Upgraded to 2gb service

I just upgraded to 2gb internet service (though I'm pretty sure provisioning hasn't happened yet).

I current have an Arris TG4482A modem (data+voice), and I'm thinking of dropping voice.

Does the TG4482A support speeds up to 2gb?

Not talking just the WAN port to my router - does it support 2gb speeds from Xfinity?

-- Thanks, Verne