If you are getting back to Phone B's greeting, supervised transfer is actually working. The reason why it is going to Phone B's greeting is because the caller input option has transitioned the caller from Phone A's call handler to Phone B's call handler. Once in Phone B's call handler, the supervised transfer is processed (since the caller input option in Phone A's call handler probably was "attempt transfer" for Phone B). If this previously got the caller back to Phone A's greeting after the supervised transfer from Phone B's call handler pulled the call back to voice mail, that sounded like a defect.
You could try this, but it's going to require the creation of a another, unique call handler per subscriber with the supervised 0-out caller input option:
In the case of Phone A, create another call handler (say call handler A.1) that has a blank greeting and action after greeting that takes a message for Phone A. From Phone A's caller input options, select attempt transfer to call handler A.1. When the supervise transfer for call handler A.1 is pulled back to voice mail, it should go take a message for Phone A. Not entirely pretty, but it should work.
Steve Olivier
Software Engineer
Cisco Systems
