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.