[Asterisk-Users] Digium cards, so disappointing !

[Steve Underwood]

Remco Barende wrote:

>>> Hmm not so sure of that. I have an HP all-in-one thingy. It is not 
>>> possible to set the TX/RX speed hard in the config at a certain 
>>> speed. Through the developers menu in the beast it is possible to do 
>>> this temporary.
>>>
>>> Faxing at max 9600 bps works, anything higher fails miserably after 
>>> the second or third page.....
>>
>>
>> This doesn't make sense. The known problems are all timing related, 
>> and 9600 (I presume you mean V.29 at 9600) is no more or less 
>> sensitive to timing slips than V.17. Actually, on a poor line V.17 at 
>> 9600bps should perform considerably better than V.29 at 9600bps. Can 
>> you tell me your exact setup? There must be something else wrong.
>>
>
> I tried lots of different settings but none really seemed to help.
>
> The line is ISDN BRI with an HFC-S card. Software is bristuff with 
> florz patch. Echo can, silence suppr. etc all disabled.
>
> The HP is connected to a Sipura SPA 2000 with the correct settings for 
> fax and the region i'm in. Still consistently faxes fail after the 
> first or second page. The HP is a LaserJet 3330 mfp.
>
> Setting it back 9600 did help a bit.
>
> I solved the problem now by connecting an old Digital -> Analog 
> converter to the BRI line, bypassing Asterisk.

The Sipura is probably the problem. FoIP doesn't generally work for a 
number of reasons. Packet loss and jitter are just two of them. See 
http://www.soft-switch.org/foip.html and 
http://www.soft-switch.org/foip-with-real-atas.html for some others.

Regards,
Steve