| slovo | definícia |
two-binary, one-quaternary
(foldoc) | two-binary, one-quaternary
2B1Q
(2B1Q) A physical layer encoding used for
Integrated Services Digital Network basic rate interface.
2B1Q represents two bits (2B - a "dibit") using one of four
signal levels (1Q - a "quadratude"). The first bit of the
dibit is indicated by polarity: positive indicates a binary 1
and negative indicates a 0. The second half of the dibit is
indicated by voltage magnitude: 1 Volt indicates a binary 1
and 3 Volts indicates binary 0.
(2003-01-10)
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