ATM ADSL SUBSCRIBER CONNECTION SYSTEM AND A METHOD THEREOF, PARTICULARLY CONCERNED WITH CONNECTING A TERMINAL ACCESSED TO THE INTERNET THROUGH A FAILED NAS WITH THE INTERNET THROUGH A NEW NAS, IN ORDER TO RECOVER CONNECTIVITY OF AN IP LEVEL

摘要

Purpose: a kind of ATM ADSL user connecting systems and its method are arranged to that PPP (point-to-point protocol) meeting of a terminal is arranged by using a new NAS (network access server), when the existing NAS that PPP meetings are arranged has a defect, a dynamic IP addressing is distributed to terminal, so that the interior of shortest time in analgesic restores IP level connection between terminal and NAS. Construction: from a terminal (21), a DSLAM (22) receives signal transmission, and multiplication receives signal. One NAS A(23) multiplexed signals is received, integration receives signal in the type that can be transmitted for a backbone (24). As NAS A(23) failure when, a NAS B (25) setting use terminal (21) new PPP meetings, distribute a dynamic IP addressing. One user connects DB (26) and is assigned IP address, from NAS A(23) and NAS B (25), and the store information on terminal (21). Backbone (24) is passed from NAS A(23) and NAS B (25) collecting signals, rapidly transmits collected signal.