ATM Architectural Model

• The Physical Layer
  • Table 1 - Some Common ATM Data Rates
  
  
• The ATM Layer
  • Figure 3 - Virtual Path and Virtual Circuit Concept

  • Figure 4 - ATM Network Interfaces

  • Figure 5 - ATM Layer Processing of an ATM Cell

  • Figure 6 - Connection Setup through ATM Signaling

  
  
• The ATM Adaptation Layer or AAL
  • Figure 7 - Service Classes in B-ISDN

  • Application-Level Services
    • Constant Bit Rate (CBR)

    • Variable Bit Rate (VBR)
      • nrt-VBR
      • rt-VBR

    • Available Bit Rate (ABR)

    • Unspecified Bit Rate (UBR)

    
    
  • Figure 8 - ATM Service Classes and Corresponding AAL Protocols

  • Figure 9 - Final ATM Architecture Model

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