I have added a VOIP Provider (And tried it as Voip Trunk) for BT. The Port/Trunk Will connect with the following settings SIP server hostname or IP: btsip.bt.com SIP server port: 5060 Outbound proxy hostname or IP: btsip.bt.com Outbound proxy port (default is 5060): 5060 External Number: 01********* My Geographical number Authentication ID: 05********* My Voip Number Authentication Password ************** Password Password is NOT the password that BT supply you with it has te be extracted via the following method: http://forums.thinkbroadband.com/voip/2896502-bt-sip-config-setup-c460ip-decom-homehub-kit.html I have also tried Step "4" as listed on the above link to do with BT not advertising btsip.bt.com BUT when i try to make a call i get the following error "You cannot make or receive calls on this line....................." I have searched all over the web but to no avail - I have also tried connecting using a Grandstream GPX-2000 phone this also was unsuccessful. I have sopken to BT VOIP support but they will not give out the settings because "it's against company policy" but apparently they are available online if i look! THANKS VERY MUCH aside from this i have the settings......well most of them so something must need to be tweaked. It's also worth mentioning I am NOT using a BT Hub I have 5060 Port open to my 3CX Computer. I did find one post of someone using a BT Hub and 3CX getting connected - either they are doing something different to me or the HUB is what makes the difference.