The high-speed access network

The high-speed access network will replace part or all of the local-line distribution and will become an increasingly important element of the network. The network operator will wish to provide the full range of broadband and narrowband services to end users connected to the access network. To ensure that these can be delivered by the access network to end users in a consistent and standard manner and to allow interoperability of access networks and local exchanges, it will be necessary for the suppliers of access network equipment to support ETSI V5.1, V5.2 and V_b5 interfaces. This tutorial paper describes the fundamental principles and key functional capabilities of these interfaces