B3ZS (North American T3)
At the North American T3 rate (44.736 Mbit/s), bipolar violations are inserted if 3 or more consecutive zeros occur. This line code is called bipolar with three-zero substitution (B3ZS), and is very similar to HDB3. Each run of 3 consecutive zeros is replaced by "00V" or "B0V". The choice is made to ensure that consecutive violations are of differing polarity, i.e. separated by an odd number of normal B marks.
Number of B bits since last V |
Pattern | Polarity of last B |
Coded |
---|---|---|---|
odd | 00V | + | 00+ |
− | 00− | ||
even | B0V | + | −0− |
− | +0+ |
Read more about this topic: Modified AMI Code
Famous quotes containing the word american:
“The American West is just arriving at the threshold of its greatness and growth. Where the West of yesterday is glamorized in our fiction, the future of the American West now is both fabulous and factual.”
—Lyndon Baines Johnson (19081973)