When making a call from OC to an extension which is already in a call (i.e. busy), an error message is displayed in OC instead of telling the line was busy.
I have similar problem seen in LCS/MOC2005 but was fixed by adding cause=busy in the csta failed event.
This does not help in OCS/MOC2007.
Can you please let me know if the cause has been changed in OC2207 so that i can send the same from my application to OCS/MOC2007.