A pseudoternary signal , representing binary digits, in which (a) successive "marks" are of alternately positive and negative polarity and the absolute values of their amplitudes are normally equal and (b) "spaces" are of zero amplitude.
ALTERNATE MARK INVERSION (AMI) SIGNAL
Meaning of ALTERNATE MARK INVERSION (AMI) SIGNAL in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012