• Asynchronous Serial Configurations
  Requires Async Software Feature Set (1005 only)
  
  
• Frame Relay Configurations
  (1005 only)
  
  
• ISDN Configurations
  For router models with an integrated BRI interface (1003, 1004)
  
  
• Leased Line Configurations
  Dedicated point-to-point sync serial (1005 only)
  
  

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