Description, continued
Installation
Compliance Prediction
TheꢀAFBR-700SDZꢀtransceiverꢀpackageꢀisꢀcompliantꢀwithꢀ
theꢀSFFꢀ8432ꢀImprovedꢀPluggableꢀFormfactorꢀhousingꢀ
specificationꢀforꢀtheꢀSFP+.ꢀꢀItꢀcanꢀbeꢀinstalledꢀinꢀanyꢀINF-
8074ꢀ orꢀ SFF-8431/2ꢀ compliantꢀ Smallꢀ Formꢀ Pluggableꢀ
(SFP)ꢀportꢀregardlessꢀofꢀhostꢀequipmentꢀoperatingꢀstatusꢀ
TheꢀAFBR-700SDZꢀisꢀhot-pluggable,ꢀallowingꢀtheꢀmod-
uleꢀtoꢀbeꢀinstalledꢀwhileꢀtheꢀhostꢀsystemꢀisꢀoperatingꢀandꢀ
on-line.ꢀUponꢀinsertion,ꢀtheꢀtransceiverꢀhousingꢀmakesꢀ
initialꢀcontactꢀwithꢀtheꢀhostꢀboardꢀSFPꢀcage,ꢀmitigatingꢀ
potentialꢀdamageꢀdueꢀtoꢀElectro-StaticꢀDischargeꢀ(ESD).
Complianceꢀpredictionꢀisꢀtheꢀabilityꢀtoꢀdetermineꢀifꢀanꢀ
opticalꢀtransceiverꢀisꢀoperatingꢀwithinꢀitsꢀoperatingꢀandꢀ
environmentalꢀ requirements.ꢀ AFBR-700SDZꢀ devicesꢀ
provideꢀ real-timeꢀ accessꢀ toꢀ transceiverꢀ internalꢀ supplyꢀ
voltageꢀandꢀtemperature,ꢀallowingꢀaꢀhostꢀtoꢀidentifyꢀpo-
tentialꢀcomponentꢀcomplianceꢀissues.ꢀReceivedꢀopticalꢀ
powerꢀisꢀalsoꢀavailableꢀtoꢀassessꢀcomplianceꢀofꢀaꢀcableꢀ
plantꢀandꢀremoteꢀtransmitter.ꢀWhenꢀoperatingꢀoutꢀofꢀre-
quirements,ꢀtheꢀlinkꢀcannotꢀguaranteeꢀerrorꢀfreeꢀtrans-
mission.
Digital Diagnostic Interface and Serial Identification
Fault Isolation
Theꢀ two-wireꢀ interfaceꢀ protocolꢀ andꢀ signalingꢀ detailꢀ
areꢀbasedꢀonꢀSFF-8431.ꢀConventionalꢀEEPROMꢀmemo-
ry,ꢀ bytesꢀ 0-255ꢀ atꢀ memoryꢀ addressꢀ 0xA0,ꢀ isꢀ organizedꢀ
inꢀ complianceꢀ withꢀ SFF-8431.ꢀ Newꢀ digitalꢀ diagnosticꢀ
information,ꢀ bytesꢀ 0-255ꢀ atꢀ memoryꢀ addressꢀ 0xA2,ꢀ isꢀ
compliantꢀtoꢀSFF-8472.ꢀTheꢀnewꢀdiagnosticꢀinformationꢀ
providesꢀtheꢀopportunityꢀforꢀPredictiveꢀFailureꢀIdentifi-
cation,ꢀComplianceꢀPrediction,ꢀFaultꢀIsolationꢀandꢀCom-
ponentꢀMonitoring.
Theꢀfaultꢀisolationꢀfeatureꢀallowsꢀaꢀhostꢀtoꢀquicklyꢀpin-
pointꢀtheꢀlocationꢀofꢀaꢀlinkꢀfailure,ꢀminimizingꢀdowntime.ꢀ
Forꢀopticalꢀlinks,ꢀtheꢀabilityꢀtoꢀidentifyꢀaꢀfaultꢀatꢀaꢀlocalꢀ
device,ꢀremoteꢀdeviceꢀorꢀcableꢀplantꢀisꢀcrucialꢀtoꢀspeed-
ingꢀ serviceꢀ ofꢀ anꢀ installation.ꢀ AFBR-700SDZꢀ real-timeꢀ
monitorsꢀ ofꢀ Tx_Bias,ꢀ Tx_Power,ꢀ Vcc,ꢀ Temperatureꢀ andꢀ
Rx_Powerꢀcanꢀbeꢀusedꢀtoꢀassessꢀlocalꢀtransceiverꢀcurrentꢀ
operatingꢀ conditions.ꢀ Inꢀ addition,ꢀ statusꢀ flagsꢀTX_DIS-
ABLEꢀandꢀRxꢀLossꢀofꢀSignalꢀ(LOS)ꢀareꢀmirroredꢀinꢀmemoryꢀ
andꢀavailableꢀviaꢀtheꢀtwo-wireꢀserialꢀinterface.
Predictive Failure Identification
Component Monitoring
TheꢀAFBR-700SDZꢀpredictiveꢀfailureꢀfeatureꢀallowsꢀaꢀhostꢀ
toꢀidentifyꢀpotentialꢀlinkꢀproblemsꢀbeforeꢀsystemꢀperfor-
manceꢀisꢀimpacted.ꢀPriorꢀidentificationꢀofꢀlinkꢀproblemsꢀ
enablesꢀ aꢀ hostꢀ toꢀ serviceꢀ anꢀ applicationꢀ viaꢀ“failꢀ over”ꢀ
toꢀaꢀredundantꢀlinkꢀorꢀreplaceꢀaꢀsuspectꢀdevice,ꢀmain-
tainingꢀsystemꢀuptimeꢀinꢀtheꢀprocess.ꢀForꢀapplicationsꢀ
whereꢀultra-highꢀsystemꢀuptimeꢀisꢀrequired,ꢀaꢀdigitalꢀSFPꢀ
providesꢀaꢀmeansꢀtoꢀmonitorꢀtwoꢀreal-timeꢀlaserꢀmetricsꢀ
associatedꢀ withꢀ observingꢀ laserꢀ degradationꢀ andꢀ pre-
dictingꢀfailure:ꢀaverageꢀlaserꢀbiasꢀcurrentꢀ(Tx_Bias)ꢀandꢀ
averageꢀlaserꢀopticalꢀpowerꢀ(Tx_Power).
ComponentꢀevaluationꢀisꢀaꢀmoreꢀcasualꢀuseꢀofꢀtheꢀAFBR-
700SDZꢀ real-timeꢀ monitorsꢀ ofꢀ Tx_Bias,ꢀ Tx_Power,ꢀ Vcc,ꢀ
TemperatureꢀandꢀRx_Power.ꢀPotentialꢀusesꢀareꢀasꢀdebug-
gingꢀaidsꢀforꢀsystemꢀinstallationꢀandꢀdesign,ꢀandꢀtrans-
ceiverꢀ parametricꢀ evaluationꢀ forꢀ factoryꢀ orꢀ fieldꢀ quali-
fication.ꢀForꢀexample,ꢀtemperatureꢀperꢀmoduleꢀcanꢀbeꢀ
observedꢀinꢀhighꢀdensityꢀapplicationsꢀtoꢀfacilitateꢀther-
malꢀevaluationꢀofꢀblades,ꢀPCIꢀcardsꢀandꢀsystems.
2
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