Voicemail notification works fine, but I want to be able to program the handset so that when I tell it to check voicemail, it accesses Ooma (my number plus 1-1)
Not sure about your Vtech, but what you can do is save your phone number in your address book and maybe configure a speed dial option to work just as your cell phone does.
My Panasonic has a seperate screen to add just that (check another VM number).