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B3ZS at AllExperts (149 words) |
 | B3ZS is an abbreviation for bipolar with three-zero substitution, a T-carrier line code in which bipolar violations are deliberately inserted if the stream of user data contains a string of 3 or more consecutive zeros. |
| B3ZS is used to ensure a sufficient number of transitions to maintain system synchronization when the user data stream contains an insufficient number of "ones" to do so. |
| B3ZS is generally used on T3 lines in the North American hierarchy. |
| Enhanced B3ZS decoder and method for identifying true zero-substitutions - Patent 5631928 (3334 words) |
| The B3ZS decoder of claim 8, wherein said first register means comprises a first linear array shift register for receiving a positive train of said pulse train signal, and a second linear array shift register for receiving a negative train of said pulse train signal. |
| Thus the enhanced B3ZS decoder and method of the present invention is capable of restoring corrupted zero substitutions and minimizes erroneous substitution of zeros for certain error-related BPVs. |
| The enhanced B3ZS decoder of the present invention avoids this problem by using the shift register 26 to perform the resubstitution, thereby ensuring that the positive and negative data rail shift registers 22 and 24 retain the information of the received substitution pattern. |
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