Contacts on VVX handsets using Google Voice

Hi,

We have deployed Google Voice at a couple of our sites and are using some Polycom handsets. They work fine. However, I was wondering if there is a way of getting them to show the same contacts as a user gets on the mobile app or the web interface - so their normal Google Contacts.

I'm not sure this is even a thing. Anyone any ideas? Google seems a bit vague on the subject.

Thanks,

Roger