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2B1Q
Last modified: Tuesday, September 03, 2002
Short for
2
B
inary
1
Q
uaternary
, a
full duplex
physical layer encoding method used in
ISDN
and other digital communication technologies. In 2B1Q, two
binary
bits
are encoded into one quaternary signal, doubling the effectiveness of transmission.
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ISDN
full-duplex
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