ATM Interfaces

• UNI (User Network Interface)

  • Defines the connection between user equipment and ATM equipment (e.g. a workstation and the ATM switch)

• NNI (Network-to-Network Interface)

  • The interface between ATM devices

• ICI (Intercarrier Interface)

  • The interface between different ATM carriers

• DXI (Data Exchange Interface)

  • Interface from ATM into legacy equipment (such as routers into ATM using HDLC)

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