I'm also new setting up the software and I can't get the handoff to work correctly, however I am trying to use a FAX/printer/copier instead of fax software.
I just added distinctive ringing to incoming faxes and will try to set up the fax to answer the distinctive rings right away and ignore the rest which would be picked up by the IVM Answering Attendant. I haven't teste it yet, but I will let you know. Does anyone else have any ideas?