Jonathan Walther <[EMAIL PROTECTED]> wrote:
> For the second time in a couple of months, I have had a problem retreiving a
> mail message from this list that contains the modem commands to switch to data
> mode and hang up the phone. The command in question involves three plus signs
> followed by ATZ. (I don't list the command here explicitly for fear that the
> problem will recur.)
...
> I guess I am surprised that no one else on this list has experienced this
> problem and reported it. Maybe it *is* my ISP's problem....
>
> Does anyone have any ideas?
It definitely is your ISP's problem.
I could bet that they use discrete modems, as those are
especially vulnerable to this problem. (ISPs using
integrated dialin servers, e.g. Ascend/Lucent/whatnot
systems, don't usually exhibit this problem.)
Furthermore, if they use 'cheap clone modems', those likely
don't have properly written escape sequence processing -- which
requires a period of idleness before and after the escape
characters. In PPP frames there never appears a set of
those escape characters with surrounding idle periods,
thus PPP users *should* always be safe from it.
Unfortunately that idle-period thing is patented, and
thus the cheap clones usually try to get by without it.
They (your ISP) should disable the '+' from escaping their
modems into the command state.
> jw
/Matti Aarnio <[EMAIL PROTECTED]>
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