:

,

UIT-T

(/)

V.22 bis

1984

1200/2400

V.32

1984

4800/9600

V.32 bis

1991

4800/7200/9600/12000/14400

V.34

1994

2400 28000

( 2400 )

, .. . 1998 64000 /.

, . , , , . 2 /.

, . — ( , — ) . .







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