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

[Lee Howard]

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.