61200780L1-1C © 2004 ADTRAN, Inc. 29ATLAS 800 Series System Manual ATLAS 890 Front PanelEngineering GuidelinesOption Module Displays by row the operational condition of each module installed in theoption slots. All LEDs will be off if no option module is installed. (SeeTable 5 on page 29.)Status Indicates the operational condition of modules installed in the optionslots.Online Indicates whether the module is available for use or is currently in use. Ifthe module is manually taken offline, this LED is turned off.Test Indicates that one or more ports within a module are in test.Table 5. ATLAS 890 LED DescriptionFor These Leds... This Color Light... Indicates That...Fans Red (solid) Fan speed is too low or fan is disconnected.Amber (solid) Fan speed is too high.Green (solid) All fans are functioning properly.Alarm Red (solid) A fan, external input, or power supply error has occurred.LED will remain red until the ACO button is pressed.ACO Amber ACO button is being pressed.Stand-by controllerStatus Green (slow blink) Stand-by controller is present.Online Green (solid) Stand-by controller operational for redundancy.Red (fast blink) Controller cannot automatically become the activecontroller while the current active controller is installed.Test N/A N/ALink Green (solid) Ethernet link detected.Table 4. ATLAS 890 Front Panel LEDs’ Purpose (Continued)LED Purpose
