Broadband remote access server

It is at the BRAS that an ISP can inject policy management and IP quality of service (QoS).

The specific tasks include: A DSLAM collects data traffic from multiple subscribers into a centralized point so that it can be transported to a switch or router over a Frame Relay, ATM, or Ethernet connection.

In the case of ATM or Frame Relay based access, individual subscribers are identified by Virtual Circuit IDs.

Subscribers connected over Ethernet-based remote access devices are usually identified by VLAN IDs or MPLS tags.

The BRAS is also the interface to authentication, authorization and accounting systems (see RADIUS).