I contacted Vonage...and they willing gave me the following information. user name: Your phone #, and the password is posted on your account. Domain name: 216.115.20.41 sip proxy: same as domain stun: Leave this blank. audio codec: pcmu/800 G7292/8000 audio port: 8000 to 8025 Group DNS: a.vomim.com The tech also tried to call my tablet, but in the end it didn't work. When she called me, after answering my tablet it immediately drops the call. If I called any number...same problem, but it drops the call after 4 rings. am using gizmo for know.