[????] ??? ??? ????

? ???? ????? 256kbps? ??? ???? ADSL?? ???
?? ???? ???.
? ?? ??? ????? 200kbps? ???? ???.
-?? FCC '99? Inquire Concerning the Deployment of Advanced
xDSL(?????)(x-Digital Subscriber Line) ¨C IDSL, ADSL, VDSL
HFC(????? ????? ???: Hybrid Fiber Coaxial)
FTTH/O(?????:Fiber to the Home/Office)
PLC(?????:Power Line Communication)
PAN(??? ??? ??:Power Area Network)
IMT-2000 CDMA2000 MC3x
WLL ??? B-WLL(??? ?? ????:Broadband Wireless Local Loop)
????????
 OECD 30???? 22?? Xdsl ??? ??
 21?? ??? ?? ??? ??
 ???? ¨C ??? ???? ?? 5?? 71%??? ??
2004? ADSL??? ??? ????? ?? ? ??? ??
 ???/??? ??- ??? ??
97? 11? ???? ADSL??? ??? ??
?? ??? ??? 1?? ??? ??? ??
98? ?? 99? 1479%, 2000? 567%?? 2001? 70%??
2002??? 2006? ? ?? 8.2% ?? ?? ???? 1,213??(?????)
???? ???? ??
??? ?? ??? ?? ??, ??? ??, ???? ?? ????? ????? ??.

??? ???? ( ?? ??????? ????? ???? ?? ?? ??? ? ??)

?? Fixed cost ? ??, Marginal Cost ? 0? ???
??? ??? ??? ??? ?? ??
xDSL??? ????
?? ???? ?? ????? ???? ?? ???? ??
????? ???
? ????? ???? ?????? VDSL?? ????? ???? ??? ??
? ????? ??? ?? ?? ???? ??? ??
?? ???? ?? ???? ???? ??? ?? ??
?? ?? ? ?? ?? ??