Re: [hylafax-users] MODEM Command Error

["George H" <george.dma@xxxxxxxxx>]

I applied the work-around command to my config.ttySx files.

I do not get the MODEM Command error messages anymore but I get some
failed faxes in the logs like the below. I still get normal faxes most
of the times.

May 08 08:32:03.22: [20266]: --> [2:OK]
May 08 08:32:03.22: [20266]: <-- [9:AT+FRH=3\r]
May 08 08:32:10.23: [20266]: --> [0:]
May 08 08:32:10.23: [20266]: MODEM <Empty line>
May 08 08:32:10.23: [20266]: MODEM TIMEOUT: waiting for v.21 carrier
May 08 08:32:10.23: [20266]: <-- data [1]
May 08 08:32:10.28: [20266]: --> [2:OK]
May 08 08:32:10.28: [20266]: DELAY 70 ms
May 08 08:32:10.35: [20266]: <-- [9:AT+FTH=3\r]
May 08 08:32:10.43: [20266]: --> [7:CONNECT]
May 08 08:32:10.43: [20266]: <-- HDLC<32:FF C0 04 B5 00 AA 12 9E 36 86
62 82 1A 04 14 2E B6 94 04 6A A6 4E CE 96 F6 76 04 AC 74 8C 74 4C>
May 08 08:32:10.43: [20266]: <-- data [32]
May 08 08:32:10.43: [20266]: <-- data [2]
May 08 08:32:12.45: [20266]: --> [7:CONNECT]
May 08 08:32:12.45: [20266]: <-- HDLC<23:FF C0 02 4E A6 6E 4E A6 CA 04
1E 86 62 04 B2 F2 32 42 04 04 04 04 04>
May 08 08:32:12.45: [20266]: <-- data [23]
May 08 08:32:12.45: [20266]: <-- data [2]
May 08 08:32:13.28: [20266]: --> [7:CONNECT]
May 08 08:32:13.28: [20266]: <-- HDLC<13:FF C8 01 00 77 5F 23 01 FB C1 01 01 1E>
May 08 08:32:13.28: [20266]: <-- data [13]
May 08 08:32:13.28: [20266]: <-- data [2]
May 08 08:32:13.91: [20266]: --> [2:OK]
May 08 08:32:13.91: [20266]: <-- [9:AT+FRH=3\r]
May 08 08:32:20.92: [20266]: --> [0:]
May 08 08:32:20.92: [20266]: MODEM <Empty line>
May 08 08:32:20.92: [20266]: MODEM TIMEOUT: waiting for v.21 carrier
May 08 08:32:20.92: [20266]: <-- data [1]
May 08 08:32:20.97: [20266]: --> [2:OK]
May 08 08:32:20.97: [20266]: RECV FAX: No answer (T.30 T1 timeout)
May 08 08:32:20.97: [20266]: RECV FAX: end
May 08 08:32:20.97: [20266]: SESSION END


On 5/7/07, Lee Howard <faxguy@xxxxxxxxxxxxxxxx> wrote:
> George H wrote:
>
> > May 07 12:34:41.21: [31707]: RECV training at v.29 9600 bit/s
> > May 07 12:34:41.21: [31707]: MODEM set XON/XOFF/DRAIN: input ignored,
> > output generated
> > May 07 12:34:41.21: [31707]: <-- [10:AT+FRM=96\r]
> > May 07 12:34:41.79: [31707]: --> [7:CONNECT]
> > May 07 12:34:46.30: [31707]: MODEM TIMEOUT: receiving TCF
> > May 07 12:34:46.30: [31707]: <-- data [1]
> > May 07 12:34:46.37: [31707]: --> [2:]
> > May 07 12:34:46.37: [31707]: --> [2:OK]
> > May 07 12:34:46.37: [31707]: MODEM set XON/XOFF/DRAIN: input ignored,
> > output disabled
> > May 07 12:34:46.37: [31707]: <-- [9:AT+FRS=7\r]
> > May 07 12:35:04.31: [31707]: --> [10:NO CARRIER]
>
>
> Well, let me explain what that says.
>
> It says that after receiving DCS (indicating an intent to use V.29 9600
> bps) we then started listening for V.29 9600 bps carrier and heard it
> and trained with it at 12:34:41.79.  If we are to trust the modem then
> the sender did not drop the carrier for at least 4.5 seconds (TCF
> training is only supposed to be 1.5 seconds long).  HylaFAX told the
> modem to abort TCF reception and to then await the carrier drop
> (AT+FRS=7).  That carrier drop was finally detected at 12:35:04.31, 22
> seconds later, at which point the modem was then on-hook.
>
> As it's an analogue modem I suspect that this represents an error with
> the modem itself.  I would counsel you the same way as I've been
> counselling USR users for a while now... avoid using +FRS entirely (your
> session has it used twice).  Please make sure that you have this in your
> modem config file:
>
> #
> # When using AT+FRS=n we see USR modems reset themselves in the middle
> of sessions
> # this is not good.  So, we seem to work-around that problem by not
> using the
> # command.  Unfortunately, this isn't an ideal thing.
> #
> Class1SwitchingCmd:     "<delay:7>"
>
> Lee.


--
"Nothing is impossible for the person that doesn't have to do it"
"The probability of anything happening is in inverse ratio to its desirability"
"If I were a roman statue, I'd be made alabastard"
--
George H
george.dma@xxxxxxxxx

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