Once installed the it can be configured with the following steps:
Press Settings on the main window, top right
Select the SIP Accounts option
Select the + icon at the top right of the screen
Select Voipfone from the list of suppliers
Enter your account details or extension details.
If you have our PBX service your account number will be followed by an extension, e.g. 30127669*200. If you don't have extensions your account number is all you need in the username box.
The password is the digit number that you use to log into your Voipfone account.
if you have our PBX it's the one specific to your extension. which you'll find on your account here: https://www.voipfone.co.uk/account.php#view-pbx