1.20.3 LED IndicationDescriptionThe LED (Light Emitting Diode) of the Message/Ringer Lamp and following buttons (Line Status Buttons andCorresponding Extension Status Button) show line conditions with a variety of light patterns.Line Status Buttons: S-CO, G-CO, L-CO, INTERCOM, ICD Group, PDNCorresponding Extension Status Button: DSS, SDN1. Light Pattern of the Message/Ringer Lamp[DPT]• Incoming call from a trunk: Red flashing• Incoming call from another extension: Green flashing• Message(s) present (no incoming call): Red on• No message(s) present (no incoming call): Off[APT]• Incoming call: Red flashing• Message(s) present (no incoming call): Red on• No message(s) present (no incoming call): Off2. Light Pattern of the Line Status ButtonsLight PatternLine Status ButtonTrunk Status Intercom LineStatusIncoming CallDistributionGroup LineStatusS-CO G-CO L-CO INTERCOM ICD GroupOff IdleGreen on This extension is using the line.Slow greenflashingThis extension is holding the line.Moderategreen flashingThis extension is holding the line using Exclusive Hold or using the line for an Un-attended Conference.Rapid greenflashingIncoming call/Privacy Re-leaseIncoming callRed on Incoming callfor another ex-tension/Anoth-er extension isusing the line/Another exten-sion has theline on Exclu-sive Hold.Other exten-sions are usingall trunks in thetrunk group.— This extensionis logged out ofthe incomingcall distributiongroup.Feature Guide 2391.20.3 LED Indication