asterisk users - Jan 2006 - Ugly echo cancel, with Bristuff/Zaphfc

I'm using bristuffed Asterisk with ISDN/ZAPHFC
I have VERY ugly (outgoing) sound through ISDN/HFC if echocancel=yes in
zapata.conf, but without echocancel I have bad (incoming) echo
Through PSTN/FXO sound is ok with or without echocancel.

I tried other echo cancellers (in zconfig.h) two times:

ECHO_CAN_KB1 (this was default)
ECHO_CAN_MARK2
ECHO_CAN_MG2

after any change I compiled (make clean all && make install) all drivers
which are bristuffed, without recompiling Asterisk (should I?), but...

... I always have EXACTLY same (ugly) sound and same (appearing of) echo
cancelling.

Seems to me that echo canceller do not changing no matter what I choose
in zconfig.h. This must be some bristuff echo cancel "patch" to zaptel
source? Before I bristuffed Asterisk, I was playing with zconfig.h and I
remember that difference between echo canceller were very obvious.

Anybody have some knowledge about bristuffed echo cancelling?

I'm using zaptel on a x100p card, so my $0.02 may be apply, but I found
that if I said echocancel=256 (256 taps), I would end up with horribly
distorted outgoing audio (started off okay, but with bad echo, and after
about 20 seconds most of the echo was gone but the audio was almost just
noise).

I went back to 128 and it seemed okay. I haven't tried 64 but you may
have more success with that, or a lower power of two.

Good luck.

James
> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-
> bounces@lists.digium.com] On Behalf Of Pisac
> Sent: Sunday, 15 January 2006 14:57
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: [Asterisk-Users] Ugly echo cancel, with Bristuff/Zaphfc
> 
> I'm using bristuffed Asterisk with ISDN/ZAPHFC
> I have VERY ugly (outgoing) sound through ISDN/HFC if echocancel=yes
in
> zapata.conf, but without echocancel I have bad (incoming) echo
> Through PSTN/FXO sound is ok with or without echocancel.
> 
> I tried other echo cancellers (in zconfig.h) two times:
> 
> ECHO_CAN_KB1 (this was default)
> ECHO_CAN_MARK2
> ECHO_CAN_MG2
> 
> after any change I compiled (make clean all && make install) all
drivers
> which are bristuffed, without recompiling Asterisk (should I?), but...
> 
> ... I always have EXACTLY same (ugly) sound and same (appearing of)
echo
> cancelling.
> 
> Seems to me that echo canceller do not changing no matter what I
choose
> in zconfig.h. This must be some bristuff echo cancel "patch" to
zaptel
> source? Before I bristuffed Asterisk, I was playing with zconfig.h and
I
> remember that difference between echo canceller were very obvious.
> 
> Anybody have some knowledge about bristuffed echo cancelling?
> 
> _______________________________________________
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> 
> Asterisk-Users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users

You need hardware echo cancel card such as sangoma 104d card to do hardware
cannel to fix the bad echo problem. Software solution is not powerful enough
at all.

Best Regards

Matt
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----- Original Message ----- 
From: "Pisac" <pisacc@gmail.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users@lists.digium.com>
Sent: Saturday, January 14, 2006 7:56 PM
Subject: [Asterisk-Users] Ugly echo cancel, with Bristuff/Zaphfc

> I'm using bristuffed Asterisk with ISDN/ZAPHFC
> I have VERY ugly (outgoing) sound through ISDN/HFC if echocancel=yes in
> zapata.conf, but without echocancel I have bad (incoming) echo
> Through PSTN/FXO sound is ok with or without echocancel.
>
> I tried other echo cancellers (in zconfig.h) two times:
>
> ECHO_CAN_KB1 (this was default)
> ECHO_CAN_MARK2
> ECHO_CAN_MG2
>
> after any change I compiled (make clean all && make install) all
drivers
> which are bristuffed, without recompiling Asterisk (should I?), but...
>
> ... I always have EXACTLY same (ugly) sound and same (appearing of) echo
> cancelling.
>
> Seems to me that echo canceller do not changing no matter what I choose
> in zconfig.h. This must be some bristuff echo cancel "patch" to
zaptel
> source? Before I bristuffed Asterisk, I was playing with zconfig.h and I
> remember that difference between echo canceller were very obvious.
>
> Anybody have some knowledge about bristuffed echo cancelling?
>
> _______________________________________________
> --Bandwidth and Colocation provided by Easynews.com --
>
> Asterisk-Users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
>

On Sun, Jan 15, 2006 at 04:56:57AM +0100, Pisac wrote:
> I'm using bristuffed Asterisk with ISDN/ZAPHFC
> I have VERY ugly (outgoing) sound through ISDN/HFC if echocancel=yes in
> zapata.conf, but without echocancel I have bad (incoming) echo
> Through PSTN/FXO sound is ok with or without echocancel.

This will probably not help you but this is my experience. I'm using
zaphfc with flor'z patch. It works great with 3 zaphfc cards (didn't try
more).
Only time i noticed problem is when zaphfc shared interrupt with other stuff.
On time it shared interrupt with ide controller and there was no way to rid of
echo. I moved card to another slot and every thing was perfect.

Same thing is when you have more hfc cards make shure that primary card 
(in case of flor'z patch) doesn't share interrupt.

On Sun, Jan 15, 2006 at 04:56:57AM +0100, Pisac wrote:
> I'm using bristuffed Asterisk with ISDN/ZAPHFC
> I have VERY ugly (outgoing) sound through ISDN/HFC if echocancel=yes in
> zapata.conf, but without echocancel I have bad (incoming) echo
> Through PSTN/FXO sound is ok with or without echocancel.
> 
> I tried other echo cancellers (in zconfig.h) two times:
> 
> ECHO_CAN_KB1 (this was default)
> ECHO_CAN_MARK2
> ECHO_CAN_MG2
> 
> after any change I compiled (make clean all && make install) all
drivers
> which are bristuffed, without recompiling Asterisk (should I?), but...
> 
> ... I always have EXACTLY same (ugly) sound and same (appearing of) echo
> cancelling.
> 
> Seems to me that echo canceller do not changing no matter what I choose
> in zconfig.h. This must be some bristuff echo cancel "patch" to
zaptel
> source? 
The bristuff change to zaptel (the kernel level), other than adding
kernel modules is very limited. Echo cancelation in itself is done in
the kernel space in Zaptel.
> Before I bristuffed Asterisk, I was playing with zconfig.h and I
> remember that difference between echo canceller were very obvious.
> 
> Anybody have some knowledge about bristuffed echo cancelling?
Bristuff does change chan_zap. Something you could try to verify what I
have just written is to try working with a bristuffed Zaptel and
non-bristuffed Asterisk. This should work.

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