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SPDforLANandcoaxialPowerlineSPDSignallineSPDSPDforLANandcoaxialOthersMetalOxideVaristorStatusindicationThestatusofdeteriorationofSPDperformanceduetolightningsurgeinvasionisindicatedbytheblueandreddisplayratiosonthewindow.IndicatestheprogressofSPDperformancedegradationasapercentageofred.•Normal:Blue•Replacementrecommendation(SPDperformanceisseverelydegraded.):Morethanhalfred(Lessthanhalfblue)•Replace(SPDperformanceislost.):DeteriorationcontactoutputchangesleedDeteriorationcontactoutputterminalteriorationontatottterinalInstallationexampleSPDforDataNetworksandEthernetApplications|OLA-CAT6SWithindicator71