Both problems relate to your proposed greeting-to-group solution, that is to set an empty IVR menu with the outcome field set to the call group. When you said outcome I took it to mean the timeout field as there is no outcome field, was I wrong?
So to summarise.
Problem 1: When using the greeting-to-group solution the TAG field set in the TRUNK definition is not passed through to the phones in the call group.
Problem 2: When using the greeting-to-group solution the caller will hear the greeting then the hold music (this is defined in the TRUNK definition). If there is no answer the call group eventually timeouts (as defined in the call group), there is a very slight pause in the hold music for the caller and then it resumes as does the ringing in the call group - this would seem to continue while the caller is on the line and there is no answer. I tested for over 5 minutes.
Please let me know if you still want the logs now that I've attempted to clear things up.
Cheers,
Adam