[hylafax-users] [asterisk-users] asterisk, iaxmodem, hylafax quality problem

[Artifex Maximus]

Hello,

Sorry for returning such an old topic but it looks like I found a
solution. I am using FC5 on an IBM x206 with TDM2400P and TE405P.

Using this general guide:
http://www-128.ibm.com/developerworks/library/l-hw2.html
and this hint
http://pastebin.ca/32678

I had put pastebin.ca stuff into /etc/rc.d/rc.local and my problems
are gone. The zttest gives lower values but more stable:

Opened pseudo zap interface, measuring accuracy...
99.975586% 99.975586% 99.975586% 99.975586% 99.975586% 99.975586% 99.975586%
99.975586% 99.975586% 99.975586% 99.975586% 99.975586% 99.975586%
99.975586% 99.975586%
99.975586% 99.975586% 99.975586%
--- Results after 18 passes ---
Best: 99.975586 -- Worst: 99.975586 -- Average: 99.975586

bye,
Zsolt

On 9/24/06, Lee Howard <faxguy at howardsilvan.com> wrote:
> Artifex Maximus wrote:
>
> > zttest is often on 99.975586% with final result:
> > --- Results after 67 passes ---
> > Best: 99.987793 -- Worst: 99.951172 -- Average: 99.973764
>
>
> This is unacceptable for faxing, and it is evidence of the underlying
> problem also causing your faxes to come through with poor quality.
>
> >  0: 2087872259    IO-APIC-edge  timer
> >  7:          0    IO-APIC-edge  parport0
> >  8:          1    IO-APIC-edge  rtc
> >  9:          1   IO-APIC-level  acpi
> > 14:   18440124    IO-APIC-edge  ide0
> > 15:    4456445    IO-APIC-edge  libata
> > 169:    4878102   IO-APIC-level  eth0
> > 177: 2086847525   IO-APIC-level  wctdm24xxp
> > 185: 2086810653   IO-APIC-level  wct4xxp
>
>
> Notice the priorities here... and that your Zaptel cards come *last*,
> after eth0, after IDE.  Each of those Zap cards are going to generate an
> interrupt once every millisecond when in use.  You can hopefully imagine
> how IDE or eth0 activity would interfere, since they have a higher
> priority than the Zap cards.
>
> Lee.