上海贝尔公司开发的1000 ADSL产品将高速率的视频、音频和数据信号在现有的电话双绞线上实现传送,通过采用DMT和ATM技术,允许用户在保留原有模拟业务的情况下,通过双绞线运行宽带业务。 ADSL技术将上行信道与下行信道分开,上行信道速率从16 kbit/s到640 kbit/s,下行信道速率从1.5 Mbit/s到8 Mbit/s,特别适用于客户服务器结构中客户机从服务器上大量读取信息而相对较少向服务器传送数据的情况。拥有固 1000 ADSL products, developed by Shanghai Bell, deliver high-speed video, audio and data signals over existing twisted-pair telephone lines. By using DMT and ATM technologies, users are allowed to pass through legacy analog services Twisted pair operation broadband business. ADSL technology separates upstream and downstream channels from 16 kbit / s to 640 kbit / s and downstream channel rates from 1.5 Mbit / s to 8 Mbit / s. It is especially suitable for client-server configurations from client to server Large amount of information is read while less data is being transferred to the server. Have a solid