Bipolar violation


Bipolar violation

A Bipolar Violation, Bipolarity Violation", or BPV"', is an error in the transmission of a T1 signal where two pulses of the same polarity occur without an intervening pulse of the opposite polarity.

T1 signals are transmitted using a scheme called Alternate Mark Inversion (AMI), where a ONE is represented by a pulse, and a ZERO is represented by no pulse. Pulses (which represent ones) always alternate in polarity, so that if, for example two positive pulses are received in succession, the receiver knows that one or more bits were either added or deleted from the original signal.

B8ZS coding is a scheme used in addition to AMI, which allows longer strings of consecutive zeroes to be transmitted, thus meeting the ones density requirement of T-1 standards which forbids consecutive strings of fifteen or more zeroes.


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • bipolar violation —    Presence of two consecutive one bits of the same polarity on the T carrier line …   IT glossary of terms, acronyms and abbreviations

  • Bipolar encoding — An example of bipolar encoding, or AMI (Alternate mark inversion). In telecommunication, bipolar encoding is a type of line code (a method of encoding digital information to make it resistant to certain forms of signal loss during transmission).… …   Wikipedia

  • bipolar pulse violation — (BPV)    A bipolar pulse with the same polarity as the preceding pulse …   IT glossary of terms, acronyms and abbreviations

  • Modified AMI code — Modified AMI codes are Alternate Mark Inversion (AMI) line codes in which bipolar violations may be deliberately inserted to maintain system synchronization. There are several types of modified AMI codes, used in various T carrier and E carrier… …   Wikipedia

  • Unipolar encoding — is a line code. A positive voltage represents a binary 1, and zero volts indicates a binary 0.Its drawbacks are that it is not self clocking and it has a significant DC component component, which can be halved by using return to zero, where the… …   Wikipedia

  • List of algebraic coding theory topics — This is a list of algebraic coding theory topics. ARQ[disambiguation needed  ] Adler 32 BCH code BCJR algorithm Berger code Berlekamp Massey algo …   Wikipedia

  • проверка нарушения биполярности — Процедура обнаружения ошибок в биполярном сигнале, основанная на анализе закона чередования полярностей принимаемых символов. Ошибкой считается ситуация, когда последующий символ имеет ту же полярность, что и предыдущий. [Л.М. Невдяев.… …   Справочник технического переводчика

  • BPV — abbr. BiPolar Violation (error event) (DS1/E1, DS3/E3) …   United dictionary of abbreviations and acronyms

  • international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium

  • disorder — A disturbance of function, structure, or both, resulting from a genetic or embryonic failure in development or from exogenous factors such as poison, trauma, or disease. adjustmen …   Medical dictionary


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.