What is BRAS (Broadband remote access server)?

A broadband remote access server (BRAS, B-RAS ) routes traffic to and from broadband remote access devices for example digital subscriber line access multiplexers (DSLAM) on an Internet service provider’s (ISP) network. B-RAS joins these to and from digital subscriber line access multiplexers into a single network that routes traffic. They give a single point for change control. It is a multiservice access node (MSAN) free.