User's Manual

Confidential&Proprietary107/115 SC‐DAS
After turning on the switch of the power supply in the OEU, check information on each
module'sLEDofthesystem.The tablebelowshowsnormal/abnormalcasesdependingon
thestatusofeachmodule'sLED.
Unit LED Indicates
EWDM
LD

Green:LaserDiodenormalstatus

Red:LaserDiodeabnormalstatus
PD

Green:PhotoDiodenormalstatus

Red:PhotoDiodeabnormalstatus,inputopticpowerlowalarm
DOU1,2
LD

Green:LaserDiodenormalstatus

Red:LaserDiodeabnormalstatus
PD1

Green:PhotoDiode(PD)ofopticport1isnormal 

Red:PDofopticport1isabnormalorinputopticpowerlow
PD2

Green:PhotoDiode(PD)ofopticport2isnormal 

Red:PDofopticport2isabnormalorinputopticpowerlow
PD3

Green:PhotoDiode(PD)ofopticport3isnormal 

Red:PDofopticport3isabnormalorinputopticpowerlow
PD4

Green:PhotoDiode(PD)ofopticport4isnormal 

Red:PDofopticport4isabnormalorinputopticpowerlow
System
ON

Green:Poweron 
TXD1

Greenflicker:ECPUsendNMSTxdatatoBIU
RXD1

Greenflicker:ECPUreceiveNMSRxdatafromBIU
TXD2

Greenflicker:ECPUsendNMSTxdatatoROU
RXD2

Greenflicker:ECPUreceiveNMSRxdatafromROU
ALM

Green:OEUsystemnormal(noalarm)