AMI, NRZI 2Q1B. , , . , - .
, . , , . , 4/5, FDDI Fast Ethernet, 4 5 . , , . , 4/5 32 , - 16. 16 , , (code violation). , . , , .
4/5 .
4/5 , . 4/5 5 , .
, 2 - binary - . , , 8/6 8 6 , . 8/6 , 4/5, 256 36=729 .
, .
, , . , 4/5 100 / 125 . , , . , , .
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. , :
Bi - , i- , Ai - , i- , Bi- Bi-5 - , , 3 5 , - ( 2). , 110110000001 : B1 = 1 = 1 ( , )
, 110001101111, , .
, :
, , . , ISDN 5 23 , - 18 23 .
, .
Bipolar AMI , .
. 2.17 B8ZS (Bipolar with 8-Zeros Substitution) HDB3 (High-Density Bipolar 3-Zeros) AMI. : - 8, - 5.
. 2.17. B8ZS HDB3. V - ; 1*- , 0
B8ZS , 8 . : V-1*-0-V-1*. V , , , , 1* - , , , . 8 2 - , - . 8 8 . B8ZS , .
HDB3 . HDB3 , B8ZS. , V. V . , . , 000V, - 1*00V.
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, . . 2.18 , , . . , . . 2.18 , NRZ - . , , , , ( 4/5 B8ZS, , 1/4 ). , FDDI, Fast Ethernet, Gigabit Ethernet, ISDN . . .
. 2.18.