This has been addressed by RonR and some other folks. But here is the quick fix.
You'll have to add this to the incoming VoiceService --> SP1 Service --> X_InboundCallRoute
Add the following string: {asterisk:},{(xxx):},{'asterisk':},{('asterisk'):}
So the actual string would look something like: {(x.4029997777):aa},{asterisk:},{(xxx):},{'asterisk':},{('asterisk'):},{ph}
This would also prevent calls from 3 digit numbers that the Obi sometime receives at odd times.
Thanks