John Daragon <john@argv.co.uk> wrote:

> I'm not sure about the echo (which can have a multitude of causes), but
> QoS is only going to give priority amongst the packets leaving your
> router. If you're not using an uncontended (1:1) ADSL connection, you're
> going to hear distortions (drops, etc) in the sound path. G711 is likely
> to be degraded more than some compressed codecs because of the higher
> bandwidth requirement.

I've taken a couple of suggestions on board, to use G729 codec and to
lower the handset volume. Things do seem to be better, although we
haven't had enough calls to know for sure. I notice the handset volume
has crept back up a bit, so I'm hoping the solution was in the codec...

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