ADSL SUBSCRIBER TERMINAL FOR ATM

摘要

PURPOSE: An ADSL(asymmetric digital subscriber line) subscriber terminal is provided to service multimedia application programs of high speed by directly accessing in the ADSL subscriber terminal of an ATM(asynchronous transfer mode) exchange. CONSTITUTION: An ATM(asynchronous transfer mode) subscriber interface module(100) performs an accessing function of ADSL line by composing of an ATM layer processor(110) to communicate with a switching network, to distribute by mixing and dividing a clock with receiving a synchronous signal, to process an OAM function(operation, administration and maintenance) and to manage a subscriber and an ADSL(asymmetric digital subscriber line) subscriber processor(120) of 16boards to accept four ADSL subscribers for each board. The ATM layer processor(110) sends a starting signal of transmitting cell to inform the start of 16bit data and the transmitting cell into the ADSL subscriber processor(120) through a transmitting/receiving cell bus. When the starting signal of receiving cell to inform the start of receiving 16bit data, the receiving cell and the requesting signal of cell receiving to request the receiving of cell from the ADSL subscriber processor(120), the ATM layer processor sends a permitting signal of cell receiving to permit the receiving of cell to the ADSL subscriber processor(120) requesting the receiving of cell. An ADSL subscriber terminal for an ATM(120) is accessed with an ATM switching board through an ADSK line(200) and offers an ATM data service of high speed by processing a transmitted and received ATM cell.