User's Manual

Confidential&Proprietary42/115 SC‐DAS
No. Unit Description Remark

1 DOU
DonorOpticUnit
ConvertTXRFsignalsintoopticalsignals;
ConvertRXopticalsignalsintoRFsignals;
ProvideuptofouropticalportsperDOU
Max2ea.

2 EWDM
ExpansionWavelengthDivisionMultiplexer
ConvertTXopticalsignalsintoRFsignals;
ConvertRXRFsignalsintoopticalsignals;
CompensatesforopticalcablelosswithODU

3 ECPU
ExpansionCentralProcessorUnit
Controlandmonitoringsystemstatus
ControlandmonitoringwithRS232
RelaysstatevaluesofROUtoBIU

4 EPSU
ExpansionPowerSupplyUnit
Inputpower:DC‐48V,Outputpower:9V,6V

5 ERFM
ExpansionRadioFrequencyModule
RegenerateTXsignalsandtransmitFSKmodemsignals;
RegenerateRXsignalsandreceiveFSKmodemsignals

6 Shelf 19”rack,2RU 

4.3.4 SubAssemblydescription
1)DonorOpticUnit(DOU)
TheDOUisthesameasthemoduleusedfortheODU.

Figure4.23–DOUataglance