This configuration guide describes basic usage and configuration of the Command Line Interface (CLI), a comprehensive management interface for use with ADTRAN Switch Engine (ASE) products. While CLI describes the method used to communicate, such as by console or Telnet, it also refers to the way information is passed to the unit. As a text-based user interface, the CLI prompts you to input commands line by line when you interface with the ASE unit (hence the name command line interface). CLI is the only management interface accessible on the serial console. Even without network connectivity, ASE devices can be managed using a serial connection.