bipolar with six-zero substitution (B6ZS)

B6ZS coding, Bipolar with Six-Zero Substitution (B6ZS), is a channel coding with Bipolar Violation ( BPV) and Alternate Mark Inversion ( AMI) compliantbits. The Bipolar Violation bits are forcibly inserted when the data stream has more than six consecutive zeros. This ensures that the data stream has sufficient level changesfor synchronization. The B6ZS coding essentially corresponds to the HDB3 coding and is used in the North American T- line( T2).