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2007(07)CHINADIGITALCABLETV:TN943.6:B:1007-7022(2007)07-0637-06HFC,(,044000):EPON,HFC,CMTS+CMEPON+EoC/LANWDMFTTH,,:HFC;;CMTS+CM;EPON+EoC/LAN;DesignandDiscussionofHFCTwo2wayNetworkImprovementsYAOTian2ming,ZHANGTian2min(YunchengBroadcast&TelevisionStation,ShanxiYuncheng044000,China)Abstract:ThispaperintroduceshowEPONworksandhowtocarryoutimprovementstoHFCnetworktrans2mission,forcusingonCMTS+CM,EPON+EoC/LANandImplementationofFTTHnetworkbyusingWDM.Italsomakesacomparisonandgivesusefulideas.Keywords:HFC;Two-wayimprovements;CMTS+CM;EPON+Eoc/LAN;technology,,IPTV,,,,,,,,HFC,EPONHFC1EPON(EthernetPassiveOpticalNet2work,EPON),1(OpticalLineTerminal,OLT)(OpticalNetworkUnit,ONU)1(PassiveOpticalSplitter,POS),,1,OLTPOSONU,(TDMA)ONUOLT,ONU1EPONOLTEPON,HFC:(19612),,,,E-mail:ytianming@163.com;(19382),,,736,InternetPSTN,ONU,ONU,OLTONU,,OLT,,OLTONU,ONU;OLTONU,ONU,OLTONUPOS(),,,,ONUHFC,,OLT,,,,EPON,,,EPONHFC,:(1)OLTONU,,,,,,,(2)WDM(WaveDivisionMultiplexing),(1490nm,1310nm),WDM,(3):EPON1.25Gb/s,,TDMA(4)EPON,(5)EPON,FTTB(),FTTH()(6)EPON,2HFCHFC,,,(FTTC)(FTTP),,HFCFTTCFTTP,110002000,,,,,,2,OLT2FTTC,,300500,,,,,,,,,,,2468,,,,,,OLTONU,836:HFC200707,,ONUOLT3HFCHFC,CMTS+CMEPON+EoCEPON+LAN3.1CMTS+CMCMTS+CM,3,,CATV(FDM),(SDM),,FDM3CMTS+CMCMTS,,CableModem,,,PCTVTELCMTS+CMDOCSIS,,200684DOCSIS3.0,120Mb/s160Mb/s,IPv6CMTS,200300,FTTB,CMTSHFC,200,,,CMTSCM,FTTB,PON(),HFC,,CMTSCM,,PON,,CMTS+CM,CableModem,HFC,,,,,,,3HFC3.2EPON+EoCEPON+EoCEPONEoCHFC,(1)EPONHFC,,WDMOLTONU1(2)EoC(Ethernet2over2Coax)(Coax)EoCHFC,,EoC,45860MHz020MHz,,75,936200707:HFC100(UTP),,,,,4,/,,1,,4EoC5,,,EoC5(3)EPON+EoC,EPONHFC,EoCCATV,SDMEoC,HFC,IP,66,CATV,CATVEoC();ONU,ONUEoC;EoCCATVIPDataFDM,,,EoC,CATV,HFC,,6EPON+EoC4,1,23,6IP,,,WDM,,,,,WDMHFC,:HFC,;,,,;IPEoCEoC,,,,;,,;,10Mb/s,3.3EPON+LANEPON+LANEPON+EoC,SDM,HFC,PONIP,ONU,77,,,046:HFC2007077EPON+LAN,ONU,,,,,,InternetVODIP,10Mb/s100Mb/sHFC,,:LANCATV,,,,,,HFC,,3.4WDMFTTHEPONFTTH,,HFC,,WDM,,,,,8CATVRF1550nm,1310nm,1490nm,1550nm1490nm8WDMFTTHWDM1,PON,WDM,1550nm,1490nm(ONU)IP,,PONFTTH,116PON20km,132PON10km,164PON5km,64PON19.5Mb/s,VOD,FTTHEPON,,,,FTTH,4HFC:PON,HFC,HFC,CMTS+CM,HFC,;EPON+EoCHFC;EPON+LAN,HFC,CMTS+CM,,;EPON+EoC,ONU,,,HFC,,,;EPON+LAN146200707:HFCEPON+EoC,,,,5HFC2090,CMTS+CM,,,,2006,25,,HFC,,,,?,EPON+EoC/LAN,HFC,:[1]HFC[EB/OL].http//[2].HFC[J].,2000,(7):33-42.[3].HFC[M].:,2003.[4],,.EPON[J].,2003,(7):10-13.[5].HFC[J].,2005,(6):64-68.[6].EPON[J].,2006,(10):54-60.[:2007203221],(,256100)1,,+5V,3.3V5V12V30V,(DVS-398VDVS-398H),4.5V7.6V21V30V4,,,,,,,,,,,,,,,,,,,,,,5V,,5V,5V21:DVS-398E,,0V,,0V,,,,2:DVS-398H,,,,,5V,CPUL64108,4.5V,,,4.5V,L641083.3VPQ3RD13,PQ3RD13,PQ3RD130V,5V,,,PQ3RD13[:2007201214]246:HFC200707