Re: plus plus plus [was: PPP bug]

Mike A. Harris (mharris@ican.net)
Mon, 8 Feb 1999 05:40:18 -0500 (EST)

On 8 Feb 1999, Miquel van Smoorenburg wrote:

>>>
>>> 7On Mon, 1 Feb 1999, Alan Cox wrote:
>>>
>>> > The sequence in question is "+++".
>>
>>Just tried this on a telnet through a pissy 28.8k modem :
>>
>>echo "+++"; sleep 3
>>
>>The connection's still fine.
>
>That's because on most modems the sequence of death is actually
>
> + + + A T
>
>(spaces added to prevent the obvious). Even worse, ofcourse, is
>
> + + + A T H 0 <CR>
>
>The modems do detect the three pluses but do expect a valid command
>or at least the letters AT directly after it

If I go online with any of the modems I have here using minicom,
and then type "+++", the modem goes into command mode
immediately. No "AT" is needed. In order to do anything useful
from thereon of course one needs to enter AT commands, but as
soon as +++ is entered, the modem instantly responds with "OK".

--
Mike A. Harris                   Linux advocate      GNU advocate
Computer Consultant                          Open Source advocate  


News for nerds, stuff that matters:           http://slashdot.org




-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/