A multi-port communications system is described, which includes hardware based subsystems for performing both physical medium dependent operations and transport convergence operations on a data transmission. A software based subsystem performs other operations as needed. Both types of subsystems are...http://www.google.ca/patents/US20020008256?utm_source=gb-gplus-sharePatent US20020008256 - Scaleable architecture for multiple-port, system-on-chip ADSL communications systems
