GCD,
This should have been explained in your training class if you are a certified technician. Also, you need to be more clear as what you have written makes no sense at all, but I think I understand what you are having a problem with.
If you want to transfer to an extension on the phone system as a Digit Translation you need to make an associated Mailbox or Extension ID for it as the Voice Mail doesn't know anything about the extensions on the phone system even though they share an interface.
If you don't need a Mailbox to take messages then make it an Extension ID.
Thanks,
TE