Validated settings:
Authentication Name: <6 digit number i.e. voxalot id>
Authentication password: <password>
Username: <6 digit number i.e. voxalot id>
Display name: My Name
Domain: eu.voxalot.com
Proxy server address: eu.voxalot.com
Proxy server port: 5060
Registrar server: eu.voxalot.com
Registrar server port: 5060
You may need to enable & configure STUN, depending on your environment.
Even if you have correct settings you may need to set/clear the "Active" checkbox number of times before account will be successfully registered.