[Full-Disclosure] Ancient Trivia: +++ath0

This is a bit of ancient trivia that came up over lunch today. I
thought maybe y'all could offer some insight.

As the old BBS'ers and even older folks know, the string "+++ath0" will
disconnect a modem. Once upon a time, I had this string in my e-mail
signature. Some folks using Windows and a dialup line couldn't respond
to my e-mail, even though the e-mail was being sent via PPP and all that
good stuff. Everyone could receive the mail, though, so I'm assuming
that the ISP was was running a decent implementation of PPP -- although
since I haven't used modems in years, I can't rule out that the ISP was
using some sort of non-Hayes modem.

Does anyone know what versions of windows had this particular bug in the
PPP implementation? Were any other systems affected?

Thanks,
-Luke

P.S. Oh, yeah, just for laughs:
+++ath0

-- 
Luke Scharf, Systems Administrator
Virginia Tech Aerospace and Ocean Engineering
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