new serial hw - new problem

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Hi,

On Wed, Dec 16, 1998 at 09:10:20AM -0800, Devin Redlich wrote:
> 12/16 08:34:50 r1A    read 64, write 64
> [whole bunch of lines snipped]
> 12/16 08:34:52 r1A    read 23, write 23
> 12/16 08:34:52 r1A  page complete, 9687 bytes sent
> 12/16 08:34:52 r1A  sending DLE '.'
> 12/16 08:34:52 r1A    got:[0a][0d][0a]ERROR[0d]
> 12/16 08:35:05 r1A  got response: 'ERROR'
> 12/16 08:35:05 r1A   fax_send_page("f1.g3") started...
> 12/16 08:35:05 r1A   tio_set_flow_control( HARD )
> 12/16 08:35:06 r1A  fax_send: 'AT+FDT'
> 12/16 08:35:06 r1A  fax_wait_for(CONNECT)
> 12/16 08:35:06 r1A    got:[0a]ERROR: RTN: page bad - retrain requested[0a]
> 12/16 08:35:06 r1A   fax_wait_for: string 'ERROR: RTN: page bad - retrain
> requested'
> 12/16 08:35:06 r1A    got:AT+FDT[0d]

This doesn't look like it's a problem with the serial port.

Actually, there are a couple of problems here, that I assume to be
completely unrelated to the serial port being used:

 - the remote end rejects the page, that's the first "ERROR", right after
   "DLE ." - could be for manyfold reasons, one would have to see how it
   looks like.  I'd blaim a bad phone line, or bad modem firmware [try
   swapping modems, phone lines, and both, to see whether the error
   moves around]

 - your application seems to call "sendfax" with stderr redirected to
   /dev/ttyr1A, which will cause its error messages to go to the modem
   (that's the "RTN: page bad" stuff up there).  Bad idea, if you want
   to redirect stderr, send it to /dev/null.

> 12/16 08:35:06 r1A   fax_wait_for: string 'AT+FDT'
> 12/16 08:35:06 r1A    got:[0d][0a]+FHS:00[0d]
> 12/16 08:35:07 r1A   fax_wait_for: string '+FHS:00'
> 12/16 08:35:07 r1A  connection hangup: '+FHS:00'

And finally, the modem refuses to properly retransmit the page after
"ERROR", so there is something definitely wrong in its firmware.

Does it always happen this way? Or was this a "freak incident"?  What
firmware version do you use?

gert
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Gert Doering - Munich, Germany                             gert@greenie.muc.de
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