PT Overview 1-151.1 ConfigurationLED IndicationThe Light Emitting Diode (LED) buttons indicate the line conditions with lightingpatterns.Flashing light patternsLED Indication on the INTERCOM ButtonThe table below shows the lighting patterns for intercom line conditions.INTERCOM ButtonOffGreen OnFlashing Green SlowlyFlashing Green ModeratelyFlashing Green RapidlyIntercom Line ConditionIdleIntercom call / Conference establishedIntercom call holdIntercom call exclusive holdIncoming intercom/doorphone call— Item with an * is only available on a Single-CO button.CO ButtonOffGreen OnFlashing Green SlowlyFlashing Green ModeratelyFlashing Red RapidlyRed OnFlashing Red SlowlyFlashing Red ModeratelyOutside (CO) Line ConditionIdleYou are using the line.You have a held call or Hold RecallYou have one of the following:(1) exclusive hold, (2) outside-to-outside (CO-to-CO) line call, or (3) Conference, Unattended.Incoming callOther-useOther-hold*Local Carrier-Based Voice Mail Service*BLF on DSS ButtonThe Busy Lamp Field (BLF) indicator button is red when the corresponding extension isbusy. This is available for Flexible CO buttons assigned as DSS buttons on proprietarytelephones.LED Indication on the CO ButtonThe table below shows the lighting patterns for outside (CO) line conditions.1 sFlashing slowly(60 flash/min)Flashing moderately(120 flash/min)Flashing rapidly(240 flash/min)