I've never managed to get voip.co.uk working properly and my contract
is up for renewal in February (IIRC) and I would like to get it working
reliably before February to renew.

I'm currently experiencing dropped and poor call quality, which I think
is due to improper config of QoS on my DSL router. My set-up is
represented thus:

ADSL --> router --> voip MTA (supplied by voip.co.uk) --> DECT phone
|--> wireless router --> wireless laptops
|--> PC

I understand that voip.co.uk recommend that all machines should connect
from the MTA, but as there is only one network port, I'd rather use the
4 on my router. Also, I'm sure this can be done as my router allows for
QoS.

As stated, my router allows for QoS configuration, but I've yet to
manage to configure it happily with my MTA. The MTA is set to receive a
fixed IP from the router (192.168.1.5) with the router on 192.168.1.1.

I've set up a router LAN QoS rules for the traffic between 192.168.1.1
and 192.168.1.5, for high priority, medium priority (with 80%, 20%) but
nothing seems to connect nicely. The MTA also has QoS enabled, but with
no settings. You can see the MTA QoS config screen at:
http://www.monkeez.org/publicpics/voip/voip3.png

You can see the current config that I have on my router at:
http://www.monkeez.org/publicpics/voip/voip1.png

and then the config screen where I am entering information at:
http://www.monkeez.org/publicpics/voip/voip2.png

Basically, any advice you can offer on this last screen to get an
optimal setting for my MTA would be gratefully received. Am I correct
in focusing on port 5060? Are there any other ports that I should allow
for?

TIA
Adam