[asterisk-users] Oddity with FFA

[Mike Diehl]

Hi all,

For the most part, we are finding that Fax for Asterisk works pretty
well.  However, we have seen some wierdness that we'd like to try to
fix.

Once in a while, we will get a partial result report for a given fax
but when we look at the actual .tiff image, it looks to be complete.
This is causing our users to not get a positive acknowledgement when
they send the fax.

Is there anything we can do to mitigate this?

Mike.

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Re: [asterisk-users] Oddity with FFA

[Steve Underwood]

On 03/11/2014 12:36 AM, Mike Diehl wrote:

Hi all,

For the most part, we are finding that Fax for Asterisk works pretty
well.  However, we have seen some wierdness that we'd like to try to
fix.

Once in a while, we will get a partial result report for a given fax
but when we look at the actual .tiff image, it looks to be complete.
This is causing our users to not get a positive acknowledgement when
they send the fax.

Is there anything we can do to mitigate this?

Mike.

How do you know the FAX is complete? If a page was received, the sending 
machine said more pages were to follow, and then it dropped the call, is 
that a complete FAX?


Steve


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Re: [asterisk-users] Oddity with FFA

[jg]

One of my customers had this problem. The cause turned out to be the other side (one particular 
remote station).


In addition to res_fax, I also installed the Hylafax/iaxmodem combo. Hylafax has the advantage 
of giving nice logs about the signaling. This way it was easy to see what was going on, but I 
have forgotten the details meanwhile.


jg

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Re: [asterisk-users] Oddity with FFA

[Administrator TOOTAI]

Hi

Le 10/03/2014 17:36, Mike Diehl a écrit :

Hi all,

For the most part, we are finding that Fax for Asterisk works pretty
well.  However, we have seen some wierdness that we'd like to try to
fix.

Once in a while, we will get a partial result report for a given fax
but when we look at the actual .tiff image, it looks to be complete.
This is causing our users to not get a positive acknowledgement when
they send the fax.

Is there anything we can do to mitigate this?


We also faced from time to time a reception problem and improve it like 
this: after faxreceive, if faxopt(status) is different to SUCCESS we 
check if faxpages is greater than zero, if yes, if faxopt(error) = 
NO_ERROR. In this case we consider that fax is well received. Asterisk 1.8


--
Daniel

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Re: [asterisk-users] Oddity with FFA

[Mike Diehl]

Steve,

I BELIEVE the fax is complete because the fax image is a form that appears
to only be a single page.

But, since FFA isn't providing acknowledgement, the sending fax machine is
resending the document multiple times!

Mike.


On Mon, Mar 10, 2014 at 12:49 PM, Steve Underwood wrote:

> On 03/11/2014 12:36 AM, Mike Diehl wrote:
>
>> Hi all,
>>
>> For the most part, we are finding that Fax for Asterisk works pretty
>> well.  However, we have seen some wierdness that we'd like to try to
>> fix.
>>
>> Once in a while, we will get a partial result report for a given fax
>> but when we look at the actual .tiff image, it looks to be complete.
>> This is causing our users to not get a positive acknowledgement when
>> they send the fax.
>>
>> Is there anything we can do to mitigate this?
>>
>> Mike.
>>
>>  How do you know the FAX is complete? If a page was received, the sending
> machine said more pages were to follow, and then it dropped the call, is
> that a complete FAX?
>
> Steve
>
>
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Re: [asterisk-users] Oddity with FFA

[Steve Underwood]

Hi Mike,

If the sending machine keeps trying it might be the call has been hung 
up by asterisk before its own acknowledgement message has finished being 
sent. There have been bugs like this in the past, and people can be 
pretty casual about making changes which hang up aggressively. A FAX 
system should really wait for the final DCN message before 
disconnecting, to ensure both sides have seen what they need. Spandsp 
does that, but I am not sure about FFA.


Regards,
Steve

On 03/11/2014 03:03 AM, Mike Diehl wrote:

Steve,

I BELIEVE the fax is complete because the fax image is a form that 
appears to only be a single page.


But, since FFA isn't providing acknowledgement, the sending fax 
machine is resending the document multiple times!


Mike.


On Mon, Mar 10, 2014 at 12:49 PM, Steve Underwood > wrote:


On 03/11/2014 12:36 AM, Mike Diehl wrote:

Hi all,

For the most part, we are finding that Fax for Asterisk works
pretty
well.  However, we have seen some wierdness that we'd like to
try to
fix.

Once in a while, we will get a partial result report for a
given fax
but when we look at the actual .tiff image, it looks to be
complete.
This is causing our users to not get a positive
acknowledgement when
they send the fax.

Is there anything we can do to mitigate this?

Mike.

How do you know the FAX is complete? If a page was received, the
sending machine said more pages were to follow, and then it
dropped the call, is that a complete FAX?

Steve


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Re: [asterisk-users] Oddity with FFA

[Mike Diehl]

Steve,

I appreciate you elaborating on my problem.  I don't suppose this is as
easy as putting a wait(3) in my dial plan before hangup.?  (Didn't
think so.)

Aside from checking (and hoping) for a newer version of FFA that fixes this
issue, I guess there's not much I can do, then.

Thanks again.

Mike.


On Tue, Mar 11, 2014 at 12:27 AM, Steve Underwood wrote:

> Hi Mike,
>
> If the sending machine keeps trying it might be the call has been hung up
> by asterisk before its own acknowledgement message has finished being sent.
> There have been bugs like this in the past, and people can be pretty casual
> about making changes which hang up aggressively. A FAX system should really
> wait for the final DCN message before disconnecting, to ensure both sides
> have seen what they need. Spandsp does that, but I am not sure about FFA.
>
> Regards,
> Steve
>
> On 03/11/2014 03:03 AM, Mike Diehl wrote:
>
>> Steve,
>>
>> I BELIEVE the fax is complete because the fax image is a form that
>> appears to only be a single page.
>>
>> But, since FFA isn't providing acknowledgement, the sending fax machine
>> is resending the document multiple times!
>>
>> Mike.
>>
>>
>> On Mon, Mar 10, 2014 at 12:49 PM, Steve Underwood > ste...@coppice.org>> wrote:
>>
>> On 03/11/2014 12:36 AM, Mike Diehl wrote:
>>
>> Hi all,
>>
>> For the most part, we are finding that Fax for Asterisk works
>> pretty
>> well.  However, we have seen some wierdness that we'd like to
>> try to
>> fix.
>>
>> Once in a while, we will get a partial result report for a
>> given fax
>> but when we look at the actual .tiff image, it looks to be
>> complete.
>> This is causing our users to not get a positive
>> acknowledgement when
>> they send the fax.
>>
>> Is there anything we can do to mitigate this?
>>
>> Mike.
>>
>> How do you know the FAX is complete? If a page was received, the
>> sending machine said more pages were to follow, and then it
>> dropped the call, is that a complete FAX?
>>
>> Steve
>>
>>
>> -- 
>> _
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
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>> http://www.asterisk.org/hello
>>
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>> To UNSUBSCRIBE or update options visit:
>> http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>>
>>
>>
>>
>
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