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ATL0 was a great command that muted the modem so that your parents couldn't hear that you were dialing up. :-)

Oh wow, now I feel old.

Wasn't ATH0+++ used to cause modem users to hangup via IRC CTCP requests? Good days.


A popular multi-line BBS back in Colorado had one faulty modem and if you were to post that in chat the person on that line would get disconnected... good times, good times.


It probably had a modem that didn't pay Hayes to license the patent on enforcing a delay in switching from data mode to command mode (+++ did that, and then ATH0 was the AT command to hang up the phone -- normally you'd have to wait a couple seconds, type +++, wait a couple more seconds, and then you'd get an OK and could type AT commands).



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