, - (Carrierless Amplitude/Phase Modulation CAP). CAP . CAP , V.32 V.34. , 64 128 . , , , .
64- CAP-64 6 , .. . CAP-128, SDSL (2/ ), 128- 7 . , , , , (. 11)
, CAP, 260 , , 2B1Q HDB3. .2 HDSL.
( 260) ( 40 ) CAP ( , ) , ( ).
CAP ( ) () 4 . .