I currently use a BT Business ADSL line with a BT Falcon 2 IP Phone, the quality / kicked off of the VOIP calls is affected by Up-stream traffic like sceen sharing or File uploads because I only have 330 kbps available.
QoS seems to be the answer so I now have a Draytek Vigor 2850n but I cannot work out how to configure the QoS settings, has anyone done this and advise me? Any help would be greatly appreciated.

Never used Voip but here some links if will give you light
http://www.draytek.co.uk/support/kb_voip_qosupstream.html
http://www.draytek.co.uk/support/kb/kb_qos.html
http://www.draytek.com/index.php?option=com_k2&view=item&id=1829:faq-article-1829&Itemid=293&lang=en
http://www.draytek.com/index.php?option=com_k2&view=item&id=1419:faq-article-1419&Itemid=293&lang=en
http://www.voip-info.org/wiki/view/Draytek,+SIP,+and+QoS

Sometime here is slow .. if not any reply soon google "draytek qos settings with voip"

Hi Babis3g, thanks for the links, it seems I have go tit working.
What I did was to assign IP Address to MAC for the Falcon2 Phone (I'm making the assumption that this is Static IP's in Draytek terms)
Then assign 25% outbound bandwidth to that Single IP Address and enabled "Outbound TCP ACK Prioritize"
Tested it while maiking a call and replicating my email and sending a 5mb file, seemed to work and I wasn't kicked off the call.
Will carry on playing with it to see if I have missed something but if any one has any other suggestions or tips then please let me know.
Have a good evening.