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Tele-Communication (Telecom) Terms Glossary and Dictionary
B8ZS: Bipolar 8 Zero Substitution
Bipolar 8 Zero Substitution (B8ZS) is a method of line coding used in the T-carrier system which allows full 64 Kbit/s per second per channel. On a T1, ones are sent by applying voltage to the wire, where a zero is sent by having no voltage on the wire. Sending eight zeros in a row could cause T1 equipment to lose synchronization with the sending equipment, it is important that that pattern is not sent.
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