Ooh! Could you please tell me how you did it? I've tried entering the settings at http://www.sightspeed.com/index.php?...mid=177#faq286 but it didn't work for me - it keeps saying "Network Error". These are the settings I've plugged into the N800... MAIN A/C SETUP PAGE: - Username: myemail@blah.com - Password: mypassword - Use for PSTN calls: checked (Under Advanced...) CONNECTION TAB: - Transport: UDP - Outgoing proxy: sip.sightspeed.com - Port: 5060 - Discover public address: checked - Keep-alive mechanism: Auto - Keep-alive frequency: 0 AUTHENTICATION TAB: - Authentication user name: myemail@blah.com (or is this meant to just be "myemail"?) - Password: mypassword STUN Auto-detect STUN: I have tried checking this as well as entering the following details... STUN server: stun.sightspeed.com STUN port: 3478 When I dial the person, I've tried dialing person@blah.com as well as person@sip.sightspeed.com Am I missing something?