The cable network is often considered to be the portion from the headend to the subscriber's house. The network architect must widen his perspective to begin at the source of origination and extend to the customer premise equipment in the subscriber's home. This end-to-end assessment is necessitated by the advancements and migration of technology in production equipment and in consumer electronics. One of CableLabs' major tasks is to research Advanced Network Development (AND), to propose a model, and to test it. The intent of the AND process is to ensure that the fundamental principles of existing network topologies are not adversely impacted with the migration of new technology or functionality.