TERMINAL SYSTEM HAVING BOTH ATM TERMINAL FUNCTION AND ATM-BASED ADSL TERMINAL FUNCTION

摘要

PURPOSE: A terminal system having an ATM terminal function and an ATM-based ADSL terminal function in common is provided to share common portions between an ATM terminal system and an ATM-based ADSL system so as to access both ATM network and ADSL network through one terminal system. CONSTITUTION: A terminal system having a terminal function and an ATM-based ADSL terminal function in common is comprised of an ADSL physical layer part(200), an ATM physical layer part(202), an ATM/ADSL TC(Transmission Convergence) part(204), an ATM SAR(Segment And Reassembly) part(206), a control part(208), and a storage part(210). If a user selects a network to access, a configuration file stored in the storage part(210) is downloaded to the ATM/ADSL TC part(204) through the ATM SAR part(206). According to control signals outputted from the control part(208), a bit stream incoming through the ADSL physical layer part(200) or the ATM physical layer part(202) is made by the ATM cell in accordance with a receiving clock incoming from the ADSL physical layer part(200) or the ATM physical layer part(202). The bit stream is transmitted through a UTOPIA receiving bus in parallel. The data received through the ATM SAR part(206) are assembled into user information. User information to be transmitted is separated in ATM cells. The ATM cells transmitted through a UTOPIA transmitting bus are loaded into an ATM/ADSL frame through the ATM/ADSL TC part(204) in serial in accordance with a transmitting clock outputted from the ADSL physical layer part(200) and the ATM physical layer part(202).