56K Modem ? Cable modem and ADSL

1
?????????
2
56K Modem ? Cable modem and ADSL
56k Modem Cable modem ADSL
???????(bps) Upload33.6K Download56K ?? Upload1024K Download10240K ?? Upload256K Download6144K Upload64K640K Download512K6M (HiNet?SEEDNet)
?? ?? ?? ??
?? ?? ?? ??
3
56K Modem ? Cable modem and ADSL
56k Modem Cable modem ADSL
???????(bps) ???????? ????10K?? ?? Upload600K Download1856K ?? Upload600K Download1600K Upload56K Download400K (HiNet?SEEDNet)
IP ISP?? ?? ??
?? ??,???? ???? ???
4
56K Modem ? Cable modem and ADSL
56k Modem Cable modem ADSL
?? ??? ??? ???(?????? ?????)
?? ??? ??? ????????
??? 96.8 1.2 0.7
??? ?? ?????? ???????????????????? ??????????????????
5
56K Modem ? Cable modem and ADSL
56k Modem Cable modem ADSL
?? ?????????????? ?????????????? ?????????????????????????????????????????
?? ???????????,modem????????? ??????????????????????????????? ???????????????????????????????????????4??????????
6
56K Modem ? Cable modem and ADSL
56k Modem Cable modem ADSL
??? PC???????? PC??????????????? PC???????????
??? ?????? ????????????? ?????????????
?? ???? ???? ????
??????? HiNet?SEEDNet? ???????????? HiNet?????
7
Worldwide Forecast of Total Cable Modems
K Units
FromGartnerGroup Dataquest
8
Worldwide Forecast of Total xDSL CPE
K Units
FromGartnerGroup Dataquest
9
????

• ?????(Cable Modem)
• ????(CMTS)
• ?????????(ADSL)
• ????(DSLAM)

10
????

• Correlant ?CM???Broadcom????,???????????
• ??????DOCSIS Cable Modem ?2000???????3040

11
??????

• ??Cable Modem???????????????????????????
• ?????,??????????? ?????????????????????
• ?????Cisco ? Nortel ? Motorola ? 3COM ? COM21 ?
  Terayon ? GI ? Toshiba

12
?????????????

• ????(Integration) ? ??????
• ??????,????? ? ????
• ????,???? ? ???????,????

13
????

• ????????????????????????????????????,?????????????
  ?
• ?????Correlant???San Diego?????????????,???OEM????
  ???????
• ???????????????????????????????,???????????,??????
  ??,??????????

14
?????????

• Cable Modem?????????????,???????????Cable???,??Cab
  le Modem???,???????Cable???????
• ??Cable Modem???????????????,???PC?Set-Top-Box????
  ??,?????????,?????????,????????????,?????????

15
????SMT AI
16
????M/IT/UTESTPACK
17
Cable modem????
18
??????????
19
????????

• ????-??????
• ????-????
• ????-????

20
????

• ???????
• ??????
• 25.010247 MHz
• ??????
• -15ppm25ppm
• ??
• 2500987225010872
• Hz

21
???????
22
?????Ca?
??????µ? X?????,Ca????,??????????????
23
Ca??????
24
???????

• A?-??????????????????????.
• B?-????????A?
• C?-???????????????????????????
• D?-???????,?????????????