Re: [hylafax-users] Send fax ERRORS: COMREC invalid response received to PPS - No response to PPS repeated 3 times

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Luigi Carrieri wrote:

> Thank you Lee for your help.
> Note that actually hylafax is installed in a production
> environment and it is used for daily fax communication to/from
> our customers. For outbound faxes we use hylafax
> as a mail-to-fax gateway service. Documents to fax out are
> *ALWAYS* PDF files attached to mail.
>
> So I *MUST* be careful that whatever test does not degrade the service.
>
> Here is some more information:
>
> 1. In <hylafax-dir>/var/spool/etc/config.ttySx per-modem configuration file
> I 
> put the following parameters
>   Class1ECMSupport:	NO
>   ModemSoftRTFCC:   	NO
>
> 2. In <hylafax-dir>/var/spool/etc/config per-server configuration file I put
> the following parameters:
> 	JobReqBusy:		180
> 	JobReqNoAnswer:	180
> 	JobReqNoCarrier:	180
> 	JobRetryBusy:	20
> 	JobRetryNoAnswer:	20
> 	JobRetryNoCarrier:10
> 	RingTimeout:	15000
>
> 3. I sent the same document to both the faulty fax equipments (as in my last
> mail):
> - the first one (see success-7586.log file in attachment) received the fax
> successfully;
> - the second one (see fail-7608.log) never received the fax because of "busy
> signal detected" error. But the receiving fax equipment was NOT busy! 
> Hylafax tried to dial many times and it was possible to hear the sound of
> carrier for less than a second but then the initial handshake was suddenly
> interrupted. 
> The I tried to send a fax to this machine from another desktop fax equipment
> and
> all went fine. 
>  
> What do you think about this strange behavior? 
>  

The BUSY response from the modem when there is not a busy signal is a 
modem problem.  Either contact the manufacturer for a fix or replace the 
modem with a different one (preferrably with a different chipset).

As for the COMREC invalid response to PPS error that is no longer there 
now that you've disabled ECM - well, unfortunately you didn't carefully 
follow the tests that I specifically outlined to you... so your 
reconfiguration (disabling of ECM) essentially sidestepped the problem 
entirely, and it doesn't really help us come to a proper solution for it.

Furthermore, your disabling of ECM for production use is probably not 
wise, in general.

Thanks,

Lee.

> -----Original Message-----
> From: hylafax-users-bounce@xxxxxxxxxxx
> [mailto:hylafax-users-bounce@xxxxxxxxxxx] On Behalf Of Lee Howard
> Sent: mercoledì 11 aprile 2007 2.02
> To: Luigi Carrieri
> Cc: hylafax-users@xxxxxxxxxxx
> Subject: Re: [hylafax-users] Send fax ERRORS: COMREC invalid response
> received to PPS - No response to PPS repeated 3 times
>
> Luigi Carrieri wrote:
>
>  
>
> > Apr 06 10:32:50.80: [ 4757]: SEND send PPS (partial page signal)
> > Apr 06 10:32:50.80: [ 4757]: SEND send MPS (more pages, same document)
> > Apr 06 10:32:51.37: [ 4757]: SEND recv DCN (disconnect)
> >
> >
> >    
>
>  
>
> > Apr 06 10:32:11.56: [ 4488]: No response to PPS repeated 3 times.
> >
> >
> >    
>
>  
>
> > Errors always occur when sending faxes to these Ricoh fax equipments.
> > What can I do to correct these errors? Is there anything wrong in modems
> > configuration?
> >
> >    
>
> As for the DCN after PPS-MPS (the first log).  Does that happen *every* 
> time you send *any* fax to this destination?  We've seen at least two 
> reports of this kind of thing going on, but we have not been able to 
> nail anything down because in the first case that I investigated the 
> problem suddenly disappeared on its own, and in the second case the 
> reporter never has followed up with test results.
>
> If it is not completely reproducible 100% of the time then please 
> determine under what conditions it is at least reliably reproducible, 
> and report back.  If you can get it 100% reproducible, then follow these 
> steps:
>
> First, call the receiver up and have them reboot their fax machine.  
> Then retest.  If it works then report back.  If not, go to the next step.
>
> Second, send them a test fax like this:  echo " " | sendfax -n -F "" -t 
> 1 -T 1 -d <fax_number>   If it works then report back.  If not then go 
> to the next step.
>
> Third, send them a test fax like this:    echo " " | sendfax -1 -n -F "" 
> -t 1 -T 1 -d <fax_number>
>
> Fourth, in your modem config file put "ModemSoftRTFCC: no" and then send 
> them a test fax like in the third step.
>
> Fifth, send them a test fax like this:  echo " " | sendfax -n -F "" -E 
> -t 1 -T 1 -d <fax_number>  Report back.
>
> Hopefully that's enough testing for me to get an idea as far as what's 
> going on.
>
> As for the "no response to PPS" error.  Please call the receiver and 
> find out if they received any of the page at all.  And if they did, then 
> please see if any of the page was missing.  Please report back on that.  
> Also, following the steps above would be quite helpful for this case, too.
>
> Thanks,
>
> Lee.
>
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