[malermeister]

Might be a fun follow-up to try and decode whatever's in there.

[lgats]

didn’t have much luck with multiple baud rates and modulations on minimodem, no discernible ascii, but someone might have more luck looking at the binary output

[ajxs]

It wouldn't be encoded in a modem protocol. If that's indeed binary data, then most likely we're hearing binary data interpreted as being PCM wave data.

[jojobas]

That would almost certainly be damaged by phone line bandwidth and voice machine compression.

[greggsy]

There’s a comment in the post that offers a plausible explanation

[darkwater]

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)

[rep_lodsb]

This isn't Win9x, it shouldn't bluescreen just because some userspace program interpreting DTMF tones screws up.

[darkwater]

It depends what is crashing. Audio drivers in WinXP were in kernel space IIRC.