.2.3, , (Non Return to Zero, NRZ). , ( , ). NRZ , (- ), -. . , .
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NRZ (Bipolar Alternate Mark Inversion, AMI). B (.2.3, ) , . , , , .
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(Mon Return to Zero with ones Inverted, NRZI) , ( ), . , , , , .
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, , . , , (.2.3, ), . . , , . , , .
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(.2.3, ). Ethernet Token Ring.
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2B1Q.
.2.3, . 2B1Q, (2) , (1Q). 00 -2,5 , 01 -0,833 , 11 +0,833 , a nape 10 +2,5 . , . , NRZ, . , 21Q , AMI NRZI. , .