Subscriber Asymmetric Digital Subscriber Line Modem of Asymmetric Digital Subscriber Line System

摘要

In the ADSL modem of subscriber side of an asymmetric digital subscriber line (ADSL) system, the ATM handler and the SAR processing unit are composed of one device element, and the ATM-based data is processed as Ethernet packet data, thereby making it possible for another network of a PC or a workstation. The present invention relates to a subscriber side ADSL modem of an ADSL system capable of interfacing with an ATM system. Through the handler, it converts into ATM cell data, and then, through the SAR processing unit, processes Ethernet packet data of AAL5 type CPCS-PDU and transmits it to the network, and conversely, Ethernet packet data of AAL5 type CPCS-PDU transmitted from the network is transmitted. The ATM data is processed by the ATM handler. Through the DMT transceiver, the line driver and the splitter to transmit to the CO along with the POTS call signal, the ATM handler and SAR processing unit in the subscriber-side ADSL modem in the ADSL system as a single interworking block By processing the ADSL service data and the control signal based on the Ethernet packet data, it is easy to interface with the network, and the circuit configuration is simpler than in the related art, resulting in cost reduction.