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EntityQ221998· pop 7· linked from 41 articles

2B1Q

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Two-binary, one-quaternary (2B1Q) is a line code used in the U interface of the Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) and the high-bit-rate digital subscriber line (HDSL). 2B1Q is a four-level pulse-amplitude modulation (PAM-4) scheme without redundancy, mapping two bits (2B) into one quaternary symbol (1Q). Symbol rate is half of data rate.

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Two-binary, one-quaternary (2B1Q) is a line code used in the U interface of the Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) and the high-bit-rate digital subscriber line (HDSL). 2B1Q is a four-level pulse-amplitude modulation (PAM-4) scheme without redundancy, mapping two bits (2B) into one quaternary symbol (1Q). Symbol rate is half of data rate.

A competing encoding technique in the ISDN basic rate U interface, mainly used in Europe, is 4B3T.

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Differential Manchester encoding
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International Standard Book Number
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binary numeral system
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modulation
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Integrated Services Digital Network
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data transmission
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baud
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digital signal
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bit rate
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pulse-code modulation
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Gray code
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serial communication
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quaternary numeral system
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Manchester code
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unit of information
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pulse-amplitude modulation
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baseband
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line code
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eight-to-fourteen modulation
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bipolar encoding
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Categories

Integrated Services Digital NetworkLine codes