Subject: Weird Problem with Recent Message
Date: Wed, Mar 03, 1999 at 10:21:34AM -0700
In reply to:Jonathan Walther
Quoting Jonathan Walther([EMAIL PROTECTED]):
>
> 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.)
>
> When I try to retrieve the message from my POP-3 mailbox on my ISP's machine, my
> connection to the ISP is broken. I had a friend put the same message on our
> website, and when I tried to 'get' the document, my connection was broken again.
>
> I dial into my ISP using my Linux box (Redhat 4.2).
>
> It seems for all the world that the modem at my ISP is intercepting the three
> pluses, going to command mode, and then hanging up, but I cannot tell exactly
> which side is hanging up.
>
> All things being the same, it seems unlikely to me that my ISP is so messed up
> that you can't send a string containing three plus signs through it. On the
> other hand, I can't figure out how my Linux box might be causing the problem,
> since it seems equally unlikely that my modem is scanning incoming data looking
> for commands...
>
> I have read the relevent Linus-PPP documentation and have tried using the
> 'escape' keyword to escape the "Z" character (since you can't escape the plus
> sign, and asyncmap is for control characters only), but this seems to have no
> impact other than generating an error message: "ioctl(set extended ACCM):
> Invalid argument"
>
>
> 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?
>
>
> jw
>
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>
I recall a thread on the linux-ppp list a few months ago about this.
IIRC it had to do with the 3 +'s causing some modems to switch into command
mode. There was a fix. I seem to recall it was an s register setting
that had to be set to 127 or 128 to increase a delay time st that 3
+'s in a row didn't cause the mode switch. I don't know if there is
an archive for that list but your question there might get the correct
answer. Checking my Modem manuas it _might_ be S12,
@12 default 50 Sets the duration, in fifieths of a second, of
the guard time for the escape code sequence
(+++).
HTHi
Wayne
--
User n.:
A programmer who will believe anything you tell him.
_______________________________________________________
Wayne T. Topa <[EMAIL PROTECTED]>
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