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A digital code having two information states, e.g., "0" and "1" or "mark" and "yyspace", in which code the signal returns to a rest state during a portion of the bit period. 2. A code form having two information states termed "zero" and "one" and having a third state or an at-rest condition to which the signal returns during each rest period. In this specification, the at-rest condition is the zero state. [T1.106-1988]
- Browse Related Terms: a-law algorithm, bit synchronization, mu-law (µ-law) algorithm, return-to-zero (RZ), signal element, SLIP, SONET, synchronization bit, synchronization code, synchronous optical network, synchronous transport signal level 1 (STS-1)