This is likely a NAT or SIP ALG issue, such that the OBi does not receive an ACK for its 200 OK response.
Make sure that your router has the latest firmware, and try turning off any SIP ALG setting, if such exists.
Then, try each of the following, one at a time (back out one change before making the next).
1. Set (in ITSP Profile A or B as appropriate) STUNEnable, and set STUNServer to a valid STUN server, e.g.
stun.counterpath.net .
2. Change (in SP1 or SP2 Service) X_UserAgentPort from 5060 to 5070 or from 5061 to 5071 .
3. Same as step 2, but also in your router, forward the UDP port corresponding to X_UserAgentPort to the OBi.
4. Set (in ITSP Profile A or B -> SIP) OutboundProxy to the same value as is in ProxyServer .
If no luck, please post: Modem make/model? Separate router, if any? Any special settings in router? Is this the same OBi in FL that you posted about on Jan. 20? If so, was it working then? If so, what may have changed to break it?
Also, I'm curious: Who is the provider? What is the cost and location of the DID? (Possibly, an American provider that is known to work with the OBi can provide a quality JP DID at a similar or lower price.)