ADSL Introduction

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ADSL Introduction

• ADSL ???????
• ADSL ?????????? Asymmetric Digital
  Subscriber Line ?????????????????????????????????
  ???????????? ????????????? Voice ??? Data
  ?????????????????????????????????
• ?????? ADSL ???????????????????????????????
  (Downstream) ??????????????????????????????
  (Upstream) ??????????????????????????????????????
  ????????????????????????????????????????????????
  ???????????????????????????? ?????????????? Web
  Page ??? Download ???????????????????? ???????

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• ?????????????????? Internet 56k ??? ADSL

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Internet 56k (Dial Up)

• ????????????????? Internet ??????? ADSL
• ???????????????? ( Connect ) ??????? 3 ???
• ?????????????????????????????? Internet ???
• ????????????? Web ??????? multimedia ???
• ??? Download ????????????????? ???????????????????
  ??? download ?????????

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??????????????????? ADSL

• 1. ??????????????????????????????
  ???????????????????? ADSL ????????????????????????
  
• 2. ???????????????? 24 ??.
• 3. ????????????????????????????????????????????
  modem 56K ???????????????????????????????????????
  ??????????????? ??????????????????????????????????
  ???? ???? ??? Download ?????? ???????
• 4. ????????????????????????????
  ??????????????????????
• 5. ???????????? Multimedia ?? Internet ?????
  ???? ?????????????, ??????? ??? ??????? Web

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ADSL2 and ADSL2

• Top Ten improvements
• on ADSL2
• Performance raising the bar
• Loop Diagnostics Tools
• Improved initialization
• Fast start-up
• On-Line Reconfiguration (OLR)
• Power Management (PM)
• Framing
• All Digital Mode
• Higher Layer Adaptation
• Home Installation

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• ADSL ????????????
• ?????????????? ????????????????????????????
  ???? DSLAM ???????????????????????????? ??? Modem
  ADSL ????????????????????????????????????
  ?????????????????????????????????? ????? Splitter
  ?????????????????????????????????
  ????????????????????????? ????????????????????????
  ???????????????????????????????????
  ??????????????????????????????????????????????????
  ?????????????????

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DSL Distance
56 K Modem
56 kbps
none
ISDN
128 kbps Multilink PPP
5.4 km.
Cable Modem
1030 Mbps D/L 128k10Mbps U/L (shared bandwidth)
48 Kmover coaxial cable
Technology For Cable Operator
ADSL
1.58 Mbps D/L 512k1 Mbps U/L
5.4 km.
Asymmetric for Residential
SDSL
2 Mbps
3.0 km.
Symmetric Not standard
G.SHDSL
2 Mbps
5.4 km.
Symmetric Standard
VDSL
1052 Mbps D/L 1.52.3 Mbps U/L
1.5 km.
Very fast - Short reach No standard yet
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ADSL Equipment
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DSL Equipment
Local Loop
DSL Modem DSL Router
CPE Splitter
PC
CO Splitter
Internet
ISP
ATM
DSLAM
BRAS
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Connecting to POTS Splitter
Data
To OSP Cable
Line
Phone
To OSP Cable
Micro Filter
Y Connector
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Modems
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Splitter
Splitter ??????????????????????? ?????????????
14kHz ??? ??????? ADSL ??????????????????????????
??? Splitter ?????????? SDSL (HDSL, G.SHDSL)
??????????????? Splitter ?????????????????????????
???????? ????????? SDSL ???????????? 14kHz ???????
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DSLAMs DSL Access Multiplexer
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Huawei DSLAM Series - MA5100

• MA5100 --gt Use as Aggregator
• 16 Slots --gt 2 MMXs , 14 Service Ports

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??????????????????????????????????????????????????
????? VOIP

• ????????? VoIP ????????????? Voice over Internet
  Protocol ?????????????????????????????????????????
  ?????? ??????????????????????????????????
  ?????????????????????????????? ???????????????????
  ??? 007 008 009 ?????????????? 9 ????????
  ?????????????????????????????? ???????????????????
  ????????????????????????????????????????? IP
  ?????????????????????? ?????????????????????????
  ??????????? ??????????????????? ??? Internet
  Protocol (IP) ????????????????????????????????????
  ?????????????? ???????????????????????????????????
  ?????????????????????????????????????????????????
  

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???????????????? VoIP

• ????????????????????????????????????????????
  ???????????????????????????VoIP
  ????????????????????? ????????????????????????????
  ??? ?????????????????????? ???????????????????????
  ??????? ?????????????????????????????????
  ?????????????????? "???????" ?????????????????????
  ?????????? ??????????????????????????????
  ????????????????? ???????????

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• VoIP ??????????????????????????????????????????
  ???????????????????? ???????????????????????????
  VoIP ?????????????????????????????????????????????
  ? ???????????????????????????? ???????????????????
  ?????? ???????????????????? ???????????????????
  VoIP ???????????????????????? ????????????????????
  ????????????????? ????????????????? 007 008 ????
  009 ???????????? VoIP ?????? ???????????????
  VoIP ?? 3 ?????????????? 1. ???????????????????
  2. ????????????????????? VoIP adapter
  ??????????????? 3. ??????????????????????????????
  ????? ????????????????????????????

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• ???????????????????? VoIP Calls
  ?????????????????????????? VoIP telephone
  ????????????????????????? VoIP ???????????
  ???????????????????????????????????????
  ??????????? ???? 2 ?????????????????????? VoIP
  ??????? ??????????????????????????????????????????
  ??????? ??????????????????????????????????????????
  ?????? ??????????????????????? PSTN (Public
  Switched Telephone Network) ????
  ??????????????????? VoIP ???????? PSTN
  ??????????????????????? "PC-to-Phone"
  ?????????????????????????????????????????????????
  ?????????????? ??????? VoIP ??????????????????????
  ??????????? ?????????????????????????????? VoIP
  ???????????? VoIP ??????????????? ???????????
  "PC-to-PC" ???????????????????? 2
  ??????????????????????????????????
  ???????????????????????? VoIP ????????????????????
  

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???????????? IP Phone
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SATELLITE
MICROWAVE
CABINET
DP
MSU
RSU
FIBER OPTICS FIBER OPTICS
MANHOLE
TRANSMISSION NETWORK
PRIMARY CABLE
DROP WIRE
SECONDARY CABLE
LOCAL CABLE NETWORK
NETWORK CONFIGURATION
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• Web Multimedia

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Web Test Speed

• http//www.thaicybersoft.com

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Web CAMERA

• http//www.earthcam.com/usa/newyork/timessquare/li
  vestream.html

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