NoticeOnly one Backup master site can exist in a One-look network.Master UnitSlave Unit(BackupMaster Unit)Slave UnitSlave UnitITSPMaster UnitSlave Unit(BackupMaster Unit)Slave UnitSlave UnitFaultITSPOne-look Network One-look NetworkNoticeAll Slave units will restart. Depending on the makeup of the network, it may take 15 minutes or more forthe system to become fully operational in Backup Master mode.LED IndicationOperatingStatusMaster Unit Slave Unit(Backup Master Unit) Slave UnitSTATUSLEDMASTERLEDSTATUSLEDMASTERLEDSTATUSLEDMASTERLEDNormal Green ON Green ON Green ON Amber ON Green ON Amber ONAfter a Faultat the MasterSite- -Green ON GreenFlashingGreen ON Amber ONFor more information about LED indications, refer to "LED Indications" in "4.3.1 Mother Board".Similarly, when you press the System Alarm button set for the flexible button on the PT, a message thatindicates the PBX status has changed will be displayed on the LCD on the PT.For details, refer to "12.1.4 Local Alarm Information" in the Feature Manual.Backup Master Mode Setup ProcedureSpecifying a Backup master siteTo use Backup master mode, you have to specify a site in the One-look network as a Backup master site.Only a Slave site that is in the INS or FAULT state can be specified as the Backup master site.The Backup master site is set using Web Maintenance Console.Procedure1. On the Home screen, click .2. Select the desired site in Backup Master.Document Version 2016-03 Installation Manual 3378.4.2 One-look Networking Survivability
