[TechnoHippie]

babudpoa - yes it should work since they make the sip settings avail. here they are:
SIP port : 5060
Proxy server : sip.intervoip.com
Registrar : sip.intervoip.com
Outbound proxy server : leave empty
Account name : your InterVoip username
Password : your InterVoip password
Display name/number : your InterVoip username or voipnumber
Stunserver (option) : stun.intervoip.com