Re: flexfax: retrain negative/resend?

[David Woolley <david@djwhome.demon.co.uk>]

FAQ:  This is extensively covered in the archives.

> 
> a numebr of destinations say they often receive 3 or 4 apparantly
> complete faxes for each send form hylafax...this appears to depend on
> the recipient's fax system, and seemingly the only thing the logs have
> in common is somehting like:
> 
> Feb 01 16:52:46.75: [ 9605]: SEND send EOP (no more pages or documents)
> Feb 01 16:52:46.75: [ 9605]: <-- data [2]
> Feb 01 16:52:52.90: [ 9605]: --> [5:ERROR]

The modem hasn't actually been very specific - Hylafax is actually guessing
RTN.

> Feb 01 16:52:52.90: [ 9605]: SEND recv RTN (retrain negative)
> Feb 01 16:52:52.90: [ 9605]: <-- [7:AT+FDT\r]
> Feb 01 16:55:52.90: [ 9605]: MODEM <Timeout>
> 
> is this a hylafax problem?

There are some Hylafax problems, but they normally result in 100% failure
rates.  Random failures could be the intended cause of this message, namely
a bad quality phone line.

> 
> what does it mean?

RTN (but not necessarily the "ERROR" actually reported) means that the
remote fax machine considered the signal quality so poor that it is 
necessary for the modems to recalibrate themselves for changed line
conditions AND the resulting page was of unuseable quality.

Most modems don't actually examine the real line quality but look for
coding violations in the fax data.

> 
> is there anything i can do?

Make sure you are running a current version and a good quality modem.
Neither of which you identified.

Read the archives and review the available patches.   One of them removes
a coding violation at the end of the tag line and another causes Hylafax to
reduce speed (which may help for some line problems) between tries.