[Asterisk-Users] Alternatives to SpanDSP??

[Steve Underwood]

Hi Julian,

Sounds like a frame slip problem if the result depends on the source. 
Most people, including me, have trouble with the TDM cards. They worked 
without problem when I was first developing the FAX software in spandsp, 
so I assume the TDM driver has gathered bugs since that time.

Regards,
Steve


Julian J. M. wrote:

>Hi Steve,
>
>I sent a mail to this list a week ago regarding exactly this issue.
>Spandsp doesn't work for me (getting <200rows tiffs), but sending and
>receiving faxes through a FXS-FXO bridge (a TDM11B) works without
>problems.
>
>My motherboard is based an Aopen AK33 (VIA686a chipset, KT133, 700Mhz
>Athlon). I've disabled USB, 2nd IDE, VGA interrupt (runing without X),
>sound.. I've also tweaked PCI settings in the BIOS, testing each time,
>but I don't know what can be wrong. Here is some more info:
>
>cat /proc/interrupts
>           CPU0
>  0:   23411526          XT-PIC  timer
>  2:          0          XT-PIC  cascade
>  4:         80          XT-PIC  serial
>  8:          1          XT-PIC  rtc
> 10:   23322936          XT-PIC  wctdm
> 12:          1          XT-PIC  acpi
> 14:      91663          XT-PIC  ide0
> 15:      51573          XT-PIC  eth0
>NMI:          0
>ERR:          0
>
>$ ./zttest
>Opened pseudo zap interface, measuring accuracy...
>99.975586% 99.987793% 99.975586% 99.987793% 99.987793% 99.987793% 99.987793%
>99.987793% 99.987793% 99.975586% 99.987793% 99.987793% 99.987793%
>99.987793% 99.987793%
>99.987793% 99.975586% 99.987793% 99.975586% 99.987793% 99.987793%
>99.987793% 99.987793%
>99.975586% 99.987793%
>
>Thanks
>Julian J. M.
>
>On 4/26/05, Steve Underwood <steveu at coppice.org> wrote:
>  
>
>>Why would you expect a bunch of fax modems to work any better than
>>spandsp? If spandsp doesn't work reliably your system is very likely broken.
>>
>>I have had hundreds of complaints about spandsp reliability. I have
>>analysed at least 50 or 60 audio logs. I have found maybe 5 or 6 which
>>has real spandsp problems. The rest had frame slips. Of the 5 or 6 with
>>real problems, most have been fixed in the latest version. I have one
>>weird audio log from a new HP combination printer and fax machine that i
>>haven't sorted out yet. These HP machines really are total crap. I have
>>workarounds in spandsp for several blatently wrong things they do. I
>>don't yet know who is at fault with this latest problem.
>>
>>Regards,
>>Steve
>>    
>>