[Asterisk-Users] Very bad quality with AVM Fritz!card PCI and chan_capi

[Benjamin Sebbah]

> On Thu, 29 Jun 2006, Benjamin Sebbah wrote:
> > ----- Original Message -----
> > From: Armin Schindler <armin at melware.de>
> > Date: Thursday, June 29, 2006 11:48 am
> > Subject: Re: [Asterisk-Users] Very bad quality with AVM 
> Fritz!card PCI
> > and chan_capi
> > 
> > > On Thu, 29 Jun 2006, Benjamin Sebbah wrote:
> > > > Hi everyone,
> > > > 
> > > > I have Asterisk SVN-trunk-r7498 running for a few months and 
> I'm 
> > > quite> happy with it. However, I am experiencing a quality 
> issue 
> > > with my AVM
> > > > Fritz!card PCI which is used with chan_capi. When somebody 
> calls 
> > > me on
> > > > this line he hears a lot of noise and I hear "scratches" and 
> > > "plops". It
> > > > is very annoying. Below is is my /etc/asterisk/capi.conf 
> > > > I've tried to play with echotail and echosquelch but the 
> quality is
> > > > always terrible. 
> > > > 
> > > > Any suggestion is welcomed.
> > > 
> > > echotail is for hardare-echo-cancel only (e.g. Eicon Diva 
> Server) 
> > > and does 
> > > not change anything for AVM card.
> > > Did you try to disable echosquelch?
> > > 
> > > Why did you set rx/txgain to 0.5 ? Most people use 0.8, but I 
> use 
> > > no gain by setting it to 1.0, which works here good.
> > > 
> > > Armin
> > 
> > Thanks for the answer, I did try to disable equosquelch but it 
> doesn't> change anything (by the way it is disabled right now). To 
> see if the
> > noise was a gain issue I tried to modify rx/txgain to see if it 
> changed> anything but it didn't so I let those two values at 0.5
> > 
> > Any other idea?
> 
> Maybe the card/driver has a problem. IRQ issue?
> 
> Armin

That is possible, how could I check that?
I can see that IRQ 17 is shared between eth0 and my fritz!card but I
don't know if it changes anything:

~# cat /proc/interrupts
           CPU0
  0: 1458224031    IO-APIC-edge  timer
  1:        953    IO-APIC-edge  i8042
  7:          0    IO-APIC-edge  parport0
  8:          1    IO-APIC-edge  rtc
  9:          1   IO-APIC-level  acpi
 14:     689691    IO-APIC-edge  ide0
 15:         24    IO-APIC-edge  ide1
 16: 1457845530   IO-APIC-level  uhci_hcd:usb1, wctdm
 17:  721402147   IO-APIC-level  fcpci, eth0
 18: 1457844720   IO-APIC-level  uhci_hcd:usb3, wctdm
 19:          0   IO-APIC-level  uhci_hcd:usb2
 23:          0   IO-APIC-level  ehci_hcd:usb4
NMI:          0
LOC: 1458419318
ERR:          0
MIS:          0


Benjamin

> 
> > 
> > > 
> > > > Thanks,
> > > > 
> > > > Ben
> > > > 
> > > > </etc/asterisk/capi.conf>
> > > > [general]
> > > > rxgain=0.5
> > > > txgain=0.5
> > > > language=fr      ;set default language
> > > > ;ulaw=yes        ;set this, if you live in u-law world 
> instead of 
> > > a-law
> > > > [ISDN1]
> > > > 
> > > > isdnmode=DID     ;'MSN' (point-to-multipoint) or 'DID' 
> (direct 
> > > inward dial)
> > > >                  ;when using NT-mode, 'DID' should be set in 
> any 
> > > case> incomingmsn=*    ;allow incoming calls to this list of 
> > > MSNs/DIDs, * = any
> > > > controller=1     ;capi controller number to use
> > > > group=9          ;dialout group
> > > > softdtmf=on      ;enable/disable software dtmf detection, 
> > > recommended> for AVM cards
> > > > relaxdtmf=on     ;in addition to softdtmf, you can use 
> relaxed dtmf
> > > > detection
> > > > accountcode=     ;Asterisk accountcode to use in CDRs
> > > > context=capi-in  ;context for incoming calls
> > > > ;echosquelch=2   ;_VERY_PRIMITIVE_ echo suppression
> > > > echocancel=yes  ;EICON DIVA SERVER (CAPI) echo cancelation
> > > >                  ;(possible values: 'no', 'yes', 'force', 
> 'g164', 
> > > 'g165')> echocancelold=no ;use facility selector 6 instead of 
> > > correct 8
> > > > (necessary for older eicon drivers)
> > > > echotail=128     ;echo cancel tail setting
> > > > devices=2        ;number of concurrent calls on this controller
> > > >                  ;(2 makes sense for single BRI, 30 for PRI)
> > > > 
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