Response Point - Transfer call to outside number

A customer asked if she could transfer an incoming call to an outside number with Response Point.  Hmmm, said I, good question - and one that I do not know the answer to.  She has a telephone answering service for doctors and would like to be able to transfer an incoming call to the doctor when deemed appropriate. After referring to the RP help file I remembered that the RP transfer function only allows for transferring a call to an RP extension.  HOWEVER, I created a user on the RP system and set their "call forwarding" to forward to an outside number instead of to voicemail.  THIS WORKED.  It does use two phone lines and requires that the 'transfer to' party be created ahead of time.