DESC: The Litespan-2000 is an advanced OC-3 SONET-based next generation digital loop carrier (NGDLC) providing both ATM-based xDSL and TDM-based narrowband/wideband subscriber services from the same plug-in channel unit slots. The Litespan system's flexibility, scalability and wide array of interfaces allow seamless integration of the Litespan into existing and future access networks. The latest Litespan platform releases enhances service density and power savings with the introduction of brand new hardware including the high speed channel bank assembly (HSCBA), the high capacity channel bank assembly (HCCBA), and the quad integrated ADSL line unit. Today the Litespan continues to be the world's most widely deployed NGDLC.