Re: [hylafax-users] constant problem form one sender

[Tildar <tildar@xxxxxxxxx>]

Thanks Lee,

Interesting. All my modems are MT5642ZBA-V92, but they ARE connected
via a Comtrol RocketPort serial card.

That being the case, could the problem really rest in my serial card,
and not the modems at all?

I will start digging, but if anyone has any other input, please chime in.

On Wed, Jun 9, 2010 at 10:13 PM, Lee Howard <faxguy@xxxxxxxxxxxxxxxx> wrote:
> Tildar wrote:
>>
>> Jun 01 16:16:44.16: [20959]: TRAINING succeeded
>> Jun 01 16:16:44.16: [20959]: <-- [9:AT+FTH=3\r]
>> Jun 01 16:16:45.14: [20959]: --> [7:CONNECT]
>> Jun 01 16:16:45.14: [20959]: <-- HDLC<3:FF C8 21>
>> Jun 01 16:16:45.14: [20959]: <-- data [3]
>> Jun 01 16:16:45.14: [20959]: <-- data [2]
>> Jun 01 16:16:45.52: [20959]: --> [2:OK]
>> Jun 01 16:16:45.52: [20959]: <-- [11:AT+FRM=146\r]
>> Jun 01 16:16:45.65: [20959]: --> [8:+FCERROR]
>> Jun 01 16:16:45.65: [20959]: <-- [11:AT+FRM=146\r]
>> Jun 01 16:16:45.87: [20959]: --> [8:+FCERROR]
>> Jun 01 16:16:45.87: [20959]: <-- [9:AT+FRH=3\r]
>> Jun 01 16:16:46.63: [20959]: --> [7:CONNECT]
>> Jun 01 16:16:54.51: [20959]: --> [2:10 03]
>> Jun 01 16:16:54.51: [20959]: --> [10:NO CARRIER]
>> Jun 01 16:16:54.51: [20959]: MODEM No carrier
>> Jun 01 16:16:54.51: [20959]: <-- [9:AT+FRH=3\r]
>> Jun 01 16:16:54.63: [20959]: --> [7:CONNECT]
>> Jun 01 16:16:55.79: [20959]: --> HDLC<5:FF C8 F2 AC A0>
>> Jun 01 16:16:55.79: [20959]: --> [2:OK]
>> Jun 01 16:16:55.79: [20959]: RECV recv MPS (more pages, same document)
>
> The modulation being used by the sender is apparently not compatible with
> your modems.  Couple that with a modem bug with V.21 HDLC detection,  and
> you get this.
>
> The +FCERROR responses means that although the modem trained on the sender's
> TCF signal, the modem isn't able to train on the Phase C signal, and
> furthermore is a mess because the +FCERROR indication seems to lead one to
> believe that V.21 HDLC is there - but it's not - yet the modem happily
> thinks so and fouls up the recovery procedure with its complications.
>
> I suspect that you're looking at a compatibility problem between the sender
> and your modem.  Given the other misbehaviors that your RocketModem is
> making, chances are good that the culprit here is the RocketModem, and you'd
> probably not have this problem with a different modem.  That said, it could
> be the sender's fault, too.
>
> Thanks,
>
> Lee.
>
>


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