connections, power, and equipment maintenance.
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
for a gentler introduction if the above makes no sense to you.
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!
Please see the
Project MF Blue Box
page for details on building your own blue box.
Project MF is a set of modifications ("patches") to the open-source
Asterisk PBX software to support in-band
The original Project MF patches were developed by Mark Abene, aka Phiber
Optik, in 2005. Since that time additional patches have been developed
that make ProjectMF behave a little bit more like the old telephone
network, including "wink back."
You don't need to run your own Asterisk or Project MF server
to enjoy Project MF -- you can just dial in to our public server.
But, if you'd like to set up your own server, the patches can
be found on our
Project MF Asterisk Patch page.