• Asynchronous Serial Configurations
  Using a modem on an async serial interface or aux port
  
  
• Frame Relay Configurations
  Point-to-point and multipoint frame relay configurations
  
  
• ISDN Configurations
  For router models with an integrated BRI interface (2503, 2504, 2516, 2520, 2521, 2522, 2523, 2524 w/BRI module, 2525 w/BRI module)
  
  
• Leased Line Configurations
  Dedicated point-to-point sync serial configurations
  
  

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