[SFLphone] wizard info questions

[Tom Poe]

Hello:  I want to set up SIP account to make calls through my account 
with vitelity.net.  I am not sure what the following items need:
Alias  ???  What normally goes here?
Hostname ???  I use asterisk pbx with a public IP assigned to it.  Do I 
put the asterisk IP address here?
Username ???  SFLphone is an extension on asterisk.  Do I put the 
extension name/number here?
Password  ???  Is it the password for the extension?
Thanks, Tom