Some devices will still register to the OBi202. Check to see if it's registered.
In OBi Expert go to Status/System Status
The status of the trunk you defined as the X_Proxy should look something like this:
Registration Not Required Local_client xx.xx.xx.xx:pppp
xx.xx.xx.xx:pppp is the IP address and port of your phone. If you don't see the address, the phone isn't registered to the OBi202.
Here is the setup
http://www.obitalk.com/forum/index.php?topic=12492.0Do following to circumvent the bug:
Voice Services -> SP4 Service -> X_Proxy: Unchecked
Voice Services -> SP1 Service -> X_InboundCallRoute:
ph,sp4(OBi200@xx.xx.xx.xx:pppp)
OBi200 = UserId of IP phone
xx.xx.xx.xx:pppp is the IP address and port of the phone
Turn off registration in the phone