[Asterisk-Users] Ugly echo cancel, with Bristuff/Zaphfc

[Matt]

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 at gmail.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at 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?
>
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