A Brief History of FaxFax ComponentsGroup ClassificationsSpecifications and StandardsFax ModulationsFax MessagingPhases of a Fax CallMessage Format OverviewAnalyzing a Basic Fax CallCNG ToneCED ToneDIS, NSF, and CSI MessagesDCS and TSI MessagesTCF, CFR, and FTT MessagesMPS, EOP, EOM, MCF, RTP, RTN, and DCN MessagesOther T.30 MessagesUnderstanding Error Correction ModeECM Call AnalysisPPS and PPRImportant G3 TimersSuper G3 FaxingComparison of SG3 and G3Super G3 Call AnalysisPage EncodingModified HuffmanModified READModified Modified READSummary