Put in your BBTalk phone number & your plain text password
click 'Next'
On the page that appears, click "Configure hub/router"
A little pop-up should appear with a button labelled "Configure"
Right-click on that button and select "Copy link location"
Open a text editor and paste (cmd-v). A long line of text appears.
Look for the string "SIPPassword1="
Copy the next 15 characters (those between the '=' and '&' characters).
Paste that into the X-Lite SIP account password field.
(curtsey of Malcolm_Herring at http://community.bt.com/t5/BB-Out-About/Softphone-settings-for-Mac-users/m-p/4884)
On Tophology tab;
Tick the "Use local IP address " box (Important)
Try this. If it doesnt work you may have to configure your BT HomeHUb to opent ports 5060 and 8000-8005 (for xlite) as well. Here is how you do it
http://portforward.com/english/routers/port_forwarding/BT/BTHomeHub/X-Lite.htm
Good luck. Ask me if there are any questions.
MAIN THING IS IT WORKS ! BT PEOPLE WILL SAY NO. BUT IT WORKS. I USE IT EVERYDAY !