xDSL . x DSL DSL, . xDSL-, ENSI,ANSI ITU.
xDSL . , , SDL xDSL. : WDSL(W-wireless), AirDSL, skyDSL- ,FDSL(F-fiber);PDSL(P-powerline). , .
DSL(Digital Subscriber Loop) , ISDN- . ISDN( 64 / 16 / ), DSL , .
DSL- 90- DSL DSL(High bit rate Digital Subscriber Line)- . DSL 2/. . DSL , . ( ) . DSL ( ), (,) .
DSL , SDSL(Single Pair Symmetrical Digital Subscriber Loop). DSL, , DSL VDSL.
DSL(Asymmetric DSL) 8/ 640 / Internet. DSL , , , . DSL, , . , Internet- 155 /(STM-1) 8 / 20 (155/8).
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RADSL(Rate-Adaptive DSL)- . , , , ( , ) . - DSL DSL DSL . .
VDSL(Very high bitrate DSL) . . VDSL (5155/) ( DSL), 300 , . , , . , . VDSL .
G.Lite DSL. G.Lite . DSL , , , , , .