Re: [hylafax-users] DCN when sending 60 page fax to Canon fax machine

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Jack Liu wrote:

> Thanks for your response.  We've sent 100 page faxes to them before
> with our brother fax machine without a problem.  This appears to be
> related to either hylafax, the modem, or both.  Generally speaking,
> the Canon may simply not communicate well with my hylafax/modem
> combination.
>  

"Not communicating well" will not result in the receiver sending a DCN 
signal.

The DCN signal by a receiver is a deliberate act to terminate fax 
communication.

So if you can get 30 pages through just fine, then you can count on 
there not being any "not communicating well" problems.

If the DCN is not being triggered by page-count or other factors on the 
receive-side, then it could indicate that something is awry with your 
page 40 or 41 (or whatever page it is that it fails on).  Receivers will 
sometimes send DCN when they detect corrupt T.4 or T.6 data.  Since 
you're usine ECM you can trust that if this is the case then the corrupt 
data originated with the document preparer/converter (typically 
Ghostscript).  Try a completely different 50-page document.  If it gets 
through fine then it could very well be something wrong with how the 
preparer/converter prepared that problematic page.  If that's the case, 
then maybe you could try varying the session parameters of the fax, 
starting with the data format (compression).

Canons are rather fussy fax machines... but usually they're fussy for a 
valid reason.

Lee.


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