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-li...@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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