Re: [hylafax-users] HylaFAX v4.2.1 under Debian 3.1; Zyxel U90E - Report says successfully completed, but Fax failed

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Bozem, Markus wrote:

> Aug 08 16:06:29.84: [17707]: <-- [9:AT+FTH=3\r]
> Aug 08 16:06:30.88: [17707]: --> [7:CONNECT]
> Aug 08 16:06:30.89: [17707]: <-- data [4]
> Aug 08 16:06:30.89: [17707]: <-- data [2]
> Aug 08 16:06:31.13: [17707]: --> [2:OK]
> Aug 08 16:06:31.14: [17707]: SEND send EOR (end of retransmission)
> Aug 08 16:06:31.14: [17707]: SEND send EOP (no more pages or documents)
> Aug 08 16:06:31.14: [17707]: <-- [9:AT+FRH=3\r]
> Aug 08 16:06:31.77: [17707]: --> [7:CONNECT]
> Aug 08 16:06:32.73: [17707]: --> [2:OK]
> Aug 08 16:06:32.73: [17707]: SEND recv ERR (confirm end of retransmission)
>  

What brand and model of fax machine is this at the receiving end?

EOR means "end of retransmissions".  From T.30 it states, "This command 
indicates that the transmitter decides to terminate the retransmission 
of error frames in the previous partial page and to transmit the next 
block upon receipt of ERR response."

So the ERR signal is a confirmation of the receipt of EOR and indicates 
the receiver's acknowledgement that the process will move on to the next 
block (if there is one, and in this case there isn't one).  If the 
receiver did not want the process to move on to the next block or 
confirm the receipt of the current one then they should disconnect 
and/or send DCN.

So, truth said, the receiver here confirmed the page reception.  
Furthermore, the image data compression was MH - meaning that even if 
there had been corrupt portions of data, the receiver still could have 
printed out 95% of the image just fine.  Furthermore, it would appear 
that the receiver did not report any corrupt frames that we 
transmitted.  Unless Class1PersistentECM is disabled (it's enabled by 
default), HylaFAX will only transmit EOR when the receiver signals an 
"empty" PPR - meaning the PPR signal indicates that all frames that were 
transmitted were received (in which case the receiver should probably 
have signalled MCF instead).

Since the receiver confirmed the page, why do you say that the fax failed?

Lee.


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