Re: [hylafax-users] High Error rates

[Stephen Carville <stephen@xxxxxxxxxxxxxx>]

On Thu July 29 2004 11:53 am, Lee Howard wrote:
> On 2004.07.29 11:01 Stephen Carville wrote:
> > Damn!  I sent the wrong transaction file.  Here is the correct one:
> >
> > This transmission created a two page fax; the first page is fine but
> > the
> > second is just a bunch of black band in the top one and one-half inch
> > of the
> > page.
> >
> > Jul 29 07:00:29.20: [25453]: RECV recv MPS (more pages, same document)
> > Jul 29 07:00:29.20: [25453]: <-- [9:AT+FRS=7\r]
> > Jul 29 07:00:29.32: [25453]: --> [2:OK]
> > Jul 29 07:00:29.32: [25453]: <-- [9:AT+FTH=3\r]
> > Jul 29 07:00:29.45: [25453]: --> [7:CONNECT]
> > Jul 29 07:00:29.45: [25453]: <-- data [3]
> > Jul 29 07:00:29.45: [25453]: <-- data [2]
> > Jul 29 07:00:30.66: [25453]: --> [2:OK]
> > Jul 29 07:00:30.66: [25453]: RECV send RTN (retrain negative)
> > Jul 29 07:00:30.66: [25453]: <-- [9:AT+FRH=3\r]
> > Jul 29 07:00:31.86: [25453]: --> [7:CONNECT]
> > Jul 29 07:00:31.99: [25453]: --> [2:OK]
> > Jul 29 07:00:31.99: [25453]: RECV recv DCN
>
> Did the sender call back and retransmit that page and the following
> ones?

Not as far as I can tell.  Should this be an automated response?  If it 
requires the sender to actually read the fax report and retransmit the page 
it may be hopeless with some of our customers.

> Many senders, upon receiving RTN (means that we want them to retransmit
> the page), will disconnect (DCN) and then call back rather than just
> returning to phase B and retraining.
>
> If you really (and I mean *really*) want to know a lot about weird
> things that fax machines do with the RTN signal, then search the
> archives (including -devel) for discussions about RTN between Dmitry
> Bely and Harald Pollack.  Ultimately I've concluded that fax machines
> will treat RTN in any way they feel like it, and we have to just
> tolerate their disregard for the specification.
Clients really disreagard the specifications?  Who'da thunk it...

> Now, if the sender didn't call back, then do you know why?  If the
> sender did call back but didn't resend the corrupted page, then there
> is a problem that needs to be addressed.
>
> Lee.

-- 
Stephen Carville
Unix and Network Adminstrator
DPSI
6033 W.Century Blvd.
Los Angeles, CA 90045
310-342-3602

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