CTC Store IPDSLAM-A8/A16 Manual De Usuario

 
 

                                                                 

 

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Fig 0-1 & Fig 0-2 display the differences between traditional ATM-based 

DSLAM and ADSL IP DSLAM in PPPoE application sample. 

 

 

 

 

 

 

 

                       

Figure 0-1    PPPoE application in Traditional ATM-based ADSL Network 

 

As Fig 0-1 displays, in traditional ATM-based ADSL network, the user 

application information is encapsulated by ADSL CPE into ATM cells in 
pre-defined VC(Virtual Channel, PVC), and then    upstream the ATM cells to 
DSLAM via ADSL link. (In this example, the user information (PPPoE 
encapsulated) is encapsulated by ATU-R using RFC-1483 Bridge-mode 
encapsulation format.)   

All the ATM cells belong to the specified VC is concentrated by the DSLAM, 

and switched in the ATM network clouds, to the defined destination (ISPs, 
Offices, ..), at there the ATM cells and PPPoE frames is resolved by the 
Broadband Access Server, and the user application information is serviced.