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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