| 摘要 |
<p>The invention relates to an enhanced ADSL Data Network (ADN) (10) with vertical services capabilities. In general, vertical services capabilities are data services offered directly from a central office (15) to an end user (25), without compromising the integrity of the user's guaranteed bit rate to the internet through the AND (10). One such vertical service is content downloadable at a high data rate from a local content server located in or proximate a central office that serves the end user (25). The content of the local content server is updated and upgraded periodically and systematically from a central content server that distributes content to a plurality of central offices. The content is distributed between the central content server and the respective local content servers using bandwidth of an ATM network (19) that is unused by subscriber traffic.</p> |
