[Asterisk-Users] Echo cancellation

[Peter Zeltins]

> > I'm interested. I'm running chan_capi 0.3.0 with Fritz PCI ISDN card.
Using
> > DIAX as softphone and dialing out to PSTN generally results in good
sound
> > quality at softphone end (no echo), but PSTN end experiences quite a bit
of
> > echo. I have enabled echosquelch in capi.conf, but it does not seem to
help
>
> Then my idea is not your solution, nor is echosquelch, I guess.  Yes, it
> would be possible to kludge chan_capi to alleviate your problem; no, I
> do not think it would be the right solution.  If the far end hears echo,
> it's coming from the near end, that is from your softphone.  You could
> try to use something else to confirm that (a hardphone?).  I suggest
> that you play with the mixer settings on your own machine, because it's
> your sound card that's recording the far end's voice!

I do not have a hardphone to play around with, but the echo is there both
with built-in audio card (SigmaTel) and Bluetooth headset. There are no
mixer settings than I can adjust as well. I'll try disabling AGC and/or
lowering mike sensitivity.

Peter