Table 2-23 PRI/BRI LED IndicationsPriorityNo. Operation Status LED Indication on theBase Board Remarks1 System Initializing On2 The assignment of the board is refused. 3s On / 3s Off • When you exceed thesystem capacity.• When the main soft-ware version is notmatched.3 Trouble found during self-diagnostics. 1s On / 1s Off4 NormalOperationA Channel is busy (use another from CH1 ~CHx).500ms On / 100ms Off5 All channels are idle. 100ms On / 100ms Off6 BoardBusyA Channel is busy (use another from CH1 ~CHx).100ms On / 2s Off7 All channels are idle. Off8 Downloading firmware. 80ms On / 80ms Off /80ms On / 80ms Off /80ms On / 400ms OffFor 1PRIDB OnlyT1 Alarm ModeRefer to following figure for LED pattern information. LED indications for the T1 are listed inTable 2-24 T1 LED Indications on page 2-58.LOS green120 msgreengreengreenAISOOFRAI1 cycle 3.8 sec (120 ms x 32 = 3840 ms)Figure 2-75 Indication Pattern of Layer 1 on T1 BoardTable 2-24 T1 LED IndicationsAlarm Details of the Alarm The LED Indication PatternLOS LOS (Loss of Signal (Red Alarm))No Signal (Analog Interface)Following an alarm blink twice (green), a green LED light up.AIS AIS (Alarm Indication Signal (Blue Alarm)) Following an alarm blink twice (green), a green LED flasheson and off slowly twiceOOF OOF (Out of Frame (Red Alarm)) Following an alarm blink twice (green), a green LED flash onand off 3 times simultaneously.RAI RAI (Remote Alarm Indication (YellowAlarm))Following an alarm blink twice (green), a green LED goesoff.No alarm System does LED controlThe order of priority is set up to alarm in the order LOS → AIS → OOF → RAI.SL2100 ISSUE 1.02-58 Installation
