SUPPORTING MULTIPLE UPSTREAM AND DOWNSTREAM CHANNELS IN A CABLE MODEM TERMINATION SYSTEM LINE CARD

摘要

A circuit for a cable modem termination system is provided. The circuit includes a backplane interface and a packet processing engine coupled to the backplane interface. The circuit further includes a plurality of media access control (MAC) circuits, each media access control circuit coupled to the packet processing engine, each MAC circuit supporting one of N contiguous downstream channels with a single upconverter and each MAC circuit also supporting a plurality of upstream channels.