[asterisk-users] Cianet channel bank with noise and echo

[jefferson alexandre]

Ok Steve. I will follow these instructions until i get some results.

The next time, I will consider buy a hardware with echo canceller ;)

On Tue, Nov 24, 2009 at 12:05 PM, Steve Howes <steve-lists at geekinter.net>wrote:

>
> On 24 Nov 2009, at 13:48, jefferson alexandre wrote:
> > Steve, the hardware don't have echo cancellation.
>
> Thats probably it.... You're relying on Asterisks software echo
> canceling.... I have seen mixed results. Have you tried adjusting
> gains? I'd do the following
>
> 1. Turn off echo canceler (makes it more obvious whilst you're trying
> to remove it)
> 2. Turn down both gains
> 3. listening' inside your network (i.e. listening to audio coming to
> your network from the PSTN), adjust the gain upwards until it sounds
> suitable
> 4. 'listening' outside of your network (i.e. listening to audio coming
> from your network to PSTN) do the same.
> 5. Test for echo. Adjust the gains down for the sound you hear back
> (i.e. if you hear person inside your network echoing, adjust the gain
> in '4').
> 6. Try and get it as close to echo free as you can using this method
> 7. Enable any echo canceling you can find to 'tidy up' the leftover
> echo, try various ones if you need to. voip-info.org/wiki may help
> 8. Buy hardware echo cancelers next time ;)
>
> S
>
>
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