asterisk users - Jun 2005 - cheap HFC card on Bristuff vs cheap HFC card on i4l vs Fritz ISDN BRI card on CAPI

Hello

I have asterisk running in Red Hat 9 with a cheap HFC card on i4l. I have
choppy sound problems sometimes, and echo problems often. I am using a 2
port Grandstream ATA, Grandstream BT and a Grandstream GPX-2000

I read that changing to BriStuff will fix the echo problems, but have also
read other users say that the only way they solved the echo/choppy sound
problems was using a Fritz ISDN card with the CAPI drivers...

I have tried using bristuff on RH9 but couldn't get my zaptel to compile...
 
Then there is the issue of timing, ztdummy or zaprtc....and QoS setup on the
Linux box...

Can anyone who has a 100% working Asterisk implementation using any of the
techniques described above tell me more...

I will happily upgrade to the Fritz card if it will solve all the
problems...

Thanks
Vicente


-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Stefan
Gofferje
Sent: 07 April 2005 09:27 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] "Choppy" sounds after transferring to
ISDN
clientor after a time

Hi,

Michiel van Baak schrieb:
>I had the exact same thing when using a cheap HFC-S card
>connected to my outside ISDN line. Replacing the card with
>an AVM Fritz!PCI fixed this issue for me.
>I tried a lot with the HFC-S card, different archs, SMP,
>uniprocessor, nolapic, noapic, dual channel ram setup, 1
>dimm only, removed all cards but the HFC-S, 4 different
>versions of bristuffed. Nothing solved it.
>
What do you mean? The choppy sound or the log message? Trouble is, my 
HFC-S is internal ISDN. I can't use a Fritz!PCI for that because it 
isn't capable of NT mode...

Regards,
Stefan

-- 
 (o_   Stefan Gofferje          | Linux Systems Specialist
 //\   Reg'd Linux User #247167 | Network Security Specialist
 V_/_  Linux is like a Wigwam - No gates, no windows, Apache inside

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Howdy,

Am Dienstag, den 28.06.2005, 09:01 +0200 schrieb
vdasilva:
> Hello
> 
> I have asterisk running in Red Hat 9 with a cheap HFC card on i4l. I have
> choppy sound problems sometimes, and echo problems often. I am using a 2
> port Grandstream ATA, Grandstream BT and a Grandstream GPX-2000
> 
> I read that changing to BriStuff will fix the echo problems, but have also
> read other users say that the only way they solved the echo/choppy sound
> problems was using a Fritz ISDN card with the CAPI drivers...
Yes, BRIstuff and the hfc-pci will provide echo cancelation. With the
Fritz card however you will NOT get echo cacnelation.
> 
> I have tried using bristuff on RH9 but couldn't get my zaptel to
compile...
Do you have _configured_ kernel sources installed? If you run a 2.6
kernel do you have the necessary scripts to build kernel modules (these
are built during the kernel compilation process)?
>  
> Then there is the issue of timing, ztdummy or zaprtc....and QoS setup on
the
> Linux box...
> 
> Can anyone who has a 100% working Asterisk implementation using any of the
> techniques described above tell me more...
> 
> I will happily upgrade to the Fritz card if it will solve all the
> problems...
> 
> Thanks
> Vicente
best regards

Klaus