DCS not recognized

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Hi,

On Mon, Nov 09, 1998 at 03:22:42AM +0100, Michael Reinelt wrote:
> I get the following problems, but only with few fax machines:

It's a well-known problem.

> 11/08 10:32:43 modem   mdm_gis: string 1: '3361'
> 11/08 10:32:43 modem   mdm_identify: string '3361'
> 11/08 10:32:43 modem  USR Courier/Sportster V.34(+) detected
> 11/08 10:32:43 modem  mdm_send: 'ATI3'
> 11/08 10:32:43 modem   mdm_gis: string 1: 'USRobotics Sportster Voice
> 33600 Fax Rev. 2.0'

This is the problem (read the docs - USR Sportsters are BAD).

> 11/08 10:33:46 modem  fax_id: '+FCI:"                    "'
> 11/08 10:33:46 modem   fax_wait_for: string '+FIS:1,3,0,2,1,0,0,4'

The receiver says "I'm slow".

> 11/08 10:33:47 modem   fax_wait_for: string 'AT+FDT'
> 11/08 10:33:47 modem   fax_wait_for: string '+FCS:1,3,0,2,0,0,0,0'
> 11/08 10:33:47 modem  transmission par.: '+FCS:1,3,0,2,0,0,0,0'

The sender says "I don't care, I'm fast (trailing ",0")", so the receiver
refuses the TCF frame.

> 11/08 10:33:53 modem  transmission par.: '+FCS:1,3,0,2,0,0,0,0'
> 11/08 10:34:00 modem  transmission par.: '+FCS:1,3,0,2,0,0,0,0'

This is repeated three times, ...

> 11/08 10:34:06 modem   fax_wait_for: string '+FIS:1,3,0,2,1,0,0,4'
> 11/08 10:34:07 modem   fax_wait_for: string '+FHS:26'

... and then the sending modem gives up.

> 11/08 10:34:07 modem  connection hangup: '+FHS:26'
> 11/08 10:34:07 modem   (DIS/DTC received 3 times; DCS not recognized)**
> found **

... with an IMHO bogus error message.  Correct message, IMHO, is +FHS:25
("DCS sent three times without response"), which is returned by other
Sportster variants.

Please do the following:

- upgrade your modem to the very latest firmware version available
- try again, if it fails again, send a log file *WITH THE TELEPHONE
  NUMBER IN IT*, and the output of the "ati", "ati1", ..., "ati10" 
  modem commands.

- I will then forward your report to my contact persons at USR.  But that
  will only achieve anything if you already have the latest firmware
  (because otherwise the answer will be "upgrade to the latest firmware").

gert
-- 
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Gert Doering - Munich, Germany                             gert@greenie.muc.de
fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de