This should not be a problem unless some of
the data containes the excact string "AT" followed by data, and
none of my data consist of such a number combination.

So the question remains.. Why does it hang up during incoming call
when it's RS-232 input is nowhere near an AT command?
Is that the problem that it is not an AT command, in that case, why
hang up, instead of ignoring the input as usual?

>>
>So if I understand correctly, you are sending data to the modem all the
>time, even if it isn't "on-line".  IMHO this isn't a good idea.  If your
>data ever included valid AT commands (whether you put them there on not) you
>could seriously screw up the settings on this modem.  You really should be
>checking at least the Carrier Detect line and maybe the CTS line.
>
>Mike


Steinar Olsen
Electronics Engineer
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