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<H2><A NAME="s8">8. $BIUO?(B</A></H2>
<H2><A NAME="ss8.1">8.1 FAQ</A>
</H2>
<P>$B$3$N%;%/%7%g%s$O(B ADSL $B$N(B FAQ $B$G$9!#(B
<P>
<OL>
<LI>$B<ALd!'(B ADSL $B$NI8=`2=$O$I$&$J$C$F$$$k!)(B
<P>$BEz!'(B $B$$$/$D$+$"$j$^$9!#(BThe U.S. Bell Operating Companies $B$O!":G6a(B Discrete
Multi-Tone (DMT) $B$N(B ANT (ANSI T1.413) $B$rI8=`2=$7$?$HH/I=$7$^$7$?!#JF9q$N(B
$BB>$N(B DMT $BJ}<0$O$3$l$K=`5r$9$k$O$:$G$9!#B>$N(B ANT $B$H$7$FL\N)$D$b$N$O!"(B
Carrier-less Amplitude Phase Modulation (CAP) $B$G$9!#$b$A$m$sN>J}<0$K$O8_49@-(B
$B$O$"$j$^$;$s!#(B
<P>$BI8=`2=$K4X$7$F(B DMT $BJ}<0$r:NMQ$9$k%Y%s%@!<$N;kE@$+$i8+$?N>J}<0$NHf3S$O!"(B
<A HREF="http://www.aware.com">Aware</A> $B$G8+$k$3$H$,$G$-$^$9!#$3$N(B
$BOCBj$K$D$$$F:G$b>\:Y$J>pJs$rDs6!$7$F$$$^$9!#(B
<P>ANSI $B$N5,3J=q$N<L$7$O9b2A$G$9$,!"<!$N$H$3$m$KCmJ8$9$k$3$H$,$G$-$^$9!#(B
American National Standards Institute
<A HREF="http://www.ansi.org">ANSI Home Page</A> <BR>
Asymmetric Digital Subscriber Line (ADSL) Metallic Interface <BR>
ANSI TI.413-1995 <BR>
$BCm0U!'(B ANSI TI.413 2 $BHG(B $B$O(B 1997 $BG/(B 9 $B7n(B 26 $BF|$KH/8z$5$l$^$7$?!#(B
<P>
</LI>
<LI>$B<ALd!'(B ADSL $B$N(B ANT $B$K(B ATM $B$r@\B3$G$-$^$9$+!)(B
<P>$BEz!'(B $B2DG=$G$9!#(BADSL $B$N(B ANT ($B>/$J$/$H$b(B Alcatel $B%P!<%8%g%s(B) $B$N$$$/$D$+$O!"(BATM
$B$N(B 25Mbps $B%$%s%?!<%U%'!<%9$r;}$C$F$$$^$9!#$3$l$r(B PCI $B$N(B NIC $B$K;I$9$3$H$,$G$-(B
$B$^$9!#$7$+$7$=$N$h$&$J%+!<%IMQ$N(B Linux $B%I%i%$%P$,$"$k$3$H$r<*$K$7$?$3$H$O$"$j(B
$B$^$;$s!#(B
<P>
</LI>
<LI>$B<ALd!'(B $B2?$G(B ADSL $B$OMM!9$JB.EY$N<oN`(B(384/1.5/8M/20M/$B$=$NB>(B)$B$,$"$k$s$@!)(B
<P>$BEz!'(B $B:,K\E*$JLdBj$O!"$h$jBPF<@~$N2s@~$,(B 100 $BG/A0$N@_7W$K$b$H$E$$$F$$$k$3$H$G$9!#(B
$B%"%J%m%0EEOC$J$i2?$bLdBj$O$"$j$^$;$s$,!"%G%8%?%k?.9f$rN.$9$3$H$O!"2s@~$N(B
$BIJ<A$KD)$`9T0Y$H$J$j$^$9!#K:$l$F$O$$$1$J$$$N$O!"2s@~$NEEOC2q<R$+$i$N5wN%$,(B
$B1s$/$J$l$P$J$k$[$I!"DL?.B.EY$,Mn$A$F$7$^$&$H$$$&$3$H$G$9!#2s@~:GE,2=5;=Q$N(B
$B$*$+$2$G!"$?$$$F$$%G%8%?%k?.9f$b$&$^$/07$($^$9!#$7$+$7A4$F$N4D6-$GF1$8BS0hI}(B
$B$r3NJ]$9$k$3$H$O$G$-$^$;$s!#FC$KD95wN%(B(5.5 km $B0J>e(B)$B$K$J$l$P$J$*$5$i$G$9!#(B
$B%Y%s%@!<$N9-9p$K=P$F$$$kMM!9$JBS0hI}$N@_Dj$O!"MM!9$J;T>l6%Ah$N7k2L$r1G$7=P(B
$B$7$F$$$^$9!#EEOC2q<R$O2?$H$+$7$FDL?.B.EY$N!VI8=`!W$r3NN)$7$h$&$H$d$C$-(B
$B$K$J$C$F$$$^$9!#;d$O!"(B384k $B$+(B 1.5 Mbps $B$,I8=`$K$J$k$N$G$O$J$$$+$H;W$C$F$$$^(B
$B$9!#$h$j9bB.$J2s@~$O!"FC<l$J>u67$d4D6-$K$@$1MxMQ$5$l!"9-$$;T>l$rF@$k$3$H$O(B
$B$J$$$H;W$$$^$9!#(B
<P>$B<!$N<ALd$bFI$s$G$_$F$/$@$5$$!#$H$$$&$N$b2s@~>e$N>c32$O!"MM!9$J2s@~B.EY$r@8$_(B
$B=P$9860x$N(B 1 $B$D$G$9$+$i!#(B
<P>
</LI>
<LI>$B<ALd!'(B $B%V%j%C%8!&%?%C%W!"Au2Y%3%$%k$N$h$&$J2s@~>c32$,$"$k$H!"(BADSL
$B$r;HMQ$G$-$J$$$N$G$7$g$&$+!)(B
<P>$BEz!'(B $B%m!<%G%#%s%0!&%3%$%k$O!"EEOC2s@~$G$N2;@<$rEA$($k<~GH?t$NEAAwFC@-$r8~>e(B
$B$5$;$k%$%s%i%$%s!&%$%s%@%/%?%s%9$G$9!#4pK\E*$K!"(B"$B2s@~$,;HMQ$5$l$k(B"$B$H(B
$B9b<~GH$N%(%M%k%.!<$rDc<~GH$KM?$($^$9!#$H$F$bD9$$EEOC@~(B(2.7 km $B0J>e(B)$B$N>l9g(B
$B$K$h$/MQ$$$i$l$^$9!#(B
<P>$BC1$K(B"$B%V%j%C%8(B"$B$H$$$&>l9g$K$O!"%V%j%C%8!&%?%C%W$r0UL#$9$k$3$H$H$7$^$9!#(B
$B8E$/$+$iEEOC$,0z$+$l$F$$$?CO0h$G$O!"EEOC$NG[@~$O2?8.$+$K(B 1 $BK\$N3d9g$G(B
$B0z$+$l$F$$$^$7$?!#$b$A$m$s$=$l$i$N=;Bp$N=;=j$O0c$$$^$9$,6a=j$G$9!#G[@~(B
$B$5$l$F$$$J$$>l9g$O!"B(@J$K(B"$B%V%j%C%8!&%?%C%W(B"$B$r;H$C$F4{$K@\B3$5$l$F$$$k(B
$B2s@~$+$iG[@~$7$F$7$^$$$^$9!#(B
<P>$B%G%8%?%k!&%k!<%W!&%-%c%j%"!'(B 2 $B?D$N@~(B 1 $BK\$GJ#?t$N2;@<$NEAAw$,$G$-$k$$$m$$$m(B
$B$J%7%9%F%`$,$"$j$^$9!#$3$N%7%9%F%`$O;HMQ$9$k<~GH?t$r9bDc$5$;$?$j!"2;@<$r%G%8(B
$B%?%k2=$7$?$j!";~4V$d%3!<%I!"$=$NB>$K$h$C$FEEOC2s@~$rJ,3d$9$k$3$H$,$G$-$^$9!#(B
$B%Z%"!&%2%$%s$H8F$P$l$k$3$H$,B?$$$H;W$$$^$9!#(B
<P>$B>e5-$N5!:`$O!"9b<~GH$rMxMQ$7$?%G!<%?E>Aw$KMM!9$J0-1F6A$rM?$($^$9!#(B
<P>$B%m!<%G%#%s%0!&%3%$%k$O!"9b<~GHItJ,$r40A4$K%U%#%k%?%j%s%0$7!"Dc<~GH$rDL$7$^$9!#(B
$B$^$?!VCY1d%(%s%Y%m!<%W!W$H8F$P$l$k!"$"$k<~GH?t$rB>$N<~GH?t$KM%@h$5$;$F<u$1(B
$B<h$l$k$7$/$_$rJQ99$7$F$$$k$h$&$G$9!#$D$^$j!"$"$k2;@<%G!<%?$,<!$KMh$k$Y$-(B
$B%G!<%?$rK832$9$k2DG=@-$,$"$j$^$9!#(B
<P>$B%V%j%C%8!&%?%C%W$O!"?.9f$NGHD9$,D9$$>l9g$O%7%c%s%H!&%-%c%Q%7%?%s%9(B $B$H$7$F(B
$BF0:n$7!"GHD9$N(B $B$*$h$=(B 1/4 $B$N>l9g$OBS0hDL2a%U%#%k%?$H$7$FF0:n$7$^$9!#$D$^$j(B
$B$"$kFCDj$N<~GH?t$r<+M3$KDL2a$5$;$k$3$H$K$J$j$^$9!#(BDMT $B%b%G%`$NFCDj$N2;@<(B
$B?.9f$OJ,N%$5$l$F$7$^$$!"<u?.B&$N%b%G%`$KFO$+$J$/$J$j!"7k2LE*$K$KEEOC2s@~(B
$B$NBS0h$r69$a$F$7$^$$$^$9!#(B
<P>$B%Z%"!&%2%$%s$O!"0l2s@~$GJ#?t$NEAAw$rF1;~$K9T$&$?$a$K!"0l$D$NEAAw$K;H$($kBS0h(B
$B$r@)8B$7$^$9!#$3$l$O%"%J%m%0?.9f$K$b%G%8%?%k?.9f$K$bE,MQ$5$l$^$9!#(BDMT $B$K$h$k(B
$BEAAw$G;H$o$l$k<~GH?t$O%Z%"!&%2%$%s$K$h$C$F%U%#%k%?$5$l$F$7$^$$$^$9!#(B
<P>$B!V2CF~<T@~$K$*$1$k?.9fJ}<0$HEAAwJ}K!$N<j0z$-!W(B(Whitham D. Reeve $BCx!"(B
IEEE Press 1992, ISBN 0-87942-274-2) $B$O!"EEOC2s@~$K$*$1$kEAAw$NFC@-$KBP$7$F(B
$B2s@~$ND9$5!"%V%j%C%8!&%?%C%WB>$,M?$($k1F6A$ND4::J}K!$N=8Bg@.$G$9$,!"$+$J$j(B
$B9b2A$G$9!#(B
<P>
</LI>
<LI>$B<ALd!'(B ADSL ANT $B$K$D$$$F$N<BNc$O$"$j$^$;$s$+!)(B
<P>$BEz!'(B $B$"$j$^$9!#$3$N5;=Q$NH/C#$OF|?J7nJb$G!"(BHOWTO $B$G$ODI$$$-$l$^$;$s!#(B
ADSL ANT $B$K$D$$$F$O(B
<A HREF="http://www.adsl.com"> ADSL Forum Home Page </A>.
$B$r;2>H$5$l$k$HNI$$$G$7$g$&!#$3$3$+$i3F%Y%s%@!<$N%[!<%`!&%Z!<%8$K9T$1$P!"(B
$B8=>u$,$o$+$k$O$:$G$9!#(B
<P>$B;d$,Ds6!$G$-$k5;=Q>pJs$O(B 1998 $BG/(B 6 $B7n8=:_$N$b$N$G$9!#(B
<P>
<UL>
<LI> 10/100baseT $B%$%s%?!<%U%'!<%9$r;}$D(B ANT $B%k!<%?(B
<P>
$BNc!'(B Examples: Flowpoint 2000 DSL (CAP), Netspeed Speedrunner 202 (CAP),
Speedrunner 204 (CAP), 3COM Viper-DSL (CAP), StarNet Ezlink 500/100 (DMT),
Westell ATU-R-Flexcap (CAP), Aware x200
<P>
</LI>
<LI> 10/100baseT $B%$%s%?!<%U%'!<%9$r;}$D(B ANT $B%V%j%C%8(B
<P>$BNc!'(B Alcatel A1000 (DMT), Westell ATU-R-Flexcap2 (CAP)
<P>
</LI>
<LI> ATMF $B%$%s%?!<%U%'!<%9$r;}$D(B ANT
<P>$BNc!'(B Alcatel A1000 (DMT), Netspeed Speedrunner 203 (CAP), Ariel Horizon II
<P>
</LI>
<LI> V.35 $B%7%j%"%k!&%$%s%?!<%U%'!<%9$r;}$D(B ANT $B%V%j%C%8(B(T1 $B$b$7$/$O(B $B%7%j%"%k(B
$B2s@~$r;HMQ$9$k%k!<%?(B)
<P>$BNc!'(B Westell ATU-R
<P>
</LI>
<LI> USB $B%$%s%?!<%U%'!<%9$r;}$D(B ANT
<P>
Intel $B<R$,?d?J$7$F$$$k$h$&$G$9!#(B
<P>
</LI>
<LI> ANT/NIC $B%+!<%I(B
<P>$BNc!'(B Netspeed PCI Runner (CAP), Efficient Networks Speedstream 3020 (DMT)
<P>$B$3$3$K>e$2$i$l$?@=IJ$NF0:n3NG'$O$7$F$$$^$;$s!#Nc$H$7$F$"$2$?$@$1$G$9!#(B;-)
<P>
</LI>
</UL>
</LI>
</OL>
<P>
<H2><A NAME="ss8.2">8.2 $B%j%s%/(B</A>
</H2>
<P>
<UL>
<LI>
<A HREF="http://www.adsl.com">ADSL Forum Home Page</A>
ADSL $B%Y%s%@!<Ds6!$K$h$kAm9gE*$J%&%(%C%V!&%5%$%H$G$9!#(BADSL $B$K4X$7$F$N$H$F$b(B
$B=<<B$7$?>pJs$,F@$i$l$^$9!#(B
<P>
</LI>
<LI>
<A HREF="http://www.alumni.caltech.edu/~dank/isdn/adsl.html">Dan Kegels ADSL Page</A>
xDSL $B$K4X$7$F$NAm9gE*$J>pJs$,$"$j$^$9!#%Y%s%@!<!"%5!<%S%9!&%W%m%P%$%@!"$=$NB>(B
$B$N%j%s%/$,$"$j$^$9!#(B
<P>
</LI>
<LI>
<A HREF="http://www.pacbell.com/products/business/fastrak/adsl/index.html">PacBell's ADSL Page</A>
Pacific Bell $B$OCO0hEEOC2q<R$G!";d$,MxMQ$7$F$$$k(B ADSL $B$N%W%m%P%$%@$G$9!#(B
<P>
</LI>
<LI></LI>
<LI>
<A HREF="http://www.rc.lsa.umich.edu/~jeremie/adsl/">Jeremie's Unofficial Ameritech ADSL FAQ</A>
<P>
</LI>
<LI>
<A HREF="http://www.telechoice.com/xdslnewz/indexDSL.cgi">Telechoice xDSL News Page</A>
<P>
</LI>
<LI>
<A HREF="http://www.geocities.com/Paris/Metro/5013/adsl.html">ADSL Deployment 'round the World</A>
$B@53N$J0lMwI=(B - $B%W%m%P%$%@!"6b3[!"@\B3B.EY(B etc - $B$,Gd$jJ*$G$9!#;d$NCO6h$K$D$$$F(B
$B$N8m$j$O$J$$$h$&$G$9!#(B
<P>
</LI>
<LI>
<A HREF="http://www.bell-atl.com/adsl">Bell Atlantic ADSL Home Page</A>
<P>
</LI>
<LI>
<A HREF="http://homepage.interaccess.com/~jkristof/xdsl-faq.txt">comp.dcom.xdsl FAQ</A>
<P>
</LI>
</UL>
<P>
<H2><A NAME="ss8.3">8.3 $B<U<-(B</A>
</H2>
<P>$B$3$N(B $B%I%-%e%a%s%H$r=q$/$K$"$?$C$F!">pJs$r4s$;$F$/$@$5$C$?3'$5$s$K46<U$$$?(B
$B$7$^$9!#(B
$B9W8%$7$F$$$?$@$$$?J}!9(B($B;d$b4^$a$F!*(B)$B$N0BA4$N$?$a!"%9%Q%`!&%a!<%k$h$1$r$7$F(B
$B$$$^$9!#%"%I%l%9I=5-$N(B "X" $B$r$H$C$F$/$@$5$k$h$&$*4j$$$$$?$7$^$9!#(B
<P>
<UL>
<LI><B>B Ediger</B> (Xbediger@csn.net) $B2s@~>c32$K$D$$$F$N>\:Y$J2r@b(B</LI>
<LI><B>C Wiesner</B> ( Xcraig@wkmn.com) ADSL $B4XO"$N(B URL $B$N0lMw(B</LI>
<LI><B>J Leeuw</B> ( Xjacco2@dds.nl) $BFC$K%h!<%m%C%Q$K$*$1$k(B ADSL $B$K$D$$$F$N(B
tips</LI>
<LI><B>J Kass</B> ( Xjeremie@umich.edu) $BHs8x<0$J(B Ameritech $B$N(B ASDL FAQ</LI>
<LI><B>N Silberstein</B> ( Xnick@tpdinc.com) Netrunner $B$HJF9q:G0-$N%W%m%P%$%@(B
$B$H$N$d$j<h$jCL$K$D$$$F(B</LI>
</UL>
<P>
<H2><A NAME="ss8.4">8.4 $BF|K\8lHG<U<-(B</A>
</H2>
<P>$BK]Lu$KEv$?$C$F!"2<5-$NJ}$K$*@$OC$K$J$j$^$7$?!#$"$j$,$H$&$4$6$$$^$7$?!#(B
<UL>
<LI><B>$B?e86!wI=@i2H(B $B$5$s(B</B></LI>
<LI><B>$BsnF#(B $B44(B $B$5$s(B</B></LI>
</UL>
<P>
<P>
<H2><A NAME="ss8.5">8.5 $BMQ8l2r@b(B</A>
</H2>
<P>$B$3$N(B FAQ $B$K$G$F$/$k@lLgMQ8l$N2r@b$G$9!#(B
<DL>
<DT><B> $B$h$jBPF<@~2s@~(B</B><DD><P>$BEEOC2q<R$+$iG[@~$5$l$F$$$k(B 2 $B?D$N%D%$%9%H!&%Z%"%1!<%V%k(B
$B$G!"8\5RB&$G=*C<$5$l$F$$$k!#(B
<DT><B>ADSL</B><DD><P>Asymmetric Digital Subscriber Line $BHsBP>N%G%8%?%k2CF~<T@~!#(B
<P>
<DT><B>ANT</B><DD><P>ADSL Network Termination ADSL $B%M%C%H%o!<%/=*C<AuCV(B(ADSL $B%b%G%`(B)$B!#(B
<P>
<DT><B>ATM</B><DD><P>Asynchronous Transfer Mode $BHsF14|E>Aw%b!<%I(B - $B9bB.$K%Q%1%C%H$N(B
$B%9%$%C%A%s%0$r9T$&$3$H$K$h$C$F!"(B 155 Mbps $B$+$i(B 2Gbps($B8=>u$G$O(B)$B$NB.EY$rDs6!(B
$B$7$^$9!#%$%s%?!<%M%C%H$X$N%P%C%/%\!<%s@\B3$N$?$a$KMxMQ$5$l$F$$$^$9!#(B
<P>
<DT><B>ATMF-25Mbps</B><DD><P>ATM $B%U%)!<%i%`8xG'$N%$%s%?!<%U%'!<%9(B - 25Mbps $B$NB.EY$,=P$;!"(B
PCI$B%P%9$N(B NIC $B$G;HMQ$5$l$F$$$^$9!#(BANT $B$H(B PC $B4V$G;HMQ$5$l$k%$%s%?!<%U%'!<%9$N(B
$B0l$D$G$9!#(B
<P>
<DT><B>Central Office</B><DD><P>$BCf1{6I!#(B 2 $B$D$N0UL#$,$"$j$^$9!#(B- 1) $BEEOC4XO"5!4o$,@_CV(B
$B$5$l$F$$$kEEOC2q<R$N7zJ*!#(B 2) $BEEOC$N%@%$%d%k!&%H!<%s$r=PNO$9$k2;@<8r495!!#(B
<P>
<DT><B>CPE</B><DD><P>Customer Premises Equipment $B8\5RC<Kv(B - $BEEOC2q<R$NMQ8l$G!"8\5RB&$K(B
$B@_CV$5$l$k5!:`$r0UL#$7$^$9!#(B
($B$D$^$j$"$J$?$K4IM}$N@UG$$,$"$j$^$9(B)$B!#(BCSU/DSU$B!"%b%G%`!"(BANT$B!"EEOC$,$=$l$K(B
$BEv$?$j$^$9!#(B
<P>
<DT><B>DHCP</B><DD><P>Dynamic Host Configuration Protocol $BF0E*$K%[%9%H@_Dj$r9T$&$?$a$N(B
$B%W%m%H%3%k(B - $BF0E*$K(B IP $B%"%I%l%9$N3dEv$r9T$&:]$KMQ$$$k(B IP $B%W%m%H%3%k!#(B
<P>
<DT><B>DS0</B><DD><P>$BEEOC2q<R$,Ds6!$9$k4pK\%G%8%?%k2s@~!#(B- 56kbps $B$b$7$/$O(B 64kbps
$B$,Ds6!$5$l$F$$$^$9!#$R$H$D$N%"%J%m%02;@<%A%c%M%k$r%]!<%H$G$-$^$9!#(B
<P>
<DT><B>DSLAM</B><DD><P>Digital Subscriber Line Access Multiplexer $B%G%8%?%k2CF~<T@~B?=E(B
$B2=AuCV(B - $BEEOC2q<RFb@_CV5!4o$G!"(BDSL $B2s@~$r=8@~$7B?=E2=$7$^$9!#(B
<P>
<DT><B>xDSL</B><DD><P>x Digital Subscriber Line $B%G%8%?%k2CF~<T@~(B - DSL $B%5!<%S%9$NMM!9$J(B
$B8F$SJ}$rI=$o$7$^$9!#(B
ADSL, SDSL, VDSL $B$J$I$,$=$l$KEv$?$j$^$9!#(B
<P>
<DT><B>HDC</B><DD><P>2 $B>O$r8+$F$/$@$5$$!#(B
<P>
<DT><B>ISDN</B><DD><P>$BE}9g%5!<%S%9%G%8%?%kDL?.LV(B(<B>I</B>ntegrated <B>S</B>ervice
<B>D</B>igital <B>D</B>etwork)$B!#$?$@$7(B <B>I</B>nnovations <B>S</B>
ubscribers <B>D</B>on't <B>N</B>eed ($B2CF~<T$,I,MW$H$7$J$$5;=Q3W?7(B)$B$G$9!#(B
1 $BK\$N$h$jBPF<@~%1!<%V%k$G!"(B2B (64k) + 1D(16k) $B$N%A%c%M%k$r;H$$!"2;@<$H%G!<%?(B
$B$r$d$j$H$j$7$^$9!#(B
<P>
<DT><B>ISP</B><DD><P>Internet Service Provider $B%$%s%?!<%M%C%H!&%5!<%S%9!&%W%m%P%$%@(B
<P>
<DT><B>NID</B><DD><P>Network Interface Device $B%M%C%H%o!<%/!&%$%s%?!<%U%'!<%9!&%G%P%$%9(B
- ADSL $B$N%9%W%j%C%?!<$rJ]8n$9$k$?$a$K@_CV$5$l$k5!4o!#(B
<P>
<DT><B>NIC</B><DD><P>Network Interface Card $B%M%C%H%o!<%/!&%$%s%?!<%U%'!<%9!&%+!<%I(B -
$B%M%C%H%o!<%/!&%$%s%?!<%U%'!<%9$rDs6!$9$k(B PC $B%+!<%I!J(BPCI $B$d(B ISA $B%P%9MQ$,$"$k!K!#(B
$BDL>o$O(B 10baseT $B$d(B ATMF-25Mbps $B%+!<%I$,;H$o$l$^$9!#(B
<P>
<DT><B>POTS</B><DD><P>Plain Old Telephone Service $B@N$J$,$i$NEEOC%5!<%S%9(B - $B%"%J%m%0EEOC(B
$B2s@~$@$1$N%5!<%S%9(B($BNc$($P$"$J$?$NEEOC2s@~(B)$B!#(B
<P>
<DT><B>Recursion</B><DD><P>Recursion $B$r8+$F$/$@$5$$!#(B
<P>
<DT><B>SNI</B><DD><P>Subscriber Network Interface $B2CF~<T%M%C%H%o!<%/!&%$%s%?!<%U%'!<%9(B
- $BEEOC2q<R$NMQ8l$G!"2HDmB&$NEEOCG[@~$r0UL#$7$^$9!#EEOC2q<R$H2HDmFbG[@~$NJ,$+$l(B
$BL\I=$7$^$9!#6-3&E@(B (Demarcation Point)$B$H$b8F$S$^$9!#(B
<P>
<DT><B>$B%9%W%j%C%?!<(B</B><DD><P>SNI $B$K$"$kEE8;ITMW$N%G%P%$%9(B($BDc<~GHBS0h%U%#%k%?(B)$B$G(B ADSL
$B$N?.9f$r2;@<$H%G!<%?%A%c%M%k$KJ,3d$7$^$9!#(B
<P>
<DT><B>$B%9%W%j%C%?!<$J$7(B</B><DD><P>$B%9%W%j%C%?!<$r@_CV$7$J$$$G(B ADSL $B$r;HMQ$9$kJ}K!!#9bB.$G(B
$B;HMQ$9$k>l9g$O(B $B%"%J%m%0EEOC$r:9$79~$`%8%c%C%/$4$H$K(B RJ11 $B%U%#%k%?$r$D$1$F(B
NID $B$G%U%#%k%?$r$+$1$:$K%8%c%C%/$N$H$3$m$G$+$1$^$9!#DcB.$G;HMQ$9$k>l9g$O!"(B
$B%U%#%k%?$OMW$j$^$;$s!#(B
<P>
<DT><B>SOHO</B><DD><P>Small Office Home Office $B8D?M;v6H=j$b$7$/$O>.5,LO;v6H=j!#(B
<P>
<DT><B>T1</B><DD><P>DS1 $B$H$b8F$S$^$9!#(B - 1.544 Mbps $B$N%G%8%?%k@lMQ@~!#(B24 $BK\$N(B DS0 $B$H$7$F(B
$B;H$o$l!"2;@<$H%G!<%?EAAw$GMxMQ$5$l$F$$$^$9!#(B
<P>
<DT><B>T3</B><DD><P>DS3 $B$H$b8F$S$^$9!#(B - 44.736 Mbps $B$N%G%8%?%k@lMQ@~!#(B672 $BK\$N(B DS0
$B$b$7$/$O(B 28 $BK\$N(B DS1 $B$H$7$F;H$o$l!"2;@<$H%G!<%?EAAw$GMxMQ$5$l$F$$$^$9!#(B
<P>
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