Dave Gill wrote:
> A couple of times now the person at the other end of one of my VoIP to
> PSTN calls has complained that the line seemed "echoey" and prone to
> breaking up. All seemed fine at my end. My broadband supplier is
> Telewest/Blueyonder, if that makes any difference...
>
> I'm using a Sipura 2100 (that's the "router" one with 2 ethernet ports)
> with QoS set to TBF (as recommended by Sipura), otherwise the set-up is
> as for a Sipura 2000. Anything I can alter or tweak to improve things?
>

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.

jd