I broke IKEA (2023)

Long ago I got a Psion Series 5. One feature was that it could dial a phone number (output the DTMF) for you. Messing around I've day I realized a contact could have a very long phone number. This was also back in the day when answering machines existed and many had a 2 digit code you could punch in to get into the menu from the outside line.

My contact called Answering Machine had a very long phone number that got me into more than one answering machine. Once in, it was fun to change their outgoing message. One friend was convinced that I must have climbed the back of his apartment building to get in the open 3rd story window to change the message. That would have been cool, but a string of DTMF was much easier!

Website doesn't like it if you block third-party content (using uMatrix). It loads and then disappears a few seconds later.

As someone who’s had some incidents with DSP code, the end of the recording sounds like it may be playing some part of memory that isn’t an audio buffer. I wonder if there’s actually a “DTMF injection” possibility here…

Little Bobby Tables strikes again!

From a comment on the blog post:

> iirc it's generated from a script in asterisk, with the delay and tone durations set "short" (I think it was the minimum EIA/TIA DTMF mark/space numbers, not sure.)

> My phone system was Google Voice, through an SIP bridge with Obihai (now defunct/discontinued). Asterisk then made the SIP connection and rang my other phones, a Lucent Partner ACS for my landlines, cellphones, ATAs and forwarding numbers, also over SIP.

> Most of the hardware was lost in the housefire last year. This recording was from early-mid 2020 or so.

https://cohost.org/sirocyl/post/2891449-i-broke-ikea#comment...