This is an example of our provisioning for a 10 down / 1 up client with voice priority. The highlighted section are the various bitrates and burst numbers. You will need to adjust them for your exact offering as each provider's may be different.
We build 4 different 'groups' of attributes. One for speed, one for location, one for VLAN, and one for voice prioritization. Additionally, we add a reply item for the unique IP of the radio. For each 'group' of reply items, you need to add a Fall-Through = Yes attribute so the radius server will had out more than just one group of reply items. I hope this helps!