Definition: | a method of justification in which the digit time-slots used to convey a digital signal have a digit rate that is always higher than the digit rate of the original signal, and in which at each justification instant, depending on the prevailing conditions, either:
a) no digit of the original signal is transmitted but, instead, a justifying digit is transmitted in the justifiable digit time-slot, or
b) one digit of the original signal is transmitted in the justifiable digit time-slot,
with these two alternative justification states being indicated by unique signals formed from justification service digits
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