Chapter 6. Utility Menu6-4 TSU 120 User Manual 61202129L1-1Pressing any key after entering a passcode causes the unit toreturn to the previous active menu. In this case it returns to2)CONFIG , 2) UNIT , 1) CTL PORT RATE , to permit changing the datarate.Change/Set a PasscodeThe passcode can be changed or set at any time or eliminatedaltogether through the Utility Menu item 3) SET PASSCODE. Thisprocedure requires the current passcode (if one is established)for operation.The passcode can only be entered by using numbers. Afterentering the desired passcode, press Enter.Set a null passcode at the 3)SET PASSCODE menu by pressingEnter without any numbers. This sets a null passcode andgrants unlimited access.Passcode Automatic Time-outFor added security protection the unit is equipped with anautomatic time-out for operation with the password. After tenminutes of inactivity, the unit reverts to limited access opera-tion. To make changes in the configuration, the passcode can bereentered.If the passcode number is lost, contact ADTRAN Customer Ser-vice for assistance.No Passcode DesiredAt the N EW PASSCODE prompt (in the Set Passcode menu), pressEnter without any numerical entry. The system nullifies theneed to enter a password for subsequent use and proceeds tothe U NIT ID prompt.Unit IDThis menu is used to access the current Unit ID setting. View-ing is available in limited-access mode. Editing or changing theUnit ID requires the use of a password, as in editing mode. Unitidentification numbers must be between 2 and 999.
