I'm using a Draytek Vigor 2900VG for accessing Sipgate, and find the
voice quality to UK PSTN is often poor ("breaking up" is the best I can
describe it).

I am set for G711A, with a packet size of 20ms. Would I do better with a
different packet size?

My broadband connection is by radio from a local supplier (Zycom) rather
than via BT. I don't know how it compares with BT on quality - but I
don't think that latency is a problem (20ms to 30ms for a ping to
[url]www.bbc.co.uk[/url]), nor am I losing many packets (3% typical).

My router offers QoS, but I can't find any help on how to set that up
for Sipgate - would that help? And if so, can anyone suggest how to
configure it - I tracked down a previous post for QoS on 2900VG, - but
it suggests QoS settings that do match the options I am offered!

John Geddes
Derbyshire