The only thing I can offer is to set up a call forward no answer to an external number. If you are feeling really adventurous there might be something you could do with using Google Voice (voice.google.com) but I suspect what you are after is a feature called Single Number Reach which is available on the UC500 series.
That is correct, I am after this feature Single Number reach, and for some reason I thoguht I heard during a product presentation, that it was included in the UC320 platform.
