In this stage, Chunghwa Telecom deploys ADSL access network employing ATM point-to-point architecture that has a PVC provisioned through the core to the endpoint for each user. As the network changes, it will be difficult to configure and maintain the network. BB-RAS releases the broadband access limitations and plays an important role in next generation network. There are so many important features in BB-RAS, such as traffic aggregation, bandwidth management, firewalls, dynamic service selection and virtual routers. Aggregation of xDSL traffic into trunk PVCs reduces the number of VC connections across the network and then resolves the shortcoming of the ATM point-to-point architecture. The dynamic service selection enables end users to access network more easy and convenient. With so many broadband access features, the BB-RAS enables providers to cost-effectively provision and deliver services to subscribers. At first, BB-RAS is used to provide xDSL traffic aggregation. But, growing up with requirements, more applications, such as virtual private network for enterprises, will be implemented by BB-RAS.