[Asterisk-Users] Re: Asterisk in production as a fax server, anyone?

[Steven]

Most complaints concerning fax and asterisk are from people trying to fax over IP.

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Steven

May you have the peace and freedom that come from abandoning all hope of having a better past.
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"Adolfo R. Brandes" <arbrandes at instant.com.br> wrote in message news:e0h8rp$gim$1 at sea.gmane.org...
> Lee Howard wrote:
>> However, based on the comments you give I'd suspect that you're having what people seem to be calling "frame slipping".  There 
>> seem to be some motherboards that react poorly with Zap cards (or their respective drivers) and cause that.  Your zttest results 
>> should be revealing here.
>
> We hadn't thought of using zttest.  I'll do some research on how it can be used to detect frame slips and problems of the sort, 
> and will post our results later.  Great pointer, though!
>
>> The concurrent calls really isn't that big of a deal, either, if those are your thoughts.  The bigger issue seems to be the 
>> quality of the audio as it is delivered to the fax application/modem.
>
> Interesting.  The little information I've found on the subject seemed to imply that Asterisk couldn't handle more than a handful 
> of fax calls using software DSP.  This could also be explained away by frame slips too, right?
>
>> In my experience Sangoma offers better (or maybe just more caring) post-sale support than does Digium, however, the "frame 
>> slipping" issue seems to happen with both sets of hardware.
>
> Thanks for clearing that up.  I had begun to get the impression that Sangoma cards were overall better cards than Digium's.  It 
> seems that's not necessarily the case.
>
>> As for Eicon Divas being used for IVR, I've never used them that way.
>
> We haven't, either.  It had just come to our attention, however, that using hardware DSP might be a better bet.  Nevertheless, 
> little research was done with respect to using Eicon Divas as something similar to a Zap device with Asterisk.  It seems chan_capi 
> might do the trick.
>
>> The most success I've seen has been to bridge the call through Asterisk to a T1 fax modem such as a Patton 2977 or an Eicon Diva 
>> Server with HylaFAX running the modems.
>
> Now THAT is a very good idea!  To us, it means that if push comes to shove, there is a certain method for having IVR and reliable 
> faxing available during a single call.  Thank you!  But just to make it clear, woudn't frame slips enter the picture here too?
>
> In any case, thank you for replying, Lee!  Your post was extremely helpful.
>
> Adolfo R. Brandes
>
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