Voipbuster:is also accessible though other sip and iax complient softphones and ATA's - xTen Lite is my personal favourite for SIP. Settings: SIP Proxy:sip.voipstunt.com Registrar Proxy: sip.voipstunt.com Username: yourvoipstuntusername Password: yourvoippassword Stun Server: stun.voipstunt.com Domain/Realm: voipstunt.com