Hi, Mark.
 > IC> When receiveing data there is no problem, but when uploading a
 > IC> file, any character 19 will make the modem to freeze. Even
 > IC> Ymodem or Xmodem protocols can trigger that when they arrive to
 > IC> block 19. That's why we have to go to command mode and disable
 > IC> flow control in the modem before uploading.
 ML> sounds like a program desigh flaw...
I don't think so. The only thing we can reproach the author for is not 
having implemented hardware flow control.
 ML> characters can be and should be "escaped" when they are actually
 ML> data and not control...
The only attempt I know of doing that was by Hayes with their 
"Transparent XON-XOFF Flow Control" and &K5 command. Could you tell me 
which programs and/or protocols you know that support it and quote the 
part of the manuals or docs where it's stated?
 ML> i'm not sure i can really explain it to you and this is definitely
 ML> not the proper place for this type of technical discussion but it
 ML> is what must be done and it is how the entire communications
 ML> industry does it...
Since you say that it's "how the entire communications industry does 
it..." and that "this is definitely not the proper place for this type 
of technical discussion" you could try to explain that in the COMM echo. 
That type of discussion certainly is welcome there. And don't forget to 
give your sources.
Ismael
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