(LAN)(Wide Area Network, WAN)(Public Switch Telephone Network, PSTN)

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(Wide Area Network, WAN)(LAN )

6-1

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()6-1

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(Internet)LANWAN Wide Area Network, WAN(1).PSTN(2).Leased Line(3).(Frame Relay)(4).(ISDN)(5).ADSL(6).Cable Modem

6-1

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6-1

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(Baseband Transmission) (Time Division Mutliplexing, TDM) (Broadband Transmission)(Frequency Division Mutliplexing, FDM)

6-1

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6-1

*

6-1

(BaseBand)(BroadBand)()()(TDM, Time Division Multiplexer)(FDM, Frequency Division Multiplexer)

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()

6-1

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24

6-1

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(Dial-up)()ISP

6-1

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6-1

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6-1

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(Public Switched Telephone NetworkPSTN)(Circuit Switching)64Kbps( full duplex ) (connection oriented)

6-1

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6-1

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(Package Switching)()""

6-1

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6-1

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(Cell Switching)(cell): (Asynchronous Transfer ModeATM)6-1

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: (Asynchronous Transfer ModeATM)6-1

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(Modem, Modulator and DEModulator)016-2 PSTN()

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MODEM6-2 PSTN()

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6-2 PSTN()

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Modem56Kbps(Narrow Band)56Kbps(Broard Band)NotebookModem

6-2 PSTN()

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ADSLAsymmetric Digital Subscriber Line()/

6-3 ADSL

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ADSL(Upstream)25KHz160KHz64Kbps ~ 640Kbps(Downstream)240KHz1.5MHz512Kbps ~ 8MbpsPOTS4KHzPOTSPlain Old Telephone Service

6-3 ADSL

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ADSL

6-3 ADSL

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ADSL ADSL Modem

6-3 ADSL

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ADSLIPIPIP

6-3 ADSL

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IP()PPPoEIPIP1.5

6-3 ADSL

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IP()IP(SOHO)

6-3 ADSL

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Hinet6-3 ADSL

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ADSL256K/64K1M/64K2M/256K2M/512K8M/640K12M/1M

6-3 ADSL Hinet

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ADSL RouterADSL ModemRouterRJ-45 ADSL Router

6-3 ADSL

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Cable ModemCable ModemCable Modem27M~36Mbps768K~10Mbps800Kbps~2Mbps

6-4 Cable Modem

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Cable Modem 6-4 Cable Modem

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Cable Modem6-4 Cable Modem

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Cable ModemCable Modem

6-4 Cable Modem

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6-4 Cable Modem

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Cable Modem

6-4 Cable Modem

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ADSLCable Modem 6-4 Cable Modem

ADSLCable Modem8Mbps640K(*)27M~36M768K~10M(*)*Cable ModemADSL(Race Adaptive)Tree and BranchHinet

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(Fiber to the home, FTTH)6-5

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ISP6-5

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(Fiber To The Home, FTTH)(Fiber To The Building, FTTB)(Fiber To The Curb, FTTC)(Fiber To The Cabinet, FTTCab)6-5

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2007146002010240FTTH6-5

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FTTB6-5

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FTTHCable ModemADSL6-5

Cable ModemADSL2M~5M80K~1M64K~1M10M~100M230K~10M256K~12MVLANPPPoE100MVDSLCable ModemADSL100M12M1M

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ISDN (Integrated Services Digital NetworkISDN)

6-6 ISDN

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HinetISDN 6-6 ISDN

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ISDNB(Bearer) D(Delta) ISDN (Basic-Rate ISDN BRI) (Primary-Rate ISDNPRI)

6-6 ISDN

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(BRI) B Channels D Channel 2B+D (PRI)23 B Channels D Channel 23B+D 1.544 Mbps T1 30 B Channels D Channel 30B+D 2.048 Mbps E1 6-6 ISDN

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ISDN Modem6-6 ISDN

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ISDN(video conference)6-6 ISDN

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ISPT1T3 1960 1.544Mbps44.736Mbps..6-7- T-Carrier

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(TANET) T3, T16-7- T-Carrier

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T-Carrier()T-Carrier(MUXMultiplexer)T1Modem6-7- T-Carrier

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T-Carrier 6-7- T-Carrier

64Kbps1T11.544 Mbps24T26.312 Mbps96T344.736 Mbps672T4274.760 Mbps4032

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E-carrierE-carrier E1E1 2.048 Mbps 30

6-7- T-Carrier

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E-Carrier 6-7- T-Carrier

64Kbps1E12.048 Mbps30E28.448 Mbps130E334.368 Mbps480E444.736 Mbps672E5565.148 Mbps7680

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HinetT16-7- T-Carrier

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Asynchronous Transfer ModeATM ATM(Cell) 53Bytes

6-8(ATM)

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CICSO ATM Router

ATM535bytes48bytes

6-8(ATM)

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ATM Cell 6-8(ATM)

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ATM6-8(ATM)

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ATM VPN

6-8(ATM)

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6-9

/PSTN56KADSL64K1MCable Modem2M/FTTH2M10MISDNSOHO()128KLeased Line1.544Mbps

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Q&A