Hi:
Please see your duplicate post here:
http://www.obitalk.com/forum/index.php?topic=9983.msg75715#msg75715I sympathize with your frustration. Sometimes, electronic gadgets just go bad. It sounds like you have a failing OBi unit (hardware problem, not a firmware or configuration issue), or an intermittently failing internet connection.
Your choices are to attempt to test your internet connection for reliability, or get your internet service provider to do it, and/or buy a new OBi, or give up and get telephone service from a regular telephone or cable company.