AT&T ADI - Is it VLAN Tagged or does it have the option to be VLAN Tagged?

Hi there,

I am looking through the publicly available docs on the internet, trying to understand if ADI can be delivered as a tagged service to a router. Does anyone have experience with ADI and the deployment options available?

This would be for ADI service inside a carrier hotel where an AT&T Network Node already exists; single mode fiber hand-off.