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by greggsy 849 days ago
There’s a comment in the post that offers a plausible explanation
1 comments

The comment (from the author):

> shared it with a few people who Know Telephone before I posted it here, and their theory is that what we're hearing at the end is the audio path going open-circuit when the PC crashed. It probably blue-screened, and we're hearing the EM interference from the CPU or I/O controller hub as Windows writes a minidump, then begins waiting for a debugger to attach (the blerps at the end being scans for connected serial port, PCI, network or 1394 debug hardware)

This isn't Win9x, it shouldn't bluescreen just because some userspace program interpreting DTMF tones screws up.
It depends what is crashing. Audio drivers in WinXP were in kernel space IIRC.